Temat: spindle unit - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Thermal model of the spindle drive structure
Autorzy:: Winiarski, Z.
Kowal, Z.
Kwaśny, W.
Ha, J.-Y.
Powiązania:: https://bibliotekanauki.pl/articles/99430.pdf
Data publikacji:: 2010
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
spindle unit temperature
thermal deformations
model
Opis:: A computation system dedicated for machine tool spindle drives is presented which integrates a FDM model with a FEM model. Modelling of heat exchange through coolers are discussed, as well as modelling of heat exchange between cooling-lubricating oil and gear transmissions, shafts and headstock walls. In modelling of heat exchange inside headstock, the use of additional elements - type "Fluid" and "Air" - is proposed. Sample modelling results are presented concerning a headstock from a drilling-milling machine tool for machining with high loads and are compared with experimental data.
Źródło:: Journal of Machine Engineering; 2010, 10, 4; 41-52
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Accuracy of spindle units with hydrostatic bearings
Autorzy:: Fedorynenko, D.
Sapon, S.
Boyko, S.
Powiązania:: https://bibliotekanauki.pl/articles/386560.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: spindle
hydrostatic bearing
spindle unit
adjustable hydrostatic bearing
machining accuracy
trajectory
bearing surface imperfection
wrzeciono
łożysko hydrostatyczne
dokładność obróbki
trajektoria
powierzchnia nośna
Opis:: The work is devoted to the research ofprecision regularities in a spindle unit by the trajectory of the spindle installed on hydrostatic bearings.The mathematical model of trajectories spindle with lumped parameters that allows to define the position of the spindle with regard the simultaneous influence of design parameters, geometrical deviations ofform, temperature deformation bearing surfaces, the random nature of operational parameters and technical loads of hydrostatic bearings has been developed. Based on the results of numerical modeling the influence of shape errors of bearing surface of hydrostatic bearing on the statistical characteristics of the radius vector trajectories of the spindle by varying the values rotational speed of the spindle and oil pressure in front hydrostatic bearing has been developed. The obtained statistical regularities of precision spindle unit have been confirmed experimentally. It has been shown that an effective way to increase the precision of spindle units is to regulate the size of the gap in hydrostatic spindle bearings. The new design of an adjustable hydrostatic bearing, which can improve the accuracy of regulation size gap has been proposed.
Źródło:: Acta Mechanica et Automatica; 2016, 10, 2; 117-124
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Thermal error modeling of spindle and dynamic machining accuracy reliability analysis of CNC machine tools based on IA and LHSMC
Autorzy:: Zhang, Ziling
Feng, Shuo
Ding, Yan
Mei, Xiao
Tao, Zhiqiang
Powiązania:: https://bibliotekanauki.pl/articles/2057984.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: electric spindle unit
thermal error
latin hypercube sampling monte carlo method
finite element simulation
machining accuracy reliability
Opis:: Machining accuracy reliability as a key index of CNC machine tools is seriously influenced by the geometric and thermal errors. In the paper, a spindle unit thermal error modeling and machining accuracy reliability analysis method is proposed. By analyzing the heat generation mechanism, a thermal error model was developed to describe the thermal deformation of the electric spindle. Based on the immune algorithm (IA), the heat generation power and the heat transfer coefficient were optimized, and the thermal error was obtained by finite element thermal-mechanical coupling. By adopting the multi-body system theory (MBS), a dynamic machining accuracy model was put forward including the geometric and thermal errors. Based on the Latin hypercube sampling Monte Carlo method (LHSMC), a machining accuracy reliability analysis method was proposed to characterize the machining accuracy reliability considering the geometric and thermal errors. The method was employed to a machine tool, and the experimental results indicate the verification and superiority of the method.
Źródło:: Eksploatacja i Niezawodność; 2022, 24, 1; 100--113
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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