HIGH DENSITY HEAT SOURCE WELDING METHOD

摘要

PURPOSE:To improve welding efficiency and to prevent shrinkage cracks by providing heat receiving parts having relatively large surface roughness on joining corner parts between a plate and an erected member. CONSTITUTION:The surface 14a of at least one heat receiving part 14 of the hoining corner parts 13' and 13'' of the erected member 12 to abut on the plate 11 is formed into relatively large surface roughness. The thickness and width t1 of the overhang shape in the cross direction of the heat reciving part 14 are selected to 1/4 from the same as the thickness of the erected member 12. Consequently, the surface reflection of the heat receiving part 14 of a beam of a high density heat source is reduced and incident density to the joining part is high and even if an incident angle alpha is somewhat changed, it is allowable and since the heat receiving part functions as reinforcement of weld, the shrinkage cracks can be prevented.