Method and apparatus for plastic deformation at high ambient pressure
US4085605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1977 |
| Grant date | Apr 25, 1978 |
| Priority date | — |
| Expiry date | Mar 1, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D7/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for plastically de-forming material in a high pressure cylinder, the material being pre-formed into a mandrel billet with an attachment portion and a piston at respective opposite ends thereof and interconnected by an intermediate portion having a smaller cross section than the piston. Holder structure releasably mounted within the high pressure cylinder adjacent the pressure chamber retains the mandrel billet and includes securing means at one end for retaining the attachment portion and engagement means at the other end for slidably engaging the piston. Pressurization of the pressure chamber generates an increase in the pressure medium which acts on the transition surface between the intermediate portion and the piston to cause an elongation of the intermediate portion of the mandrel billet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.