KR101760121B1 - System and method for operating Numerical Control machine - Google Patents

Abstract

The present invention relates to a system and method for operating an NC machine tool. According to the present invention, an expected machining time is calculated by analyzing a mounted project file, and feedback information received in real time from an NC machine tool is further reflected By re-calculating the machining time in real time, it is possible to effectively reduce the error between the expected machining time and the actual machining time to effectively plan the work.

Description

Technical Field [0001] The present invention relates to an NC machine tool operating system and method capable of establishing a machining plan and predicting machining time,

More particularly, the present invention relates to an NC machine tool operating system and method, and more particularly, to an NC machine tool operating system and method, which analyzes a project file to calculate and output an expected machining time, And to make it possible to accurately calculate the time, and to establish a machining plan through QR code recognition.

NC (Numerical Control) A machine tool is a tool that automatically determines the position of a cutting tool by a predetermined application program when a worker inputs numerical data that selectively instructs machining data, shape, required tools, and moving speed. Which is useful for mass production of factory automation and workpieces (workpieces).

In order to effectively use these NC machine tools, an overall work plan must be established, in order to predict the machining time of the currently mounted workpiece.

Korean Patent No. 10-0149482 discloses a technique for a numerical control device for predicting a machining end time. That is, the machining time is estimated through the preset machining speed and machining length.

However, when the machining operation is performed through the preset data, an unexpected situation may occur. Therefore, the estimated machining time and the actual machining time are greatly different from each other, so that it is often difficult to establish a work plan.

In addition, when the workpiece is mounted on the NC machine tool, appropriate processing is performed through a predetermined project file. In order to do this, the user has to input or select the project file to be applied to the workpiece.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an NC machine tool, It is an object of the present invention to provide a technique for effectively reducing the error between the expected machining time and the actual machining time by re-calculating the estimated machining time in real time.

Another object of the present invention is to provide a technique for recognizing a QR code when a workpiece is mounted on an NC machine tool to establish an optimum machining plan and to make it possible to estimate the machining time according to the established machining plan .

According to an aspect of the present invention, there is provided a method of operating an NC machine tool, the method comprising: (a) analyzing a project file to calculate and output an expected machining time; (B) interpreting the project file to process the workpiece by controlling the servo unit and the spindle unit; (C) receiving and storing feedback information from the servo unit and the spindle unit; And a step (d) of re-calculating and outputting the estimated machining time by reflecting the feedback information.

In the step (a), the project file is analyzed to calculate an expected machining time based on a predicted machining length and an expected machining speed, the feedback information includes real-time coordinate information and velocity information of the tool, The remaining machining time with respect to the remaining machining length can be calculated by calculating the finished machining length and the actual machining speed through the real time coordinate information and the velocity information of the tool included in the feedback information.

(E) receiving a feed speed override command from a user, wherein, when controlling the servo unit in the step (b), processing for processing the workpiece by reflecting the feed speed override command is performed And the step (d) may calculate the remaining machining time with respect to the remaining machining length by reflecting the feed rate override command.

(F) obtaining photographed image information of a plurality of workpieces to which a specific marker is attached before the step (a); (G) reading the specific marker from the captured image; Loading (h) a plurality of project files corresponding to the specific landmarks in a memory; And (i) analyzing the plurality of loaded project files to establish a machining plan including a tool mounting sequence and a machining sequence for the plurality of workpieces, wherein (a) Estimated machining time can be calculated for the project file generated according to the machining plan established in step i).

According to another aspect of the present invention, there is provided an NC machine tool operating system including: a memory for storing a project file or feedback information received from an NC machine tool; A processing time calculating unit for calculating a predicted processing time by analyzing a project file stored in the memory or restoring a predicted processing time by reflecting the feedback information; And a screen output processing unit for processing the expected machining time so as to be displayed on the screen.

Here, the machining time calculating unit calculates the expected machining time based on the estimated machining length and the expected machining speed by analyzing the project file, and the feedback information received from the NC machine tool includes the real time coordinate information and the velocity information of the tool And calculating the finished machining length and the actual machining speed on the basis of the real time coordinate information and the velocity information of the tool included in the feedback information when the machining time calculating unit calculates the estimated machining time, The remaining machining time with respect to the remaining machining length can be calculated.

A photographing information analyzing unit for reading specific markings from photographed image information of a plurality of workpieces; And a plurality of project files corresponding to the specific landmarks read out by the photographing information analysis unit from the memory, analyzing the loaded plurality of project files, and determining a tool mounting order and a machining order for the plurality of workpieces And the machining time calculating unit calculates the expected machining time for the project file generated in accordance with the machining plan established in the machining plan establishing unit.

According to the present invention, not only the expected machining time can be calculated by analyzing the mounted project file, but also the feedback information received in real time from the NC machine tool is additionally reflected to recalculate the expected machining time in real time, And the actual machining time can be minimized, so that the work plan can be effectively established. In other words, if machining is temporarily stopped or a feed speed override occurs, it can be reflected in the remaining machining time, and in particular, the remaining machining time is calculated by reflecting the actual machining speed for the completed section to the remaining machining length , It is possible to accurately predict when the machining is completed.

