Machining performance management system for NC machine tools, server device, and machining status monitoring program

Abstract

To enable management of machining results for each NC machine tool without using a process control terminal. [Solution] The NC device attached to the NC machine tool includes a display means for displaying a character information input screen on which character information can be input, and a character information storage means for storing at least one machining management data including a command number represented by a character string corresponding to an arbitrary machining command input using the character information input screen, and a control flag set / updated according to the machining status of the workpiece according to the machining command. The server device includes a scanning means for periodically scanning the machining management data, which is character information stored in the character information storage means of the NC device, and judging the start and end of machining of the workpiece according to the machining command according to the value of the control flag, and an analyzing means for analyzing the machining performance according to the machining command by collating the command number with the operation history data corresponding to the command number when the scanning means judges that machining has ended.

Description

[Technical field]

[0001] The present invention relates to a machining performance management system for an NC machine tool, a server device, and a machining status monitoring program. [Background technology]

[0002] Japanese Patent Application Publication No. 2003-295920 (Patent Document 1) discloses a technology in which the NC (Numerical Control) devices of multiple machine tools to be managed are connected to a single server device (hereinafter simply referred to as the "server"), the management data and history data for all connected NC devices are managed centrally by the server, and the display or update screen of the data for each machine tool managed by the server is made public on a network including the Internet, and the public screen can be accessed from a client computer connected to the network, thereby making it possible to manage any machine tool connected to the server. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2003-295920 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the system of Patent Document 1, the processing schedule of the NC device is managed on the server side, and each NC machine tool processes the workpiece under predetermined processing conditions (machine name, time, planned processing quantity, etc.), so that the progress of the process of the processed product can be easily managed on the server.

[0005] On the other hand, it is also common that the server does not manage the machining schedule, but operates the NC machine tool according to the on-site circumstances. In this case, the NC device numerically controls the machine tool (main body) according to the NC program selected by the operator in response to any machining command. In this way, each NC machine tool performs machining (turning, milling, etc.) of the workpiece in response to any machining command at any timing. The server usually constantly receives "operation history data" from the NC device, which indicates the execution status of the NC program, but the machining results cannot be determined from this operation history data alone. For this reason, a process management terminal was previously required in addition to the server.

[0006] The present invention has been made to solve the above-mentioned problems, and its object is to provide a machining performance management system that makes it possible to manage the machining performance of each NC machine tool without using a process control terminal and to easily manage the process of the workpiece.

[0007] Another object of the present invention is to provide a server device used in the machining performance management system, and a machining status monitoring program executed by the server device. [Means for solving the problem]

[0008] A machining performance management system for an NC machine tool according to an aspect of the present invention is a machining performance management system that manages the machining performance of each NC machine tool, and includes an NC device attached to the NC machine tool, and a server device connected to the NC device via a network and receiving operation history data indicating the execution status of an NC program from the NC device. The NC device includes a display means for displaying a character information input screen into which character information can be input, and a character information storage means for storing at least one machining management data input using the character information input screen. The "machining management data" includes a command number represented by a character string corresponding to an arbitrary machining command, and a control flag that is set and updated according to the machining status of a workpiece according to the machining command. The server device includes a scanning means for periodically scanning the machining management data, which is character information stored in the character information storage means of the NC device, and judging the start and end of machining of a workpiece according to the machining command according to the value of the control flag, and an analyzing means for analyzing the machining performance according to the machining command by collating the command number with the operation history data corresponding to the command number when the scanning means judges that machining has ended.

[0009] Preferably, the variables that the control flag can take include a first value indicating the start of processing and a second value indicating the end of processing, and the scanning means records the time when the control flag is set to the first value as the processing start time, and records the time when the control flag is updated from the first value to the second value as the processing end time.

[0010] More preferably, the analysis means calculates the number of executions of the machining main program executed during the period between the machining start time and the machining end time recorded by the scanning means as the number of times the workpiece is actually machined according to the machining command.

[0011] It is desirable that the server device further includes a machining performance storage means for storing machining performance data including a facility name for identifying each NC machine tool, a command number, a machining start time, a machining end time, and an actual machining number.

[0012] In one embodiment, the processing management data includes, in addition to the command number and the control flag, at least one of a code number of the processed product specified by the command number and a planned number of processes.

[0013] When the NC device is, for example, a FANUC NC device, the text information input screen may be configured with a "maintenance information screen" on which maintenance information for the NC machine tool is described.

