我厂生产150C输送机中部槽锻件连接耳(见图1),材料A3钢,每台400余件,外加配件批量较大。1吨模锻锤成型后,内外切边工作量大。我们用内外切边模在160吨冲床上切边,效率较高。模具结构(图2)及切边过程如下: 该件内孔尺寸较小,如果内外毛边分别切除,内冲头细长刚性差,易崩裂、折断,操作也不便。故采用内外复合切边模解决上述问题。内冲头用螺纹固定在外冲头上,这就减短了内冲 I plant 150C conveyor central groove forgings connecting ear (see Figure 1), A3 steel material, each more than 400 pieces, plus larger parts. 1 ton forging hammer molding, internal and external trimming workload. We use the inside and outside trimming die trimming 160 tons of punch, high efficiency. Die structure (Figure 2) and the trimming process is as follows: The hole size smaller, if the inner and outer burrs were removed, the inner punch poor rigidity, easy to crack, break, the operation is not convenient. Therefore, the use of internal and external composite trimming die to solve the above problems. The inner punch is screwed on the outer punch, which shortens the inner punch