JP2004054701A - Machine operational status monitoring system, numerical value control device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To grasp information which can not be determined within a numerical value control device, for example, causes of a machine's stop, as well as information on the operating status of the machine. <P>SOLUTION: A system comprises the numerical value control device controlling a machine tool and a personal computer connected to the above control device via a network. The numerical value control device monitors the operating status of the machine tool and transmits the data on the operational status to the personal computer. The personal computer collects the data on the operational status of the machine tool and records them. The numerical value control device monitors the operational status of the machine tool (processing, stop and the generation of an alarm) (S1 to S3) and transmits the data on the operational status to the personal computer (S4 to S7). In case that an operator inputs the causes of the stop of the machine tool when the machine tool stops, a selection screen is displayed on a display part (S9) by the operator's operating the key input part of an operation panel (S8), and the operator can select the causes of the stop, input letters (S10 to S13) and transmit the data on the causes of the stop to the personal computer (S14 and S15). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a machine operation status monitoring system, a numerical control device, and a program for monitoring the operation status of a machine controlled by a numerical control device such as a machine tool.
[0002]
[Problems to be solved by the invention]
For example, in a factory equipped with a plurality of machine tools controlled by a numerical control (NC) device, a numerical control device of each machine is connected to a personal computer (operation status monitoring device) via a network for production management and the like. Then, a system is provided for notifying the personal computer of the operating status of the machine grasped by each numerical control device, and collecting and recording the operating status of the machine on the personal computer. In this case, the operation status of the machine that can be grasped by the numerical control device, that is, recorded by the personal computer, includes the operations (operation start, operation stop, spindle rotation, etc.) that the numerical control device instructs the machine, and the numerical control device Information obtained from sensors (ON / OFF of limit switch, load on spindle, etc.).
[0003]
By the way, the use of the data of the operation status of the machine recorded in the personal computer includes (1) grasping the operation ratio of the machine, and (2) analyzing the cause when the operation ratio is low. Of the above, the operation rate of (1) is not a problem if the time during machining of the machine is known, but the cause of (2) is insufficient for analysis with only information that can be determined by the numerical controller. At this time, as a cause of a long machine stop time, although the occurrence of an alarm (the occurrence of an abnormality such as a motor failure) can be grasped by the numerical controller, adjustment of the jig due to poor machining accuracy and negligence of the operator Such a cause cannot be determined by the numerical controller and is not recorded on the personal computer.
[0004]
The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to grasp information that cannot be determined inside a numerical control device, such as a machine stop cause, among information on a machine operation state. An object of the present invention is to provide a machine operation status monitoring system, a numerical control device, and a program.
[0005]
[Means for Solving the Problems]
The information that is required when analyzing the operating rate, for example, using the collected and recorded data on the operating status of the machine, but cannot be grasped inside the numerical control device, includes a jig by a worker due to poor machining accuracy. Adjustment, replacement of tools by the worker, replenishment of the work by the worker, investigation by the worker when a trouble occurs, suspension of the worker to support another work, and the like. Most of them are related to the work of the worker, and it is difficult for the operator to easily grasp even if a sensor is added separately. Can be. The present inventor has achieved the present invention by paying attention to this point.
[0006]
That is, in order to achieve the above object, a machine operation status monitoring system of the present invention includes a numerical control device having a function of controlling a machine such as a machine tool and monitoring the operation status of the machine, An operation status monitoring device that is connected to the control device and collects and records the data of the operation status of the machine transmitted from the numerical control device, wherein the numerical control device transmits information on the operation status of the machine. It is characterized in that input means is provided for the operator to input information that cannot be determined by the numerical control device, and the input information is transmitted to the operation status monitoring device. Invention).
[0007]
According to this, the information about the operation status of the machine, which is necessary for analysis and the like but cannot be determined inside the numerical control device, is obtained by input means provided in the numerical control device so that the information can be well understood. Can be entered. Then, since the input information input in the numerical controller is transmitted to the operation status monitoring device, the operation status monitoring device can collect and record the data of the operation status of the machine including the input information. It becomes possible.
[0008]
At this time, the information input by the input means can be information on the cause of stoppage when the machine is stopped (the invention of claim 2). Information that is useful for use can be collected and recorded in the operation status monitoring device.
