| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem that the Zn-based plating is evaporated due to heat in the welding and is made to vaporize when the arc-welding of a Zn-plated steel sheet member is performed, so that the Zn vapor remains in a weld metal and may cause weld defects as referred to as a blowhole, and therefore, normally some gaps are made between members to be welded and the welding is performed to prevent the occurrence of the blowhole, however it is difficult to secure some gaps with a simple and easy method.SOLUTION: Compression or shearing deformation is applied in some area of the end of one member among two members to be welded to form a protrusion at the end of the member, or half die cutting shearing is performed on some area of the surface to form the protrusion at the unilateral surface of the member. The two members to be welded are brought into abutment with each other through the protrusion, and thereby the arc welding is performed in the state where the gaps between the members are secured reliably. |
