前 言 七十年代以来,国外广泛采用线切割机加工冷冲压模具。随着数控技术的发展,机床的加工精度日益提高,同时,机床结构也有了很大的发展。如由只能切割垂直刃口发展到能同时控制走丝装置,从而可加工出任何形状的斜刃口(即可加工出凹模刃口后角)。据日本“金属”杂志介绍:日本一些企业利用线切割机的上述特点,从凹模坯料上同时加工出凸模。已成功地应用该 Preface The seventies, foreign widely used wire cutting machine cold stamping die. With the development of numerical control technology, the machining accuracy of the machine tool is increasing day by day, meanwhile, the machine tool structure also has a great development. For example, the cutting edge can only be machined to cut the vertical edge of the cutting edge to simultaneously control the wire feeding device, so that the bevel edge of any shape can be machined (that is, the relief edge of the die edge can be machined). According to Japan’s “Metal” magazine introduced: Some Japanese companies use the above characteristics of wire cutting machine, from the die blanks at the same time processing the punch. This has been successfully applied