数控机床关键几何误差元素溯源研究  

Research on the Traceability Method of Key Geometric Error Elements of CNC Machine Tools

作　　者：李晓晓 孙付春 吴昊荣[2] LI Xiao-xiao;SUN Fu-chun;WU Hao-rong(School of Mechanical Engineering,Chengdu University,Chengdu 610106,China;School of Electronic Information and Electrical Engineering,Chengdu University,Chengdu 610106,China)

机构地区：[1]成都大学机械工程学院,成都610106 [2]成都大学电子信息与电气工程学院,成都610106

出　　处：《组合机床与自动化加工技术》2023年第1期147-151,156,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金面上项目(5217052125)。

摘　　要：基于螺旋理论对多轴数控机床空间误差建模,利用“十二线法”进行机床几何误差元素辨识实验,获得卧式加工中心的21项几何误差元素值。采用灵敏度分析法对卧式加工中心空间误差模型具有显著影响的关键几何误差元素进行了分析,其中,局部灵敏度分析法溯源出机床11项关键几何误差元素,全局灵敏度分析法溯源出12项几何误差元素。两种溯源方法得到的机床关键几何误差元素不同,但机床关键几何误差元素主要为集中在各运动轴上的线性误差,且各运动轴的转角误差的灵敏度系数均较小,验证了两种溯源方法的适用性。Based on the spiral theory,the spatial error of the multi-axis CNC machine tool is modeled,and the"twelve-line method"is used to identify the geometric error elements of the machine tool,and the 21 geometric error element values of the horizontal machining center are obtained.The sensitivity analysis method is used to analyze the key geometric error elements that have a significant impact on the spatial error model of the horizontal machining center.Among them,the local sensitivity analysis method traces out 11 key geometric error elements of the machine tool,and the global sensitivity analysis method traces out 12 geometric errors.element.The key geometric error elements of the machine tool obtained by the two traceability methods are different,but the key geometric error elements of the machine tool are mainly linear errors concentrated on each motion axis,and the sensitivity coefficient of the angle error of each motion axis is small,which verifies the two traceability.Applicability of the method.

关 键 词：多轴数控机床 几何误差元素 局部灵敏度 全局灵敏度 溯源方法 

分 类 号：TH161[机械工程—机械制造及自动化] TG502[金属学及工艺—金属切削加工及机床]