Metal deforming – By deflecting successively-presented portions of work during... – With cutting of work or product
Patent
1981-06-29
1983-05-24
Combs, Ervin M.
Metal deforming
By deflecting successively-presented portions of work during...
With cutting of work or product
72149, 72217, 140 88, B21D 905, B21F 3700
Patent
active
043844677
ABSTRACT:
A method and apparatus for forming rings that is particularly suited for forming plow rings from elongated lengths of stock having irregular cross sectional shape. A length of stock (12) is positioned against a mandrel (20), the end of the stock being pre-bent from a previous bending operation, with the free end of the stock extending beyond the mandrel. A movable bending element (24) is brought into contact with the stock opposite the point of contact with the mandrel, and advanced around the mandrel partially bending the stock. A clamp (82) clamps the partially bent stock against the mandrel and a cutter (98) then cuts the stock, leaving a partial bend in the newly formed free end of the stock, the cut portion of stock being clamped to the mandrel. The length of stock is moved away from the mandrel so that the bending of the cut portion around the mandrel can be completed.
REFERENCES:
patent: 3580030 (1971-05-01), Bean et al.
patent: 3661002 (1972-05-01), Peddinghaus
patent: 4132106 (1979-01-01), Bihler
Combs Ervin M.
Raymond International Builders, Inc.
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