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US 4,361,021 AGranted
Method and apparatus for forming angle ring flanges
AssigneeUnited McGill Corporation
InventorsRobert D. McVay, Herman J. Schaeufele
Life of this patent
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AssigneeUnited McGill Corporation
InventorsRobert D. McVay, Herman J. Schaeufele
Estimating the term…
A method and tooling for making angle ring flanges from relatively light gauge sheet metal. The method starts with a flat strip of sheet metal from which two angle ring flanges are formed. The strip is rolled and butt welded into a band, the butt weld is broached on both surfaces at the weld line to the thickness of the sheet metal band. The band is placed in a roll forming machine between a set of two forming rolls which rotate and merge to rotate the band and form it into a ring of channel section with outward facing channel legs at 90.degree. to the channel base. One roll is male and pushes the center half of the band down into the female roll and the outer quarters of the band are forced into the clearance between the male and female forming rolls to form the standing legs or flanges of the finished channel section. The male roll has an annular central groove and the female roll includes a shearing cutter disc which is complementary to the annular groove. When the channel ring is finish formed, the roll sets are merged a further amount and the cutter disc cooperates with the groove in the male roll and shears a narrow ring portion of sheet metal from the channel base resulting in two identical angle ring flanges.
A method of forming angle ring flanges from sheet metal comprising:
A method of forming angle ring flanges from an annular band of sheet metal comprising:
In a roll forming machine for successively roll forming a sheet metal ring channel and outwardly shearing a narrow metal band from the base of the formed channel, a roll set comprising:
For use in combination with a roll forming machine for successively roll forming a sheet metal ring channel and outwardly shearing a narrow metal band from the base of the formed channel, a roll forming set of two rolls adapted to merge during a forming operation comprising a male forming roll and a female forming roll means contoured to finish form a substantially right angled channel with a cylindrical base from a sheet metal annular band, said roll forming set including means to enable a double shearing action against a sheet metal base of a formed channel workpiece to cut a narrow ring of metal from the sheet metal base as the male forming roll merges fully into the female forming roll means, the contours of said male roll and said female roll means enabling a complete roll forming of a finish formed ring channel shape before the rolls are merged to a condition where double shearing action commences.
Dependencies are inferred from the claim text.