B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/38 (2006.01) F01D 25/08 (2006.01)
Patent
CA 2425895
A method is provided for drilling a hole through a metallic workpiece (1) having a thermal barrier coating (3) with a ceramic top coat (2) by laser drilling a counterbore to a depth which extends through the ceramic top coat but not substantially into the metallic workpiece and then laser drilling the hole through the workpiece aligned with the counterbore, the counterbore having a diameter larger than the hole.
L'invention concerne un procédé de perçage d'un trou à travers une pièce à travailler métallique (1) comportant un revêtement d'isolement thermique (3) avec une couche de finition en céramique (3). Ce procédé consiste à percer par laser un contre-alésage à une profondeur allant jusqu'à la couche de finition en céramique, mais sensiblement pas dans la pièce à travailler, puis à percer par laser à travers la pièce à travailler alignée avec le contre-alésage, ce dernier possédant un diamètre supérieur au trou.
Chromalloy Gas Turbine Corporation
Deeth Williams Wall Llp
Turbocombustor Technology Inc.
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