Metal deforming – By use of tool acting during relative rotation between tool... – With cutting of work or product
Patent
1980-05-05
1982-11-30
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
With cutting of work or product
72129, 72166, 72204, 29412, 29415, B21B 500, B21D 1704, B21H 106
Patent
active
043610218
ABSTRACT:
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.
REFERENCES:
patent: 1464318 (1923-08-01), Hauf
patent: 1710930 (1929-04-01), Klaus
patent: 2139682 (1938-12-01), Hothersall
patent: 2247002 (1941-06-01), Rendleman
patent: 2253499 (1941-08-01), Rutenber
patent: 3438111 (1969-04-01), Wilcox
McVay Robert D.
Schaeufele Herman J.
Larson Lowell A.
United McGill Corporation
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