水轮机上用的三通接头系非对称性零件(见图1),由于批量小(300件),而设计了一副胎模(见图2),用两台250kg空气锤生产,锻件全部合格。一、模具结构模具由模体1和压块2组成。与一般胎模的不同之处在于自由空间取在模体内A处(见图2)。当压块压下时,坯料凸肩金属便流向A处空腔,形成枝芽。二、锻造工艺1.三通接头难成型的是φ30mm的水平枝芽。把三通枝芽处改为自由端面,便于坯料成型(见图1b)及模具制造。 The three-way joint used on the turbine is an asymmetrical part (see Fig. 1). Due to the small batch size (300 pieces), a pair of molds are designed (see Fig. 2) . First, the mold structure Mold 1 and 2 from the mold block. And the general difference between the mold is taken in free space within the body A (see Figure 2). When the compact is pressed down, the billet shoulder metal flows to the cavity at A to form a branch bud. Second, the forging process 1. Three links difficult to shape the horizontal bud is φ30mm. The three branches of the branch office to the free end, easy billet molding (see Figure 1b) and mold manufacturing.