Method and apparatus for forming corrugating pipe

Details Method and apparatus for forming corrugating pipe Method and apparatus for forming corrugating pipe

1975-03-06

1976-03-02

Mehr, Milton S.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflector arranged to bend work transversely of...

72 50, B21C 3712, B21D 506

Patent

active

039409651

ABSTRACT:
A corrugated pipe forming apparatus and method in which flat sheet metal is passed through a plurality of first and second opposite roller pairs and deformed into a corrugated sheet. Lateral lips are formed parallel to the edges of the sheet and extend generally perpendicular to the sheet over the full length thereof. A pipe rolling machine helically deforms the corrugated sheet and folds the lip into a mechanical lock seam defining Pittsburgh lock of predetermined dimensions and tolerances. To maintain such dimensions and tolerances the width of the lips is adjusted by simultaneously moving one roll of each set in identical increments towards and away from the other roll of each set to thereby correspondingly change the depth of the corrugations and the width of the lips. The sheet can be moved laterally to maintain the lips of equal width. Corrugating stations of the device are defined by opposed corrugating rollers with the upper rollers held on a first frame and the lower rollers held on a second frame. Each frame includes opposite and rigid sides interconnected by fixed rigid axles. Opposed upper and lower rollers are journaled at their respective ends about each of the respective axles.

REFERENCES:
patent: 726691 (1903-04-01), Johnson
patent: 2282176 (1942-05-01), Fay et al.
patent: 2638143 (1953-05-01), Maust
patent: 2747642 (1956-05-01), Kuettel
patent: 3677047 (1972-07-01), Holyoak et al.
patent: 3750439 (1973-08-01), Pratt

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