螺纹铆钉式搅拌摩擦铆焊塑性连接机理及接头力学性能研究

doi:10.3901/JME.2022.08.126

机械工程学报 ›› 2022, Vol. 58 ›› Issue (8): 126-135.doi: 10.3901/JME.2022.08.126

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螺纹铆钉式搅拌摩擦铆焊塑性连接机理及接头力学性能研究

张鹏^1,2, 赵升吨¹, 张传伟², 陈政³, 费亮瑜¹, 张佳莹¹

1. 西安交通大学机械工程学院西安 710049;
2. 西安科技大学机械工程学院西安 710054;
3. 西安物华巨能爆破器材有限责任公司研发中心西安 710061

收稿日期:2021-03-29 修回日期:2021-06-04 出版日期:2022-04-20 发布日期:2022-06-13
通讯作者: 赵升吨(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为先进连接技术、特种加工与塑性成形。E-mail:sdzhao@xjtu.edu.cn
作者简介:张鹏,男,1990年出生,博士研究生。主要研究方向为轻量化板材的先进连接。E-mail:czzpzhang@163.com
基金资助:
国家自然科学基金(51675414)和陕西省自然科学基础研究计划企业联合基金(2019JLP-06)资助项目。

Study on Plastic Joining Mechanism of Friction Stir Rivet Welding Using Threaded Rivet and Mechanical Properties of Its Joints

ZHANG Peng^1,2, ZHAO Shengdun¹, ZHANG Chuanwei², CHEN Zheng³, FEI Liangyu¹, ZHANG Jiaying¹

1. School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049;
2. College of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an 710054;
3. Research and Development Center, Xi'an Wuhua Juneng Blasting Equipment Co., Ltd., Xi'an 710061

Received:2021-03-29 Revised:2021-06-04 Online:2022-04-20 Published:2022-06-13

摘要/Abstract

摘要： 为了获得铝合金板材高性能点连接接头，兼顾机械连接与固相焊接的技术优势，采用不同焊具开展了铝合金板材搅拌摩擦铆焊试验。对比研究铆焊成形力、接头形貌及塑性变形机理和力学性能及失效行为，以期阐明螺纹铆钉式搅拌摩擦铆焊工艺对接头性能的强化机制。结果表明：搅拌摩擦铆焊过程中，随工具头位移变化，铆焊成形力呈先迅速增大、达到峰值后在一定范围内保持最后迅速降低的变化趋势；螺纹铆钉搅拌摩擦铆焊接头上下板材之间形成了冶金结合，螺纹铆钉与塑化材料之间形成机械连接；轴肩下方上板的有效板厚、搅拌区的有效结合宽度以及铆钉与被焊材料的有效铆合高度是影响螺纹铆钉搅拌摩擦铆焊接头力学性能的关键技术参数；螺纹铆钉搅拌摩擦铆焊接头的拉伸剪切峰值载荷达到了传统搅拌摩擦点焊接头的1.65倍，十字拉伸峰值载荷达到了传统搅拌摩擦点焊接头的2.7倍。

关键词: 搅拌摩擦铆焊, 螺纹铆钉, 材料流动, 连接机理, 力学性能

Abstract: In order to obtain high-performance spot joints of aluminum alloy sheets and combine the advantages of mechanical joining and metallurgical bonding, different welding tools are employed to joining aluminum alloy sheets using friction stir rivet welding (FSRW) method. The main spindle welding force, macrostructure and plastic deformation mechanism, and mechanical properties as well as failure behaviors of the three type joints are comparatively investigated to clarify the strengthening mechanism of the joints' mechanical properties via threaded rivet FSRW process. The results indicate that with the feeding of the main spindle, the welding force decreases slightly after increases to the peak rapidly, and then decreases to a minimum until the main spindle retreat back during the FSRW process. Metallurgical bonding is formed between the upper and lower sheets of the threaded rivet FSRWed joint, while mechanical riveting is formed between the threaded rivet and the plasticized material. The effective thickness of the upper sheet under the shoulder, the effective bonding width of the stirring zone, and the effective riveting height between the rivet and the welded material are the most important process parameters that affect the mechanical properties of the threaded rivet FSRWed joints. The maximum tensile shear load of the threaded rivet FSRWed joint is 1.65 times that of the FSSWed joint, while the maximum cross tensile load is 2.7 times.

Key words: friction stir rivet welding, threaded rivet, material flow behavior, joining mechanism, mechanical property

中图分类号:

TG441

张鹏, 赵升吨, 张传伟, 陈政, 费亮瑜, 张佳莹. 螺纹铆钉式搅拌摩擦铆焊塑性连接机理及接头力学性能研究[J]. 机械工程学报, 2022, 58(8): 126-135.

ZHANG Peng, ZHAO Shengdun, ZHANG Chuanwei, CHEN Zheng, FEI Liangyu, ZHANG Jiaying. Study on Plastic Joining Mechanism of Friction Stir Rivet Welding Using Threaded Rivet and Mechanical Properties of Its Joints[J]. Journal of Mechanical Engineering, 2022, 58(8): 126-135.

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螺纹铆钉式搅拌摩擦铆焊塑性连接机理及接头力学性能研究

Study on Plastic Joining Mechanism of Friction Stir Rivet Welding Using Threaded Rivet and Mechanical Properties of Its Joints

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