JPS63187309A - Numerical control system - Google Patents

Abstract

PURPOSE:To bring NC program transfer control to an NC device and start control of the NC device, etc. to a centralized control by remote operation, by outputting an operating state of a numerical control part to a selector device, and displaying an operating state of the NC device by a lamp. CONSTITUTION:A numerical control part NC of an NC device 13a connected to an NC program generating device 11 by a selecting switch 12a receives ON/OFF signals of each switch in a switch part 12b through a programmable controller PCU. Based on these ON/OFF signals, a prescribed control is executed, and also, the operating state of the numerical control part NCU is outputted to a selector device 12 through the programmable controller PCU, a prescribed lamp of a lamp part 12c is turned on or off, and an operating state of the NC device is displayed. An operator confirms the operating state of the NC device by looking at a lighting state of the lamp, and allows the NC device to execute an object operation by operating a prescribed switch. In such a way, the NC device can be brought to a centralized control by a remote operation.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a numerical control system, and particularly to a numerical control system for remotely controlling an NC device.

<Prior art> An NC program creation device that automatically creates an NC program from input data and transfers the created NC program to an external device such as an NC device;
There is a numerical control system that includes a selector that selectively connects a C program creation device and a predetermined NC device to enable transfer of NC program data between the NC program creation device and the NC device.

In such a numerical control system, the NC program data created by the NC program creation device is transferred to the NC device selected by the selector, or conversely, the NC program modified by the NC device is transmitted to the NC program creation device via the selector. The program files can be stored in a program file unit, which is a mass storage device connected to the NC program creation device.

<Problems to be solved by the invention> In such conventional numerical control systems, the NC program creation device and N
To exchange NC program data between C devices (
By operating a switch provided on the operation panel of the NC device, an operator places the NC device in an NC program reception state or in an NC program transfer state to exchange data.

Also, a predetermined N (-
To perform NC machining based on Go Crum, the operator confirms that the NC device is stopped, then specifies the desired NC program using the switch on the operation panel, and operates the start switch to start NC machining. It was to be carried out.

Therefore, if the NC program creation device and the NC device are located far apart, the operator will have to go back and forth between each device, which is inconvenient.

Therefore, if the NC program creation device is placed near the NC device, the environment for creating NG programs will be poor due to noise in the factory.

In addition, in a system in which the NC program creation device is selectively connected to multiple NC devices via a selector, all the NC devices cannot be placed near the NC program creation device, which reduces efficiency.
The environment will deteriorate together.

From the above, it is an object of the present invention to provide a numerical control system that can centrally manage NC program data transfer system, NC device startup control, etc. by remote control.

<Means for Solving the Problems> FIG. 1 is a block diagram of a numerical control system according to the present invention.

11 is an NC program creation device, 12 is a selector device,
13a to 13n are NC devices, and 14 is a program file unit.

The selector device 12 has a select switch 12a, a switch section 12b, and a lamp section 12c.

Each NC device has a numerical control unit NCU and a programmable controller PCU that exchanges data with the numerical control unit and performs high-power control of the machine tool.

<Operation> The operator selects select 1-switch 1 of the selector device 12.
2a to a predetermined NC device (NC device M13a)
is connected to the NC program creation device 11, the operating state of the NC device is confirmed by checking the lighting state of each lamp in the lamp section 12c, and a predetermined switch in the switch section 12b is operated.

Select 1 - Numerical control unit NCU of NC device 13a connected to NC program creation device 11 by switch 12a
receives on/off signals for each switch in the switch section 12b via the programmable controller PCU, performs predetermined control based on the on/off signals, and also controls the numerical control section NCU via the programmable controller PCU. The operating state is output to the selector device 2 and a predetermined lamp of the lamp section 12c is turned on or off to display the operating state of the NC device.

After that, the operator similarly checks the lighting status of the lamp and performs the NC operation.
After confirming the operating state of the device, operate a predetermined switch to cause the NC device to perform the desired operation.

<Embodiment> FIG. 1 is a block diagram of a numerical control system according to the present invention.

11 is an NC program creation device having a function of creating an NC program and transferring the created NC program to an external device; 12 is a selector device; 13 a to 13 n are NC devices; 14 is connected to the NC program creation device 11 and created NC program or NC device 13a
This is a program file unit of a mass storage device (magnetic disk, floppy disk, etc.) that stores the NC program sent from ~13n.

