Analysis of Electromagnetic Inverse Model of Resistance Spot Welding

Abstract:

Resistance spot welding (RSW) is an important welding process in modern industrial production, and the quality of welding nugget determines the strength of products to a large extent. Limited by the level of RSW quality monitor, however, RSW has rarely been applied to the fields with high welding quality requirements. Associated with the inversion theory, in this paper, an electromagnetic inverse model of RSW was established, and the analysis of influence factors, such as the layout of the probes, the discrete program and the regularization method, was implemented as well. The result shows that the layout of the probe and the regularization method has great influence on the model. When the probe is located at the y direction of x-axis or the x direction of y-axis and Conjugate Gradient method is selected, a much better outcome can be achieved.

• Periodical: Advanced Materials Research (Volumes 160-162)
• Pages: 974-979
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.160-162.974
• Online since: November 2010
• Authors: Nai Feng Fan, Zhen Luo, Yang Li, Wen Bo Xuan
• Keywords: Ill-Posed, Magnetic Flux Density, Model Discrete, Regularization Method, Resistance Spot Welding (RSW)

References

[1] Zhang.H. Expulsing and Its Influence on Weld Quality [J]. Welding Journal, 1999, 78(11): 373-380.

[2] Xue Zhiqing. Research on Inversion Imaging of Nugget Cross-section in Aluminum Alloy RSW [D]. Tianjin: Tianjin University, 2009, 19~20.

[3] Zhao Kaihua, Chen Ximou. Electromagnetic [M]. Beijing, Higher Education Press, (1985).

[4] Li Yongping, Zhang Fan. Magnetic Distribution of Circle Current [J]. Academic Newspaper of Jinan University, 1998, 8(4), 61~64.

[5] Liu Jijun. The regulation method of Ill-posed problems [M]. Beijing, Science Press, (2005).

[6] J. E. Marsden L. Sirovich F. John. An Introduction to the Mathematical Theory of Inverse Problems [M]. Springer-Verlag, (1999).