JP2004334507A - Maintenance management device for machine tool, and maintenance management system for machine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maintenance management device for a machine tool that can provide such management as encourages a user to receive maintenance at given intervals even if a machine tool is a used one. <P>SOLUTION: A numerical controller transmits information unique to a controlled machine tool, information unique to a user who uses the machine tool and operation information on the machine tool to a management center via a public communication line, and the management center registers the transmitted information. The management center determines execution timing of maintenance of the machine tool according to the operation information, and notifies the timing to the numerical controller to advise the user about maintenance execution. When the execution timing is transmitted, the numerical controller displays the information on an LCD to notify it to the user. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a maintenance management device and a maintenance management system for managing maintenance performed on a machine tool.
[0002]
[Prior art]
Generally, the environment in which a machine tool is used is extremely severe for the machine, and regular maintenance is indispensable to maintain the state of the machine tool as good as possible. However, users who use machine tools tend to neglect maintenance, and when the machine tool is continuously operated, it breaks down, and when it becomes unusable, it contacts the manufacturer's service person for the first time. In many cases, the customer is requested to repair the malfunction.
[0003]
Then, the user is upset by the failure of the machine tool that occurred at an unexpected timing, and requests the manufacturer to “repair as soon as possible” anyway. . Further, at the time of receiving the notification, the manufacturer does not always have stock of parts necessary for repair. Therefore, the burden on the maker side to deal with it also becomes heavy.
[0004]
In order to prevent such a situation from occurring, for example, it is desirable that the manufacturer consults the user at an appropriate time and recommends that the user perform maintenance. The user who has purchased a new machine tool is usually registered with the manufacturer at that time, so that the above-described user management can be easily performed.
[0005]
However, with regard to machine tools, there are many users who purchase and use second-hand goods. In general, manufacturers rarely know user information on used products. Therefore, the maker who has been notified of the occurrence of a failure in such a situation starts working from the point of accurately grasping information such as the model number of the machine tool and information of the user who is using the machine from that point. Under these circumstances, the user efficiency of the machine tool often falls into a state of extremely poor work efficiency.
[0006]
For example, in Japanese Patent Application Laid-Open No. H11-163, data on the operating state of a machine tool is sequentially stored, communication is started when the power is turned on, and the stored movable state data is transmitted to a predetermined communication destination. Is disclosed.
[0007]
Japanese Patent Application Laid-Open No. H11-163,097 discloses a method in which when a trouble occurs in a machine tool, the failure information is transmitted to a service center, and maintenance information corresponding to the failure information is returned from the service center to the user. There is disclosed a technology that allows a reply destination to be arbitrarily specified.
[0008]
[Patent Document 1]
JP-A-2002-23815
[0009]
[Patent Document 2]
JP-A-2002-351518
[0010]
[Problems to be solved by the invention]
However, the technique disclosed in Patent Literature 1 focuses on the management side to grasp the operation status of the machine tool, and it is presumed that information and the like unique to the machine tool are known. You. Therefore, the method cannot be applied to a device such as a second-hand product that cannot be grasped by the manufacturer or information unique to the user.
In addition, the technique disclosed in Patent Literature 2 is for coping at the stage when a failure has occurred in a machine tool, and cannot solve the above-mentioned problem relating to a used product as in Patent Literature 1. .
[0011]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a machine tool that can be managed so as to prompt a user to perform maintenance at predetermined intervals even if the machine tool is a used product. An object of the present invention is to provide a maintenance management device and a maintenance management system for a machine tool.
[0012]
[Means for Solving the Problems]
To achieve the above object, a maintenance management device for a machine tool according to claim 1, wherein operation information storage means for storing operation information according to a case where the machine tool is operated,
Determining means for determining when to perform maintenance on the machine tool based on the operation information;
When the maintenance time is determined by the determining means, a notifying means for notifying the user is provided.
[0013]
According to this configuration, when it is time to perform maintenance by operating the machine tool for a predetermined time, the maintenance management device notifies the user of the fact. Therefore, for example, even if the manufacturer does not know the information specific to the device and the user because the machine tool is second-hand, and the manufacturer cannot actively perform maintenance management, the user is notified of the maintenance. It can encourage execution.
[0014]
In this case, as described in claim 2, when maintenance is performed on the machine tool, a maintenance information input unit for inputting information regarding the maintenance is provided.
The determination means may be configured to determine the maintenance time in consideration of the maintenance information.
