【摘要】 汽车尾灯支架是汽车外覆盖件。对单个零件进行成形时,需要增加很多工艺补充材料,冲压方向不容易确定,而且会产生侧向力。利用对称性采用一模两件工艺,既降低了成形难度,提高材料的利用率,又有利于拉深成形过程中的金属流动。利用数值模拟技术,仿真了成形过程;根据应力应变的分布,对成形中的起皱和拉裂,以及板料变形程度进行了预测;优化了毛坯形状、工艺补充面、拉延筋的分布和阻力。优化后的工艺参数得到了良好的成形质量,模拟结果与实验吻合。更多还原

【Abstract】 As an automobile outer panel, taillight supporter holds several features such as three-dimensional surface, asymmetry shape, large distortion, large figuration depth, large variety of surface structure, the complexity of the flow of the material and high quality of surface. As for the figuration of a single part, it is difficult to ensure the direction of the press, further more, it needs to increase the supplement material of the craftwork and brings the side force. Considering its symmetry, two mould process was adopted, which reduced forming difficulty, improved the utilization rate of the material and also favored to the flow of the metal in the process of the deep drawing. Numerical simulation technique has been used to simulate the forming process. Based on the distribution of the stress and the strain, it forecasted wrinkle, cracking and shaping degree in the sheet forming process. Furthermore, it optimized the blank’s figure, the supplement surface of the craftwork and the distribution and the resistance of the draw bead. The technical parameters produced good forming quality after optimizing. The simulation result coincided with the physical test. This research could offer references for the similar design.更多还原