Patent ID: 6916230

Claim:
Process for the machining by abrasive belt, on a part with an axis of rotation, of a non-cylindrical bearing surface, particularly a cam surface on a camshaft, comprising a machining cycle applying an abrasive belt, using support means along an approximately linear contact zone, parallel to the axis of rotation of the part, against the bearing surface while the part is driven in rotation around its axis of rotation, and running the abrasive belt in its longitudinal direction on the support means during machining, two portions of the same running belt, spaced apart from each other in the longitudinal direction of the belt, using two independent support components, along two contact zones angularly spaced apart around the axis of rotation of the part, being applied against the bearing surface, wherein, the abrasive belt is advanced, between two successive machining cycles, by a length corresponding approximately to the belt run length during each machining cycle, the abrasive belt is deflected between the two support components in the form of a loop distant from the part, and the abrasive belt has a length such that at each machining cycle, the second support component receives and applies a new abrasive belt portion against the bearing surface.