高速电主轴支承刚度计算及模态分析  

Support Stiffness Calculation and Modal Analysis of High Speed Motorized Spindle

作　　者：吴腾庆[1] 刘恒[1] 景敏卿[1] 陈增凡[1] 樊红卫[1] 

机构地区：[1]西安交通大学机械工程学院,陕西西安710049

出　　处：《机械设计与制造》2013年第8期5-7,11,共4页Machinery Design & Manufacture

基　　金：高档数控机床与基础制造装备"国家科技重大专项(2010ZX04014-015)

摘　　要：以某型号数控磨床用高速电主轴为研究对象,基于滚动轴承静力学推导了高速电主轴常用支承—角接触球轴承计及预紧接触角变化的径向刚度和多联组配轴向刚度计算公式,结果显示该计算公式比现有文献中相关计算更准确,讨论了轴向预紧力对支承刚度的影响规律。在得到支承刚度的基础上,在ANSYS中采用弹簧单元COMBIN14模拟主轴轴承支承,基于ANSYS对主轴部件进行了不同轴向预紧力和不同转速下的模态分析,讨论了转速和轴向预紧力对电主轴模态的影响。Based on a high speed motorized spindle used in a CNC grinding machine,the more accurate formula compared to previous studies calculating the radial stiffness and combined axial stiffness of angular contact ball bearings which support the motorized spindle is derived and influence on support stiffness by axial preload is studied.After getting the support stiffness and using a spring element simulating the bearing support,a modal analysis of the spindle under different axial preload and speed based on ANSYS is carried out.The influence on modal of the motorized spindle by axial preload and rotational speed is discussed.

关 键 词：电主轴 角接触球轴承 径向刚度 组配轴向刚度 模态分析 

分 类 号：TH16[机械工程—机械制造及自动化] TG596[金属学及工艺—金属切削加工及机床]