FRICTION STIR WELDING METHOD, STRUCTURE AND VEHICLE MANUFACTURED BY ASSEMBLING VARIOUS MEMBERS SUCH AS ALUMINUM ALLOY MEMBERS WITH FRICTION STIR WELDING METHOD

摘要

PURPOSE: A friction stir welding method, structures and vehicles are provided to prevent the dent in the joint portion in spite of gap between members in bonding metal members such as aluminum alloy by forming the thick portion protruded for a rotating member in the joint portion. CONSTITUTION: An end of a first extruded frame member(50) is contacted to an end of a second extruded frame member(60). A rotating tool(70) is turned, and moved relatively along the abutting face. The extrusion direction of the second extruded frame member is arranged perpendicularly to the extrusion direction of the first extruded frame member. A protruded part(56) is formed in the end of the first extruded frame member, and the end of the first extruded frame member excluding the protruded part is contacted to the end of the second extruded frame member. Friction stir welding is performed by inserting the rotating tool from the protruded part to the abutting face.