Rigid sheet metal rivet button fabrication for convenience-featu

Details Rigid sheet metal rivet button fabrication for convenience-featu Rigid sheet metal rivet button fabrication for convenience-featu

1998-06-24

2000-03-14

Larson, Lowell A.

Metal deforming

Process

Deforming sheet metal

413 12, B21D 5138

Patent

active

060356898

ABSTRACT:
Processing steps and tooling (FIGS. 5-7, 10-13 and 14-16) of the invention enable replacement of prior practice rivet button processes [FIGS. 3(a)-(d)] which progressively decreased unitary rivet button sheet metal thickness gauge so as to preclude use of thinner-gauge sheet metal (about 50 to 70 #/bb) rigid flat-rolled steel due to surface cracking (FIG. 4). Flat-rolled steel and rigid aluminum alloy sheet metal can be selected in new thickness gauges and preferred characteristics for container manufacture through use of the disclosed process [FIGS. 8(a)-(c)], which helps to achieve a major portion of desired rivet button height with only a minor decrease in starting thickness gauge [FIGS. 9(a) and (b)] to enable achieving desired final rivet button height with substantially uniform rivet button sheet metal thickness of greater than seventy-five percent of starting thickness gauge.

REFERENCES:
patent: 3638597 (1972-02-01), Brown

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