为了扩大自由锻锤的使用范围和解决现有的自由锻锤无法锻造的大型模锻件的问题,我厂经过多年生产实践搞出一种半固定模的锻造工艺,在三吨自由锻锤上可以锻造出内燃机车上的连杆、轴承盖、端头和叉头等大型锻件。这种锻模的结构:下模3通过二层座2固定在下座1上,上模5不固定,起模与合模靠锤头7的起落通过两根链条6错角吊 In order to expand the use of free forging hammer and solve the existing forging forgings can not forgive the existing problems of large forging, I plant after years of practice to come up with a semi-fixed mold forging process, the three-ton free forging hammer can Forging a diesel locomotive connecting rod, bearing caps, ends and fork and other large forgings. The structure of the forging die: the lower die 3 is fixed on the lower base 1 through the two-layer seat 2, the upper die 5 is not fixed, the die-lifting and the die-closing are supported by two chains 6,