[0014] A server device according to an aspect of the present invention is a server device connected to an NC device attached to an NC machine tool via a network. The NC device is provided with character information storage means for storing at least one piece of machining management data, including a command number represented by a character string corresponding to an arbitrary machining command input using a character information input screen, and a control flag set and updated according to the machining status of a workpiece according to the machining command. The server device is provided with a scanning means for periodically scanning the machining management data, which is character information stored in the character information storage means of the NC device, and judging the start and end of machining of a workpiece according to the machining command according to the value of the control flag, and an analyzing means for collating the command number received from the NC device with the corresponding operation history data in response to the judgment of the end of machining by the scanning means, and analyzing the machining performance according to the machining command.

[0015] A machining status monitoring program according to one aspect of the present invention is a program executed by a server device connected to an NC device attached to an NC machine tool via a network, and includes the steps of periodically scanning at least one machining management data including a command number expressed by a character string corresponding to an arbitrary machining command stored as character information in the NC device and a control flag which is set and updated according to the machining status of the workpiece according to the machining command, a step of determining the start of machining of the workpiece according to the machining command when the value of the control flag is a first value, a step of determining the end of machining of the workpiece according to the machining command when the value of the control flag is a second value, and a step of analyzing the machining performance according to the machining command by comparing the command number received from the NC device with the corresponding operation history data in response to the determination that machining has ended. Effect of the Invention

[0016] According to the present invention, the processing results of each NC machine tool can be managed on the server side without using a process control terminal. As a result, the process control of the workpiece can be easily performed. [Brief description of the drawings]

[0017] [Figure 1] 1 is a diagram showing a schematic diagram of an overall configuration of a machining performance management system according to an embodiment of the present invention; [Diagram 2] 1 is a diagram showing a schematic overview of a machining performance management system according to an embodiment of the present invention; [Diagram 3] 2 is a block diagram showing a functional configuration of an NC device and a server according to the embodiment of the present invention. FIG. [Figure 4] 4 is a table showing an example of the contents of processing management data according to the embodiment of the present invention. [Diagram 5] FIG. 13 is a diagram showing a specific example of a character information input screen. [Figure 6] 4 is a table showing an example of the contents of machining performance data stored in a machining performance storage unit in the embodiment of the present invention. [Figure 7] 2 is a time chart showing an overall flow of a machining performance management system according to an embodiment of the present invention. [Figure 8] 10 is a flowchart showing a machining status monitoring process executed by a server in the embodiment of the present invention. [Figure 9] 4 is a flowchart showing a process (first process) at the start of machining and a process (second process) at the end of machining, which are executed by a server in the embodiment of the present invention. [Figure 10] FIG. 1 is a diagram conceptually illustrating a known machining performance management system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0019] First, the basic configuration of an NC machine tool 1 according to an embodiment of the present invention will be briefly described with reference to FIG. 1. The NC machine tool 1 includes a machine tool body 10 having a drive system such as a feed axis driven by a servo motor, and an NC device 2 that performs numerical control of the machine tool body 10 during workpiece machining. The NC device 2 is connected to a server 4 via a network NW, and various data and programs are transmitted and received between the NC device 2 and the server 4. In general, a plurality of NC machine tools 1 (NC devices 2) are connected to one server 4 by wire or wirelessly. The plurality of NC machine tools 1 may include an NC lathe, a machining center, an NC grinder, and the like (including at least a machining center). A display device (not shown) installed at the site (factory) is connected to the network NW, and the operating status of the plurality of NC machine tools 1 can be confirmed on the display device.

[0020] The NC device 2 controls the machine tool body 10 in accordance with the NC program and numerical control parameters downloaded from the server 4. The NC program typically includes a main program (hereinafter referred to as the "machining main program") and a subprogram called from the main program.

[0021] Fig. 2 shows an overview of the machining performance management system including the NC device 2 and the server 4. As shown in Fig. 2, the NC device 2 has an operation panel 22 equipped with a display unit. Generally, the display screen of the operation panel 22 displays information on the program being executed, workpiece position information, maintenance information, etc. In addition, the operation panel 22 can also be used to select the machining main program used for machining the workpiece, and to input macro variables and program comments used for controlling the machine tool main body 10.

[0022] In the machining performance management system of this embodiment, the server 4 does not manage the machining schedule, and each NC machine tool 1 machines a workpiece according to an arbitrary machining command given by an on-site worker. A known machining performance management system for such a case where the NC machine tool 1 is operated under the initiative of the on-site worker is shown in FIG.

