我厂有种多头螺纹工件,其导程为36毫米,头数为12头。若采用小刀架移动法加工,分头误差是难以保证的,而采用样板刀,其精度和光洁度也难以满套平移了一个螺距(3毫米),然后将定位钩插入原导槽内即可加工第二头,依此类推,直至加工完毕。加工小孔多头内螺纹时,在分头套内装内孔刀,即 I plant a long multi-threaded workpiece, the lead is 36 mm, the first number of 12. If using a small knife holder movement method, the split error is difficult to guarantee, and the use of model knife, the accuracy and finish is also difficult to set a full shift of the pitch (3 mm), and then insert the positioning hook can be processed within the original guide groove Two, and so on, until the processing is completed. When processing small hole long internal thread, the internal hole knife is installed in the separate head, that is