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Technical Brief

Numerical and Experimental Study of Temperature Field for Double Electrode Gas Metal Arc Welding

[+] Author and Article Information
Yu Shi

Professor
Key Laboratory of Non-Ferrous
Metal Alloys and Processing,
The Ministry of Education,
Lanzhou University of Technology,
Lanzhou 730050, China
e-mail: shiyu73@gmail.com

Rihong Han, Jiankang Huang

Key Laboratory of Non-Ferrous
Metal Alloys and Processing,
The Ministry of Education,
Lanzhou University of Technology,
Lanzhou 730050, China

Shao Yan

Department of Electrical and Computer Engineering,
University of Kentucky,
Lexington, KY 40506

1Corresponding author.

2Mainly engaged in welding automation and numerical simulation of welding process.

Manuscript received October 27, 2011; final manuscript received July 31, 2013; published online January 20, 2014. Assoc. Editor: Wei Li.

J. Manuf. Sci. Eng 136(2), 024502 (Jan 20, 2014) (5 pages) Paper No: MANU-11-1348; doi: 10.1115/1.4025392 History: Received October 27, 2011; Revised July 31, 2013

Based on the features of double electrode gas metal arc welding (DE-GMAW), a new hybrid heat-source model for DE-GMAW was proposed. Using this heat-source model, the temperature fields of DE-GMAW with different welding parameters were simulated. According to the simulation results with different welding parameters, the influence of welding parameters to the heat input to base metal in DE-GMAW were analyzed. To verify the rationality of the hybrid heat-source model of DE-GMAW, the simulation results of the temperature field were compared with the experimental results with same welding parameters. The research results indicate that under the same total current, the heat input to base metal decrease gradually with the increase of by-pass current. In addition, the closer to the welding line from the measured point the greater decrease rate of the heat input to base metal. By the study and comparison of the thermal cycle curve of measured points, the simulation results were in good agreement with the experimental results. These results indicate that the calculated temperature field is accurate and the hybrid heat-source model is rational.

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References

Figures

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Fig. 5

Weld bead (a) total current is 300 A, bypass current is 0 A, and (b) total current is 300 A, bypass current is 100 A

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Fig. 4

Schematic diagram of coupling arc

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Fig. 3

Schematic diagram of measured points

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Fig. 2

Schematic diagram of work piece

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Fig. 1

Schematic diagram of DE-GMAW

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Fig. 6

Weld cross section (a) total current is 300 A, bypass current is 0 A, and (b) total current is 300 A, bypass current is 100 A

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Fig. 7

Simulation and experimental results of weld cross section (a) simulation result, and (b) experimental result (Total current is 300 A and bypass current is 160 A)

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Fig. 8

Simulation and experimental results of weld penetration

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Fig. 9

Thermal cycle curve of the measured points (a) by-pass current is 0 A, (b) by-pass current is 140 A, and (c) by-pass current is 220 A

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