[0023] 10, in a known machining performance management system, an on-site worker receives a machining command on a paper instruction sheet (or an on-site process control terminal 9), selects a machining main program corresponding to the machining command via an operation panel 22, and starts the operation of an NC machine tool 1. An NC device 2 executes the selected machining main program (and a subprogram called from the machining main program) to perform a machining cycle for a workpiece according to the machining command.

[0024] The NC device 2 has a function of loading and unloading NC programs such as a machining main program stored in the server 4, and automatically uploading (transmitting) "operation history data" showing the execution status of the NC program to the server 4. However, since the operation history data alone does not allow the machining performance of each NC machine tool 1 to be grasped, conventionally, each time the machining of a workpiece is completed in each NC machine tool 1 (the machining according to an arbitrary machining command is completed), the end of machining of the workpiece in the corresponding NC machine tool 1 is input to the process control terminal 9, enabling process control of the machined product.

[0025] The machining results can be identified by the content of the machining command, the date and time when the machining command was executed (the start time and the end time of machining), and the actual number of machining operations. The machining command is identified by a "command number" that uniquely represents the processed product and the type of processing. The processed product can be identified by a "code number."

[0026] If an operator could operate the operation panel 22 and use macro variables and program comments used as control data for the NC unit 2, it would be possible to automatically send data required for managing machining results, including command numbers, to the server 4, but command numbers are usually expressed as character strings (including letters), so such a method cannot be adopted. Specifically, while only numerical values ​​can be input for macro variables and character strings can be input for program comments, it is necessary to change the program comment every time the command number (machined product) changes, which is not realistic.

[0027] 2, the machining record management system according to this embodiment is characterized in that a character information input screen into which character information can be input is provided on the display means of the operation panel 22, and this "character information input screen" can be used to input the start timing and end timing of a machining command together with the command number (character information), thereby making it possible to manage the machining record for each NC machine tool 1 on the server 4 side without using the process control terminal 9. The machining record management system for the NC machine tool 1 will be specifically described below.

[0028] In this embodiment, the NC device 2 is, as an example, an NC device manufactured by FANUC, and in this embodiment, an example is described in which the "text information input screen" is configured by a "maintenance information screen" displayed on the operation panel of the NC device manufactured by FANUC.

[0029] <Outline of the processing performance management system> The schematic configuration of the machining performance management system will be described with reference to Fig. 3. Fig. 3 is a block diagram showing the schematic configuration of the machining performance management system and also showing the functional configuration of the NC device 2 and the server 4.

[0030] The machining performance management system according to this embodiment includes an NC unit 2 attached to an NC machine tool 1, and a server 4 connected to the NC unit 2 via a network NW.

[0031] The NC device 2 includes a processor 21 that performs various calculation processes, an operation panel 22 operated by a user (operator), a memory 23 that stores various data and programs, a character information storage unit 24 that stores character information, and a communication interface 26 connected to the network NW. The processor 21 of the NC device 2 controls the drive system 3 of the machine tool main body 10, and transmits predetermined information (including operation history data) to the server 4 via the communication interface 26.

[0032] The operation panel 22 has a display means for displaying various information and an input means for receiving input from the user. The display screen of the operation panel 22 displays information on the program being executed, work position information, maintenance information, etc. The "maintenance information screen" on which the maintenance information is displayed usually only displays the specifications of each component device, and generally, on-site workers do not use the maintenance information screen.

[0033] In this embodiment, an operator inputs "machining management data" (described later) into a maintenance information screen (character information input screen) that allows input of a character string, thereby enabling the server 4 to automatically analyze the machining performance of each NC machine tool 1. The machining management data input using the maintenance information screen is stored in the character information storage unit 24.

[0034] FIG. 4 is a chart showing an example of the contents of machining management data. The machining management data includes at least a command number expressed as a character string corresponding to an arbitrary machining command, and a control flag that is set / updated according to the machining status (machining start / end) of the workpiece according to the machining command. In this embodiment, the machining management data further includes a code number of the machined product specified by the command number, and a planned machining count (number of commands). In the following description, data of the machining management data other than the control flag (command number, code number, planned machining count) is referred to as "machining command data."

[0035] The command number is typically expressed by a combination of numbers, letters, and symbols (character strings). Similarly, the code number is typically expressed by a combination of numbers, letters, and symbols (character strings). The number of scheduled processes (command numbers) is expressed by numbers.

