Die button with staking features

Details Die button with staking features Die button with staking features

1991-07-11

1992-12-29

Gorski, Joseph M.

Metal working

Means to assemble or disassemble

Means to drive self-piercing work part

29432, 29512, 29243517, 72469, B23P 1900

Patent

active

051740184

ABSTRACT:
An improved die member and method of attaching a self-piercing and riveting fastener to a panel wherein a slug pierced from the panel by the riveting fastener is securely staked in the barrel portion of the fastener during the installation of the fastener. The staking method includes driving a plurality of staking projections into said slug, thereby pinching said slug between the projections and a barrel side wall. This pinching action causes the slug to deform outwardly and lodge between the side walls of said fastener. The staking projections are preferably arranged around the perimeter of the die post, and in a most preferred embodiment, the projections have a canted side wall proximal the wall, forcing a portion of said slug toward the barrel side wall, when said slug is pinched between said canted side wall and a bottom wall of said fastener.

REFERENCES:
patent: 4064617 (1977-12-01), Oaks
patent: 4484385 (1984-11-01), Woods
patent: 4490904 (1985-01-01), Moyher
patent: 4507859 (1985-04-01), Shinjo
patent: 4724610 (1988-02-01), Muller
patent: 4729163 (1988-03-01), Muller et al.
patent: 5072518 (1991-12-01), Scott

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