METHOD OF CONNECTING METAL MATERIAL

摘要

A method of connecting metal materials to each other, wherein a pin fitted to the tip of a metal bar-like rotating tool (10) is inserted between the end part of a metal member (1) and the end part of a metal member (1'), and moved, while rotating, along the longitudinal direction of these end parts. By this, frictional heat is generated between the metal members (1) and (1') and the rotating tool (10), and the metal member (1) is connected to the metal member (1'). The rotating tool (10) is formed of a wide shoulder (12) and a thin pin (11) formed at the tip thereof and inserted between the end parts of the metal members. The pin (11) is a right circular cylindrical pin. The side face of the pin (11) is formed in a smooth curved surface, and a thread groove is not formed therein.