[0036] For example, while checking a paper instruction sheet, the worker inputs the machining instruction data (instruction number, code number, number of instructions) written on the instruction sheet into the maintenance information screen. The control flag is a variable (single-digit number) and, as an example, is set / updated to "1" (first value) when machining starts and to "2" (second value) when machining ends. The control flag indicates the machining status of the workpiece, and is set to "1" only while the workpiece is being machined. When inputting multiple pieces of machining management data in advance, all control flags can be set to "2" and updated to "1" when machining starts.

[0037] Figure 5 shows a specific example of a maintenance information screen, which is a text information input screen, where (A) shows an example of the display screen when inputting machining management data, and (B) shows an example of the display screen when rewriting a control flag. As shown in Figure 5(A), the machining management data is displayed above the normal maintenance information, and is displayed at the top when the maintenance information screen is opened. The machining management data is input line by line.

[0038] A specific keyword (hereinafter referred to as the "command end keyword") is displayed on the line following the last line of the processing management data. As will be described later, the scanning unit 51 of the server 4 can determine the description range of the processing management data by the command end keyword. The command end keyword may be an alphabetical character string such as "END" or may be a specific number or symbol.

[0039] The order in which the multiple items constituting the machining management data are written is fixed, and in this embodiment, the following are written from left to right: control flag (numeric value 1 or 2), command number (character string), code number (character string), and command count (numeric value). As an example, the items are separated by semicolons (;). Note that, in order to reduce input errors by the operator, comment information indicating the order in which the items are written may be displayed below the command end keyword. As shown in FIG. 5, the comment information includes multiple item names (character strings) written in the input order, and definitions (character strings) for each value that the control flag can take.

[0040] Referring again to FIG. 3, the server 4 includes a processor 41 that performs various arithmetic processing, a memory 42 that stores various data and programs, an operation history memory unit 43 that stores operation history data, and a processing performance memory unit 44 that stores processing performance data.

[0041] The server 4 includes, as its functional configuration, a scanning unit 51 that periodically scans the machining management data held (stored) in the character information storage unit 24 of each NC device 2 and determines the start and end of machining of a workpiece (according to the corresponding command number) according to the value of a control flag, and an analyzing unit 52 that analyzes the machining results of the NC machine tool 1 in response to the determination of the end of machining by the scanning unit 51. Specific processing by the scanning unit 51 and the analyzing unit 52 will be described later.

[0042] The scanning unit 51 and the analyzing unit 52 are realized by the processor 41 executing a machining status monitoring program (including a scanning program and an analyzing program) which is an application program stored in the memory 42. The machining status monitoring program may be stored on the cloud.

[0043] The operation history storage unit 43 stores operation history data received from each NC device 2 connected via the network NW. The operation history data includes a program number (Oxxxx) that identifies a machining main program (NC program) and time-series code information commanded by the machining main program. It also includes a program number (Oxxxx) that identifies a subprogram called from the machining main program and time-series code information commanded by the subprogram.

[0044] The machining performance storage unit 44 stores machining performance data based on the analysis results of the analysis unit 52. Fig. 6 is a diagram showing an example of the contents of the machining performance data stored in the machining performance storage unit 44. As shown in Fig. 6, the machining performance data includes a facility name for identifying each NC machine tool 1, character information (machining command data), machining start time (date and time), machining end time (date and time), and actual machining number (achievement number). Note that the character information stored in the machining performance storage unit 44 only needs to include at least a command number. A plurality of machining performance data are stored in the machining performance storage unit 44.

[0045] <Operation of the processing performance management system> The operation of the machining performance management system will be described with reference to Fig. 2, Fig. 7 and Fig. 8. Fig. 7 is a time chart showing the overall flow of the machining performance management system according to the present embodiment. Fig. 8 is a flow chart showing the machining status monitoring process executed by the server 4. Note that, here, it is assumed that a plurality of machining management data with a control flag set to "2" have been input (stored in the character information storage unit 24) before the machining status monitoring process is started.

[0046] 2 and 8, the scanning unit 51 of the server 4 periodically (for example, every 5 seconds) scans the machining management data (character information) stored in the character information storage unit 24 of the NC device 2 (step S1). Then, the presence or absence of a change in the control flag for each machining management data is detected (step S3).

[0047] For example, assuming that machining is to be started according to the command number on the second line displayed on the maintenance information screen in Fig. 7, the operator changes the control flag on the second line from "2" to "1" via the operation panel 22. It is desirable to change the control flag before machining actually starts (before selecting the main machining program and setting the workpiece).

