Method of making spun V-grooved sheet metal pulleys
US3995474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 1975 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Jul 7, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49458
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a dynamically balanced V-grooved sheet metal pulley from a flat sheet metal disc by roller spinning and splitting tools. The disc is provided with a central hole for mounting the disc on rotating die means between first headstock and tailstock die form assemblies of a spinning machine. The spinning tool presses the disc against an end of a headstock die form and moves generally radially outwardly pressing a portion of the die against the end of the die to provide a circular hub wall. The spinning tool then moves in a series of passes along the headstock die form thereby rolling, forming and ironing the rotating outer metal portions of the disc against the die and forming an axially extending cylindrical side wall terminating in a radially outwardly extending annular flange of a cup-shaped stage blank. The flange then is trimmed to a predetermined length and to form a peripheral axially extending edge on the flange. The cup-shaped blank then is transferred to and clamped between second headstock and tailstock die form assemblies. The clamped cup-shaped blank is rotated and splitting roll means splits the peripheral edge of the annular flange by exerting radial pre…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.