Hemming fixture

Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Movable clamp

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Details

72210, 2924358, B21D 516, B21D 3902

Patent

active

055071651

ABSTRACT:
A device for prehemming at least a portion of an upstanding flange of a sheet metal panel which has a tapered roller which is moved into engagement with the flange while moving the roller along the flange with its axis of rotation disposed in a path which is substantially parallel to the fold line of the flange along the periphery of the panel. The roller is journalled for rotation on an arm pivotally carried by a slide which is moved by a drive cylinder along a lineal path generally parallel to the fold line of the portion of the flange to be prehemmed. As the slide moves linearly the arm is pivoted to move the roller transversely by a follower carried by the arm and received in an elongate cam track having a portion contoured to impart pivotal movement of the arm to cause the roller to follow the desired path of travel substantially parallel to the fold line of the flange for prehemming the flange by bending it to an acute included angle relative to an adjoining portion of the panel.

REFERENCES:
patent: 717224 (1902-12-01), Le Maitre
patent: 2091474 (1937-08-01), Elliott
patent: 3797430 (1974-03-01), Boudreau
patent: 4989308 (1991-02-01), Sanders
patent: 5228190 (1993-07-01), Sawa

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