点云直接生成刀具路径及其后置处理

Study of generating tool path from discrete data point cloud and post processing

通过最小化每个刀位网格单元的加工误差以确定每个刀位网格的节点位置,加权平均相关联刀位网格节点来对齐相邻刀位网格单元的边缘,生成高效合理的数控加工刀具路径。对所获得的具路径信息进行后置处理,根据机床的结构不同,采用了相应的坐标转换,生成用于三轴加工和五轴加工的G代码。利用Vericut软件,对数据点云直接加工的刀具路径进行了动态仿真,最后应用实例验证了后置处理生成G代码的有效性。

The positions of the CL-net nodes can be determined by minimizing the machining error of each CL-net cell,and the edges of adjacent CL-net cells are aligned by weighted averages CL-net nodes that are associated with each other. The efficient tool paths are generated finally. The relevant coordinate transform relationship is adopted according to the different machine structures. Then a method of post processing of the tool paths is applied. The G codes used in three-axis arrive-axis machining are generated respectively. The correctness of above NC machining methods is proved by the machining simulation with simulation software. Finally,the effectiveness of the method is verified by given examples.