真空高压铸造铝合金车身后纵梁轻量化设计

doi:10.19562/j.chinasae.qcgc.2020.03.015

摘要/Abstract

摘要： 为提高汽车发生后撞时车身的耐撞性和轻量化效果,采用真空高压铸造铝合金后纵梁替代某电动车型传统钢制钣金焊接总成。从后撞耐撞性出发,通过拓扑优化,考虑压铸成形和连接工艺等要求,设计了压铸铝合金后纵梁,实现了后纵梁结构的模块化和轻量化。结果表明,铝液填充平稳,没有明显的冷隔、缩孔等缺陷,产品性能满足后撞和各安装点刚度要求。

关键词: 真空高压铸造, 铝合金, 后纵梁, 轻量化

Abstract: To enhance the crashworthiness and lightweighting effects of car body in rear-end collision, vacuum-assisted high pressure (VAHP) die-casting aluminum alloy is adopted for rear longitudinal beam (RLB) to substitute its traditional steel counterpart. With the crashworthiness in rear-end collision as the focus of attention, by means of topology optimization, with consideration of the requirements of die casting forming and connection technology, die-casting aluminum alloy RLB is designed and the modularization and lightweighting of RLB structure are achieved. The results show that the filling of aluminum liquid is smooth without apparent defects such as cold insulation and shrinkage cavity, and the performances of RLB meet the requirements of rear-end collision and the stiffness in each installation point

Key words: VAHP die-casting, aluminum alloy, rear longitudinal beam, lightweighting

林佳武, 李玄霜, 陈宗明, 陈东, 李永祥, 耿富荣. 真空高压铸造铝合金车身后纵梁轻量化设计[J]. 汽车工程, 2020, 42(3): 383-389.

Lin Jiawu, Li Xuanshuang, Chen Zongming, Chen Dong, Li Yongxiang, Geng Furong. Lightweight Design of Body Rear Longitudinal Beam of VAHP Die-casting Aluminum Alloy[J]. Automotive Engineering, 2020, 42(3): 383-389.

参考文献

[1] HÖRHOLD R, MÜLLER M, MERKLEIN M. Mechanical properties of an innovative shear-clinching technology for ultra-high-strength steel and aluminium in lightweight car body structures[J]. Welding in the World,2016,60(3):613-620.
[2] 慕温周,杨人杰,朱珍厚,等.车身轻量化实现的思路及途径[J].汽车电器,2018(2):6-9.
[3] 王力,吴旭,魏然,等.某乘用车追尾碰撞分析及结构改进研究[J].轻型汽车技术,2012(Z3):8-11.
[4] 杨济匡,唐超群.轿车高速追尾碰撞中结构耐撞性优化设计[J].中国机械工程,2011,22(5):616-620.
[5] 孙喜龙,王登峰,卢放,等.基于提高轿车后面抗撞性能的后纵梁结构优化[J].吉林大学学报,2011,41(9):87-91.
[6] 徐鑫,林利,丁庶炜,等.TWB结构汽车后纵梁轻量化方案可行性研究[J].鞍钢技术,2018(4):15-17.
[7] 杨志强,麻桂艳.汽车后纵梁轻量化设计方法研究[J].汽车实用技术,2018(8):132-133.
[8] KIM B Y, JEONG C M, KIM S W, et al. A study to maximize the crash energy absorption efficiency within the limits of crash space[J]. Journal of Mechanical Science and Technology,2012,26(4):1073-1078.
[9] 戴起勋.金属材料学[M].北京:化学工业出版社,2012.
[10] 李四娣,安肇勇,黄明军,等.高真空压铸汽车底盘结构件的热处理[J].特种铸造及有色合金,2017,37(9):975-978.
[11] OU Heguo, TANG Xiaodong, XIAO Jieping, et al. Lightweight body-in-white design driven by optimization technology[J]. Automotive Innovation,2018,1(3):255-262.
[12] 徐岩,陈宇东,杨志军,等.载重汽车变速器壳体加强筋布置的优化设计[J].哈尔滨工业大学学报,2009,41(3):157-160.
[13] 岁波,都东,常保华,等.轻型车身自冲铆连接技术的发展[J].汽车工程,2006,28(1):85-89.
[14] 陈超,赵升吨,韩晓兰,等.现代汽车板材的有铆钉塑性连接及其核心技术探讨[J].锻压装备与制造技术,2016,51(2):74-76.
[15] 傅志方,华宏星.模态分析理论与应用[M].上海:上海交通大学出版社,2000:8-9.