Tie shaft for gas turbine engine and flow forming method for manufacturing same
US9291057B2 · kind B2 · utility
2Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2012 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Apr 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49234
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for manufacturing a tie shaft for aero or land based gas turbine engine. The method includes flow forming a tie shaft preform to produce a tie shaft. In one example, the tie shaft includes a nickel alloy cylindrical wall having a length to diameter ratio of at least 6:1, wherein the diameter is an average outer diameter. The wall includes a minimum effective strain of 0.3 in/in (7.6 mm/mm), and a grain size is in the range of G4 to G16 per ASTM E112. The wall includes a roll formed threaded surface having a thread roughness of less than 1260 μin (32 microns).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.