JPH07120182B2 - Numerical control system - Google Patents

Description

The present invention relates to a numerical control system, and more particularly to a numerical control system for remotely controlling an NC device.

<Prior art> An NC program is automatically created from the input data,
An NC program creating device having a function of transferring the created NC program to an external device such as an NC device, and selectively connecting the NC program creating device and a predetermined NC device to the NC program creating device and the NC. There is a numerical control system with a selector that allows the transfer of NC program data between devices.

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 modified by the NC device.
The program can be transferred to the NC program creating device via the selector and stored in the program file unit, which is a mass storage device connected to the NC program creating device.

<Problems to be Solved by the Invention> In such a conventional numerical control system, an operator is provided on the operation panel of the NC device in order to exchange NC program data between the NC program creating device and the NC device. By operating a switch, the NC device is put in an NC program receiving state or in an NC program transferring state to exchange data.

Also, in order to perform NC processing based on a predetermined NC program stored in the RAM built in the NC device, the operator confirms the stopped state of the NC device, and then specifies the predetermined NC program with the switch on the operation panel. In addition, the start switch was operated to perform NC machining.

Therefore, if the NC program creating device and the NC device are separated from each other, the operator has to go back and forth between the devices, which is inconvenient.

Therefore, if the NC program creating device is placed near the NC device, the environment for creating the NC program becomes worse due to noise in the factory.

In addition, NC program creation device
In a system that selectively connects to NC devices, all NC devices are NC
Since it cannot be placed near the program creation device, both efficiency and environment deteriorate.

In view of the above, an object of the present invention is to provide a numerical control system capable of centrally managing NC program data transfer control, NC device start-up control and the like by remote control.

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

11 is an NC program creating device, 12 is a selector device, and 13a to 1
3n is an NC device, and 14 is a program file unit.

The selector device 12 includes a select switch 12a and a switch section 12b.
And a lamp portion 12c. Numerical control unit NCU for each NC unit
And a programmable controller PCU for exchanging data with the numerical control unit and performing high-power control of the machine tool.

<Operation> The operator uses the select switch 12a of the selector device 12 to connect a predetermined NC device (referred to as an NC device 13a) to the NC program creating device 11 and observes the lighting state of each lamp in the lamp part 12c. Check the operating status of the device,
A predetermined switch in the switch unit 12b is operated.

The numerical control unit NCU of the NC device 13a connected to the NC program creation device 11 by the select switch 12a receives the ON / OFF signal of each switch in the switch unit 12b via the programmable controller PCU, and outputs the ON / OFF signal to the ON / OFF signal. While performing a predetermined control based on the programmable controller PCU to output the operating state of the numerical control unit NCU to the selector device 12 to turn on or off a predetermined lamp of the lamp unit 12c to determine the operating state of the NC device. Display it.

Thereafter, similarly, the operator confirms the operating state of the NC device by looking at the lighting state of the lamp, and operates a predetermined switch to cause the NC device to execute a desired operation.

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

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

As shown in FIG. 2, the NC program creating device 11 has a main body 11a having a processor CPU, a random access memory RAM, a read only memory ROM and a working memory WKM.
And graphic display device 11b and keyboard 1
1c, a disk controller 11d, and interface circuits 11e and 11f. The processor CPU of the main body 11a can exchange data with a predetermined NC device via the interface 11e, and can read and store a predetermined NC program from the program file unit 14 via the interface 11f. ing. still,
Floppy disk FLD for creating NC program
The NC data creating system program stored in the RAM is loaded into the RAM, and then the NC program is created interactively using the graphic display device 11b and the keyboard 11c under the control of the system program to create the working memory WKM. And 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 creating device 11 to a predetermined NC device, and a switch section having various switches for remotely operating the NC device. 12b and a lamp section 12c for displaying various operating states of the NC device are provided.
FIG. 3 is an explanatory view of the operation panel of the selector device 12. Up to five NC devices can be selected by the select switch 12a, and the NC program is created from the NC program creating device 11 to the NC device in the switch section 12b. Input start switch SW1 that is pressed when transferring to the NC output, and output start switch SW2 that is pressed when transferring the NC program corrected from the NC device to the NC program creating device 11, and NC processing start of the NC device. It has an operation start switch SW3 for starting and a predetermined program number (called work number) among a plurality of NC programs stored in the RAM built in the NC device.
A work number search switch SW4 for searching an NC program, a reset switch SW5 for resetting an alarm state, and a work number switch SW6 for setting a work number are provided. The lamp part 12c has a lamp L1 that lights up during data transfer, a lamp L2 that lights up during NC machining, and lights up when NC program data can be stored in the built-in background RAM even during NC machining. There are provided a lamp L3, an alarm lamp L4, a lamp L5 which is turned on when the NC device is in a processing standby state, and other lamps L6 ,.

