Cutter Workpiece Engagement Model for Five-axis Flank Milling
In five-axis flank milling,the time-varying cutter attitude makes the cutter workpiece engagement complex and changeable during the machining process.The extraction of the cutter workpiece engagement is crucial for studying cut-ting forces,machining errors and chatter stability in multi-axis milling.An analytical method for extracting the instantane-ous contact profile without the need of surface to be machined information is proposed for five-axis flank milling of complex surfaces.The cutter is represented by a series of discrete cutting microelements.According to the cutter location and milling parameters,the feature point sets of each cutting microelement are obtained and fitted with spline curves.The instantaneous contact profile is obtained by screening the entry/exit points of all the cutting elements based on the constraints of distance and feed direction and simultaneously representing them in the workpiece coordinate system.The simulation and experiment results show that the maximum entry/exit angle error is within 3％,and the calculation efficiency is about 9.5 times that of the solid modeling method,which proves the accuracy and efficiency of this method.
five-axis flank millingcutter workpiece engagementcutter locationmilling parametersurface to be ma-chined
万方数据
维普
