Fanuc Corporation

Kenta Yamamoto

Naoto Sonoda

Ryou Morihashi

Masakazu Niwa

Yusaku Oho

Shunpei Tanaka

Masashi Yasuda

Yasusuke Iwashita

Tadashi Okita

Junichi Tezuka

Yuuki Kumamoto

Yuutarou Horikawa

Yuuki Morita

Hiroyuki Kawamura

Shinichi Horikoshi

Kouki Oikawa

Yuuta Sekikawa

Naoya Nishinaga

Provided is a machine tool control device capable of promptly determining a frequency parameter and an amplitude parameter for a desired oscillation instruction enabling shredding of a chip. A machine tool control deviceperforms machining while causing a tool T and a workpiece W to oscillate relative to each other. The machine tool control deviceis provided with an oscillation instruction calculation unitthat calculates an instruction for an oscillating operation; a first oscillation condition determination unitthat determines, as a first oscillation condition, one of a frequency parameter constituted of a frequency or a frequency multiplying factor of the oscillation instruction, and an amplitude parameter constituted of an amplitude or an amplitude multiplying factor of the oscillation instruction; and a second oscillation condition calculation unitthat calculates, as a second oscillation condition, the other of the frequency parameter and the amplitude parameter on the basis of the first oscillation condition determined by the first oscillation condition determination unit

Machine tool control device

To provide a controller for a machine tool that can shred shavings in a sure manner, even if a delay in notification occurs at the time of performing oscillation cutting. This controller of machine tools controls the machine tools that perform cutting working of a work by a cutting tool with a spindle and a feed axis operating cooperatively. The controller includes: an oscillation command calculating unit that calculates an oscillation command to cause relative oscillation of the cutting tool and the work, from a rotation speed of the spindle and a positional command of the cutting tool as to the work; a correction amount calculating unit that calculates a correction amount corresponding to an amount of delay notification to the oscillation command calculating unit regarding the rotation speed of the spindle; and a correction amount superimposing unit that superimposes the correction amount on the oscillation command.

Controller for machine tool

A machine tool control device which reliably divides and discharges chips, and which suppresses damage to a tool by reducing shock when the tool cuts into a workpiece. The machine tool control device causes the tool to rotate and executes a cutting process to move the tool and the workpiece while causing the same to oscillate relative to one another in a feed direction, and is provided with an oscillation command generating unit which generates an oscillation command on the basis of a predetermined oscillation condition. A position and speed control unit controls a motor by superimposing the oscillation command generated by the oscillation command generating unit onto a position command or a position deviation. The oscillation command generating unit changes an oscillation command phase progression method and/or an oscillation command amplitude on the basis of an oscillation phase calculated from on a predetermined oscillation condition, or based on time.

Provided is a machine tool control device that can generate movement commands of any required command form and that can also suppress the deviation of a peak position during air cutting. A machine tool control devicethat performs processing while making a tool and a workpiece oscillate relative to each other. The machine tool control devicecomprises an oscillation conditions setting unitthat sets oscillation conditions, an oscillation phase division unitthat divides an oscillation phase into a plurality of segments, a layered command calculation unitthat, for each of the divided segments, calculates a layered command as a movement command on the basis of the oscillation conditions, and a position and speed control unitthat makes the tool and the workpiece oscillate relative to each other on the basis of the layered commands.

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 devicefor a machine tool machines a workpiece W including at least one tooth surface and comprises: a machining condition input unitwhich 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, 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, 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 unitwhich 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

Control device for machine tool

The purpose of the present invention is to provide a device for controlling a machine tool with which it is possible to smoothly stop oscillation at an arbitrary timing without loss of cutting-chip-shredding performance, and to minimize shock produced in the machine tool. The present invention provides a devicefor controlling a machine tool for performing machining while causing a tool and a workpiece to oscillate relative to each other, the devicefor controlling a machine tool comprising: an oscillation command generation unitfor generating an oscillation command on the basis of a machining condition and an oscillation condition; an oscillation stoppage assessment unitfor assessing the timing of oscillation stoppage; and a position speed control unitfor causing, on the basis of a superimposition command generated by superimposing the oscillation command onto a position command or a position deviation, the tool and the workpiece to oscillate relative to each other. The oscillation command generation unitcauses the oscillation amplitude to gradually attenuate from the timing at which oscillation stoppage is communicated from the oscillation stoppage assessment unit

The purpose of the present invention is to provide a control device for a machine tool that can reliably chop chips while suppressing vibration of the machine tool. A control device () for a machine tool machines by relatively oscillating a tool and a workpiece, the control device comprising: an oscillation command generation unit () that calculates an oscillation amplitude and an oscillation frequency from a machining condition and generates an oscillation command; and a position-speed control unit () that relatively oscillates the tool and the workpiece on the basis of a superimposed command generated by superimposing the oscillation command generated by the oscillation command generation unit () on a position command or a position deviation. The oscillation command generation unit () changes the oscillation amplitude and/or the oscillation frequency during machining.

