B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
113/56, 113/66
B21D 51/12 (2006.01) B21D 17/02 (2006.01) B21D 53/28 (2006.01)
Patent
CA 1226174
TOOTH FORMING TOOL WITH TOOTHLESS CLAMPING SECTION FOR SPLINING TUBULAR ELEMENTS Abstract A tool and machine are provided for pressure forming teeth in the periphery of a cylindrical, tubular workpiece such as a power transmission member by rolling. The tool has a working surface which improves the flow characteristics of the metal work piece during the tooth forming operation. Flow char- acteristics are particularly improved during initial contact of the tool with the workpiece by providing an initial toothless clamping section on the tool preceding the first toothed working section. The clamping section minimizes or eliminates radial workpiece separation from the-mandrel ahead of the toothed section during the initial stage of the tooth-forming operation, which separation is manifested as a wave or buckling effect in the workpiece during initial forming and as an out-of-round condition in the final product.
421274
Ex-Cell-O Corporation
Macrae & Co.
LandOfFree
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