In addition, it is possible to attach a specific marking such as a QR code to a plurality of workpieces, and automatically load a project file matched to the QR code through photographing before starting processing, so that the user must input or select the project file troublesomely It is convenient because there is no need to do.

In order to do this, it is necessary to process a plurality of workpieces using various tools. For this purpose, by rearranging the NC blocks in the project file and establishing a machining plan, the tool change is minimized, It can be maximized.

1 is a view for explaining an NC machine tool operating system according to an embodiment of the present invention.
Fig. 2 is a block diagram for explaining a configuration of the NC machine tool operating system shown in Fig. 1. Fig.
3 is a flowchart for explaining an NC machine tool operating method according to an embodiment of the present invention.
Figs. 4 to 8 are diagrams for explaining an example of a monitoring screen output through a display in a monitoring system of an NC machine tool operating system; Fig.
9 is a view for explaining an NC machine tool operating system according to another embodiment of the present invention.
FIG. 10 is a conceptual illustration of a part of the configuration of an NC machine tool in the NC machine tool operating system shown in FIG. 9; FIG.
11 is a flowchart for explaining an NC machine tool operating method according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, some configurations which are not related to the gist of the present invention may be omitted or compressed, but the configurations omitted are not necessarily those not necessary in the present invention, and they may be combined by a person having ordinary skill in the art to which the present invention belongs. .

In addition, each component, server, and system described below does not necessarily have to be an independent component or server that performs each function, but may be implemented as one or more programs or one or more servers or a collection of one or more systems, May be shared.

FIG. 1 is a view for explaining an NC machine tool operating system according to an embodiment of the present invention. FIG. 2 is a block diagram for explaining a configuration of a monitoring system and an NC machine tool in the NC machine tool operating system shown in FIG. to be. 1 and 2, the NC machine tool operating system according to an embodiment of the present invention mainly includes a monitoring system 100 and an NC machine tool 200.

First, the NC machine tool 200 has a built-in machining program and is a device for processing a workpiece by analyzing an input project file. The NC machine tool 200 is provided with a plurality of NC machines 200, which can simultaneously process different workpieces, and is connected to the monitoring system 100 through a network, Or the user command input from the monitoring system 100 may be transmitted to the NC machine tool 200. In this case, The NC machine tool 200 includes a communication means 210, a numerical control means 220, a servo unit 230 and a spindle unit 240.

The communication means 210 is provided for connecting a communication channel with the monitoring system 100 via a network and transmitting and receiving data.

The numerical control means 220 includes a predetermined machining program and analyzes and distributes a project file which is stored in the machining program or inputted from the monitoring system 100 and is supplied to the servo unit 230 and the spindle unit 240 ).

The servo unit 230 is provided for moving the tool axis to a specific coordinate (that is, moving the tool) by actuating a servo motor (not shown) according to a signal input from the numerical control means 220. [

The spindle unit 240 rotates the tool shaft according to a signal input from the numerical control means 220 to perform a cutting operation on the workpiece.

The machining process of the NC machine tool 200 can be checked in real time through the monitoring system 100. The monitoring system 100 includes a display 110, a user command input unit 120, a screen output processing unit 130, a processing image processing unit 140, a processing time calculating unit 150, a memory 160, 170 and a communication unit 180.

The display 110 displays the machining state of the workpiece being machined and the state of the tool in the three-dimensional graphic on the NC machine tool 200, the coordinates of the tool, the rotational speed of the tool, the NC block currently being machined, In addition, the expected machining time is displayed on the screen.

The user command input unit 120 is provided for receiving selection information or user commands for monitoring and controlling a plurality of NC machine tools 200. [

The screen output processing unit 130 is provided for processing information such as the state of the workpiece and the tool, the user interface, and the expected machining time so as to be output at a specific position on the display 110. 4 shows an example of a state in which information such as the state of the workpiece and the tool, the user interface, and the expected machining time is output through the display 110. [

The processed image processing unit 140 processes the state of the workpiece and the tool in a three-dimensional graphic based on the feedback information received from the NC machine tool 200 and outputs the processed state to the display 110 in cooperation with the screen output processing unit 130 .

The machining time calculating unit 150 analyzes the project file stored in the memory 160 and calculates the expected machining time. When the feedback information is received from the NC machine tool 200 and stored in the memory 160, the machining time calculating unit 150 reflects the feedback information And the expected machining time is recalculated.

The character forwarding processing unit 170 is provided to transmit the operating state of the NC machine tool 200 to the predetermined administrator portable terminal 300. [

The communication unit 180 is provided to transmit a user command to the NC machine tool 200 or to receive feedback information from the NC machine tool 200 in cooperation with a plurality of NC machine tools 200 via a network. In addition, the communication unit 180 processes the text message so that the text message can be sent through the mobile communication network in cooperation with the text message processing unit 170. [

The process of calculating the expected machining time for a specific workpiece in real time by the NC machine tool operating system according to the embodiment of the present invention will be described in more detail with reference to FIG.