[0009]
The numerical controller according to claim 3 of the present invention controls a machine such as a machine tool, and has a function of monitoring the operation status of the machine. It is characterized in that an input means is provided for an operator to input information that cannot be determined. Further, the program according to claim 8 of the present invention controls a numerical control device having a function of controlling a machine such as a machine tool and monitoring the operation status of the machine in the information regarding the operation status of the machine. It is characterized in that it functions as input means for an operator to input information that cannot be determined.
[0010]
According to this, among the information on the operation status of the machine, the operator who knows the information well can input the information which is necessary for analysis or the like but cannot be determined internally by the input means. Therefore, it is possible to grasp information that cannot be determined inside the numerical control device, such as the cause of the machine stop, among the information on the operation status of the machine.
[0011]
At this time, the information input by the input means can be information on the cause of stoppage when the machine is stopped (the inventions of claims 4 and 9). It is possible to grasp useful information to be used for analysis of the cause.
[0012]
Here, in general, the numerical control device includes an operation panel having a display unit and a key input unit as a man-machine interface. Therefore, more specifically, in the numerical control device according to claim 3 or 4, the input means is operated by a key input of the operation panel while a selection screen of information to be input is displayed on a display unit of the operation panel. The selection operation can be performed by the section (the invention of claim 5). Further, in the program according to claim 8 or 9, when the numerical control device is caused to function as an input means, a selection screen of information to be input is displayed on a display unit provided on an operation panel, and the operation is performed in that state. The selection operation can be performed by the key input section of the panel (the invention of claim 10). According to this, when inputting information, the operator only has to look at the selection screen displayed on the display unit and perform a selection operation with the key input unit, and input can be performed easily.
[0013]
Further, the numerical control device may be provided with a storage means for storing data of the operation status of the machine (the invention of claim 6), and the data of the operation status of the machine is transmitted to an external operation status monitoring device. A data transmitting means may be provided (the invention of claim 7). In the above-mentioned program, the numerical control device may be made to function as a storage unit for storing data on the operation status of the machine (the invention according to claim 11). You may make it function as a data transmission means which transmits to a monitoring apparatus (the invention of Claim 12). In any case, data on the operating status of the machine including the input information can be collected and recorded, and can be used for analysis and the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment in which the present invention is applied to a machine tool operation status monitoring system will be described below with reference to the drawings. First, FIG. 2 schematically shows a configuration of a system according to the present embodiment. Here, a plurality of (three in FIG. 2) machine tools 1 are provided in a factory. I have. Each of these machine tools 1 is provided with (or integrally provided with) a numerical control (NC) device 2 according to the present embodiment. Each numerical controller 2 is connected via a network 4 to a personal computer 3 as an operation status monitoring device.
[0015]
Although not shown or described in detail, the machine tool 1 is composed of, for example, a machining center. The machine tool 1 is configured to hold a workpiece (work) on a base and to move the table freely, and to rotationally drive a tool attached to a spindle. And a tool changing device for automatically changing a tool to be mounted on the spindle, and the outer periphery thereof is covered with a splash cover 1a.
[0016]
Each mechanism of the machine tool 1 uses a plurality of servomotors as drive sources, and is driven and controlled by the numerical controller 2 (an NC control unit described later) via a motor drive circuit (servo amplifier). It has become. Each motor is provided with an encoder so that feedback control is performed. Further, the numerical control device 2 controls valves and the like provided on the machine tool 1 and outputs an abnormality detection signal (alarm signal) from various sensors provided on the machine tool 1. Is to be entered.
[0017]
The numerical controller 2 according to the present embodiment mainly includes a microcomputer including a CPU 5, a ROM 6, a RAM 7, and the like, and further includes an NC connected to the CPU 5, as schematically shown in FIG. It is provided with a control unit 8, a communication unit 9, an operation panel 10, and the like. The NC controller 8 is connected to the machine tool 1 (motor drive circuit) and controls each mechanism (motor, valve, etc.). The communication unit 9 is connected to the personal computer 3 via the network 4 and communicates with the personal computer 3.
