Laser drilling of non-circular apertures

Forming an aperture in a metal wall, including a diffuser opening up and out from bottom, comprises: (i) machining the wall with a laser beam of pulse rate and power sufficient to vaporise the metal; (ii) firing the laser at an acute angle across the surface at increasing pulse rate so that each bea...

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Bibliographic Details
Main Authors KELLEY, JAMES GEORGE, ROCKSTROH, TODD JAY, CROW, JOHN MAYNARD
Format Patent
LanguageEnglish
French
German
Published 05.12.2001
Edition7
Subjects
AIR INTAKES FOR JET-PROPULSION PLANTS
BLASTING
CLADDING OR PLATING BY SOLDERING OR WELDING
COMBUSTION ENGINES
CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING
GAS-TURBINE PLANTS
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MACHINE TOOLS
MECHANICAL ENGINEERING
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
SOLDERING OR UNSOLDERING
TRANSPORTING
WEAPONS
WELDING
WORKING BY LASER BEAM
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Summary:Forming an aperture in a metal wall, including a diffuser opening up and out from bottom, comprises: (i) machining the wall with a laser beam of pulse rate and power sufficient to vaporise the metal; (ii) firing the laser at an acute angle across the surface at increasing pulse rate so that each beam pulse vaporises the metal at a laser spot and drills continuously the metal wall; and (iii) traversing the laser beam latitudinally and longitudinally at increasing speed so that successive spots overlap in decreasing amounts to etch the metal, forming a continuous trench below surface.
Bibliography:Application Number: EP19970303194