非正交五轴数控机床旋转轴误差辨识方法的研究∗

摘要

针对国内外对于非正交数控机床的斜摆轴B轴误差辨识研究较少问题，基于多体系统理论建立非正交五轴数控机床运动误差模型，此模型包含了旋转轴B轴的共计12项静态误差和动态误差，在对此运动误差模型进行数学表达与分析后，结合Renishaw公司的QC10球杆仪测量方式设计了8种不同测量模式。最后结合测量结果可实现斜摆轴B轴的12项误差辨识，快速高效。经试验验证，这种辨识方法测量结果精确，可用于非正交五轴数控机床旋转轴误差辨识。%Considering the fact that there is not enough study on the identification of the geometric deviations generated by inclined pendulum shaft axis B of nonorthogonal five axis nc machine tool at home and abroad, establish nonorthogonal five axis nc machine tool motion deviations model based on the multi-body system theory which takes rotation axis B static deviations and dynamic deviations totaling 12 into consideration. Af-ter analyzing the mathematical expression of motion deviations model and combining Renishaw company QC10 instrument,eight different measurement model is designed. At last,combined with the measuredment results,the 12 geometric deviations of pendulum shaft axis B can be identified fast and efficiently. This method has been verified by experiments, which can be applied into the identification for nonorthogonal five axis nc machine tool.