WO2018051785A1

WO2018051785A1 - Operational status monitoring device

Info

Publication number: WO2018051785A1
Application number: PCT/JP2017/031054
Authority: WO
Inventors: 水野　貴司; 大作鯰江; 大高橋
Original assignee: 株式会社シムトップス
Priority date: 2016-09-14
Filing date: 2017-08-30
Publication date: 2018-03-22
Also published as: JP2018045400A; JP6169236B1

Abstract

The present invention provides an operational status monitoring device with which it is possible to easily and inexpensively monitor and record the operational status of an NC machine tool. A character information acquisition unit selectively acquires one of predetermined multiple types of character information from outside. A control signal acquisition unit acquires a control signal to be outputted or inputted by a computer. A control unit receives the character information and the control signal, and determines the operational status of an NC machine tool by using a determination table read out from a determination table storage unit, and causes a determination result to be displayed in a display unit. The control unit also adds time information to the received character information and control signal, and sequentially stores both in a database.

Description

Operation status monitoring device

The present invention relates to an operation status monitoring apparatus that monitors and records the operation status of a manufacturing apparatus controlled by a computer, such as an NC (Numerical Control) machine tool.

Conventionally, as NC machine tools, those having a function of monitoring and recording various operation information are known (for example, see Patent Document 1 below).

In the NC machine tool of Patent Document 1, for example, the state of the machine tool is checked at intervals of 5 seconds, and if there is a change in the state, various operation information is recorded.

Such an NC machine tool can grasp the progress of the work and can review the machining conditions and the machining program.

Japanese Patent Laid-Open No. 10-143220

However, the technique disclosed in Patent Document 1 has a drawback in that the NC machine tool must be provided with various detectors for detecting the operating state, which makes the NC machine tool expensive.

An object of the present invention is to provide an operation status monitoring device that can easily and inexpensively monitor and record the operation status of a manufacturing apparatus such as an NC machine tool.

In order to solve such a problem, an operation status monitoring device according to the present invention is an operation status monitoring device that monitors the operation status of a manufacturing apparatus controlled by a computer, and includes a plurality of predetermined progress stages in the manufacturing process. A plurality of types of character information shown respectively, a character information acquisition unit that acquires from the outside when the corresponding progress stage is reached, a control signal acquisition unit that acquires a control signal output or input by the computer, and the corresponding Based on a combination of character information and the control signal, a determination table for determining the operating status of the manufacturing apparatus in each progress stage, and a control unit that determines the operating status using the determination table; It is characterized by providing.

In the present invention, it is desirable to further include a database that sequentially stores the character information acquired by the character information acquisition unit and the control signal acquired by the control signal acquisition unit together with time information.

In the present invention, the computer has a function of outputting predetermined character information as print information based on an instruction of a control program, and the character information acquisition unit temporarily stores the character information indicated by the print information. It is desirable to do.

In the present invention, it is desirable that the character information is information obtained by selectively reading one of a plurality of types of barcodes by an operator operating a barcode reader.

In the present invention, it is desirable that the plurality of pieces of character information include character information indicating the type of product manufactured by the manufacturing apparatus in addition to character information indicating a progress stage of the manufacturing process by the manufacturing apparatus.

According to the present invention, since the operating status can be determined from the combination of the character information and the control signal, the operating status of the manufacturing apparatus can be recorded and determined easily and inexpensively.

In the present invention, by sequentially storing character information and control signals in a database, it is easy to check the operating status of the manufacturing apparatus later and to monitor such operating status remotely via a communication line. become.

In the present invention, operation of the system is simplified by automatically capturing character information from a computer using a print command of a control program.

In the present invention, character information can be captured at low cost by a simple operation by capturing character information using a barcode.

In the present invention, by including the character information indicating the type of product as the character information, it is possible to monitor the operating status in detail according to the type of product.

It is a block diagram which shows roughly the whole structure of the manufacturing system using the operating condition monitoring apparatus which concerns on Embodiment 1 of this invention. FIG. 2 is a block diagram schematically showing a main configuration of the NC machine tool according to the first embodiment. It is the block diagram which showed roughly the principal part structure of the operating condition monitoring apparatus which concerns on Embodiment 1. FIG. It is a conceptual diagram for demonstrating the data stored in the database which concerns on the same Embodiment 1. FIG. It is a conceptual diagram for demonstrating the determination table which concerns on the same Embodiment 1. FIG.

