A grinder selection device includes: an input unit that inputs a grinding condition for a workpiece as a grinding target of grinding machining including at least the geometry of the workpiece and vibration data indicating vibration of a grinding machine, and grinder information about one or more grinders as grinder candidates to be used for the grinding machining; a learned model acquired through supervised learning using training data containing input data and label data, the input data containing an arbitrary grinding condition for a workpiece as a grinding target of grinding machining by an arbitrary grinding machine including at least the geometry of the workpiece and vibration data indicating vibration of the grinding machine, and grinder information about an arbitrary grinder, the label data being data indicating the adequacy or inadequacy of a combination between the grinding condition and the grinder information about the grinder; and a judgment unit.

A grinder selection device includes: an input unit that inputs a grinding condition for a workpiece as a grinding target of grinding machining including at least the geometry of the workpiece and vibration data indicating vibration of a grinding machine, and grinder information about one or more grinders as grinder candidates to be used for the grinding machining; a learned model acquired through supervised learning using training data containing input data and label data, the input data containing an arbitrary grinding condition for a workpiece as a grinding target of grinding machining by an arbitrary grinding machine including at least the geometry of the workpiece and vibration data indicating vibration of the grinding machine, and grinder information about an arbitrary grinder, the label data being data indicating the adequacy or inadequacy of a combination between the grinding condition and the grinder information about the grinder; and a judgment unit.

A machining device includes: a positional deviation detection unit configured to calculate a correction value for correcting a positional deviation between an ideal contour line and an actual contour line in each of a plurality of angular directions based on a center of a hemispherical shape of a tool; a distance effect coefficient calculation unit configured to calculate a first distance effect coefficient indicating a degree of influence of the positional deviation when machining a second machining point, according to a distance between the tool and the second machining point in a case where a machining point machined by the tool transitions from one-point machining including a first machining point in the workpiece to two-point machining including the first machining point and the second machining point; and a positional deviation correction unit configured to correct the positional deviation of the tool.

A machining device includes: a positional deviation detection unit configured to calculate a correction value for correcting a positional deviation between an ideal contour line and an actual contour line in each of a plurality of angular directions based on a center of a hemispherical shape of a tool; a distance effect coefficient calculation unit configured to calculate a first distance effect coefficient indicating a degree of influence of the positional deviation when machining a second machining point, according to a distance between the tool and the second machining point in a case where a machining point machined by the tool transitions from one-point machining including a first machining point in the workpiece to two-point machining including the first machining point and the second machining point; and a positional deviation correction unit configured to correct the positional deviation of the tool.

A method for determining an abnormal processing of a processing machine is disclosed, and includes: obtaining an acceleration signal corresponding to an acceleration of a tool tip from an accelerometer arranged on a tool-end of the processing machine; performing an integral process to the acceleration signal to generate a movement information; obtaining a motor position information of a motor used to bring the tool-end to move; respectively performing a coordinate alignment process to the movement information and the motor-position information to generate a transformed movement information and a position vector respectively being described based on a workpiece-end coordinates system used by a workpiece-end of the processing machine; combining the transformed movement information and the position vector to generate a relative movement value between the tool tip and the workpiece-end; and, determining whether an abnormal processing occurs based on the relative movement value.

A method for determining an abnormal processing of a processing machine is disclosed, and includes: obtaining an acceleration signal corresponding to an acceleration of a tool tip from an accelerometer arranged on a tool-end of the processing machine; performing an integral process to the acceleration signal to generate a movement information; obtaining a motor position information of a motor used to bring the tool-end to move; respectively performing a coordinate alignment process to the movement information and the motor-position information to generate a transformed movement information and a position vector respectively being described based on a workpiece-end coordinates system used by a workpiece-end of the processing machine; combining the transformed movement information and the position vector to generate a relative movement value between the tool tip and the workpiece-end; and, determining whether an abnormal processing occurs based on the relative movement value.

A method is described of machining a workpiece which is clamped in a fixturing element and is processed by a tool movably mounted on a CNC machine tool.

The fixturing element is integrally constrained to a frame of the CNC machine tool, then an optical scan of a geometry present in a portion of the workpiece is carried out. From digital data obtained during the optical scan, a coordinate of the geometry is determined in a reference system integral with the frame; and digital data, in particular coordinates, relating to a predetermined sequence of machining operations are processed to generate machining coordinates in the reference system integral with the frame for an actuator of the tool, said machining coordinates being such that the tool applies the pre-established sequence of machining operations on the workpiece at said coordinate.

A method is described of machining a workpiece which is clamped in a fixturing element and is processed by a tool movably mounted on a CNC machine tool.

The fixturing element is integrally constrained to a frame of the CNC machine tool, then an optical scan of a geometry present in a portion of the workpiece is carried out. From digital data obtained during the optical scan, a coordinate of the geometry is determined in a reference system integral with the frame; and digital data, in particular coordinates, relating to a predetermined sequence of machining operations are processed to generate machining coordinates in the reference system integral with the frame for an actuator of the tool, said machining coordinates being such that the tool applies the pre-established sequence of machining operations on the workpiece at said coordinate.

A machine tool includes a turret including first and second stations, a tool storage unit capable of storing tools therein, a machining control unit for controlling a tool in accordance with a machining program, a tool changing unit for replacing the tool attached to the turret with a tool stored in the tool storage unit, and a tool pattern memory for memorizing, as a first tool pattern, a combination of tools at the first and second stations which is associated with a first part of the machining program and, as a second tool pattern, a combination of tools at the first and second stations which is associated with a second part of the machining program after the first part. When machining is stopped during execution of the second part, the tool changing unit changes tools in accordance with a past tool pattern saved in association with a part before stop on the machining program.

A machine tool includes a turret including first and second stations, a tool storage unit capable of storing tools therein, a machining control unit for controlling a tool in accordance with a machining program, a tool changing unit for replacing the tool attached to the turret with a tool stored in the tool storage unit, and a tool pattern memory for memorizing, as a first tool pattern, a combination of tools at the first and second stations which is associated with a first part of the machining program and, as a second tool pattern, a combination of tools at the first and second stations which is associated with a second part of the machining program after the first part. When machining is stopped during execution of the second part, the tool changing unit changes tools in accordance with a past tool pattern saved in association with a part before stop on the machining program.