[0015]
That is, when the maintenance of the machine tool is performed, various parts are repaired or replaced as necessary, so that the next maintenance time for the subsequent operation state naturally changes. Therefore, if the next maintenance time is determined in consideration of what kind of maintenance has been performed this time, a more appropriate time can be determined.
[0016]
Further, as described in claim 3, the operation information storage means is configured to store the operation information of the machine tool in each of a cumulative storage area and a temporary storage area,
It is preferable to include an information changing unit for changing the storage content of the temporary storage area when maintenance is performed on the machine tool.
[0017]
With this configuration, when maintenance is performed, only the operation information stored in the temporary storage area can be changed by the information changing unit, and the operation information stored in the accumulation storage area remains unchanged. The operation information from the time when the use of the first time is started is retained.
[0018]
Therefore, the determination means determines the timing based on the operation information stored in the temporary storage area for maintenance to be performed at relatively short intervals, and determines the cumulative storage area for maintenance to be performed at relatively long intervals. Can be determined based on the operation information stored in the.
[0019]
The maintenance management system for a machine tool according to claim 4, wherein the storage means stores machine information unique to the machine tool, an input means for inputting information unique to a user who uses the machine tool, and Operating information storage means for storing operating information in accordance with the case of operation; transmitting the machine information and the user information to the outside via a communication network; and transmitting the operating information to the outside at predetermined intervals. A machine tool maintenance management device comprising communication means;
A registration unit that receives and registers information transmitted from the maintenance management device via the communication network; and a determination unit that determines a time at which maintenance of the machine tool should be performed based on the operation information. And a management center.
[0020]
With this configuration, the management center can easily grasp not only the new product but also the unique information of the machine tool and the information of the user who uses the machine tool, even if it is a used product. Therefore, the management side can easily make a maintenance recommendation to the user at the maintenance time determined by the determination means based on the grasped information, and the user side can provide support for the machine tool. It becomes easy to receive.
[0021]
In this case, as described in claim 5, when the timing is determined by the determination unit, the management center transmits a maintenance execution timing to the maintenance management device via the communication network,
When the execution time is transmitted to the maintenance management device, the maintenance management device may include a notification unit for notifying the user of the information. With this configuration, the user can grasp the maintenance execution time transmitted from the management center side by notification from the maintenance management device, and the maintenance can be performed more smoothly.
[0022]
Further, as described in claim 6, the maintenance management device includes:
When maintenance is performed on the machine tool, the maintenance tool includes a maintenance information input unit for inputting information about the maintenance,
The communication unit is configured to transmit the maintenance information to the outside via the communication network,
The determination means of the management center may determine the maintenance time in consideration of the maintenance information.
With this configuration, the same operation and effect as in claim 2 can be obtained for the determination means of the management center in the maintenance management system according to claim 4 or 5.
[0023]
Furthermore, as described in claim 7, the maintenance management device is
The operation information storage means is configured to store operation information of the machine tool in each of a cumulative storage area and a temporary storage area,
An information change unit for changing the storage content of the temporary storage area when maintenance of the machine tool is performed may be provided.
With such a configuration, the same operation and effect as those of the third aspect can be obtained for the determination means of the management center in the maintenance management system of the fourth to sixth aspects.
[0024]
BEST MODE FOR CARRYING OUT THE INVENTION
(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a functional block diagram showing a configuration of a maintenance management system centered on the numerical control device of the present invention. The numerical control device (maintenance management device) 1 includes an arithmetic device (notification device, operation information storage device) 2, a monitor device 3, a communication control device 4, a temporary storage device (operation information storage device) 5, an initial value storage device 6, It comprises a graphic device 7, a communication interface 8, an LCD (notifying means) 9, and the like.
[0025]
The arithmetic device 2 includes at least one CPU, ROM, and RAM. The ROM stores a program for inputting user information described later. The arithmetic unit 2 mainly performs an interpolation operation by decoding an input numerical control program. Then, based on the calculation result, control information obtained from the machine 11 of the machine tool via the I / O 10, and the like, a drive command signal is output to the motor 13 which is an actuator of the machine tool via the operation control device 12. .
[0026]
The monitor device 3 acquires detection signals from a plurality of detectors relating to the operating state provided in the main machine 11 of the machine tool and peripheral devices. Then, based on the detection values of the respective detection signals, the data in the operating state is analyzed in accordance with the type, and when transmitting the data, the data is converted into data that can be received by the receiving side. The monitor device 3 also acquires the data of the operation state of the numerical control device 1 itself from the arithmetic device 2 and similarly analyzes the data or converts the data into a predetermined form. Then, the monitor device 3 records the data of the operating state in the temporary storage device 5.
