Temat: machining productivity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Coupled Model of the Spindle and Machine Tool Frame
Autorzy:: Kolar, P.
Sulitka, M.
Powiązania:: https://bibliotekanauki.pl/articles/971164.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: spindle dynamic properties
machining productivity
machine frame
spindle
coupled models
modal decomposition
Opis:: Influence of the machine frame on the dynamic properties of spindle and tool is investigated using an example of a real machine tool. Model of the whole mechanical system is created as a coupled system of the tool, spindle and machine frame single submodels. Experimental verification of the model has shown a good match of the system critical frequencies and compliances. It has been proved that properties of the machine frame limit the dynamic properties at the tool tip especially in the case, if a compact tool is used.
Źródło:: Journal of Machine Engineering; 2009, 9, 2; 32-44
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Applications of metallic composites in the automotive industry and their machining by the EDM
Autorzy:: Bialo, D.
Peronczyk, J.
Skalski, A.
Powiązania:: https://bibliotekanauki.pl/articles/950159.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: aluminium matrix composites
automotive industry
electro discharge machining
EDM productivity
surface roughness
Opis:: The article deals with the problems of application of aluminium matrix composites in car industry and electro discharge machining (EDM) of selected composites, which are used for engine pistons. Composites with Al+20%Si+3%Cu+1%Mg matrix were manufacturing by the powder metallurgy route in the process of cold compaction, degassing and hot extrusion. As the reinforcing phase Al2O3 particles with average size of 3, 9, 23 and 53 μm were used. Samples had constant reinforcing phase 5 and 10 % by volume. Electro discharge machining was performed using machine equipped with RLC generator. Four modes of energy of single discharge Ei in the range of 0.165 to 2.268 mJ were applied. EDM was carried out in a free – system. The main parameters determined after machining were volumetric productivity Vw (mm3 /min) and roughness of the machined surface expressed as Ra. It was shown that energy of single discharge influence mainly on the EDM process running. The higher was Ei, the higher were value of Vw. Increasing particle granularity from 3 to 53 μm caused decreasing in process productivity 13 to 19%. Ei affects the surface roughness during EDM. The value of Ra increases as this energy increases. When the size of reinforcing particles is growing, roughness parameter Ra is also growing.
Źródło:: Journal of KONES; 2018, 25, 1; 15-23
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of the compromise between cutting tool life, productivity and roughness during turning of C45 hardened steel
Autorzy:: Abidi, Youcef
Powiązania:: https://bibliotekanauki.pl/articles/1839561.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:: obróbka twarda
zużycie narzędzi
produktywność
chropowatość powierzchni
korelacja
hard machining
tool wear
productivity
surface roughness
correlation
Opis:: Tool wear and surface roughness as performance indexes are considered to be the most important in terms of hardened materials’ machinability. The best combination of cutting parameters which enhances the compromise between tool life, productivity and machined surface quality contribute to benefice on production cost, which makes manufacturing industry interested in it. The aim of this research is to investigate the life of ceramic cutting tool and machining productivity together with surface roughness during turning of hardened steel C45, with focus on the selection of the optimal cutting parameter combination. The experiments are carried out based on uni-factorial planning methodology of cutting speeds and feed rates. The results show that the mixed ceramic tool is suitable for turning hardened steel C45 (40 HRC) and the conclusion is that it performed well in terms of tool life, productivity and surface quality at a combination of cutting speed (200 m/min), feed (0.08 mm/rev) and depth of cut (0.3 mm). Additionally, a tool life model has been proposed which is presented very high coefficient of determination.
Źródło:: Production Engineering Archives; 2021, 27, 1; 30-35
2353-5156
2353-7779
Pojawia się w:: Production Engineering Archives
Dostawca treści:: Biblioteka Nauki

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