Temat: machining tool - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: The impact of brazing parameters on the strength of a WC/Co-filler metal-steel joint
Wpływ parametrów lutowania na wytrzymałość połączenia WC/Co-lutowie-stal
Autorzy:: Pieczara, A.
Piotrowski, T.
Leśniewski, W.
Wawrylak, M.
Wieliczko, P.
Powiązania:: https://bibliotekanauki.pl/articles/256350.pdf
Data publikacji:: 2015
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: metal-ceramics material
brazing
machining tool
materiał metalowo-ceramiczny
lutowanie
narzędzie skrawające
Opis:: Manufacturing and geotechnical engineering utilise a number of machining tools. In their construction, a significant role is played by brazed joints, thanks to which the machining element can be made of WC/Co materials. The metal-ceramics material is joined with steel or cast steel elements with the use of filler metal, based on copper alloys. The components of filler metals are different depending on technological requirements. These may be the alloys of copper, silver, zinc, nickel, cobalt, and manganese. The article presents various techniques of brazing 40HM steel and WC/Co material with filler metal not containing zinc Cu87Mn10Co3. The experimental joints were made with the use of distance rods, steel mesh, and nickel mesh. The impact of the material that provides repeatability of the geometry of the brazing process was tested on the strength of a joint that is subjected to shear stress. The impact of distance elements is mostly positively assessed; however, in some data from publications, the impact of steel mesh is assessed negatively. In order to assess the correctness of joints, x-ray computer tomography was conducted.
Przemysł przetwórczy oraz geotechnika wykorzystują w swojej działalności olbrzymie ilości narzędzi skrawających. W ich konstrukcji znaczącą rolę odgrywa połączenie lutowane, dzięki któremu element skrawający może być wykonywany z materiałów typu WC/Co. Materiał metalowo-ceramiczny łączony jest z elementami stalowymi lub staliwnymi przy wykorzystaniu lutowi wysokotemperaturowych, bazujących na stopach miedzi. Składniki lutowi są różne i, w zależności od wymagań technologicznych, mogą to być stopy: miedzi, srebra, cynku, niklu, kobaltu oraz manganu. W artykule przedstawiono różne techniki wykonania połączenia lutowanego stali 40HM i materiału WC/Co lutowiem bezcynkowym Cu87Mn10Co3. Doświadczalne połączenia wykonywano z wykorzystaniem dystansowych drutów stalowych, siatek lutowniczych stalowych oraz niklowych. Zbadano wpływ materiału zapewniającego powtarzalność geometrii procesu lutowniczego na wytrzymałość połączenia poddanemu naprężeniu ścinającemu. Wpływ elementów dystansujących jest przeważnie oceniany pozytywnie, jednak w niektórych danych literaturowych [5] wpływ siatki stalowej oceniany jest negatywnie. Do określenia poprawności wykonanych spoin wykorzystano rentgenowski tomograf komputerowy.
Źródło:: Problemy Eksploatacji; 2015, 3; 59-64
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

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

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Skocz do pozycji: 3.

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

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Skocz do pozycji: 4.

Tytuł:: Energy-based characterization of precision hard machining using partially worn CBN cutting tools
Autorzy:: Grzesik, Wit
Denkena, Berend
Zak, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/100133.pdf
Data publikacji:: 2019
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: hard machining
CBN tool
tool wear
specific energy
Opis:: This paper highlights the performance of precision hard turning with CBN cutting tools from energy point-of-view with additional tool wear effect. For this purpose several wear tests were performed during which the tool nose wear VB_C and the corresponding changes of component forces F_c, F_f and F_p were continuously measured. Based on the measured forces and geometrical characteristic of the uncut layer, specific cutting and ploughing energy were determined for several combinations of cutting parameters. Consequently, changes of energy consumption resulting from tool wear evolution for variable feed rate, depth of cut and tool nose radius were presented.
Źródło:: Journal of Machine Engineering; 2019, 19, 2; 54-62
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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

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Skocz do pozycji: 6.

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

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Skocz do pozycji: 7.

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

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Skocz do pozycji: 8.

Tytuł:: Reconfigurable Machine Tool: Methodology of RMT Design
Autorzy:: Aladad, H.
D'Acunto, A.
Martin, P.
Powiązania:: https://bibliotekanauki.pl/articles/971118.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: reconfigurable machine
tool machine
tool design
machining feature
process planning
Opis:: Reconfigurable Machine Tool (RMT) is the active issue to realize both the flexibility and productivity of manufacturing systems and satisfy the mass-customization production. The purpose of this paper is to present a RMT design methodology. Specifically, the part analysis and the RMT architectural modelling. The method of RMT design is focused on a simultaneous machining process using multi-spindle in a single RMT. Based on the concept of machining features, the process data, retrieved as a starting point in identifying various functions necessary to carry out a given part family, are displayed. Moreover, geometrical and kinematical architectures of RMT are defined as a result of the specification of all manufacturing processes of features to be machined. Where, all architectural solutions and the criterions related to select the suited solution are presented. Our methodology presents all activities allowing to pass from machining features of part to be machined to the structure of RMT.
Źródło:: Journal of Machine Engineering; 2008, 8, 1; 19-32
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

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

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Skocz do pozycji: 10.

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

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