Patent ID: 7359829

Claim:
A method of inspecting a surface profile of the connection zone between the cylindrical portion and the taper of a roller for a turbomachine roller bearing, the surface profile of said roller being geometrically defined by geometrical zones including at least one first zone corresponding to the taper of the roller, by at least one second zone corresponding to the connection zone between the cylindrical portion and the taper of said roller, and by a third zone corresponding to the cylindrical portion of said roller, the method comprising the steps of: in a real space, taking a measurement of the surface profile of the roller; in a theoretical space, determining theoretical straight line segments; on the basis of a calculation of the first derivative of the measured surface profile and the theoretical straight line segments, calculating straight line segments for each of said geometrical zones of the roller, where said straight line segments model the first derivative of the measured surface profile in order to filter out disturbances that are superposed on the measured surface profile; calculating radii of curvature of the surface profile of the roller by taking the first derivative of the straight line segments; and comparing the calculated radii of curvature with predefined threshold values in order to verify continuity thereof.