中国机械工程2024，Vol.35Issue(6)：1023-1033,11.DOI:10.3969/j.issn.1004-132X.2024.06.008
双转台五轴数控机床旋转轴位置无关几何误差辨识
Identification of Rotary Axes PIGEs of Five-axis CNC Machines with Double Rotary Tables
摘要
Abstract
Aiming at the problems of the accuracy in identifying geometric errors of rotation axis of five-axis CNC machines with double rotary tables,an identification model of PIGEs of rotation axis on absolute coordinate system was proposed.The actual initial coordinates of the tool ball and the workpiece ball in the machine coordinate system were established,and the actual initial position of the workpiece ball in the measured axis was obtained by the inverse matrix.The mathematical model of the double ball bar length changing included installation errors and the PIGEs of the rotation axis was established based on the four measurement patterns.The effects of PIGEs on the measurement pattern were analyzed by simulation.The results show that the parallelism error may not affect double ball bar length changing when the tool ball is at the intersection of the two rotation axis.Finally,8 PIGEs of the rotary axis were identified through experiments,and 4 positional deviations of the rotary axis PIGEs were compensated.The experimental results show that the maximum absolute value of the compensated positional error is reduced from 203.5 μm to 5.1 µm,and the proposed identification model may effectively improve the accuracy of five-axis CNC machines.关键词
五轴数控机床/旋转轴/位置无关几何误差/机床坐标系/球杆仪Key words
five-axis CNC machine/rotation axis/position-independent geometric error(PIGE)/machine coordinate system/double ball bar分类
机械制造引用本文复制引用
张文斌,刘焕牢,王宇林,周恒宇..双转台五轴数控机床旋转轴位置无关几何误差辨识[J].中国机械工程,2024,35(6):1023-1033,11.基金项目
国家自然科学基金(52175458) （52175458）
广东省自然科学基金(2021A15150110591) （2021A15150110591）
广东省教育厅项目(2022ZDZX3006) （2022ZDZX3006）
