一 前言 低熔点合金模具,近年来在我国有了很快的发展。因其具有容易制造,成本低、效率高、上马快的许多优点,因而已在汽车、飞机、拖拉机等制造行业上,得到较普遍的应用,广泛用来制作生产批量较少的薄板成型模具。 这种模具,虽然已成功地用来制作拖拉机、汽车拉深、成型等模具,解决了模具制造上的一个大问题,然而,拉深成型以后的切边、冲孔等工序还要用钢模或手 A preface Low-melting alloy die, in recent years in our country has been the rapid development. Because of its advantages of easy manufacture, low cost, high efficiency and quick loading, it has been widely used in automobile, aircraft, tractor and other manufacturing industries and is widely used to manufacture thin plate forming molds with fewer production lots. Although this mold has been successfully used to make tractors, car deep drawing, forming and other molds, to solve the mold manufacturing a big problem, however, after the deep drawing forming trimming, punching and other processes but also with steel mold Or hand