Patent ID: 7601432
Filing Date: 2009-10-13
Classification: B23K,Y10T

Abstract:
1. A group of shape members for friction stir welding, comprising: plural shape members, each shape member, of the plural shape members, having a face plate with a surface and having projections at end portions of the shape member, protruding in a thickness direction of the face plate beyond the surface of the face plate, the plural shape members butted against each other to form plural butt joints to be subjected to friction stir welding, a thickness of a face plate at one end of a shape member, of said plural shape members, at one of the butt joints, being different from a thickness of a face plate at another end of said shape member, at another of the butt joints, wherein a height of the projections, above the face plate surface, at the butt joint where a thickness of the face plate is large, is smaller than a height of the projections, above the face plate surface, where a thickness of the face plate is small.