Machining, Measurement, and Control Laboratory

Optimization Design of Cutting Process for minimizing Workpiece Displacement at Cutting Point
Yusuke Koike, Atsushi Matsubara, Iwao Yamaji, Shinji Nishiwaki, Kazuhiro Izui

Vibrations of a tool or a workpiece in cutting shorten tool life and deteriorate a surface roughness. In this research, we propose a method to reduce vibrations of the workpiece at a cutting point. An algorithm that generates a cutting path to minimize workpiece displacements without reducing material removal rate is developed. The cutting path is generated by considering workpiece stiffness matrices, cutting force vectors and feed directions. In this algorithm, an anisotropy analysis of workpiece stiffness matrices is mainly conducted and the direction that maximizes the stiffness is calculated at every cutting point. A feed direction at a cutting point is changed to align a cutting force vector to the highest stiffness direction.