Hereinafter, Embodiment 1 of the present invention will be described by taking as an example a case where it is applied to a manufacturing system for performing NC (numerical control) machining (hereinafter referred to as “NC machining system”). The present invention is not limited to the NC machine system, and can be applied to other manufacturing systems as long as the manufacturing system is used.

FIG. 1 is a block diagram schematically showing the overall configuration of the NC machining system according to the first embodiment.

As shown in FIG. 1, the NC machining system 100 according to the first embodiment includes a DNC (Direct Numerical Control) device 110, an NC machine tool 120, and an operation status monitoring device 130.

The DNC device 110 is connected to one or a plurality of NC machine tools 120 via a LAN (Local Area Network) or other communication line (only one is shown in FIG. 1). Provide NC data.

The NC machine tool 120 is a manufacturing apparatus that performs control using a computer. The NC machine tool 120 performs NC machining based on the NC data received from the DNC device 110.

The operation status monitoring device 130 is connected to one or a plurality of NC machine tools 120 via a communication line or the like, and sequentially stores print information P and control signals C1-C4 taken from these NC machine tools 120. At the same time, the operating status of the NC machine tool 120 is determined and displayed from the combination of the character information and the control signal.

FIG. 2 is a block diagram schematically showing a main configuration of the NC machine tool 120.

As shown in FIG. 2, the NC machine tool 120 includes a CPU 201, a drive unit 202, an operation panel 203, a print interface 204, and the like.

CPU201 receives NC data from the above-mentioned DNC device 110. The CPU 201 includes a memory (not shown) that stores a control program.

The CPU 201 controls various motors (not shown) in the drive unit 202 using the NC data and the control program. For this purpose, the CPU 201 sends a drive control signal, a primary stop signal, and the like to the drive unit 202.

The CPU 201 transmits and receives control signals to and from the operation panel 203. For example, when an operator turns on a start switch (not shown) of the operation panel 203, a start signal is sent to the CPU 201, and the NC machine tool 120 starts operation. Further, for example, when the operator operates an override dial (not shown) of the operation panel 203, a control signal for changing the cutting speed in the drive unit 202 is sent to the CPU 201. On the other hand, for example, an alarm signal may be generated by the CPU 201 and sent to the operation panel 203, and an alarm notification (output of an alarm sound, blinking of alarm light, etc.) may be performed on the operation panel 203. Each control signal may be a 1-bit signal or a multi-bit signal.

In the first embodiment, a part of a control signal transmitted / received between the CPU 201 and the drive unit 202 or the operation panel 203 is also sent to the operation status monitoring device 130. In the example of FIG. 2, control signals for the

signal cables

205a, 205b, 205c, and 205d are sent to the operation status monitoring apparatus 130 via the

signal cables

206a, 206b, 206c, and 206d. In the example of FIG. 2, four types of control signals C1 to C4 are sent to the operation status monitoring device 130. However, one to three types or five or more types may be used.

For connection between the signal cables 205a-205d and the signal cables 206a-206d, normal soldering or connectors may be used. In the first embodiment, the clamp-type AC

current sensors

207a, 207b, 207c, Use 207d. The clamp-type AC current sensor sandwiches a signal cable (here, signal cables 205a to 205d) at a clamp portion of the AC current sensor, and outputs a signal change (turn-on and turn-off of a pulse signal) detected by these AC current sensors. It is a sensor. By using the AC current sensors 207a-207d, the control signals of these signal cables 205a-205d can be transmitted to the signal cables 206a-206d without disconnecting the signal cables 205a-205d (ie, without modifying the NC machine tool 120). Can be output. As a clamp type alternating current sensor, for example, one described in Japanese Patent Application No. 2016-040321 is known.

Further, the CPU 201 has a function of transmitting desired information as print information P to the print interface 204. As is well known, an NC machine tool has a function of outputting detection values of various sensors (not shown in FIG. 2) provided in the NC machine tool as print information (that is, detection values of various sensors in a control program). And the like which include a command for converting the information into print information and outputting it, and having a function of causing the CPU 201 to execute the command. In such an NC machine tool, it is possible to output print information for causing a printer to print predetermined character information (comments) using the print function. That is, a command for outputting predetermined character information as print information can be described in the control program and executed by the CPU 201. In the first embodiment, using such a printing function, the CPU 201 outputs character information indicating the type of workpiece and the progress stage of the manufacturing process. For example, at the start of machining, the name of the object to be machined is output as print information, and then "machining start", "cutting is completed XX%", "until machining is completed", and "tool change work starts" "," Emergency stop process in progress ", etc. can be output.

