Skocz do pozycji: 1.

Tytuł:

Electrochemical microprocessing assisted by Diode Pumped Solid State Nd:YAG pulse laser

Autorzy:

Wyszyński, D.
Skoczypiec, S.
Grabowski, M.
Ruszaj, A.
Lipiec, P.

Powiązania:

https://bibliotekanauki.pl/articles/99549.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

electrochemical machining
laser beam machining
micromachining

Opis:

The use of hybrid machining methods for parts and devices production become more and more attractive nowadays. The paper presents results of modelling use of DPSS (Diode Pumped Solid State) pulse laser for intensification of electrochemical processes in machine part production. Application of DPSS pulse laser enables possibility to reach high level of localization in both machining and growth processes. Laser beam energy accelerates electrochemical processing, improves process localization and prevents other than the machined surface passivation. These conditions should improve electrochemical micro part precision of manufacturing by means of shape and dimensional accuracy in both machining and growth ECM processing.

Źródło:

Journal of Machine Engineering; 2012, 12, 1; 131-142
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Analysis of Corners Milling of Aluminum Alloy Elements

Autorzy:

Anasiewicz, K.
Włodarczyk, M.

Powiązania:

https://bibliotekanauki.pl/articles/2065028.pdf

Data publikacji:

2018

Wydawca:

STE GROUP

Tematy:

aluminum machining
surface roughness
machining strategy

Opis:

The article presents comparative research on the effects of milling of concave corners of elements made of aluminum alloy 7075. The work focuses on the study of the impact of changes in technological parameters and types of machining on the obtained geometrical state of the machined samples. Correct milling of the corners requires selection of the appropriate feed rate and the proper engagement angle of the milling cutter. At the corners, tool engagement angle increases, which significantly hinders the execution of stable machining and adversely affects the geometric and qualitative characteristics of the surface in the corners. Study with application of various strategies and technological parameters of milling corners with variable opening angles were carried out. The main parameters of surface roughness of the machined elements were examined. When analyzing the results obtained, conclusions were formulated indicating the relationship between the change of selected technological parameters, with the assumed type of treatment, and the obtained quality parameters of the samples made.

Źródło:

Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 33--39
2545-2827

Pojawia się w:

Multidisciplinary Aspects of Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Analysis and simulation of nonlinear self-excited vibrations in turning

Autorzy:

Zeleny, J.
Repak, T.
Fojtu, P.

Powiązania:

https://bibliotekanauki.pl/articles/1429152.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machine tool
machining
machining process
self-excited vibrations

Opis:

Commonly applied theories of self-excited vibrations in machine tools are prevailingly based on frequency domain analysis of linear models and are devoted in most cases only to evaluation of stability limits of strictly linear systems. In this way, the behaviour of more stable or more unstable systems cannot be studied and analyzed. Certain important nonlinear effects cannot be studied as well for limitations connected with classical representation of systems only in the frequency domain. Evaluation of stability by analysis of nonlinear systems in time domain has not been applied until now. The paper shows a new approach based on interpretation of the self-excited vibration systems as nonlinear servo-systems. With this approach, linear and nonlinear systems of any degree of stability can be studied by combination of frequency and time-domain methods. This can considerably contribute to better understanding of complex phenomena in various regimes and special situations.

Źródło:

Journal of Machine Engineering; 2008, 8, 4; 68-79
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Feed drive simulation for the prediction of the tool path follow up in High Speed Machining

Autorzy:

Prevost, D.
Lavernhe, S.
Lartigue, C.

Powiązania:

https://bibliotekanauki.pl/articles/1429192.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

simulation
high speed machining
5-axis machining
identification

Opis:

This paper deals with an advanced modeling of the feed drives of a five axis machine tool within the context of High Speed Machining. The management of the multi axes as well as high velocities causes problems to the set machine tool – Numerical Controller throughout the trajectory execution process. As a result, many errors are introduced during machining all process long affecting the surface quality. The paper aims at modeling the feed drive dynamics during trajectory follow-up including the current, the velocity and position loops as well as the feed forward terms, which characterize classical drives on actual HSM machines. It concerns translational axes as well as rotary axes. A procedure of identification of the virtual axis model are detailed for three and five axis trajectories presenting various types of geometrical discontinuities.

Źródło:

Journal of Machine Engineering; 2008, 8, 4; 32-42
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Zastosowanie autonomicznych głowic obróbkowych w procesach wygładzania materiałów trudnoskrawalnych w przemyśle samochodowym
Application of autonomous machining heads in smoothing processes of hard-wearing materials in the automotive and aerospace industries

Autorzy:

Gotowała, K.
Musiał, W.

Powiązania:

https://bibliotekanauki.pl/articles/315848.pdf

Data publikacji:

2017

Wydawca:

Instytut Naukowo-Wydawniczy "SPATIUM"

Tematy:

obróbka
wygładzanie
głowica obróbkowa
machining
smoothing
machining head

Opis:

W artykule przedstawiono innowacyjny sposób obróbki materiałów trudnoskrawalnych, który może być wdrożony w przemyśle samochodowym i lotniczym. Przedstawiono obróbkę wygładzającą powierzchni krzywoliniowych. Zaprezentowana metoda obróbki może być wykorzystana do wygładzania powierzchni i krawędzi odlewów powstałych na skutek realizacji procesu produkcyjnego części samochodowych i lotniczych. Metoda obróbki powierzchni i krawędzi, może być wykorzystana również po cięciu laserowym i innych obróbkach erozyjnych.
The article presents the method of processing hard-wearing materials used in the automotive and aviation industry. The smoothing treatment of curvilinear surfaces is shown. The presented machining method can be used to smooth the surfaces and edges of castings resulting from the production process of automotive parts. The surface and edge treatment method can also be used after laser cutting.

Źródło:

Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 328-330
1509-5878
2450-7725

Pojawia się w:

Autobusy : technika, eksploatacja, systemy transportowe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Płyny obróbkowe w obróbce skrawaniem – wybrane aspekty ich stosowania
Machining fluids in machining – selected aspect of their application

Autorzy:

Kowalczyk, Joanna
Madej, Monika

Powiązania:

https://bibliotekanauki.pl/articles/404395.pdf

Data publikacji:

2019

Wydawca:

Wydawnictwo AWART

Tematy:

machining
machining fluid
way of cooling
effectiveness of machining
płyny obróbkowe
chropowatość powierzchni
obróbka skrawaniem

Opis:

Machining fluids are commonly used in a wide range of machining application. In this paper numerous functions of these fluids and ways of increasing their effectiveness during machining were presented. The effect of different types of machining fluids on the roughness of the machined surface were also compared.
W szeroko rozumianej obróbce skrawaniem powszechnie używane są płyny obróbkowe. W artykule przedstawiono liczne funkcje tych płynów oraz sposoby zwiększania efektywności ich oddziaływania podczas obróbki. Porównano także efekty zastosowania różnych rodzajów płynów obróbkowych w aspekcie chropowatości obrabianej powierzchni.

Źródło:

Obróbka Metalu; 2019, 2; 34-37
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Optimizing Body Machining Including Variable Casting Allowances

Autorzy:

Gessner, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1841423.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cast iron geometry assessment
machining allowance
machining cost minimization

Opis:

The work contains the results of research conducted to optimize the machining of milling table castings. The possibility of reducing the total volume of machining allowances, reducing the wear of cutting tools, shortening machining time and eliminating idle machining passes was considered. The tests were carried out on two batches of castings supplied by two independent foundries. Casting geometry measurements were made using a structured light scanner. The analysis included machining with cemented carbide tools and tool ceramics at two machining centers: DMC200U and DMC270U. It has been shown that as a result of eliminating idle machining passes, it is possible to reduce machining time by 12% for the first and by 44% for the second casting supplier. The estimated annual savings for the production volume of 500 pcs of these castings can range from € 7388 to even € 23 346. The actual cost of cheaper casts was also calculated, taking into account the difference in machining cost resulting from larger machining allowances.

Źródło:

Management and Production Engineering Review; 2021, 12, 2; 65-74
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Analiza wpływu zmian wybranych parametrów skrawania na poziom sygnału wibroakustycznego – studium przypadku
An analysis of the influence of changes in selected machining parameters on the level of vibroacoustic signal – case study

Autorzy:

Profaska, M.
Domagała, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/112782.pdf

Data publikacji:

2014

Wydawca:

STE GROUP

Tematy:

diagnostyka
obróbka skrawaniem
parametry skrawania
vibroacoustics
machining
machining parameters

Opis:

W każdej dziedzinie produkcji, również w obróbce mechanicznej, dąży się do zwiększenia jej wydajności i efektywności. Do wyznaczenia optymalnych parametrów skrawania, może być pomocne określenie poziomu sygnału wibroakustycznego emitowanego podczas obróbki. W publikacji przed-stawiono badania wpływu wybranych parametrów skrawania na poziom sygnału wibroakustycznego, przy obróbce odcinka rury bezszwowej, ze stali węglowej konstrukcyjnej w gatunku S235JR na tokarce uniwersalnej.
In each area of production, including machining, one strives to increase efficiency and effectiveness. Determining the level of a vibroacoustic signal emitted in the machining process could help to establish optimal machining parameters. The publication presents investigations into the influence of selected machining parameters on the level of vibroacoustic signal in the process of machining a seamless pipe made of structural carbon steel – grade S235JR, using a universal lathe.

Źródło:

Systemy Wspomagania w Inżynierii Produkcji; 2014, 2 (8); 186-199
2391-9361

Pojawia się w:

Systemy Wspomagania w Inżynierii Produkcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Establishing a basis for sustainable re-use of cutting tools through laser decoating

Autorzy:

Mativenga, P.
Rajemi, M.
Marimuthu, S.
Li, L.
Yang, Sh.
Cooke, K.

Powiązania:

https://bibliotekanauki.pl/articles/99401.pdf

Data publikacji:

2010

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

reuse
laser
machining

Opis:

There is an urgent and growing need to reduce the environmental footprints of products and manufacturing processes and to support sustainable material consumption. For engineering applications this implies the need to develop low energy/carbon footprint manufacturing processes tha utilise extended life tooling. In machining, nano-structured coatings can be used to extend service life of cutting tools. However, hard coatings pose a challenge to the re-shaping and re-use of tools. This work investigated the use and re-use of cutting tools by developing selective tool coating removal using laser and conventional chemical de-coating technology. The laser de-coated tools were re-coated and their machining performance was compared to that of chemical de-coated and re-coated tools as well as first generation coated and uncoated tools. The paper presents a comparison of the energy footprints associated with the re-use of tooling. It is concluded that high value tooling can exploit material re-use procedures.

Źródło:

Journal of Machine Engineering; 2010, 10, 2; 36-47
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

Electrochemical machining - special equipment and applications in aircraft industry

Autorzy:

Ruszaj, A.
Gawlik, J.
Skoczypiec, S.

Powiązania:

https://bibliotekanauki.pl/articles/407012.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

electrochemical machining
machining of special materials
turbine blades
aircraft engines

Opis:

Electrochemical machining is an unique method of shaping in which, for optimal parameters tool has no wear, surface layer properties after machining are similar to the core material and surface quality and accuracy increase together with material removal rate increase. Such advantages of electrochemical machining, besides of some ecological problems, create industry interest in the range of manufacturing elements made of materials with special properties (i.e. turbine blades of flow aircrafts engines). In the paper the nowadays possibilities and recent practical application of electrochemical machining in aircraft have been presented.

Źródło:

Management and Production Engineering Review; 2016, 7, 2; 34-41
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 11.

Tytuł:

Dokładność obróbki elementów wielkogabarytowych – zagadnienia technologiczne
Large-size elemets machining accuracy – technological problems

Autorzy:

Styp-Rekowski, M.
Matuszewski, M.
Oborski, I. L.
Bromberek, F.

Powiązania:

https://bibliotekanauki.pl/articles/404449.pdf

Data publikacji:

2015

Wydawca:

Wydawnictwo AWART

Tematy:

obróka elementów wielkogabarytowych
dokładność
machining
machining accuracy
large-size element

Opis:

W artykule przedstawiono czynniki technologiczne determinujące dokładność obróbki elementów, zwłaszcza wielkogabarytowych. Przedstawiono także sposoby aby zminimalizować negatywny wpływ tych czynników na dokładność wymiarową elementów.
In the paper there were presented technological factors which determine element's machining accuracy, particularly large-size elements. The ways which enable minimization their negative influence on dimensional accuracy were presented too.

Źródło:

Obróbka Metalu; 2015, 3; 11-14
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Hybrid additive and subtractive manufacturing processes and systems: a review

Autorzy:

Grzesik, W.

Powiązania:

https://bibliotekanauki.pl/articles/99525.pdf

Data publikacji:

2018

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

hybrid manufacturing
CNC machining
additive machining
laser cladding
repair technology

Opis:

This review paper highlights the hybrid manufacturing processes which integrate the additive and subtractive processes performing on one hybrid platform consisting of the LMD (laser metal deposition) unit and CNC machine tools. In particular, some important rules and advantages as well as technological potentials of the integration of different AM technique and finishing CNC machining operations are discussed and overviewed. Some representative examples such as formation of difficult features around the part periphery, deposition of functional layers and coatings and repair of high-value parts in aerospace industry are provided. Some conclusions and future trends in the implementation of hybrid processes are outlined.

Źródło:

Journal of Machine Engineering; 2018, 18, 4; 5-24
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Assessment of the safety of use of portable machine tools

Autorzy:

Nowak, M.
Terelak-Tymczyna, A.

Powiązania:

https://bibliotekanauki.pl/articles/30147065.pdf

Data publikacji:

2018

Wydawca:

Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki

Tematy:

portable machine tools
portable machining
on-site machining
risk analysis
safety

Opis:

The article presents safety issues related to on-site machining with the use of portable machine tools. Their advantage is the possibility of machining elements at places in which they are used. This especially refers to large-size constructions, welded elements and any items whose disassembly is technically difficult. The authors present tasks performed by the operators of portable machining equipment, working conditions, construction and characteristic features of portable machine tools on the example of a portable boring machine, milling machine and flange facing machine. The presented characteristics can influence the safety of work with these machines. The information given in the article were used to asses risk at the position of a portable machine tool operator. The assessment was conducted using the Risk Score method taking into account four stages of using portable machine tools, i.e. transport, assembly/disassembly, machining and maintenance. The result of the conducted risk analysis is the proposal of possible risk reducing actions. Due to the specificity of the operation of portable machine tools which significantly impedes the development of a machine tool which would be safe in and of itself, the proposed actions refer mainly to organisational solutions. The work presents also the thesis that it is possible to decrease the risk at this position thanks to the use of numerical control in a portable machine tool. Such a solution may reduce exposure to some identified threats. The issue is presented on the example of a prototype of a portable flange facing machine developed in the Institute of Mechanical Technology ZUT in Szczecin.

Źródło:

Scientific Journal of the Military University of Land Forces; 2018, 50, 3(189); 192-205
2544-7122
2545-0719

Pojawia się w:

Scientific Journal of the Military University of Land Forces

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

A New Multidisciplinary Approach For Three-Dimensional Foil Machining

Autorzy:

Jaouen, R.
Martineau, J. P.
Hascoet, J.-Y.
Damay, T.

Powiązania:

https://bibliotekanauki.pl/articles/971241.pdf

Data publikacji:

2009

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

adapted tool trajectories
5 axis machining machining peaks
hydrofoil lspropellers
hydrodynamic

Opis:

The context of this paper implies disciplines of mechanical design, machining and hydrodynamics behaviours applied to propellers. Performances of propellers are linked with their shape and their surface texture. To optimise hydrodynamics behaviours, it is demonstrated in this paper that required polishing operation is not essential. To study the influence of an predefined surface texture on the performances of a three-dimensional foil, a comparative analysis is conducted. The presented methodology allows the definition of tool paths, according to the desired surface texture and upstream flow. Three foils are machined, and their performances are compared to each other: the first, considered as the reference, has a surface roughness like mirror, the second features machined peaks parallel to the upstream flow and the third has machined peaks following streamlines obtained by Computational Fluid Dynamics for operating conditions. The validation of this method is experimental: on the one hand by the manufacturing of foils following pre-established trajectories, and on the other hand by the functional test in hydrodynamic tunnel. This paper presents the methodology steps, and the hydrodynamic behaviours that the three different foils show. In a first approach, the different surface textures do not influence the lift coefficient but strongly influence the drag coefficient of a foil. Furthermore several hypotheses educed from the observed tendencies are discussed.

