Extended cutting form compensation

The existing approach of a geometrical approximation of the cutting tool edge by a simple radius is insufficient for the increasing demands of manufacturing accuracy. Deviations of the present cutting form from the ideal form of radius lead to geometrical errors in the work piece. Existing methods of control-implemented methods for the compensation of the cutting edge radius encounter their limits. A solution for the capture and control based compensation of deterioration-contingent geometric errors on tool edges is described. The current shape of the cutting edge is captured by optical measurement and serves as input for the new developed compensation algorithms. The requirement specification for the new high-resolution optical system was developed on the basis of the experience gained within a previous project. The previous project Machine vision for tool setting used an optical system with the telecentric lens (scale 1:2.5, Resolution 25 urn, Aperture 25mm, Distance of observatio 300 mm) Due to specific designed algorithms it guaranteed a precision of 7 micro meter for the measurement of tool offset and tool radius in a machine tool. This optical system is not directly scalable by a factor of 1/20 because of completely different optical properties in the submicrometer range.