SURFACE FLATNESS CONTROL IN SINGLE PLATE LAPPING

摘要

Flatness of an active surface of the lap has an essential influence on the shape accuracy of lapped surfaces. Profile wear of the tool is not uniform along the radius because of the kinematics of lapping process. Changing the kinematic parameters, e.g. rotational velocity of the lap or position of the conditioning rings together with the workpieces can be used for correcting the profile of an active surface of the lap or for obtaining required convexity or concavity. This paper presents results of a study into the influence of conditioning rings positioning on the wear of the lap as well as the influence of the shape of an active surface of the lap on the flatness of lapped surfaces. Vickers impressions were the bases for measuring the profile wear of the tool and the optical method, based on fringe pattern analysis, was used for measuring the shape of lapped surfaces.