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METHOD FOR IMPROVING FATIGUE STRENGTH OF LAP-WELDED JOINT LAP-WELDED JOINT MANUFACTURING METHOD AND LAP-WELDED JOINT
METHOD FOR IMPROVING FATIGUE STRENGTH OF LAP-WELDED JOINT LAP-WELDED JOINT MANUFACTURING METHOD AND LAP-WELDED JOINT
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机译：搭接焊缝疲劳强度的提高方法搭接焊缝制造方法及搭接焊缝
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摘要
The overlap portion 12a of the first steel material 12 and the overlap portion 14a of the second steel material 14 are overlapped, and the edge thereof is also welded by the welding portion 16 extending along the edge of the first steel material 12 The fatigue strength of the overlap welding seam 10 welded to the surface 14b of the additional second steel material 14 is improved by the following method. First, the direction perpendicular to the stretching direction X of the welding portion 16 and parallel to the surface 14b of the second steel material 14 is set as the reference direction Y, and the movement of the overlap welding seam 10 to the reference direction Y is regulated. In addition, the movement of the first steel material 12 and the second steel material 14 in the plate thickness direction is restricted. In this state, a part 14a of the second steel material 14 is heated so that the molten portion 18 is formed in the part 14a of the second steel material 14.
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