中国机械工程2017，Vol.28Issue(11)：1326-1332,7.DOI:10.3969/j.issn.1004-132X.2017.11.012
数控机床工作台误差综合补偿方法研究
Study on Combined Error Compensation Method for CNC Machine Worktables
摘要
Abstract
To avoid of the relative position problems changing between the worktable and the main spindle of any CNC machine because of geometric errors and thermal errors.The error data at differ-ent temperatures were obtained through experiments,the rules of the flatness errors on worktables were obtained remaining unchanged with the thermal deformation,and a kind of comprehensive com-pensation method of the flatness error and thermal error on worktables of CNC machine tool was pro-posed.In this method,the flatness error model and thermal error model were established separately, then the comprehensive error compensation model was established by using the superposition princi-ple.The principle's defects of the traditional fixed point model compensation method were corrected. Based on the real-time temperature values of the key parts of CNC machine and the real-time coordi-nate values of the tool positions,the error compensation values of each stage of the whole working ta-ble were calculated.And then the real-time compensation of the overall axial errors of the spindle on the whole working table was realized.The accuracy of CNC machine are improved by using the pro-posed thermal error compensation method.Compared with the traditional single point thermal error compensation method,the standard deviation of the integrated model is reduced by about 7μm after analysis,and the accuracy ratio is up to 50%.The maximum compensation residual is reduced by about 11μm,the accuracy ratio of lift is up to 60%.关键词
数控机床工作台/平面度误差模型/热误差模型/综合模型Key words
CNC machine worktable/flatness error model/thermal error model/combined error model分类
矿业与冶金引用本文复制引用
苗恩铭,徐建国,吕玄玄,魏新园..数控机床工作台误差综合补偿方法研究[J].中国机械工程,2017,28(11):1326-1332,7.基金项目
国家自然科学基金资助重大项目(51490660,51490661) （51490660,51490661）
国家自然科学基金资助项目(51175142,E051102) （51175142,E051102）
