一种改进的数控机床工件坐标找正方法  

A modified method on construction of the workpiece coordinate in CNC machine

作　　者：鲍晟[1,2] 冯平法[1] 崔雅文[3] 罗耀辉[3] 

机构地区：[1]北京清华大学精密仪器与机械学系,上海100084 [2]上海大学机电工程与自动化学院,200072 [3]成都飞机工业集团有限公司,成都610092

出　　处：《微计算机信息》2010年第7期1-2,5,共3页Control & Automation

摘　　要：测头测量存在随机误差,采用二点确定直线的方法进行坐标找正会带来较大误差,本文针对常用的测量垂直坐标系找正方法提出了一种改进算法,通过分别测量一组数据,采用最小二乘法拟合直线,可以较好的减小随机误差影响,得到更精确的坐标结果。The random errors exist in measuring by using touch trigger probe. Usually the workpiece coordinate can be determined by two straight lines, and the line can be determined by two points. A greater error is introduced in by using this method. A modified method is proposed in this paper to improve the accuracy of the calculation. A set of points are measured to instead of the two points, and the straight line is fitted by using least squares method to eliminate the influence of the random errors and the more precise result can be obtained.

关 键 词：数控机床 工件坐标系 测头 最小二乘法 

分 类 号：TG68[金属学及工艺—金属切削加工及机床]