JPH07160983A - Monitoring/device for numerically controlled machine tool - Google Patents

Abstract

PURPOSE:To relieve the load of operators for supervision by contriving the monitor of a numerically controlled machine tool so that what degree of fault takes place in which machine tool is immediately and easily grasped in a monitor room even when plural numerical machine tools have abnormalities. CONSTITUTION:An alarm signal from an alarm display device of each numerically controlled machine tool is converted into a user alarm level by an alarm level analysis section 132 and displayed on an alarm display device 124 in a monitor room 1 via an alarm storage/output section 135 in parallel with each numerical control machine tool. Furthermore, a speaker 125 is provided and an alarm is sounded by a controller control section 131.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor device for a numerically controlled machine tool, and is particularly suitable for application to a monitor device for monitoring the operating conditions of a plurality of numerically controlled machine tools in a monitor room.

[0002]

2. Description of the Related Art Japanese Patent Application No. 5-20 previously proposed by the present applicant
In a monitor device for a numerically controlled machine tool according to 8152, a contact signal for driving an alarm indicator provided in each numerically controlled machine tool is extracted and input to the monitor switching control device. Detects an abnormal machine tool with an alarm based on the input contact signal. Then, the monitor switching control device is configured to switch the signal path of the video signal switching selector so that the video signal of the machine tool in which the abnormality has occurred is displayed on the monitor in the monitor room based on the detection result. There is. As a result, when an abnormality occurs in a machine tool, for example, the monitor in the monitor room is switched from the normal sequential monitor screen automatic feed display to automatically display the abnormal monitor screen with priority. As a result, for example, it becomes unnecessary for the monitoring personnel to constantly observe the monitor screen, and it becomes possible to detect an abnormality in the machine tool at an early stage, which reduces the excessive burden on the monitoring personnel. there were.

[0003]

By the way, in the case of such a monitor device, the monitor displayed on the screen of the monitor room displays only the screen of any one of the monitors on the machine tool side. Therefore, for example, when an abnormality occurs in a plurality of machine tools at the same time, only one of the monitor screens of the plurality of machine tools in which an abnormality has occurred is displayed as a priority monitor screen. become.
Therefore, it is possible to immediately recognize that there is an abnormality in one machine tool having a monitoring staff in the monitor room, but it is difficult to immediately recognize that an abnormality has occurred in a plurality of machine tools. At this time, since the alarm display is displayed on the machine tool with the abnormality on the factory side, it is possible to recognize which machine tool and what degree of abnormality has occurred from the monitor room. . However, in reality, these alarm indicators are difficult to see from the monitor room, and in many cases the monitoring personnel are doing other work in the monitor room. Is likely to be delayed.

Further, when the monitor screen of the abnormal machine tool is displayed on the monitor in the monitor room, there is a case where some kind of display indicating that the abnormality has occurred is displayed on the monitor screen. However, even in such a case, if the monitoring personnel perform some work indoors, this display may be overlooked, and it may not be possible to detect the abnormality early.

Further, since the alarm display by the normal alarm display is performed in a plurality of stages (hereinafter referred to as alarm levels) according to the degree of abnormality, the contact signal for driving this is also staged for each alarm display. Multiple types of signals are prepared according to the number. However, in reality, each machine tool is made by a different manufacturer, or even the same manufacturer has different standards, so the format of these contact signals differs for each machine tool. The steps are not unique in common. This means that, for example, when comparing the alarm levels of the same level of multiple machine tools, it does not necessarily indicate the same level of abnormality, and some require comparatively urgent measures, but some require machining for the time being. May not cause any problems. Therefore, for the monitoring personnel, even if an alarm display according to the alarm level is displayed by the alarm display or some kind of display indicating the alarm level is displayed on the monitor device, this is not unique to the monitoring side. In some cases, it is difficult to determine how much abnormality is actually occurring. In particular, as the number of machine tools installed increases, the confusion becomes more serious, which imposes a burden on the monitoring personnel. Therefore, an object of the present invention is to further reduce the burden on a monitoring staff in a monitor device for a numerically controlled machine tool, for example.

