Hydrostatically deforming a hollow body
US5279142A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1992 |
| Grant date | Jan 18, 1994 |
| Priority date | — |
| Expiry date | Sep 23, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D26/045
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus for pressure deforming a hollow workpiece having a tubular end portion has a die formed with a cavity adapted to receive the workpiece with the end portion of the workpiece projecting out of the die and a fitting movable along an axis toward and away from the die and formed with a seat sealingly engageable in a feed position over the projecting end portion of the workpiece. An annular self-tightening gland in the seat circumferentially engages in the feed position around the projecting end portion of the workpiece. A passage opening in the seat into the hollow workpiece when the fitting is engaged over the projecting end portion serves for pressurizing an interior of the workpiece and thereby deforming it outward against an inner surface of the die and for pressing the gland radially tightly against the workpiece and against the fitting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.