Browse > Article

The Characteristics on Arc Pressure Distribution of TIG Welding with Shield Gas Mixing Ratio  

Oh Dong-Soo (Dept. of Plant Facility Automation, Changwon Polytechnic College)
Kim Yeong-Sik (Major of Machine Design & Manufacturing Automation Eng., Div. of Mechanical Engineering, Pukyong National University)
Cho Sang-Myung (Course of Materials Processing Eng., Div. of Materials Science & Engineering, Pukyong National University)
Publication Information
Journal of Welding and Joining / v.23, no.1, 2005 , pp. 41-47 More about this Journal
Abstract
Arc pressure is one of important factors in understanding physical arc phenomena. Especially it affects on the penetration, size and shape of TIG welding. Some researches were reported on the effect of arc pressure in low and middle current region. But there are not any research in high current region. The purpose of this study is to investigate the arc pressure distribution with mixing ratio of shield gas such as Ar and He gases. A Cu block with water cooling was specifically designed and used as an anode electrode in order to measure the arc pressure in high current region. Then, the arc pressure distribution was measured with change in welding current and mixing ratio of shield gases. The arc force was obtained by numerically integrating the measured results. As the results, it was shown that the arc pressure was concentrated at the central part of the arc in middle and high current regions when a pure Ar gas was used. In case of Ar + He mixing gas, the arc pressure was much lower than that of pure Ar gas. In addition, it was widely distributed to radial direction.
Keywords
TIG welding; Arc pressure distribution; Shield gas mixing ratio; Maximum arc pressure; Arc force;
Citations & Related Records
연도 인용수 순위
  • Reference
1 安蕂, 長谷川 : 溶接ア-ク現象(增補版), 産報, 1967, 150. (in Japanese)
2 M. Suban and J. Tusek : Dependence of Melting in MIG/MAG Welding on the Type of Shielding Gas Used, Journal of Materials Processing Technology, 119(2001), 185-192   DOI   ScienceOn
3 AWS : Welding Handbook. Vol. 2. 8th ed. (1991). 91-93
4 K. Hiraoka, A. Okada and M. Inagaki : Effect of Electrode Geometry on Maximum Arc Pressure in Gas Tungsten Arc Welding, Journal of JWS, 3-2 (1985). 246-252(jn Japanese)
5 S.D. Kim and S.J. Na : Effect of Weld Pool Deformation on Weld Penetration in Stationary Gas Tungsten Arc Welding, Welding Journal, 71-5(1992), 179s-193s
6 M.L. Lin and T.W. Eagar : Pressure Produced by Gas Tungsten Arcs. METAlLURGICAL TRANSACTIONS B. 17B(1989). 601-609   DOI
7 K. Ando, J. Nishikawa, and H. Wada : A Consideration on the Mechanism of Penetration in Arc Welding, Journal of JWS, 37-4(1968), 359-368(jn Japanese)
8 J. Converti : Plasma Jets in Arc Welding, Ph. D. Thesis. MIT. Cambridge. MA. 1981
9 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, 69-9(1990). 346s-361s
10 ランカスタ-編著 : 溶接ア-ク物理, 社團法人 溶接協會 溶接 ア-ク物理硏究委員會, (1990), 298 (in Japanese)
11 H. Maecker : Z. Phys., vol. 141(1955), 198-216   DOI
12 日本溶接協會編 : 新版ティグ溶接法の基礎と實際, 産報出版, 1992(in Japanese)
13 Mondain-Moval : I.I.W Document. 212-264-73 (1973)
14 S.M. Cho : A Study on the Bead Stability in High Speed TIG Welding. KOSME. 18-3. 1994, 68-77
15 Sang-Myung Cho, Sang-Goun Seo : The Effect of Configuration and Surface Polishing in Tungsten Arc Welding on the Arc Characteristics, KWS. 19-1 (2001), 33-39(in Korean)
16 ランカスタ-編著 : 溶接ア-ク物理, 社團法人 溶接協會 溶接ア-ク物理硏究委員會 (1990), 242-246 (in Japanese)
17 K. Hiraoka, A. Okada and M. Inagaki : Effect of He Gas on Arc Characteristic in Gas Tungsten Arc Welding, Journal of JWS, 3-2(1985).241-246 (in Japanese)
18 S. I. Rokhlin and A. C. Guu : A Study of Arc Force, Pool Depression, and Penetration During Gas Tungsten Arc Welding, Welding Journal, 72-12(1992), 381s-390s