我厂生产的射芯机中射砂筒,其狭缝宽0.4毫米,长40毫米,过去一直用铣削加工。由于刀体薄、强度弱,铣削量被迫限制得很小,加工一件需10小时以上,成了加工中的薄弱环节,最近以冲代铣获得成功,每件仅45分钟,且节省不少铣刀。冷冲法冲切在一般的冲床上完成的,冲模如图1所示。射砂筒的毛坯是2毫米厚的板料,当坯料在送料架2和压料板架4上用 The shotcrete core shooter tube produced by our factory has a slit width of 0.4mm and a length of 40mm, and has been used for milling in the past. Due to the thin body, weak strength, the amount of milling was forced to be very small, the processing of a need more than 10 hours, has become the processing of the weak links, the recent success of the red milling, each only 45 minutes, and save not Less milling cutter. Cold punching method in the general punch completed, die shown in Figure 1. The blank of the shooting barrel is 2 mm thick sheet material, when the blank in the feeding frame 2 and the pressure plate rack 4