Modular drawbead structure

Details Modular drawbead structure Modular drawbead structure

1984-09-14

1985-07-30

Gilden, Leon

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72341, 72466, B21D 2200

Patent

active

045313954

ABSTRACT:
Modular male and female drawbead structures comprise wafers of varying thickness which abut each other and are longitudinally wholly or partially aligned relative to each other in respective slots of die binders. The male structure has a body portion including a base wall and side walls which match and are spaced from like walls of a respective slot. A bead portion projects from an outer wall of the body portion and is joined thereby across concave shoulders. The female structure has a body portion including a base wall seating on the matching base wall of a respective slot and side walls which match and are spaced from like walls of a respective slot. A groove portion in the outer wall of the female module interfits with the bead portion and is joined to such outer wall by convex shoulders which match the concave shoulders. The male and female modules are releasably retained in their respective slots by side wall shims of semi-resilient material compressed between the side walls of the modules and the matching side walls of the respective slots. The male module is adjustable inwardly and outwardly of a respective slot by the use of a base wall shim of the same material as the side wall shims. The thickness of such shim controls the adjustment of the male module. In another embodiment, a number of wafers are formed integrally with each other into a module of a pre-determined length. In a third embodiment, a number of wafers are interconnected by flexible strips of semi-resilient material. In a fourth embodiment, folded or pleated metal straps provide the male and female modules. The bead and groove portions of the concave and convex shoulders are formed either on the junctures of such straps or on free edges thereof.

REFERENCES:
patent: 2143442 (1939-01-01), Kellogs
patent: 2285903 (1942-06-01), Clark
patent: 3664172 (1972-05-01), Cvocho

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