拉深模压边时坯料下塌的解决方法

大型薄板汽车零件拉深成形过程中,当坯料放置在压边圈上时薄板中间会下塌,模具闭合时会产生褶皱,导致成形的零件表面产生缺陷。以中地板零件为例,对坯料下塌问题的产生和解决措施进行介绍,并描述采用活动凸模消除坯料下塌的方法,利用机床顶杆实现活动凸模对坯料的有效承托,消除了成形零件压伤风险,保证了零件的成形质量。

Solution of blank collapse when pressing in drawing die

In the drawing process of large automobile parts made of thin plate,when the blank was placed on the blank holder,the middle of the blank would be collapsed,which led to surface defects of the parts.Taking the middle floor as an example,comprehensively introduced the causes and solutions of the problem.It focused on the scheme that eliminating the collapse of blank by using the movable punch,and realized the effective support for the blank by using the ejector pin of the machine tool.Thus,it avoided the risk of parts crushing and ensured the forming quality of parts well.