Method and apparatus for making hubless V-grooved pulley and product
US4023250A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Aug 4, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4946
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A one-piece tubular walled spun sheet metal pulley having a V-shaped pulley groove formed by a single V-groove wall and a partial double fold V-groove wall. An integral tubular pulley mounting flange wall extends axially from the double flange wall located intermediate 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, and 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 and 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 connected 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 offset cylindrical stage blank includes means for su…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.