目前,在我国机械制造企业特别是汽车拖拉机制造企业中,锤上模锻仍然是普遍采用的一种工艺。但是,或许是由于习惯势力,一般工艺都比较守旧,因而或多或少影响了它的经济效益。我们认为锤上模锻工艺的某些方面应当寻求一些改进,下面是我们在生产中的几点做法: 一、尽可能不用预锻模膛预锻是锤上模锻生产时广泛采用的一个工步,用于锻造工字型断面、高筋、叉型和其它形状复杂而难以充满的锻件;也采用于弯曲轴类锻件。然而,预锻模膛的选用是模锻工艺设计中的一个重要问题。长期以来, At present, China’s machinery manufacturing enterprises, especially automobile tractor manufacturing enterprises, the hammer is still a commonly used forging process. However, perhaps due to habitual forces, the general process is more conservative, and thus more or less affected its economic benefits. We believe that some aspects of the hammer forging process should seek some improvements, here are some of our practices in production: First, as far as possible without pre-die pre-die forging hammer is widely used in the production of a Step for forging I-shaped cross-section, high tendons, forks and other complex and difficult to fill the shape of the forgings; also used for bending axis forgings. However, the use of a pre-die bore is an important issue in die-forging process design. For a long time,