Method of grooving superalloys and cutting insert therefor

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 27/04 (2006.01) B23B 27/10 (2006.01) B23B 29/04 (2006.01)

Patent

CA 2744173

A method of grooving a work-piece (24) of superalloy uses a grooving cutting insert (12) at least partially covered with a Cubic Boron Nitride (CBN) layer and having one or more interior ducts (18) formed therein which open out to the insert's rake face (16) at one or more corresponding openings (26). One or more coolant fluid streams, conveyed via these interior ducts (18) at a pressure of no less than 200 bars, are directed upwardly and outwardly toward an interaction area between a cutting edge (14) of the cutting insert (12) and the work-piece (24), to thereby limit lengths of work-piece chips (28) created during the grooving operation. The openings (26) of the cutting insert's interior ducts (18) may be located between 0.5 - 3.0 mm from the insert's cutting edge (14).

L'invention porte sur un procédé de rainurage d'une pièce à travailler (24) de superalliage qui utilise un insert de coupe de rainure (12) au moins partiellement recouvert d'une couche de nitrure de bore cubique (CBN) et ayant un ou plusieurs conduits intérieurs (18) qui sont formés dans celui-ci et qui débouchent dans la face de coupe (16) de l'insert au niveau d'une ou de plusieurs ouvertures correspondantes (26). Un ou plusieurs courants de fluide de refroidissement, transportés par l'intermédiaire de ces conduits intérieurs (18) à une pression non inférieure à 200 bars, sont dirigés vers le haut et vers l'extérieur en direction d'une zone d'interaction entre une arête de coupe (14) de l'insert de coupe (12) et la pièce à travailler (24), pour limiter ainsi les longueurs de copeaux de pièce à travailler (28) créés durant l'opération de rainurage. Les ouvertures (26) des conduits intérieurs (18) de l'insert de coupe peuvent être disposées entre 0,5 et 3,0 mm de l'arête de coupe (14) de l'insert.

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