[0006]

Therefore, the monitor device for a numerically controlled machine tool according to the present invention can display an alarm based on the first alarm signal which is set stepwise according to the abnormal degree of operation. A plurality of numerically controlled machine tools provided with a first alarm indicator, an alarm signal switching section for selectively selecting and outputting a first alarm signal input from the plurality of numerically controlled machine tools, and at least this A control unit that can perform the required switching control for the alarm signal switching unit and the first alarm signal output from each numerically controlled machine tool is arbitrarily set as the second alarm signal according to its importance. A changeable alarm signal setting section,
The alarm signal storage unit that stores and holds the data of the second alarm signal and the data of the alarm signal storage unit that corresponds to the first alarm signal input from the alarm signal switching unit are read and converted into the second alarm signal. And an alarm signal conversion unit that outputs the alarm signal, and a second alarm indicator that displays an alarm at least for each of the plurality of numerically controlled machine tools based on the second alarm signal input from the alarm signal conversion unit. To construct a monitor device for numerically controlled machine tools.

Further, when the alarm is displayed on the second alarm indicator, the control unit is configured to generate a voice signal indicating an abnormality of the numerically controlled machine tool and output the voice signal from the voice output unit. did.

[0008]

According to the above construction, when a plurality of numerically controlled machine tools have an abnormality, it is possible to recognize which numerically controlled machine tool has an abnormality by the second alarm indicator. At this time, the alarm display is performed based on the alarm level (the importance level of the alarm signal) defined by the user. In addition, since a voice output indicating an abnormality is output, it is possible to immediately recognize that there is an abnormality in the numerically controlled machine tool by this voice.

[0009]

1 shows a numerically controlled machine tool management system having a monitor device for a numerically controlled machine tool according to an embodiment of the present invention. In this figure, the drawing data transmitted by ISDN using a telephone line is
It is stored in the floppy disk (FD) of the FD transfer device 303 installed in the design room 3, and this FD is stored in the CA.
By setting it in the D / CAM device 302, it is read into this device and converted into NC data.

This converted NC data is stored in the monitor room 1
Consisting of a personal computer installed in
The data is transmitted to the C data management system 101 via the optical fiber line 304 and stored in the hard disk. When the stored NC data is transmitted to the machining center 208 via the optical fiber line 113 and to the wire cut electric discharge machines 201-1 to 201-4 via the optical fiber line 112, the machining center 208 and the wire cut electric discharge machine are transmitted. 201-1 to 201-4 are the transmitted N
The C data is stored and the processing is performed according to the NC data.

Note that the NC data can also be created by using the automatic programming device 301 composed of a personal computer or the like. The NC data created by the program device 301 is transmitted to the NC data management system 101 via the optical fiber line 305 and processed in the same manner as the NC data. The NC data management system 101 is composed of a personal computer main body 102 for controlling the system, a monitor 103 for displaying NC data and the like, and a keyboard 104 for inputting data. Further, 106 is a signal switch, which is a keyboard 21 of a terminal provided in the factory 2.
2 is a switching device for switching between a signal transmitted from the optical fiber line 114 through the optical fiber line 114 and a signal from the keyboard of the NC data management system 101 and inputting to the personal computer main body 102.

The factory 2 has, for example, four wire-cut electric discharge machines 201-1 to 201-as numerically controlled machine tools.
Four and one machining centers 208 are provided, and a terminal including a monitor 211 and a keyboard 212 is further provided.

Then, the wire cut electric discharge machine 201-
1 is provided with a monitor 202-1 on which numerical data indicating the machining status and data such as graphs are constantly displayed, and the work state of the wire cut electric discharge machine 201-1 can be grasped by looking at this monitor 202-1. It is designed to be able to do. Further, an isolator 203-1 to which the branched R, G, B image data displayed on the monitor 202-1 is applied is provided. Further, the wire cut electric discharge machine 201-1 is provided with an alarm indicator 204-1 capable of displaying an alarm by a plurality of predetermined alarm levels when an abnormality occurs in the operation. Further, this alarm indicator 204-1 is the drive circuit 2
There is provided an isolator 206 which is driven for display by a contact signal according to the alarm level output from 05-1 and to which the contact signal branched from the drive circuit 205-1 is applied.

Other wire cut electric discharge machine 201-2
21-4 similarly to monitors 202-2 to 202-4
And the isolators 203-2 to 203-2 to which the video signal is supplied
03-4, alarm indicators 204-2 to 204-4 and drive circuits 205-2 to 205-4, and isolators 206-2 to 206-4 to which contact signals are supplied, respectively.

