Patent ID: 6607837
Filing Date: 2003-08-19
Classification: B23K,B23Q,Y10T

Abstract:
A structural body, comprising:first and second members welded to each other at an abutted portion of the first and second members, by a friction stir welding, wherein: the abutted portion of the first member and the second member is welded from a side of one face, in a thickness direction, of said first and second members by friction stir welding, providing a welding portion; connected to said welding portion, extending from said first member and said second member, are respective protrusion portions which protrude from said one face; said respective protrusion portions are provided prior to said friction stir welding to said first member and said second member; between an apex of said respective protrusion portions and an extension line of said one face, a face of said welding portion is provided; and said face of said welding portion is concavely curved against said apex of said respective protrusion portions.