Influence of welding current and focal position on the resonant absorption of laser radiation in a TIG welding arc

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Emde, B.; Huse, M.; Hermsdorf, J.; Kaierle, S.; Wesling, V. et al.: Influence of welding current and focal position on the resonant absorption of laser radiation in a TIG welding arc. In: Physics Procedia 56 (2014), S. 646-652. DOI: https://doi.org/10.1016/j.phpro.2014.08.064

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The work presents the influence of welding current and focal position on the resonant absorption of diode laser radiation in a TIG welding arc. The laser beam is guided perpendicular to the electrical arc to avoid an interaction with the electrodes. Laser power measurements have shown a reduction of the measured laser power up to 18 % after passing the electrical arc. This reduction results from the interaction of argon shielding gas atoms and laser radiation at 810.4 nm and 811.5 nm. The interaction is strongly affected by the adjusted welding current and the adjustment of the laser beam and the electrical arc. Lowering the welding current or shifting the laser beam out of the centerline of the electrical arc reduces the ionization probability. An increased ionization is necessary to decrease the resistance of the electrical arc.
License of this version: CC BY-NC-ND 3.0 Unported
Document Type: article
Publishing status: publishedVersion
Issue Date: 2014
Appears in Collections:An-Institute

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1 image of flag of Germany Germany 43 59.72%
2 image of flag of China China 9 12.50%
3 image of flag of United States United States 3 4.17%
4 image of flag of Hong Kong Hong Kong 3 4.17%
5 image of flag of Russian Federation Russian Federation 2 2.78%
6 image of flag of Colombia Colombia 2 2.78%
7 image of flag of Turkey Turkey 1 1.39%
8 image of flag of Poland Poland 1 1.39%
9 image of flag of Netherlands Netherlands 1 1.39%
10 image of flag of Korea, Republic of Korea, Republic of 1 1.39%
    other countries 6 8.33%

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