Automobile Technology & Material
LFT-D汽车后地板的设计与应用
刘鉴锋 薛军 徐希宇 李永祥 耿富荣
⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯刘鉴锋 薛军 徐希宇 李永祥 耿富荣Design and Application on LFT-D Automotive Rear Floor ⋯⋯⋯⋯Liu Jianfeng, Xue Jun, Xu Xiyu, Li Yongxiang, Geng Furong
511434) (广州汽车集团股份有限公司汽车工程研究院,广州
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LFT-D问题,选取 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
2足刚度、强度及堆垛仓储要求。同时集成阻尼垫及 个安装支架,实现功能整合。后地板与白车身的连接通
4 LFT-D过聚氨酯胶粘剂和 个螺栓安装点实现。分析结果表明,该 零件的刚度性能优于钣金件;同阶次下,模LFT-D 2.27 kg,在小批量生态略低于钣金件,但满足使用要求。试验结果表明,该 零件满足使用要求并减重
产下(1×105
辆以内)成本低于钣金件。
关键词:LFT-D 轻量化 功能整合中图分类号:U463.82;U465.6 文献标识码:B 10.19710/J.cnki.1003-8817.20200495 DOI:
Design and Application on LFT-D Automotive Rear Floor
Liu Jianfeng, Xue Jun, Xu Xiyu, Li Yongxiang, Geng Furong
(Automotive Engineering Institute of Guangzhou Automotive Group Co., Ltd., Guangzhou 511434)
Abstract: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. Key words: LFT-D, Lightweight, Functional integration
1 前言
在节能、环保的要求下,轻量化成为汽车工业的发展趋势。新材料应用、结构优化设计以及先
3进制造工艺是实现汽车轻量化的 个重要途径,其中又以新材料的应用最为有效。塑料及树脂基复合材料,具有密度小、比强度和比模量高、耐腐蚀等特点,而且设计自由度大、集成性好,可获得显著的轻量化效果,目前已在汽车半承载件、承载
件、覆盖件和功能件上得到应用。欧美发达国家已大量选用复合材料进行汽车零部件开发,而我国在该领域还有不小的差距。
复合材料件的成本高于钣金件,严重制约了其在汽车上的应用。随着经济和技术的发展,市场需求日益多元化、个性化,汽车制造业往多品种、小批量和定制化生产的方向发展。复合材料件的模具、工装和设备投资成本比钣金件的要低得多,特别适合搭载在小批量车型上,更能适应未
作者简介:刘鉴锋(1989—),男,工程师,硕士学位,研究方向为复合材料汽车轻量化设计与应用。
参考文献引用格式:
刘鉴锋,薛军,徐希宇,等. LFT-D汽车后地板的设计与应用[J].汽车工艺与材料,2021(7):12-18.
LIU J, XUE J, XU X, et al. Design and Application on LFT-D Automotive Rear Floor [J]. Automobile Technology & Material, 2021(7): 12-18.