[0027]
Even when the power supply of the numerical control device 1 is not turned on, the temporary storage device 5 stores a large number of types of operating state data already acquired and stored from the numerical control device 1 and the machine tool in a time-series manner. keeping. Then, when the power of the numerical controller 1 is turned on again, it can be called in a timely manner.
[0028]
When the operator inputs an instruction from an input unit such as a key or a mouse of an input device (maintenance information input unit, information change unit) 14, the arithmetic unit 2 calls up the data of the operating state from the temporary storage device 5 and It is displayed on the screen of the LCD 9 in a predetermined display form. Further, when instructed by the initial setting, the monitor device 3 continues to send some kinds of operation state data to the graphic device 7 and displays the operation state as the latest information on the screen of the LCD 9. ing.
[0029]
The communication control device (communication means) 4 is a computer device having an IP address registered in the initial value storage device 6 in advance after the arithmetic device 2 activates a communication program based on a user's input operation. That is, a communication request is made to the server of the management center 15 via a public communication line (including a communication network such as the Internet) 16. The management center (registration means, judgment means) 15 is operated by a machine tool manufacturer to provide user support.
[0030]
In the initial value storage device 6, a telephone number for using the public communication line 16, an IP address assigned to the numerical control device 1, and an IP address of a server of the management center 15, which is a communication destination, are stored in advance. . Further, as shown in FIG. 2A, the initial value storage device (storage means) 6 stores machine information which is information unique to the machine tool. The machine information includes items such as a model, a mechanism, a version, a parameter, an operation time, and a cutting time.
[0031]
Next, the operation of the present embodiment will be described with reference to FIGS. FIG. 1 is a flowchart mainly showing the control contents of the arithmetic device 2 when the user activates the registration program and performs the information registration process on the server of the management center 15. The user inputs information items to be registered in the management center 15 according to the information registration screen displayed on the LCD 9 (step S1).
[0032]
Here, an example of a user-specific information item to be registered is shown in FIG. The user information includes a company name, a representative name, a location, a telephone number, a mail address, a use start date of a machine tool, a processing type, and the like.
[0033]
Then, when the user instructs execution of transmission (step S2), the arithmetic unit 2 checks whether or not the user has input all necessary items (step S3), and when all the items have been input ("YES"). Move to step S5. If there is any omission of information items in step S3 ("NO"), an instruction is given to LCD 9 that re-input is necessary (step S4), and the process returns to step S1.
[0034]
In step S5, the arithmetic unit 2 reads out the machine information stored in the initial value storage device 6. Then, the user information and the machine information (data) are transmitted to the management center 15 as the transmission destination stored in the initial value storage device 6 (step S6).
[0035]
Then, the arithmetic unit 2 determines whether or not the transmission is successful (step S7), and determines whether or not the transmission time-out occurs until the transmission is determined to be successful (“NO”) (step S8). . Until the timeout occurs ("NO"), the process returns to step S6 to continue the transmission. Then, when the transmission is successful (step S7, "YES"), the registration process is terminated. If the transmission time has timed out in step S8 ("YES"), a message indicating that the transmission has failed is displayed on the LCD 9 (step S8), and the registration process ends.
[0036]
The management center 15 to which the user information and the machine information have been transmitted from the numerical controller 1 writes and registers the information in a storage device (not shown) when receiving the information. Then, each user is managed based on the registered information.
[0037]
FIG. 4 shows an example of the operation information items of the machine tool stored in the primary storage device 5 of the numerical control device 1. The operation information includes, for example, “operation time”, “tool exchange count”, “feed axis moving distance”, “coolant usage count”,.
[0038]
FIG. 5 shows a memory image of the primary storage device 5. The primary storage device 5 has two storage areas, an accumulation storage area 17 and a primary storage area 18, and the operation information is simultaneously written to these two storage areas 17 and 18. The cumulative storage area 17 is not cleared, and stores cumulative operation information from the time when the use of the machine tool is first started. On the other hand, the contents of the primary storage area 18 are erased after the maintenance of the machine tool is performed as described later, and short-term operation information between the maintenance execution points is stored.
