Method for controlling the conformity of the profile of a curved surface of a turbomachine element

A control method of the conformity of a profile of a section of a curved surface of an element of a turbomachine comprising the following steps:

• acquiring coordinates of several measurement points of the section in a frame of reference defined for said section;
• wherein the method comprises the following steps:
• calculating from the coordinates of these measurement points the radius of curvature of the section at each of these points so as to obtain a measured curve of evolution of the radius of curvature according to the position of the measurement points along said section;
• comparing the measured curve of evolution of the radius of curvature obtained at the preceding step to a theoretical curve of evolution of the radius of curvature of the section which is predetermined, with the following steps
• identifying at least one singular point in the measured curve of evolution of the radius of curvature corresponding to a local extremum of said measured curve of evolution;
• counting the number of identified singular points;
• measuring parameters of conformity by comparing the singular points to particular points of the theoretical curve of evolution of the radius of curvature, the measured parameters and the particular points of the theoretical curve of evolution depending on the number of singular points counted at the preceding step;
• evaluating the conformity of the section of the curved surface from the comparison performed at the preceding step by evaluation of the conformity of the section of the curved surface by comparing the parameters to predetermined values.