3 is a flowchart illustrating a method of operating an NC machine tool according to an embodiment of the present invention. More specifically, the method of predicting machining time through real-time monitoring of NC machine tools is dealt with. When an actual machining process is performed, it is possible to monitor a plurality of NC machine tools 200 that are machined differently through a single monitoring system 100. However, for convenience, one NC machine tool 200 .

First, the user inputs a project file through the user command input unit 120 of the monitoring system 100. The input project file is stored in the memory 160 and is also transmitted to the NC machine tool 200 through the communication unit 180 . The communication means 210 of the NC machine tool 200 receives the project file from the monitoring system 100 and stores the project file in the numerical control means 220. Of course, the project file may be directly input to the NC machine tool 200 through a separate path, or already projected files may be DBed and mounted on the numerical control means 220. The monitoring system 100 may load the project file loaded on the numerical control means 220 of the NC machine tool 200 and store the project file in the memory 160 when the project file is directly mounted on the NC machine tool 200 .

When the workpiece is mounted on the NC machine tool 200, the machining operation can be performed according to a user command. The monitoring system 100 analyzes the project file before starting the machining of the NC machine tool 200, And outputs it < S305 >.

That is, the machining time calculating unit 150 of the monitoring system 100 can calculate the predicted machining time by analyzing the project file stored in the memory 160 and extracting the predicted machining length (total machining length) and the predicted machining speed , The screen output processing unit 130 processes the calculated estimated processing time so as to be output through the display 110. [

A project file containing a series of numerical data for machining one workpiece into a specific form consists of various NC blocks, as shown in the right side of FIG. 4 and the example shown in FIG. That is, the project file for the entire machining process is decomposed into NC blocks, which include commands for the feed of the tool and the rotation speed of the tool for a specific straight line section and a curved section. Of course, the curve section is decomposed into a fine linear section and then the sum of these fine linear sections is made.

In each straight line feed, the feed amount and the feed speed according to the coordinates are set, and the rotational speed of the tool according to the machining method is also set. Of course, the feed of the tool and the rotational speed of the tool can be accelerated and decelerated at the start and end points of each section.

When analyzing the project file in the machining time calculating unit 150 of the monitoring system 100, the entire transfer distance, that is, the estimated machining length, through which the co-tool is to be transferred, can be calculated through the coordinate information included in the NC block. In addition, the expected machining speed in each section can be calculated through the command for the feed rate (reflectance / deceleration per section) of the tool and the rotation speed of the tool (reflectance / deceleration per section). The machining time calculating unit 150 calculates the predicted machining time based on the predicted machining length and the predicted machining speed and associates the calculation result with the screen output processing unit 130 to display 110).

The numerical control means 220 of the NC machine tool 200 interprets and distributes the project file through the machining program and supplies the same to the servo unit 230 and the spindle By controlling the unit 240, the tool axis is fed according to the command and the tool is rotated so that the cutting operation is performed S310.

The numerical control means 220 of the NC machine tool 200 controls the servo unit 230 and the spindle unit 240 and receives feedback information from the servo unit 230 and the spindle unit 240, (100). Feedback information to be transmitted from the servo unit 230 and the spindle unit 240 to the numerical control means 220 may be real time coordinate information of the co-establishment or velocity information. The feedback information may also be operating status information including signals for machining, stopping, or error occurrence.

When the numerical control means 220 of the NC machine tool 200 receives the feedback information in real time from the servo unit 230 and the spindle unit 240 and transmits the feedback information to the monitoring system 100, The controller 180 stores the received feedback information in the memory 160 (S315).

In addition, the feedback information stored in the memory 160 of the monitoring system 100 is immediately output through the display 110 after being processed in the screen output processor 130. In other words, the machining image processing unit 140 real-time-processes the position of the tool and the workpiece in a three-dimensional graphic based on the coordinate information included in the feedback information, and outputs the processed image. Further, the machining time calculating unit 150 can determine whether the specific NC block in the project file is being processed or finished, through the coordinate information included in the feedback information, and can determine whether the specific NC block is completed, It can be displayed as shown in FIG. Since the feedback information includes the operating state information indicating the machining, the stopping, or the occurrence of an error, the screen output processing unit 130 divides the state of the tool into specific markers .

The coordinate information and speed information of the tool included in the feedback information are reflected and displayed in real time at a specific position of the display 110 by the screen output processing unit 130. That is, as shown in FIG. 7, the coordinates of the tooling, the feed rate, and the tool rotation speed (Spindle) are displayed in real time.

In addition, the user may arbitrarily set the conveyance speed of the co-ordinate through the user command input unit 120 of the monitoring system 100. That is, when a feed rate override command is input through the user command input unit 120, the feed rate override command is transmitted to the NC machine tool 200 through the communication unit 180, The unit 230 can be controlled so that the machining according to the command can be performed. 7, the feedback information of the servo unit 230, which is operated at the changed feed rate in accordance with the feed rate override command, is also output to the display 110 of the monitoring system 100 And transmitted to the monitoring system 100 side and stored in the memory 160.

