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.
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 pro- posed 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.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2008年第9期1003-1006,1091,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
中国航空第一集团创新基金资助项目(CX03007)
关键词
加工
插补
误差检测
机床
machining
interpolation
error detection
machine tools
