Improving of Energy Density in Welding Arc and its Mechanism Study

Abstract:

As to traditional single electrode free welding arc, changes about energy density of the ionizing region in the center of arc column is not obvious with current increases due to structural limitations. In this paper, we developed parallel multi-electrode arc discharge torch which is based on the mechanism of self-magnetic contraction effect in welding arc, the torch effectively improve energy density of ionization region in non-melting inert gas arc, which is proved by experiments, and we discussed, effect of the pulse input energy and pulse frequency to energy density of the arc with parallel multi-electrode torch. This study demonstrated the approach of improving the energy density of arc ionizing region by self-magnetic pinch effect is feasible.

• Periodical: Advanced Materials Research (Volume 711)
• Pages: 229-234
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.711.229
• Online since: June 2013
• Authors: Tian Jiao Xiao, Yong Lun Song, Qiu Shi Hu, Chao Li
• Keywords: High-Energy Welding Arc, Parallel Multi-Electrode Torch, Pulse Arc, Self-Magnetic Contraction, Spectrum Diagnostic

References

[1] Song Yonglun,Yang Xiaohong, Ran Guowei; Xiao Tianjiao, Yan Si Bo, Residual stress characteristics of butt-welded flange by Finite element analysis，Frontiers of Materials Science, 2011, 5(2): 216-223

DOI: 10.1007/s11706-011-0122-8

[2] Lin Jiangbo, Song Yonglun，Ran Guowei; Zhang Wanchun，Luo Chuanguang. An investigation on the performance of stress corrosion cracking in aliminum-copper alloy welded joint, China Welding, 2011, 20(2): 67-72.

[3] A. Kumar et al: Effect of welding parameters on mechanical properties and optimization of pulsed TIG welding of Al-Mg-Si alloy，Int J Adv Manuf Technol, (42):118–125 (2009)

DOI: 10.1007/s00170-008-1572-8

[4] V.K. GOYAL et al: Process-Controlled Microstructure and Cast Morphology of Dendrite in Pulsed-Current Gas-Metal Arc Weld Deposits of Aluminum and Al-Mg Alloy, Metallurgical and Materials Transactions, 38A(8) 1794-1805 (2007)

DOI: 10.1007/s11661-007-9217-3

[5] A M Essiptchouk et al: Thermal and power characteristics of plasma torch with reverse vortex, J. Phys. D: Appl. Phys. 42 1-6 (2009)

[6] R. Bini et al: Effect of Cathode Nozzle Geometry and Process Parameters on the Energy Distribution for an Argon Transferred Arc, Plasma Chem Plasma Process, (27) 359–380 (2007)

DOI: 10.1007/s11090-007-9083-1

[7] Toru Iwao et al: Numerical simulation of argon twin torch plasma arc for high heating efficiency, Vacuum, 83 34–38 (2009)

DOI: 10.1016/j.vacuum.2008.03.095

[8] S. Ghorui et al:Probing instabilities in arc plasma devices using binary gas mixtures, PHYSICAL REVIEW E 76, 016404.1-13 (2007)

DOI: 10.1103/physreve.76.016404

[9] Janos Dobranszky et al: Characterisation of the plasma shape of the TIG welding arc, Int. J. Microstructure and Materials Properties, 3(1) 126-140 (2008)

DOI: 10.1504/ijmmp.2008.016949

[10] H.R. Griem. Spectral Line Broadening by Plasmas. Academic Press. New York,(1974)