May 23, 2012
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Transcript of May 23, 2012
May 23, 2012
New Aerospace Technologies from EWI
Brian BishopBusiness Development Manager – [email protected]
Update on LPS Activities
Advances in Laser Paint Stripping
Stan Ream Laser Technology [email protected]
Another way to scan a beam- polygon scanner by EWI and CWA -
Up to 50 m/s scan speed All reflective optics One moving part Constant scan velocity across scan width
Constant velocity across scan width
EWI Scanner, Patent Pending
Rotating Polygonal Mirror
Laser Beam Source
Polygon “Beta” Scanner- “COTS” availability from WTT -
More robust Contamination resistant
Servo Drive
Protective “door”
Water cooling
Single body component
Patent Pending
Why the polygon scanner works
Scan speed reduces flame height Reduced flame height reduces beam interference Reduced flame height improves effluent removal Reduced flame height supports cleaner combustion Reduced flame height permits better vision
High speed video (approximately 300X ) with diode laser illumination
Need for process control- more important for shorter wavelength -
Paint thickness is not constant Undocumented paint layers may exist Overlap between passes cannot be assured
System Considerations
LPS of component parts can be relatively simple Many off-aircraft components are candidates
White, Commercial Aircraft?- fiber lasers not a productive option -
Repositionable robot platform for CO2 laser Technically feasible but not an attractive solution
LaserChillerExhaustFiltrationControls
Mobile CO2 LPS Platform?- we’ll never know if we don’t ask -
Large mobile platforms are commercially available Many questions about laser tolerance to motion
Image from SwRI
Literally “out of the box” concept- CO2 laser pitch-catch system -
CO2 beam guided and “guarded” by multiple safety beams
Yeah, probably too far out for aircraft
Summary Novel brazing approach developed for silicon carbide joining
Material has a low neutron cross section and is stable at temperatures >1200C
Forms unique composite microstructure
Preliminary reactor testing at OSURR, a fast fluence (E> 0.1 MeV) of 1E18 n/cm2, or 1E22 n/m2
EWI process does not require high pressure ─ Other approaches for SiC brazing require high pressures of 30-40 MPa
or more; fuel clad tubes are only 1cm in diameter and have thin wall thickness
─ This provides key advantage in manufacturability to other competitor processes
Patent Pending: Provisional Application #61/538,409 “Method for Joining Ceramic Bodies to One Another”
Questions
Brian BishopBusiness Development Manager –
Aerospace614-270-7052