Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1986-10-30
1987-12-29
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
72336, B21D 5144
Patent
active
047152087
ABSTRACT:
A method of forming a container end panel having a countersink radius and a chuckwall including preforming the radius and the chuckwall so that the chuckwall includes a straight wall portion tangent to the radius and reforming and reducing the radius without tooling restraint while holding pressure against the straight wall area. Apparatus for performing the method includes a punch core and a cooperating die core ring having complimental geometry for forming the chuckwall and radius configuration. The article formed by the method and apparatus includes an end panel having a straight wall portion between the normal tapered wall portion and countersink radius.
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Bulso, Jr. Joseph D.
McClung James A.
Larson Lowell A.
Redicon Corporation
Taylor Reese
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