Meanwhile, the feedback information received from the NC machine tool 200 is stored in the memory 160 and displayed on the display 110, and the machining time calculating unit 150 re-calculates the expected machining time by reflecting the feedback information Real time screen output < S320 >.

In other words, the expected machining time is calculated and displayed through the analysis of the project file before the start of machining. However, when the actual machining is performed, an unexpected situation occurs and it may show a difference from the theoretical expected machining time. For example, as a result of completing machining up to the first NC block and the second NC block, the workpiece may be subjected to a load, which may slow down the transfer speed. Of course, through the coordinate information and the speed information included in the feedback information, the machining time calculating unit 150 can grasp the completed machining length and the actual machining speed that have been completed so far. Accordingly, the finished machining time and the total finished machining time for each NC block that has been completed so far can be output as shown in FIGS. 4 and 5.

In addition, the machining time calculating unit 150 calculates the remaining machining time with respect to the remaining machining length in consideration of the actual machining speed with respect to the machining length that has been completed so far. That is, the actual machining speed for the section is calculated through the feedback information received from the NC machine tool 200 and stored in the memory 160. However, since an unknown load is generated during the conveying process of the co- If the machining speeds are different, then the aftermath may be enough to occur in the subsequent machining process. For example, the wear of the tool or the output of the motor may be one of the causes.

Therefore, the machining time calculating unit 150 calculates the remaining machining time with respect to the remaining machining length in consideration of the actual machining speed for the completed section. When calculating the remaining machining time, it is necessary to consider the estimated machining speed calculated through analysis of the initial project file and the increase / decrease ratio of the actual machining speed detected in real time through the feedback information, So as to calculate the remaining machining time. Of course, the actual machining speed also includes the acceleration / deceleration information for each section.

An example of calculating the remaining machining time with respect to the remaining machining length through the data obtained through the feedback information will be described as follows.

First, the remaining machining time for the remaining machining length can be expressed by the following equation.

[Remaining Machining Time (MT) = Initial Estimated Machining Time (PRT) * (Initial Estimated Machining Time (PT) for Actual Machining Length / Actual Machining Time (NT) for Actual Machining Length)

That is, by multiplying the initial estimated machining time (PRT) with respect to the remaining machining length by the ratio of the initial estimated machining time (PT) to the actual machining time (NT) to the actual machining length and calculating the remaining machining time (MT) will be. This reflects the fact that the variables that have been generated so far may well occur in the future.

In addition, when a feed rate override command is input through the user command input unit 120, the feed rate of the build through control of the servo unit 230 can be changed differently from that of the project file loaded first. Therefore, the machining time calculating section 150 also reflects the feed rate override command to calculate the remaining machining time with respect to the remaining machining length. Of course, when the feed rate of the tool is changed, the actual feed rate is returned in real time through the feedback information. Therefore, if the feed rate override command is not additionally changed, the feed rate override information is automatically Is reflected.

On the other hand, the feedback information includes operation state information indicating machining, pausing, or occurrence of an error. If the operation of the tool is stopped according to the intention of the user, or if an error occurs unintentionally, It should be reflected in processing time. Of course, interruptions due to pauses or errors are not reflected in the actual machining speed.

Further, in order to complete machining of one workpiece, two or more tools may be used in consideration of the tool life. According to the setting of the project file, the necessary tool may be automatically replaced according to the NC machine tool 200. [ Therefore, it is preferable to calculate the initial expected machining time or to reflect the replacement time of a specific tool when recalculating the estimated machining time in real time during the machining operation (that is, calculating the remaining machining time).

As described above in detail, according to the NC machine tool operating method of the present invention, it is possible to calculate the expected machining time by analyzing the project file mounted, and also to calculate the feedback information received in real time from the NC machine tool 200 By further re-calculating the estimated machining time in real time, it is possible to effectively reduce the error between the expected machining time and the actual machining time to effectively plan the work. In other words, if machining is temporarily stopped or a feed speed override occurs, it can be reflected in the remaining machining time, and in particular, the remaining machining time is calculated by reflecting the actual machining speed for the completed section to the remaining machining length , It is possible to accurately predict when the machining is completed.

FIG. 8 shows an example of a user interface output through the display 110 of the monitoring system 100. That is, the user can select a specific machine that needs to be monitored and controlled among a plurality of NC machine tools 200, or input commands such as start, stop, pause, and reset of machining.

In addition, in the processing time predicting system according to the embodiment of the present invention, the character sending function can be activated in the monitoring system 100, and the work status can be transmitted to the administrator administrator portable terminal 300 in advance. For example, when the character sending processing unit 170 of the monitoring system 100 transmits the estimated processing time, which is re-calculated in real time in association with the communication unit 180, to the administrator portable terminal 300 on a predetermined time basis, So that the follow-up action can be taken.

