Laboratory for Manufacturing and Sustainability

The derivation and implementation of an algorithm that calculates exit order sequence (EOS) as a planar milling burr prediction tool is presented. EOS expresses the orientation of a cutter relative to the workpiece in terms of the exit order of three points describing the major and minor cutting edges. EOS calculations along the contours of a CAD model are based upon an instantaneous, Cartesian frame of reference centered on the tool spindle axis and oriented in the feed direction. The scheme provides accurate and robust EOS calculations and introduces a “worst-case” approach to select a unique EOS from overlapping tool exit conditions.