| 摘要 |
PURPOSE:To prevent lack of fusion in the base or end part of a groove and to accomplish satisfactory welding by preheating uniformly the part just before the gas shielded arc weld bead part by a consumable electrode with a TIG torch of a rotating eccentric tungsten electrode. CONSTITUTION:The arc 7 just before the bead part 4 of gas shielded arc welding by a consumable electrode 3 is preheated uniformly by a TIG torch 5 using a rotating eccentric tungsten electrode 6. The molten electrode arrives at the base and end part of the groove of the bead part 4 and is satisfactorily deposited thereon, by which the satisfactory welding is accomplished. |
