Automobile Technology & Material
钢铝异种材料自冲铆接模拟及工艺研究
宋庆军 张林阳 李军 郑虹
⋯⋯⋯宋庆军 张林阳 李军 郑虹Simulation and Process Study of Self-piercing Riveting of Steel/aluminum Dissimilar Materials⋯song Qingjun, Zhang Linyang, Li Jun, Zheng Hong
(中国第一汽车股份有限公司材料与轻量化研究院,长春130011)
摘要:以某乘用车钢铝混合发动机罩为研究对象,建立钢铝板材试样自冲铆接模型,模拟其铆接过程,研究不同铆模深度、铆钉长度及板材搭接顺序对铆接接头几何形状和力学性能的影响,并对优化后的铆接组
1.8 mm DP590合进行自冲铆接工艺试验,从而优选出最佳的钢铝铆接参数。结果表明,针对厚度 的 高强钢
1.2 mm 6016-T6 5mm 5.3 mm、铆模直径9mm和厚度 的 铝合金自冲铆接,采用铆钉长度 、钉腿直径 、铆模深度
1.5 mm、“钢上铝下”的铆接方式所获得的铆接接头几何形状和力学性能俱佳,且无裂纹、穿透、铆钉屈服等铆接缺陷,可用于实际钢铝混合发动机罩的自冲铆接中。
关键词:钢铝混合 自冲铆接 数值模拟 工艺分析
中图分类号:U465.2;U466 文献标识码:B 10.19710/J.cnki.1003-8817.20210076
DOI:
Simulation and Process Study of Self-piercing Riveting of Steel/ Aluminum Dissimilar Materials
Song Qingjun, Zhang Linyang, Li Jun, Zheng Hong
(Research Institute of Materials and Lightweight, China FAW Co., Ltd., Changchun 130011)
Abstract:with the steel/aluminum hybrid engine hood of a passenger car as the research object, the selfpiercing riveting model of steel/aluminum sheet specimen is established and the riveting process is simulated, the effects of different depth of rivet die, length of rivet and lap sequence of sheets on the geometrical shape and mechanical properties of riveting joint are studied, then the self- piercing riveting process test is carried out for the optimized riveting assembly, thus the best steel/aluminum riveting parameters are chosen. The results show that for self-piercing riveting of DP590 high strength steel with a thickness of 1.8 mm and 6016-T6 aluminum alloy with a thickness of 1.2 mm, the best geometrical shape and mechanical properties of riveting joints are obtained by adopting the rivet length of 5 mm, the rivet diameter of 5.3 mm, the rivet die diameter of 9 mm, the rivet die depth of 1.5 mm and the“steel up aluminum down”riveting mode, and there are not riveting defects such as crack, penetration and rivet yield, thus the riveting parameter can be used in self-piercing riveting of the actual steel/aluminum hybrid engine hood. Key words: Steel/aluminum hybrid, Self-piercing riveting, Numerical simulation, Process analysis
1 前言
轻量化作为汽车行业普遍关注的话题,可有效降低油耗、节约能源、减少尾气排放,提高驾驶操控性[1] ,材料替代可显著提升汽车轻量化水平,采用高强钢和铝合金等材料代替传统钢制材料已
成为汽车车身用材的主要方向。传统车身由于多为同种钢制材料连接,采用点焊及弧焊的方式即可满足车身各零件的组装,然而对于目前广泛研究的钢铝混合材料车身,由于钢、铝物理性能的差异及钢铝焊接易产生脆性金属间化合物的缺点,
传统点焊及弧焊连接方式已不再适用[2] ,新型的机
作者简介:宋庆军(1989—),男,工程师,硕士学位,研究方向为汽车用金属材料及连接技术。
参考文献引用格式:
宋庆军, 张林阳, 李军, 等.钢铝异种材料自冲铆接模拟及工艺研究[J].汽车工艺与材料, 2021(7):1-6.
SONG Q, ZHANG L, LI J, et al. Simulation and Process Study of Self- Piercing Riveting of Steel/aluminum Dissimilar Materials[j]. Automobile Technology & Material, 2021(7): 1-6.