| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method which enables the formation of inexpensive high-quality T-type joint by using ark welding method and plasma welding method which are conventional and inexpensive for welding equipment. SOLUTION: In the method for manufacturing the T-type joint, an end surface of a second plate 14 is abutted at a predetermined angle to the rear side of a first plate 12, and ark welding or plasma welding is performed from the surface side of the first plate 12. Thereby, the heat of ark welding or plasma welding penetrates through the first plate 12 and melts an end surface portion of the second plate, and a T-type welded joint is formed by depositing a molten portion. In ark or plasma welding, a deep penetration method is applied by case according to a thickness of the first plate. Also, thickness-reduction working is performed on the surface of the plate when plate thickness exceeds a penetration depth. COPYRIGHT: (C)2010,JPO&INPIT
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