[0039]
FIG. 7 is a sequence showing a process performed between the numerical control device 1 and the management center 15 when the machine tool is normally operated after the user registration process in FIG. 1 is performed. The numerical control device 1 acquires operation information from the machine tool side, and stores the information in the primary storage device 5. When the operation is completed, the operation information is transmitted together with the machine tool and / or user-specific information. Then, the management center 15 stores the transmitted operation information in its own storage device.
[0040]
If the management center 15 determines that it is time to perform maintenance on the machine tool by referring to the operation information while repeating the above processing, the management center 15 transmits the maintenance execution time to the numerical controller 1. Then, the user is advised to receive maintenance of the machine tool. Upon receiving the transmitted execution time information, the numerical control device 1 notifies the user by displaying it on the LCD 9.
[0041]
Thereafter, the user performs a maintenance on the machine tool by requesting the manufacturer to perform the maintenance, and when the user inputs the maintenance execution information from the input device 14, the numerical controller 1 transmits the maintenance information to the management center 15. I do. Here, FIG. 6 shows an example of the maintenance information. The maintenance information includes items such as “date of implementation”, “lubricant oil exchange”, “motor exchange”, “bearing exchange”, “filter exchange”, and so on. Items with circles indicate that replacement has been performed by this maintenance.
[0042]
The management center 15 stores the transmitted maintenance information in the storage device. Then, when determining the maintenance execution time after the next time, the determination is made by also referring to the maintenance information.
[0043]
In addition, when the maintenance is performed, the numerical controller 1 deletes the contents of the primary storage area 17 of the primary storage 5 when the execution information is input. Then, the operation information after the maintenance is performed is stored in the primary storage area 17.
[0044]
As described above, according to the present embodiment, the numerical controller 1 converts information specific to a machine tool to be controlled, information unique to a user who uses the machine tool, and operation information of the machine tool into a public communication line. The information is transmitted to the management center 15 via the management server 16, and the management center 15 registers the transmitted information. Accordingly, the management center 15 can easily grasp not only the case where the machine tool is new, but also the machine tool unique information and the user information even if the machine tool is a used product.
[0045]
Then, the maker on the management side can easily make a maintenance recommendation to the user based on the grasped information, and the user can easily receive support for the machine tool. As a result, it is possible to prevent a serious failure from occurring in the machine tool, so that total user management can be performed efficiently and at low cost.
[0046]
Further, according to the present embodiment, the management center 15 determines the time when the maintenance of the machine tool should be performed based on the operation information, and notifies the numerical control device 1 of the time to perform the maintenance to the user. When the execution time is transmitted, the numerical control device 1 displays the information on the LCD 9 to notify the user. Therefore, the user can recognize the recommendation for the maintenance performed by the management center 15 by the notification, and the maintenance can be performed more smoothly.
[0047]
Further, the numerical controller 1 performs maintenance on the machine tool, and when information on the maintenance is input, transmits the maintenance information to the management center 15, and the management center 15 considers the subsequent maintenance execution time in consideration of the maintenance information. To make a judgment. That is, when maintenance is performed on the machine tool, various parts are repaired or replaced as needed, so that the next maintenance time for the subsequent operating state naturally changes. Therefore, if the next maintenance time is determined in consideration of what kind of maintenance has been performed this time, a more appropriate time can be determined.
[0048]
In addition, the numerical control device 1 causes the operation information of the machine tool to be stored in each of the cumulative storage area 17 and the temporary storage area 18 of the primary storage device 5, and when the maintenance is executed, the temporary storage area 18 Deleted (changed) stored contents. Therefore, the management center 15 determines the timing based on the operation information stored in the temporary storage area 18 for the maintenance to be performed at relatively short intervals, and accumulates the maintenance to be performed at the relatively long intervals. The timing can be determined based on the operation information stored in the storage area 17, and maintenance can be performed more effectively.
[0049]
(Second embodiment)
FIGS. 8 and 9 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only the different parts will be described below. The numerical control device (maintenance management device) 20 in the second embodiment deletes the communication control device 4 and the interface 8 from the numerical control device 1 in the first embodiment, and replaces the arithmetic device 2 with the arithmetic device (operation information storage means, Means, notification means) 21. Therefore, the numerical controller 20 does not communicate with the management center 15 as in the first embodiment, and the arithmetic unit 21 determines the maintenance execution time.
[0050]
Next, the operation of the second embodiment will be described with reference to FIG. FIG. 9 is a control flow of the numerical control device 20. The communication process with the management center 15 is deleted from FIG. 7 in the first embodiment, and the timing of maintenance is determined on the numerical control device 20 side. It is like that.
