Roll forming machine

Details Roll forming machine Roll forming machine

1976-04-26

1977-12-27

Mehr, Milton S.

Metal deforming

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

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

B21D 514

Patent

active

040647277

ABSTRACT:
This disclosure relates to a roll forming machine having a plurality of sequentially-arranged forming units adapted to progressively bend edges of metal sheet into a given shape. The forming units include upper and lower rollers between which the metal sheet is fed and having axes of rotation inclined to one another. Each of the lower rollers includes a bending portion and a holding portion defining a predetermined angle therebetween. The upper roller has two frusto-conical peripheries disposed in confronting relation to the working surfaces of the lower roller and spaced therefrom by a distance corresponding to the thickness of the sheet metal. In order to accommodate sheet metals of different thicknesses, the spacing between the upper and lower rollers may be varied by mounting the upper roller on a swingable mounting means whereby the upper roller is swung along a relatively short arc which approximates a linear path bisecting the angle defined by the working surfaces of the lower roller. The rollers are designed to be "square" for a metal sheet having a thickness at the midpoint of a predetermined range of thicknesses, and there is an approximation of squareness at the end points of the range.

REFERENCES:
patent: 1649613 (1927-11-01), Olson
patent: 1673787 (1928-06-01), Frahm et al.
patent: 2294324 (1942-08-01), Wilkens et al.
patent: 3462989 (1969-08-01), Fischer, Jr.
patent: 3914971 (1975-10-01), Colbath

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