我厂在生产硬质合金小钻头、小铰刀等刃具时,工件的直径往往小于φ1.5mm,而且两端采取凸小顶尖的形式。生产时必须要用喇叭口小于φ0.75mm 的小型凹孔莫氏顶尖顶着磨削。加工这种莫氏顶尖是很困难的,主要是因为这种顶尖的孔口很小,最大不超过φ0.75mm。如果顶住这孔口,磨制莫氏圆锥 B 面时,吃刀量稍大一点,莫氏顶尖就要弹出来,易出工伤事故。我们通过反复实践,改进了小孔端的加工方法,先用两个顶尖(车头顶一只,尾座端一只)顶住这小顶 I plant in the production of hard alloy small drill, small reamer and other cutting tools, the workpiece diameter is often less than φ1.5mm, and both ends take the form of convex small tip. Production must use the bell mouth is less than φ0.75mm small concave hole Mohs top grinding with the top. It is very difficult to process this Mohs’ top, mainly because the top orifice is very small, the maximum does not exceed φ0.75mm. If you stand against this hole, grinding Morse cone B surface, eat a little larger knife, Mok’s top pop-up, easy to work injury. Through repeated practice, we improved the processing method of the hole end, first with two top (the top of the car, the tail seat one) to withstand this small top