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Simulation of Magnetic Flux Distribution for Magnetically Impelled Arc Butt Welding of Steel Tubes

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This paper proposes a 3-Dimensional Finite Element Model (FEM) for the simulation of magnetic flux distribution in a Magnetically Impelled Arc Butt (MIAB) welding process. The electromagnetic force responsible for the arc rotation in MIAB welding process is governed by the magnetic flux density in the gap, the arc current and the arc length (gap size). To be precise the radial magnetic flux density is a critical factor in arc rotation and weld quality.

The aim of this study is to explore the interdependence of the magnetic flux density and the existing current in the coils using finite element code ANSYS. The results of this analysis are verified with the available experimental data for steel pipes (outer dia 50mm and 2mm thickness). The results of the numerical simulation emphasize that the magnetic flux density in the gap between the pipes is proportional to the exciting current.

Affiliations: 1: Department of Electrical and Electronics Engineering, National Institute of Technology, Tiruchirappalli – 620 015; 2: Welding Research Institute, BHEL, Tiruchirappalli – 620 014


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