滚珠直线导轨副精度损失模型研究
Model Study of Precision Loss of Linear Ball Guides
钟洋 1陶卫军 1韩军1
作者信息
- 1. 南京理工大学机械工程学院,南京210094
- 折叠
摘要
针对滚珠直线导轨副的精度保持性问题,对其在加载条件下的接触刚度和磨损过程进行了建模和仿真分析.基于Hertz接触理论和刚体动力学对滚珠和滚道的接触面进行了力学与变形分析,建立了滚珠直线导轨副接触刚度计算模型;运用Archard磨损理论分析了滚珠直线导轨副的磨损过程,在此基础上建立了滑块位移的计算模型,用来预测滚珠直线导轨副的磨损量.通过仿真计算和分析表明,所建立的接触刚度和磨损预测模型正确有效,能描述滚珠直线导轨副在加载条件下的精度损失规律.
Abstract
Aiming at the precision retaining ability problem of the linear ball guides,the modeling and analysis on the stiffness and wear process under load condition is studied.In this study,we analyze the contact mechanics between the ball and raceway and the deformation of the ball.We also establish a calculation model of the contact stiffness based on the Hertz contact theory and rigid body dynamics.By using the Archard wear theory,we analyze the wear process of linear ball guides.Furthermore,we develop a calculation model of the displacement of the slider,which is due to the wear loss of the slider's raceway in its reciprocating motion under loading,to predict the wear of linear ball guides.Simulations and analysis show that the established model is effective,and can describe the changing rule of the precision loss of the linear ball guides under load condition.
关键词
滚珠直线导轨副/精度损失/接触刚度/磨损预测Key words
linear ball guide/precision loss/contact stiffness/wear prediction引用本文复制引用
基金项目
国家科技重大专项(2012ZX04002-011)
出版年
2013
NETL
NSTL
维普
万方数据