A control device calculates a position deviation between a position of a movable member designated by a position command and a measured position of the movable member by a position detector at each sampling period, adds a disturbance signal generated from a phase signal having a predetermined period to a drive signal generated from the position deviation to which an amount of correction is added, causes a motor for driving the movable member to operate based on the drive signal to which the disturbance signal is added, calculates the amount of correction by using a dynamic characteristic compensation filter in such a way as to reduce the position deviation, and changes a configuration of the dynamic characteristic compensation filter in such a way that an evaluation value related to magnitude of the position deviation satisfies a predetermined condition.

Motor control device and motor control computer program

When the rotation direction of a motor is determined by a connection determination unit not to match a rotation command, the phase sequence of a current detection signal and the phase sequence of a voltage command are changed by a phase sequence change unit, or the positive/reverse polarity of an encoding signal outputted from an encoder is inverted by the phase sequence change unit, whereby the rotation direction of the motor controlled by a motor control device can match the rotation command.

Motor control device

A chatter vibration determination device is provided with a machine learning device configured to observe machining condition data including a feed speed and a spindle rotational frequency in cutting as state data representative of the current state of environment, execute processing related to machine learning using a learning model obtained by modeling the relationship of chatter vibration with a machining condition for the cutting, based on the state data, and estimate the occurrence/non-occurrence of chatter vibration and the improvement of the chatter vibration. The chatter vibration determination device outputs the result of the estimation of the occurrence/non-occurrence of the chatter vibration and the improvement of the chatter vibration.

Chatter vibration determination device, machine learning device, and system

To provide a control device for a machine tool capable of performing thread cutting while reducing the load on the machine tool from the oscillating operation, without extending the cycle time, and capable of reliably shredding chips in a case of performing the non-oscillating operation in the present pass after the oscillating operation in the previous pass. A control device for a machine tool includes: an oscillating operation execution determination unit that determines whether to execute an oscillating operation that causes the cutting tool to oscillate in the radial direction of the workpiece; an oscillation command generation unit that generates an oscillation command of the oscillating operation based on a determination result; a control unit that superimposes the oscillation command on a position command of the feed axis to generate a drive command. The oscillating operation execution determination unit determines to intermittently execute the oscillating operation, and the oscillation command generation unit generates an oscillation command so that a non-oscillating cutting portion of a present pass includes a portion at which oscillating cutting was performed in a previous pass, or so that an oscillating cutting portion of the present pass includes a portion at which non-oscillating cutting was performed in the previous pass.

A servo controllerincludes: an oscillation command generating unitthat generates an oscillation command for causing the workpiece W and the toolto relatively oscillate; at least one of a position control unitthat generates a position command for causing the workpiece W and the toolto relatively move, a speed control unitthat generates a speed command for causing the workpiece W and the toolto relatively move, and a current control unitthat generates a torque command for driving the plurality of axes; and a gain changing unitthat changes a control gain, in which the oscillation command generating unittransmits a signal outputted when oscillating operation is started to the gain changing unit, and the gain changing unitchanges the control gain.

Servo controller

A control device for machine tools according to an aspect of the present disclosure controls a machine tool which cuts the workpiece by way of the cutting tool by causing the spindle and the feed axis to cooperatively act, the control device including: a feed command calculation unit which calculates a feed command for causing the feed axis to relatively move in relation to the workpiece; an oscillation phase calculation unit which calculates an oscillation phase that is a phase of oscillation to cause the feed axis to reciprocally move based on a rotation number of the spindle; an oscillation phase compensation unit which compensates the oscillation phase; an oscillation amplitude calculation unit which calculates an oscillation amplitude that is an amplitude of oscillation causing the feed axis to reciprocally move based on the feed command; an oscillation command calculation unit which calculates an oscillation command causing the feed axis to reciprocally move, based on the oscillation amplitude and the oscillation phase after compensation by the oscillation phase compensation unit; and a command synthesizing unit which calculates a synthetic command for driving the feed axis by superimposing the feed command and the oscillation command.

Control device for machine tools and machine tool control method

Provided is a servo controller that can prevent an unnecessary cut from being generated during oscillation machining. A servo controller which controls a machine toolthat turns a workpiece W by cooperative operation of a plurality of axes includes: an oscillation command generating unitthat generates an oscillation command for causing the workpiece W and the toolto relatively oscillate; a deviation deducting unitthat applies the oscillation command to a position deviation based on a moving command for causing the workpiece W and the toolto relatively move, and deducts a steady-state position deviation; and a learning control unitthat calculates a compensation amount from a position deviation based on the moving command after deducting the steady-state position deviation.

Growing community of inventors

Yamanashi, Japan

Kenta Yamamoto