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

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⋯⋯⋯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.

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