针对零件上各种孔的特殊位置关系,通过数控系统中的极坐标指令,并与孔加工固定循环指令组合使用完成零件上全部孔的加工,这样使程序变得简单易读,极大提高了编程效率。以美国HAAS自动化公司生产的VF-1型立式加工中心为例,重点介绍了G70、G71、G72指令的相关格式、使用方法及注意事项,结合实例详细分析了极坐标指令在实际编程中的具体应用,并且借助机床图形显示功能验证刀具路径的可行性。 Aiming at the special position relation of all kinds of holes on the part, the complete hole processing on the part is completed through the polar coordinate instruction in the numerical control system and combined with the hole machining canned cycle instruction, which makes the program easy to read and greatly improved Programming efficiency. Taking the VF-1 vertical machining center produced by HAAS Automation Co., Ltd. as an example, this paper introduces the relevant format, usage and precautions of the G70, G71 and G72 commands, and gives a detailed analysis of the actual programming of polar coordinates Specific applications, and with the help of machine tool graphic display tool to verify the feasibility of the path.