The print interface 204 outputs the print information input from the CPU 201 to the operation status monitoring apparatus 130. As will be described later, in the first embodiment, such print information is used as information for causing the operating status monitoring apparatus 130 to determine the operating status (described later).

Note that the method of providing character information to the operation status monitoring apparatus 130 is not limited to the method using the printing function of the CPU 201. For example, according to the operating status of the NC machine tool 120, the operator operates the barcode reader to selectively read one of a plurality of types of barcodes, and reads the read barcode information (optical information). A method of converting to character information and sending it to the operation status monitoring apparatus 130 is also possible. According to this method, it is possible to capture character information with only a simple operation of reading a barcode.

FIG. 3 is a block diagram schematically showing a main configuration of the operation status monitoring device 130. As shown in FIG.

As shown in FIG. 3, the operating status monitoring apparatus 130 includes a data acquisition unit 310 and a data storage / determination unit 320.

The data acquisition unit 310 includes a character information acquisition unit 311 and a control signal acquisition unit 312.

The character information acquisition unit 311 takes the print information P from the print interface 204 of the NC machine tool 120 and temporarily stores it. Then, character information is extracted from the print information P and output to the data storage / determination unit 320.

The control signal acquisition unit 312 sequentially receives the control signals C1 to C4 in parallel via the signal cables 206a to 206d of the NC machine tool 120.

When the control signals C 1 -C 4 are first captured, the control signal acquisition unit 312 temporarily stores these control signals C 1 -C 4 in the internal memory and outputs them to the data storage / determination unit 320.

Thereafter, every time the control signal C1-C4 is newly fetched, the control signal acquisition unit 312 compares the value of the control signal C1-C4 with the temporarily stored signal value. If the two do not match, the control signal acquisition unit 312 rewrites the stored value in the internal memory to the newly acquired signal value of the control signal C1-C4 and outputs it to the data storage / determination unit 320. According to such a method, only when the control signal value changes, the control signal value can be sent to the data storage / determination unit 320. As a result, the capacity of the database 322 (described later) can be saved. it can. However, the data may be sent to the data storage / determination unit 320 at a predetermined time interval regardless of whether the control signal value has changed.

The data storage / determination unit 320 includes a control unit 321, a database 322, a determination table storage unit 323, and a display unit 324.

The control unit 321 receives the character information and the signal values of the control signals C1-C4 from the character information acquisition unit 311 and the control signal acquisition unit 312 of the data acquisition unit 310. Then, the time information is added to the received character information and control signal value, and stored in the database 322.

In addition, the control unit 321 determines the operating status of the NC machine tool 120 using the input character information, the signal values of the control signals C1 to C4, and the determination table, and the determination result to the display unit 324. Send (details will be described later).

The determination table is stored in the determination table storage unit 323. As the determination table storage unit 323, for example, a ROM (Read Only Memory), a hard disk, or the like can be used.

As the database 322, for example, a hard disk or the like is used. The database 322 may be configured such that character information and control signal values can be read from a remote terminal using a communication line such as the Internet.

The display unit 324 displays the determination result received from the control unit 321. As the display unit 324, for example, a display device or the like can be used.

Hereinafter, the operation of the NC machining system 100 according to the first embodiment will be described.

First, as described above, NC data is sent from the DNC device 110 to the NC machine tool 120. The NC data may be the same as before.

The NC machine tool 120 performs machining such as cutting using the NC data and the control program. As described above, an instruction for outputting predetermined character information as print information is added to the control program in advance by an administrator of the NC machine tool 120 or the like. Therefore, when this control program is executed, print information P including desired character information is output from the print interface 204 to the operation status monitoring device 130 at a desired timing.

Further, as described above, the control signals C1-C4 are output to the operation status monitoring device 130 via the signal cables 206a-206d.

