Laser drilling of components

Details Laser drilling of components Laser drilling of components

1991-02-25

1992-01-21

Albritton, C. L.

Electric heating

Metal heating

By arc

2191217, 21912184, B23K 2600

Patent

active

050830066

ABSTRACT:
In the laser drilling of gas turbine engine blades there is provided a method of maintaining constant the distance between a laser nozzle and the surface to be drilled by measuring the topography of the surface and using that data to control the focusing of the laser beam onto the surface. The topography is measured by determining the back pressure of a stream of oxygen blown through the nozzle onto the surface, and relating the back pressure to the distance between the nozzle and the surface. The distance measured is used to control a servo operated table so as to move the surface to the optimum distance from the nozzle.

REFERENCES:
patent: 5026964 (1991-06-01), Somers et al.

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