Airfoil last chance screen utilizing EDM and AFM
US12214303B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2022 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Sep 14, 2043 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2260/607
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of manufacturing a last chance screen for an aircraft engine includes forming an array of holes through a metal sheet with a wire electrode using electrical discharge machining. The array of holes comprises a plurality of holes. Each hole of the plurality of holes comprises a first end and a second end and is surrounded by a wall section such that the last chance screen is defined by the plurality of holes and the plurality of wall sections. The first and second end of each hole are widened by either applying a flow of an abrasive flow medium to the array of holes in two directions or using a conical sinker electrode on either side of the metal sheet. Shaping the first and second end of each hole results in an airfoil-shaped cross-section of each wall section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.