七、封头模具结构设计因封头的冲压分冷冲和热冲两种,所以其模具尺寸和结构就不相同,冷冲时要考虑工件的回弹,而热冲要考虑工件的收缩,所以冷冲模具的工作部分的尺寸就要小于热冲模具相应部位的尺寸。在设计模具时,最好使 Seven, the first head die structure design due to head stamping sub-cold shock and hot red two, so the size and structure of the mold is not the same, when the cold punch to consider the rebound of the workpiece, and hot punch to consider the contraction of the workpiece, Therefore, the size of the working part of the punch die is less than the size of the corresponding parts of the hot stamping die. In the design of the mold, it is best to make