基于正交试验的侧围外板拉延成形工艺参数优化研究……………………………………蒋磊 王龙 李十全 王大鹏 田钟炎 石峻嵘

Research on Optimization of Drawing Process Parameters for Side Outer Panel Based on Orthogonal Test

panel. object, Abstract：cracking, To and address studies these the process problems, wrinkling parameters this and paper insufficient affecting takes the the plastic drawing side deformation outer quality panel of easily the of a side occur certain outer in vehicle panel. the drawing model Using of the as the the single side research factor outer variable method, the paper studies the influence of 5 variable factors of blank holder force, stamping velocity, friction coefficient, die surface clearance and drawbead resistance coefficient on the drawing quality of the side outer panel. The orthogonal test method and the range analysis method are used to optimize the target to reduce the maximum thinning rate, and to screen out the best combination of process parameters. The optimization method of the influence of various variables on the maximum thinning rate of the side outer panel is clarified, the variance of the test results is also analyzed, and the significant factors affecting the thinning rate are both obtained. The optimized process parameters are used for drawing simulation, and a good drawing effect is obtained. The results of drawing simulation is used to guide the die tryout, a part with no cracks, wrinkles, and sufficient plastic deformation is obtained. The maximum thinning rate is 19.8% and the maximum thickening rate is 3.6% . Research shows that applying orthogonal experiment to forming simulation can improve the drawing quality of the side wall outer panel and increase the success rate of die tryout. Key words: Side outer panel, Stamping process, Stamping simulation, Orthogonal test, Range analysis, Variance analysis, Thinning rate