Method and manufacturing a hollow turbomachine blade
US5826332A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49895
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a hollow machine blade consisting of two skins ining an internal cavity and interconnected by stiffeners comprises: PA1 forging and machining the primary components of the blade, including forming a reserve of material in localized regions of the inner faces of the skins, trunnion forming elements at the ends of the components, and locating holes in the components; PA1 deposition of diffusion barriers involving application of a mask, cutting the mask to a predetermined pattern using a special-purpose tool, peeling away portions of the mask, deposition of a coating product, peeling away the remainder of the mask, prefiring treatment, cleaning and checking; PA1 assembly of the primary components followed by isostatic-pressure diffusion welding; and PA1 subjecting the assembly to inflation under gas pressure and superplastic forming in a mould in order to shape the skins and form the interconnecting stiffeners, including the steps of cold-debonding the primary components, causing flow of the material reserved in the overthickness around the blade cavity, and extraction of the blade from the mould by way of mechanical means placing the blade under constraint a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.