Citizen Watch Company, Ltd.

Citizen Machinery Co., Ltd.

Toshinari Oyama

Kazuhiko Sannomiya

Hitoshi Matsumoto

Hiroshi Shinohara

Takanori Shinohara

Ayako Kitakaze

Masahiro Muramatsu

Nobuyoshi Imasaki

To provide a machine tool and a control device for the machine tool that can smoothly cut a workpiece while segmenting chips by feeding a cutting tool in a feed direction while reciprocally vibrating the cutting tool along the feed direction on the basis of a condition set by a user. The machine tool () or the control device (C) includes the control section (C) that determines a number of rotations of the relative rotation and a number of vibrations of the reciprocal vibration per rotation of the relative rotation when the workpiece (W) is machined in accordance with a vibration frequency dependent on a period in which an operating instruction can be executed.

Control device for machine tool and machine tool including the control device

To provide a machine tool and a control device for the machine tool that can smoothly cut a workpiece while segmenting chips by feeding a cutting tool in a feed direction while reciprocally vibrating the cutting tool along the feed direction on the basis of a condition set by a user. The machine tool () or the control device (C) includes: a setting unit (C, C) for utilizing a number of rotations of relative rotation of a workpiece (W) and the cutting tool, a number of reciprocal vibrations of the cutting tool per rotation of the relative rotation, and a vibration frequency dependent on a period in which the control device (C) can execute an operating instruction when the workpiece W is machined as parameters and for setting values of two of the parameters to a control section (C); and a correcting unit (C) for setting the remaining one of the parameters to a predetermined value and correcting the values of the two of the parameters set by the setting unit on the basis of the value of the remaining one of the parameters.

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Tokyo, Japan

Toshinari Oyama