Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1979-05-09
1981-07-28
Larson, Lowell A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29159R, 228 17, 228173E, B21D 5328, B21K 130, B21H 500
Patent
active
042802644
ABSTRACT:
A circular centrally-apertured precision torch-cut web disk plate is drivingly rotatably supported between two clamp plates; and the leading end of straight rim strip stock, of length requisite for the tooth bearing rim of the gear, is positioned adjacent the web disk edge and is forced by a floating forming roll pair into conformity with the disk edge, and tack welded in the conformed rim length portion to the disk edge. By driving advance or rotation of the disk, the rim strip is drawn under the forming rolls, continuously forming it to the disk edge, to which the strip is continuously welded as formed. A complete rotation of the disk results in the strip conformed to and welded to the disk periphery as a rim flange, with strip ends brought into adjacent and near-abutting relation, said ends being transversely fill-welded together thus to form a gear blank. Thereafter with or without a hub element centrally located and welded in place, the gear blank is machined to finish various areas, and to cut gear teeth in its periphery by known and appropriate means.
Machine structures for drivingly rotating web disks respectively in a vertical or a horizontal plane, and including a floating forming roll carrying head advanceable and retractable by hydraulic cylinder means, are disclosed with simultaneous welding of both sides of the web disk to the rim stock or, in the case of horizontal disposition, welding of a single side, whereafter the partially completed weldment is inverted for a 360.degree. weld applied to the other side.
In the machine, the web disk workpiece is clamped between opposed clamp plates. One clamp plate is rotationally driven and axially fixed. The other plate is hollow and rotatable but axially shiftable for workpiece insertion, clamping and removal. The clamp plates and web disk have a plurality of alignable drive pin-receiving apertures. A centering rod can be fed through the shiftable hollow plate into a preliminary centering engagement with the web disk central aperture if desired before clamping is achieved by hydraulic advance of the shiftable clamp plate. A floating roll-carrying head is advanced and retracted by hydraulic cylinder means.
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Negrich, executrix by Helen
Negrich, Sr., deceased George
Henn Robert Bruce
Larson Lowell A.
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