Method of roller spinning cup-shaped metal blanks and roller construction therefor
US4055976A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1976 |
| Grant date | Nov 1, 1977 |
| Priority date | — |
| Expiry date | Mar 29, 1996 |
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 flow forming the metal with an improved metal spinning roller construction. The disc is mounted on rotating die means between headstock and tailstock die forming assemblies of a spinning machine. A first spinning roller pressure shear forms and thins an intermediate annular portion of the disc along a conical surface of the headstock die to form a conical wall of the cup-shaped blank, with an unworked outer annular portion of the disc extending outwardly of the conical wall. A plurality of the improved rollers are moved axially along and parallel with the headstock die means in a single pass. Outer curved front end surfaces of the rollers lay the outer unworked annular portion of the disc along a cylindrical surface of the headstock die form without materially reducing the metal thickness to rough form a cylindrical wall of the cup-shaped blank. This cylindrical cup wall then is immediately thinned and elongated along the cylindrical surface of the headstock die by a first metal deformation zone formed on each of the rollers. The depressed metal…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.