Snecma

Snecma Services

Safran Aircraft Engines

Gérard Derrien

Sadia Bousquet

Stéphane Kerneis

Claude Leonetti

Carolina Garcia-Lopez

Jean-Jacques Nedelec

Ludovic Gasne

Jacques François Le Saint

Claude André Charles Pagnon

A method of using machining to repair a component workpiece, such as a turbomachine blade, from a known profile of the component, is disclosed. The method includes deforming the profile using a morphing method so that the deformed profile interpolates a cluster of points measured on the component. Deforming the profile involves comparing each zone of the component workpiece that has excess or insufficient thickness with elementary deformation configurations (EDCs) each in the form of a mesh portion and of points, the elementary deformation configurations (EDCs) being filed in a database, the database associating the parameters of the morphing function with each elementary deformation configuration (EDC).

Method of repairing machined components such as turbomachine blades or blades of blisks

A part-holding device in a method for repairing a blade of a monobloc bladed disc of a turbo-machine, through electron-beam welding of a patch onto the blade along a junction plane is disclosed. The device includes a disc supporting device which supports the disc and an adjustable holding device which holds the blade and the patch. The adjustable holding device includes a platen which supports the adjustable holding device, arranged such that the space located above the junction plane allows for an electron beam to pass. The relative positions of the blade and the patch are set using the adjustable holding device that is supported by the platen, while leaving some space allowing for an electron beam to pass. Such a device is simple and reliable.

Part-holding device in a repairing method for a blade of a monobloc bladed disc in a turbo-machine

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Houilles, France

Gérard Derrien