Numerical Simulation of Rubber Bladder Hydroforming Process for Shrink Flanging Parts with Large Curvature

摘要

The main defect of shrink flanging wing rib is wrinkling in rubber bladder hydroforming.In the aeronautical field,the side blank holder is usually used to avoid wrinkling.In order to obtain appropriate parameters of side blank holder,it be carried out that the simulation analysis for the process of the high hydraulic press rubber forming processes of high shrink flanging with side blank holder by the ABAQUS finite element software.Besides,the corresponding experiments verified also be implemented.The research results show that the sheet metal tends to wrinkle along with decrease of the blank lap width and increase of these parameters such as the distance between side blank holder and die,the dip angle and fillet radius of the side blank holder.