• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2020, Vol. 56 ›› Issue (6): 159-168.doi: 10.3901/JME.2020.06.159

• 电阻点焊、铆接与其他点连接方法 • 上一篇    下一篇

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铆钉结构对铝合金板搅拌摩擦单面铆接穿透力的影响研究

闵峻英, 张凯, 王爽, 林建平   

  1. 同济大学机械与能源工程学院 上海 201804
  • 收稿日期:2019-08-27 修回日期:2019-11-17 出版日期:2020-03-20 发布日期:2020-05-12
  • 作者简介:闵峻英(通信作者),男,1986年出生,博士,教授,博士研究生导师。主要研究方向为先进成形制造技术、异种材料连接技术等。E-mail:junying.min@tongji.edu.cn;
    张凯,男,1987年出生,博士研究生。主要研究方向为异种材料连接技术。E-mail:zknevsnev@163.com;
    王爽,女,1995年出生,硕士研究生。主要研究方向为异种材料连接技术。E-mail:18143093279@163.com;
    林建平,男,1958年出生,博士,教授,博士研究生导师。主要研究方向为汽车轻量化与先进成形制造技术等。E-mail:jplin58@tongji.edu.cn
  • 基金资助:
    国家自然科学基金(51805375)和上海交通大学机械系统与振动国家重点实验室开放基金(MSV201814)资助项目。

Effects of Rivet Structure on Penetration Force in Friction Stir Blind Riveting of Aluminum Alloy Sheets

MIN Junying, ZHANG Kai, WANG Shuang, LIN Jianping   

  1. School of Mechanical Engineering, Tongji University, Shanghai 201804
  • Received:2019-08-27 Revised:2019-11-17 Online:2020-03-20 Published:2020-05-12

摘要: 利用三种基于不同铆钉穿透机理的搅拌摩擦单面铆接工艺(Friction stir blind riveting,FSBR)对AA6061-T6(厚度为1 mm)与AA6022-T4(厚度为2 mm)铝合金板进行了铆接。发现完全依靠挤压机理实现铆钉穿透的工艺(FSBR-III),其最大铆钉穿透力比另外两种同时依靠挤压与切削机理实现铆钉穿透的工艺(即FSBR-I和FSBR-II)分别高33%与83%。通过分析铆钉穿透单一工件的过程,建立了工件材料去除率与铆钉穿透力的关系曲线,并综合考虑铆钉穿透机理以及摩擦热的影响,分析了穿透过程中不同结构铆钉的穿透力变化规律。研究发现,挤压机理在铆钉穿透机理中所占比重越高,则相同材料去除率下铆钉穿透力越大,同时穿透力受摩擦热的影响越明显。此外,通过接头断面观察,发现铆钉切削性能更优异的FSBR-II,所得接头中的上下工件间隙最小;FSBR-I与FSBR-II工艺会产生切屑,而在FSBR-III连接过程中没有切屑产生。

关键词: 铝合金, 搅拌摩擦, 穿透力, 铆钉结构

Abstract: AA6061-T6(1 mm) and AA6022-T4(2 mm) aluminum alloy sheets are fabricated by three friction stir blind riveting (FSBR) processes with different rivet penetration mechanisms. It is found that the rivet penetration force of FSBR-III with the penetration mechanism of extrusion, is 33% and 83% respectively higher than the other two FSBR processes (i.e. FSBR-I and FSBR-II), where the penetration mechanism is a combination of extrusion and cutting. For the penetration process of upper plate, the relationship between material removal rate and the penetration force is discussed in terms of the penetration mechanism and the influence of frictional heat. It is found that the penetration force at the same material removal rate is larger when the proportion of extrusion is dominated in the rivet penetration mechanism, and the penetration force is more sensitive to the frictional heat. In addition, by observing the cross-sections of joints, it is found that the FSBR-II joint possesses the smallest gap between upper and lower workpieces due to superior cutting performance of the rivet, and FSBR-I and FSBR-II produced chips during the penetration process, while no chips were generated in the penetration process of FSBR-III.

Key words: aluminum alloy, friction stir, penetration force, rivet structure

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