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http://dx.doi.org/10.5781/KWJS.2010.28.6.021

Control of Molten Pool by Physical Force of Bead Former in TIG Welding of Overhead and Inclined-up Position  

Ham, Hyo-Sik (Dept. of Materials Processing Eng., Graduate School, Pukyong National Univ.)
Ha, Jong-Moon (Dept. of Materials Processing Eng., Graduate School, Pukyong National Univ.)
Lee, Byung-Woo (Div. of Advanced Materials Sci. and Eng., Dept. of Materials Processing Eng., Pukyong National Univ.)
Cho, Sang-Myung (Div. of Advanced Materials Sci. and Eng., Dept. of Materials Processing Eng., Pukyong National Univ.)
Publication Information
Journal of Welding and Joining / v.28, no.6, 2010 , pp. 21-27 More about this Journal
Abstract
Due to excellent weld quality, orbital welding with TIG is widely applied to pipe welding. But concave back bead is formed easily in overhead and inclined-up position of butt orbital welding. It is difficult to find a paper to overcome this problem. In this study, in order to make convex back bead in overhead and inclined-up position of pipe 5G welding, control method of molten pool was actively investigated. Melt run welds were conducted on thickness 4.0mm SS400 with overhead and inclined-up position and was observed the variation of bead shape after welding with the bead former developed. The height of back bead showed the trend of increase as the distance from molten pool to the bead former was decreased. Also, there is no trend in the bead width of front and back as welding position was changed or the distance from molten pool to the bead former was decreased.
Keywords
TIG welding; Orbital welding; Overhead position; Inclined-up position; 5G welding; Convex back bead; Concave back bead; Bead former; Distance from molten pool to the bead former;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 R. T. C Choo, J. Szekely and R. C. Westhoff : Modeling of High-Current Arcs with Emphasis on Free Surface Phenomena in the Weld Pool, Welding Journal, AWS, 69(9), 1990, 346s-361s
2 J. F. Lancaster : The Physics of Welding, Pergamon Press, England, 1984
3 M. Satou : Fundamentals of Welding, Arc Phenomenon, Journal of the Japan Welding Engineering Society, 45-9, 149-153. (in Japanese)
4 N. S. Tsai, : Heat Distribution and Weld Geometry in Arc Welding, Doctor of Philosophy, MIT, 1983
5 Sang-Myung Cho and Sang-Goun Seo : The Effecct of Congiguration and Surface Polishing in Tungsten Electrode Tip for Gas Tungsten Arc Welding on the Arc Characteristics, Journal of KWS, 19-1 (2001), 33-39 (in Korean)
6 Hyo-won Kim, Sang-Myung Cho : A Study on Back Bead Formation in Inclined-up Position of Plasma Arc Orbital Welding, Journal of KWJS, 27-1 (2009), 71-78 (in Korean)
7 Hyo-Sik Ham, Jong-Moon Ha, Sung-Bin Im, Dong-Soo Oh, Sang-Myung Cho : Measurement and Application of Arc pressure & Shield gas pressure effect on surface of weldpool in TIG welding, Abstracts of 2009 Spring Annual Meeting of KWJS, 51 (2009). 61-61 (in Korean)
8 Jong-Moon Ha, Hyo-Sik Ham, Sung-Bin Im, Dong-Soo Oh, Sang-Myung Cho : The Effect of Surface Shield Gas on Back Bead at Overhead and Vertical Up Position in TIG Welding, Abstracts of 2009 Spring Annual Meeting of KWJS, 52 (2009). Journal of KWJS, KWJS 2009-Autumn (2009). 23-23 (in Korean)
9 Ki-Joung Kim, Jin-Woo Kim, Youn-Bae Kang, Sang- Myung Cho : Heat transfer simulation and temperature measurement for heat input control in orbital welding, Proceedings of 2003 Spring Annual Meeting of KWS, 40 (2003), 155-158 (in Korean)   과학기술학회마을
10 Jin-Woo Kim, Sang-Myung Cho : The effect of the arc pressure variation on the penetration by the filler wire feed rate in pulsed TIG welding, Journal of KWS, 22-1 (2004), 71-76 (in Korean)
11 Ki-Joung Kim, Jin-Woo Kim, Youn-Bae Kang, Sang- Myung Cho : Heat input control in orbital GTA welding to stainless steel and mild steel pipes, Journal of KSME, (2002. 11), 2881-2885 (in Korean)
12 Patrcio F. Mendez, Krista L. Niece and Tomas W. Eagar : Humping Formation High Current GTA Welding, ASM International, In proceedings International Conference on Joining of Advanced and Speciality Materials II, (Materials Solutions Conference and Exposition), OH, (ASM International), November 1999