Magnetism-current inverse image reconstruction of the nugget in aluminum alloy spot welding based on ART algorithm

Zhi-qing XUE; Zhen LUO; Ping SHAN; Xin-xin TANG; An DONG; San-san AO; Xiao-yi LI

doi:10.1007/s11706-009-0009-0

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Front. Mater. Sci. ›› 2009, Vol. 3 ›› Issue (1) : 89-92. DOI: 10.1007/s11706-009-0009-0

RESEARCH ARTICLE

Magnetism-current inverse image reconstruction of the nugget in aluminum alloy spot welding based on ART algorithm

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Abstract

In this work, the computer tomography (CT) theory and its reconstruction algorithm were used to deal with the magnetism-current inverse problem in the resistance spot welding (RSW). At first, the magnetic fields around the nugget were detected. Then, the current distribution of the nugget section was calculated by reconstruction algorithm. At last, we changed the current distribution data into a graph using Matlab. The inversed graph of the nugget-section current distribution in the inverted RSW can be achieved, and by this graph the details of the nugget can be observed directly, which can help evaluate the joint quality.

Keywords

resistance spot welding (RSW) / reconstruct algorithm / inversed imagery / nugget / magnetic signals

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Zhi-qing XUE, Zhen LUO, Ping SHAN, Xin-xin TANG, An DONG, San-san AO, Xiao-yi LI. Magnetism-current inverse image reconstruction of the nugget in aluminum alloy spot welding based on ART algorithm. Front Mater Sci Chin, 2009, 3(1): 89‒92 https://doi.org/10.1007/s11706-009-0009-0

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Acknowledgments

We are grateful to Feng YE for theory support and Rui WANG for assistance in recording data. This work was supported by the National Natural Science Foundation of China (Grant No. 50575159), the Project of Chinese Ministry of Education (Grant No. 106049, 20060056058), the Natural Science Foundation of Tianjin (06YFJMJC03400), and the Natural High-Tech R& 863 Program (2008AA04Z136).