The monitoring system 100 analyzes daily, weekly, and monthly work patterns of the equipment through feedback information received from the NC machine tool 200 so as to increase the operation rate of the equipment and utilize it as a basis for improving productivity. They can be provided in graphs or tables.

9 is a block diagram for explaining an NC machine tool operating system according to another embodiment of the present invention. More specifically, in the NC machine tool operating system shown in FIG. 9, when a plurality of workpieces 591a to 591f are mounted on the work table 590 of the NC machine tool 500, the QR code (592a to 592f), etc., to establish a machining plan by itself and to predict the machining time thereafter.

Such an NC machine tool 500 operating system largely includes a monitoring system 400 and an NC machine tool 500.

The NC machine tool 500 includes a communication unit 510, a numerical control unit 520, a servo unit 530, a spindle unit 540, a tool mounting unit 550, a tool changing unit 560, A tool 580, and a work table 590.

The communication means 510, the numerical control means 520, the servo unit 530 and the spindle unit 540 are replaced by the preceding description with reference to FIG. 2, and the tool mounting portion 550, the tool changing means 560, The photographing means 570, the tool 590 and the work table 590 will be described with reference to FIG.

A tool 590 is detachably coupled to the tool mounting portion 550 and the tool 590 mounted on the tool mounting portion 550 can be transferred and rotated via the servo unit 530 and the spindle unit 540. In addition, the tool mounting portion 550 may be provided with a photographing means 570 in addition to the tool 590.

The photographing means 570 photographs the workpieces 591a to 591f placed on the work table 590 and transmits the photographed image information to the monitoring system 400 through the communication means 510. [

A plurality of tools 590 can be prepared and a specific tool 590 can be mounted or separated to the tool mounting portion 550 through the tool changing means 560 according to the machining plan. Likewise, the photographing means 570 can also be mounted on or separated from the tool mounting portion 550 via the tool changing means 560.

The workpieces 591a to 591f mounted on the work table 590 are mounted on the work table 590 by being rotated by the rotation of the tool 590 mounted on the tool mounting portion 550 Cut according to plan. Here, one or more workpieces 591a to 591f may be simultaneously put on the work table 590, and specific marks such as unique QR codes 592a to 592f may be attached to the respective workpieces 591a to 591f do.

The monitoring system 400 displays the process of cutting the workpieces 591a to 591f on the NC machine tool 500 and further receives the QR codes 592a to 592f taken by the photographing means 570 Analyzing and loading a corresponding project file to establish a machining plan and calculating the machining time.

The monitoring system 400 includes a display 410, a user command input unit 420, a screen output processing unit 430, a processed image processing unit 440, a processing time calculating unit 450, a memory 460, A processing plan setting unit 466, a character forwarding processing unit 470, and a communication unit 480. [

The display 410, the user command input unit 420, the screen output processing unit 430, the processing image processing unit 440, the processing time calculating unit 450, the character forwarding processing unit 470, and the communication unit 480 2 should be replaced with the above.

The memory 460 stores project files for the specific workpieces 591a to 591f and loads a project file to be transferred to the NC machine tool when necessary. The memory 460 also stores feedback information received from the NC machine tool 500. [

The shooting information analyzing unit 463 analyzes the image information taken by the photographing means 570 of the NC machine tool 500 and reads the QR codes 592a to 592f.

The processing plan establishing unit 466 checks whether the project file corresponding to the QR codes 592a to 592f read out by the photographing information analyzing unit 463 is stored in the memory 460 and outputs the QR codes 592a to 592f If the corresponding project file is stored in the memory 460, the corresponding project file is loaded and transmitted to the NC machine tool 500 through the communication unit 480, or the processing file is analyzed by analyzing the project file, And transmits the machining plan to the NC machine tool 500.

The process of predicting machining time after the machining plan is established by the NC machine tool operating system 500 according to another embodiment of the present invention will be described in more detail with reference to FIG.

11 is a flowchart for explaining an NC machine tool operating method according to another embodiment of the present invention. More specifically, a method of photographing and analyzing the workpieces 591a to 591f placed on the work table 590 of the NC machine tool 500, establishing a machining plan, and calculating the machining time is described.

Prior to the description, it is assumed that various project files are stored in advance in the memory 460 of the monitoring system 400 in the NC machine tool operating system shown in FIG. 9 in a state that they are matched with specific markers, that is, QR codes 592a to 592f .

The NC machine tool 500 is first set to the photographing mode before starting the processing for the workpieces 591a to 591f. That is, the tool replacing means 560 grasps the photographing means 570 which is placed at a specific position in the work space and mounts the tool on the tool attaching portion 550 (S1105). Thereafter, the user prepares a plurality of workpieces 591a to 591f in one set and mounts them in the work table 590 (S1110). Here, specific markings such as unique QR codes 592a to 592f are attached to the plurality of workpieces 591a to 591f mounted on the work table 590, respectively.