Źródło:

Journal of Machine Engineering; 2009, 9, 1; 5-17
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Modelling of material behaviour for Inconel 718 superalloy using experimental data

Autorzy:

Nieslony, P.
Grzesik, W.
Laskowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/99822.pdf

Data publikacji:

2017

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

modeling
machining
constitutive model

Opis:

In this paper parameters of the Johnson-Cook (J-C) constitutive material model were predicted more accurately based on the static and dynamic material tests and mathematical modelling of relevant response surfaces using specially developed Matlab scripts. Experimental tests were performed under strain rates of 10^-3 and 10¹ 1/s and the temperature ranging from the ambient up to 700°C. As a result, a set of mathematical models which fit the experimental data was determined. The experimentally-derived constitutive models were implemented into FEM-based simulations of real machining processes of Inconel 718.

Źródło:

Journal of Machine Engineering; 2017, 17, 3; 75-84
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Features of magneto-abrasive machining of taps

Autorzy:

Maiboroda, Victor
Tarhan, Dmytro
Dzhulii, Dmytro
Slobodianiuk, Ivanna

Powiązania:

https://bibliotekanauki.pl/articles/387037.pdf

Data publikacji:

2020

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

tap
magneto-abrasive machining
cutting tools
machining intensity
polishing effect
strengthening effect

Opis:

The features of magneto-abrasive machining of taps for metric thread cutting were investigated. The calculation method of integral intensity of the magneto-abrasive machining of the working surfaces of the taps by the quantitative values of normal and tangential components of moving speed of the quasi-stable volumes of the magneto-abrasive tool was developed. Based on the results of calculations, it was possible to predict the probable influence of the taps’ location in the working zone on the quality and efficiency of machining their working surfaces. The calculation method is relevant for taps of all diameters with a profile angle of 60°. The working surfaces of the tool would not be effectively machined if the location angle of taps to the plane of the working zone of the machine equals 20–60°. Depending on the expected major polishing or strengthening effect of magneto-abrasive machining, the taps are required to be located at an angle of 60–90° to the plane of the working zone of the machine.

Źródło:

Acta Mechanica et Automatica; 2020, 14, 1; 1-7
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Comparative Analysis of the Production Process of a Flange-Type Product by the Hybrid and Traditional Method with the Use of Simulation Methods

Autorzy:

Terelak-Tymczyna, Agnieszka
Bachtiak-Radka, Emilia
Jardzioch, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/2067547.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining
hybrid machining
VSM
SLM
process simulation
cost of the production
energy analysis

Opis:

In the era of Industry 4.0, the digitization of production processes is one of the important elements contributing to the reduction of uncertainty related to the implementation of new production methods. The worldwide epidemic situation and its constraints have resulted in supply chain continuity problems. These problems make enterprises look for the possibility of producing products that they need at the moment and which they cannot obtain from the market. In special cases, this may also apply to spare parts necessary to maintain the continuity of production. The main reason for research on comparing production processes is meeting the challenges related to the pandemic situation and problems in maintaining timeliness, flexibility, and continuity of the supply chain. The first stage of the research was to visualize the course of the process and determine the lead times for both production methods. For further analysis, a digital process model was used to compare the hybrid and the classical method to check the viability of the interchangeability of methods for the production process of the flange part. The interchangeability of production methods was dictated by problems related to the supply of components for the execution of orders. The article simulates the model for unit and small-lot production in batches of 10 and 100 pieces, considering such aspects as: order completion time, energy consumption of the process, production costs, taking into account the classic and hybrid methods. The conducted research was aimed at determining the profitability of the production of flange-type products by means of classical processing and hybrid and checking the interchangeability of production methods in accordance with quality requirements as well as reducing uncertainty with the implementation of new production systems in changing market conditions. The simulations show that the use of hybrid production is recommended for unit production. In the case of small-lot production, already with 10 items, production in the traditional process is 21% cheaper, and for the production of 100 items, the cost of traditional production is reduced by 33% compared to hybrid production.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 1; 231--242
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Procesy elektroerozyjne, ścierne, ścierno-elektroerozyjne realizowane przez jedną obrabiarkę
Electro - erosion, abrasive, abrasive - electro - erosion processes realized by on tool machine

Autorzy:

Mielnicki, W.
Frankowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/269820.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

obróbka elektroerozyjna
obróbka ścierno-elektroerozyjna
szlifierka
electrodischarge machining (WEDM)
electro-abrasive machining
grinder

Opis:

W artykule przedstawiono niektóre rezultaty badań własnych, które pozwoliły na skonstruowanie i wykonanie szlifierki narzędziowej MES0 25 CNC. Jest ona nowatorskim rozwiązaniem w świecie, gdyż oprócz możliwości realizacji procesów szlifowania klasycznego, obciągania i profilowania elektroerozyjnego ściernic, co jest rozwiązaniem stosowanym przez przodujące firmy np. V0LLMER i WALTER, pozwala na ścierno-elektroerozyjne kształtowanie powierzchni roboczych różnego rodzaju narzędzi skrawających, w tym ostrzy diamentowych PCD i z węglików spiekanych.
The paper presents some results of our research which led to the construction and manufacturing of tool grinding machineMES025CNC. It is an innovative solution in the world, because in addition to classical grinding processes, EDM dressing and profiling wheels, used by companies such as: V0LLMERandWALTER, allows applying the abrasive - electro - erosion process for forming the working surfaces of various types of cutting tools including diamond PCD, carbide and others inserts.

Źródło:

Inżynieria Maszyn; 2011, R. 16, z. 3; 61-69
1426-708X

Pojawia się w:

Inżynieria Maszyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Niekonwencjonalna metoda utylizacji opon
Non-conventional method of tires utilization

Autorzy:

Holka, H.
Wełnowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/270092.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

opony
utylizacja
recykling
water-jet machining
frezowanie
tires
utilization
recycling
waterjet machining
milling

Opis:

Zagadnienie utylizacji opon jest jednym z ważniejszych problemów światowej gospodarki w sferze ekologicznej. W niniejszej pracy opisano nową, oryginalną technologię utylizacji. W metodzie, nazwanej ze względu na jej cechy Rotarex Fast & Easy, wykorzystano frezowanie. Zaprezentowano narzędzie do obróbki oraz opisano skonstruowaną i wyprodukowaną maszynę, realizującą tę technologię.
The utilization of the tires is one of the most important world task in ecological sphere. New, original technology of tires utilization have been described in this paper. In described method, called according to its features Rotarex Fast & Easy milling is used. Designed and produced machine-tool have been presented, as well as special tool were described.

Źródło:

Inżynieria Maszyn; 2011, R. 16, z. 4; 139-145
1426-708X

Pojawia się w:

Inżynieria Maszyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Behaviour of elasto/visco-plastic workpiece material during machining

Autorzy:

Chodor, J.
Kukiełka, L.

Powiązania:

https://bibliotekanauki.pl/articles/99651.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machining
modeling
numerical simulations
chip

Opis:

Experimental investigations of plastic deformation and uniaxial tension of elasto/visco-plastic (E/V-P) material (41Cr4) were conducted to characterize the flow behavior of the material. Dynamic effects, constitutive damage law and contact with non-linear friction in simulations were described using updated Lagrangian formulation. That model of the process allows defining advanced simulations of tool's penetration in workpiece and chip formation. The yield stress is taken as a function of the strain and the strain rate in order to reflect realistic behavior of unsteady-state process, a material separation criterion based on the failure strain ?f were determined Finite element simulations were carried out using ANSYS code. The influence of the chosen process parameter in numerical simulations on the chip's shapes was presented. Results revealed good agreements between FEM results and experimental ones.

Źródło:

Journal of Machine Engineering; 2012, 12, 4; 99-116
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Development of intelligent lapping system estimation of finished surface roughness and its improvement speed

Autorzy:

Iyama, T.
Tanabe, I.
Moe, A. L.
Yoshi, K.
Nasu, F.

Powiązania:

https://bibliotekanauki.pl/articles/99666.pdf

Data publikacji:

2010

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

abrasive machining
lapping
intelligent finishing

Opis:

The lapping process is one of the traditional finishing processes and generally it is conducted as manual process by skilled worker. The productivity of these manual processes is lower and difficult to control. Hence, we developed an automatic lapping system for moulds and dies. The lapping system consists of simple lapping tools and conventional milling machine. Several materials were machined as mirror like surface using the system. The lapping conditions are usually decided by skilled worker's experience or knowhow. Therefore, in this study, an intelligent lapping system with the optimum conditions calculated by the lapping model was developed. Specifically, the relationship between the finished quality (surface roughness Rz and improvement rate of Rz) and each parameter of the system, Vickers hardness of work piece and lapping head, lapping pressure, grain size, is investigated. Then, an intelligent lapping system is developed. Finally, the HPM31 are machined as confirmatory experiment by developed system with calculated lapping conditions. It is concluded from the result that: (1) The relationship between the surface roughness and lapping parameter was cleared. (2) The intelligent lapping system using the lapping model was developed. (3) The estimated limit surface roughness and improvement rate by calculated condition satisfactorily agreed with the experimental results.

Źródło:

Journal of Machine Engineering; 2010, 10, 1; 5-12
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Preparation and Recycling of Carbon Containing Composites

Autorzy:

Zagórski, K.
Rusek, P.

Powiązania:

https://bibliotekanauki.pl/articles/99471.pdf

Data publikacji:

2013

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

carbon composites
machining
scrap recycling

Opis:

Composites based on anthracite grains and carbon scrap containing also two mirror components were investigated. A milling machine allowing cutting speeds in the 100-400mm/min range connected to a piezoelectric dynamometer and a video camera was used. The debris formed was screened through sieves and chips with sizes larger than 1 mm can be recycled. Cutting resistance of the composite depends on the local distribution of the carbon scrap phase.

Źródło:

Journal of Machine Engineering; 2013, 13, 4; 77-86
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Mathematical modelling of the laser machining process of sapphire crystal Al2O3

Autorzy:

Wyszyński, D.
Skoczypiec, S.
Furyk, K.

Powiązania:

https://bibliotekanauki.pl/articles/99499.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

laser beam machining
micromachining
sapphire

Opis:

The paper presents theoretical aspects concerning use of pulse laser source for precise machining of Al2O3 crystals for medical applications. The scheme of laser beam manipulation and the test stand has been presented. Application of the mathematical model enabled determination of values of basic sapphire machining parameters. Presented results give rough information about dynamics of the process and can be used for the test stand designing as well as determination of machining precision.

Źródło:

Journal of Machine Engineering; 2012, 12, 2; 20-28
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

A finite element model for abrasive waterjet machining

Autorzy:

Hassan, A. I.
Kosmol, J.

Powiązania:

https://bibliotekanauki.pl/articles/279301.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

waterjet machining
finite element method

Opis:

This paper presents a first attempt to model abrasive waterjet (AWJM) machining process using the powerful tool of the finite element method (FEM) in order to explain the abrasive particle-workpiece interaction. The new model takes into account precise representation of the constitutive behaviour of the workpiece material under AWJ dynamic loading conditions which was ignored in previous AWJM models. In the present model, forces acting on the abrasive particle need not be initially determined, as in previous AWJM studies, as they are automatically calculated at each time step. The results show that the finite element method is a useful tool in predicting abrasive-material interaction and AWJ depth of cut.
Modelowanie obróbki strumieniem wodnościernym metodą elementów skończonych. W artykule przedstawiono pierwsze podejście do modelowania obróbki strumieniem wodnościernym metodą elementów skończonych. Celem badań jest próba wyjaśnienia zjawisk występujących na styku ścierniwa i przedmiotu obrabianego. Ten nowy model w sposób precyzyjniejszy uwzględnia właściwości materiału poddanego dynamicznym obciążeniom, co we wcześniejszych modelach nie było uwzględniane. W modelu tym nie trzeba definiować początkowej siły działającej na ścierniwo (jak to miało miejsce w poprzednich modelach), ponieważ jest ona automatycznie obliczana w każdym kroku czasowym. Wyniki symulacji pokazują, że MES jest bardzo dobrym narzędziem do przewidywania reakcji pomiędzy ścierniwem i przedmiotem obrabianym oraz głębokości skrawania.

Źródło:

Journal of Theoretical and Applied Mechanics; 2000, 38, 4; 957-968
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Surface quality control of Al2O3 specimens after lapping

Autorzy:

Molenda, J.

Powiązania:

https://bibliotekanauki.pl/articles/243823.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

lapping
surface quality
ceramic machining

Opis:

The finishing processes are an important perspective to be considered today to meet the goals like parallelism, tolerances, flatness and smooth surface of workpieces. These processes are high-precision abrasive processes. A leading importance in this perspective has the lapping process. It leads to a surface with low roughness and high precision. This paper reports the results of surface analysis of sealing elements made of oxide ceramic Al2O3. Because of elements, application as sealing parts in water valves, high surface quality and flatness is required. To meet those requirements grinding and lapping were execute. The first was realized by elements manufacturer, the second – during experiments. Research was carried out on a plate-lapping machine ABRALAP 380 with a grooved cast-iron lapping plate and three conditioning rings. As abrasive material boron carbide was use. Surface quality was investigated firstly after grinding and then, after lapping. A Hommeltester T8000-R60 profilometer with a resolution of 0.01 μm was used. The surface roughness parameters Ra and Rk were studied in the light of varying lapping parameters, like grains size, lapping pressure, velocity and time. According to literature, those are the most extensively used parameters for describing the surface roughness after finishing processes. Additionally the Abbot Firestone curves were analysed.

Źródło:

Journal of KONES; 2016, 23, 3; 337-343
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Przykłady innowacyjnego wykorzystania precyzyjnych obrabiarek ECM
Examples of precise ECM machine-tools innovative applications

Autorzy:

Dąbrowski, L.
Keller, R.
Tomczak, J.

Powiązania:

https://bibliotekanauki.pl/articles/270095.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

precyzyjna obróbka elektrochemiczna
obróbka impulsowa
ECM
aplikacje
electrochemical precision machining
pulse machining
application

Opis:

W artykule przedstawiono przykłady wykorzystania precyzyjnych obrabiarek realizujących obróbkę elektrochemiczną, zwłaszcza szeroko rozumianych materiałów trudno obrabialnych. W prezentacji, oprócz obrabiarek uwzględniono także oprzyrządowanie oraz urządzenia pomocnicze, np. do przygotowania i filtrowania elektrolitu, mycia wstępnego i końcowego. Takie kompleksowe ujęcie zagadnienia pozwala uzyskać bardzo dużą dokładność wykonania i gładkość powierzchni po obróbce. Opracowania dokonano na przykładzie wybranych obrabiarek, zapewniających niezawodność produkcji na najwyższym poziomie, przede wszystkim w branży lotniczej i motoryzacyjnej.
In this paper examples of precise ECM machine-tools innovative applications, particularly for machining almost unworkable materials, were described. In presentation, besides machine-tools tooling and auxiliary devices, e.g. for electrolyte preparation and filtering, initial and final washing were included. Such complex approach of problem makes possible to get great accuracy of machining and small machined surface roughness. Elaborate was worked out on example of selected machine tools.

