摘要
针对S试件在五轴加工中产生的奇异点问题,对奇异点的产生原因进行了分析。为减小奇异点处非线性误差过大的影响,在后置处理阶段提出一种优化算法,通过线性插值增加刀位点数量,控制C轴程序段中的最大变化值,进而减小非线性误差。通过仿真及实际加工,验证了这一优化算法的正确性。
Aiming at the singularity problems of the singular point in five-axis machining of S type specimens,the causes of the singular point were analyzed. In order to reduce the influence of excessive non=linear error at singular points, an optimization algorithm was proposed in the post-processing stage. By increasing the number of the cutter location points through linear interpolation, the maximum variation value in the C-axis program segment was controlled, and then the non-linear errors were reduced. The correctness of the optimization algorithm was verified by simulation and actual processing.
引文
[1]彭雨,牟文平.基于NX的S试件数控编程优化策略[J].CAD/CAM与制造业信息化,2013(9):81-83.
[2]罗和平,王彪,汲军.航空发动机典型零部件数控加工技术研究[J].机械制造,2017,55(4):46-49.
[3] 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.
[4]杜娟,闫献国,田锡天.复杂曲面五轴加工局部干涉处理技术研究[J].图学学报,2012,33(1):113-121.
[5] SHE C H, HUANG Z T. Postprocessor Development of a Five-axis Machine Tool with Nutating Head and Table Configuration[J]. The International Journal of Advanced Manufacturing Technology,2008,38(7-8):728-740.
[6]于孝水,樊留群,齐党进,等.冗余轴解决五轴加工奇异问题的研究[J].机电一体化,2012,18(5):37-41.
[7]李显双,樊留群,齐党进.五轴加工奇异问题及其处理方法[J].组合机床与自动化加工技术,2013(6):37-39,43.
[8]罗和平,王彪,汲军.加工仿真技术在数控加工中的应用[J].机械制造,2017,55(5):45-51.
[9]杨国祥.基于VERICUT的多轴参数编程加工仿真[J].机械制造,2014,52(2):53-55.
[10]吴宝利,黄敦新.五轴联动数控加工中旋转角度的选取与优化[J].机械制造,2013,51(9):47-50.