The photographing means 570 then photographs the workpieces 591a to 591f and transmits the photographed image information to the monitoring system 400 through the communication means 510.

The photographing means 570 may transmit the photographed image information by a short distance wireless communication method such as Bluetooth or the like, but if the electrical connection is made when the photographing means 570 is mounted on the tool mounting portion 550, It is quite possible.

When the photographing means 570 is mounted on the tool mounting portion 550, the work pieces 591a to 591f placed on the work table 590 while moving together with the tool mounting portion 550 are picked up one by one (QR codes 592a to 592f ), But the following process may be performed to obtain more smooth QR codes 592a to 592f.

That is, after the whole of the work table 590 is photographed in a state where the photographing means 570 is located at a position a certain distance away from the center of the work table 590, when the entire photographed image is transmitted to the monitoring system 400, The shooting information analyzing unit 463 first analyzes the entire captured image and grasps the position (coordinates) where the QR codes 592a to 592f exist. The photographing information analyzing unit 463 transmits the position information in which the QR codes 592a to 592f are present to the NC machine tool 500. The servo unit 530 causes the tool mounting unit 550 to move to the QR code 592a 592f are present) (i.e., moving the photographing means 570), so that the QR codes 592a to 592f at the corresponding positions are accurately photographed.

If photographing is performed in this process, only the positions where the workpieces 591a to 591f are placed can be photographed, and the photographing time can be shortened. For example, in FIG. 10, six workpieces 591a to 591f are shown filled up on the work table 590. However, if the three intermediate workpieces 591a to 591f are empty, The QR codes 592a to 592f can be obtained by photographing only the positions where the workpieces 591a to 591f exist without need.

Meanwhile, when the work pieces 591a to 591f to which the QR codes 592a to 592f are attached are photographed and the image information is transmitted to the monitoring system 400, the shooting information analyzing unit 463 analyzes the image information The processing plan establishing unit 466 reads out the project files corresponding to the QR codes 592a to 592f read out from the photographing information analyzing unit 463 in the memory 460 by reading the QR codes 592a to 592f Confirm that it is stored <S1120>.

If the project file corresponding to the QR code 592a to 592f is not confirmed in the memory 460, the machining plan creation unit 466 can not confirm the project file through the display 410, (S1160). Of course, if only the specific QR codes 592a to 592f among the QR codes 592a to 592f for the plurality of workpieces 591a to 591f are not confirmed, only the unrecognizable QR codes 592a to 592f are guided. Accordingly, the user confirms the machining impossible guidance screen so that the work is progressed without machining the work pieces 591a to 591f, or a different project file is selected and machining is performed for the corresponding work pieces 591a to 591f Or a new project file may be loaded in the memory 460 so as to be processed.

On the other hand, if the project file corresponding to the QR codes 592a to 592f is confirmed in the memory 460 (S1125), the machining plan establishing unit 466 loads the project files identified in the memory 460, Establish a plan <S1130>.

The machining plan establishment refers to a machining sequence for a plurality of workpieces 591a to 591f, a tool 590 required for machining, a procedure for replacing a specified tool 590, and the like.

The workpiece a 591a to the workpiece c 591c are arranged in this order while the workpiece a 591a is machined in the order of the tool 1 (T1) -tool 2 (T2) -tool 3 (T3) And workpiece b 591b requires machining in the order of tool 2 (T2) -tool 3 (T3) -tool 4 (T4) and workpiece c 591c is machined in the order of tool 1 (T1) (T3) - Tool 7 (T7), the machining plan can be established as follows in the most general way.

&Lt; Example 1 of Process Planning &

1step. Mounting tool 1 (T1) - Workpiece a Machining

2step. Mounting tool 2 (T2) - Workpiece a Machining

3step. Mounting Tool 3 (T3) - Machining a Machining

4step. Mounting tool 2 (T2) - Machining b machining

5step. Tool 3 (T3) mounting - Workpiece b machining

6step. Mounting tool 4 (T4) - Machining b machining

7step. Mounting tool 1 (T1) - Workpiece c Machining

8step. Tool 3 (T3) mounting - Workpiece c machining

9step. Mounting tool 7 (T7) - Workpiece c Machining

As can be seen in Example 1 above, machining can be performed with the workpieces 591a to 591c as a reference sequence. This reflects the project file for the workpiece a 591a, the project file for the workpiece b 591b, and the project file for the workpiece c 591c in the order of loading.

However, it can be seen that some of the tools 580 necessary for machining the work pieces a, b, c (591a, 591b, 591c) partially overlap. Therefore, a machining plan can be established as follows.

