铝合金前横梁充液成形工艺研究

Research on Hydroforming of a Front Beam with Rectangular Section

矩形截面前横梁作为典型前横梁形式,广泛用于汽车底盘悬架系统中。矩形截面管材成形过程中,两直角边之间的圆角是成形难点,极易造成该区域的壁厚减薄甚至破裂。本文通过理论分析确定等效应力最大的位置,之后通过数值模拟以及实验分析不同工艺参数对成形效果的影响。研究结果表明,补料量与成形内压配比对圆角区域壁厚有重要影响,补料量确定时,适当降低补料支撑内压有利于改善该区域的壁厚减薄。

Front beam with rectangular section is widely used in automobile chassis suspension systems.In the forming process of a pipe with rectangular section,the round corner between two straight sides is a difficult forming point,which is easy to cause the wall thinning or even crack.This paper analyzed the position where maximum equivalent stress position occurs through theoretical analysis,and then researched the influence of different process parameters on the forming results through numerical simulation and experiments.The results show that the ratio of feeding and internal pressure has an important influence on the wall thickness distribution of the rounded corner area.When the amount of feeding is determined,appropriately reducing the internal pressure during feeding is conducive to reducing the wall thinning of the area.