Patent ID: 8627695
Filing Date: 2014-01-14
Classification: B24C,Y10T

Abstract:
1. A method for ultrasound shot-blasting a metal surface of a turbomachine blade including a foot which is slidably mountable in a dovetailed axial slot of a disk, and a hook which axially retains the turbomachine blade in the dovetailed axial slot of the disk, comprising: placing a plurality of balls in a chamber to shot-blast a hook of the turbomachine blade; and subjecting a vibrating surface of the chamber to ultrasound oscillations by a sonotrode to create a cloud of balls striking the metal surface including the hook of the turbomachine blade which axially retains the turbomachine blade, the metal surface including a groove provided between the hook and the foot of the blade, and a surface portion outside said groove, wherein the cloud of balls is contained in the chamber encompassing said groove and said surface portion outside said groove, and the chamber is defined by first and second walls on two opposite sides, the vibrating surface on one side, and the surface supporting the hook on another side between the first and second walls, and wherein the cloud of balls in the groove shot-blasts an interior of the groove between the hook and the foot of the blade and shot-blasts the surface portion outside said groove.