A numerical control device includes a main control unit, a processing program reading unit, and a tool moving path setting unit that sets moving paths of a processing tool between a plurality of recessed parts. The tool moving path setting unit includes: a tool retreat position setting unit that sets a retreat position to be assumed by the processing tool upon completion of internal surface processing; a cutting edge stop angle setting unit that sets a stop angle of a cutting edge, on the basis of a moving direction toward a next recessed part; and a tool retreat path setting unit that sets a retreat path of the processing tool. The stop angle is set in such a manner that a pointing direction of the cutting edge does not have a moving vector component oriented in a same direction as the moving direction.

Provided is a control device for a machine tool, the control device being capable of reliably reducing noise when gears mesh with each other and providing intended machining quality. A control device 10 for a machine tool machines a workpiece W including at least one tooth surface and comprises: a machining condition input unit 15 which can input a machining condition including at least one of specifications of the workpiece W, specifications of a tool T, a feed speed, the rotational speed of a spindle, and the number of teeth; a surface pattern calculation unit 16, which calculates, on the basis of the machining condition, a surface pattern defined on the basis of intervals of scratches occurring on a machined surface; a swing command generation unit 17, which generates, on the basis of the surface pattern, a swing command for achieving a surface pattern including a portion in which the intervals of the scratches are unequal; and a position and speed control unit 14 which carries out the machining while swinging the workpiece W and the tool T relatively to each other on the basis of the swing command generated by the swing command generation unit 17.

A control method of superimposition processing in an NC machine tool comprises providing at least one tool rest that performs machine processing to workpieces respectively held on a plurality of spindles, providing respective processing programs for performing respective machine processing to the workpieces held on the respective spindles, and inserting superimposition control program for performing superimposition processing during one of the respective processing programs is running. The superimposition processing is performed so that, during an operation of performing machine processing to a workpiece held on one of the plurality of spindles by one of the plurality of tools, the other operation of performing machine processing to a workpiece held on another one of the plurality of spindles by another one of the plurality of tools is superimposed.

A numerical value controller includes: a storage unit storing a machining program involving executing canned cycles including a first operation for moving a tool to a return point, a second operation for positioning a drilling position of a workpiece relative to the tool, a third operation for moving the tool from the return point to a hole bottom point, and a fourth operation for moving the tool from the hole bottom point to a terminal point located toward the hole bottom point relative to the return point; a control unit controls relative movement between the tool and the workpiece based on the machining program and moves the tool along curved paths by starting the second operation before the first operation ends and by starting the third operation before the second operation ends; and a distance calculating unit calculates a retraction distance from the workpiece to the return point.

A data interface device including a first interface module configured for data transmission with a tool data management device, a second interface module configured for data transmission with a control device of a numerically controlled tool machine, and a data processing unit. The data interface device is configured to receive tool data of a tool usable in numerically controlled machine tools from the tool data management device via the first interface module and to transmit the tool data to the control device of the machine tool via the second interface module. The second interface module is connectable to a plurality of control devices of numerically controlled machine tools, and the data processing unit is configured to convert a data format of the tool data received via the first interface module into a target data format readable by a respective control device which receives the tool data.

Provided are an operation control device and program, which are capable of appropriately combining drive signals of two systems enabling improvement in processing speed while suppressing occurrence of a synchronization error. The present invention comprises: a first drive signal output unit that outputs a first drive signal that is a drive signal of a first system; a second drive signal output unit that outputs a second drive signal that is a drive signal of a second system; a transfer characteristic acquisition unit that acquires a transfer characteristic of position control of the first system; a correction unit that corrects the output first drive signal to obtain a corrected drive signal by using the acquired transfer characteristic; a first operation speed calculation unit that calculates the operation speed of the first system from the corrected drive signal as a first operation speed; a second operation speed calculation unit that calculates the operation speed of the second system from the second drive signal as a second operation speed; a synthesized drive signal generation unit that generates a synthesized drive signal by combining the corrected drive signal and the second drive signal; and an operation control unit that controls the operation of the second system by using the first operation speed, the second operation speed, and the synthesized drive signal.