摘要
电主轴的结构,动态特性对数控机床的加工效率和精度的影响很大。对角接触球轴承电主轴单元进行了静刚度分析,在有限元软件ANSYS中建立了电主轴球轴承-转子系统的参数化有限元模型,并以提高电主轴的静刚度为优化目标,对电主轴的支承跨距和电机的安装位置进行了优化分析及计算,并对优化前后的电主轴系统进行了模态分析,对比其前三阶频率及振型的变化,得出了相关结论。
The dynamic characteristic of the electric spindle affects CNC machine tools significantly.The static stiffness of angular contact ball bearing is analyzed,and a parameterized finite element model of the bearing-rotor system is established in ANSYS.Choosing the static stiffness of the electric spindle as the optimization goal,support span of the spindle and motor installation location are optimized and calculated.In addition,modal analysis of the electric spindle system before and after optimization is carried out,which results are obtained through comparing the first three frequencies and modes of vibration.
出处
《机械设计与制造》
北大核心
2011年第8期90-92,共3页
Machinery Design & Manufacture
基金
国家科技重大专项课题资助"高速卧式加工中心"
关键词
电主轴
角接触球轴承
动态特性
结构优化
模态分析
Electric spindle
Angular contact ball bearing
Dynamic characteristic
Structural optimization
Modal analysis
