摘要
针对6061-T6铝合金机器人搅拌摩擦焊(RFSW)展开研究,首先在库卡机器人的末端和搅拌摩擦焊电主轴之间安装六维力传感器,搭建六维力传感器数据采集系统。其次采用不同的工艺参数对5 mm 6061-T6铝合金进行焊接,在焊接过程中实时监测搅拌头受到的轴向力和前进抗力,焊后对焊缝横截面进行观察与分析,对焊缝横截面进行拉伸测试和硬度测量,分析轴向力和前进抗力对焊缝微观组织及力学性能的影响。结果表明:搅拌头转速在800~3400 r/min之间,搅拌头转速对焊缝力学性能影响较小;焊接速度在60~360 mm/min之间,焊缝力学性能良好。焊接过程中搅拌针下压阶段轴向力最大,达到约5000 N,焊接阶段稳定时,轴向力约为3600 N,焊接阶段前进抗力最大,达到约−550 N。在焊接过程中,轴向力/前进抗力的比值为−6.5左右时焊缝性能良好。
This article focuses on the 6061-T6 aluminum alloy robot friction stir welding(RFSW).Firstly,a six-dimensional force sensor was installed between the end of the KUKA robot and the friction stir welding electric spindle to build a six-dimensional force sensor data acquisition system.Secondly,the 5 mm 6061-T6 aluminum alloy was welded at different process parameters.During the welding process,the axial force and forward resistance of the stirring head were monitored in real time.After welding,the cross section of the weld was observed and analyzed.The section was subjected to tensile test and hardness measurement to analyze the influence of axial force and forward resistance on the microstructure and mechanical properties of the weld.The results show that the speed of the stirring head is between 800 and 3400 r/min,and the speed of the stirring head has little effect on the mechanical properties of the weld;the welding speed is between 60 and 360 mm/min,and the mechanical properties of the weld are good.During the welding process,the axial force of the stirring pin is the largest in the pressing stage,which reaches about 5000 N.When the welding stage is stable,the axial force is about 3600 N,and the forward resistance of the welding stage is the largest,reaching about−550 N.In the welding process,the performance of the weld is good when the ratio of axial force/forward resistance is about−6.5.
作者
陈树君
孔德兵
董建涛
蒋晓青
袁涛
CHEN Shu-jun;KONG De-bing;DONG Jian-tao;JIANG Xiao-qing;YUAN Tao(Institute of Intelligent Forming Equipment and System,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China;Capital Aerospace Machinery Company,Beijing 100076,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2021年第4期956-967,共12页
The Chinese Journal of Nonferrous Metals
基金
国家重点研发计划资助项目(2018YFB1306400)。
