Patent ID: 6619534
Filing Date: 2003-09-16
Classification: B23K,B23Q,Y10T

Abstract:
A friction stir welding method, comprising:abutting an end portion of a first extruded frame member and an end portion of a second extruded frame member, to provide an abutted portion; at an end portion of a width direction of said first extruded frame member when said first extruded frame member is viewed from said extruded direction, providing a protrusion portion which protrudes in a thickness direction of said first extruded frame member, wherein, in said abutting, said end portion of said second extruded frame member is abutted to said end portion of a width direction of said first extruded frame member, and wherein, in said protrusion portion, a protrusion chip extends toward a side of said second extruded frame member from an apex of said protrusion portion and overlaps said end portion of said second extruded frame member; and in a condition in which a rotary tool is inserted into said protrusion portion and said abutted portion from a side of said protrusion portion, rotating said rotary tool, and moving relatively said rotary tool along to said abutted portion, to perform said friction stir welding.