[0051]
Therefore, when the maintenance is performed and the maintenance information is input by the input device 14, the arithmetic unit 21 determines the next and subsequent maintenance times based on the maintenance information. The input maintenance information is stored in the primary storage device 5.
[0052]
As described above, according to the second embodiment, the numerical control device 20 stores the operation information according to the case where the machine tool is operated, and determines the time at which the maintenance of the machine tool should be performed based on the operation information. Since the judgment is made and the user is notified, as in the first embodiment, for example, since the machine tool is second-hand, the maker does not know the information unique to the device and the user, and the maker side actively manages the maintenance. Even in a state where the maintenance cannot be performed, the user can be prompted to perform the maintenance by the notification.
[0053]
Further, when the information relating to the maintenance of the machine tool is input, the numerical controller 20 determines the next or later maintenance time in consideration of the maintenance information as well. The timing can be determined. Further, the numerical control device 20 stores the operation information of the machine tool in each of the cumulative storage area 17 and the temporary storage area 18 of the primary storage device 5, and stores the temporary storage area 18 when the maintenance is executed. Since the contents are deleted, maintenance can be performed more effectively as in the first embodiment.
[0054]
The present invention is not limited to the embodiment described above and shown in the drawings, and the following modifications or extensions are possible.
The communication network does not necessarily need to use a public communication line, but may use a dedicated communication line.
The items of the user information and the machine information are merely examples, and necessary items may be appropriately selected according to each embodiment.
In the first embodiment, the transmission of the maintenance execution time from the management center 15 may be performed as needed. For example, the operator can directly contact the user by telephone or send an e-mail to perform the maintenance. May be recommended.
The process of notifying the management center 15 of the execution of the maintenance may be performed as needed.
[0055]
The operation information does not necessarily need to be stored in the two storage areas 17 and 18 in parallel. The management of the storage contents may be performed by the management center 15 side. For example, only the cumulative operation information is transmitted from the numerical controller 1 to notify that the maintenance has been performed by the management center 15 side. At this time, the contents of the primary storage area set on the management center 15 side may be deleted.
The maintenance management device does not necessarily need to have a function as a numerical control device, and may be configured as a dedicated device that performs only maintenance management.
[0056]
【The invention's effect】
According to the maintenance management device for a machine tool according to the first aspect, when the operation information storage unit stores the operation information according to the case where the machine tool is operated, the determination unit determines the machine tool based on the operation information. To determine when to perform maintenance. The notification means notifies the user when the maintenance time is determined. For example, since the machine tool is second-hand, the maker does not know the information specific to the device or the user, and the maker actively manages the maintenance. Even in a state where the maintenance cannot be performed, it is possible to prompt the execution of the maintenance by notifying the user.
[0057]
According to the maintenance management device for a machine tool according to the second aspect, when information related to the maintenance of the machine tool is input by the maintenance information input unit, the determination unit determines the maintenance time in consideration of the maintenance information. If the next maintenance time is determined in consideration of what kind of maintenance has been performed this time, a more appropriate time can be determined.
[0058]
According to the maintenance management device for a machine tool according to the third aspect, the operation information storage means stores the operation information of the machine tool in each of the cumulative storage area and the temporary storage area, and the information change means executes the maintenance. Since the storage contents of the temporary storage area are changed when the maintenance is performed, the determination unit determines the timing of the maintenance to be performed at a relatively short interval based on the operation information stored in the temporary storage area. For maintenance to be performed at long-term intervals, the timing can be determined based on the operation information stored in the cumulative storage area, and more appropriate maintenance can be performed.
[0059]
According to the maintenance management system for a machine tool according to claim 4, the maintenance management device transmits the machine information and the user information to the outside via the communication network, and transmits the operation information to the outside at predetermined intervals. The management center receives and registers the transmitted information, and determines when to perform maintenance on the machine tool based on the operation information. Therefore, similarly to the first aspect, the management side can easily make a maintenance recommendation to the user at the maintenance time determined based on the grasped information. Support will be easier.
[0060]
According to the maintenance management system for a machine tool according to claim 5, when the timing is determined by the determination means, the management center transmits the maintenance execution time via the communication network. Is transmitted to the user when the information is transmitted, the user can know the maintenance execution time transmitted from the management center side by the notification by the maintenance management device, and the maintenance can be performed more smoothly. Will be done.
