在我厂生产的阀体锻件(图1),材料是Hpb59-1。锻件的形状比较复杂,锻件内孔底部是倾斜的,不能切削加工,必须直接锻造成形。此锻件常规采用带飞边槽的开式锻模锻造成形后再切去飞边。但由于此锻件批量大,从节约材料,提高工效方面来考虑,以采用不带飞边槽的闭式锻模为好。 Valve body forgings produced in our factory (Figure 1), the material is Hpb59-1. The shape of the forgings is rather complicated. The bottom of the hole in the forging is inclined and can not be cut and machined. The forging must be directly forged. The forgings are usually forged with an open forging die with flash grooves and then cut off the flash. However, due to the large batch of forgings, from the aspect of saving materials and improving work efficiency, it is better to use the closed forging die without flashing trough.