串并混联机床几何误差建模与实验

doi:10.13229/j.cnki.jdxbgxb201701020

摘要/Abstract

摘要： 以多体系统理论为基础,研究了串并混联机床的几何误差。考虑各运动轴的定位误差、直线度误差、角度误差以及垂直度误差的综合作用,提出一种机床综合误差建模方法。通过对该机床各部件拓扑结构进行抽象化描述,推导出混联机床两相邻体间相对运动的特征矩阵,建立了混联机床的整机综合误差模型。利用激光干涉仪对X、Y轴多项几何误差进行测量,并将测得的几何误差带入综合误差模型。通过分析所测的各项几何误差以及综合误差分布和演变规律发现:X、Y轴定位误差对整机综合误差的影响最大,直线度误差次之,角度误差影响最小;在精度要求不高的情况下,角度误差对综合误差的影响可忽略。

关键词: 机械制造自动化, 综合误差模型, 几何误差, 串并混联机床

Abstract: The spatial geometric error of hybrid serial-parallel machine tool is modeled and investigated. This synthesis error model is based on multi-body system and the consideration of the combined effect of positioning errors, straightness errors, squareness errors and angular errors of each axis. With substantial data measured by laser interferometer, the distribution maps of some errors are drawn. By choosing a planned curve on the surface of workpiece and moving each axis with errors, the spatial geometric error appears and is illustrated on Matlab. Further, by decomposing the spatial geometric errors along each axis of spatial coordinate and comparing with position errors of the corresponding axis, a conclusion is drawn that both errors have close value and the same distribution trend. The positioning errors have the greatest impact on the synthesis error, followed by the straightness errors. The impact of the angular errors on the synthesis error can be ignored.

Key words: mechanical manufacturing automation, synthesis error model, geometric error, hybrid serial-parallel machine tool

中图分类号:

TH161

曲兴田, 赵永兵, 刘海忠, 王昕, 杨旭, 陈行德. 串并混联机床几何误差建模与实验[J]. 吉林大学学报(工学版), 2017, 47(1): 137-144.

QU Xing-tian, ZHAO Yong-bing, LIU Hai-zhong, WANG Xin, YANG Xu, CHEN Hang-de. Modeling and experiment of spatial geometric errors of hybrid serial-parallel machine tool[J]. 吉林大学学报(工学版), 2017, 47(1): 137-144.

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