Źródło:

Inżynieria Maszyn; 2011, R. 16, z. 4; 129-138
1426-708X

Pojawia się w:

Inżynieria Maszyn

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Study on Tool Condition Parameters Intended for Smart Tool Management in Filleted End Milling

Autorzy:

Sekine, Tsutomu

Powiązania:

https://bibliotekanauki.pl/articles/2123284.pdf

Data publikacji:

2021

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

optimization
multi-axis CNC machining
filleted end mill
tool condition parameter
machining conditions

Opis:

Filleted end milling is commonly used as a versatile manufacturing process, whereas the optimization for tool condition management is one of the continuously noticed topics. It can also contribute to the achievement of Sustainable Development Goals. A lot of outcomes have been reported so far in the experimental investigations of tool condition parameters. However, the findings and knowledge from theoretical perspective are relatively scarce to advance smart tool management. Hence, the aim of this study is to give theoretical consideration with tool condition parameters. The investigations focus on filleted end milling with some variations of machining conditions. Several tool condition parameters were theoretically proposed after illustrating geometrical modeling with variable description. Then, the demonstrations and discussion were made based on the computational results in filleted end milling. The results visually and numerically ascertained novel findings regarding several characteristics of tool condition parameters

Źródło:

Advances in Science and Technology. Research Journal; 2021, 15, 3; 108--116
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Application of laser and electrochemical interaction in sequential and hybrid micromachining processes

Autorzy:

Skoczypiec, S.

Powiązania:

https://bibliotekanauki.pl/articles/201232.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

laser beam
electrochemical machining
hybrid machining processes
promień lasera
obróbka elektrochemiczna
obróbka hybrydowa

Opis:

One of the research and development trends in nowadays manufacturing technology is integration of different manufacturing techniques into single machine tool. In the first part of the paper possibilities, goals, reasons and advantages of thermal and electrochemical interaction have been characterized. As literature review indicates such a connection can be realized as sequential or hybrid machining. The second part of the paper focuses on detailed analysis of laser assisted electrochemical process. For this purpose, the mathematical model of workpiece heating has been developed. Based on obtained results and literature review possibilities of technical realization and potential application have been discussed.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2015, 63, 1; 305-314
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

On-Machine Measurement Systems for High-Precision Workpieces, Produced on Five-Axis Milling Machines

Autorzy:

Zeleny, J.
Janda, M.

Powiązania:

https://bibliotekanauki.pl/articles/971102.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machining
accuracy
on-machine measuring

Opis:

The paper describes control systems for measuring of complex workpieces machined on numerically controlled machine tools. The area is called "on-machine measurement" (OMM) and means measuring of workpieces still placed in the working space of the NC machine immediately after the NC machining operation. Measuring is performed by a touch probe inserted into the machine spindle and the movements of the probe are programmed to touch the workpiece in pre-selected points of machined surface. This makes it possible to compare the measured points with corresponding points of the CAD model and thus evaluate deviations in the normal direction between the ideal and real surfaces. In the RCMT - Research Center of Manufacturing Technology in Prague, the research of on-machine measurement methods has been performed with the aim to apply this technology for measuring of very precise and complex workpieces, produced on five-axis milling machines. Different types of control systems for three-axis, five-axis and "three and two" axis on-machine measurements have been analysed, verified and tested. The task has been solved as a part of the HARDPRECISION European project with the aim to verify possibilities in replacing application of conventional coordinate measuring machines (CMM) by on-machine measurements methods even for very complex parts with hardly accessible measured surfaces.

Źródło:

Journal of Machine Engineering; 2008, 8, 1; 11-18
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Precise model of HSC Machining Centre for aerospace parts machining

Autorzy:

Jedrzejewski, J.
Kwasny, W.
Kowal, Z.
Modrzycki, W.

Powiązania:

https://bibliotekanauki.pl/articles/1429344.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machining centre
model
aerospace
precision

Opis:

This article shows the aspects of precise modelling of precise High-speed Machining Centres for High-Speed Cutting (HSC) of parts used in the aerospace industry. The main focus was made on the thermal errors having a dominant influence on the precision of machining. Main assumptions for a hybrid thermal model of a centre thermal behaviour have been stated, taking into account the characteristics of heat sources. On the example of a 3-axis machining centre, measured runs of heating up and heat displacements have been shown, compared to these determined with the use of simulations of a behaviour in assumed working conditions. A special attention was drawn to the phenomena taking place in motorspindles, as well as to the displacements of a spindle face during high rotational speeds of spindles and step changes of rotational speeds. The significance and influence of the bearing preload and centrifugal forces on the spindle axial displacements was shown, which is decisive on the precision of part machining. Additionally, it was shown that the important component of a machining error is an error of spindle position identification by means of a linear encoder, resulting from the thermal deformation of a centre body, to which a quartz linear encoder is fixed.

Źródło:

Journal of Machine Engineering; 2008, 8, 3; 29-41
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Influence of surface textures produced by finishing operations on their functional properties

Autorzy:

Grzesik, W.

Powiązania:

https://bibliotekanauki.pl/articles/99816.pdf

Data publikacji:

2016

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machining
surface texture
functional performance

Opis:

This literature survey highlights the possible influences of surface roughness parameters on functional properties of surfaces produced by different finishing operations. The prediction of such functional properties as fatigue, sealing capacity, adhesion, friction, wear and corrosion resistance based on five groups of spatial (S) roughness parameters is overviewed. In contrast, traditional approach based on 2D roughness parameters is provided. Some real 3D surface topographies produced with desired functional properties by finishing cutting and abrasive operations are characterized. This survey confirms the vital role of machined surfaces in the functionality of machine components.

Źródło:

Journal of Machine Engineering; 2016, 16, 1; 15-23
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

A study of low-frequency vibration-assisted bandsawing of metallic parts

Autorzy:

Tandler, Tobias
Stehle, Thomas
Möhring, Hans-Christian

Powiązania:

https://bibliotekanauki.pl/articles/24084667.pdf

Data publikacji:

2023

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

cutting process
machining
metal cutting

Opis:

Sawing is often the first work step in the metal cutting production chain. Especially for larger workpieces, bandsawing is used for this purpose. Nevertheless, studies on sawing have led a niche existence in the research landscape for a long time. However, as a result of the optimization of manufacturing processes in terms of economic efficiency, bandsawing is increasingly becoming the focus of research, since there are still saving potentials here. The aim of this paper is to investigate the extent to which the bandsawing process can be influenced by active, low-frequency vibration superimposition in the feed direction. First, analogue tests were carried out and parameter combinations were determined which have a positive influence on the process. Subsequently, these parameter combinations were investigated on a real sawing machine with an excitation unit, analysing the extent to which the results from the analogue tests could be transferred to the real process.

Źródło:

Journal of Machine Engineering; 2023, 23, 2; 110-122
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Preliminary evaluation of the applicability of F, V and AEsignals in diagnosis of ADI machining process

Autorzy:

Myszka, D.
Bombiński, S.

Powiązania:

https://bibliotekanauki.pl/articles/381921.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

austempered ductile iron
machining
diagnosis
ADI machining process
żeliwo sferoidalne
obróbka
diagnostyka
obróbka ADI

Opis:

In this study, a preliminary evaluation was made of the applicability of the signals of the cutting forces, vibration and acoustic emission in diagnosis of the hardness and microstructure of ausferritic ductile iron and tool edge wear rate during its machining. Tests were performed on pearlitic-ferritic ductile iron and on three types of ausferritic ductile iron obtained by austempering at 400, 370 and 320°C for 180 minutes. Signals of the cutting forces (F), vibration (V) and acoustic emission (AE) were registered while milling each type of the cast iron with a milling cutter at different degrees of wear. Based on individual signals from all the sensors, numerous measures were determined such as e.g. the average or maximum signal value. It was found that different measures from all the sensors tested depended on the microstructure and hardness of the examined material, and on the tool condition. Knowing hardness of the material and the cutting tool edge condition, it is possible to determine the structure of the material .Simultaneous diagnosis of microstructure, hardness, and the tool condition is probably feasible, but it would require the application of a diagnostic strategy based on the integration of numerous measures, e.g. using neural networks.

Źródło:

Archives of Foundry Engineering; 2014, 14, 1; 91-96
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

On Micromachining with a Focus on Miniature Gears by Non Conventional Processes. A Status Report

Autorzy:

Chaudhary, T.
Siddiquee, A. N.
Chanda, A. K.
Khan, Z. A.

Powiązania:

https://bibliotekanauki.pl/articles/139762.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

wire electrical discharge machining
WEDM
electrochemical machining
ECM
micro-electrical discharge machining
micro-EDM
wycinanie elektroerozyjne
obróbka elektrochemiczna
mikroobróbka elektroerozyjna
mikro-EDM

Opis:

Recent developments in automation and technology have revolutionized the way products are made. It is directly seen in the evolution of part miniaturization in the sectors such as aerospace, electronics, biomedicine and medical implants. Micromachining is a promising technology to fulfill the need of miniaturization. A review has been done on the micromachining processes such as micro electric discharge machining (micro-EDM) and wire EDM (WEDM), micro electrochemical machining (micro-ECM). Recent literature were studied and categorized in terms of materials, process parameters, performances, product manufactured, and miniature product generation. Starting with brief introduction to micromachining, classifications and applications, technical aspects of discussions from the literature have been presented on key factors such as parameters and the response variables. Important aspects of recast layer, heat effected zone, micro-hardness, micro cracks, residual stress, etc., have been given. A special focus is given to the status of the research on microgear manufacturing. Comparison has been made between other conventional process suitable for micro-gear manufacturing and WEDM. The miniature gear machined by WEDM shows the defect-free microstructure, better surface finish, thin recast layer and improved gear quality parameters such as profile and pitch. Finally, the research gaps and future research directions have been presented.

Źródło:

Archive of Mechanical Engineering; 2018, LXV, 1; 129-169
0004-0738

Pojawia się w:

Archive of Mechanical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Some aspects of electrochemical machining process modeling and applications
Wybrane zagadnienia modelowania i praktycznego zastosowania procesu obróbki elektrochemicznej

Autorzy:

Ruszaj, A.

Powiązania:

https://bibliotekanauki.pl/articles/176245.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

electrochemical machining
mathematical modeling
electrochemical machining applications
obróbka elektrochemiczna
modelowanie matematyczne
zastosowanie obróbki elektrochemicznej

Opis:

Electrochemical machining process (ECM) can be applied for shaping advanced materials which are difficult or impossible for machining using conventional methods. In electrochemical machining the workpiece is an anode and material is removed as a result of electrochemical reactions “atom” by “atom”, without mechanical forces. This mechanism of material removal makes it possible to obtain high quality of machined surface layer with uniform properties. Very important advantage of ECM process is also the fact that there is no electrode – tool wear because the equivalent reaction to anodic dissolution is hydrogen generation on cathode surface and hydrogen can be easy removed from interelectrode gap by electrolyte flow. Because of this advantages ECM process is dynamically developed. Some aspects of ECM process mathematical modeling and practical applications are presented in the paper, taking into account literature review and author’s own research.
Procesy obróbki elektrochemicznej (ECM) są stosowane do kształtowania wyrobów wykonanych z materiałów specjalnych przewodzących prąd elektryczny, trudnych lub niemożliwych do obróbki metodami konwencjonalnymi. W obróbce elektrochemicznej przedmiot obrabiany jest anodą i materiał jest usuwany w wyniku reakcji elektrochemicznych bez oddziaływania sił mechanicznych. Proces taki usuwania materiału umożliwia uzyskanie wysokiej jakości warstwy wierzchniej obrabianych wyrobów. Zaletą procesu ECM jest brak zużycia elektrody roboczej (narzędzia). Reakcją ekwiwalentną do reakcji anodowego roztwarzania jest bowiem wydzielanie się wodoru, łatwo usuwanego przez przepływający elektrolit. Stąd obecnie procesy ECM są dynamicznie rozwijane. W pracy przedstawiono niektóre problemy związane z matematycznym modelowaniem oraz aplikacją procesów ECM, z uwzględnieniem danych literaturowych i wyników badań własnych.

Źródło:

Advances in Manufacturing Science and Technology; 2017, 41, 4; 5-22
0137-4478

Pojawia się w:

Advances in Manufacturing Science and Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Frezotoczenie – hybrydowa obróbka skrawaniem
Rotating milling – hybrid machining

Autorzy:

Potrzebski, Marek
Styp-Rekowski, Michał
Świątek, Paweł
Świątek, Paweł Lech

Powiązania:

https://bibliotekanauki.pl/articles/1818871.pdf

Data publikacji:

2020

Wydawca:

Wydawnictwo AWART

Tematy:

frezowanie obrotowe
toczenie
frezowanie
wydajność obróbki
rotating milling
milling
turning
machining efficiency
machining accuracy

Opis:

W artykule w sposób syntetyczny przedstawiono frezotoczenie – niezbyt popularną ciągle metodę obróbki skrawaniem. Jest to obróbka hybrydowa stanowiąca połączenie tradycyjnych obróbek toczenia i frezowania. Przedstawiono jej zalety i wady. Przedstawiono także wyniki badań eksperymentalnych, które potwierdziły dużą przydatność frezotoczenia w praktyce przemysłowej. Jej pozytywną cechą jest wyraźnie większa efektywność obróbki w porównaniu do obróbek tradycyjnych, negatywną zaś – mniejsza dokładność. Ogranicza to w pewnym stopniu jej zastosowanie.
In this paper rotating milling – a not very popular method of machining is presented in a synthetic way. It is hybrid machining which combines traditional turning and milling operations. Its advantages and disadvantages are presented. The results of experimental research, which confirmed the great usefulness of rotating milling in industrial practice are also presented. Its positive feature is significantly better machining efficiency in comparison to traditional machining, while its negative feature is worse accuracy. This feature limits its use in some applications.

Źródło:

Obróbka Metalu; 2020, 1; 44--50
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Wpływ dodatku modyfikującego cechy płynu obróbkowego na zmianę temperatury w strefie kontaktu współpracujących powierzchni
Effect of treatment fluid modifier additive on temperature change in the contact zone of cooperating surfaces

Autorzy:

Mikołajczyk, Jarosław Robert

Powiązania:

https://bibliotekanauki.pl/articles/24200534.pdf

Data publikacji:

2023

Wydawca:

Wydawnictwo AWART

Tematy:

obróbka
narzędzie skrawające
zużycie krawędzi
płyn obróbkowy
machining
cutting tool
edge wear process
machining fluid

Opis:

W artykule przedstawiono rezultaty badań ukazujących wpływ dodatku eksploatacyjnego do płynu roboczego na temperaturę styku powierzchni współpracujących w węźle tarciowym. Stwierdzono zróżnicowany wpływ zależny od stężenia tego dodatku.
In this paper the results of studies showing the effect of the operating additive to the working fluid on the contact temperature of the cooperating surfaces in the friction pair were presented. Differentiated effects, depending on the concentration of the additive, were observed.

Źródło:

Obróbka Metalu; 2023, 2; 43--46
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Czas wykonania budowlanych elementów konstrukcji stalowych obrabianych metodą skrawania a parametry skrawania

Autorzy:

Całusiński, P.

Powiązania:

https://bibliotekanauki.pl/articles/2068392.pdf

Data publikacji:

2010

Wydawca:

Politechnika Częstochowska

Tematy:

konstrukcja budowlana
konstrukcja stalowa
obróbka wiórowa
skrawanie precyzyjne
building construction
steel construction
machining
precision machining

Opis:

Omówiono nową metodę wzrostu wydajności produkcji w procesie skrawania elementów stalowych. Przedstawiono systemy narzędzi dla precyzyjnego skrawania. Dane umieszczone w artykule dotyczą wykazu mocy dla różnych typów skrawania, w tym także dla precyzyjnego skrawania.
Text presents new method of increase of production capacity at processing of element of steel construction method machining cut. It presents tool systems and new constructions pinpoint cut. Data be placed in text about conscription of force for different types also pinpoint cut.

Źródło:

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo; 2010, 16 (166); 97-103
0860-7214

Pojawia się w:

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Processing With Parallel Kinematics - an Experimental Analysis

Autorzy:

Neugebauer, R.
Wabner, M.
Ihlenfeldt, S.

