| 摘要 |
The present invention obtains high dimensional precision and secures flatness between members. The method for joining, which concatenates, welds, and joins along a planar direction a first member and second member formed into a hollow planar shape and having a plate section at both surfaces, is characterized by being provided with: an abutment step for abutting the end section (tip of a ridge (37)) of the second member (adjacent floor section (30)) to the bottom of a concave section (concave groove (38) formed at the end of the first member (floor section (30)); and a welding step for welding together the plate sections of one of the both surfaces, and then welding together the plate sections of the other surface. One of the plate sections is a thin plate section (bottom plate section (34)), and the other plate section is a thick plate section (top plate section (33)) that is thicker than the thin plate section (bottom plate section (34)), and preferably in the welding step, after welding the thin plate sections (bottom plate sections (34)) together, the thick plate sections (top plate sections (33)) are welded together. |
