支架冲压工艺及模具设计研究

Study of stamping process and mold design of stand

支架零件结构形状极其复杂、尺寸精度要求高,筋、翻边分布在不同的面上,带料长、刚性不足使送料不畅、定位不准等给支架的生产带来了较大的困难。通过提高模具精度、定位精度及采用正确的排样即冲压工艺、校形等措施使零件达到精度要求;通过逐步成形实现零件的复杂形状;通过正确设计压筋、翻边前的工序件形状来实现在不同的面上压筋、翻边;通过使载体成L形以及重新设计浮料零件来解决带料长、刚性不足的问题。同时模具采用全三维设计,方便后续数控加工程序的生成。并且针对常用卸料螺钉拧紧、拧松操作麻烦的不足进行了重新设计使其操作简单。

The structure and shape of bracket parts are extremely complex and demands, and the production is difficult for the tendons and flanging distributing in different surfaces, poor feeding caused by long strip and lacking of rigidity, positioning imprecision etc. By the measures of improving mold precision and position accuracy, and adopting correctly nesting such as stamping process and sizing etc. , the accuracy requirements of parts were achieved. The complex shape of part was achieved through the progressive forming ; beading and fIan- ging on different surfaces was achieved through properly design of process piece shape before beading and flanging. The problems of long strip and lacking of rigidity were solved through making the strip into L - shaped and redesigned floating material parts. Meanwhile, a fully three - dimensional mold design was adopted, which is easy to generate subsequent CNC machining process. And then, for the common discharge of troublesome operation when tightening and loosening the screw, redesign was conducted to make it easy to be operated.