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

五轴加工中非线性误差的检测和处理方法

北京航空航天大学机械工程及自动化学院, 北京 100191

基金项目: 中国航空第一集团创新基金资助项目(CX03007)

详细信息

中图分类号: TP 391
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- 文章访问数: 3248
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- 被引次数: 0
出版历程
- 收稿日期: 2007-08-02
- 网络出版日期: 2008-09-30

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

School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

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.
- 加工 /
- 插补 /
- 误差检测 /
- 机床
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.
- machining /
- interpolation /
- error detection /
- machine tools

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参考文献(1)

[1] 周济,周艳红.数控加工技术 [M].北京:国防工业出版社, 2002:200 Zhou Ji, Zhou Yanhong. Technology of NC machining [M]. Beijing: National Defence Industry Press, 2002:200(in Chinese) [2] Bohez E L J. Compensating for systematic errors in 5-axis NC machining[J]. Computer Aided Design, 2002, 34(5):391-403 [3] 周济,周艳红.五坐标数控加工的理论误差分析与控制[J].机械工程学报, 1999, 35(5):54-57 Zhou Ji, Zhou Yanhong. Analysis and control of the theoretical error in five-axis NC machining[J]. Chinese Journal of Mechanical Engineering, 1999, 35(5):54-57(in Chinese) [4] 范冬青,张洪.曲面数控加工中的非线性误差[J].机械设计与制造, 2004, 35(4): 35-37 Fan Dongqing, Zhang Hong. Non-linear error in the NC machining of free surface[J]. Machinery Design & Manufacture,2004,35(4):35-37(in Chinese) [5] Ramesh R, Mannan M A, Poo A N. Error compensation in machine tools-a review: Part I: geometric, cutting-force induced and fixture-dependent errors[J]. International Journal of Machine Tools and Manufacture,2000,40(9):1235-56 [6] Ho Mingche, Hwang Yeanren, Hu Chang-hsia. Five-axis tool orientation smoothing using quaternion interpolation algorithm[J]. International Journal of Machine Tools and Manufacture,2003,43(4):1259-1267 [7] Munlin M, Makhanov S S, Bohez E L J. Optimization of rotations of a five-axis milling machine near stationary points[J]. Computer Aided Design,2003,36(7):1117-1128 [8] Affouard A, Duc E, Lartigue C,et al. Avoiding 5-axis singularities using tool path deformation[J]. International Journal of Machine Tools and Manufacture,2004,44(4):415-425 [9] Knut Srby. Inverse kinematics of five-axis machines near singular configurations[J]. International Journal of Machine Tools and Manufacture,2007,47(2):299-306 [10] Anotaipaiboon W, Makhanov S S, Bohez E L J. Optimal setup for five-axis machining[J]. International Journal of Machine Tools and Manufacture,2006,46(9):964-977

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