Powiązania:

https://bibliotekanauki.pl/articles/971120.pdf

Data publikacji:

2008

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machine tool
parallel kinematics
machining
milling

Opis:

This article summarizes experimental analyses for the determination of process parameters that can be achieved in an industrial machine tool with parallel kinematics. Focus is on the examination of the machining results' dependency on position and direction. Therefore milling experiments are conducted, testing different positions and directions within the workspace. Surface quality, process forces, acceleration as well as vibration characteristics of the working platform are assessed. Based on measured frequency responses the stability limits are determined at different locations within the workspace. By these examinations it can be confirmed that the dependency of static and dynamic machine properties on position and direction has an influence on machining results. Best results are achieved in central positions of the machine used for most of respective operations. Furthermore it's represented that the machining results are comparable to conventional serial machines though parallel kinematics show a stronger dependency on direction.

Źródło:

Journal of Machine Engineering; 2008, 8, 1; 54-62
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Issues in machining of hollow core honeycomb sandwich structures by abrasive waterjet machining

Autorzy:

Devadula, S.
Nicolescu, M.

Powiązania:

https://bibliotekanauki.pl/articles/99450.pdf

Data publikacji:

2013

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

abrasive waterjet
machining
honeycomb sandwich material

Opis:

Machining of hollow core honeycomb sandwich materials is a challenging job as the mechanical properties of various layers (skin, core) are quite dissimilar, and the conventional solid cutting tool experiences a sudden change of conditions while machining that might lead to damage on the tool/part. Although, abrasive waterjets (AWJs) is highly efficient in the machining of advanced composite materials due to their unique characteristics, efficient machining of sandwich structures by AWJs needs many challenges to be addressed. This work presents various issues observed in AWJ machining of carbon- and glass- fiber skin based, aluminum sandwich structure composite materials, and the limitations of AWJs in processing these exotic materials. Finally, possible strategies for efficient machining of honeycomb structures were proposed for future investigation.

Źródło:

Journal of Machine Engineering; 2013, 13, 1; 117-124
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Dependency of The Technological Quality of Elements Made From An Aluminum Alloy on Their Shape in The Water Jet Machining

Autorzy:

Wantuch, E.
Kudelski, R.
Nieciąg, H.

Powiązania:

https://bibliotekanauki.pl/articles/99513.pdf

Data publikacji:

2013

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

water jet
machining
quality
aluminum alloy

Opis:

The problem of the technological quality of elements is one of the primary problems of modern machine production. In many cases, elements are made from new construction materials with specific properties considered to have poor machinability in cases where conventional technologies are applied. Thus, there is a need to identify the capabilities of new technologies, including the technology of cutting with a high-pressure abrasive water jet for the production of elements made of Al alloys, while observing qualitative machining requirements. This paper presents the results of studies of the accuracy of production of elements with a complex shape made of a 2017A alloy (PA6) and of studies of the coarseness of obtained surfaces depending on the pressure of the water jet, cutting advance rate, and the amount of dosed abrasive for a constant thickness of the element. The measure of the accuracy of production, independent of dimensional accuracy, was assumed to be the size of chamfering on the side surface of the cut element caused by a specific mechanism of material decohesion occurring under the influence of water jet technology. In cases where Al alloys are cut, depending on assumed conditions, it is possible to shape the side surface of an element with a positive, negative, or neutral (zero) wall inclination (side of the element). In the process of cutting, specific errors in the shape of the element occur and appear on curved fragments of the object or in discontinuous areas of the profile (e.g. transition from a straight fragment to an arc fragment); this is caused by a shift in the exit of the high-pressure abrasive water jet from the object relative to the point of entry. Consequently, selection of cutting parameters for the water jet method for elements with complex shapes is, in essence, a compromise between the obtained inclination of the wall of the processed element and the required surface coarseness, and between the required (acceptable) inclination of the wall of the element or lack thereof and the obtained coarseness of the elements surface. Thus, in the outlined problem, it is not possible to simultaneously obtain two satisfactory criteria quantities of element quality, that is, accuracy of shape and requisite coarseness of the surface of the machined element, if the water jet method is applied for the purpose of machining Al alloys.

Źródło:

Journal of Machine Engineering; 2013, 13, 4; 35-46
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Influence of selected cutting conditions on cutting forces

Autorzy:

Görög, Á.
Stančeková, D.
Kapustová, M.
Görögová, I.
Miturska, I.

Powiązania:

https://bibliotekanauki.pl/articles/103369.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining
cutting forces
cutting speed
dynamometer

Opis:

The article presents achieved results of research focused on the influence of various factors modification on cutting forces at longitudinal turning of steel C 45 using two tools with different shape and geometry at constant values of feed and depth of cut. The individual components of cutting force were compared reciprocally, i. e. axial, radial, tangential and finally resulting cutting force depending on cutting speed.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 1; 179-185
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

Reduction of machining errors by CMM-CNC data feedback

Autorzy:

Stryczek, R.

Powiązania:

https://bibliotekanauki.pl/articles/114048.pdf

Data publikacji:

2015

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining error
error compensation
accuracy enhancement

Opis:

Needs and possibilities of the reduction of machining automation errors on the basis of the measurements of a workpiece which undergoes a multi-sided machining is presented in the paper. The article briefly shows various sources of machining errors and their reduction methods. The difficulties occurring when taking into account the CMM measurements results in the workshop environment are characterized. The examples of how the presented approach can be applied in practice is displayed.

Źródło:

Measurement Automation Monitoring; 2015, 61, 5; 154-157
2450-2855

Pojawia się w:

Measurement Automation Monitoring

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Investigation into electrochemical discharge machining of microholes

Autorzy:

Kudla, L.

Powiązania:

https://bibliotekanauki.pl/articles/384333.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

electrochemical discharge machining (ECDM)
micromachining
microholes

Opis:

The paper presents fundamentals and technology of electrochemical discharge machining (ECDM) of microholes in borosilicate glass and partly in diamond crystals. The both mentioned materials have very useful technical properties but are difficult to machine using conventional or even laser techniques. The ECDM gives another chance to reduce some machining problems under condition of precise selection and control of the process means.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 21-24
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

Assessment of the effectiveness of computer vision using the OpenCV package in finding the centre of a drilled hole in wood based materials

Autorzy:

Król, Patryk
Król, Katarzyna

Powiązania:

https://bibliotekanauki.pl/articles/2200143.pdf

Data publikacji:

2020

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

computer vision
wood-based panels
machining

Opis:

Assessment of the effectiveness of computer vision using the OpenCV package in finding the centre of a drilled hole in wood-based materials. Small diameter holes made in wood-based materials were scanned by non-professional scanning equipment and then analysed to determine the location of the hole. The quality of the hole centre estimation was evaluated by a survey of 21 people. It has been shown that the evaluation using the HoughCirlcles function has an error of less than 0.05 mm in 18 out of 28 cases.
Ocena skuteczności wizji komputerowej z wykorzystaniem pakietu OpenCV w znajdowaniu środka wierconego otworu w materiałach drewnopochodnych. Otwory o małej średnicy wykonane w materiałach drewnopochodnych zostały zeskanowane przez nieprofesjonalny sprzęt skanujący, a następnie przeanalizowane w celu określenia lokalizacji otworu. Jakość oszacowania środka otworu została oceniona w ankiecie przeprowadzonej wśród 21 osób. Wykazano, że ocena za pomocą funkcji HoughCirlcles ma błąd mniejszy niż 0,05 mm w 18 z 28 przypadków.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 111; 68--72
1898-5912

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

Wpływ chropowatości powierzchni po obróbce na jej cechy dekoracyjne i adhezyjne
Impact of surface roughness after treatment on its decorative and adhesive properties

Autorzy:

Kurenda, P.
Musiał, W.

Powiązania:

https://bibliotekanauki.pl/articles/313184.pdf

Data publikacji:

2017

Wydawca:

Instytut Naukowo-Wydawniczy "SPATIUM"

Tematy:

adhezja
obróbka
wygładzanie
adhesion
machining
polish

Opis:

W artykule przedstawiono badania wstępne prezentujące zależność między mikrostrukturą powierzchni nieukierunkowanych w skali mikro i makro. W tym celu posłużono się analizą topografii powierzchni z wykorzystaniem profilometru bezstykowego oraz przeprowadzono badanie adhezji (kąta zwilżania) próbki w celu określenia jak dany materiał o określonej mikrostrukturze wpływa na zmianę kąta zwilżania powierzchni. Kolejne etapy badań będą rozszerzone o dodatkowe eksperymenty umożliwiające określenie przydatności powierzchni nieobciążonych wykonanych ze stali nierdzewnej z uwzględnieniem łatwości ich czyszczenia w warunkach eksploatacyjnych oraz wpływu korozji na stan powierzchni i warstwy wierzchniej w trakcie ich eksploatacji.
The article presents preliminary studies presenting the relationship between microstructure of non-directional surfaces on the micro and macro scales. For this purpose, surface analysis was performed using a contactless profilometer and then an adhesion test (contact angle) of the selected sample was determined to determine how the material of a particular microstructure affected the change in the contact angle of the surface. Subsequent stages of research will be extended by additional experiments to determine the suitability of unloaded surfaces made of stainless steel, taking into account their ease of cleaning in service conditions and the effect of corrosion on the surface and surface layer during their use.

Źródło:

Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 7-8; 363-364
1509-5878
2450-7725

Pojawia się w:

Autobusy : technika, eksploatacja, systemy transportowe

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

The Possibility of Modeling Parts in Production Technology

Autorzy:

Ivanova, Tatyana N.
Korshunov, Aleksandr I.
Peterka, Jozef
Ratnikov, Ivan A.
Pokorny, Peter

Powiązania:

https://bibliotekanauki.pl/articles/2064854.pdf

Data publikacji:

2020

Wydawca:

STE GROUP

Tematy:

modelling
production technology
CAD/CAM
machining

Opis:

The object of the research is a part “Flange half of differential case”, which has complex shape of a housing. The subjects of the research are the processes of selection of analogue material, workpiece production method, and justification of the structural and technological parameters of a part, taking into account 3D-modeling of the structure, deformations, displacements, stresses, and safety factor. The selection of analogue material is connected with suspension of production of open-hearth steel grade Mst.6 GOST 380-50. The objectives of the work include juxtaposition of computer models of deformations, displacements, stresses, safety factors of the part made of different analogue materials; comparison of models according workpiece production methods with consideration of material utilization ratio, structural and technological features of resulting workpieces. For modelling we have chosen the several types of materials. Research on modelling processes was fulfilled by means of software of Kompasv17, Solid Works, Solid works simulation. Volumetric models of parts and workpieces for all studied materials have been created taking into account the deformations, displacements, stresses, and safety factor. There results of modelling of “Flange half of differential case” allowed us to make recommendations for production conditions. These recommendations include the use of steel 45 GOST 1050-2013 as analogue material, hot forging of a workpiece on a horizontal forging machine, creating of design and technological documentation for the manufacture of the part.

Źródło:

Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 359--373
2545-2827

Pojawia się w:

Multidisciplinary Aspects of Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Influence of the path type on selected technological effects in the trochoidal milling

Autorzy:

Waszczuk, K.
Karolczak, P.
Wiśniewska, M.
Kowalski, M.

Powiązania:

https://bibliotekanauki.pl/articles/103363.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

hard machining
trochoidal milling
tool path

Opis:

The article presents basic information about machining materials in hardened state – it particularly describes a method of the so called hard milling. The paper discusses strategies and methods in hard milling, presents trochoidal milling, its advantages and disadvantages. It also presents research methodology and effects which concerned determination of a tool path impact on selected technological effects after trochoidal milling of the groove.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 1; 147-153
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Ecological Aspects in the Process of Turning Cast Iron with Coated Tools

Autorzy:

Jenek, Mariusz
Ociepa, Michał
Woźniak, Waldemar
Vilamová, Šárka
Švecová, Eva

Powiązania:

https://bibliotekanauki.pl/articles/2174910.pdf

Data publikacji:

2022

Wydawca:

Politechnika Koszalińska. Wydawnictwo Uczelniane

Tematy:

machining
PVD coating
machine power consumption

Opis:

The article presents the research results on the influence of the PVD coating on the cutting tool on the surface roughness and energy consumption in the cast iron turning process. It was shown that using coated tools leads to obtaining a surface qualitatively corresponding to the ground surface and to reducing the power consumption of the machine tool. In addition, the process itself, carried out without a cooling and lubricating liquid, is more eco-friendly, as it excludes its use, disposal and negative environmental impact.

Źródło:

Rocznik Ochrona Środowiska; 2022, 24; 360--370
1506-218X

Pojawia się w:

Rocznik Ochrona Środowiska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

A New Strategy of Tool Path Planning Based on Hydrodynamic Data to Machine Marine Propeller

Autorzy:

Breteau, T.
Damay, T.
Duc, E.
Hascoët, J.-Y.

Powiązania:

https://bibliotekanauki.pl/articles/971234.pdf

Data publikacji:

2009

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

propeller
tool path planning
machining methodology

Opis:

Marine propellers are complex surfaces that are usually machined with a perfect roughness in order not to disturb the theoretical flow. Because this requirement is penalizing from a manufacturing point of view, the global objective of the study is to propose an approach in which the machining parameters are linked to functional properties of the blade in order to remove the polishing phase. To reach this objective, hydrodynamic data are used: streak lines, that are computed during the propeller design phase, characterize the fluid behavior at the close vicinity of the blade. Those lines, which are theoretically continuous at the leading edge, turn out to be discontinuous, due to the computing method. To be consistent with the fluid behavior as much as possible, the idea presented in the paper is to compose a continuous trajectory, especially at the leading edge, to mill the surface. Thus, an algorithm is developed to plan tool paths which are smoothed at leading edge using Bezier curves. Moreover, this algorithm allows to quantify the cusp height at the leading edge to avoid a drop in performance using criteria linked to the dynamical behavior of a five axis machine tool. In this work, a strategy is developed and enables multiaxial milling of a blade surface by using geometric and hydrodynamic data and by respecting the associated constraints.

Źródło:

Journal of Machine Engineering; 2009, 9, 1; 29-40
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Electrode tool designing in the ECM machining for curvilinear surfaces

Autorzy:

Paczkowski, T.
Zdrojewski, J.

Powiązania:

https://bibliotekanauki.pl/articles/99678.pdf

Data publikacji:

2010

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

computer simulation
electrochemical machining
electrolyte flow

Opis:

Electrochemical machining with the use of a tool electrode (ECM.S) is one of the basic and most widely used electrochemical technological operations for machining tools and machine parts. This article presents a method of approximating the surfaces with electrode designing curves, with an assumed two dimensional electrolyte flow model in the inter-electrolyte gap. An example of calculations is also presented.

Źródło:

Journal of Machine Engineering; 2010, 10, 1; 58-69
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Adaptive control of ECM curvilinear surfaces

Autorzy:

Paczkowski, T.
Zdrojewski, J.

Powiązania:

https://bibliotekanauki.pl/articles/100210.pdf

Data publikacji:

2010

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

computer simulation
electrochemical machining
adaptive control

Opis:

Electrochemical machining (ECM) of curvilinear surfaces is one of the most basic and widely spread among electrochemical technology procedures for machine and tool parts. Constant parameters for preset machining time are hard to determine in this technology. This article presents a method of creating controlling code for ECM processing for which machining parameters changing over time are determined in a computer simulation of the process. An example of carrying out calculations, leading to determining process controlling code for preset electrode surfaces, is also presented, as well as the outcome of experimental verification.

