22MnB5高强钢/7075铝合金热铆接冷模具淬火无铆钉铆接研究

doi:10.3901/JME.2017.20.106

机械工程学报 ›› 2017, Vol. 53 ›› Issue (20): 106-112.doi: 10.3901/JME.2017.20.106

22MnB5高强钢/7075铝合金热铆接冷模具淬火无铆钉铆接研究

庄蔚敏, 赵文增, 解东旋, 李兵

吉林大学汽车仿真与控制国家重点实验室长春 130022

收稿日期:2016-12-05 修回日期:2017-02-05 出版日期:2017-10-20 发布日期:2017-10-20
通讯作者: 解东旋(通信作者),男,1989年出生,博士研究生.主要研究方向为车身结构设计与优化、有限元分析和金属成形技术.E-mail:xiedx_jlu@163.com
作者简介:庄蔚敏,女,1970年出生,博士,教授,博士研究生导师.主要研究方向为车身结构设计与优化、有限元分析和金属成形技术.E-mail:zhuangwm@jlu.edu.cn
基金资助:
国家自然科学基金（51375201，51075178）和吉林省自然科学基金（20170101130JC）资助项目。

Research on Hot Riveting Quenching Clinching of the High Strength Steel 22MnB5 and Aluminum Alloy 7075

ZHUANG Weimin, ZHAO Wenzeng, XIE Dongxuan, LI Bing

State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022

Received:2016-12-05 Revised:2017-02-05 Online:2017-10-20 Published:2017-10-20

摘要/Abstract

摘要： 针对目前车用22MnB5高强钢和7075铝合金板料在连接工艺上存在的问题，提出一种高强钢和铝合金异种材料车身零件的热铆接冷模具淬火（Hot riveting quenching， HRQ）无铆钉铆接工艺，利用22MnB5在高温下良好的成形性及易淬性，实现对22MnB5高强钢与7075铝合金的有效连接。通过建立HRQ无铆钉铆接的成形和淬冷有限元模型，证明了该工艺的可行性，使铆接后接头的高强钢具有全马氏体组织，保证了接头的强度。并从仿真和试验两方面研究高强钢铆接温度对接头尺寸颈厚值T_n、自锁值T_u的影响，发现在600～800 ℃区间内，T_n和T_u均呈现先上升后下降的趋势，T_u受温度影响更显著，两者均在700 ℃时获得最大值，表明700 ℃是高强钢板料的最佳铆接初始温度。

关键词: 高强钢, 铝合金, 铆接接头, 热铆接冷模具淬火, 无铆钉铆接

Abstract: For the current problems of connecting technique for high strength steel 22MnB5 and aluminum alloy 7075 sheets, a process called hot riveting quenching clinching to connect autobody parts of high strength steel and aluminum alloy dissimilar materials is proposed. By using good formability at elevated temperatures and quenchability of 22MnB5, effective joints between 22MnB5 and 7075 are obtained. The feasibility of hot riveting quenching clinching is confirmed by the forming and quenching finite element models. Full martensite structure of the 22MnB5 at riveted joints is formed, so that the strength of the joints is ensured. The effect of the riveting temperatures for the high strength steel on the joint dimensions like the neck thicker value T_n and the self-locking value T_u is studied from the aspects of simulation and experiment. The results indicate that the T_n and T_u both present a trend that increases first and then decreases, and the T_u is affected more significantly by temperature on the temperature range from 600 to 800 ℃. Both of the T_n and T_u reach the maximums at 700 ℃, and it can be concluded that 700 ℃ is the best initial temperature of the high strength steel plate for riveting.

Key words: aluminum alloy, clinching, high strength steel, hot riveting quenching, riveted joint

中图分类号:

TG156

庄蔚敏, 赵文增, 解东旋, 李兵. 22MnB5高强钢/7075铝合金热铆接冷模具淬火无铆钉铆接研究[J]. 机械工程学报, 2017, 53(20): 106-112.

ZHUANG Weimin, ZHAO Wenzeng, XIE Dongxuan, LI Bing. Research on Hot Riveting Quenching Clinching of the High Strength Steel 22MnB5 and Aluminum Alloy 7075[J]. Journal of Mechanical Engineering, 2017, 53(20): 106-112.

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22MnB5高强钢/7075铝合金热铆接冷模具淬火无铆钉铆接研究

Research on Hot Riveting Quenching Clinching of the High Strength Steel 22MnB5 and Aluminum Alloy 7075

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