设计参数不确定条件下滚动直线导轨运动性能分析  

Analysis of Motion Performance of Rolling Linear Guide Under Uncertain Design Parameters

作　　者：李云峰[1] LI Yunfeng(School of Mechanical and Electrical Engineering,Sanjiang University,Nanjing 210012,China)

机构地区：[1]三江学院机械与电气工程学院,南京210012

出　　处：《组合机床与自动化加工技术》2024年第3期68-72,共5页Modular Machine Tool & Automatic Manufacturing Technique

摘　　要：为了研究几何参数不确定性对直线导轨动态运动性能的影响,用区间数表示几何参数的不确定性。基于赫兹接触理论,分析滚动直线导轨实际受载情况,建立了二自由度动力学分析模型,求解得到滚动直线导轨水平方向和垂直方向动态位移;根据直线导轨精度等级,确定水平和垂直方向位移公差范围。通过对比实际动态位移与位移公差范围,得到了直线导轨水平方向和垂直方向上动态位移位于运动公差合理区间内的时间占比。通过对不同精度等级的SHS-45R直线导轨的分析可以得到,随着导轨精度等级的提高,水平和垂直方向上动态位移位于运动公差合理区间内部的比例逐渐变小。In order to research the impact of geometric parameter uncertainty on the dynamic motion performance of linear guides,interval numbers are used to represent the uncertainty of geometric parameters.Based on the Hertz contact theory,the actual load situation of the rolling linear guide is analyzed,and the two degree of freedom dynamic analysis model is established to solve the dynamic displacement in the horizontal and vertical directions of the rolling linear guide.The horizontal and vertical displacement tolerance range is determined based on the accuracy level of the linear guide.By comparing the actual dynamic displacement with the displacement tolerance range,the time proportion of dynamic displacement in the horizontal and vertical directions of the linear guide within a reasonable range of displacement tolerance was obtained.Through the analysis of SHS-45R linear guide with different accuracy levels,it can be concluded that as the accuracy level of the line guide increases,the proportion of dynamic displacement in the horizontal and vertical directions within the reasonable range of displacement tolerance becomes smaller and smaller.

关 键 词：滚动直线导轨 不确定性 区间数 运动特性 

分 类 号：TH161[机械工程—机械制造及自动化] TG506[金属学及工艺—金属切削加工及机床]