多弯曲多形孔复杂边界钣金件级进模的开发

Development of progressive die for complex boundary sheet metal parts with multi bend and multi hole features

为避免冲压过程中由多弯曲多形孔结构引起的零件外部边界与内部形孔误差而导致的级进模开发失败,应用全工序方法开发出一套特征件级进模.首先设计了一个带有多弯曲多形孔特征的复杂边界钣金件的12工序毛坯排样方案,并对坯料的全工序冲压成形进行了有限元仿真分析.其次以全工序有限元仿真为基础,结合毛坯排样方案设计了一套12工位级进模.最后对试制的模具进行实冲试验,结果显示:产品表面光滑,无起皱与破裂等其他成形性问题,且产品的孔位精度和弯曲后的制件边界误差均满足设计要求;因此,本文设计的毛坯排样方案及其级进模能够很好地解决多弯曲多形孔复杂边界钣金件的冲压成形问题.

In order to avoid the failure of progressive die development due to the errors of the outer boundary and inner hole caused by the multi bend and multi hole structure in the stamping process,a set of feature progressive die was developed by using the whole process method.Firstly,a 12 process blank layout scheme of complex boundary sheet metal parts with multi bend and multi hole was designed,and the finite element simulation analysis of the whole process of blank stamping was carried out.Secondly,a set of 12 position progressive die was designed based on the finite element simulation of the whole process combined with the blank layout scheme.At last,through the trial production and real punching test of the die,it is concluded that the surface of the stamping product is smooth and without wrinkle,crack and other formability problem,the hole position accuracy of the product and the boundary error of the bent part can meet the design requirements.The blank layout scheme and progressive die designed in this paper can well solve the stamping problem of the sheet metal parts with complex boundary of multi bend and multi hole.