Study on Thermal-Magnetic Inversion Imaging of Nugget in Aluminum Alloy RSW
RSW process is a complicated phenomenon, which involves mechanical, thermal, electrical, magnetic and metallurgical factors. Because the process is ephemeral and welding joint region is close, it is difficult to monitor the weld quality effectively. The disadvantage of RSW quality monitoring system limits its application on the fields where higher welding quality is required. So this paper introduces the inverse problem theory, and utilizes the magnetic field and temperature field during RSW to calculate the current distribution in nugget cross-section. The inversion image can be used to evaluate welding quality intuitively, which provides new criterion to judge welding quality. Thereby, we can analyze the characteristics of inversion image, the effect of different sensor arrangements and the relations between current distribution and temperature field through theories and welding experiments. The thermal-magnetic inversion results show that the inversion image reflects the characteristics of nugget current distribution to a certain extent, which can be used to evaluate the weld quality. During four arrangements, the result of line arrangements is best, which fits close to the theories result.
inverse heat conduction problem inversion image welding quality monitoring resistance spot welding
Di Zhang Zhen Luo Wenbo Xuan
School of Material Science and Engineering, Tianjin University, Tianjin 300072, China Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China
国际会议
济南
英文
1-9
2012-08-24（万方平台首次上网日期，不代表论文的发表时间）