Electric heating – Metal heating – By arc
Patent
1996-05-15
1997-03-11
Walberg, Teresa J.
Electric heating
Metal heating
By arc
21912178, B23K 2608
Patent
active
056097794
ABSTRACT:
A method for forming an aperture in a component wall made of metal, the aperture having a diffuser which opens up and outward from a bottom of the diffuser to a first surface of the wall, the method includes the following steps: A) laser machining the wall with a laser which produces a laser beam having a pulse rate and power sufficient to vaporize the metal; B) firing and traversing the laser beam, preferably at an acute angle, across the surface to a predetermined first edge of the diffuser in a single pass starting at a centerline of the diffuser; and C) traversing the laser beam at an increasing rate of speed during the pass so that each beam pulse vaporizes the metal at a laser spot such that successive laser spots substantially overlap each other in decreasing amounts and the pulses nibble out the metal to form a continuous trench below the surface.
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Crow John M.
Kelley James G.
Rockstroh Todd J.
General Electric Company
Herkamp Nathan D.
Hess Andrew C.
Mills Gregory L.
Walberg Teresa J.
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