典型凸模零件数控加工工艺研究与设计

Research and Design of NC Machining Technology for Typical Punch Parts

在凸模零件工艺性分析的基础上,设计了基于工序集中和换刀次数最少的工艺方案,详细分析并确定了各工序的机床、刀具、夹具和切削用量,制定了加工工艺卡。按照建立工件坐标系、设计走刀路线、确定基点坐标及编写程序清单的编程路径进行了凸模零件数控程序的编制,并采用等间距直线段拟合抛物线的方法,设计了该抛物线的节点坐标算法,编制了宏程序,解决了该零件的加工编程难点。结果表明,该零件工艺方案正确、合理,程序运行平稳,保证了加工精度,缩短了加工时间,对凸模类零件数控加工工艺的设计具有参考价值。

Based on the technical analysis of punch parts, the process plan based on the process concentration and the minim μm n μmber of tool changes is designed. The machine tools, tools, fixtures and cutting amount of each process are analyzed and determined. A processing card is developed. According to the method of establishing the workpiece coordinate system, designing the tool path, determining the coordinates of the base point and progra mming the program list, the NC program of the punch part is compiled, and the parabola is fitted by the equidistant straight line segment. The node coordinates of the parabola are designed. The algorithm has compiled a macro program to solve the processing difficulties of the part. The results show that the process plan of the part is correct and reasonable, the program runs smoothly, the machining accuracy is guaranteed, the machining time is shortened, and the design of the n μmerical control machining process of the punch type parts has reference value.