Data such as numerical values and graphs showing the machining status of the machining center 208 are displayed on the monitor 209, and the operating state of the machining center 208 can be grasped by looking at the monitor 209.

By the way, when the keyboard 212 is activated, the machining center 208 in the factory 2
You can edit or create NC data that controls the processing of, and the operation of editing or creating this NC data is
The keyboard 212 is connected to the NC via the optical fiber line 114.
Since it is connected to the personal computer main body 102 of the data management system 101, this personal computer main body 102 arranged in the monitor room is used. In this case, the image data of the monitor 103 is transmitted to the monitor 211 via the isolator 105 and the metallic line 111, and the data necessary for editing or creating the NC data is displayed on the monitor 211.

Therefore, it is sufficient to operate the keyboard 212 while referring to the monitor 211 to edit or create NC data. The NC data edited or created in this way can be transmitted from the personal computer main body 102 to the machining center 208 via the optical fiber line 113.

Next, the NC machine monitoring system in this embodiment will be described. This NC machine monitoring system
The monitor 109, the isolator 108, the controller 107, and the alarm display device 12 provided in the monitor room 1
4, a speaker 125, and a switching selector 120 (image switch unit 121, alarm switch unit 122, switch control unit 123) installed on the factory 2 side.

First, the image signals displayed on the monitors 202-1 to 202-4 provided in the wire-cut electric discharge machines 201-1 to 201-4 on the factory 2 side are branched, and the isolators 203 are respectively provided. -1 to 203
Metallic lines 207-1 and 20-2 shown by a broken line through -4
07-4 is applied. This metallic track 207
The image data transmitted via -1 to 207-4 are input to the image switch unit 121 in the switching selector 120, respectively. The image data displayed on the monitor 209 of the machining center 208 is also branched and supplied to the isolator 210.
The image data output from 0 is the metallic line 207-
The image switch unit 1 in the switching selector 120 via
21 is input. And this image switch unit 1
One of the image data signals input to the switch 21 is selected based on the operation of the switch control unit 123 described later, and one of the selected inputs is the controller 10 on the monitor room 1 side.
It is output to the isolator 108 via 7.

The video signal output from the isolator 108 is supplied to the monitor 109 so that the monitor image of any one of the wire cut electric discharge machines 201-1 to 201-4 and the machining center 208 is displayed on the monitor 109. become.

Next, in the alarm switch section 122 of the switching selector 120, the drive circuit 205-of each alarm indicator
The contact signals branched from 1 to 205 to 4 are the isolator 206-1 to 206-4 and the transmission lines 208-1 to 20.
8-4 is input. Then, each of these contact signals is also selected based on the control of the switch control unit 123 described later, and one of the selected contact signals is input to the controller 107.

Further, reference numeral 124 provided on the monitor room 1 side indicates an alarm display device for comprehensively displaying the abnormality of each wire cut electric discharge machine. This alarm display device 1
Reference numeral 124a provided in 24 is a display lamp, which is composed of, for example, LEDs capable of emitting light of a plurality of colors, and at least a number corresponding to each wire cut electric discharge machine is provided. Under the control of the controller 107, the alarm display device 124 drives a display lamp corresponding to the wire cut electric discharge machine in which an abnormality has occurred by a method such as a color, lighting, blinking or the like according to the alarm level. The alarm level shown here is a user alarm level that can be set in advance by a user (monitoring staff), which will be described later. Further, the display method is not limited to the above method, and it is sufficient that the abnormality of each wire cut electric discharge machine can be displayed according to the alarm level.

Reference numeral 125 denotes a speaker, which reproduces the audio signal output from the controller 107 and informs by sound of an abnormality of each wire cut electric discharge machine.

In the machine tool monitoring system of the above construction, the isolator is provided at the entrance or exit of the transmission line because the factory 2 is full of noise generated by the machine tool, especially from the wire cut electric discharge machine. Since intense electromagnetic wave noise is output, such noise is transmitted to the transmission line and this noise flows back into the machine tool and is input to the machine tool, adversely affecting the control circuit in the machine tool. This is because there is a risk of damaging the workers and causing danger to workers. That is, the isolator shuts out the noise propagating through the transmission line at the end of the transmission line and prevents the noise from flowing into the inside.

