抄録
Compared to a conventional serial kinematic machine tool, a parallel kinematic machine tool has advantages for high speed and multi-degrees of freedom positioning. However, it is difficult to achieve high speed cutting because of its relatively complex structures. In order to achieve high speed cutting on a parallel kinematic machine tool, it is important to optimize the tool path and the workpiece position. In this study, the strut motion controlling a spindle unit is simulated while cutting. And external forces, which are gravity, friction and inertia forces, acting each strut are estimated by solving the kinematic model. The tool posture, the feed direction of ball-end milling and the workpiece setup position are evaluated based on the estimated external forces. It is confirmed that the variation of servo motor load can be reduced during a cutting operation on a parallel kinematic machine tool.
