Forming roller for corrugated fin

Details Forming roller for corrugated fin Forming roller for corrugated fin

1994-09-08

1996-04-23

Larson, Lowell A.

Metal deforming

By use of 'flying tool' engaging moving work

With cutting

72196, B21D 1500, B21D 1300

Patent

active

055092888

ABSTRACT:
Forming rollers having a tooth tip concave portion at the tip of a tooth tip portion, a tooth bottom convex portion at a bottom of a tooth bottom portion and louver cutter at an oblique line portion between the tooth tip portion and the tooth bottom portion. A radius of an arc-shaped portion of the tooth tip concave portion at front side of rotational direction is set to be larger than a radius of an arc-shaped portion of the tooth tip concave portion at a rear side of the rotational direction. A radius of an apex portion of the tooth tip portion at the front side is set to be smaller than a radius of an apex portion of the tooth tip portion at the rear side and louver cutter at the oblique line portion is formed to have a predetermined interval from the apex portions of tooth tip portion. Therefore, flat folded portions having substantially the same curvature at both shoulder portions thereof horizontal are formed.

REFERENCES:
patent: 3673846 (1972-07-01), Levington et al.
patent: 3850018 (1974-11-01), Drosnin
patent: 3998600 (1976-12-01), Wallis
patent: 4067219 (1978-01-01), Bianchi et al.

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