Method and apparatus for forming an end portion of a cylindrical member
US6018972A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a method and apparatus for forming an end portion of a cylindrical member or cylinder. A main shaft is positioned on a plane including the central axis of the cylinder, in parallel therewith. At least one roller is supported on the main shaft to be radially moved to and from the main shaft. The cylinder is held to position the central axis thereof in parallel with the main shaft. Then, at least one of the cylinder and the roller is moved relative to each other, with the central axis of the cylinder held in parallel with the main shaft, while the roller is moved radially toward an eccentric axis offset from the central axis of the cylinder, with the roller being in substantial contact with the outer surface of the one end portion of the cylinder. And, at least one of the cylinder and the roller is driven to be rotated relative to each other about the eccentric axis of the cylinder. As a result, a reduced diameter portion such as a tapered portion having the eccentric axis is formed on the one end portion of the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.