As shown in FIG. 2, the NC program creation device 11 includes a main body portion 11a having a processor CPU, a random access memory RAM, a read-only memory ROM, and a working memory WKM, a graphic display device 11b, a keyboard LLC, and a disk controller. It has a lid, and interface circuits 11e and Ilf.

The processor CPU of the main unit 11a is the interface 1
Data can be exchanged with a predetermined NC device via the interface 1e, and a predetermined NC program can be read from and stored in the program file unit 1-14 via the interface 11f. Furthermore, N.C.
When creating a program, use a floppy disk FLD.
The system program for creating NC data stored in the WKM is loaded into the RAM, and then, based on the control of the system program, an NC program is created using the interactive home graphic display device 11b and the keyboard LLC, and the NC program is stored in the working memory WKM. The program is then stored in the program file unit 14 or transferred to a predetermined NC device.

Returning to FIG. 1, the selector device 12 includes a select switch 12a for selectively connecting the NC program creation device 11 to a predetermined NC device, and a switch having various switches for remotely controlling the NC device. part 12b;
Lamp unit 12 for displaying various operating states of the NC device
c is provided. FIG. 3 (This is an explanatory diagram of the operation panel of the selector device 12, in which five joint NC devices can be selected from the select switch 12a1ζ, and the switch section 12b is used to transfer the NC program from the NC program creation device 11 to the NC device. Input activation switch SW1 that is pressed when transferring to
An output start switch SW2 that is pressed when transferring the C program to the NC program creation device 11, an operation start switch SW3 that starts the NC device to start NC processing, and a plurality of A work number search switch SW4 that searches for an NC program having a predetermined program number (referred to as a work number) among NC programs, a reset switch SW5 that resets an alarm state, etc., a work number switch SW6 that sets a work number, etc. is provided. The lamp section 12C includes a lamp L1 that lights up during data transfer, a lamp L2 that lights up during NC machining, and a time point 5 when NC program data can be stored in the built-in background RAM even during NC machining. an alarm lamp L4, a lamp L5 that turns on when the NC device enters standby mode, and other lamps L6. ... is provided.

Each NC device 13a to 13n is a numerical control unit NCU-
8 = A programmable controller PCU that exchanges data with the numerical control unit and performs high-power control of the machine tool, etc.
have.

Figure 4 is a block diagram of the NC device, where NCU is the numerical control unit, PCU is the programmable controller, and DSR.
is a data exchange control unit. Note that MCN is a machine tool.

The numerical control unit NCU has a predetermined N value based on the NC program.
The programmable controller PCU controls M- and S from the numerical control unit NCU based on the ladder program.
-, T- Executes predetermined sequence control according to function commands and contact signals from the machine tool MCN, transfers the processing results to the numerical control unit NCU, and based on the processing results, each machine of the machine tool MCN Control elements.

Numerical control unit NCU and programmable controller PC
The transfer of digital signals between U is performed by these numerical control units NCU.
This is performed via a data transfer control unit DSR that includes a bus arbiter (bus control unit) 3a and a common RAM 3b, which are connected to the programmable controller PCU via a bus.

The numerical control unit NCU has a computer configuration, and includes a processor 1a and a ROM that stores a control program.
1b, a background RAM 1c that stores multiple NC programs, a working memory 1d that stores processing results and the NC program currently in use, and a CRT&MDI
It has a device 1e, an axis control section 1f such as a pulse interpolator, and an interface circuit 1g. The processor 1a is capable of exchanging data with the NC program creation device 11 via the interface 1g, and can also directly write data into the common RAM 3b of the data exchange control unit DSR and read the data. There is.

The programmable controller PCU also has a computer configuration, and includes a processor CPU 2a, a program memory (ROM) 2b, a work memory (work RAM) 2c, a digital signal input circuit (digital input circuit) 2d, and a digital signal input circuit. The ROM 2b stores a ladder program (sequence program) LPR and management software Pos for running the ladder program and performing other processing. In addition, the DI terminal of the digital input circuit 2d is connected to the machine tool M.
CN, is also connected to the switch section 12b of the selector device 12, and is also connected to the Do of the digital output circuit 2e.
The terminal is connected to the machine tool and the selector device 12
The lamp 12c is connected to the lamp 12c.

