Method of and apparatus for forging hollow blank member
US4561274A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Nov 9, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49478
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of and an apparatus for shaping a hollow blank member by a forging operation is provided. The interior of a hollow blank member is filled with a liquid pressure medium which is enclosed therein in sealed condition. An external pressure is applied to the hollow blank member, and the pressure of the pressure medium is maintained as an internal pressure which opposes the external pressure, and part of the pressure medium is discharged externally while applying a desired plastic deformation to the hollow blank member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.