[0061]
According to the maintenance management system for a machine tool according to claim 6, the maintenance management device includes a maintenance information input unit, the communication unit transmits the maintenance information to the outside, and the determination unit of the management center transmits the transmitted maintenance information. The maintenance timing is determined in consideration of the above, so that the same effect as that of the second aspect can also be obtained for the determination means of the management center in the maintenance management system of the fourth or fifth aspect.
[0062]
According to the maintenance management system for a machine tool according to the seventh aspect, the maintenance management device stores the operation information of the machine tool in each of the cumulative storage area and the temporary storage area. Since the storage contents of the storage area are changed, the same operation and effect as those of the third aspect can be obtained for the determination means of the management center in the maintenance management system of the fourth to sixth aspects.
[Brief description of the drawings]
FIG. 1 is a first embodiment of the present invention, and is a flowchart showing control contents when a user starts a registration program and performs information registration processing with respect to a management center.
FIG. 2A illustrates an example of machine information that is information unique to a machine tool, and FIG. 2B illustrates an example of information unique to a user.
FIG. 3 is a functional block diagram showing a configuration of a maintenance management system centered on a numerical controller.
FIG. 4 is a diagram showing an example of a machine tool operation information item stored in a primary storage device;
FIG. 5 is a diagram showing a memory image of a primary storage device.
FIG. 6 illustrates an example of maintenance information.
FIG. 7 is a sequence diagram showing processing performed between the numerical control device and the management center when the machine tool is normally operated after the user registration processing.
FIG. 8 is a view corresponding to FIG. 3, showing a second embodiment of the present invention.
FIG. 9 is a control flow chart of the numerical controller.
[Explanation of symbols]
1 is a numerical control device (maintenance management device), 2 is an arithmetic device (notification means, operation information storage means), 4 is a communication control device (communication means), 5 is a primary storage device (operation information storage means), and 6 is an initial Value storage device (storage means), 9 is LCD (notification means), 11 is this machine (machine tool), 13 is motor (machine tool), 14 is input device (maintenance information input means, information change means), 15 is A management center (registration means, judgment means), 16 is a public communication line (communication network), 20 is a numerical control device (maintenance management device), and 21 is a computing device (operation information storage means, judgment means, notification means). .

Claims (7)

Operation information storage means for storing operation information according to when the machine tool is operated;
Determining means for determining when to perform maintenance on the machine tool based on the operation information;
And a notifying means for notifying the user when the maintenance time is judged by the judging means. When maintenance is performed on the machine tool, the maintenance tool includes a maintenance information input unit for inputting information about the maintenance,
The maintenance management device for a machine tool according to claim 1, wherein the determination unit determines the maintenance time in consideration of the maintenance information. The operation information storage means is configured to store operation information of the machine tool in each of a cumulative storage area and a temporary storage area,
The maintenance management device for a machine tool according to claim 1, further comprising an information changing unit configured to change a storage content of the temporary storage area when the maintenance of the machine tool is performed. Storage means for storing machine information unique to the machine tool, input means for inputting information unique to a user who uses the machine tool, and operation for storing operation information according to the case where the machine tool is operated An information storage unit, and a machine tool maintenance management device including a communication unit that transmits the machine information and the user information to the outside via a communication network, and a communication unit that transmits the operation information to the outside at predetermined intervals.
A registration unit that receives and registers information transmitted from the maintenance management device via the communication network; and a determination unit that determines a time at which maintenance of the machine tool should be performed based on the operation information. A maintenance management system for machine tools, comprising a management center. When the timing is determined by the determination unit, the management center transmits a maintenance execution time to the maintenance management device via the communication network,
The maintenance management system for a machine tool according to claim 4, wherein the maintenance management device includes a notification unit for notifying a user of the information when the execution time is transmitted. The maintenance management device,
When maintenance is performed on the machine tool, the maintenance tool includes a maintenance information input unit for inputting information about the maintenance,
The communication unit is configured to transmit the maintenance information to the outside via the communication network,
The maintenance management system for a machine tool according to claim 4, wherein the determination unit of the management center determines the maintenance time in consideration of the maintenance information. The maintenance management device,
The operation information storage means is configured to store the operation information of the machine tool in each of a cumulative storage area and a temporary storage area,
The maintenance management system for a machine tool according to any one of claims 4 to 6, further comprising an information changing unit configured to change a storage content of the temporary storage area when the maintenance of the machine tool is performed. .

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