Next, FIG. 2 shows the details of the NC machine monitoring system in the monitor room 1 and the factory 2. In this figure, the monitor 10 of the configuration shown in FIG.
9, the isolator 108, the controller 107, the switching selector 120 (the image switch unit 121, the alarm switch unit 122, the switch control unit 123), the alarm display device 124, and the speaker 125 are extracted and shown, and the wire cut electric discharge machining on the factory 2 side is also shown. Machines 201-1 to 201-4
Also, the machining center 205 is shown in a simplified manner. Although the isolator provided at the entrance or exit of each transmission line is omitted for convenience, it is actually provided as shown in FIG.

As shown in this figure, first, the switching selector 12
0 is an image switch unit 121 and an alarm switch unit 12
2. The switch control unit 123. The image switch unit 121 is provided with terminals T _{1 to} T ₆ , and the terminal T ₆ is selectively switched to the other terminals T _{1 to} T ₅ . The terminals T _{1 to} T ₄ are connected to the monitors 202- of the wire-cut electric discharge machines 201-1 to 201-4.
1 to 202-4 are respectively connected to video signal outputs branched, and a terminal T ₅ is connected to a monitor 209 of the machining center.
It is connected to the video signal output branched from. Terminal T
Reference numeral ₆ is connected to the video signal input of the monitor 109 via the controller 107. As a result, one of the wire-cut electric discharge machines 201-1 to 201-4 or the monitor screen of the machining center is supplied to the monitor 109.

The alarm switch unit 122 has a T ₁₁
The terminals T ₁₅ to T ₁₅ are provided. In this case, the terminal T ₁₅
There switched As an alternative to the terminal T ₁₁ through T _14, or an open state which is not connected to any terminal. The terminal T ₁₅ is connected to the input of the alarm level analysis unit 133 on the controller 107 side, and the terminals T _{11 to} T _{14 are} also connected.
The contact signals output from the respective drive circuits 205-2 to 205-4 of the wire cut electric discharge machines 201-1 to 201-4 are input as alarm signals. In addition,
These alarm signals are also branched and input to the switch control unit 133.

The switch control section 133 outputs a control signal for switching the terminals to each of the image switch section 121 and the alarm switch section 122. Further, it is also possible to perform manual switching according to the operation input of the monitoring personnel. Further, as described above, since each alarm signal is branched and input, it is also possible to detect the presence or absence of the alarm signal output of each wire cut electric discharge machine, for example.

Next, the controller 107 uses the switching selector 1
The control unit 20 controls the alarm display and voice output of the display 20, the display 124, and the speaker 125. The controller 107 includes a controller control unit 131, an alarm level analysis unit 132, and an alarm initial setting / storage unit 13.
3, a backup power supply 134, and an alarm data storage / output unit 135.

In the controller 107, the controller control unit 131 controls the operation of each functional circuit unit in the controller 107 and the switch control unit 123 of the switching selector 120. For example, in the alarm level analysis unit 132 described below. Instructions for converting to a user alarm level based on analysis of an alarm signal, instructions for setting / storing input in the alarm initial setting / storing unit 133, switching of various operation modes in the switching selector 120, monitoring image switching speed, and the like. You can Further, a voice signal indicating an alarm is generated and the speaker 125 outputs the voice.

The alarm initial setting / storage unit 133 stores and holds the alarm level initial setting defined by the user and its setting data, and is constituted by, for example, a RAM or the like. As described above, the degree of abnormality indicated stepwise by the alarm level of the alarm signal (contact signal) differs for each wire cut electric discharge machine.
In other words, the correspondence between the alarm level set on the wire cut electric discharge machine side and the specific degree of abnormality does not always match the user's convenience and usage conditions. Therefore,
The alarm initial setting / storage unit 133 has a predetermined number of alarm levels (user alarm levels) provided for the user to set, and the user alarm level is set in advance when using the monitoring system of the present embodiment. , The alarm level on each wire cut electric discharge machine side is arbitrarily assigned, and this is held as data. For example, as shown in FIG. 3, the user alarm level is set to three levels from level A to C in descending order of severity of abnormality, and in a certain wire-cut electric discharge machine, the alarm level is from level 1 to level 6. Assuming that there are 6 levels, the user assigns the alarm level 1 of the wire cut electric discharge machine to the user alarm level A and the user alarm level B to the user alarm level A as shown in the figure, for example. Can be assigned alarm levels 2 and 3, and user alarm level C can be assigned alarm levels 4, 5 and 6, and can be held in the alarm initial setting / storage unit 133 as data. Then, similarly to all the other wire-cut electric discharge machines, it is possible to arbitrarily perform the initial setting and store the same. Although not shown, the input operation of the initial setting may be performed by connecting an operation key or the like capable of inputting the initial setting to the controller control unit 131. Alternatively, the keyboard 104 can be used by connecting the personal computer NC management system 101 and the controller 107. The backup power supply 134 is used to hold the stored data in the alarm initial setting / storage unit 133, but is omitted when a nonvolatile RAM is used for the alarm initial setting / storage unit 133, for example.

