通过凸轮零件的数控铣削加工 ,阐述了铣床数控改造设计的原理和方法 ,以及在加工编程设计中参数数据的转换。应用斜线指令 ,将两直线运动的联动 ,变为直线运动与旋转运动的联动 ,实现非圆曲线凸轮的数控加工 ,并解析了提高凸轮型面轨迹运行精度的理论依据。 Through the CNC milling of cam parts, the principle and method of numerical control transformation design of milling machine and the conversion of parameter data in machining programming are expounded. By using the slanted command, the linkage of two linear motions is changed into the linkage of linear motion and rotational motion to realize the NC machining of the noncircular cam, and the theoretical basis for improving the running accuracy of the cam profile trajectory is analyzed.