Źródło:

Journal of Machine Engineering; 2010, 10, 4; 66-75
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Timber cross-cutting accuracy obtained with an automatic saw

Autorzy:

Nieciąg, Szymon
Pałubicki, Bartosz
Wilkowski, Jacek
Rogoziński, Tomasz

Powiązania:

https://bibliotekanauki.pl/articles/24072321.pdf

Data publikacji:

2019

Wydawca:

Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie

Tematy:

sawing
cross-cutting accuracy
wood machining

Opis:

Timber cross-cutting accuracy obtained with an automatic saw. The aim of this study was to verify the accuracy of cross-cutting of Scots Pine timber with use of optimization cross-cut saw Salvador Supercut 500. An influence of nominal element length and thru-feed speed was examined and analyzed with statistical methods.
Dokładność cięcia poprzecznego drewna na pilarce automatycznej. Celem niniejszej pracy była weryfikacja dokładności cięcia poprzecznego drewna sosny zwyczajnej za pomocą optymalizerki Salvador Supercut 500. Zbadano wpływ nominalnej długości elementów i prędkości przesuwu oraz przeanalizowano uzyskane wyniki metodami statystycznymi.

Źródło:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2019, 107; 80--83
1898-5912

Pojawia się w:

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Prediction of Surface Roughness based on the Machining Conditions with the Effect of Machining Stability

Autorzy:

Lin, Yung-Chih
Chen, You-Chen
Wu, Kung-Da
Hung, Jui-Pin

Powiązania:

https://bibliotekanauki.pl/articles/102332.pdf

Data publikacji:

2020

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining conditions
machining stability
regression analysis
surface roughness
warunki obróbki
stabilność obróbki
analiza regresji
chropowatość powierzchni

Opis:

This study was aimed at analyzing the influence of the cutting parameters (spindle speed, feed rate and cutting depth) on the surface roughness of the machined parts with the influence of the machining stability of the cutter. In order to consider the chattering effect, the machining stabilities were calculated based on the measured tool tip frequency response functions. A series of machining tests were conducted on aluminum workpieces under different cutting parameters. Then, the surface roughness prediction models in the form of nonlinear quadratic and power-law functions were established based on the multivariable regression method, in which the input parameters, cutting depth and spindle speed, were respectively defined in the stable and unstable regions, according to the stability lobes diagram. The current results show that both models built with the cutting parameters defined in stable regions demonstrate higher prediction accuracy of the surface roughness, about 90%, when compared with the models defined in full regions with the accuracy of about 80%. In particular, the power-law model is proven to have 90% prediction accuracy when validated with the cutting parameters in a stable region. As a conclusion, the mathematical models based on the cutting parameters with well-defined machining stability were proven to show more accurate prediction ability of the surface roughness. It could be expected that the prediction model can further be applied to optimize the machining conditions in low speed roughing and high speed finishing process with desirable surface quality.

Źródło:

Advances in Science and Technology. Research Journal; 2020, 14, 2; 171-183
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

Niekonwencjonalne metody cięcia we współczesnych procesach wytwórczych
Non-conventional cutting methods in the current manufacturing processes

Autorzy:

Styp-Rekowski, Michał
Oborsky, Ivan L.
Polishchuk, Oleg

Powiązania:

https://bibliotekanauki.pl/articles/2204839.pdf

Data publikacji:

2022

Wydawca:

Wydawnictwo AWART

Tematy:

cięcie
wykrawanie
cięcie erozyjne
AWJM
obróbka skrawaniem
obróbka WEDM
cutting
punching
erosive cutting
machining
WEDM machining

Opis:

W artykule przedstawiono niekonwencjonalne metody przecinania materiałów konstrukcyjnych realizowanych we współczesnych procesach wytwarzania. Do tej grupy zaliczono przecinanie strugą wodną i wodno-ścierną a także przecinanie elektroerozyjne. Wskazano cechy pozytywne tych metod oraz kryteria jakimi powinno kierować się przy wyborze najlepszego sposobu przecinania.
In this paper unconventional methods for cutting construction materials that are realized in modern manufacturing processes were presented. This includes cutting with water and abrasive-water jets and erosion treatment. It shall indicate their positive features and the criteria according to which the method should be selected.

Źródło:

Obróbka Metalu; 2022, 3; 54--59
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

Mathematical Modeling of Material Erosion During the Electrical Discharge

Autorzy:

Gulbinowicz, Zbigniew
Goroch, Olgierd
Skoczylas, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/103392.pdf

Data publikacji:

2020

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

rotary electrical discharge machining
rotary electrochemical arc/discharge machining
rotacyjna obróbka elektroerozyjna
rotacyjna elektrochemiczna obróbka łukowa/wyładowcza

Opis:

The main factors in Electro Discharge Machining (EDM) are the material removal rate and the relative electrode-tool wear. The material removal rate and the relative electrode-tool wear depend on many parameters, in particular on the parameter of electrical discharge and the properties of electrode materials. The developed mathematical model describes the relationship between the parameters of material removal from electrodes and machining parameters. In order to estimate the volume of material removed from electrode, a mathematical model of erosion for single electrical discharge was applied. Estimation of material removal was determined using energy balance. The experimental results confirm the validity of the developed mathematical model.

Źródło:

Advances in Science and Technology. Research Journal; 2020, 14, 2; 27-33
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Ensuring economic efficiency of flexible fixtures in multiproduct manufacturing

Autorzy:

Ivanov, Vitalii.
Liaposhchenko, Oleksandr
Denysenko, Yuliia
Pavlenko, Ivan

Powiązania:

https://bibliotekanauki.pl/articles/1818972.pdf

Data publikacji:

2021

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

flexible manufacturing
fixture design
multiaxis machining
cost of machining
elastyczna produkcja
projekt oprawy
obróbka skrawaniem
koszty obróbki

Opis:

The first-priority directions for modern engineering, especially for multiproduct manufacturing, include the intensification of manufacturing processes, increasing the efficiency of technological equipment, and reducing the time required to implement technological solutions. Fixture design is a complicated and time-consuming process that requires considering many parameters of the closed-loop technological system “machine tool — fixture — cutting tool — workpiece”. One machined part can have several fixture layouts corresponding to all specified parameters; however, their effectiveness differs depending on production conditions. Search for an optimal fixture for specified production conditions is an essential stage of production planning. It has been proved that the efficiency of a manufacturing process should be assessed using single economic indicator — the cost of machining, which considers the costs of time, the total costs for process realisation, and a batch of parts. The paper aims to substantiate the efficiency of manufacturing processes in machining complex parts using flexible fixtures by developing a mathematical model that considers the cost of time, the cost of implementing the manufacturing process, and the batch value of parts production. This approach estimates the efficiency of manufacturing processes for machining complex parts and choosing the flexible fixture layout that corresponds to specific production conditions. It was proved that flexible fixtures could be effectively used for machining small batches of parts with frequent readjustments to new workpieces and short-term machining. A tendency has been established that the higher number of nomenclature of parts contributes to expanding the scope of the effective use of flexible fixtures.

Źródło:

Engineering Management in Production and Services; 2021, 13, 1; 53--62
2543-6597
2543-912X

Pojawia się w:

Engineering Management in Production and Services

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 58.

Tytuł:

Energy and Carbon Footprint Analysis for Machiningtitanium Ti-6Al-4V Alloy

Autorzy:

Rajemi, M. F.
Mativenga, P. T.
Jaffery, S. I.

Powiązania:

https://bibliotekanauki.pl/articles/971220.pdf

Data publikacji:

2009

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

energy footprin
energy carbon
machining
sustainable manufacturing

Opis:

Titanium alloys are increasingly being used in manufacturing especially in aerospace industries. The environmental impact of using this material is rarely discussed especially with regards to energy consumption and its contribution to carbon emissions. The poor machinability of titanium leads to lower material removal rate and longer machining time. Coupled with high carbon footprints encountered, in extracting this material from ore, it is clear that the environmental impact of using this material needs to be optimised. In the research reported here, cutting tests were undertaken on a lathe and milling machine using unified cutting conditions. The associated energy and carbon footprints were analysed and discussed with emphasis on high speed machining. The paper clearly shows the impact of process choice and cutting speed on environmental footprints as a key performance measure in sustainable manufacturing.

Źródło:

Journal of Machine Engineering; 2009, 9, 1; 103-112
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

High Performance Manufacturing Development Strategies in Aviation Industry

Autorzy:

Adamski, W.

Powiązania:

https://bibliotekanauki.pl/articles/971248.pdf

Data publikacji:

2009

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

perspective technologies
manufacturing
simulation
High Speed Machining

Opis:

Foresight. as modern planning tool. "Clean Sky" project will effect in creating new technologies, which usage in aviation will improve fast progress of technique. The paper indicates the newest technologies or technologies which will develop in about 25 years. Aircraft industry future technologies for Polish conditions have been discussed. List of perspective technologies for aviation and engineering industry has been described. These technologies may be developed in Poland to increase economy competitiveness. New revolutionary materials for aviation industry have been presented. Machine tool technologies, especially Computer Numerical Control (CNC), High Speed Machining (HSM) have emerged as effective mechanisms in the aerospace, automotive, and die and mould industries. These new technologies are attractive for competitive manufacturing because of their technical advantages, i.e. a significant reduction in lead-time, high product accuracy, and good surface finish. However, HSM not only stimulates advancements in cutting tools and materials, it also demands increasingly sophisticated CAD/CAM software, and powerful CNC controllers that require more supportive technologies. This paper describes the computational requirement and cutting parameters of HSM, look ahead programming and simulation.

Źródło:

Journal of Machine Engineering; 2009, 9, 4; 5-25
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 60.

Tytuł:

Operational modal analysis during milling of workpiece, fixed on a stiffness controllable joint

Autorzy:

Osterlind, T.
Frangoudis, C.
Archenti, A.

Powiązania:

https://bibliotekanauki.pl/articles/99628.pdf

Data publikacji:

2013

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machine tool
operational modal analysis
machining stability

Opis:

Vibration in metal cutting processes has been studied to a great extent resulting in for instance stability lobe diagrams under which stable machining parameters can be selected. One limitation of accurately estimated stability diagrams is the change in process and dynamic characteristics of the machine tool under operation. The machine tool dynamic response is often analysed with experimental modal analysis under off operational conditions. One drawback with this approach is the large number of measurements required to fully describe a machine tool and workpiece in different positions and time of machining. Another drawback is that the change of dynamiccharacteristics under operation is excluded. Operational modal analysis has been applied in machining under different conditions resulting in successfully improved stability lobe prediction. This research includes operational modal analysis of the workpiece, fixed on a stiffness controllable joint and stability prediction to stress the importance of various machining conditions.

Źródło:

Journal of Machine Engineering; 2013, 13, 2; 69-78
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Active alignment chuck for ultra-precision machining

Autorzy:

Daghini, L.
Archenti, A.
Rashid, A.
Nicolescu, C. M.

Powiązania:

https://bibliotekanauki.pl/articles/99849.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

ultraprecision machining
high damping interface
active alignment

Opis:

Ultraprecision (UP) components have become common in everyday life products such as mobile phones or compact high resolution digital cameras. Thus the need of producing such components with high accuracy and low production cost. UP machine tools are capable of extremely high accuracy in tool positioning but still today the workpiece is positioned by hand, hence the high production cost of UP components. A fully automated chain of production has been developed within the EU-IP project "Production 4 micro". This paper describes the active alignment chuck for workholding in UP machining. The chuck has been provided with a high damping interface (HDI) and to evaluate its efficiency the chuck has undergone an experimenta modal analysis (EMA) as well as machining tests. The chosen operation was grooving by fly cutting using a diamond tool. The EMA showed that the HDI was effective for those modes where there was relative displacement between one side and the other of the HDI. This result was confirmed by the machining tests as well. The HDI resulted being effective in damping high frequency modes (around 4 - 5 kHz), hence one expected benefit would be a longer tool life.

Źródło:

Journal of Machine Engineering; 2011, 11, 4; 39-48
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 62.

Tytuł:

Investigation of the shape accuracy of cylindrical holes machined by EDM process

Autorzy:

Spadło, S.
Dudek, D.

Powiązania:

https://bibliotekanauki.pl/articles/99888.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

electrical discharge machining
hole drilling
shape accuracy

Opis:

The paper deals with the investigations of influence parameters of electrodischarge machining (EDM) on the shape accuracy of holes machined by EDM process. BP-95. machine with electronic generator type was used to perform EDM process. Kerosene was used as a dielectric. During EDM process the parameters of current were permanent. The shape of electrode and way of passing dielectric were changed. The following parameters were determined: productivity of EDM process and shape accuracy of the drilling holes. The accuracy of bored cylindrical holes, is highest in case of hollowing out with the tubular electrode and for sucking out working liquid by her inner life. In the case of hollowing out with the electrode tubular, sinking the tube with pumping liquid by the inner life is the most favourable method causing the smallest mistakes of outlines of the cylindrically shape. The time of boring the arterial hole is shortest in case of hollowing out with the electrode tubular and for pumping working liquid by inside.

Źródło:

Journal of Machine Engineering; 2012, 12, 2; 98-104
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 63.

Tytuł:

Intelligent machining: real-time tool condition monitoring and intelligent adaptive control systems

Autorzy:

Hassan, M.
Sadek, A.
Attia, M. H.
Thomson, V.

Powiązania:

https://bibliotekanauki.pl/articles/99921.pdf

Data publikacji:

2018

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

adaptive control
tool condition monitoring
intelligent machining

Opis:

Unmanned manufacturing systems has recently gained great interest due to the ever increasing requirements of optimized machining for the realization of the fourth industrial revolution in manufacturing ‘Industry 4.0’. Real-time tool condition monitoring (TCM) and adaptive control (AC) machining system are essential technologies to achieve the required industrial competitive advantage, in terms of reducing cost, increasing productivity, improving quality, and preventing damage to the machined part. New AC systems aim at controlling the process parameters, based on estimating the effects of the sensed real-time machining load on the tool and part integrity. Such an aspect cannot be directly monitored during the machining operation in an industrial environment, which necessitates developing new intelligent model-based process controllers. The new generations of TCM systems target accurate detection of systematic tool wear growth, as well as the prediction of sudden tool failure before damage to the part takes place. This requires applying advanced signal processing techniques to multi-sensor feedback signals, in addition to using ultra-high speed controllers to facilitate robust online decision making within the very short time span (in the order of 10 ms) for high speed machining processes. The development of new generations of Intelligent AC and TCM systems involves developing robust and swift communication of such systems with the CNC machine controller. However, further research is needed to develop the industrial internet of things (IIOT) readiness of such systems, which provides a tremendous potential for increased process reliability, efficiency and sustainability.

Źródło:

Journal of Machine Engineering; 2018, 18, 1; 5-17
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 64.

Tytuł:

Process factors of impact on OEE for lathes for machining of wheelset

Autorzy:

Stryczek, R.
Szczepka, W.

Powiązania:

https://bibliotekanauki.pl/articles/100007.pdf

Data publikacji:

2016

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

wheelset machining
optimization
friction drive
adaptive control

Opis:

Lathes for machining of wheelsets are the specific class of production means, for which the maintaining of satisfactorily high value of coefficient of overall equipment effectiveness (OEE) is very difficult and depends on many different factors. In this study it has been focused on the process factors which influence shaping of OEE for this group of lathes. These include: optimizing the geometry of the wheel flange, identifying and optimization of partition of machining allowance, segmentation and parameterization of machining programs, adaptive control of roughing as well as detecting and reducing of occurrence of slippage between the drive rollers and the machined wheel. A particularly difficult problem is to detect and avoid slippage of drive rollers at the moment of stopping of the machined wheelset, as a result of occurrence of excessive cutting resistances. In the study it has been presented a new method for detecting of slippage and reacting through synchronous actions, to the occurrence of slippage in the friction drive lathes. The method described in this work has been implemented in real industrial conditions.

Źródło:

Journal of Machine Engineering; 2016, 16, 3; 126-140
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 65.

Tytuł:

Properties of the subsurface layer after rolling burnishing of an initially milled aluminium alloy

Autorzy:

Kalisz, J.
Grzesik, W.
Zak, K.
Czechowski, K.

