Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1978-05-30
1980-01-29
Keenan, Michael J.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72320, B21D 504, B21D 3708
Patent
active
041854870
ABSTRACT:
A cleat-former machine, of the type which utilizes two rotating wipers, permits removal of formed cleats sideward from either end of the bending blade, and can be used with workpieces whose length exceeds that of the wipers. L-shaped side plates, which support between them a bending blade and a wiper arm mechanism adjacent the aft bending edge of the bending blade, have cutouts provided in their upper edges in registration with the ends of the bending edge. A rocker-arm clamping assembly, rotatably mounted on a shaft above and aft of the bending blade, is rotated to clamp and unclamp a sheet metal workpiece relative to the blade by a tilt lever outward of the side plate, aft of the cutout, at their level, and operated off the aft side of a circular cam supported outward of said side plate and rotated by the gear train. Side access to the ends of the blade bending edge is thereby provided. In the method of the present invention, especially useful in fabricating L-shaped duct workpieces, 180.degree. cleats may be formed on the opposite edges of one panel only of a flat workpiece notched to define two panels by aligning the notch with the side edge of the wiper arm mechanism, with the panel not to be cleated projecting outward. A 180.degree. cleat longer than the length of the wiping arm mechanism may be formed by making slits to divide the workpiece edge into separate portions of no greater length than the wiper arm mechanism length and cleating successive portions individually while the yet uncleated portions project outward.
REFERENCES:
patent: 2973796 (1961-03-01), Engel et al.
patent: 3731514 (1973-05-01), Deibele, Jr.
patent: 3994152 (1976-11-01), Wolters
patent: 4014200 (1977-03-01), Wolters
Engel Industries, Inc
Keenan Michael J.
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