Electric heating – Metal heating – By arc
Reexamination Certificate
2004-12-13
2008-08-12
Evans, Geoffrey S (Department: 1793)
Electric heating
Metal heating
By arc
C205S665000, C219S069170
Reexamination Certificate
active
07411150
ABSTRACT:
A composite component (1), such as a turbine airfoil, includes a conductive portion (2), and a non-conductive portion (5), such as a thermal barrier coating or a wear protection coating, or both. In machining the component, a laser machining step is applied for machining the non-conductive portion, and an electro-machining step is applied for machining the conductive portion. The laser machining step is performed by applying preferably a high-frequency pulsed laser. The focussed laser beam working diameter (DL) is essentially smaller than the size of the contour (16) to be machined. The contour is scanned by the laser beam (9) along a pre-defined trace (17) thus literally inscribing the desired contour into the workpiece.
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Lavers Fergus
Sela Uri
ALSTOM Technology Ltd.
Cermak Adam J.
Cermak Kenealy & Vaidya LLP
Evans Geoffrey S
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