摘要
传统的乘用车后地板由钣金冲压件拼焊而成,质量大、模具工装成本高、耐腐蚀性差。为解决这一问题,选取LFT-D模压技术对某氢能源乘用车后地板进行轻量化设计。通过加强筋、平台等结构的布置,满足刚度、强度及堆垛仓储要求。同时集成阻尼垫及2个安装支架,实现功能整合。后地板与白车身的连接通过聚氨酯胶粘剂和4个螺栓安装点实现。分析结果表明,该LFT-D零件的刚度性能优于钣金件;同阶次下,模态略低于钣金件,但满足使用要求。试验结果表明,该LFT-D零件满足使用要求并减重2.27 kg,在小批量生产下(1×105辆以内)成本低于钣金件。
Traditional passenger car rear floor is made from stamping parts by tailor-welding,which brings problems such as heavy weight,high cost in tooling and low corrosion resistance.To solve this issue,LFT-D compression molding technology is used for lightweight design rear floor of a HFCV(Hydrogen Fuel Cell Vehicle).Stiffener and a platform layout are added to meet the requirements of stiffness,strength,stacking and storage.Meanwhile functional integration is achieved by integrating damping mat and 2 mounting brackets.The rear floor is bonded with BIW(Bady In White)by polyurethane adhesive and 4 bolts.Results of analysis show that compared with stamping parts,stiffness of LFT-D rear floor is better.Under the same order,its modal is slightly lower than stamping parts,but meets the use requirements.Experiment results indicate the LFT-D part meets service requirements with a weight reduction of 2.27 kg;moreover,its cost is also lower with a low-volume production within 100,000 units.
作者
刘鉴锋
薛军
徐希宇
李永祥
耿富荣
Liu Jianfeng;Xue Jun;Xu Xiyu;Li Yongxiang;Geng Furong(Automotive Engineering Institute of Guangzhou Automotive Group Co.,Ltd.,Guangzhou 511434)
出处
《汽车工艺与材料》
2021年第7期12-18,共7页
Automobile Technology & Material
