Method of and apparatus for forming a reinforced can end

Details Method of and apparatus for forming a reinforced can end Method of and apparatus for forming a reinforced can end

1984-02-14

1986-02-25

Combs, E. Michael

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72354, 413 8, 413 56, B21D 2200, B21D 5144

Patent

active

045719780

ABSTRACT:
The invention herein relates to a method of and apparatus forming a reinforced pressure resistant can end by gripping a central panel of a metallic blank between an axially aligned reform pad and an indent ring, the reform pad being in internal concentric relationship to a draw punch and the indent ring being in internal concentric relationship to a lift ring, the draw punch being movable in a first direction to exert first forces against a peripheral edge portion of the blank in a first direction to form the peripheral edge portion out of the plane of the central panel and shape the blank into a generally flanged cup-shaped configuration defined by the central panel, a radius, a frusto-conical wall and an annular flange, and while the central panel is still gripped, second forces are exerted beyond the first forces and in a second direction opposite the first direction to form at least a part of the metal of the radius, in the absence of restraint or constraint, out of the plane of the central panel and to a side thereof opposite the flange to form an annular reinforcing countersink radius.

REFERENCES:
patent: 2763228 (1956-09-01), Lawson
patent: 3307388 (1967-03-01), Brooks et al.
patent: 3537291 (1970-11-01), Hawkins
patent: 3957005 (1976-05-01), Heffner
patent: 4031837 (1977-06-01), Jordan
patent: 4109599 (1978-08-01), Schulz
patent: 4121448 (1978-10-01), Censuales

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