The alarm signal selected by the alarm switch unit 122 is input to the alarm level analysis unit 132. Then, the alarm level analysis unit 132 discriminates the wire cut electric discharge machine of the alarm signal currently input based on the switching data of the alarm switch unit of the controller control unit 131. Then, the initial setting data of the user alarm level of the corresponding wire cut electric discharge machine is called from the alarm initial setting / storage unit 133, the alarm level of the input alarm signal is converted into the user alarm level, and the alarm data is stored / output. It is output to the unit 135.

The alarm data storage / output unit 135 temporarily stores in parallel the alarm signal converted into the user alarm level by the alarm level analysis unit 132 for each corresponding wire cut electric discharge machine, and displays based on this alarm signal. An alarm display device 124 displays the lamp drive signal.
Is output to the required display lamp 124a.

As described with reference to FIG. 1, the alarm display device 124 is provided with at least the number of display lamps 124a corresponding to each wire cut electric discharge machine. Then, the display according to the user alarm level set for each wire cut electric discharge machine is possible. For example, as an example of performing stepwise display according to the alarm level, for example, an LED in which red and green LEDs are integrated is used as each display lamp 124a. In this case, the display can be realized by displaying orange in the case of, lighting green in the case of level C, and not lighting in the case of no abnormality. Note that this is merely an example, and it is also possible to provide a plurality of LED elements of different colors or to use various display devices capable of display display or dot matrix display without being limited to lamp display.

Then, the operation of the monitor device of the numerically controlled machine tool having the above configuration will be described. For example, during normal monitoring, the monitor images are set to the sequential feed mode. In this case, the controller control unit 131 is the switch control unit 1
23 to control the terminals T _{1 to} T ₅ of the image switch unit 121.
Is switched so as to be connected to the terminal T ₆ every predetermined time set, so that the monitor images of the wire-cut electric discharge machines 201-1 to 201-4 and the machining center 205 are displayed on the monitor 109 every predetermined time. To be done. At this time, the alarm switch unit 122 may be switched in conjunction with the image switch unit 121. For example, when the terminal connected to the terminal T ₆ of the image switch unit 121 is switched to T _{1 to} T ₄ , the terminal connected to the terminal T ₁₆ of the alarm switch unit 122 is switched to T _{11 to} T ₁₄ . . An alarm signal is sent from the machining center 209 to the alarm switch unit 1
Since it is not supplied to the alarm switch 22, the alarm switch unit 122 may be opened when the terminals T ₅ and T _{6 of} the image switch unit 121 are connected. In this case, since no abnormality has occurred in each machine tool on the factory 2 side, the alarm switch unit 122
Does not output an alarm signal. Therefore, the alarm display device 124 does not display an alarm,
No audio output indicating an alarm is output from the speaker 125. During this time, the switch control unit 123 discriminates an abnormality that occurs on the side of each wire cut electric discharge machine based on a contact signal (alarm signal) branched and input from each drive circuit.

