Research on the welding force and temperature of micro friction stir welded 1060 aluminum plates

纯铝1060搅拌摩擦微连接焊接力及温度研究 Research on the welding force and temperature of micro friction stir welded 1060 aluminum plates 金鑫 JIN Xin 1 first-author 熊亮 XIONG Liang 1 向勇 XIANG Yong 1 刘晓 LIU Xiao 2 史煜 SHI Yu 2 张昌青 ZHANG Changqing 2 中车成都机车车辆有限公司 中车成都机车车辆有限公司 CRRC Chengdu Co.,Ltd. CRRC Chengdu Co.,Ltd. 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室 兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室 State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials,Lanzhou University of Technology 搅拌摩擦焊过程中各物理量的采集分析为理解接头形成过程及质量影响因素提供重要的数据支持。为研究搅拌摩擦微连接过程中焊接力及温度的变化情况,利用自制的监测系统对0.8 mm厚1060-H24超薄铝板搅拌摩擦微连接过程中的焊接力及不同搅拌头转速下的焊缝温度进行了实时测量采集。研究结果表明:搅拌头转速为11 000 r/min时焊缝温度最高,达到约350℃,因焊接过程中的搅拌摩擦作用,焊缝金属受热充足流动性好,易形成表面形貌美观且性能优良的搅拌摩擦微连接接头;搅拌头下压驻留后,在初始焊接阶段,焊接轴向力保持在约50 N,持续2 s后因母材受热严重软化导致轴向力开始迅速下降,降至约30 N后稳定焊接。在焊接阶段中焊接横向力始终保持在20～40 N范围内小幅度波动。 Record and analysis of physical quantities in the friction stir welding process could provide significant data support for understanding joint formation process and factors which effect weld quality. In this paper,0.8 mm thick 1060-H24 ultra-thin aluminum plates were welded by micro friction stir welding,with the aim to study the changes of welding force and temperature in the welding process. A self-made monitoring system was used to measure the welding force and temperature under different tool rotation speeds in real time.The result of this study shows that the weld temperature reaches highest,that is about 350 ℃,when the stirring speed is 11 000 r/min. At that temperature,the base metal reached the plasticized state and weld metal has good fluidity. Therefore,the joint with high performance and a surface free from defect could be easily formed. After the stir tool is pressed into the base metal,in the initial stage of welding,the axial force is maintained at about 50 N. After 2 s,it rapidly drops to about 30 N and remains until the stir tool reaching the end of base metal. And in this process,the transverse force remains stable which is about 20～40 N with small positive fluctuations. 搅拌摩擦微连接 焊接力 焊接温度 监测系统 micro friction stir welding welding force welding temperature monitoring system TG453.9 2022-03-08 6 51