高速电主轴动态特性研究  

Study on Dynamic Characteristic of High Speed Motorized Spindle

作　　者：杨钢[1] 

机构地区：[1]重庆交通大学机电与汽车工程学院,重庆400074

出　　处：《机械传动》2014年第8期13-17,共5页Journal of Mechanical Transmission

基　　金：国家自然科学基金(51005259)

摘　　要：作为数控机床的核心功能部件,高速电主轴的动力学特性直接影响着工件的加工精度。建立了高速电主轴的轴承-转子动力学模型,计算了角接触球轴承的动态支承刚度和轴承-转子系统的固有特性,并且研究了不同转速下轴承支承刚度对系统固有频率的影响。以2GDZ60型高速电主轴为研究对象,测试了系统的1阶固有频率和2阶固有频率,与理论计算值相比较误差较小。The dynamical characteristics of high speed motorized spindle,which are the core components of numerical control machine tools,has a great influence on the machining precision of workpiece.A bearing-rotor dynamical model for high-speed motorized spindle is established,the dynamic stiffness of angular contact ball bearings and inherent characteristics of bearing-rotor system are calculated.The influence of the dynamic stiffness of bearings on the inherent frequency of system under different speeds is researched.Finally,taking an experiment on a 2GZD60 type motorized spindle as study object,the first order natural frequency and second order natural frequency are test,and the error is small between it and theoretical calculating value.

关 键 词：高速电主轴 动态特性 轴承-转子系统 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]