Tool Path Optimization of Pocket Corner

In milling around sharp corners, residual materials are left at sharp corners when the stepover is extremely long in the contour-parallel tool path. Milling force at the sharp corner rises momentarily due to the in crease of the cutter contact length, thus shortening the tool life and leading to machine chatter, even cutter breakage. Then a tool path improvement method by inserting biarc transition segments in the contour parallel tool path s proposed for milling the pocket. Using the method, the cotter moves along the biarc transition tool path. And the corner material is removed. The improved tool path is continuous fur clearing residual materials at the sharp corner. Finally, the machining experiment validates the proposed method.