Here, for example, the wire cut electric discharge machine 2
It is assumed that an abnormality occurs in both 01-1 and the wire-cut electric discharge machine 201-2, that is, a situation occurs in which a plurality of wire-cut electric discharge machines have an abnormality at the same time. Then, the wire-cut electric discharge machine 201-1
Then, the drive circuit 205-1 gives an alarm indicator of a level according to the degree of abnormality at the alarm indicator 204-1 and the contact signal of the drive circuit 205-1 is an alarm signal at the terminal T of the alarm display device 121. Supplied to ₁ . Also, in the wire cut electric discharge machine 201-2, an alarm display is made by the alarm display 204-2, and the contact signal of the drive circuit 205-2 is supplied to the terminal T ₂ of the alarm display device 121 as an alarm signal. In addition, these alarm signals are branched to switch control unit 1
Since it is also supplied to 23, the switch control unit 123 detects that an alarm signal has been obtained in the wire cut electric discharge machine 201-1 and the wire cut electric discharge machine 201-2, that is, some abnormality has occurred. It Also,
This data is also transmitted to the controller control unit 131.

Based on this, the switch control section 123 outputs a control signal to, for example, the image switch section, and the terminal T ₆
Is connected to either terminal T ₁ or terminal T ₂ . At this time, it is possible to consider which of the terminal T ₁ and the terminal T ₂ to switch to, such as determining the terminal to be prioritized based on the alarm level. Also, terminal T ₁ terminal T
It is also conceivable to switch ₂ at regular intervals. As a result, the wire-cut electric discharge machine 201-1 and the wire-cut electric discharge machine 201-2 in which an abnormality has occurred
One of the monitor screens is displayed.

Further, the switch control section 123 controls the switching so that the terminal T ₁₅ is connected to the terminals T ₁₁ and T ₁₂ at a predetermined timing in the alarm switch section 122. Then, when the terminal T ₁₁ is connected to the terminal T ₁₅ , the alarm signal of the wire cut electric discharge machine 201-1 is transmitted to the alarm switch unit 122.
Will be input to the alarm level analysis unit 132 via. The alarm level analysis unit 132 converts the input alarm signal into an alarm signal of the user alarm level of the wire cut electric discharge machine 201-1 held in the alarm initial setting / storage unit 133 as described above and outputs an alarm. It is supplied to the data storage / output unit 135. The alarm data storage / output unit 135 holds the input alarm signal in association with the wire cut electric discharge machine 201-1 and outputs a display lamp drive signal corresponding to the user alarm level of the held alarm signal. Accordingly, in the alarm display device 124, the display lamp 1 corresponding to the wire cut electric discharge machine 201-1 is displayed.
24a is turned on according to the user alarm level.

Further, when the terminal T ₁₂ is connected to the terminal T ₁₅ , the wire cut electric discharge machine 20
The 1-2 alarm signal is input to the alarm level analysis unit 132 via the alarm switch unit 122. Therefore, in this case, in the same manner as above, the alarm display corresponding to the converted user alarm level is lit on the display lamp 124a of the alarm display device 124 at a position corresponding to the wire cut electric discharge machine 201-2. .

Since the above operation is processed at a relatively high speed,
Actually, at almost the same time, the alarm display device 124 displays an indication that an abnormality has occurred in the wire cut electric discharge machine 201-1 and the wire cut electric discharge machine 201-2.

Further, at this time, the controller control section 131 outputs a voice output from the speaker 125 to indicate that an abnormality has occurred in the machine tool. It should be noted that various sound output forms are conceivable. For example, when an alarm sound is output by a buzzer sound or the like, a change according to the user alarm level is given depending on the intermittent sound, the strength, the type of sound, the scale, etc. It is also possible. Further, with the above combination, when an abnormality occurs in a plurality of machine tools, it is possible to express which machine tool shows the abnormality at which level. In addition, the controller control unit 1
It is also conceivable to provide a voice synthesizer or the like at 31 and express information regarding abnormality of the machine tool by voice. further,
Video signal input to monitor 109 and speaker 125
The voice signal input to can be branched to the modem output as shown by the one-dot chain line and the broken line in the figure, so that it is possible to know the abnormality of the machine tool at a remote place by, for example, a pager. .

By configuring the monitor device of the numerically controlled machine tool to operate as described above, the monitoring staff can stay in the monitor room 1 even if abnormalities occur in a plurality of machine tools at the same time. Thus, it is possible to surely recognize which machine tool has an abnormality. Further, even when the monitoring device 109 and the alarm display device 124 in the monitor room 1 are not paying attention to the monitoring personnel, at least some abnormality is to be notified by voice. By doing so, it is possible to recognize that an abnormality has occurred in the machine tool.