FIG. 5 shows a switch section 12b1 in the selector device 12.
FIG. 3 is an explanatory diagram of the connection relationship between the lamp section 12c and each NC device. Although FIG. 5 shows the connection relationship between only one switch SWI and one lamp L1, other switches and lamps are connected in the same way.

Switch SWI is open collector transistor TR
The collector terminal of the transistor is connected to the base of I, and the collector terminal of the transistor is connected to a multiplexer MPX1, which is connected to the D■ terminal of each NC device.

A predetermined N is selected by the select switch 12a (see Fig. 1).
If the C device is selected and connected to the NC programming device 11, the multiplexer MPX1 receives this selection signal NC.
3, the input terminal (collector terminal) is selected based on N
It is connected to the DI terminal of the C device and inputs the on/off signal of the switch SW1 to the NC device.

The lamp L1 is connected to the collector of a transistor TR2 whose emitter is connected to ground, whose base terminal is connected to a multiplexer MPX2, which is connected to the DO terminal of each NC device. Select switch 12 as in the case of switch SWI
When a predetermined NC device is selected by a, the multiplexer MPX2Z selects the NC device selected based on the selection signal NC3.
The Do terminal of the device is connected to the base terminal of the transistor TR2, and the NC device controls turning on/off of the lamp L1.

The NC program creation device 11, the selector device 12, and the gorogram file unit]4 are all provided in a central control room, and each of the NC devices 13a to 13n is placed in a factory.

The overall operation of the numerical control system according to the present invention will be described below.

N created with the NC program creation device 11 (Fig. 1)
Transfer the C program to a predetermined NC device (this first involves connecting a predetermined NC device (referred to as the NC device 13a) to the NC program creation device 11 using the select switch 12a of the selector device 12. As explained in FIG. 5, all the switches in the switch section 12b are connected to the DI terminal (DI
All the lamps of the lamp part 12c are connected to the DO terminal (D.T) of the NC device 13a via the cable CBO.

T).

Then, the operator operates the input start switch 5WI (see FIG. 3) in the control device M12. As a result, the ON signal of the switch SW1 is applied to the DI terminal of the NC device 13a.

Processor 2a of programmable controller PCU
(FIG. 4) takes in the ON signal of the input start switch SW1 from the DI terminal according to the ladder program LPR, and writes it into the common RAM 3b built in the data transfer control unit DSR. Since the numerical control unit NCU periodically reads the contents of the common RAM 3b, it immediately recognizes that the input start switch SWI has been turned on.

When the processor 1a of the numerical control unit NCU recognizes that the input start switch SWI is turned on, the program is transferred from the NC program creation device 11 via the selector device 12 in parallel with the NG machining control even if it is currently under NC machining control. Coming NC
Background RAM with built-in program data
c (background input mode).

Further, the processor 1a of the numerical control unit NCU writes the fact that the background input mode has been entered into the common RAM 3b of the data exchange control unit DSR.

Processor 2a of programmable controller PCU
periodically reads the contents of the common RAM 3b of the data exchange control unit DSR under the control of the management program PO8, and
A predetermined sequence control is performed based on the ladder program LPR, and a background input mode signal from the numerical control section is output to the selector device 12 via the DO terminal (DOT) of the digital output circuit 2e.

As a result, the lamp L3 (see FIG. 3) of the lamp section 12c indicating that the background mode is in effect lights up, and the operator recognizes that the NC device is in the background input mode.

Thereafter, the operator operates the NG data transfer key provided on the NC program creation device 11 to enter the NC program data transfer state. As a result, the NC program creation device 11 transfers the created NC program data stored in the built-in RAM to the NC device 13a, and stores it in the background RAM 1c (FIG. 4).

In addition, during the transfer of the NC program data of Party B, the numerical control unit
A data transfer raw signal is output from U, the data transfer raw signal is applied to the selector device 12 via the programmable controller PCU, and a lamp L1 indicates that data is being transferred.
lights up.

(b) Remote control NC device 13a for starting NC operation according to a predetermined NC program (this NC device is connected to the select switch 12
(selected in step a) is under NG machining control based on the current NC program, the numerical control section N
An operating signal is output from the CU, and the operating signal is applied to the lamp section 12C of the selector device 12 via the programmable controller PCU, and the lamp L2 indicating that the operation is in progress is lit.

