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冷冲压工艺在铁道车辆制造中已得到广泛的应用。以YZ_(22)型客车为例,冲压件约占零件总数的30％。随着高速轻型客车和空调车组出现,以钢代木,以板料冲压成形代替轧制型钢和铸、锻零部件的日益增多,冷冲压工艺将成为铁道车辆制造工艺中的非常重要的组成部分。在通常情况下,冷冲模设计所依据的参数大都是通过“相似试验”的方法取得的,多数是可靠的,可以直接用于生产实践。但是从变形条件而言,“相似试验”方法只限于针对一些简单的典型工序,与实际生产中的冲压条件有出入。如:物理相似、在材
Cold stamping process in the manufacture of railway vehicles has been widely used. Take YZ_ (22) passenger car for example, the stamping parts account for about 30% of the total number of parts. With the emergence of high-speed light buses and air-conditioned train sets, the substitution of rolled steel and cast steel by sheet-metal forming instead of rolled steel and castings, the increasing number of forged parts, the cold-stamping process will become a very important component in the manufacturing process of railway vehicles section. Under normal circumstances, most of the parameters on which the die design is based are obtained by the “similar test” method, most of which are reliable and can be directly used in production practice. However, from the deformation conditions, the “similar test” method is limited to some simple and typical processes, and the actual production of stamping conditions are different. Such as: physical similarity in the timber