Grit blast drilling of advanced composite perforated sheet
US4612737A · kind A · utility
24Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1985 |
| Grant date | Sep 23, 1986 |
| Priority date | — |
| Expiry date | Jul 5, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/172
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and resulting product produced by attaching a prepared maskant of a desired perforation pattern to cured compound contoured or flat advanced composite materials, directing a narrow stream of highly abrasive grit material of a selected particle size range through a relatively large nozzle under selected high pressure toward the maskant perforations at a very small angle relative to the perforation walls until perforations are formed in the advanced composite material according to the stencil perforation pattern. The perforated sheet produced is particularly adapted for use in sound attenuation structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.