数控机床XY工作台动态定位误差分析与建模  

Dynamic Positioning Error Analysis and Modeling of CNC Machine Tools XY Working Table

作　　者：杨洪涛[1] 庞勇军 李莉 陈邦晟 YANG Hong-tao;PANG Yong-jun;LI Li;CHEN Bang-sheng(School of Mechanical Engineering,Anhui University of Science And Technology,Huainan Anhui 232001,China)

机构地区：[1]安徽理工大学机械工程学院,安徽淮南232001

出　　处：《组合机床与自动化加工技术》2019年第2期41-44,48,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(51675004)

摘　　要：为了研究不同运动速度下数控机床XY工作台动态定位误差的变化规律,详细分析了XY工作台运动速度和摩擦特性影响下的的动态定位误差来源,建立了光栅测量系统、滚珠丝杆组件、导轨系统制造、安装质量和摩擦力等误差源引起的动态定位误差分量精确计算模型,搭建了实验装置,测量了在所需运动速度下的俯仰角和偏摆角,精确计算了工作台的定位误差值,同时分析了XY工作台动态定位误差受运动速度影响的变化规律。根据实验结果可知,文章研究的数控XY工作台动态定位误差受到运动速度影响,不同运动速度下的动态定位误差不同,存在着最佳测量速度,为提高数控机床的动态加工精度和在机测量系统的测量精度打下良好的理论基础。In order to study the variation principle of dynamic positioning error of XY working table under different moving speed,the dynamic positioning error sources of the CNC machine tools XY working table under the changing moving speed and friction characteristics were analyzed in detail.The accurate theoretical calculation models of dynamic positioning error components caused by grating measurement systems,ball screw assemblies,rail system manufacturing error,installation quality,and frictional forces were established.The experimental device was set up to measure the required pitch and yaw angles under different moving speeds.The position errors of the XY working table under different moving speeds were accurately calculated by using the above theoretical calculation models and the measured moving speeds,pitch and yaw angles.The variation principle between the dynamic positioning errors of XY working table and the moving speeds was analyzed.According to the experimental results,the dynamic positioning error of the XY working table is affected by the moving speeds and the dynamic positioning errors under different moving speeds are different.There exists an optimal moving speed.The above researched results provide theoretical basis to improve the dynamic machining accuracy of CNC machine tools and the measurement accuracy of the on-machine measurement system.

关 键 词：XY工作台 动态定位误差 最佳运动速度 

分 类 号：TH165[机械工程—机械制造及自动化] TG659[金属学及工艺—金属切削加工及机床]