| 위보기 및 경사상진자세의 TIG 용접에서 비드 성형기의 물리적 힘에 의한 용융지 제어 |
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| Control of Molten Pool by Physical Force of Bead Former in TIG Welding of Overhead and Inclined-up Position |
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Hyo-Sik Ham, Jong-Moon Ha, Byung-Woo Lee, Sang-Myung Cho |
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| Abstract |
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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. |
| Key Words:
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 |
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