在加工如图1所示的大型喇叭形零件时,其尺寸要求在自由公差之内,内表面不允许有明显的不平滑,所用材料又较厚,如用手工制造困难较多。另外,我们又没有大型的模具和设备,最终采用了一种简易模具制成了该零件,解决了难题。模具结构如图2所示。凹模和凸模各由两块弧 In the processing of large horns as shown in Figure 1 parts, its size requirements within the free tolerances, the inner surface is not allowed to have obvious non-smooth, thick material used, such as hand-made more difficult. In addition, we did not have a large mold and equipment, the final use of a simple mold made of the parts, to solve the problem. Mold structure shown in Figure 2. Die and punch each by two arcs