Wszystkie pola: metal cutting - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Development of tribo-testers for predicting metal cutting friction
Autorzy:: Grzesik, Wit
Rech, Joel
Powiązania:: https://bibliotekanauki.pl/articles/99593.pdf
Data publikacji:: 2019
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: metal cutting
friction
tribometer
Opis:: This paper overviews some frequently used apparatus for determination of friction between the elements of tribo-pairs which represent the cutting tool and the workpiece materials. The three methods which utilize different measuring techniques are outlined and some construction details of tribotesters are presented. The main advantages and disadvantages of the closed and open tribosystems along with their practical applications in machining are highlighted.
Źródło:: Journal of Machine Engineering; 2019, 19, 1; 62-70
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Finite Element Modelling of burr formation in metal cutting
Autorzy:: Pres, P.
Skoczyński, W.
Stembalski, M.
Powiązania:: https://bibliotekanauki.pl/articles/99655.pdf
Data publikacji:: 2014
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: orthogonal cutting
burr
FEM simulation
Opis:: The paper presents a two-dimensional FEM model of burr formation in metal cutting. Abaqus/Explicit software was used for the build of the model. The workpiece geometry, the tool and the cutting parameters were modelled. Physical properties and the method of deformation and fracture of the workpiece material is described using Johnson Cook's constitutive law and the ductile damage criterion. The simulation of the edge formation process during orthogonal cutting was carried out for different depths of cut and cutting speeds. The results of these simulations allowed the verification of the FEM model. The components of the resultant cutting force measured during the actual cutting process with the values of these forces determined based on FEM simulation of this process were compared. The geometry of burrs formed during the actual and simulated the edge forming process was assessed. The analysis showed that the FEM model built enabled a correct prediction of the shape of the workpiece edge and the estimation of geometric features of the edge.
Źródło:: Journal of Machine Engineering; 2014, 14, 2; 27-37
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Hazard analysis and risk assessment in metal cutting process
Autorzy:: Kotus, Martin
Drlička, Róbert
Mikuš, Rastislav
Žarnovský, Jozef
Powiązania:: https://bibliotekanauki.pl/articles/2064921.pdf
Data publikacji:: 2019
Wydawca:: STE GROUP
Tematy:: safety
threat
risk rate
manufacturing plant
band saw
Opis:: The paper deals with the issue of occupational health and safety in a metalworking manufacturing organization. Hazard and threat have been defined when cutting metal materials with a band saw. We assessed the risk by an extended point method, where we determined the risk rate values. In most cases of sawmill work, we found a “moderate” or “negligible” risk. The highest, ‘serious’ risk we found in a possible electric shock. In this case, we have also taken the necessary actions. As a precaution, we have also proposed safety measures for other threats.
Źródło:: Multidisciplinary Aspects of Production Engineering; 2019, 2, 1; 382--391
2545-2827
Pojawia się w:: Multidisciplinary Aspects of Production Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Hardfacing of metal-cutting tools by arc welding in vacuum
Autorzy:: Ferdinandov, N. V.
Gospodinov, D. D.
Powiązania:: https://bibliotekanauki.pl/articles/368817.pdf
Data publikacji:: 2020
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: tool materials
wear resistance
hardfacing
heat treatment
hollow cathode arc
materiały narzędziowe
odporność na zużycie
napawanie
obróbka cieplna
katoda wnękowa łukowa
Opis:: Purpose: To present a technology for hardfacing of metal-cutting tools by arc welding in vacuum. Design/methodology/approach: The experiments were carried out using an installation for arc welding in vacuum. Objects of research were metal cutting tools (lathe knives), made of high-speed steel HS6-5-2 on a base metal of structural steel C45. The structure, hardness and wear resistance after hardfacing and after a triple tempering at 560°C have been determined. The heat resistance of the obtained instruments has been examined. Findings: The microstructural analysis showed that the structure of the built-up layer consisted of martensite, retained austenite and carbides. This was confirmed by the values of measured hardness after welding which were about 63-64 HRC. The triple tempering led to an increase in hardness by 3-4 HRC. It was found that the built-up layers (cutting edges of tools) retain their hardness (HRC=63-65) up to a temperature of 615-620°C, which shows that the heat resistance of the build-up layers was similar to that of the hardened and tempered tools of the same steel. The built-up work-pieces (excluding heat treated) and the reference knife showed the same cutting qualities at cutting speeds in the range of 55 to 120 m/min. It has been found that triple tempering after hardfacing led to increased wear resistance and consequently the durability of the tool also increased due to the higher hardness. Practical implications: The practical application is related to the production of metalcutting tools. Originality/value: The proposed technological method allows to produce defects free built-up layers. The cutting properties of the built-up in vacuum layers are comparable to or better than those of new tools made of steel HS 6-5-2.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2020, 99, 2; 49-56
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelling of heat generation and transfer in metal cutting: a short review
Autorzy:: Grzesik, Wit
Powiązania:: https://bibliotekanauki.pl/articles/99786.pdf
Data publikacji:: 2020
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: metal cutting
heat
modelling