[0048] When the value of the control flag changes from "2" to "1", the scanning unit 51 determines that machining of the workpiece has started on the NC machine tool 1 (step S5), and executes the first process (step S7). The first process is shown in Fig. 9(A). Note that the control flag may be set to "1" when the machining management data is input, and in this case, it is determined that machining has started at the point when the control flag is set to "1".

[0049] As shown in Fig. 9(A), the scanning unit 51 temporarily records the machining command data (data including the command number) associated with the control flag of "1" together with the "equipment name" capable of identifying the target NC machine tool 1 as retained data in an internal memory or the like (step S21). The equipment name is expressed, for example, as a character string. In addition, the current time is added (recorded) to the retained data as the machining start time (step S23). The processing order of steps S21 and S23 may be reversed, and these processes may be performed simultaneously.

[0050] At this point, the retained data includes the equipment name, the processing command data, and the processing start time. That is, the command number and the processing start time are recorded in association with the equipment name that started processing the workpiece. The scanning unit 51 scans multiple NC devices 2 connected via a network, and therefore can retain multiple retained data simultaneously.

[0051] In the corresponding NC machine tool 1, machining of the processed product specified by the command number (code number) is continuously executed for the number of commands. When the continuous operation of the NC machine tool 1 stops and machining is completed, the operator removes the workpiece and then changes the control flag on the second line from "1" to "2" via the operation panel 22.

[0052] When the value of the control flag changes from "1" to "2," the scanning unit 51 determines that the machining of the workpiece by the NC machine tool 1 has been completed (step S9), and executes the second process (step S9). The second process is shown in FIG. 9(B).

[0053] 9(B), the scanning unit 51 searches for retained data that matches the machining command data whose control flag has become "2" among several retained retained data (step S31). Then, the current time is added (recorded) as the machining end time to the corresponding retained data (step S33). After recording the machining end time, the scanning unit 51 outputs the retained data, including the name of the equipment that machined the workpiece, the command number, the machining start time, and the machining end time, to the analyzing unit 52.

[0054] The analysis unit 52 calculates the actual machining number based on the retained data obtained from the scan unit 51 (step S35). That is, the analysis unit 52 calculates the actual machining number by collating with the operation history data corresponding to the command number stored in the operation history storage unit 43. Since the operation history data indicates the command time of the M code (M02 or M30) indicating the end of the machining main program (completion of machining of the workpiece), the analysis unit 52 can calculate the number of times the machining main program was executed during the period between the machining start time and machining end time recorded in the retained data as the actual machining number according to the machining command.

[0055] When the calculation of the actual processed number is completed, the analysis unit 52 outputs the retained data including the actual processed number in CSV format to the processing result storage unit 44 (step S37). As a result, the retained data is stored as processing result data in the processing result storage unit 44. As shown in FIG. 6, the processing result data includes the name of the equipment that performed the processing, processing command data including a command number, processing start time, processing end time, and the actual processed number.

[0056] In this way, a plurality of pieces of machining performance data are stored in the machining performance storage unit 44. This enables the server 4 to manage when, which NC machine tool 1, and how many pieces of machining were executed according to which machining command.

[0057] As described above, according to this embodiment, by providing the operation panel 22 of the NC device 2 with a "character information input screen" on which the start timing and end timing of a machining command can be input along with the command number, the server 4 can automatically collect and analyze information required for managing the machining record from the NC device 2 (see FIG. 2). Therefore, according to the machining record management system of this embodiment, the server 4 can collectively manage the machining record of each NC machine tool 1 without using the process management terminal 9 (FIG. 10).

[0058] In addition, since the multiple NC machine tools 1 installed in the factory include an NC lathe used in the turning process of the workpiece, a machining center used in the milling process of the workpiece, and an NC grinding machine used in the polishing process of the workpiece, it is possible to manage the progress of the process until a single workpiece is completed based on the multiple processing performance data stored in the processing performance memory unit 44.

[0059] The machining status monitoring method executed by the server 4 can also be provided as an application program. Such a program can be provided by being recorded on an optical medium such as a CD-ROM (Compact Disc-ROM) or a computer-readable non-transitory recording medium such as a memory card. The program can also be provided by downloading it via a network.

[0060] The program according to the present invention may be one that executes processing by calling necessary modules in a predetermined sequence at a predetermined timing among program modules provided as part of a computer's operating system (OS). In this case, the program itself does not include the above modules and executes processing in cooperation with the OS. Programs that do not include such modules may also be included in the program according to the present invention.