[0018]
As shown in FIG. 4, the operation panel 10 includes a display unit 11 and a key input unit 12. The display unit 11 is controlled by the CPU 5 and necessary for an operator. Information (such as the operating status of the machine tool 1) is displayed. The key input unit 12 includes a number of keys, and a key input signal is input to the CPU 5 by an operation of an operator. At this time, as shown in FIG. 4, the key input unit 12 is provided with a detailed input key 12a, a cursor key 12b, a large number of character keys 12c, a transmission key 12d, and the like. The panel 10 functions as a part of the input means.
[0019]
The ROM 6 stores an overall control program and the like including a monitoring program to be described later. The RAM 7 stores input NC programs, data of necessary parameters, and the like. The NC program and data can be input by reading data on a recording medium by an input / output device (not shown), or from the personal computer 3 via the communication unit 9. .
[0020]
The CPU 5 supplies a command signal to the NC control unit 8 according to the NC program or the like based on an input operation of the key input unit 12 by an operator, and the NC control unit 8 controls the machine tool 1 based on the command signal. Under the control, predetermined processing is performed on the workpiece. Further, the CPU 5 monitors the operation status of the machine tool 1 (machining, stop, occurrence of alarm, etc.), displays the operation status on the display unit 11, and transmits the operation status to the personal computer 3 via the communication unit 9. The operation status data (the status and time data of the machine tool 1) is transmitted. Therefore, the communication unit 9 functions as a data transmission unit.
[0021]
The personal computer 3 collects and records (accumulates) data on the operating status of each machine tool 1 transmitted from each numerical controller 2. Further, the personal computer 3 is configured to be able to display, for example, one day's operation status data recorded (a specific example is partially illustrated in FIG. 5) on a display or to print out the data. Using the data, the operating rate of the machine tool 1 can be grasped, and the cause of the low operating rate can be analyzed.
[0022]
The numerical controller 2 monitors the operation status of the machine tool 1 and transmits the data to the personal computer 3 as described above by executing the software configuration, that is, the program for monitoring the operation status. However, at this time, in the present embodiment, the following functions are realized by the program.
[0023]
That is, as described later in the operation description (flowchart description), when monitoring the operation status of the machine tool 1, the numerical control device 2 includes information on the operation status of the machine tool 1 in the numerical control device 2. In this case, information that cannot be determined, ie, in this case, information on the cause of the stoppage of the machine tool 1 when stopped, has a function of a function as an input means for allowing an operator to input the information. At this time, specifically, in the present embodiment, when the operator operates the detailed input key 12a of the key input unit 12 of the operation panel 10 by the operator, the numerical control device 2 displays on the display unit 11 of the operation panel 10. A selection screen for information to be input is displayed, and a selection operation is performed by the key input unit 12 in that state.
[0024]
More specifically, as shown in FIG. 4, the numerical control device 2 displays “1. jig adjustment”, “2. tool change”, “3. The options "supply" and "4. other" are displayed, and the operator operates the cursor key 12b to select one of them. When "4. Others" is selected, a specific stop cause other than 1 to 3 can be freely input by operating the character key 12c of the key input unit 12 by the operator. .
[0025]
Further, when the operator operates the transmission key 12d of the key input unit 12 after inputting the stop cause, the numerical controller 2 also transmits the input stop cause information to the personal computer 3 via the communication unit 9. , So that it can function as a data transmission unit. The personal computer 3 also collects and records information on the cause of the stop (see FIG. 5).
[0026]
Next, the operation of the above configuration will be described with reference to FIGS. The flowchart of FIG. 1 shows a processing procedure related to monitoring of the operation status of the machine tool 1, which is executed by the numerical controller 2 (CPU 5). Here, the operation status of the machine tool 1 that the numerical control device 2 can grasp by itself includes machining start and stop, which are operations that the numerical control device 2 has instructed to the machine tool 1, and the numerical control device 2 has a sensor. There is an alarm (abnormal) generated from a class. Further, the numerical controller 2 transmits the data to the personal computer 3 when there is a change in the operation status.
[0027]
That is, as described above, when monitoring the operation status of the machine tool 1, the CPU 5 of the numerical control device 2 determines whether processing has been started (step S1), processing has been stopped (step S2), or an alarm has been generated. (Step S3) is always determined. Now, when the processing is started (Yes in step S1), the operation status is set to “processing” (step S4), and the data of the operation status is transmitted to the personal computer 3 together with the time data (step S7).