The operation status monitoring apparatus 130 inputs the print information P and the control signals C1-C4. Then, as described above, the character information acquisition unit 311 and the control signal acquisition unit 312 of the data acquisition unit 310 store the character information extracted from the print information P and the signal values of the control signals C1 to C4 in the data storage / The data is sent to the control unit 321 of the determination unit 320.

Thereafter, the control unit 321 stores the print information P and the control signals C1-C4 in the database 322.

FIG. 4 is a conceptual diagram showing data stored in the database. As shown in FIG. 4, in the database 322, character information and signal values of the control signals C1-C4 are sequentially stored together with time information indicating the storage date and time.

As described above, the control signals C1 to C4 are each a 1-bit or multi-bit signal. In the example of FIG. 4, the total number of bits of the control signals C1-C4 is 8 bits.

Subsequently, the control unit 321 determines the operating status of the NC machine tool 120 using the character information P, the signal values of the control signals C1-C4, and the determination table.

FIG. 5 is a conceptual diagram illustrating an example of a determination table.

For example, the control signal indicating the primary stop or alarm in the control signals C1 to C4 is OFF (ie, indicating that neither the primary stop nor the alarm is activated), and the character information also indicates normal operation (for example, In the case of “machining start” or “cutting is finished XX%”), the control unit 321 obtains a determination result of “normally operating”.

Further, for example, when the control signal indicating the alarm among the control signals C1 to C4 is ON (indicating that the alarm is activated) and the character information is “processing emergency stop”, the control unit 321 Obtains a determination result that “abnormality is occurring”.

The control unit 321 displays the determination result on the display unit 324. At this time, the signal value of the control signals C1-C4 and the character information may be displayed on the display unit 324 simultaneously with the determination result. As the display unit 324, for example, a display device or the like can be used.

As described above, according to the first embodiment, since the operating status can be determined from the combination of the character information and the control signal, the operating status of the NC machine tool 120 can be recorded and determined easily and inexpensively.

Further, according to the first embodiment, the character information and the control signal are sequentially stored in the database, so that the operating status of the NC machine tool 120 can be confirmed afterwards, and the operating status can be confirmed via a communication line. It becomes easy to monitor remotely.

Furthermore, according to the first embodiment, since the character information incorporated in the control program in advance is output using the printing function of the NC machine tool 120, the character information used for the determination of the operation information is automatically Therefore, the burden on the operator is small and the operation of the system is simplified.

In addition, according to the first embodiment, it is possible to easily know the type of workpiece and the progress stage of the manufacturing process, and thus it is possible to monitor the operation status in detail.

DESCRIPTION OF SYMBOLS 100 Machine system 110 Apparatus 120 NC machine tool 130 Operation condition monitoring apparatus 202 Drive part 203 Operation panel 204 Printing interface 205a-205d, 206a-206d Signal cable 207a-207d Clamp type alternating current sensor 310 Data acquisition part 311 Character information acquisition part 312 Control signal acquisition unit 320 determination unit 321 control unit 322 database 323 determination table storage unit 324 display unit

Claims

An operating status monitoring device that monitors the operating status of manufacturing equipment controlled by a computer,
In the manufacturing process, a plurality of types of character information respectively indicating a plurality of predetermined progress stages, a character information acquisition unit that acquires from the outside when the corresponding progress stage is reached,
A control signal acquisition unit for acquiring a control signal output or input by the computer;
Based on the corresponding combination of the character information and the control signal, a determination table for determining the operating status of the manufacturing apparatus in each progress stage;
A control unit for determining the operation status using the determination table;
An operating condition monitoring apparatus comprising:
The database according to claim 1, further comprising a database that sequentially stores the character information acquired by the character information acquisition unit and the control signal acquired by the control signal acquisition unit together with time information. Operation status monitoring device.
The computer has a function of outputting predetermined character information as print information based on an instruction of a control program,
The character information acquisition unit temporarily stores the character information indicated by the print information;
The operation status monitoring apparatus according to claim 1 or 2, wherein
The operation status monitoring apparatus according to claim 1, wherein the character information is information obtained by selectively reading any one of a plurality of types of barcodes by an operator operating a barcode reader. .
The character information indicating the type of product manufactured by the manufacturing apparatus is included as the plurality of character information in addition to the character information indicating the progress of the manufacturing process by the manufacturing apparatus. The operation status monitoring device described in Crab.