Powiązania:

https://bibliotekanauki.pl/articles/100127.pdf

Data publikacji:

2017

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

aluminium
milling
burnishing
hybrid machining
subsurface layer

Opis:

This paper characterizes mechanical properties of the technological subsurface layer produced by medium milling of EM AW-AlCu4MgSi(A) aluminium alloy in hardened state T451 using a ball-end cutter and subsequent roller burnishing using a nitride ceramic ball. It was revealed that ball burnishing operations performed on curvilinear milled surfaces allow obtaining the subsurface layer with a minimum strain-hardening effect and induced compressive residual stresses without visible microstructural changes. As a result, such functional properties of the subsurface layer as fatigue strength, bearing properties and contact strength along with a very smooth machined surface of the Sa roughness of about 0.02 µm can be ensured.

Źródło:

Journal of Machine Engineering; 2017, 17, 3; 66-74
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 66.

Tytuł:

Wear evaluation of CVD diamond coated high-performance drilling tools for machining of carbon fiber reinforced plastics (CFRP)

Autorzy:

Uhlmann, Eckart
Reimers, Walter
Hinzmann, Daniel
Christiansen, Gerret
Böttcher, Katrin

Powiązania:

https://bibliotekanauki.pl/articles/100175.pdf

Data publikacji:

2020

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

CVD diamond
coated tools
CFRP machining
drilling

Opis:

The application of carbon fiber reinforced plastics (CFRP) as lightweight construction material in aerospace industry is based on the favorable weight-to-strength ratio. But the inherent material properties pose great challenges for the tool- as well as the manufacturing industry. In terms of economic industrial production processes, the quality of machined workpieces exhibits poor reproducibility combined with high tool wear. For this purpose, high-performance drilling tools with different CVD diamond coatings and carbide substrates with varying binder content were tested and analyzed in order to assess coating adhesion and workpiece quality. Due to a reduction of cobalt binder within the tungsten carbide-based tool substrates, an increase of tool performance regarding borehole quantity until coating delamination is demonstrated. While the reduction of tool wear on the rake face of the drilling tools can be correlated with the cutting tool performance, the online monitoring of cutting forces does not explicitly identify damaged cutting tools during machining.

Źródło:

Journal of Machine Engineering; 2020, 20, 2; 104-113
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Nanofluid assistance in machining processes – properties, mechanisms and applications: a review

Autorzy:

Grzesik, Wit

Powiązania:

https://bibliotekanauki.pl/articles/1429063.pdf

Data publikacji:

2021

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

nanofluid
nanoparticle
machining process
minimum quantity lubrication

Opis:

A special group of hybrid assisted processes termed media-assisted processes which apply liquid media with special additives in the form of nanoparticles supplied to the cutting zone is overviewed. Special attention is paid to minimum quantity lubrication (MQL) technique with the use of nanofluids. In this review paper some important thermal and tribological effects resulting from the applications of various nanoparticles are outlined and compared. The MQL-nano cutting fluid mechanisms (rolling and ploughing) are described. In particular, some important quantitative effects concerning thermal and tribological behaviour of the cutting process as well as surface quality are presented.

Źródło:

Journal of Machine Engineering; 2021, 21, 2; 75-90
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

Identification and Analysis of Linked SystemsDynamic Accuracy Proposal of a Measurement Approach and Instrumentation

Autorzy:

Dapero, A.
Archenti, A.

Powiązania:

https://bibliotekanauki.pl/articles/99462.pdf

Data publikacji:

2015

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machining system
accuracy
dynamics
elastically linked system

Opis:

In this paper a measurement approach and instrumentation for capturing the dynamic stiffness of a linked system is proposed. The approach is based on the loaded double ball bar (LDBB) in combination with an integral dynamic shaker. The innovation is the introduction of a dynamic load besides the static one given by the LDBB and consequently able to extract the frequency response functions, taking advantage of the possibility of orienting the LDBB in different directions of the machine tool. The dynamic behaviour is studied through experimental modal analysis. The test conditions are therefore more similar to a cutting situation in which both a static and a dynamic component of force characterise the system. However, it must be underlined that the introduced dynamic force does not replicate the one arising in a cutting operation, but it is chosen instead for its spectrum characteristics, i.e. the energy introduced must equally cover a given range of frequencies. The test method is able to reveal machine tool characteristics not obtainable with existing methods, for instance the variation of dynamic stiffness in the working space. The paper will include some theoretical aspects on the approach as well as some experimental investigation.

Źródło:

Journal of Machine Engineering; 2015, 15, 3; 90-105
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Numerical Simulation of Self-Excited Vibrations Under Variable Cutting Conditions

Autorzy:

Bąk, P. A.
Jemielniak, K.

Powiązania:

https://bibliotekanauki.pl/articles/99477.pdf

Data publikacji:

2015

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

self-excited vibration
numerical simulation
virtual machining

Opis:

A self-excited vibrations are one of the most important constraints to the performance and quality of machining part and it is affecting its dimensions and geometrical accuracy. Machining stability can be evaluated by different analytical and numerical methods. The paper presents utilization of numerical simulation of non-linear chatter in the time domain in stability analysis of machining process. Vibrations and cutting forces are an output from numerical simulation. In order to perform chatter recognition during excessive vibrations an automatic chatter detection is implemented in machining simulation. By combining all the above in one and enabling G-code reading, a tool for numerical simulation and validation of entire machining operation was created which is a subject of this paper.

Źródło:

Journal of Machine Engineering; 2015, 15, 1; 36-45
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Effect of granularity of reinforcing particles Al2O3 on EDM process of aluminium matrix composites

Autorzy:

Perończyk, J.

Powiązania:

https://bibliotekanauki.pl/articles/99521.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

aluminium composites
reinforcing phase
electro-discharge machining

Opis:

The study discusses issues related to the process of electro-discharge machining (EDM) composites based on Al + 20% Si + 5% Fe + 3% Cu + 1% Mg matrix manufactured using a powder metallurgy method. Ten percent by volume of Al2O3 grains of 3, 9, 23 and 53?m sizes with irregular sharp edges represented the reinforcing phase. EDM was performed with a machine equipped with a RLC generator using different (computational) discharge energies varied in steps within the 0.044 - 2.268 mJ range. The tests measured volumetric productivity of EDM (Vw) and roughness (Ra) of the machined surface. In addition, the researchers provided selected SEM images of ED-machined surfaces with some results of X-ray microanalyses of chemical composition performed in cavities and on the surfaces of irregularities. They also provided SEM images of Al2O3 grains adhering to the machined surface of the composite, showing the mechanism of erosion of dielectric particles in EDM conditions. They demonstrated that the energy of single discharges (Ei) was the main parameter effecting the process and results of EDM. The volumetric productivity of the process (Vw) and roughness of the machined surface (Ra) increase with growth of energy (Ei) and, at the same time, surface integrity (SI) changes.

Źródło:

Journal of Machine Engineering; 2012, 12, 2; 67-76
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

An efficient implementation of boundary conditions in an ALE model for orthogonal cutting
Efektywne sformułowanie warunków brzegowych w modelowaniu procesu skrawania we współrzędnych Lagrange-Eulera (ALE)

Autorzy:

Miguelez, M. H.
Munoz-Sanchez, A.
Cantero, J. L.

Powiązania:

https://bibliotekanauki.pl/articles/279416.pdf

Data publikacji:

2009

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

residual stresses
orthogonal machining
ALE
boundary conditions

Opis:

Prediction of machining-induced residual stresses is an interesting objective in the field of modelling manufacturing processes. Although Finite Element Analysis (FEA) has been widely used for this purpose, many problems are found when the numerical model is developed. Computational cost and numerical problems related to the extreme mesh distortion make the effort of finite element modelling of machining extremely time consuming. The aim of this work is to predict machinning-induced residual stresses using a finite element model based in ALE (Arbitrary Lagrangian Eulerian) approach. The finite element general-purpose code ABAQUS is used, modifying the previous model used in scientific literature to predict residual stresses. Boundary conditions in the entrance of the workpiece and in the upper border of the chip were modified from Lagrangian boundaries in the previous model, to Eulerian boundaries in the new model. Main advantages of the model presented in this work are low level of distortion of the mesh, the possibility of simulate long length of machined surface and time-efficiency. The model has been applied to calculate residual stresses in AISI 316L during machining. Reasonable agreement with experimental results has been found.
Przewidywanie szczątkowych naprężeń wywoływanych obróbką skrawaniemw materiale próbki stanowi interesujące zagadnienie modelowania tego typu technologii wytwarzania. Mimo, że analiza oparta na elementach skończonych znalazła szerokie zastosowanie w tej dziedzinie, jej skuteczność jest problematyczna na poziomie budowy modelu numerycznego. Koszt symulacji i kłopoty obliczeniowe związane z ogromnym zniekształceniem siatki elementów skończonych czynią ten rodzaj analizy wyjątkowo czasochłonnym. Celem tej pracy jest opis metody określania naprężeń szczątko- wych indukowanych obróbką skrawaniem za pomocą modelu z elementami skończonymi w opisie eulerowsko-lagrange'owskim ALE (ang. Arbitrary Lagrangian Eulerian). W obliczeniach zastosowano wielozadaniowy pakiet ABAQUS, który pozwolił na modyfikację dotychczas stosowanego modelu, opisanego w literaturze. Warunki brzegowe w obszarze wejścia noża w obrabiany materiał i górnej strefie wióra zmodyfikowano z typu Lagrange'a na Eulera w nowej wersji. Zaletą tego rozwiązania okazało się małe zniekształcenie siatki elementów skończonych, możliwość symulacji długich powierzchni obróbczych i znacznie krótszy czas obliczeń. Model wykorzystano do określenia naprężeń szczątkowych w stali AISI 316L podczas skrawania. Potwierdzono satysfakcjonującą zgodność symulacji z wynikami pomiarów doświadczalnych.

Źródło:

Journal of Theoretical and Applied Mechanics; 2009, 47, 3; 599-616
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Using thermovision for machining processes inspection

Autorzy:

Molenda, J.
Charchalis, A.

Powiązania:

https://bibliotekanauki.pl/articles/245868.pdf

Data publikacji:

2016

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

turning
infrared measurement
drilling
machining processes temperature

Opis:

During metal cutting process, an increase of the tool and workpiece temperatures can be observed. The heat generated has a negative influence on the tool life and performance. It causes rapid tool wear, plastic deformation of the cutting edge, built-up-edge formation and others. Therefore, the control of cutting temperature is required to achieve the desired tool performance. Temperature is the most frequently measured physical quantity, second only to time. Accurate temperature monitoring improves product quality and increases productivity. Downtimes are decreased, since the manufacturing processes can proceed without interruption and under optimal conditions. In this work, authors propose noncontact infrared method for determining temperature of machining processes. This was mainly due to thermography ability to catching moving targets in real time, to measure temperatures over some area not only in point. As a result of measurement, it is obtained a data set that is presented in a form of a colourful map: a thermogram. Getting an accurate temperature of an object using this method is difficult because of numerous errors, which researchers could done during experiments. This work presents some results of research done during turning and drilling realized on conventional lathe CDS 6250 BX-1000. These demonstrate the usefulness of proposed method to study the machining processes temperature.

Źródło:

Journal of KONES; 2016, 23, 3; 345-350
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

Ecoenergetic cutting techniques

Autorzy:

Zaborowski, T.
Shvartsburg, L.
Ivanova, N.
Ryabov, S.

Powiązania:

https://bibliotekanauki.pl/articles/407454.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

technology
machining
quality
energy
ecology
interaction
safety

Opis:

The article discusses the relationship between energy quality technologies cutting and their environmental friendliness. Based on the energy analysis shows that energy consumption in the individual technological process is connected with the cutting power and power loss, which form the environmental indicators of the cutting process and reduce its energy efficiency. In addition, it is shown that at implementation of technological processes on the equipment, electrical systems are AC systems the implementation of the cutting process occurs when excessive consumption of currents. The article presents the results of studies on the energy efficiency of cutting processes, definition of the complex influence of cutting processes on the environment and humans, the formation of ways of improving environmental and energy performance quality of these processes.

Źródło:

Management and Production Engineering Review; 2018, 9, 4; 70-75
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 74.

Tytuł:

Database of multi-variant machining process plan

Autorzy:

Gola, Ł.

Powiązania:

https://bibliotekanauki.pl/articles/409500.pdf

Data publikacji:

2014

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

Database
multi-variant machining process plan
access

Opis:

This paper presents database of multi-variant machining process plan. This database is a part of CAPP (Computer Aided Process Planning) – prototype system, which was built on the basis of algorithm generating multi-variant process plan. Database was implemented to Microsoft Access 2010.

Źródło:

Research in Logistics & Production; 2014, 4, 3; 201-207
2083-4942
2083-4950

Pojawia się w:

Research in Logistics & Production

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Machine Tool Table Dynamics Tests when Starting and Braking during an Operation Test

Autorzy:

Leleń, Michał
Sałamacha, Daria

Powiązania:

https://bibliotekanauki.pl/articles/2201894.pdf

Data publikacji:

2023

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machine tools
machine dynamics
machining
acceleration
deceleration

Opis:

The main objective of the presented research is to analyze the dynamics of table motion of a CNC FV580A 3-axis milling machine during machining with fixed technological cutting parameters. The research includes the measurement of velocity, acceleration and deceleration, as well as distance and time parameters related to the movement of the machine's table during starting and braking during work tests. The results of the measurements were recorded using a Phantom v1610 high-speed video camera equipped with a Nikon ED AF NIKKOR 80:200 mm 1:2.8D lens, dedicated to the analysis of high-speed phenomena. The analysis presented in the publication includes a comparison of the results of the motion parameters obtained as a function of the feed motion speed vf. The results of the obtained tests and their analysis are discussed and presented in graphs and tables.

Źródło:

Advances in Science and Technology. Research Journal; 2023, 17, 1; 64--74
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

Obróbka elementów wielkogabarytowych. Zagadnienia pomiarowe
Machining of large-size elements. Measurement problems

Autorzy:

Horyashchenko, S.
Matuszewski, M.
Oborski, I. L.
Styp-Rekowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/404459.pdf

Data publikacji:

2018

Wydawca:

Wydawnictwo AWART

Tematy:

large-size element
machining
machining accuracy
thermal forcing
obróbka skrawaniem
korpus obrabiarki
pomiar odchyłek kształtu
dokładność obróbki

Opis:

The paper presents the problems concerning the machining of large-size elements. Metrological problems, which have a significant influence on the accuracy of such elements, have been indicated. Proposals how to minimize the effects of thermal forcing interacting during machining were also presented. A results of experimental investigations verifying the proposals were presented too.
W artykule przedstawiono problemy dotyczące obróbki skrawaniem elementów o dużych gabarytach. Wskazano zagadnienia metrologiczne, które mają istotny wpływ na dokładność wykonania takich elementów. pisano propozycje jak zminimalizować skutki czynników cieplnych oddziałujących podczas obróbki oraz rezultaty badań je weryfikujących.

Źródło:

Obróbka Metalu; 2018, 2; 38-41
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 77.

Tytuł:

Nieciągłości geometryczne obrabianych elementów a cechy struktury geometrycznej powierzchni
Geometric discontinuities of workpieces and the features of geometric structure of surface

Autorzy:

Słomion, Małgorzata
Wojciechowski, Andrzej
Matuszewski, Maciej
Polishchuk, Oleg

Powiązania:

https://bibliotekanauki.pl/articles/404434.pdf

Data publikacji:

2019

Wydawca:

Wydawnictwo AWART

Tematy:

geometric discontinuity
machining
surface geometric structure
roughness

Opis:

The surface geometric structure largely determine the functional characteristics of machine elements and their tribological characteristics. In this paper the influence of geometric discontinuities, such as holes and grooves on the features of surface geometric structure were presented. This impact was assessed on the basis of surface roughness measurements. The conducted experimental verification showed the influence of geometric discontinuities on the features of geometric structure of machined surface.
Struktura geometryczna powierzchni w dużym stopniu determinuje cechy użytkowe elementów maszyn i ich charakterystyki tribologiczne. W artykule przedstawiono wpływ nieciągłości geometrycznych typu otwór oraz rowek na cechy struktury geometrycznej powierzchni. Ocenę tego wpływu dokonano w oparciu o pomiary chropowatości powierzchni. Przeprowadzona weryfikacja doświadczalna wykazała wpływ nieciągłości geometrycznych na parametry opisujące strukturę geometryczną powierzchni.