Each of the NC devices 13a to 13n has a numerical control unit NCU and a programmable controller PCU for exchanging data with the numerical control unit and performing high-power control of the machine tool.

FIG. 4 is a block diagram of the NC device. The NCU is a numerical controller, the PCU is a programmable controller, and the DSR is a data transfer controller. MCN is a machine tool.

The numerical control unit NCU performs predetermined NC control based on the NC program to move the machine movable part (tool or table), and the programmable controller PCU controls the M-, S- from the numerical control unit NCU based on the ladder program. , T-function command and a predetermined sequence control according to a contact signal from the machine tool MCN etc. are executed, and the processing result is displayed in the numerical control unit NCU.
And controls each machine element of the machine tool MCN based on the processing result.

Digital signal transfer between the numerical control unit NCU and the programmable controller PCU is performed by a data transfer control unit including a bus arbiter (bus control unit) 3a and a common RAM 3b which are connected to the numerical control unit NCU and the programmable controller PCU by a bus. It is done through DSR.

The numerical control unit NCU has a computer configuration,
A processor 1a, a ROM 1b for storing a control program,
Background RAM 1c that stores multiple NC programs
It has a working memory 1d for storing the processing result and the NC program currently in use, a CRT & MDI device 1e, an axis control unit 1f such as a pulse interpolator, and an interface circuit 1g. The processor 1a can exchange data with the NC program creating device 11 via the interface 1g, and can directly write or read data in the common RAM 3b of the data exchange control unit DSR.

The programmable controller PCU also has a computer configuration, and includes a processor CPU2a, a program memory (ROM) 2b, a work memory (work RAM) 2c, a digital signal input circuit (digital input circuit) 2d, and a digital signal. Management software that has an output circuit 2e for the ROM2b, runs the ladder program (sequence program) LPR and the ladder program in the ROM2b, and performs other processing.
POS is stored. The DI terminal of the digital input circuit 2d is connected to the machine tool MCN and the selector device 12
Connected to the switch section 12b of the digital output circuit 2e
DO terminal is connected to the machine tool and selector device
Connected with 12 lamps 12c.

FIG. 5 is an explanatory view of the connection relationship between the switch unit 12b, the lamp unit 12c and each NC device in the selector device 12. Although FIG. 5 shows the connection relationship only for one switch SW1 and one lamp L1, other switches and lamps are similarly connected.

The switch SW1 is connected to the base of the open collector transistor TR1, and the collector terminal of the transistor is connected to the multiplexer MPX1.
It is connected to the DI terminal of the device. Select switch 12a
If a predetermined NC device is selected by (see FIG. 1) and connected to the NC program creating device 11, the multiplexer MPX1
Connects the input terminal (collector terminal) to the DI terminal of the selected NC device based on this selection signal NCS, and switches SW
Input the ON / OFF signal of 1 to the NC device.

Lamp L1 is a transistor TR whose emitter is grounded
2 and the base terminal of the transistor is connected to the multiplexer MPX2.
Is connected to the DO terminal of each NC unit. Similar to the case of the switch SW1, when a predetermined NC device is selected by the select switch 12a, the multiplexer MPX2 connects the DO terminal of the NC device selected based on the selection signal NCS to the base terminal of the transistor TR2, and the lamp L1. The NC device is controlled to turn on / off the light.

The NC program creation device 11, the selector device 12, and the program file unit 14 are both provided in a centralized control room.
The NC devices 13a-13n are located in the factory.

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

(A) NC data transfer operation from the NC program creating device to the NC device To transfer the NC program created by the NC program creating device 11 (Fig. 1) to a predetermined NC device, first select the selector device.
A predetermined NC device (referred to as NC device 13a) is connected to the NC program creating device 11 by using 12 select switches 12a.
As a result, as described in FIG. 5, all the switches in the switch unit 12b are connected to the D of the NC device 12a via the cable CBI _1.
All the lamps of the lamp section 12c are connected to the I terminal (DIT) and are connected to the DO terminal (DOT) of the NC device 13a via the cable CBO ₁ .

Then, the operator operates the input starting switch SW1 (see FIG. 3) in the selector device 12. This allows
The ON signal of the switch SW1 is applied to the DI terminal of the NC device 13a.

The processor 2a (FIG. 4) of the programmable controller PCU fetches the ON signal of the input activation switch SW1 from the DI terminal according to the ladder program LPR and writes it in the common RAM 3b with the built-in 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 activation switch SW1 is turned on.

Numerical control unit NCU if the input start switch SW1 is recognized
The processor 1a can store the NC program data transferred from the NC program creating device 11 through the selector device 12 in parallel with the NC machining control in the built-in background RAM 1c even during the NC machining control. State (background input mode).

Further, the processor 1a of the numerical control unit NCU indicates that the background input mode has been entered, and the common RAM of the data transfer control unit DSR.
Write to 3b.

