三坐标测量机误差测量的新方法

A NOVEL APPROACH FOR CMM ERROR MEASUREMENT

以平面圆轨迹上各点空间误差与几何误差的关系为基础，提出了一种测量三坐标测量几何误差的新方法．使用Ｒｅｎｉｓｈａｗ检查规测量ＸＹ、ＹＺ、ＸＺ平面内特定圆周上各点的空间误差，通过最小二乘法，可分解出所有２１项几何误差．这种方法操作方便、精度高，仅用２ｈ即可完成全部２１项误差的测量。

Based on the relationship between volumetric errors and geometric errors of CMM,a new method of measuring the geometric errors is developed in this paper.Through the measurement of volumetric errors on some specific circles in XY,YZ,XZ planes with a Renishaw Checking Gauge all the 21 geometric errors can be obtained by means of the least square method.The new method is accurae and easy to use.The time required for data acquisition is less than two hours.It is an effective method to improve the CMM precision by error compensation.