Method for micro-finish machining of compound, circular arc-shaped profiled surfaces in annular workpieces

In a method for micro-finish machining of circular arc-shaped profiled surfaces in annular workpieces in two phases utilizing an apparatus including:

• means, mounting the workpiece to the apparatus;
• a honing tool;
• means mounting the honing tool for pivotal movement about an axis, which is perpendicular to the longitudinal axis of the mounted workpiece;
• means for displacing the honing tool mounting means and consequently the honing tool in a direction parallel to the longitudinal axis of the mounted workpiece;
• means for pressing the honing tool against the profiled surface to be machined, the improvement in the method comprising the steps of:
• a. engaging the workpiece prior to mounting the same to the workpiece mounting means with measuring instruments and measuring;
• aa. the location of a plane containing a point of predetermined position within the profiled surface with respect to a reference plane;
• bb. the diameter of the annular workpiece;
• b. actuating the means for displacing the honing tool mounting means after the workpiece measured in step (a) has been mounted to the workpiece mounting means for displacing the honing tool mounting means and consequently the honing tool in the parallel direction as a function of the measurement made in step (aa) so that the position of the pivotal axis defined by the honing tool mounting means corresponds to the distance of the plane containing the point of predetermined position from the reference plane;
• c. applying the honing tool to the workpiece by actuating the tool pressing means over a time period, which is determined as a function of the measurement made in step (bb) so that the reduction of the diameter of the workpiece by honing depends on the diameter measured before the honing operation in order to compensate for variations of diameter to reduce their tolerances.