Metal deforming – By deflecting successively-presented portions of work during... – By use of work-contacting wiper and moving – work-holding form
Patent
1992-10-09
1993-07-13
Larson, Lowell A.
Metal deforming
By deflecting successively-presented portions of work during...
By use of work-contacting wiper and moving, work-holding form
72159, 72217, 492 1, 492 40, B21D 700
Patent
active
052263053
ABSTRACT:
Briefly, and in accordance with the foregoing, the present invention comprises a roller assembly for use with a bending apparatus for bending conduit and the like. The bending apparatus includes a frame, a bending shoe associated with the frame and a drive device for controllably driving the bending shoe. The roller assembly provides a roller which pivotably adjusts to an outside surface of the workpiece to accommodate variations in the workpiece while it is being bent during a rolling operation. The roller assembly includes a shaft attached and supported by the frame, two pivot segments and two roller dies. The pivot segments are positioned along and spaced apart on the shaft and each has an arcuate surface in a facing orientation with the other pivot segment. The roller dies have facing ends and base ends and a pivot socket formed in the base end. The pivot socket is sized and dimensioned for cooperatively mating with the arcuate surface of the pivot segment. A pivot bore extends from the facing ends of each of the roller dies through the die to the pivot socket. The pivot bores may be slightly tapered inwardly from the facing ends towards the pivot socket. Each of the roller dies has a concave rolling surface which is formed for receiving an outside surface of a workpiece placed thereagainst during a bending operation. The cooperative arrangement of the tapered pivot bores and the pivot sockets mated with the pivot segments allows the concave rolling surfaces of the roller dies to pivotably adjust to accommodate dimensional variations in the outside surface of a workpiece during a bending operation.
REFERENCES:
patent: 2233292 (1941-02-01), Lewin
patent: 3949584 (1976-04-01), Pearson et al.
patent: 4025749 (1977-05-01), Spurr et al.
patent: 4546632 (1985-10-01), Van Den Kieboom et al.
patent: 5125252 (1992-06-01), Ayres et al.
patent: 5151737 (1992-09-01), Johnson et al.
Greenlee Product Catalog, Copyright 1990.
Adleman Larry G.
Plummer Jeffrey J.
Greenlee Textron Inc.
Larson Lowell A.
McKeon Michael J.
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