Patent ID: 6378754
Filing Date: 2002-04-30
Classification: B23K,B23Q,Y10T

Abstract:
A friction stir welding method, comprising:abutting a face of an upper side of an end portion of a first member and a face of an upper side of an end portion of a second member, thereby providing an abutted portion where the end portions of the first and second members abut; to said end portion of said first member, providing a protrusion portion which protrudes in an upper portion from said face of said upper side of said first member; carrying out friction stir welding to said protrusion portion and said abutted portion, by inserting a rotary tool into the protrusion portion and the abutted portion from a side of said protrusion portion, rotating said rotary tool and moving relatively said rotary tool along said abutted portion; and in a condition in which said first member and said second member are left as they are, cutting off said protrusion portion.