METHOD OF MANUFACTURING JOINED BODY, JOINED BODY, AND ALUMINUM HOLLOW MEMBER FOR BATTERY CASE

原文（中国語）

A method of manufacturing a joined body includes a disposition step and a joining step. In the disposition step, the members to be joined are arranged to be in contact with each other. In the joining step, the rotating tool is pressed and is caused to proceed in the joining direction to join the members to be joined by friction stir. A protruding portion is formed on at least one of the members to be joined in parallel to a joining direction. The members to be joined in which the protruding portions are formed are disposed to be pressed by the friction stir welding tool. The protruding portion is disposed to be in contact with a side where the joining direction and the rotation direction of the tool coincide with each other.