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为了解决高强板前纵梁成形过程中存在的回弹问题,采用Dynaform软件建立前纵梁的拉延成形工序有限元模型,并进行有限元模拟以预测回弹量。然后根据回弹预测,进行偏差分析以及模面补偿。根据其有限元模拟的回弹预测结果,在拉延成形工序,对顶平面、侧壁以及法兰等区域进行补偿,补偿后所得成形模具用于试制,得到的拉延件经过切边工序获得合格制件,最后采用白光扫描对制件进行检测。检测结果表明,各检测点的偏差合格率在95%以上,即汽车前纵梁零件的最终回弹量控制达到允许范围内。
In order to solve the springback problem existing in the forming process of the front panel of the high strength steel sheet, Dynaform software was used to establish the finite element model of the drawing process of the front sidebeam. The finite element model was used to predict the springback. Then based on the springback prediction, the deviation analysis and the surface compensation are performed. According to the springback prediction result of its finite element simulation, the forming process of the drawing is compensated for the top plane, the side wall and the flange, and the resulting forming tool after the compensation is used for the trial production. The drawn part is obtained through the trimming process Qualified parts, and finally the use of white light scanning the workpiece inspection. Test results show that the deviation of each test point pass rate of 95% or more, that is, the final front-wheel vehicle front bumper rebound volume control within the allowable range.