Źródło:

Obróbka Metalu; 2019, 3; 32-37
2081-7002

Pojawia się w:

Obróbka Metalu

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

The effect of machining conditions on the forces in the process of roller brush machining

Autorzy:

Matuszak, J.

Powiązania:

https://bibliotekanauki.pl/articles/102899.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

brushing
machining conditions
radial force
cutting force

Opis:

Because of its advantages, brushing processing has many uses. The main ones include the removal of corrosion products, surface cleaning, deburring and shaping the properties of the surface layer. The intensity of these processes depends on the degree of impact of brush fibres on the work surface. In the case of tools, in which the resilient fibres are the working elements, forces in the brushing process, apart from the machining parameters, depend on the characteristics and overall dimensions of individual fibres. The paper presents the results of studies of the influence of technological parameters and type of fibres on the radial force in the brushing process.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 4; 294-300
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

En route to intelligent wood machining – current situation and future perspectives

Autorzy:

Möhring, H.-Christian
Eschelbacher, Sarah
Güzel, Kamil
Kimmelmann, Martin
Schneider, Matthias
Zizelmann, Christoph
Häusler, Andreas
Menze, Christian

Powiązania:

https://bibliotekanauki.pl/articles/99542.pdf

Data publikacji:

2019

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

wood machining
process optimisation
monitoring and control

Opis:

Wood materials are an important part of our daily life. Besides furniture, doors and window elements, parquet floors, veneering, ply wood, chip- and fibreboards, also structural elements for buildings are typical products. Due to the specific properties, variety and complexity of natural wood, wood materials and wood composites, the machining of parts made out of these materials exhibits specific challenges. In order to further improve productivity, quality and efficiency in wood machining, innovative solutions with respect to tool technology, process planning, machinery, process monitoring and intelligent control are necessary. This keynote paper reviews and summarizes scientific developments in wood machining in recent years. Furthermore, exemplary current an ongoing research activities are introduced. Finally, the paper presents and discusses future potentials regarding new approaches for intelligent process control in wood machining.

Źródło:

Journal of Machine Engineering; 2019, 19, 4; 5-26
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Application of the Hamming network to the classification of surfaces after abrasive machining

Autorzy:

Lipinski, D.
Tomkowski, R.
Kacalak, W.

Powiązania:

https://bibliotekanauki.pl/articles/99929.pdf

Data publikacji:

2018

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

classification
surface topography
abrasive machining
neural network

Opis:

The use of artificial neural networks for modelling and inference about surface parameters is a more and more often undertaken research topic. Based on the analysis of the ranges of suitability of surface topography parameters, a variety of different parameters can be observed to identify surfaces with different features and different conditions of use. The issues of surface topography analysis and determination of surface condition after abrasive machining are of fundamental importance. Currently, when assessing the surface intended for interaction with the other surface, it is possible to use many surface evaluation parameters. Assigning the machined surface to the appropriate assessment group, especially in automated quality control systems, requires a preliminary surface classification. In this article Hamming's network was used for the surface classification along with modification of Hamming distance.

Źródło:

Journal of Machine Engineering; 2018, 18, 4; 114-126
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 81.

Tytuł:

Development of bilateral control system for process machining subject to changing cutting conditions

Autorzy:

Osada, T.
Ken’ichi, Y.
Fofana, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/99956.pdf

Data publikacji:

2010

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

man-machine system
bilateral control
machining robot

Opis:

Finishing processes such as deburring are performed on a wide variety of products in various quantities by machinists on a piece-by-piece basis in order to improve surface finish. Deburring is a major contributor to time and cost of the improvement of the surface finish. During deburring, the intended quality of the surface finish is very much dependent on the operator's skills. This work is concerned with understanding and interpreting how a bilateral robot can assist the deburring process. We propose a control method based on a machining model that is made up of several components, including the cutting tool, spindle speed, feedrate of the tool and other important constituent elements of the machining system. Machining operations are carried out for selected cutting conditions. A haptic robot is directly connected to the machine-tool and the operator. The motion of the haptic robot is controlled automatically under machining conditions in which it is possible to achieve highly accurate surface finish. The force feedback from the haptic robot influences the continuous adjustments made by the machining operator. Mathematical equations for the haptic interaction between the robot and process machining, involving time delays, are established. For specific range of cutting conditions, the regimes wherein the bilateral control system enhances the surface finish of the work piece in a sustained way are located. The regimes and effectiveness of the control system are quantified experimentally.

Źródło:

Journal of Machine Engineering; 2010, 10, 3; 90-101
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Influence of grinding conditions on the topographic characteristic of machined surfaces

Autorzy:

Żak, K.

Powiązania:

https://bibliotekanauki.pl/articles/100111.pdf

Data publikacji:

2014

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

surface texture
surface roughness
hard machining
grinding

Opis:

This paper compares the ability of grinding processes to enhance functional properties of the surface textures produced. The main objective of such a comparison is to facilitate the decision about precision grinding operations. The experimental study performed includes two grinding operations using electro-corundum Al2O3 and CBN wheels. For this purpose, the topographic features of ground surfaces with the Sa roughness parameter of about 0.2?m were compared. Apart from the set of 3D roughness parameters, the frequency, fractal, wavelet and motif characteristics were analyzed.

Źródło:

Journal of Machine Engineering; 2014, 14, 2; 47-56
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 83.

Tytuł:

Smart tool-related faults monitoring system using process simulation-based machine learning algorithms

Autorzy:

Ebrahimi Araghizad, Arash
Tehranizadeh, Faraz
Kilic, Kemal
Budak, Erhan

Powiązania:

https://bibliotekanauki.pl/articles/28407322.pdf

Data publikacji:

2023

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

Industry 4.0
machining
machine learning
monitoring

Opis:

In this paper a novel approach for monitoring tool-related faults in milling processes by utilizing process simulation-based machine learning algorithms, specifically Random Forest algorithms, for fault detection is presented. In order to train machine learning models in tool condition monitoring, laboratory tests have traditionally been required. This method eliminates the need for costly, time-consuming laboratory tests. The training process has been simplified by utilizing analytical simulation data and provides a more cost-effective solution by leveraging analytical simulation data. Based on the results of this study, the proposed approach has been demonstrated to be 94% accurate at predicting tool-related faults, demonstrating its potential to serve as an efficient and viable alternative to conventional methods. These findings have been supported by actual measurement data, with a notable accuracy rate of 93% in the predictions. Furthermore, the results indicate that process simulation-based machine learning algorithms will have a significant impact on the tools condition monitoring and the efficiency of manufacturing processes more generally. To further enhance the capabilities of the proposed fault monitoring system, process-related and machine-related faults will be investigated in future research. Several machine learning algorithms will be explored as well as additional data sources will be integrated in order to enhance the accuracy and reliability of fault detection.

Źródło:

Journal of Machine Engineering; 2023, 23, 4; 18--32
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 84.

Tytuł:

Investigations of Electro-Discharge Mechanical Machining of Manganese Cast Steels

Autorzy:

Młynarczyk, P. S.
Spadło, S.

Powiązania:

https://bibliotekanauki.pl/articles/947639.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

EDM
flexible electrode
manganese cast steel
electro-discharge machining
roughness
machining efficiency
elektroda
staliwo manganowe
obróbka elektroerozyjna
chropowatość

Opis:

This paper presents a study of the hybrid electro-discharge mechanical machining BEDMM (Brush Electro-Discharge Mechanical Machining) with the application of a rotary disk brush as a working electrode. The discussed method enables not only an effective machining with a material removal rate of up to 300 mm3/min but also finishing (with the obtained roughness of Ra < 0.5 μm) of the surfaces of complex-shaped alloys with poor machinability. The analysis of the factors involved in the machining process indicates that its efficiency is determined by electrodischarge. The use of flexible working electrodes makes it possible to apply simple technological instrumentation and results in the simplicity of the process automation. The aim of the study was to obtain quantitative relationships between the parameters of brush electro discharge mechanical machining (BEDMM) and its effects. The presented experimental research results define the effect of the process input parameters on the performance and roughness of machined surfaces obtained for manganese cast steel.

Źródło:

Archives of Foundry Engineering; 2020, 20, 2; 95-100
1897-3310
2299-2944

Pojawia się w:

Archives of Foundry Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Metodyka pomiarów ultradźwiękowych oscylacji narzędzi obróbkowych urządzeniem LDV
Methodology of measuring ultrasonic oscillations of tools using LDV

Autorzy:

Nazarko, P.
Wdowik, R.
Porzycki, J.

Powiązania:

https://bibliotekanauki.pl/articles/277595.pdf

Data publikacji:

2013

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

obróbka ze wspomaganiem ultradźwiękowym
obróbka ubytkowa
wibrometr laserowy
widmo częstotliwości
ultrasonic assisted machining
machining
laser vibrometer
frequency spectrum

Opis:

W artykule przedstawiono metodykę wyznaczania widma częstotliwości ultradźwiękowych oscylacji narzędzi obróbkowych stosowanych w hybrydowych procesach obróbki ubytkowej. W celu określenia widma częstotliwości zastosowano laserowy wibrometr skanujący LDV (ang. Laser Doppler Vibrometer).
The methodology of ultrasonic oscillation spectrum determination for tools applied in hybrid machining processes is presented. The laser scanning vibrometer is applied in order to determine frequency spectrum.

Źródło:

Pomiary Automatyka Robotyka; 2013, 17, 10; 160-165
1427-9126

Pojawia się w:

Pomiary Automatyka Robotyka

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 86.

Tytuł:

Dokładność wytwarzania powierzchni śrubowych metodą WEDM
Accuracy of screw surfaces manufactured by the WEDM

Autorzy:

Lechniak, Z.

Powiązania:

https://bibliotekanauki.pl/articles/269892.pdf

Data publikacji:

2011

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

obróbka elektroerozyjna
EDM
WEDM
wycinanie elektroerozyjne
dokładność
powierzchnia śrubowa
electrodischarge machining (WEDM)
wire electrical machining
accuracy
helical surface

Opis:

Wycinanie elektroerozyjne WEDM jest obróbką dokładną, często stosowaną jako obróbka wykończeniowa. W pracy przedstawiono reprezentatywne powierzchnie śrubowe, spełniające kryteria znacznych wartości i intensywnej zmienności pochyleń. Po obróbce WEDM przeprowadzonej w wielu wariantach poddano uzyskane powierzchnie znacznej liczbie pomiarów, które ujawniły tendencje utraty uzyskiwanych dokładności w miarę wzrostu wartości kątów pochyleń powierzchni. W pracy zaprezentowano sposób podniesienia dokładności wytwarzania powierzchni śrubowych metodą korekty programu obróbkowego, zarówno w oparciu o dane analityczne jak i wyliczenia wynikające z przeprowadzonych eksperymentów.
Wire electrical discharge machining (WEDM) enjoys a reputation of precision treatment and is often used as finishing manufacturing operation. The relevant screw surfaces have been proposed in this paper, satisfying criteria for high and strongly varying surface slopes. A series of experiments have been performed and then the machined samples have been subjected to extensive measurements which disclosed that the accuracy loss is directly linked to surface slope angle increase. The author of the paper suggests a method for accuracy improvement by modifying the NC program whereas the corrective procedure is based both on analytical data and on calculations resulting from the performed experiments.

Źródło:

Inżynieria Maszyn; 2011, R. 16, z. 3; 79-87
1426-708X

Pojawia się w:

Inżynieria Maszyn

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 87.

Tytuł:

Comparison of composite laminates machining methods and its influence on process temperature and edge quality
Porównanie metod obróbki laminatów kompozytowych i ich wpływ na temperaturę procesu i jakość powierzchni cięcia

Autorzy:

Jaśkiewicz, Robert

Powiązania:

https://bibliotekanauki.pl/articles/36408577.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

CFRP machining
composite machining temperature
DSC tests
temperature tests
obróbka kompozytów węglowych
temperatura obróbki
temperatura zeszklenia
jakość powierzchni

Opis:

The article presents the description of technological trials and the results of three methods of machining carbon fiber reinforced composites panels. It also reviews the literature concerned heat affected zone in composites and its influence on material properties. As a part of the research, the cutting method using diamond coated saw was tested, as well as the milling method with two different types of carbide milling cutters. The processing of the panels was done using 4-axis CNC machine with special adapter for cutting discs in Composite Testing Laboratory (Center for Composite Technologies, Warsaw Institute of Aviation). The methods were compared in terms of machined edge quality and panel temperature during the processes. For this purpose, thermocouples were mounted into panels. Records from thermocouples were included. Edge quality and surface roughness have been checked by microscopic observation. Additionally, samples machined by each evaluated processing method were tested using differential scanning calorimetry (DSC). The method was used to determine the glass transition temperature of the tested material. The article conclusions contain a comparison of three processing methods in terms of cutting quality, process temperature, processing method productivity as well as DSC tests results.
W niniejszym artykule zawarto opis i rezultaty trzech metod obróbki materiałów kompozytowych wzmocnionych włóknami węglowymi. Artykuł zawiera przegląd literaturowy tematu wpływu ciepła podczas obróbki na właściwości obrabianych materiałów kompozytowych. W ramach wykonanych prób użyto tarczy z nasypem diamentowym i dwóch różnych frezów węglikowych. Testy zostały wykonane z użyciem 4-osiowego plotera frezującego z agregatem do tarcz tnącym w warsztacie Laboratorium Badań Kompozytowych w Instytucie Lotnictwa w Warszawie. Metody obróbki zostały porównane pod względem uzyskiwanej jakości krawędzi cięcia i temperatury podczas procesu. W artykule zawarto wykresy zapisów temperatury z termopar umieszczonych w panelach testowych. Jakość i chropowatość uzyskiwanych podczas cięcia powierzchni zostały porównane podczas obserwacji mikroskopowych. Dodatkowo wykonano testy sprawdzenia temperatury zeszklenia próbek z obrabianych obszarów z użyciem kalorymetru różnicowego. Wniosku artykułu podsumowują testy z uwzględniając rezultaty przeprowadzonych testów obróbki, wyniki DSC i możliwości produkcyjne.

Źródło:

Transactions on Aerospace Research; 2019, 4 (257); 46-54
0509-6669
2545-2835

Pojawia się w:

Transactions on Aerospace Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Problemy kształtowania ubytkowego materiałów kompozytowych - rozwiązania oferowane przez firmy narzędziowe
Problems of machining of composite materials - solutions offered by tool companies

Autorzy:

Burek, J.
Lisowicz, J.
Rydzak, T.
Szajna, A.

Powiązania:

https://bibliotekanauki.pl/articles/196176.pdf

Data publikacji:

2017

Wydawca:

Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza

Tematy:

kompozyty
problemy obróbki kompozytów
delaminacja
narzędzia do obróbki kompozytów
composites
problems with composites machining
delamination
tools for composites machining

Opis:

Charakterystyczne właściwości materiałów kompozytowych, takie jak wysoka wytrzymałość i sztywność, przy jednoczesnym zmniejszeniu masy sprawiają, że zyskują coraz większe znaczenie jako materiały konstrukcyjne. Elementy kompozytowe często wymagają wykonania wykańczających operacji z zastosowaniem obróbki ubytkowej, takiej jak frezowanie lub wiercenie. Okazuje się jednak, że kształtowanie ubytkowe kompozytów – materiałów niejednorodnych i anizotropowych przysparza sporo trudności. Najczęściej napotykanym problemem jest zjawisko delaminacji, czyli rozdzielenia sąsiadujących warstw osnowy. Producenci narzędzi skrawających proponują coraz większy wybór narzędzi do obróbki kompozytów, które pozwolą na uniknięcie lub minimalizację niekorzystnych zjawisk towarzyszących obróbce materiałów kompozytowych.
The characteristic properties of composite materials, such as high strength and stiffness while reducing weight, make them increasingly important as construction materials. Composite components often require finishing operations, such as milling and drilling. However, the loss shaping of composites – nonhomogeneous and anisotropic materials – turns out to be problematic and difficult. The most common problem is the phenomenon of delamination – the separation of adjacent warp plies. Cutting tool manufacturers offer an increasing choice of composite processing tools to avoid or minimize the disadvantageous effects associated with composite materials processing.

