Method for machining a metal component

B - Operations – Transporting – 23 – Q

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B23Q 15/02 (2006.01) B23H 9/10 (2006.01) B23P 15/02 (2006.01)

Patent

CA 2707326

The invention concerns a method for the machining of a metallic structural component, particularly a structural component of a gas turbine, by means of finishing with a pulsed electrochemical ablation process, whereby the structural component features a precontour, to be finished, with different over-measures. The method is characterized by the following processing steps: a) determination of the different over-measures of the precontour, and b) bilateral and simultaneous finishing by means of a simultaneous feed of respectively at least one electrode disposed on different sides of the structural component, whereby the feed velocity of the electrode in the area of the largest over- measure of the pre-contour is higher than the feed velocity in the area of the smaller over- measure of the pre-contour.

L'invention concerne un procédé d'usinage d'un élément en métal, notamment d'un élément d'une turbine à gaz, par enlèvement de métal selon un procédé d'érosion électrochimique par impulsions, l'élément présentant un contour préalable destiné à la finition et doté de différentes dimensions. L'invention est caractérisée par les opérations suivantes: a) déterminer les différentes surépaisseurs du contour préalable et b) procéder à l'enlèvement bilatéral simultané par avancement simultané d'au moins une électrode respective disposée sur différentes faces de l'élément, la vitesse d'avancement de l'électrode dans la zone de la surépaisseur plus importante du contour préalable étant supérieure à la vitesse d'avancement de l'électrode dans la zone de la surépaisseur moins importante du contour préalable.

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