Cold forming dies and cold forming process

Details Cold forming dies and cold forming process Cold forming dies and cold forming process

1989-10-30

1990-08-07

Spruill, Robert L.

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

72344, 72359, B21D 4502, B21K 2110

Patent

active

049457497

ABSTRACT:
Progressive step and compound dies are employed in a cold working process to form a metallic preform of selected mass into a precision-finished, pore-free, annular bushing with a mass substantially equal to that of the preform for use as a battery terminal which allows the fracture free spin over connection of the stem of the bushing to a battery cover and the close fit of the bushing on the battery post when the cover is fitted to the battery casing.

REFERENCES:
patent: 3096579 (1963-07-01), Waller
patent: 3101534 (1963-08-01), Lange
patent: 3186209 (1965-06-01), Friedman
patent: 3280613 (1966-10-01), Schrom
patent: 3835686 (1974-09-01), Lawson
patent: 4166373 (1979-09-01), Braun
patent: 4177665 (1979-12-01), Schurmann
patent: 4291568 (1981-09-01), Stifano
patent: 4352283 (1982-10-01), Bailey
patent: 4416141 (1983-11-01), Nippert
patent: 4422236 (1983-12-01), Ware, Jr. et al.
patent: 4423617 (1984-01-01), Nippert
patent: 4580431 (1986-04-01), Oku et al.
patent: 4776197 (1988-10-01), Scott
European Patent Application No. 0117213; published on Aug. 1984; Inventor: Bostbarge.
U. K. Patent Application No. 2,141,654A, 1985; Inventor: Heminger et al.

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