Dies for forging and trepanning large diameter couplings and method of forging and trepanning couplings
US4107972A · kind A · utility
3Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Nov 7, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21J13/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A die and cooperating parts for forging and trepanning large diameter couplings and a method of forging and trepanning such couplings. A single die is used with a series of cooperating inserts and a riser in performing all the various steps necessary to forge and trepan the coupling. The same die and riser with appropriate inserts also can be used in forging and trepanning couplings of a range of sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.