延迟顶出机构在控制薄壁压铸件变形中的应用

Application of Delayed Ejection Structure in Controlling Deformation of Thin Wall Die Casting Parts

介绍了一种控制薄壁压铸件收缩变形的顶出结构,通过使压铸毛坯在出模时产生反变形补偿铸件出模冷却过程中的收缩变形。此结构的原理是在压铸件顶出过程中根据压铸件的收缩变形趋势使压铸件不同区域分级脱模,使前、后分级脱模的不同压铸件区域形成一个设计变形量,从而达到补偿铸件出模后收缩变形的目的。此结构可通过精准控制延迟顶出结构的顶出延迟量控制压铸件变形,实现补偿压铸件出模后收缩变形的目的。

This paper introduces a kind of ejection structure to control the shrinkage deformation of thin-walled die casting,which compensates the shrinkage deformation of the casting during the cooling process by making the raw casting produce reverse deformation during the die casting.The principle of this structure is that in the process of product ejection,according to the shrinkage deformation trend of the product,different areas of the product are demoulded by stages,so that different areas of the product before and after demoulding by stages form a design deformation,so as to achieve the purpose of compensating the shrinkage deformation of the casting after ejection.This structure can precisely control the deformation of the product by controlling the ejection delay of the delayed ejection structure,so as to realize the purpose of compensating the shrinkage deformation of the product after mold ejection.