FRICTION STIR BONDING METHOD, AND HOLLOW-SHAPED MATERIAL THEREOF

摘要

PURPOSE: A friction stir bonding method of tubular portion such as a hollow-shaped material and the like is provided which does not deform during friction stir bonding. CONSTITUTION: The friction stir bonding method comprises butting an end portion of a face plate on one side of a hollow-shaped material against an end portion of a first plate; and using a rotary tool having a large-diameter portion on either end of a small-diameter portion, rotating and moving said rotary tool along said butted region while interposing said butted region between said two large-diameter portions of said rotary tool. The hollow-shaped material for friction stir bonding is characterized in that said hollow-shaped material comprises a first face plate, a second face plate substantially parallel to said first face plate, and a plural connecting plates connecting said first face plate and said second face plate; an end portion of said first face plate and an end portion of said second face plate is protruded in the width direction of said hollow-shaped material compared to the connecting region of said connecting plate with said first face plate and said second face plate; an end surface of said protruded end portion of said first face plate includes a concave portion or a convex portion; and an end surface of said protruded end portion of said second face plate on the side facing said concave portion or said convex portion includes a concave portion or a convex portion.