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- Title
考虑热误差的电主轴建模与 可靠性全局灵敏度分析.
- Authors
黄贤振; 于 瑞; 姜智元; 荣治明
- Abstract
Taking the motorized spindle of computer numerical control machine tools as the research object, the influence of its axial thermal elongation on the reliability of the motorized spindle is explored. The Svenska Kullager‑Fabriken (SKF) friction torque model is used to analyze the heat generation of the bearing. The convective heat transfer coefficient is set as the boundary heat dissipation condition. The finite element coupling model of thermal analysis is established to solve the temperature and axial thermal elongation distribution of the spindle. The finite element model is compared with the experimental results to verify the accuracy of the established finite element model. Considering the influence of random factors, the reliability analysis model of spindle thermal deformation is established, and the reliability is solved by the Kriging model. Finally, the global sensitivity analysis of the thermal error reliability of the motorized spindle is carried out. The results show that the rotational speed and cooling water flow have a great influence on the reliability, and the axial force and radial force have little influence on the reliability.
- Subjects
NUMERICAL control of machine tools; FINITE element method; HEAT transfer coefficient; HEAT convection; THERMAL analysis
- Publication
Journal of Northeastern University (Natural Science), 2024, Vol 45, Issue 5, p675
- ISSN
1005-3026
- Publication type
Article
- DOI
10.12068/j.issn.1005-3026.2024.05.009