Patent ID: 8283601

Claim:
A bonding apparatus of metal plates, comprising: metal plates that are overlapped each other; a metal tape used for bonding the overlapped metal plates, and material thereof being the same as material of the metal plates; a metal tape transfer unit for supplying and withdrawing the metal tape; a rivet member punched from the metal tape and heated; an upper mold for clamping the metal tape by an elastic force of a coil spring that is mounted on an upper portion thereof, the upper mold guiding a punch and used as a first electrode; a middle mold for clamping the overlapped metal plates and punching the metal tape in order to make the rivet member, the middle mold guiding the rivet member and the punch, and used as a second electrode; a lower mold for supporting the overlapped metal plates, the lower mold being used as an extrusion die for extruding the metal plates by the rivet member, a shaving mold for shaving excess metal during extrusion, and a third electrode; and the punch for making the rivet member by punching the metal tape, the punch press-fitting the rivet member to the overlapped metal plates by applying a load to the rivet member.