Self-piercing rivet setting die and apparatus

Details Self-piercing rivet setting die and apparatus Self-piercing rivet setting die and apparatus

2007-10-23

2007-10-23

Bryant, David P. (Department: 3726)

Metal working

Means to assemble or disassemble

Means to drive self-piercing work part

C029S524100, C029S432200, C029S243530, C072S466500, C411S179000, C411S180000, C411S501000

Reexamination Certificate

active

10909782

ABSTRACT:
A die (18) for use in a self-piercing rivet setting apparatus comprises a cavity (25) for receiving therein a protruded workpiece zone consisting of respective portions of the workpieces (2, 3) to be protrudingly deformed toward the die through the pressure of the self-piercing rivet (1). The cavity has a bottom surface provided with a central raised portion (29) protruding from the center of the bottom surface toward a punch. The central raised portion of the cavity has a vertical angle in the range of 90 to 160 degrees. Preferably, the central raised portion has a top formed in a spherical shape. The cavity has an approximately cylindrical outer wall (27) in the periphery thereof. The cavity has a curved inner surface extending from the top of the central raised portion to the lower end (33) of the outer wall through the bottom (35) of the cavity.

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