The configuration of the monitor device of the numerically controlled machine tool described with reference to FIGS. 1 and 2 is an example and can be changed. For example, instead of the metallic cable used as the transmission line, an optical fiber line or wireless communication using infrared rays can be used. Also,
Generally, a relay that is not easily affected by noise is suitable for the switches such as the image switch unit 121 and the alarm switch unit, but an electronic switch including a thyristor and a transistor can also be used. In addition to the above-described alarm initial setting, various instruction operations such as switching mode setting of the switch control unit 123 can be performed by connecting the personal computer NC management system 101 and the controller 107.
It is also possible to configure so as to do in 04. Also, N
C machine monitoring system and NC data management system 101,
Connect the CAD / CAM device 302 in the design room 3 or the personal computer automatic program 301 etc. to display the monitor screen of the machine tool on the monitor of these systems, or the controller 1
It is also possible to input various instructions to 07 and the switching selector 120.

[0044]

Since the present invention is configured as described above, the alarm display device in the monitor room can be used for any machine tool even if there are abnormalities in a plurality of machine tools. It is possible for the monitoring personnel to immediately judge whether or not any abnormalities have occurred and the degree of these abnormalities (alarm level). In this case also, it is displayed as the information converted into the alarm level suitable for the user's usage environment. Therefore, it becomes easier to understand the situation regarding abnormality of the machine tool. Also, for example, even when the monitoring staff is engaged in work other than the monitoring of the machine tool in the monitor room, an alarm is generated by the voice output, so that it is not overlooked to detect the abnormality. As described above, the monitor device for a numerically controlled machine tool according to the present invention has the effect of significantly reducing the burden on the monitoring staff.

[Brief description of drawings]

FIG. 1 is a diagram showing a monitor device for a numerically controlled machine tool that is an embodiment of the present invention.

FIG. 2 is a switching selector, controller, and
It is a figure which shows a part such as an alarm display device and a speaker.

FIG. 3 is an explanatory diagram showing an alarm initial setting.

[Explanation of symbols]

1 Monitor Room 2 Factory 3 Design Room 101 Data Management System 102 Personal Computer Main Body 103, 109 Monitor 104, 209 Keyboard 105, 108, Isolator 106 Switch 107 Controller 112, 113, 114, 304, 305 Optical Fiber Line 120 Switch Selector 121 image switch unit 122 alarm switch unit 123 switch control unit 124 alarm display device 125 speaker 131 controller control unit 132 alarm level analysis unit 133 alarm initial setting / storage unit 134 backup power supply 135 alarm data storage / output unit 201-1 to 201- 4 Wire cut electric discharge machine 202-1 to 202-4 Monitor of wire cut electric discharge machine 203-1 to 203-4 Isolation of wire cut electric discharge machine 204-1 to 204-4 Alarm indicator 205-1 to 205-4 Driving circuit 206-1 to 206-4 Alarm indicator isolator 208 Machining center 209 Machining center monitor 210 Machining center isolator 301 Automatic programming device 302 CAD / CAM device 303 FD transfer device

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masamitsu Sasaki 629 Oshiba, Mobara-shi, Chiba Futaba Electronics Co., Ltd.

Claims (2)

[Claims] 1. A plurality of numerically controlled machine tools comprising a first alarm display capable of displaying an alarm based on a first alarm signal which is set stepwise according to an abnormal degree of operation, and the plurality of numerically controlled machine tools. An alarm signal switching section capable of selectively selecting and outputting the first alarm signal input from the numerically controlled machine tool; and a required switching control for at least the alarm signal switching section. A control unit capable of changing the first alarm signal output from each of the numerically controlled machine tools to a new second alarm signal according to its importance; An alarm signal storage unit that stores and holds the data of the second alarm signal whose setting has been changed, and the first alarm signal input from the alarm signal switching unit. An alarm signal conversion unit capable of reading the corresponding data from the alarm signal storage unit, converting the data into a second alarm signal and outputting the second alarm signal; and a second alarm signal input from the alarm signal conversion unit, A monitor device for a numerically controlled machine tool, comprising: a second alarm indicator capable of displaying an alarm for each of the plurality of numerically controlled machine tools. 2. The control unit is configured to generate an audio signal indicating an abnormality of the numerically controlled machine tool and output the audio signal from the audio output unit when an alarm is displayed on the second alarm indicator. The numerically controlled machine tool according to claim 1, wherein: