Patent ID: 6599641
Filing Date: 2003-07-29
Classification: B23K,Y10T

Abstract:
A structure body, characterized in thatthe structure body comprises a first member having two sheet face plates and one of said two sheet face plates and another of said two sheet face plates being connected by a rib, a second member joined to the first member, with the joining being carried out according to a friction stir welding to a connection portion of said one of said two sheet face plates of said first member and said rib; at least one visible outline lines of a connection portion of said rib and a respective one of said two sheet face plates is comprised of a curved line which is recessed in a solid side of said first member: said curved line is constituted by a combination of two continuous circular arcs; and within said two circular arcs, a diameter of said circular arc of a side of said face plate is smaller than a diameter of said circular arc of a side of said rib.