乡向模锻(又称多柱塞模锻)基本上是在六十年代发展和推广起来的一项新工艺。其工作原理是:在可以阴模闭合后(阴模闭合过程中毛坯可以产生变形,也可以不产生变形),几个冲头自不同方向同时或先后对毛坯进行挤压,从而在一次加热和压力机的一次行程中获得形状复杂的多分支锻件。这一工艺实质上是挤压和模锻的综台过程,并且以挤压为主。在毛坯变形过程中,既有部份金属平行于冲头运动方向产生流动,又有部份金属垂直于冲头运动方向(或者和冲头运动方向成一角度)产生流动。采用这一工艺能够避免产生飞边,节约毛坯材料,减少模锻工序,并能提高锻件精度和机械性能。 Rural forging (also known as multi-plunger forging) is basically a new technology developed and promoted in the sixties. Its working principle is that after the female mold can be closed (the female mold can be deformed or not during the closed process of the female mold), several punches squeeze the blank from different directions at the same time or one after another, Get a complicated multi-branch forging in one pass of the press. This process is essentially a comprehensive process of extrusion and forging, and the main extrusion. During the deformation of the blank, both the existing part of the metal flows parallel to the direction of movement of the punch, and some of the metal flows perpendicular to the direction of movement of the punch (or at an angle to the direction of punch movement). Using this process can avoid the occurrence of flash, save the blank material, reduce the die forging process, and can improve the accuracy and mechanical properties of forgings.