&Lt; Example 2 of Process Planning &

1-1step. Mounting tool 1 (T1) - Workpiece a Machining

1-2 steps. Tool 1 (T1) Retention - Workpiece c Machining

2-1step. Mounting tool 2 (T2) - Workpiece a Machining

2-2step. Maintaining the tool 2 (T2) - Processing the workpiece b

3-1step. Mounting Tool 3 (T3) - Machining a Machining

3-2step. Tool 3 (T3) Retention - Workpiece b Machining

3-3 step. Maintaining the tool 3 (T3) - Processing the workpiece c

4step. Mounting tool 4 (T4) - Machining b machining

5step. Mounting tool 7 (T7) - Workpiece c Machining

In the above example 2, instead of changing the tool 580 to finish the machining of the work a (591a) with the tool 1 (T1) mounted thereon and then the machining of the work a (591a) T1), the workpiece c (591c) is processed first. Similarly, the workpieces a, b, and c (591a, 591b, and 591c) requiring the tool 3 (T3) are all machined with the tool 3 (T3) mounted thereon.

Of course, in this machining plan, it is necessary to return the workpiece a (591a) after machining the next workpieces (591b, 591c) in a state in which the machining of the workpiece (591a) Since the process of replacing the tool 580 is more time consuming than the movement of the tool 580, the tool 580 needs to be removed after the installation of one tool 580, It is obvious that it is more effective to finish one at a time. That is, in the preceding example 1, it is necessary to mount 9 tools 580, but in this example 2, it is only necessary to install 5 tools 580, so that it is possible to drastically shorten the machining time by reducing the tool 580 replacement work.

This processing plan can be established by dividing the project file into NC blocks and rearranging it, instead of sequentially executing each project file when a plurality of project files are loaded. That is, the machining plan establishing unit 466 establishes an optimum machining plan in accordance with an algorithm previously installed.

On the other hand, when one tool 580 finishes the work for a predetermined time or a predetermined machining length, another tool 580 may be used to replace the tool 580 due to wear and the like, and the machining plan establishing unit 466 Consider all of them and establish a machining plan.

That is, the machining length or machining time for each tool 580 is cumulatively recorded in the memory 460 of the monitoring system 400. When the machining plan establishing unit 466 establishes the machining plan, , It is necessary to establish a machining plan so that the replacement tools T11 to T20 can be used. An example of the machining plan thus established is described below.

&Lt; Example 3 &

1-1step. Mounting tool 1 (T1) - Workpiece a Machining

1-2 steps. Tool 1 (T1) Retention - Workpiece c Machining

2-1step. Mounting tool 2 (T2) - Workpiece a Machining

2-2step. Maintaining the tool 2 (T2) - Processing the workpiece b

3-1step. Mounting Tool 3 (T3) - Machining a Machining

3-2step. Tool 3 (T3) Retention - Workpiece b Machining

3-3 step. Mounting tool 13 (T13) - Workpiece c Machining

4step. Mounting tool 4 (T4) - Machining b machining

5step. Mounting tool 7 (T7) - Workpiece c Machining

That is, in the above example 3, it is expected that the tool 3 (T3) reaches the use limit after the completion of the 3-2 step, and the tool 13 (T13) which is the replacement tool is used at the step requiring the next tool 3 So as to establish a machining plan as much as possible.

When the machining plan is established in the machining plan establishing unit 466, the machining time calculating unit 450 analyzes the project file according to the established machining plan, calculates the estimated machining time and outputs the machining schedule in step S1135. The machining time calculating unit 450 can calculate the predicted machining time by extracting the predicted machining length (total machining length) and the predicted machining speed. The calculation of the estimated machining time is described in detail in the preceding description with reference to Fig. 3, so avoid duplicate explanations.

Thereafter, the machining plan creation unit 466 rearranges the NC blocks of the plurality of project files and transmits a machining plan (also stored as a project file) newly established to the NC machine tool 500 through the communication unit 480, The numerical control means 520 of the NC machine tool 500 operates the tool changing means 560 to separate the photographing means 570 mounted on the tool mounting portion 550 into a separate mounting means, The tool 580 is mounted in the order in which the tool 580 is mounted, and then the tool 580 is moved and rotated to start the machining (S1145).

The numerical control means 520 of the NC machine tool 500 interprets and distributes the project file through the machining program to control the servo unit 530 and the spindle unit 540 so as to feed the tool axis according to the command, 580 are rotated to perform the cutting operation. When the cutting operation is started by contacting the tool 580 with the workpieces 591a to 591f, the specific markings attached to the workpieces 591a to 591f, that is, the QR codes 592a to 592f are also cut, .

The numerical control means 520 of the NC machine tool 500 controls the servo unit 530 and the spindle unit 540 and receives feedback information from the servo unit 530 and the spindle unit 540, (400). The feedback information to be transmitted from the servo unit 530 and the spindle unit 540 to the numerical control means 520 may be real-time coordinate information of the co-establishment or velocity information. The feedback information may also be operating status information including signals for machining, stopping, or error occurrence.

When the numerical control means 520 of the NC machine tool 500 receives the feedback information in real time from the servo unit 530 and the spindle unit 540 and transmits the feedback information to the monitoring system 400, The controller 480 stores the received feedback information in the memory 460 (S1150).

The feedback information received from the NC machine tool 500 is stored in the memory 460 and displayed on the display 410. The machining time calculator 450 calculates the estimated machining time by re- Screen output <S1155>.

