B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/174, 113/65
B21D 53/26 (2006.01)
Patent
CA 1064238
ABSTRACT OF THE DISCLOSURE A one-piece tubular walled spun sheet metal pulley having a V-shaped pulley groove formed by a single V-groove wall ant a par- tial double fold V-groove wall. An integral tubular pulley mounting flange wall extends axially from the double flange wall located in- termediate the crests and valley of the V-groove forming walls in cross section. The tubular spun sheet metal V-grooved pulley product is made by drawing from a sheet blank a cup-shaped stage blank having a bottom wall, ant a primary cylindrical flange wall connected by an offsetting shoulder with an enlarged secondary cylindrical flange wall terminating in an open end; then knocking out the bottom wall of the cup-shaped stage blank to form a tubular stage blank having offset primary ant secondary cylindrical flange walls; and then spinning a V-shaped pulley groove in the secondary flange wall of the tubular blank which groove in cross section has a single V- groove wall and a partial double fold V-groove wall conected with the primary cylindrical flange wall intermediate the crests and valley of the V-groove forming walls. The apparatus for spinning a V-groove in the hubless off- sot cylindrical stage blank includes means for supporting the stage blank on its open ends at spaced locations on relatively axially movable headstock ant tailstock die means assemblies; means for in- ternally and externally telescopically supporting a stage blank primary cylindrical flange wall in tailstock tie means during re- lative axial movement between the headstock and tailstock tie means and while spinning a V-groove in the enlarged stage blank secondary cylindrical flange wall; and internally supporting the pulley V- groove walls on headstock and tailstock die means as the V-groove is being spun.
263933
Kark Michael F.
Sproul Nolte V.
LandOfFree
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