5轴数控机床空间误差模型及辨识方法研究

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英文篇名：Researchon Spatial Error Model and Identification Methodof Five Axis CNC Machine Tool 作者：左维 ; 李巍 英文作者：ZUO Wei;LI Wei;School of Mechanical Engineering ,Tianjin Sino-German University of Applied Sciences; 关键词：五轴机床 ; 插补误差 ; 空间误差 ; 误差模型 ; 辨识研究 英文关键词：five axis machine tool;;interpolation error;;spatial error;;error model;;identification research 中文刊名：ZHJC 英文刊名：Modular Machine Tool & Automatic Manufacturing Technique 机构：天津中德应用技术大学机械工程学院; 出版日期：2019-02-20 出版单位：组合机床与自动化加工技术 年：2019 期：No.540 基金：天津市自然科学基金(17JCTPJC48800) 语种：中文; 页：ZHJC201902012 页数：4 CN：02 ISSN：21-1132/TG 分类号：50-53

摘要

对于5轴数控机床而言,多轴插补存在着大量的耦合现象,对于空间误差主要存在着进给轴直线误差与旋转轴旋转误差。依据原有的辨识方法,大多改变球杆仪安装高度与球杆仪长度方法,该方法容易在调整过程中加入干扰误差,导致求解结果不准确。文章提出了一种改变球杆仪工作空间轨迹的方法,并依据此方法进行空间误差建模工作。在使用球杆仪的基础上,结合激光干涉仪,可同时进行两个坐标系共12项误差元素的辨识,经试验结果验证,可求得刀具坐标系与工作台坐标系旋转误差元素精确解。
        There is a large number of coupling phenomena in multi axis interpolation for five axis CNC machine tool. There are mainly linear error factors and rotation error factors in feed axis. The most used method is changing the height and length of the ball bar installation. This method has high risk for add interference error in the adjustment process,which will lead an inaccurate solution result. A method of changing the working space trajectory of a ball bar instrument is proposed,and the space error modeling work is carried out by this method. Combined with laser interferometer,two coordinate systems cotain 12 error elements can be identified at the same time. The experimental results verify that the accurate solution of the rotary error elements in the tool coordinate system and the workbench coordinate system can be obtained.

引文

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