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Numerical investigation of heat flux distribution on the welding groove face in magnetic oscillation arc narrow gap GTAW

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Abstract

Obtaining uniform penetration on welding groove faces is one urgent problem in oscillation arc narrow gap welding; however, the heat flux distribution on the groove face under the deflected welding arc is difficult to investigate by the experimental method. In this article, a unified three-dimensional model is developed to study the heat flux distribution on groove faces. The model includes the electrode, welding arc, workpiece, and their coupling. The plasma arc profile, heat flux characteristics, and weld pool formation were simulated. Based on the simulation results, the following conclusions were contained. The deflecting degree of the welding arc axis is increased with the increasing of extra magnetic-field intensity, and this leads to the change of the distribution of conduction heat flux and electric heat flux. At the groove bottom, both heat fluxes move to one side, and their distribution shape changes from circular to elliptical. At the sidewall, the distribution shape of conduction heat flux is triangular, and that of electrical heat flux is elliptical. The maximum value of heat flux density decreased, and the affected area was increased with the associate of the extra magnetic field. The simulation welding bead was in agreement with the experimental result.

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Funding

This study was supported by the National Natural Science Foundation of China (grant no. 51705133) and the Open Research Fund Program of Hubei Provincial Key Laboratory of Chemical Equipment Intensification and Intrinsic Safety (grant no. 2019KA02), and Wuhan Institute of Technology Science Foundation (grant no. K202009).

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Authors and Affiliations

  1. School of Mechanical and Electrical Engineering, Wuhan Institute of Technology, Guanggu 1st road, Wuhan, 430205, People’s Republic of China

    Jian Xiaoxia & Wu Hebao

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  1. Jian Xiaoxia
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  2. Wu Hebao
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Contributions

The corresponding author X.J. was responsible for writing this paper, planning, simulation, and experiment. H.W. was responsible for supervising the mechanical analysis.

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Correspondence to Jian Xiaoxia.

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Xiaoxia, J., Hebao, W. Numerical investigation of heat flux distribution on the welding groove face in magnetic oscillation arc narrow gap GTAW. Int J Adv Manuf Technol 113, 2315–2325 (2021). https://doi.org/10.1007/s00170-021-06735-x

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  • DOI: https://doi.org/10.1007/s00170-021-06735-x

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