Method and apparatus for machining a groove around a tubular member
US4648294A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 7, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Aug 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2522
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Machine for machining a groove round the external periphery of the base of a nozzle and notably enabling the back of a weld to be reworked from the outside when a nozzle is being installed on a nuclear reactor vessel. The machine comprises a cylindrical drum (5) in two parts (41, 45) equipped with locking and position-holding shoes (6), a machining head driven in rotation by means of a gear ring (9) and a pinion (17). The cylindrical drum (5, 41, 45) is locked and held in position with respect to the nozzle (1) by means of an intermediate coupling ring (23) secured by screws (31) to the nozzle (1) and by the locking shoes (6) fixed to hydraulic rams (47).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.