Enhancement of geometric accuracy of five-axis machining centers based on identification and compensation of geometric deviations
Enhancement of geometric accuracy of five-axis machining centers based on identification and compensation of geometric deviations
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DOI：
10.1016/j.ijmachtools.2012.12.008
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发表时间：
2013-05
影响因子：
14
通讯作者：
M. Tsutsumi;Shintaro Tone;Noriyuki Kato;R. Sato
中科院分区：
文献类型：
--
作者：
M. Tsutsumi;Shintaro Tone;Noriyuki Kato;R. Sato
本文介绍了利用倾斜转台提高五轴加工中心运动精度的方法。五轴机床固有的几何偏差是通过在三轴同步运动中两种不同设置的球杆测量的实际轨迹来校准的。从测量次数的角度来看，使用柱坐标系的测量优于使用笛卡尔坐标系的测量。为了验证标定方法的有效性，通过对锥体截割数控数据的后处理，对圆柱坐标系下测量到的固有几何偏差进行了校正。利用球棒检测刀具中心点与工件之间的相对位移。实验结果表明，修正固有几何偏差后，三维圆轨迹的半径、圆心位置和圆度都得到了改善。
The present paper describes the enhancement of kinematic accuracy of five-axis machining centers with a tilting rotary table. Geometric deviations inherent to the five-axis machine are calibrated through the actual trajectories measured by two different settings of a ball bar in simultaneous three axis motion. Measurement using a cylindrical coordinate system is superior to measurement using a Cartesian coordinate system from the viewpoint of the number of measurements. In order to verify the effectiveness of the calibration method, the inherent geometric deviations measured on the cylindrical coordinate system were corrected through the post processing of NC data for cutting the cone-frustum. The relative displacement between the tool center point and the workpiece was detected by the ball bar. Based on the experimental results, it is confirmed that the radius, center position, and roundness of the three-dimensional circular trajectory are improved when the inherent geometric deviations are corrected.