针对如何加工零件内孔为椭圆轮廓研究不足的问题，分析了其加工中存在的主要难点，提出了仿G71指令进行数控加工编程设计的解决方法，建立加工模型，编写加工程序，应用仿真软件进行仿真模拟并在机床上完成最终加工。仿真验证及加工试验结果表明，仿照G71指令编程完成内孔椭圆部分的粗车加工，再应用直线逼近进行椭圆曲线精加工是解决椭圆内孔零件的较好方法，同时该加工设计思路具有通用性，同样适用于除了椭圆外其余二次曲线的轨迹编程。%Considering the insufficiency of studying how to machine the parts with elliptical profile inner hole, the major difficulties of this machining method is analysed, the solution of using G71 instruction to de-velop and design the numerical control program is introduced through establishing the processing prototype, compiling the processing program and simulating the processing way by emulating software until complete the actual processing in lathe. The simulation and processing experiment results shows that the adoption of G71 instruction is a better solution for processing the parts with elliptical profile inner hole, through the first-ly rough processing the elliptical profile of the part by G71 instruction and then fine processing by line-ap-proaching method. In the meantime, this processing idea also has the wide application for processing the other non-elliptical profile parts.
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