Opis:: This paper overviews thermal fundamentals in metal cutting process for the determination of the amount of heat in the cutting zone which represents the interfaces between the cutting tool, the chip and the workpiece materials. Different measuring and predicting techniques of the tool-chip contact temperature and corresponding heat flux based on the estimated heat partition are outlined. The main focus was on the differently coated cutting tools and their role in controlling thermal behaviour of the cutting process. The computed algorithms for analytical and numerical methods as well as their main advantages and disadvantages, and practical applications in machining are overviewed. A number of practical solutions obtained in the Department of Manufacturing Engineering, TU of Opole are presented.
Źródło:: Journal of Machine Engineering; 2020, 20, 1; 24-33
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Hybrid machining: abrasive waterjet technologies used in combination with conventional metal cutting
Autorzy:: Wanner, B.
Archenti, A.
Nicolescu, C. M.
Powiązania:: https://bibliotekanauki.pl/articles/99485.pdf
Data publikacji:: 2017
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: hybrid processing
abrasive waterjet
thin-wall milling
sustainability
Opis:: Abrasive Waterjet technology is one of the fastest growing metal cutting technologies. Even so, very little published material is available on hybrid processing where abrasive waterjet cutting is one of two or more metal cutting methods. There is also limited published material on thin-walled components cut with abrasive waterjet technology. This paper makes a comparison of conventional metal cutting methods to the more unconventional abrasive waterjet technique. It will serve as a stepping stone in building knowledge aiding in hybrid machining development. It will show the possibilities and limitations during milling of thin-walled Aluminum components and then compare this to the capabilities of abrasive waterjet cutting the same components. Differences in material removal and revert control as well as in vibrations and force requirements will be reviewed. In addition, the environmental issues will be discussed and it will be determined which of the methods is more sustainable. The paper also includes a large section on process methodology.
Źródło:: Journal of Machine Engineering; 2017, 17, 3; 85-96
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Investigation and assessment of occupational risk on the metal cutting machine tool stand
Autorzy:: Józwik, J.
Pietras, P.
Powiązania:: https://bibliotekanauki.pl/articles/102925.pdf
Data publikacji:: 2013
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: occupational risk
metal cutting machine tools
acoustic hazard
vibrations
occupational risk assessment forms
Opis:: The paper analyzes occupational risk at selected metal cutting machine tool stands (turning, milling, drilling and grinding stands) and presents a set of recommendations formulated to minimize hazards at the above mentioned stands. The assessment is based on the analysis that allowed for selecting the best method of occupational risk assessment, measurements, observations, interviews and conclusions drawn from the obtained results. Occupational risk assessment forms were devised, what allowed for selecting appropriate action to increase the safety of selected machinery operators. The guidelines were assessed in terms of their practical implementation and expected utilitarian results.
Źródło:: Advances in Science and Technology. Research Journal; 2013, 7, 20; 47-54
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Application of response surface methodology and fuzzy logic based system for determining metal cutting temperature
Autorzy:: Tanikić, D.
Marinković, V.
Manić, M.
Devedžić, G.
Ranđelović, S.
Powiązania:: https://bibliotekanauki.pl/articles/199818.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: machining
cutting temperature
infrared thermography
response surface methodology
fuzzy logic
obróbka
temperatura cięcia
termografia w podczerwieni
metodologia odpowiedzi powierzchni
logika rozmyta
Opis:: The heat produced in metal cutting process has negative influence on the cutting tool and the machined part in many aspects. This paper deals with measurement of cutting temperature during single-point dry machining of the AISI 4140 steel, using an infrared camera. Various combinations of cutting parameters, i.e. cutting speed, feed rate and depth of cut lead to different values of the measured cutting temperature. Analysis of the measured data should explain the trends in temperature changes depending on changes in the cutting regimes. Furthermore, the temperature data is modelled using response surface methodology and fuzzy logic. The models obtained should determine the influence of cutting regimes on cutting temperature. The main objective is the reduction of cutting temperature, i.e. enabling metal cutting process in optimum conditions.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2016, 64, 2; 435-445
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

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

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Skocz do pozycji: 10.

Tytuł:: Sposoby ograniczenia zużycia energii przez obrabiarki skrawające do metali
Methods of power consumption reduction in metal cutting machines
Autorzy:: Stembalski, M.
Powiązania:: https://bibliotekanauki.pl/articles/2071272.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: obrabiarka
oszczędność energii
redukcja mas
machine tool
conservation energy
mass reduction
Opis:: W artykule przedstawiono potrzebę oszczędności energii w przemyśle, ze względu na koszty i ochronę środowiska. Wyznaczono obszary występowania strat energii w obrabiarkach i systemach wytwórczych. Ponadto omówiono możliwości wpływania na redukcję zużycia energii. Opisano sposoby zmiany struktury obrabiarek, redukcję ruchomych mas w obrabiarkach oraz tzw. „dematerializację".
Necessity of energy consumption reduction in the industry is presentee this paper. An area of machine tools' and production systems' energy we is determined and opportunities for its reduction are discussed. Methods machine tool structural change, movable mass reduction and so called materialisation are described.
Źródło:: Inżynieria i Aparatura Chemiczna; 2010, 5; 107-108
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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