Influence of pre-cutting hollowing on forming thinning rate of automobile rear cover
In view of the cracking,wrinkling and other defects in the stamping process for the outer plate of the rear cover of a certain car type,to control the plastic flow of local materials in the stamping process,pre-cutting hollowing structure was set up in advance on the stamping blank.The results of springback and thinning rate at the end of forming were obtained by finite element simulation analysis,and the causes of local defects were analyzed.After two rounds of iterative optimization for the pre-cutting hollowing structure,the results of CAE simulation after secondary optimization were compared with the results of optical scanning of the test module,and the consistent de-formation trend and similar forming limit curve were obtained.The pre-cutting hollowing scheme after secondary optimizations was applied to the actual forming die,and the stamping parts with good forming quality are obtained.Finally,the three-dimensional optical scanning equipment was used to scan the risk area and collect data of the stable production,and the validity of the finite element optimization scheme is verified.
rear cover outer panelplastic formingpre-cutting hollowingoptical measuring system
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NSTL
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