锻压技术

某汽车后地板横梁冲压成形数值模拟及参数优化

英文标题：Numerical simulation and parameters optimization on stamping for rear floor beam of an automobile

作者：莫明立

单位：重庆工商职业学院

分类号：TG386

出版年,卷(期):页码：2019,44(6):41-45

摘要：

以某汽车后地板横梁为研究对象，对其结构特征进行了分析，设计了拉延成形切边冲孔翻边整形的工艺方案，并利用Autoform软件建立了有限元分析模型。针对零件在拉延和翻边整形过程中出现的起皱和拉延不充分现象，对拉延模具型面进行了优化设计;并采用了一种基于响应面法的优化方法：以分段式拉延筋的阻力系数和压边圈的压边力为优化因素，将最大减薄率和最大增厚率作为目标函数，利用响应面法,构建优化因素与目标函数的拟合方程;求解得到最优的参数组合：t1为40%、t2为30%、t3为40%、Fb为900 kN;最终经过验证，预测结果与模拟验证结果具有较好的吻合度，并且通过试生产，得到了合格零件，验证了该方法的正确性。

For a rear floor beam of an automobile, its structure characteristics were analyzed, and the stamping process was designed as drawingtriming and punchingshaping and flanging. Then, the finite element analysis model was established by software Autoform. Aiming at the wrinkling and inadequate drawing phenomenon in the process of drawing,shaping and flanging for parts, the profile of drawing die was optimized for design, and an optimization method based on the response surface method was presented, that is, taking the resistance coefficient of segmented drawbead and the blank holder force as the optimization factors, and taking the maximum thinning rate and the maximum thickening rate as the objective functions. Furthermore, the fitting equation between the optimization factors and the objective functions was constructed by the response surface method, and the best parameters combination with 40% for t1，30% for t2，40% for t3 and 900 kN for Fb was obtained by solving the equation. Finally,the experiments show that the simulation results have a better consistency with the predicted results. And the qualified parts were obtained through trial production, which verified the correctness of the method.

基金项目：

重庆市教委科学技术研究项目(KJ1737460)

莫明立（1973-），男，硕士，教授 E-mail：227837817@qq.com

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