[0061] The program according to the present invention may be provided by being incorporated into a part of another program. In this case, the program itself does not include the modules included in the other program, and executes processing in cooperation with the other program. Such a program incorporated into another program may also be included in the program according to the present invention.

[0062] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0063] 1 NC machine tool, 2 NC device, 4 server, 22 operation panel (display means), 24 character information storage unit, 43 operation history storage unit, 44 machining performance storage unit, 51 scanning unit, 52 analysis unit.

Claims

1. A machining performance management system that collectively manages machining performance for each NC machine tool, The system comprises an NC unit provided in each of the NC machine tools which executes a machining cycle of a workpiece in response to an arbitrary machining command, and a server device which is connected to a plurality of the NC units via a network and receives operation history data including a program number which indicates an execution status of an NC program from the NC units, The NC device is A display means for displaying a character information input screen on which character information can be input; a character information storage means for storing at least one piece of machining management data, the character information storage means including a command number represented by a character string corresponding to an arbitrary machining command input using the character information input screen, and a control flag which is set and updated according to a machining status of a workpiece according to the machining command; The command number is identification information that uniquely represents a processed product and a processing type, The server device includes: a scanning means for periodically scanning the machining management data, which is character information stored in the character information storage means of the NC device, and determining the start and end of machining of the workpiece in accordance with the machining command based on the value of the control flag; an analysis means for analyzing a machining result according to the machining command by collating the operation history data corresponding to the command number in response to the determination of the machining end by the scanning means; a machining performance storage means for storing machining performance data including an equipment name for identifying each of the NC machine tools, the command number, the machining start time, the machining end time, and the actual machining number.

2. The control flag may have a first value indicating a start of processing and a second value indicating an end of processing; 2. The machining performance management system for an NC machine tool according to claim 1, wherein said scanning means records a time when said control flag is set to said first value as a machining start time, and records a time when said control flag is updated from said first value to said second value as a machining end time.

3. 3. The machining performance management system for NC machine tools according to claim 2, wherein said analysis means calculates the number of executions of the machining main program executed during the period between the machining start time and the machining end time recorded by said scanning means as the number of times that the workpiece is actually machined according to said machining commands.

4. 2. The machining performance management system for an NC machine tool according to claim 1, wherein the machining management data includes, in addition to the command number and the control flag, at least one of a code number of a machined product identified by the command number and a planned number of machining operations.

5. 5. The machining performance management system for NC machine tools according to claim 1, wherein said character information input screen is configured by a maintenance information screen on which maintenance information for said NC machine tool is described.

6. A server device connected via a network to an NC device attached to an NC machine tool that executes a workpiece machining cycle in response to an arbitrary machining command, an operation history storage means for storing operation history data including a program number, which indicates an execution status of an NC program, received from the NC device; a scanning means for periodically scanning at least one piece of machining management data, the scanning means including a command number, which is a character string corresponding to an arbitrary machining command and is identification information uniquely indicating a machined product and a machining type, and a control flag which is set and updated according to the machining status of the workpiece according to the machining command, and for determining the start and end of machining of the workpiece according to the machining command based on the value of the control flag; an analysis means for collating the command number received from the NC device with the corresponding operation history data in response to the scan means determining that the machining is completed, and analyzing the machining results according to the machining command; a processing performance storage means for storing processing performance data including a facility name for identifying each of the NC machine tools, the command number, a processing start time, a processing end time, and an actual processing number, said server device comprising:

7. A processing status monitoring program executed by a server device connected via a network to an NC device attached to an NC machine tool that executes a workpiece processing cycle in response to an arbitrary processing command, storing operation history data including a program number, the operation history data indicating an execution status of the NC program, received from the NC device; A step of periodically scanning at least one machining management data including a command number, which is a character string corresponding to an arbitrary machining command and is identification information uniquely representing a machined product and a machining type, and a control flag which is set and updated according to a machining status of a workpiece according to the machining command, which is stored as character information in the NC device; When the value of the control flag is a first value, determining whether to start machining of the workpiece in accordance with the machining command; When the value of the control flag is a second value, determining completion of machining of the workpiece according to the machining command; In response to the determination that the machining is completed, a step of comparing the command number received from the NC device with the corresponding operation history data to analyze the machining results according to the machining command; and a step of storing machining performance data including a facility name for identifying each of the NC machine tools, the command number, a machining start time, a machining end time, and an actual machining number.

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