Electric heating – Metal heating – By arc
Reexamination Certificate
2005-07-05
2005-07-05
Elve, M. Alexandra (Department: 1725)
Electric heating
Metal heating
By arc
C219S121620
Reexamination Certificate
active
06914215
ABSTRACT:
A real time method for quality control testing of a laser shock peening process of production workpieces by analysis of natural frequency shifts during the laser shock peening process. One particular embodiment includes laser shock peening surface of the production workpiece by firing a plurality of laser beam pulses on the surface and forming a plurality of corresponding plasmas, each one of the plasmas pulses having a duration in which the plasma causes a region having deep compressive residual stresses to form beneath the surface, measuring at least one natural frequency of the workpiece for each of the laser beam pulses, calculating natural frequency shifts from a baseline natural frequency for the measured natural frequencies for at least a portion of the laser beam pulses, and using the natural frequency shifts for accepting or rejecting the workpiece with respect to pass or fail criteria.
REFERENCES:
patent: 3850698 (1974-11-01), Mallozzi et al.
patent: 4401477 (1983-08-01), Clauer et al.
patent: 4937421 (1990-06-01), Ortiz, Jr. et al.
patent: 5131957 (1992-07-01), Epstein et al.
patent: 5492447 (1996-02-01), Mannava et al.
patent: 5531570 (1996-07-01), Mannava et al.
patent: 5569018 (1996-10-01), Mannava et al.
patent: 5591009 (1997-01-01), Mannava et al.
patent: 5674328 (1997-10-01), Mannava et al.
patent: 5674329 (1997-10-01), Mannava et al.
patent: 5756965 (1998-05-01), Mannava
patent: 5948293 (1999-09-01), Somers et al.
patent: 5951790 (1999-09-01), Mannava et al.
patent: 5974889 (1999-11-01), Trantow
patent: 5987991 (1999-11-01), Trantow et al.
patent: 5988982 (1999-11-01), Clauer
patent: 6254703 (2001-07-01), Sokol et al.
patent: 6422082 (2002-07-01), Suh
patent: 6462308 (2002-10-01), Lahrman et al.
patent: 6512584 (2003-01-01), O'Loughlin et al.
patent: 6629464 (2003-10-01), Suh et al.
patent: 2003/0042234 (2003-02-01), Suh et al.
patent: 2003/0062349 (2003-04-01), Suh et al.
“Translational (Linear) Vibrations”, Bruel & Kjaer Translational (Linear) Vibration.
“Laser Vibrometry”, Bruel & Kjaer —Laser Vibrometry.
“Low Range Single-point Laser Doppler Vibrometer—Type 8333”, Bruel & Kjaer—Low-range Single-point LDV—Type 8333.
“Scanning Laser”, Bruel & Kjaer, PULSE Analyzers & Solutions, pp. 48 and 49.
Davis Brian Michael
Mannava Seetha Ramaiah
McClain Robert David
Suh Ui Won
Andes William Scott
Elve M. Alexandra
General Electric Company
Rosen Steven J.
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