Patent ID: 8381555

Claim:
A cutting device comprising: a movable three-axis tool unit comprising: a first actuator for vibrating in a u direction; a second actuator for vibrating in a v direction orthogonal to the u direction; a third actuator for vibrating in a w direction orthogonal to the u direction and to the v direction; a tool holder located at an intersection of the u direction, the v direction, and the w direction; a tool mounted in the tool holder, and protruding from the tool holder in a direction different from the u direction, the v direction, and the w direction, the tool for vibrating to perform vibration cutting on a work material by vibration of the first, second, and third actuators in the u direction, the v direction, and the w direction, respectively; and three sensors for measuring displacements of the first, second, and third actuators, respectively, and for feeding back displacement signals representing the measured displacements; tables located along three orthogonal axes and for moving the three-axis tool unit relative to a work material in three directions along said three orthogonal axes, said three directions each being different from the u direction, the v direction, and the w direction, respectively; and a waveform generating section comprising: three arbitrary waveform generators which are simultaneously controlled and are for generating waveforms for independently vibrating the first, second, and third actuators, an arithmetic section for generating command values representing target values for displacement of the first, second, and third actuators, respectively, an adding section for adding the generated waveform values to the command values, whereby the first, second, and third actuators independently undergo feedback control based on the command values and displacement signals fed back from the three sensors during vibration of the first, second, and third actuators, the first, second, and third actuators for vibrating the tool to perform vibration cutting on a work material.