锻压技术

某发动机罩外板网孔覆膜结构冲压工艺分析

英文标题：Stamping process analysis on mesh coating structure for an engine hood outer plate

单位：1.燕山大学车辆与能源学院 2.燕山大学河北省特种运载装备重点实验室 3. 河北兴林车身制造集团有限公司技术中心

分类号：TG386.3

出版年,卷(期):页码：2025,50(2):40-45

摘要：

针对目前汽车发动机罩外板与行人碰撞时会对行人头部造成较大伤害的问题，分析了某发动机罩外板与行人头部碰撞概率较高的区域，对其进行了均布网孔设计，降低了其刚度，在一定程度上实现了对行人头部的保护。同时,考虑发动机罩外板外覆盖件密封的需求，利用橡胶薄膜对开孔部位进行粘贴，保证其实际使用需求。首先，利用金属板料拉伸性能试验确定网孔设计的初步方案;然后,对原实体板料的冲压模具的模面进行修改，使带孔板料冲压后产品满足设计要求;最后,使用Autoform软件进行回弹补偿与迭代优化，并利用Think-design软件对补偿后的工具体模面进行了曲面拟合，保证了带孔板料冲压后产品满足设计要求，以及最终产品可以满足其在检测工装上的精度要求。

For the problem that the severe head injuries to the pedestrians are caused by collisions between car engine hood outer plate and pedestrian, the area with high probability of collision between a certain engine hood outer plate and pedestrian head was analyzed，and a uniform distributed mesh design was implemented to reduce its stiffness and achieve the protection for the pedestrian head to a certain extent. At the same time, considering the sealing need for the outer cover of engine hood outer plates, a rubber film was applied to stick the opening parts to ensure their actual usage needs. Firstly, the preliminary scheme for mesh design was established by tensile performance test of sheet metal. Then, the die surface of stamping die for the original solid sheet metal was modified to ensure that the stamped products with perforated sheet metal could meet the design requirements. Finally, software Autoform was used for springback compensation and iterative optimization, and the die surface of compensated tool body was fitted by software Think-design to realize that the stamped products with perforated sheet metal could meet the design requirements and the final product could meet its accuracy requirements on the inspection fixture.

基金项目：

作者简介：裴永生（1973-），男，博士，副教授,E-mail：39568353@qq.com;通信作者：李志明（1981-），男，学士,E-mail：18534792564@163.com

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