齿轮、凸轮和皮带轮等机器零件的键槽,习惯上常用插床或铣床装上插头加工。由于大多数单位并不普遍具备插床,而铣床插头也较少,特别是使用这些设备插键槽存在下述两个问题:1.插头刚性差(特别是铣床插头),精度低(滑枕间隙大),对于尺寸大或长的键槽往往产生上面槽深、下面槽浅和插出键槽歪斜等缺陷。2.插刀头没有让刀运动,所以,在插刀回程时刀刃和工件之间产生摩擦,使刀刃磨损严重,工件光洁度低。 Gear, cams and pulleys and other machine parts of the keyway, customary used sockets or milling machines fitted plug processing. Because most units do not generally have a slot machine, and milling machine plugs are less, especially the use of these devices slotted slot has the following two problems: 1. Poor plug rigidity (especially milling machine plug), low accuracy (ram gap ), For large or long keyway often produce above the groove depth, the following shallow slot and the key slot out of skew and other defects. 2. The cutter head does not move the knife, so friction occurs between the cutter and the workpiece when the cutter returns to make the cutter wear seriously and the finish of the workpiece is low.