| 摘要 |
PURPOSE:To improve the welding quality and the yield of a product by bringing an end tab and a side edge of an end part of a base metal thin plate to tack welding continuously, and subsequently, cutting down linearly a part containing a defect, etc. and executing regular welding, and removing the end tab. CONSTITUTION:Against base metal thin plates 11, 12 of Al, etc., and tabs 13, 14 are placed on the same level, the side edge of the end part of the thin plates 11, 12 and the side edge of the end tabs 13, 14 are tacked by fusion welding, and beads 15, 16 are formed. Subsequently, a part of 2w width containing defective through-holes 17, 18 is cut down linearly extending over plates 11, 12, 13 and 14, and a groove is formed in cut positions 21, 22. In this groove part, a regular weld bead 23 is formed, and thereafter, the end tabs 13, 14 are cut and removed along the side edge of the thin plates 11, 12. According to this method, the defective parts 17, 18 which are generated at the time of tack welding are removed in advance and the regular welding is executed, therefore, the welding quality and the yield of a product are improved. |
