基于圆检验的数控机床几何误差辨识  

Identification of CNC Machine Tools' Geometric Errors Based on Circular Tests

作　　者：王民[1,2] 李家富[1] 昝涛[1] 马钢建 周霜[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院先进制造技术北京市重点实验室,北京100124 [2]电火花加工技术北京市重点实验室,北京100191

出　　处：《北京工业大学学报》2017年第1期58-64,共7页Journal of Beijing University of Technology

基　　金：国家科技重大专项(2012ZX04010021-001-004);国家自然科学基金资助项目(51575014);北京市自然科学基金资助项目(KZ201410005010)

摘　　要：为了准确地辨识出三轴立式数控机床的各项几何误差,通过多体系统理论建立了三轴立式数控机床圆运动轨迹数学模型,分析了数控机床圆检验中典型误差对机床圆运动轨迹的影响机理.考虑多种几何误差对机床圆检验运动轨迹的影响,提出了一种基于最小二乘法和多项式误差模型的几何误差辨识方法,该误差辨识方法可以辨识出三轴立式数控机床的21项几何误差.数值仿真结果表明:该误差辨识方法具有准确性和可行性.To identify the geometric errors of three-axis vertical CNC machine tools,the circular motion trajectories of three-axis vertical machine tools were modeled by using the theory of multi-body system.Based on the numerical simulations of circular motion trajectories,the influence mechanism of the typical geometric errors on the circular motion trajectories was analyzed. Considering the influence of multiple geometric errors on the circular motion trajectory,this paper put forward a geometric errors identification method,which can identify all 21 geometric errors of three-axis vertical machine tools based on the least squares method and polynomial based error modeling. Numerical simulation results demonstrate the accuracy and feasibility of this method.

关 键 词：数控机床 圆检验 几何误差辨识 

分 类 号：TH161[机械工程—机械制造及自动化]