Method and apparatus for performing multiple closed and semi-closed operations on an open die press
US4497194A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1982 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Jun 14, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21J13/085
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for performing multiple operations on a conventional open-die forge press, and includes a rotatable top punch assembly and stationary bottom die assembly. The top punch assembly includes a mounting fixture secured to the press crosshead, a holder plate rotatably mounted on the fixture, a plurality of punches extending downwardly from the holder plate, and motor means for indexing the punches sequentially into forging position over the bottom die assembly. A method is also provided for making valve pots, including upsetting a heated metal block in a split die and punching a hole through the block, the improvement in which during the upsetting step a vertically reciprocable member is extended so as to close a bottom opening in the split die, in order that the split die will function as a closed die, and during the punching step the reciprocable member is retracted so as to allow a punch-core to fall through said opening. This permits faster production rates since less handling of the dies is required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.