| 摘要 |
PURPOSE:To improve the working efficiency of welding, and the quality and reliability of a weld zone by allowing the insertion of a base material for welding between end tabs projected to both ends, making the height of the end tabs approximately equal to the thickness of the base metal for welding and making the groove faces of the end tabs approximately flush with the groove face of the base metal for welding. CONSTITUTION:The rear side of a backing strip 31 is fillet-welded and thereafter, the groove face 2a of an iron plate 2 and the slopes 31c of the end tabs 31b are subjected to normal welding to unite the iron plates 1 and 2. The end tabs 31b are removed after the normal welding. The height h1 of the end tabs 31b is made approximately equal to the thickness (t) of the plate 2 or larger than the same. the groove faces 31c of the end tabs 31b are made approximately flush with the groove face 2a of the plate 2 or formed as slopes 31c including a curved surface. An alternative welding method is to provide the end tabs 32b and apron plates 32d to both ends of the backing strip 32 and to make welding in the same manner. The height h2 from the top surface of the body 32a is made approximately equal to the thickness (t) of the plate 2 or higher than the same.
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