Patent ID: 7695248
Filing Date: 2010-04-13
Classification: B22F,B23K,B23P,B33Y,F01D,F05D,Y02P,Y02T

Abstract:
1. A method of making at least one rim situated at the free end of a rotor blade for a gas turbine engine, the method comprising the following steps: a) providing a blade presenting at least one base for a rim at its free end; b) providing a spray nozzle suitable for moving relative to said blade, and a first source of a first powder material, and a second source of a second powder material, said first source and said second source being connected to the spray nozzle; c) providing a laser source connected to an optical head suitable for moving relative to said blade in order to focus the laser beam on a point of the surface of said base for a rim; d) aiming the optical head and the nozzle on a common point of the surface of the top of the base for the rim; e) activating the laser source and the sources of powder material so as to form a localized melt in the vicinity of said point, into which the powder material is injected, thereby forming a localized region of extra thickness; f) aiming the optical head and the nozzle on another point of the surface of the top of the base adjacent to said localized region of extra thickness and returning to step e) until a layer has been formed over substantially the entire width of the top of the base; and g) building at least a portion of said rim by depositing successive layers on the top of the base, each layer resulting from performing steps d) to f) and the following sub-steps: