Method of roller spinning cup-shaped metal blanks
US3991598A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1975 |
| Grant date | Nov 16, 1976 |
| Priority date | — |
| Expiry date | Jun 6, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4946
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of making a dynamically balanced cup-shaped blank for use in the production of a V-grooved pulley, from a flat sheet metal disc by a roller spinning tool. The disc is provided with a central hole for mounting the disc on rotating die means between 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 disc against the end of the die form to provide a bottom wall of the desired cup-shaped blank. The spinning tool then moves in a series of passes along the headstock die form thereby rolling, forming and ironing rotating outer metal portions of the disc against the die, and forming the disc with an annular reversely angled conical flange and an axially extending cylindrical side wall which terminates in an open end. The die form and spinning tool also form a reentrant corner in the disc blank which connects the conical flange with the cylindrical wall and which is defined by an acute angle with the cylindrical side wall. The conical flange ultimately forms a portion of one of the flanges of a V-groove in a finished pulley subse…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.