Method and apparatus for milling thermal barrier coated metals

B - Operations – Transporting – 23 – C

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B23C 3/00 (2006.01) B23B 35/00 (2006.01) B23B 41/00 (2006.01) B23H 5/04 (2006.01) B23H 9/10 (2006.01) B23Q 5/20 (2006.01) B23Q 15/013 (2006.01)

Patent

CA 2631361

A method is provided for milling a thermal barrier coated metal part. This method includes selectively removing a portion of a ceramic coating using a mechanical cutting tool, thereby forming a counterbore, and machining the metal part through the counterbore. A drilling head for drilling thermal barrier coated metal parts is also provided. The drilling head comprises a mechanical cutting tool, which is operable to mill through ceramic, and an electrode for electrical discharge machining. The electrode may be used to mill the metal part, and may be interchangeable with the mechanical cutting tool.

Cette méthode permet de fraiser une pièce métallique revêtue de barrière thermique. Cette méthode comprend la suppression sélective d'une partie d'un revêtement de céramique au moyen d'un outil de coupe mécanique, ce qui forme un réalésage, et à usiner la pièce métallique au moyen du réalésage. Est aussi fournie une tête de perçage pour percer les pièces métalliques revêtues de barrière thermique. La tête de perçage comprend un outil de coupe mécanique, pour fraiser la céramique, et une électrode pour l'usinage à décharges électriques. L'électrode peut servir à fraiser la pièce métallique, et est interchangeable avec l'outil de coupe mécanique.

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