北京航空航天大学学报 ›› 2008, Vol. 34 ›› Issue (09): 1003-1006.

• 论文 • 上一篇    下一篇

五轴加工中非线性误差的检测和处理方法

王丹,陈志同,陈五一   

  1. 北京航空航天大学 机械工程及自动化学院, 北京 100191
  • 收稿日期:2007-08-02 出版日期:2008-09-30 发布日期:2010-09-17
  • 作者简介:王 丹(1982-),男,河北定州人,博士生,wangpick@163.com.
  • 基金资助:

    中国航空第一集团创新基金资助项目(CX03007)

Detection and control of non-linear errors in 5-axis machining

Wang Dan, Chen Zhitong, Chen Wuyi   

  1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2007-08-02 Online:2008-09-30 Published:2010-09-17

摘要: 非线性误差是多轴数控加工中加工误差的重要来源,在多轴加工中不可避免.在对前人工作分析的基础上,提出了一种在机床后置处理中减小机床过大非线性误差的算法,该方法通过对机床旋转轴的变化量进行监测,找出存在过大非线性误差的刀位点,并使用线性插值的方法进行修正.对修正前后的变化量进行了对比,结果显示该方法能显著的减小加工的非线性误差.同时该方法计算过程简单并且可以统一处理机床的一般非线性误差和后置奇异点处的非线性误差.仿真结果亦表明此方法切实可行.

Abstract: Non-linear error is an important source of the machining error in multi-axis numerical controlled machining and it is unavoidable. A new strategy to deal with the non-linear error was proposed based on the analysis of former work. In the new strategy the tool positions with large non-linear errors were found out by detecting the movements of rotatory axes of the 5-axis machine tool and then the non-linear errors were compensated by linear interpolation. Comparison work between the original data and compensated data was done and the results show that the proposed strategy could notablely reduce the non-linear error. The strategy proposed could deal with non-linear errors of both general type and the special type which occur at singular position of the machine tool. Simulation results indicate the simplicity and feasibility of the strategy.

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