Patent ID: 6698153
Filing Date: 2004-03-02
Classification: B23K,Y10T

Abstract:
A hollow shape member for friction stir welding, comprising:two face plates; a connecting plate for connecting said two face plates, at least one end of which is connected to a position other than an end portion in the width direction of the hollow shape member; either a projection protruding toward or a groove opening toward the outer direction of width of said hollow shape member, provided to the end of a first face plate at said end portion in the width direction of said hollow shape member; and either a projection protruding toward or a groove opening toward the outer direction of width of said hollow shape member, provided to the end of a second face plate at said end portion in the width direction of said hollow shape member, wherein second projections are provided to the end portions of the first and second face plates having said projections or said grooves, respectively, both second projections protruding outward to the thickness direction; and wherein a portion of said projections or said grooves is disposed within the range of protruded height of said second projections, respectively.