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AssigneeToyoda Koki Kabushiki Kaisha
InventorsKazuhiko Sugita, Norio Sakakibara, Nobumitsu Hori, Yoichi Yamakawa, Toshihiro Takahashi
Estimating the term…
An apparatus for machining a non-circular workpiece wherein a tool is moved by a composite movement given by a linear motor and a piezoelectric actuator. The linear motor is driven by the numerical controller in accordance with the low frequency components of profile data defining a position change of the tool with respect to angular position change of the spindle, while the piezoelectric actuator is driven by the numerical controller in accordance with the high frequency components of the profile data. Further, a positioning error of the tool due to reaction force generated by the piezoelectric actuator is detected by the numerical controller to compensate the high frequency components for the detected positioning error.
A method of machining a non-circular workpiece with a machine tool having a rotatable spindle supporting a workpiece, a movable member guided on a base for movement in a moving direction perpendicular to the rotational axis of said spindle, a tool supported at a front end of said movable member for movement in the moving direction, a low speed actuator for moving said movable member in the moving direction with respect to said base, a high speed actuator for moving said tool in the moving direction with respect to said movable member, first command means for generating low frequency command data which indicate low frequency components of profile data defining position change of said tool with respect to angular position change of said spindle, first drive means for driving said low speed actuator in accordance with said low frequency command data, second command means for generating high frequency command data which indicate high frequency components of said profile data, and second drive means for driving said high speed actuator in accordance with said high frequency command data, said method comprising steps of:
An apparatus for machining a non-circular workpiece wherein a spindle supporting a workpiece is rotated at a predetermined speed while a tool is moved back and forth in a moving direction perpendicular to the rotational axis of the spindle in accordance with profile data defining position change of said tool with respect to angular position change of said spindle, comprising:
Dependencies are inferred from the claim text.