That is, the estimated machining time is calculated and displayed on the screen before the start of machining. However, when actual machining is performed, an unexpected situation occurs and the machining time may differ from the theoretical estimated machining time. The process of delivering the estimated machining time through the feedback information has been described in detail above with reference to FIG. 3, so avoid duplicate descriptions.

On the other hand, the monitoring system 400 can transmit the operation state of the NC machine tool 500 to the administrator portable terminal 600 and guide the manager portable terminal 600 in the event of an error so that quick follow-up can be performed .

As described in detail above, according to the NC machine tool operating system and its operating method according to another embodiment of the present invention, specific markings such as QR codes 592a to 592f are attached to a plurality of workpieces 591a to 591f , The project file matched to the QR codes 592a to 592f can be automatically loaded by photographing before starting the processing, so that it is convenient that the user does not need to input or select the project file troublesomely.

In addition, machining using a variety of tools 580 may be required for the plurality of workpieces 591a to 591f. For this purpose, the machining plan is established by rearranging the NC blocks of the project file to minimize the replacement of the tool 580 The overall working time can be greatly shortened and the working efficiency can be maximized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And additions should be considered as falling within the scope of the claims of the present invention.

100: Monitoring system
110: Display
120: User command input
130: Screen output processor
140: Processed image processing unit
150: machining time calculating section
160: Memory
170:
180:
200: NC machine tool
210: Communication means
220: Numerical control means
230: Servo Unit
240: Spindle unit
300: Manager Portable terminal
400: Monitoring system
410: Display
420: User command input section
430: Screen output processor
440: Processed image processing section
450: machining time calculating section
460: Memory
463: photographing information analysis section
466: Process Planning Section
470:
480:
500: NC machine tool
510: Communication means
520: Numerical control means
530: Servo Unit
540: Spindle unit
550: Tool mounting portion
560: tool replacement means
570: means of photography
580: Tools
T1 to T20: Tools 1 to 20
590: Work table
591a to 591f:
592a to 592f: QR code
600: Manager Portable terminal

Claims (7)

delete delete delete delete A communication means for connecting a monitoring system and a communication channel via a network and transmitting and receiving data;
A servo unit for moving the tool axis to a specific coordinate;
A spindle unit for rotating a tool axis to perform a cutting operation on the workpiece;
And a numerical control means for embedding a predetermined machining program and numerically controlling the servo unit and the spindle unit by interpreting and distributing a project file stored in advance through a machining program or inputted from the monitoring system, And
A communication unit for transmitting a user command to the NC machine tool in association with the NC machine tool or receiving feedback information from the NC machine tool;
A memory for storing the project file or storing the feedback information received from the NC machine tool;
A processing time calculating unit for calculating a predicted processing time by analyzing a project file stored in the memory or restoring a predicted processing time by reflecting the feedback information;
A screen output processing unit for processing the predicted machining time so as to output the screen;
A photographing information analyzing unit for reading a specific marking from photographing image information of a plurality of workpieces;
A user command input unit for receiving selection information and a user command;
A plurality of project files corresponding to the specific markers read by the photographing information analyzing unit are loaded in the memory, and the loaded plurality of project files are analyzed to include a tool mounting order and a machining order for the plurality of workpieces And a machining plan establishing unit that establishes a machining plan for performing machining,
Wherein the machining time calculating unit analyzes the project file to calculate an expected machining time based on a predicted machining length and a predicted machining speed,
Wherein the feedback information received from the NC machine tool includes real-time coordinate information and velocity information of the tool,
Calculating a finished machining length and an actual machining speed on the basis of real time coordinate information and velocity information of the tool included in the feedback information when the machining time calculating unit calculates the estimated machining time, Calculating a remaining machining time with respect to the machining length,
The machining time calculating unit calculates an expected machining time for a project file generated in accordance with the machining plan established by the machining plan establishing unit,
When the feed speed override command is input through the user command input unit, the feed speed override command is transmitted to the NC machine tool through the communication unit, and the numerical control unit controls the servo unit to perform machining according to the command , Feedback information of the servo unit operated at a feed rate changed in accordance with the feed rate override command is stored in the memory,
The machining time calculating unit also calculates the remaining machining time with respect to the remaining machining length by reflecting the feed speed override command,
The character sending processing unit of the monitoring system transmits the estimated processing time in which the character processing processing unit is re-calculated in real time in association with the communication unit to the administrator portable terminal by a predetermined time unit, or immediately when the error occurs, The daily, weekly, and monthly work patterns of the equipment are analyzed and provided as a graph or a table through the feedback information,
The machining length or machining time for each tool is cumulatively recorded in the memory,
The machining plan establishing section establishes a machining plan so that a replacement tool can be used if a certain tool is predicted to reach a limit during the machining plan setting, and after machining a tool, A machining plan is established so that the next machining by other tool mounting is performed, thereby minimizing tool replacement and shortening the entire machining time. delete delete

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