摘要
针对高速电主轴工作在力热耦合状态下,结合部刚度、阻尼、热阻等物理参数确定及结合部的精确计算困难等问题,采用分形接触理论和赫兹接触理论,研究了高速电主轴固定结合部和可动结合部的力-热耦合特性,建立了高速电主轴结构界面的物理表征方法.在此基础上,提出了一种考虑结合部特性的高速电主轴力-热耦合建模及其数值方法,并结合机床高速电主轴实验测试,验证了该方法的有效性.
High-speed spindle works in the state of thermo-mechanical coupling,and the discontinuity caused by structure interfaces has a strong influence on the dynamic behaviour of the spindle.Whereas,the predictions of stiffness,of thermal resistance and especially of the damping characteristics of joints are extremely difficult due to their dependence on many different influences,the desired calculation accuracy of joints has become the bottleneck of high-speed spindle design and performance prediction.Within this paper,based on the fractal theory and the Hertz contact theory,the thermo-mechanical coupling characteristics of high-speed spindle fixed and movable joints were studied,and an approach for the prediction of the physical characterization of joints was established.Resultantly,a new thermo-mechanical modeling of high speed spindle and numerical simulation method with joints characteristics considered were presented,and the validity of presented method has been validated by experimental calibration with a high-speed spindle of machine tool.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第10期1-5,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家科技重大专项资助项目(2013ZX04005-011)
青海省科技计划资助项目(2014-Z-Y14)
关键词
高速电主轴
结合部
物理表征
力-热耦合建模
数值方法
high-speed spindle
structure interfaces
physical characterization
thermal-mechanical modeling
numerical simulation
