陶瓷球轴承接触角和预紧力对高速磨削电主轴静刚度的影响  

Impacts of Contact Angle and Preload of Ceramic Ball Bearing on the Static Stiffness of High-speed Grinding Motorized Spindle

作　　者：王建平[1] 马福贵[1] 刘宏昭[1] 曹宏瑞[2] 卢鹏[1] 刘成龙[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048 [2]西安交通大学机械工程学院,西安710049

出　　处：《机械科学与技术》2014年第7期1018-1022,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51275408);国家科技重大专项项目(2010ZX04014-012);中央高校基本科研业务费专项项目(CHD2011SY006)资助

摘　　要：陶瓷球轴承作为电主轴的核心部件,其结构参数对电主轴的静刚度有着重要的影响。基于角接触球轴承径向刚度计算公式,通过仿真分析研究了接触角和预紧力对电主轴静刚度的影响。通过建立的主轴-轴承系统三维有限元模型,仿真获得了不同接触角和预紧力下主轴前端径向变形及主轴静刚度,进而根据有限元仿真结果拟合得到了主轴静刚度关于接触角和预紧力的拟合方程及拟合曲线。As a core component of electric spindle, ceramic ball bearings as well as its structure parameters play a critical role to the static stiffness of spindle. The impacts of contact angle and preload of ceramic ball bearing on the static stiffness of high-speed grinding motorized spindle are studied in this article using finite element method and simulation skills based on angular contact ball bearing stiffness computational formula. The three-dimensional finite element model of the spindle-bearing system is built. Radial deformations of spindle front-end and the spindle static stiffness with various contact angles and bearing preloads are obtained. The fitting curves and formulas, which could be benefit to electronic spindle bear selection and structure parameters design, are figured out according to the simulated results.

关 键 词：电主轴 陶瓷球轴承 接触角 预紧力 拟合方程 

分 类 号：TH133.33[机械工程—机械制造及自动化]