Patent ID: 6910263

Claim:
A self-piercing rivet setting apparatus comprising a punch and a die for driving a self-piercing rivet into a plurality of workpieces including a receiving-side workpiece adjacent to the die, the self-piercing rivet having a large-diameter head and a hollowed leg extending from the head, wherein when the self-piercing rivet is driven into the workpieces, the leg is driven to pierce the workpieces while allowing the front end of the leg to be expanded and deformed in its radial outward direction and to be stayed in the receiving-side workpiece adjacent to the die without passing therethrough to connect the plurality of workpieces with each other by the expanded leg and the head; and wherein the die includes a first die member having a first cavity, and a second die member having a second cavity and a protruding pin provided at the center of the second cavity, the first cavity being adapted to allow the leg of the self-piercing rivet to be driven into the workpieces in a straight direction when the self-piercing rivet is pressed against the first die member by the punch, and the second cavity and protruding pin of the second die member being adapted to allow the leg of the self-piercing rivet being piercing the workpieces to be expanded and deformed in its radial outward direction.