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.
作者
裴永生
李亮亮
李志明
刘选太
赵彩艳
Pei Yongsheng;Li Liangliang;Li Zhiming;Liu Xuantai;Zhao Caiyan(School of Vehicle and Energy,Yanshan University,Qinhuangdao 071000,China;Hebei Key Laboratory of Special Carrier Equipment,Yanshan University,Qinhuangdao 071000,China;Technology Center,Hebei Xinglin Automobile Body Making Co.,Ltd.,Cangzhou 061000,China)
出处
《锻压技术》
北大核心
2025年第2期40-45,共6页
Forging & Stamping Technology
关键词
发动机罩外板
网孔覆膜
冲压工艺
回弹补偿
头部保护
engine hood outer plate
mesh coating
stamping process
springback compensation
head protection
