Method for manufacturing joined body

Abstract

Provided is a method for manufacturing a joined body by performing friction stir welding on a joined member while using a rotating tool including a stirring pin in which a helical groove is formed, the method comprising, in the following order: an insertion step of inserting the stirring pin into the joined member in a state where the rotating tool is rotated in the same direction as a formation direction of the helical groove; a change step of changing a rotation direction of the rotating tool such that the rotating tool is rotated in an opposite direction to the formation direction of the helical groove; and a joining step of joining the joined member in a state where the rotating tool is rotated in the opposite direction to the formation direction of the helical groove.

Dependencies are inferred from the claim text.