Machine tool

Patent metadata

Field	Value
Publication number	US-2024238927-A1
Application number	US-202418403821-A
Country	US
Kind code	A1
Filing date	Jan 4, 2024
Priority date	Jan 16, 2023
Publication date	Jul 18, 2024
Grant date	—

Abstract

A machine tool includes a turret device, a turret slide device configured to slide the turret device along a turret slide axis, a tool spindle device, a tool spindle slide device configured to slide the tool spindle device along a tool spindle slide axis, a numerical control device configured to numerically control the turret slide device and the tool spindle slide device, and a programmable logic controller (PLC) connected to the numerical control device. When control of the turret slide axis for sliding the turret device and control of the tool spindle slide axis for sliding the tool spindle device are switched, the numerical control device shifts the control of the turret slide axis and the control of the tool spindle slide axis by changing a value of a predetermined device in the PLC.

First claim

1 . A machine tool comprising:
a turret device; a turret slide device configured to slide the turret device along a turret slide axis; a tool spindle device; a tool spindle slide device configured to slide the tool spindle device along a tool spindle slide axis; a numerical control device configured to numerically control the turret slide device and the tool spindle slide device; and a programmable logic controller (PLC) connected to the numerical control device, wherein when control of the turret slide axis for sliding the turret device and control of the tool spindle slide axis for sliding the tool spindle device are switched, the numerical control device shifts the control of the turret slide axis and the control of the tool spindle slide axis by changing a value of a predetermined device in the PLC.

2 . The machine tool according to claim 1 ,
wherein by executing a turret NC program for numerically controlling the turret slide device to control the turret slide device, executing a tool spindle NC program for numerically controlling the tool spindle slide device to control the tool spindle slide device, changing a value of the device of the PLC by a command of the turret NC program, and outputting a signal based on the changed value of the device from the PLC to the tool spindle NC program by processing of a ladder program of the PLC, the numerical control device releases control of the tool spindle slide axis necessary for the turret NC program among the tool spindle slide axes controlled by the tool spindle NC program.

3 . The machine tool according to claim 2 ,
wherein at least one of an M code which is a command for numerical control and a macro variable is set in the turret NC program, and the numerical control device executes the turret NC program and changes the value of the device by using at least one of the M code and the macro variable.

4 . The machine tool according to claim 1 ,
wherein the numerical control device controls the turret slide device by executing a turret NC program for numerically controlling the turret slide device and controls the tool spindle slide device by executing a tool spindle NC program for numerically controlling the tool spindle slide device, turret slide axis identification information for identifying the turret slide axis in the turret NC program is set in the turret slide axis, tool spindle slide axis identification information for identifying the tool spindle slide axis in the tool spindle NC program is set in the tool spindle slide axis, when the control of the turret slide axis of the turret slide device and the control of the tool spindle slide axis of the tool spindle slide device are switched, the numerical control device releases the turret slide axis of predetermined turret slide axis identification information among the turret slide axes controlled by the turret NC program from the control of the turret NC program, the numerical control device releases, from the control of the tool spindle NC program, the tool spindle slide axis of the tool spindle slide axis identification information whose axial direction corresponds to the turret slide axis identification information of the turret slide axis whose control is released by the turret NC program among the tool spindle slide axes controlled by the tool spindle NC program, and after the controls of the turret slide axis and the tool spindle slide axis are released, the numerical control device assigns the tool spindle slide axis released from the control of the tool spindle NC program as an axis which is a control target of the turret NC program instead of the turret slide axis released from the control of the turret NC program.

5 . The machine tool according to claim 1 , further comprising:
a first workpiece spindle device configured to rotate a workpiece about a workpiece spindle; and a second workpiece spindle device disposed at a position facing the first workpiece spindle device in a direction parallel to the workpiece spindle, wherein the tool spindle device is disposed between the first workpiece spindle device and the second workpiece spindle device in the direction parallel to the workpiece spindle, the turret device includes a first turret device configured to machine the workpiece held by the first workpiece spindle device and a second turret device configured to machine the workpiece held by the second workpiece spindle device, the turret slide device includes a first turret slide device configured to move the first turret device along a first turret slide axis and a second turret slide device configured to move the second turret device along a second turret slide axis, and when the workpiece held by the first workpiece spindle device is machined by the tool spindle device, the numerical control device changes a value of the device of the PLC, switches control of the first turret slide axis and control of the tool spindle slide axis of the first turret slide device, then controls the tool spindle slide device based on the tool spindle slide axis to move the tool spindle device along the tool spindle slide axis, and machines the workpiece held by the first workpiece spindle device by the tool spindle device.

6 . The machine tool according to claim 5 ,
wherein the numerical control device executes a first turret NC program for numerically controlling the first turret slide device to control the first turret slide device, executes a second turret NC program for numerically controlling the second turret slide device to control the second turret slide device, and executes a tool spindle NC program for numerically controlling the tool spindle slide device to control the tool spindle slide device, the numerical control device changes a value of the device of the PLC by a command of the first turret NC program and outputs a signal based on the changed value of the device from the PLC to the tool spindle NC program by processing of a ladder program of the PLC to release control of the tool spindle slide axis necessary for the first turret NC program among the tool spindle slide axes controlled by the tool spindle NC program, and when the second turret NC program is using the tool spindle slide axis necessary for the first turret NC program, the numerical control device causes processing by the first turret NC program to wait until the second turret NC program releases the tool spindle slide axis necessary for the first turret NC program.

Assignees

• Fuji Corp

Inventors

• Mori Masahiko

Classifications

• G05B2219/45124

  Two spindle lathe · CPC title

• G05B19/18

  Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of program data in numerical form (G05B19/418 takes precedence) · CPC title

• G05B19/05 Primary

  Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts · CPC title

• B23Q3/1572 Primary

  the storage device comprising rotating or circulating storing means · CPC title