Electrode device for electrochemically forming the plates of turbine rotors
Abstract
Abstract An electrode device for electrolytically forming the blades of multi-stage turbine rotors as integral portions of the rotor body comprises a tubular, inwardly and outwardly insulated shank and a generally annular electrode food mounted on the shank and having an inner contour in accordance with the profile of a turbine blade to be formed. The outer contour of the electrode foot is made wider than corresponds to the arcuate blade division of the rotor to be produced so that the electrolytical operations for forming each two adjacent turbine blades overlap between the two blades. The working face of the electrode foot is curved cylindrically in accordance with the blade-foot circle of the rotor to be produced. The inner edge of the annular electrode foot is rounded in accordance with the rounding desired at each blade for where the blade meets the foot circle. The tool electrode affords the complete removal of workpiece material from between the resulting blades and also produces an undistorted cylindrical area along the foot circle between adjacent blades.
Inventors
- 👤 G Stark
- 👤 K Otto
- 👤 R Geissler
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |