RTCP算法中无碰刀轴矢量的确定

中国机械工程 ›› 2012, Vol. 23 ›› Issue (9): 1009-1013.

RTCP算法中无碰刀轴矢量的确定

章永年;赵东标;陆永华;刘凯

南京航空航天大学,南京,210016

出版日期:2012-05-10 发布日期:2012-05-15
基金资助:
国家自然科学基金资助项目(51005122)；航空科学基金资助项目(2008ZE52049)
National Natural Science Foundation of China（No. 51005122）;
Aviation Science Foundation of China（No. 2008ZE52049）

Determination of Collision-free Tool Orientation for RTCP

Zhang Yongnian;Zhao Dongbiao;Lu Yonghua;Liu Kai

Nanjing University of Aeronautics and Astronautics, Nanjing, 210016

Online:2012-05-10 Published:2012-05-15
Supported by:

National Natural Science Foundation of China（No. 51005122）;
Aviation Science Foundation of China（No. 2008ZE52049）

摘要/Abstract

摘要：

针对五轴数控加工中主轴头中心角速度超限和非线性误差的问题,提出了基于旋转轴线性插补的RTCP算法,分析了插补过程中的全局干涉现象,推导了刀杆偏差系数公式,得到了RTCP模式下的无碰干涉区域,避免了干涉现象的发生。算法减小了非线性误差,保证了插补过程中机床旋转轴的运动平稳性,当刀具长度变化时无需重新通过后置处理生成数控程序,提高了加工效率。仿真结果证实了算法的可行性。

关键词: RTCP, 五轴数控系统, 全局干涉, 非线性误差

Abstract:

Aiming at reducing the nonlinear errors and preventing angular velocity overrun, a RTCPalgorithm based on angle interpolation was proposed herein. The problems of global interference uring interpolation were analyzed, and then an interpolation error factor formula was derived. Finally, a collision-free region of RTCP algorithm was obtained. The algorithm can reduce thenonlinear errors effectively, ensure the rotation axes movement smoothly, improve the machining efficiency by ensuring that CNC codes need not to be generated by postprocessing software when tool length changes. Simulation results demonstrate the effectiveness of proposed algorithm.

Key words: rotation tool center point(RTCP), 5-axis CNC system, global interference, non-linear error

中图分类号:

TP237

章永年, 赵东标, 陆永华, 刘凯. RTCP算法中无碰刀轴矢量的确定[J]. 中国机械工程, 2012, 23(9): 1009-1013.

ZHANG Yong-Nian, DIAO Dong-Biao, LIU Yong-Hua, LIU Kai. Determination of Collision-free Tool Orientation for RTCP[J]. China Mechanical Engineering, 2012, 23(9): 1009-1013.

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