锻压技术

基于AutoForm的汽车后门外板拉延分析与工艺参数优化

英文标题：Drawing analysis and process parameter optimization on automobile rear door outer panel based on AutoForm

作者：吴光辉

单位：娄底职业技术学院

分类号：TG386.1

出版年,卷(期):页码：2021,46(7):90-95

摘要：

以某无框汽车后门外板为研究对象，利用正交实验方案，以拉延变形时的最大增厚率和最大减薄率为研究指标，以拉延时的成形力、压边力、摩擦系数和模具间隙4个工艺参数为实验因子，在CAE软件AutoForm中按5个水平进行模拟仿真，考察各组实验结果的成形质量，并对结果进行极差分析，得出最优工艺参数组合。最后，根据最优组合的仿真结果，并结合现场经验，向主机厂反馈了产品改进意见。通过分析和改进，在标称压力为800 t的压力机上，采用压边力为1400 kN、模具间隙为0.77 mm、摩擦因数为0.15的工艺参数进行拉延加工，得到的车门外板无开裂和起皱缺陷，表面质量光整均匀，符合工艺要求，且明显缩短了设计周期和成本。

Taking the rear door outer panel of a frameless automobile as research object, using the orthogonal experiment scheme, taking the maximum thickening rate and the maximum thinning rate during drawing deformation as the research indicators and the four process parameters of forming force, blank holder force, friction coefficient and clearance between punch and die during drawing as the experimental factors, the simulation was carried out by CAE software AutoForm according to five levels, and the forming quality of each group of experimental results was investigated. Then, the results were analyzed by range, and the optimal combination of process parameters was obtained. Finally, based on the simulation results of the optimal combination and combined with on-site experience, the product improvement opinions were fed back to the Original Equipment Manufacturer (OEM). Through analysis and improvement, a drawing processing was conducted by a press with the nominal pressure of 800 t, the blank holder force of 1400 kN, the clearance between punch and die of 0.77 mm and the friction coefficient of 0.15 to obtain the rear door outer panel without cracks and wrinkles as well as the surface quality of smooth and uniform, which met the process requirements and significantly shortened the design cycle and cost.

基金项目：

作者简介：吴光辉（1979-），男，工程硕士，副教授，E-mail：16795495@qq.com

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