The processor 2a of the programmable controller PCU periodically controls the data transfer control unit DSR under the control of the management program POS.
While reading the contents of the common RAM3b of, the predetermined sequence control based on the ladder program LPR, the background input mode signal from the numerical control unit to the selector device 12 via the DO terminal (DOT) of the digital output circuit 2e. Output.

As a result, the lamp L3 (see FIG. 3) that indicates that the lamp unit 12c is in the background mode is turned on, and the operator turns NC.
Recognize that the device is in background input mode.

After that, the operator operates the NC data transfer key provided in the NC program creating device 11 to bring it into the NC program data transfer state. This allows the NC program creation device 11
Transfers the created NC program data stored in the built-in RAM to the NC device 13a, and the background RAM 1c (4th
).

During the NC program data transfer, the numerical control unit NCU outputs a data transfer signal, and the data transfer signal is transmitted via the programmable controller PCU to the selector device 1.
The lamp L1 that is applied to 2 and indicates that data is being transferred is turned on.

(B) Remote control of NC operation start by a predetermined NC program If the NC device 13a (this NC device is selected by the select switch 12a) is currently under NC control based on another NC program. An operation signal is output from the numerical control unit NCU, the operation signal is applied to the lamp unit 12c of the selector device 12 via the programmable controller PCU, and the lamp L2 indicating that the vehicle is in operation is lit.

In this state, when NC machining is completed, the numerical control unit NCU
Inputs a machining completion signal to the selector device 12 via the programmable controller PCU to turn off the lamp L3 indicating that the operation is in progress.

When the operator of the central control room confirms the end of NC processing by turning off the lamp L3, sets the work program number SW6 to the NC program number (work number) to be executed next, and operates the work number search switch SW4. To do. As a result, the ON signal of the work number search switch SW4 and the work number are the DI terminal (DIO) of the NC device 13a.
Applied to.

After that, the ON signal and the work number are the programmable controller PCU and the data transfer control unit DSR as in the above.
It is taken into the numerical control unit NCU via.

When the numerical control unit NCU recognizes that the work number search switch SW4 is turned on, the NC program having the work number (program number) fetched at the same time is stored in the background RAM1.
Search from c and read to working memory 1d, output NC processing standby signal to output common data from data transfer control unit DSR.
Write to AM3b.

This standby signal is a programmable controller PC
It is applied to the lamp section 12c of the selector device 12 via the DO terminal of U to turn on the lamp L5 indicating the processing standby.

The operator in the central control room confirms that the NC processing standby is activated by turning on the lamp L5 and confirms that the operation start switch SW
Turn 3 on. As a result, the ON signal of the operation start-up switch SW3 is applied to the DI terminal (DIO) of the NC device 13a and taken into the numerical controller NCU via the programmable controller OCU and the data transfer controller DSR.

The numerical control unit NCU internally generates a cycle start signal by receiving the ON signal of the operation start switch SW3, and based on the NC program read in the working memory 1d, NC
Execute processing control.

<Effects of the Invention> According to the present invention, the selector device is provided with various operation switches for remotely operating the NC device connected to the NC program creating device and lamps for displaying various operating states of the NC device. Moreover, each switch and the digital input terminal of the programmable controller are connected with a cable, and the lamp and the digital output terminal of the programmable controller are connected with a cable, and the numerical controller is provided in the selector device via the programmable controller. The ON / OFF signal of the switch is received, the predetermined control is performed based on the ON / OFF signal, and the operating state of the numerical control unit is output to the selector device via the programmable controller to output the NC device by the lamp. Since it is configured to display the operating status, NC program transfer control to the NC device It has become possible to centrally manage the startup control of NC devices and NC devices by remote control.

Further, according to the present invention, since the NC program creating device can be placed in a quiet centralized control room, the NC program creating environment can be improved.

Furthermore, according to the present invention, since centralized management is possible, each NC
Labor saving has become possible because it is not necessary to arrange an operator for each device.

[Brief description of drawings]

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

Claims (1)

[Claims] 1. A NC program creating device having a function of creating an NC program and transferring it to an external device, and a numerical control unit and the numerical control unit exchange data mutually to perform high-power control of a machine tool. In a numerical control system having an NC device equipped with a programmable controller and a selector device for selectively connecting an NC program creating device and a predetermined NC device to enable transfer of an NC program, an NC program creating device The selector device is equipped with various operation switches for remote operation of the NC device connected to the and the 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. ON / OFF of each switch
The off signal is input to the programmable controller, and the lamp and the digital output terminal of the programmable controller are connected by a cable to output the lighting / extinguishing signal of each lamp from the programmable controller. The numerical controller is the programmable controller. An ON / OFF signal of the switch provided in the selector device is received via the ON / OFF signal, predetermined control is performed based on the ON / OFF signal, and the operation state of the numerical control unit is changed via the programmable controller. The numerical control system is characterized in that the operating status of the NC device is displayed by a lamp and displayed on the screen.