In this state, when the NC machining is completed, the numerical control unit N
The CU sends the machining completion signal to the programmable controller P.
The signal is input to the selector device 12 via the CU, and the lamp L3 indicating that the operation is in progress is turned off.

The operator in the central control room turns off the NC by turning off lamp L3.
After confirming the completion of machining, work number switch SW6
Then, input the number (work number) of the next NC program to be executed (=16-) and operate the work number search switch SW4. As a result, the ON signal of the work number search switch SW4 and the work number are applied to the DI terminal (DIO) of the NC device 13a.

Thereafter, in the same way as described above, these ON signals and work numbers are taken into the numerical control unit NCU via the programmable controller PCU and the data exchange control unit DSR.

Numerical control unit NCU is work number search switch SW4
If you recognize that the is on, the work number (
Program number) is searched from the background RAM 1c and stored in the working memory 1.
d, outputs an NC standby signal, and writes it to the common RAM 3b of the data exchange control unit DSR.

This standby signal is programmable
Lamp unit 1 of selector device 12 via DO terminal of CU
2c, and lights up the lamp L5 indicating standby.

The operator in the central control room turns on the NC by turning on lamp L5.
After confirming that the machine is ready, turn on the operation start switch SW3. As a result, the ON signal of the operation start switch SW3 is transmitted to the DI terminal (D
I O) and the programmable controller P
CU, numerical control unit NC via data exchange control unit DSR
Incorporated into U.

The numerical control unit NCU internally generates a cycle scan signal upon receiving the ON signal of the operation start switch SW3.
NC machining control is executed based on the NC program read into the working memory 1d.

<Effects of the Invention> According to the present invention, the selector device is provided with various operation switches for remotely controlling the NC device connected to the NC program creation device and lamps for displaying various operating states of the NC device, Moreover, each switch and programmable
A cable connects the digital input terminals of the controller, and a cable connects the wrap and the digital output terminals of the programmable controller, and the numerical control section turns on/off the switch provided on the selector device via the programmable controller. Receive the signal and turn it on/off
In addition to performing predetermined control based on the off signal, the operating state of the numerical control section is output to the selector device via the programmable controller, and the operating state of the NC device is displayed by a lamp. NG
Program transfer control, NC device startup control, etc. can now be centrally managed by remote control.

Further, according to the present invention, the NC program creation device can be placed in a quiet centralized control room, so the environment for creating NG programs can be improved.

Furthermore, according to the present invention, since centralized management is possible, each N
There is no need to assign an operator to each C device, making it possible to save labor.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the numerical control system according to the present invention, Fig. 2 is a block diagram of the NC program creation device, Fig. 3 is an explanatory diagram of the operation panel of the selector device, Fig. 4 is a block diagram of the NC device, Figure 5 shows the switch, lamp and NC in the selector device.
FIG. 2 is an explanatory diagram of the connection relationship between DI and Do terminals in the device. 11...NC program creation device, 12...Selector device, 12a...Select switch, 12b...Switch section, 12C...Lamp section, 13a~
13n=NC device, 14...Program file unit, NCU...Numerical control unit, PCU...Programmable controller, DIT...
Digital output terminal, DOT...Digital output terminal,

Claims (1)

[Claims] An NC program creation device having a function of creating an NC program and transferring it to an external device, a numerical control section, and the numerical control section exchange data with each other to perform high-power control of a machine tool. In a numerical control system having an NC device equipped with a programmable controller that performs NC program creation, and a selector device that selectively connects the NC program creation device and a predetermined NC device to enable transfer of the NC program, The selector device is equipped with various operation switches for remotely controlling the NC device connected to the device and lamps for displaying various operating states of the NC device, and a cable is connected between the switch and the digital input terminal of the programmable controller. to turn on/off each switch.
The off signal is input to the programmable controller, and a cable is connected between the lamp and the digital output terminal of the programmable controller to output the on/off signal for each lamp from the programmable controller, and the numerical control section is connected to the programmable controller. The selector device receives the on/off signal of the switch provided in the selector device via the selector device, performs predetermined control based on the on/off signal, and controls the operating state of the numerical control section via the programmable controller. A numerical control system characterized by displaying the operating status of an NC device by outputting an output to a lamp.