在生产中有许多零件的内孔为四方、五方或六方等内多边形。在一般单件或小批生产中,加工此类孔时,均采用划线后在普通插床上赶刀插成。这种加工方法,加工精度低、表面光洁度差、劳动强度高,特别是工件批量大或加工小内方孔时,更无法满足生产需要。经过我们多次试验,利用展成法仿形原理,在普通插床上用靠模自动走刀加工内方孔,取得了较好的效果。 In the production of many parts of the inner hole for the Quartet, five or six and other polygons. In the general single or small batches of production, processing such holes, are crossed after the common slot on the knife inserted into. This processing method, low precision, poor surface finish, high labor intensity, especially when the workpiece is large or small inner hole processing, but can not meet the production needs. After many of our experiments, the use of development into law imitation principle, in the ordinary slot with a manual automatic processing of the inner hole, and achieved good results.