| 摘要 |
PURPOSE:To prevent a detective joining by arranging a thick patching member, overlapping a connection member and the patching member each other as well via an intermediate very thin member and continuously welding the connection member and patching member simultaneously to the very thin member. CONSTITUTION:In the case of performing the joint welding of a vacuum joint 2 and very thin member 1, a thick patching member 4 is first prepared by forming it in the necessary dimension. A welding allowance 5 is then provided by overlapping the patching member 4 and connection member 3 by pinching the very thin member 1 in the medium. A filler metal is melted by the TIG welding machine stabilizing an arc and for the welding allowance 5 the joining member 3 and patching member 4 are simultaneously welded continuously at joining parts 7, 8. The vacuum joint 2 and joining member 3 are then welding on a joining zone 9. The arced heat of the joining parts 7, 8 is absorbed to the thin members 3, 4 on both faces of the very thin member 1, so the defective welding junction of the very thin member 1 is prevented.
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