多边形内孔加工的方法很多,但总起来说,原理不外乎是两种:(1)仿形法——利用与工件形状相同的刀具加工多边形内孔,例如用多边形冲头冲工件内孔。(2)范成法——通过一定方法,使刀具切削刀口的走刀运动,按多边形内孔的周边进行。因为操纵刀具走刀运动的方法不同,范成法又可分为人工范成法及机械范成法两种。前者是通过操纵者的手来控制刀具的走刀运动,例如用手操纵尖刀插刀按划线进行插削多边形孔。后者 There are many ways to machine polygons in the hole, but in summary, the principle is nothing more than two: (1) profiling - the use of the same shape with the workpiece polygon machining holes, such as polygon punch hole punch . (2) Fan Chengfa - through a certain method, so that cutting tool cutting edge of the knife movement, according to the perimeter of the polygon hole. Because of the different ways of manipulating the cutting tool movement, Fan Chengfa can be divided into two kinds: artificial method and mechanical method. The former is through the manipulator’s hand to control the tool’s cutting movement, such as hand-operated cutter knife insert scribing polygon hole. the latter