Źródło:

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2017, z. 89 [295], 4; 435-447
0209-2689
2300-5211

Pojawia się w:

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 89.

Tytuł:

Interaktywne hybrydowe systemy monitorowania i optymalizacji procesów mikro- i nanoobróbki
Interactive hybrid systems for monitoring and optimization of micro- and nano-machining processes

Autorzy:

Lipiński, D.
Majewski, M.

Powiązania:

https://bibliotekanauki.pl/articles/155273.pdf

Data publikacji:

2014

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

monitorowanie procesów mikroobróbki
monitorowanie procesów nanoobróbki
optymalizacja procesów mikroobróbki
optymalizacja procesów nanoobróbki
system inteligentny
interakcja
sztuczna inteligencja
monitoring of micro-machining processes
monitoring of nano-machining processes
optimization of micro-machining processes
optimization of nano-machining processes
intelligent system
interaction
artificial intelligence

Opis:

Artykuł prezentuje opracowaną koncepcję interaktywnych hybrydowych systemów monitorowania i optymalizacji procesów mikro- i nanoobróbki. Inteligentny system zdalnego monitorowania i optymalizacji jakości procesów, wyposażony w interfejs wizualny i głosowy, przedstawiono w przykładowym zastosowaniu w procesach precyzyjnego szlifowania. Opracowana koncepcja proponuje architekturę systemu wyposażoną w warstwę analizy danych, warstwę nadzorowania procesu, warstwę decyzyjną, podsystem komunikacji głosowej w języku naturalnym oraz podsystem komunikacji wizualnej z opisem głosowym.
The paper presents a concept of interactive hybrid systems for monitoring and optimization of micro- and nano-machining processes. The intelligent system for monitoring and optimization of the process quality, equipped with a visual and speech interface, is presented in an exemplary application to precision grinding processes. The developed concept proposes an architecture of the system equipped with a data analysis layer, a process supervision layer, a decision layer, a communication subsystem by speech and natural language, and a visual communication subsystem using vocal descriptions. In the proposed system, computational intelligence methods allow for real-time data analysis of the monitored process, configuration of the system, process supervision based on process features and quality models. The system is also capable of detection of inaccuracies, estimation of inaccuracies results, compensation of inaccuracies results, and selection of machining parameters and conditions. The paper describes the concept of voice and visual communication (Fig. 1), and the complete structure of the system (Fig. 2). The interactive system using mobile technologies is shown in Fig. 3, while the system using neural models is presented in Fig. 4. Also the block diagrams of command meaning analysis methods (Figs. 5 and 6), and the probabilistic neural networks for process assessment (Figs. 7 and 8) are shown in the paper.

Źródło:

Pomiary Automatyka Kontrola; 2014, R. 60, nr 10, 10; 920-923
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 90.

Tytuł:

Areal field and fractal based characterization of hard surfaces produced by different machining operations

Autorzy:

Zak, K.

Powiązania:

https://bibliotekanauki.pl/articles/99745.pdf

Data publikacji:

2016

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

hard machining
grinding
ball burnishing
surface texture
fractals

Opis:

This literature survey highlights the possible influences of surface roughness parameters on functional properties of surfaces produced by different finishing operations. The prediction of such functional properties as fatigue, sealing capacity, adhesion, friction, wear and corrosion resistance based on five groups of spatial (S) roughness parameters is overviewed. In contrast, traditional approach based on 2D roughness parameters is provided. Some real 3D surface topographies produced with desired functional properties by finishing cutting and abrasive operations are characterized. This survey confirms the vital role of machined surfaces in the functionality of machine components.

Źródło:

Journal of Machine Engineering; 2016, 16, 1; 24-32
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 91.

Tytuł:

Development of a new high-pressure cooling system for machining of difficulut-to-machine materials

Autorzy:

Tanabe, Ikuo
Yamagami, Yuhta
Hoshino, Hideo

Powiązania:

https://bibliotekanauki.pl/articles/100031.pdf

Data publikacji:

2020

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

difficult-to-machine materials
forced cooling
machining
coolant

Opis:

In recent years, titanium alloys and nickel alloys have become eminent for making aeronautic and astronautic parts. Since both nickel and titanium alloys have a very small thermal conductivity, the being used tool will suffer from huge damage by heat generated during the grinding process. Therefore, there is a requirement for a durable tool with excellent cooling capacity. In this research, the technology regarding the new forced cooling using with high-pressure coolant for machining difficult-to-machine material was developed and evaluated. A through-hole in the near the tip on the rake face of the turning tool is firstly machined by electrical discharge machining. High-pressure coolant was then supplied to the turning tool from the hole on the bottom of the tool. Several values of pressure were tried in many experiments. It is concluded from the results that; (1) a new forced cooling method in the form of drilling a hole at the tip of the tool from which supply high-pressure coolant, a tool temperature decrease and a tool-life prolongation could be achieved, (2) the technology could effectively cool near the tip of turning tool, (3) the chip was effectively broken by the high pressure, (4) It was confirmed that the tool cutting edge condition was stabilized, the surface roughness of the machined workpieces was improved, the tool hardness was maintained and the tool-life was prolonged due to the cooling effect of the devised tool.

Źródło:

Journal of Machine Engineering; 2020, 20, 1; 82-97
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 92.

Tytuł:

Simulation tests of adaptive control strategies for CNC machine tools

Autorzy:

Stryczek, Roman
Szczepka, Wojciech

Powiązania:

https://bibliotekanauki.pl/articles/100146.pdf

Data publikacji:

2019

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

adaptive control
processing simulation
virtual reality
intelligent machining

Opis:

The issue addressed in the article concerns the current needs and possibilities of computer-aided design of adaptive control strategies in machining processes. A simulative method of selecting the adaptive feed control strategy while rough turning materials difficult to machine, effective and inexpensive in its implementation, based on controlling the load placed on the machine's drives, has been presented. The results of a number of virtual tests of the proposed feed control strategy have been included, while paying particular attention to the stability of the machining process during moments of sudden change in the machining allowance. The obtained results meet the accepted quality indicators of the control algorithm. At the same time, the experiences collected by the author while conducting the tests confirmed the complexity of the issue and the resulting necessity to implement a comprehensive simulation testing program.

Źródło:

Journal of Machine Engineering; 2019, 19, 2; 73-82
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 93.

Tytuł:

Evaluation of the surface topography after precision machining

Autorzy:

Tomkowski, R.
Kacalak, W.
Lipiński, D.

Powiązania:

https://bibliotekanauki.pl/articles/99460.pdf

Data publikacji:

2012

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

extra smooth surfaces
geometric features
surface parameters
machining

Opis:

Analysis of the geometric features and determination of the condition of the surfaces machined during an abrasive process is of crucial importance for evaluation of their wear properties. Numerous parameters can be used for assessing topography of technical surfaces. Many of them contain information that is general or poorly correlated with the wear features. The group of parameters used for such purpose should include those that do not cause information redundancy and provide distinct information. Evaluation of the surface geometric structure after precision machining is a difficult process due to the limited scope of unevenness heights that fit within the range of a few micrometers to a few nanometers. In this paper the synthetic indexes of the evaluation of extra smooth surfaces were created, taking into consideration numerous elementary parameters. The value of the synthetic index was determined as the geometric average of the partial indexes which, when compared to the arithmetic average, is more dependent on the data believed to be disadvantageous.

Źródło:

Journal of Machine Engineering; 2012, 12, 4; 71-80
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Autonomous machining – recent advances in process planning and control

Autorzy:

Dittrich, Marc-André
Denkena, Berend
Boujnah, Haythem
Uhlich, Florian

Powiązania:

https://bibliotekanauki.pl/articles/99503.pdf

Data publikacji:

2019

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

machine tool
process planning
adaptive machining
machine learning

Opis:

While autonomous driving has come close to reality over the recent years, machining is still characterised by many manual tasks and prone to costly errors. In this article, an overview is given about the potential of autonomous machining and uprising technologies that support this vision. For that purpose, a definition of autonomous machine tools and the required elements is presented. Next, selected elements of an autonomous machine tool, e.g. sensory machine components and control loops, are discussed. Finally, some insights into ongoing research projects regarding the use of machine learning for process planning and control are given.

Źródło:

Journal of Machine Engineering; 2019, 19, 1; 28-37
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Effect of silicon content on machinability of AL-SI alloys

Autorzy:

Akyüz, B.

Powiązania:

https://bibliotekanauki.pl/articles/102852.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining
cutting force
mechanical properties
Al-Si alloys

Opis:

In this study the effect of the change in the amount of Silicon (Si) occuring in Al-Si alloys on mechanical and machinability properties of the alloy was investigated. The change in mechanical properties and microstructure, which depends on the increase in Si percentage, and the effects of this change on Flank Build-up (FBU), wear on the cutting edge, surface roughness, and machinability were also studied. Alloys in different ratios of Si (i.e. 2 to 12 wt %), were employed in the study. The specimens for tests were obtained by casting into metal moulds. The results obtained from experimental studies indicate improved mechanical properties and machinability, depending on the rise in Si percentage in Al-Si alloys. It is also observed that the increase in Si percentage enhanced surface quality.

Źródło:

Advances in Science and Technology. Research Journal; 2016, 10, 31; 51-57
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 96.

Tytuł:

Influence of machining strategies and technological history of semi-finished product on the deformation of thin-wall elements after milling

Autorzy:

Zawada-Michałowska, M.
Kuczmaszewski, J.
Pieśko, P.
Łogin, W.

Powiązania:

https://bibliotekanauki.pl/articles/103404.pdf

Data publikacji:

2017

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

machining strategies
technological history
thin-walled elements
deformation

Opis:

The paper presents an analysis of the influence of machining strategy and the technological history of semi-finished product on the deformation of thin-walled elements made of aluminium alloy EN-AW 2024 after milling. As a part of this research work, five machining strategies are analysed. Additionally, the rolling direction of the plate (longitudinal and transversal) is taken into account as a technological history. During the research, the focus is set on the effects of the machining strategies i.e. HPC, HSM and conventional machining as well as their combinations on the post-machining stresses and deformations. Each of these strategies has a different range of technological parameters, which results in differences in machining efficiency and introduces post-machining stresses to the surface layer of the workpiece that vary in values and nature (i.e. compressive stresses or tensile stresses). The conducted study shows that larger deformations were obtained for transversal rolling direction in each analyzed case. The lowest deformation both for transversal and longitudinal rolling direction were achieved for the HSM and CM strategy.

Źródło:

Advances in Science and Technology. Research Journal; 2017, 11, 3; 289-296
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Carbide Milling Cutter Blades Durability during Machining of AL-SI Casting Alloy

Autorzy:

Kuczmaszewski, J.
Pieśko, P.
Zawada-Michałowska, M.

Powiązania:

https://bibliotekanauki.pl/articles/2064916.pdf

Data publikacji:

2018

Wydawca:

STE GROUP

Tematy:

machining of aluminium alloys
tool coating
tool wear

Opis:

The paper presents results of wear measurements of carbide shank milling cutters during machining of AlSi10Mg casting alloy. The comparison was made between blades wear of milling cutters without protective coating, with TiB2 coating, and with TiAlCN coating. All cutters had identical geometry dedicated to milling of materials of ISO N group. To assess blades wear degree, measurement of two direct indicators, i.e. VBC and VBBmax, and one indirect indicator, i.e. machined surfaces roughness, were used. Received results allowed to determine usefulness of using selected protective coatings in machining of aluminium alloys, especially Al-Si casting alloys.

Źródło:

Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 169--175
2545-2827

Pojawia się w:

Multidisciplinary Aspects of Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Influence of Selected Diagnostic Parameters on the Quality of AWJ Cutting Surface

Autorzy:

Wala, Tomasz
Lis, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/2067548.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

waterjet machining
quality machine surface
monitoring AWJ process

Opis:

The article presents a review of research methods for the cutting process using the abrasive waterjet machining. The focus was on assessing the possibility of monitoring the cutting process based on the parameters available for direct or indirect measurement. An attempt was made to evaluate their influence on the machined surface after treatment with the abrasive cutting method. These parameters include, inter alia, vibrations of the cutting head, force effects on the head support structure and the material to be cut, dynamic properties of the machine support structure and high pressure pumps. As part of the own research, correlation was sought for the registered selected signal characteristics with the cutting parameters responsible for the process course and the parameters related to the obtained machined surface. For this purpose, a model of the deflection angle of the abrasive waterjet was proposed, which qualitatively determines the condition of the surface after cutting. The angle of inclination of the abrasive waterjet is determined on the basis of the registration of the feed force during the cutting process. The research on surface topography was extended by an attempt to determine the surface roughness by measuring vibrations and looking for correlation between the displacements of the cutter head tip and the measured roughness height profile. These tests also allowed the identification of selected frequencies that clearly result from the set parameters of the cutting process. The last stage of the research was to monitor the cutter head behaviour using a deformation sensor as another concept for recording the forces during the cutting process. Finally, the proposed methodology was characterized in the context of its usefulness in the on-line process monitoring and supervision system.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 1; 129--140
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

Optimizing modular machining line design problem with mixed activation mode of machining units

Autorzy:

Belmokhtar, S.
Dolgui, A.
Delorme, X.
Ignatenko, I.

Powiązania:

https://bibliotekanauki.pl/articles/375904.pdf

Data publikacji:

2007

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

modular machining line
cost optimization
mixed-integer programming

Opis:

A modular transfer line designing problem is investigated. The problem is to find the best subset of modules (machining units) from a given set and to assign them to different stations so that technological constraints and cycle upper limit are respected and the line cost is minimal. The investigated lines have a mixed activation mode for the machining units of each station, i. e. the units of each station are arranged into a series of stages such that each stage is composed of several units activated in parallel. A mixed integer program approach is proposed to model and solve the corresponding design problem. Improvements are suggested in order to reduce the model size and speed up the computations.

Źródło:

Decision Making in Manufacturing and Services; 2007, 1, 1-2; 35-48
1896-8325
2300-7087

Pojawia się w:

Decision Making in Manufacturing and Services

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 100.

Tytuł:

A transfer line balancing problem by heuristic methods: industrial case studies

Autorzy:

Guschinskaya, O.
Dolgui, A.

Powiązania:

https://bibliotekanauki.pl/articles/375913.pdf

Data publikacji:

2008

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

computer-aided design
machining
line balancing
optimization
heuristics

Opis:

The paper deals with the problem of optimal configuration of a type of transfer lines which are equipped with transfer machines. Such machines perform operations with standard modular spindle heads which are activated sequentially. All operations assigned to the same spindle head (block of operations) are executed simultaneously by a set of tools fixed at the spindle head. The quantity of machines and spindle heads used to produce a part with the given productivity rate defines the final cost of the transfer line which must be minimized. To minimize this cost, a combinatorial problem of operations assignment to blocks and machines must be solved. The solution must provide a desired productivity (cycle time), it must also satisfy precedence and compatibility constraints. In this paper, we suggest improved versions of FSIC heuristic algorithm in order to help line designers to solve real-scale industrial problems. Results of computational experiments obtained for industrial cases are presented.

Źródło:

Decision Making in Manufacturing and Services; 2008, 2, 1-2; 33-46
1896-8325
2300-7087

Pojawia się w:

Decision Making in Manufacturing and Services

Dostawca treści:

Biblioteka Nauki

/5

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