我厂在加工不锈钢工件的内孔(φ13H 8,表面粗糙度Ra0.8)时,过去采用磨削加工。由于购不到单晶刚玉内孔砂轮,只能采用白刚玉砂轮代替,磨削表面粗糙度只达到Ra1.6,用砂布抛光可以达到Ra0.8,但生产效率低,又容易抛出喇叭口使工件报废,影响生产进度。为此,我们研制了挤光刀,用冷挤来加工内孔。挤光刀的几何参数。 I plant in the processing of stainless steel workpiece bore (φ13H 8, surface roughness Ra0.8), the past, the use of grinding. As can not buy single crystal corundum bore wheel, can only use white corundum wheel instead, the grinding surface roughness reaches only Ra1.6, polishing with abrasive cloth can reach Ra0.8, but the production efficiency is low, but also easy to throw the bell mouth The workpiece scrapped, affecting the production schedule. To this end, we developed a squeeze knife, cold extrusion to process the inner hole. Extruded knife geometric parameters.