东北大学学报(自然科学版) ›› 2024, Vol. 45 ›› Issue (5): 675-682.DOI: 10.12068/j.issn.1005-3026.2024.05.009

• 机械工程 • 上一篇    

考虑热误差的电主轴建模与可靠性全局灵敏度分析

黄贤振1,2, 于瑞1, 姜智元1, 荣治明3   

  1. 1.东北大学 机械工程与自动化学院,辽宁 沈阳 110819
    2.东北大学 航空动力装备振动及控制教育部重点实验室,辽宁 沈阳 110819
    3.大连海洋大学 应用技术学院,辽宁 大连 116300
  • 收稿日期:2023-05-15 出版日期:2024-05-15 发布日期:2024-07-31
  • 作者简介:黄贤振(1982-),男,山东定陶人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(U22B2087);辽宁省应用基础研究计划项目(2023JH2/101300160);辽宁省教育厅高校基本科研资助项目(LJKQZ2021124)

Modeling and Reliability Global Sensitivity Analysis of Motorized Spindles Considering Thermal Errors

Xian-zhen HUANG1,2, Rui YU1, Zhi-yuan JIANG1, Zhi-ming RONG3   

  1. 1.School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China
    2.Key Laboratory of Vibration and Control of Aero-Propulsion Systems Ministry of Education of China, Northeastern University, Shenyang 110819, China
    3.Applied Technology College, Dalian Ocean University, Dalian 116300, China. Corresponding author: RONG Zhi-ming, E-mail: rongzhiming@dlou. edu. cn
  • Received:2023-05-15 Online:2024-05-15 Published:2024-07-31

摘要:

以数控机床电主轴为研究对象,旨在分析其轴向热伸长量对电主轴可靠性的影响.采用Svenska Kullager?Fabriken(SKF)摩擦力矩模型对轴承生热量进行分析,设定对流换热系数为边界散热条件,建立了热分析有限元耦合模型,求解电主轴的温度以及轴向热伸长分布.将有限元模型与实验结果进行对比,验证了建立的有限元模型的准确性.考虑随机因素的影响,建立电主轴热变形可靠性分析模型,并采用Kriging模型进行可靠性求解.对电主轴热误差可靠性全局灵敏度进行分析,结果表明,转速和冷却水流量对可靠度影响较大,轴向力和径向力对可靠度影响较小.

关键词: 电主轴, 热特性, 有限元分析, Kriging模型, 可靠性, 全局灵敏度

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.

Key words: motorized spindle, thermal characteristics, finite element analysis, Kriging model, reliability, global sensitivity

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