Safran Aircraft Engines

Julien Paul Schneider-die-gross

Yann Didier Simon Marchal

Antonin Branteghem

The invention relates to a method for verifying the positioning of a fibrous preform in a blade, the blade having been obtained by injecting a resin into a mould having the shape of a blade and in which a preform has been placed, the blade extending in an orthonormal blade frame of reference X, Y, Z, the blade comprising a blade root extending longitudinally along an axis X, a vane extending from the blade root along an axis Z, the blade having a thickness defined along an axis Y, the preform comprising glass tracers positioned at the surface of the preform, the centre of the tracers defining a neutral axis located at a height along the axis Z in the direction defined by the axis X, the method comprising the following steps: the acquisition (E) of tomographic 2D projections of the blade using an imaging system comprising an X-ray source, each projection being acquired at a given orientation of the X-ray source with respect to the blade; the combining (E, E, E) of the 2D projections in the direction of the axis Y so as to obtain a cumulative 2D image in the directions X and Z; the determining (E), for each pixel column defined in the direction of the axis Z, of a greyscale profile; the processing (E) of each of the profiles obtained so as to locate the position, in Z, of the neutral axis in the direction of the axis X.

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MOISSY CRAMAYEL, France

Julien Paul Schneider-die-gross