[0028]
Similarly, when the machining is stopped (Yes in step S2), the operation status is set to “stop” (step S5), and when an alarm occurs (Yes in step S3), the operation status is set to “ An alarm is transmitted (step S6), and the operation status data is transmitted to the personal computer 3 together with the time data (step S7). During the monitoring of the operation status, it is always monitored whether the detail input key 12a of the key operation unit 12 of the operation panel 10 is turned on (step S8).
[0029]
If the operator wants to input the cause (reason) when the machine tool 1 is stopped, the detailed input key 12a is turned on (Yes in step S8). Then, on the display unit 11 of the operation panel 10, a selection screen for selecting a stop cause as shown in FIG. 4 is displayed (step S9). If the cause of the stop is any one of “1. jig adjustment”, “2. tool change”, and “3. work replenishment”, the operator operates the cursor key 12b (at step S10). Yes), the cause of the stop can be selected (step S11).
[0030]
Further, when the cause of the stop is other than the above three causes (for example, a cause related to the situation of the worker such as the worker going to support another work), the worker operates the character key 12c. By doing so (Yes in step S12), the cause of the stop can be freely input (step S13). When the operator operates the transmission key 12d after selecting or inputting the cause of the stop (Yes in step S14), the data of the cause of the stop is transmitted to the personal computer 3 (step S15). Thereafter, the screen of the display unit 11 is switched by performing the screen switching operation (Yes in step S16) (step S17).
[0031]
Thus, the personal computer 3 collects the transmitted operation status data, and records and retains the history along with the time. FIG. 5 shows a specific example of the operation status data of the machine tool 1 recorded on the personal computer 3, and the operation status such as machining, stop, and alarm is recorded with the time. , And "support for another job" are also recorded. The one-minute stop at 9:09, 9:19, or the like is a stop for exchanging the next work after processing of one work is completed, and is a normal (necessary) stop time. Therefore, there is no need to input the cause.
[0032]
As described above, according to the present embodiment, out of the information on the operation status of the machine tool 1, the stop which is information that is necessary for analysis of the cause when the operation rate is low but cannot be determined inside the numerical control device 2. An operator who is familiar with the information can input the cause information through the operation panel 3. Then, since the input information is transmitted to the personal computer 3, it becomes possible for the personal computer 3 to collect and record the operation status data of the machine tool 1 including the input information.
[0033]
As a result, according to the present embodiment, it is possible to grasp information that cannot be determined inside the numerical control device 2, such as the cause of the stoppage of the machine tool 1, among information on the operation status of the machine tool 1. It has an excellent effect. Also, in the present embodiment, in particular, the selection screen of the information to be input is displayed on the display unit 11 of the operation panel 10 and the selection operation is performed by the key input unit 12, so that the operator can input information. It is only necessary to perform a simple selection operation with the key input unit 12 while looking at the selection screen displayed on the display unit 11, and the advantage that the input can be easily performed can be obtained.
[0034]
In the above embodiment, the operation status data is automatically transmitted from the numerical controller 2 to the personal computer 3 whenever the operation status of the machine tool 1 changes. Data may be transmitted at a fixed time), or data may be transmitted from the numerical controller 2 in response to a data transfer request from the personal computer 3. In the present invention, a storage means may be provided in the numerical control device 2 to store data on the operating status of the machine tool 1 so that output (or analysis or the like) can be freely performed.
[0035]
Further, in the above embodiment, the information on the cause of the stop is input as the information on the operating state of the machine that cannot be determined by the numerical control device. ) May be configured to be input. In addition, the operation status monitoring device is not limited to a personal computer, and may be configured by a dedicated device. The machine is not limited to a machine tool, and can be applied to all machines that are driven and controlled by a numerical control device. For example, the present invention can be implemented with appropriate modifications without departing from the gist.
[0036]
【The invention's effect】
As is apparent from the above description, according to the machine operation status monitoring system and the numerical control device and the program of the present invention, among the information on the machine operation status, judgment inside the numerical control device such as the cause of the machine stop is performed. This provides an excellent effect that information that cannot be obtained can be grasped.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, and is a flowchart showing a processing procedure relating to monitoring of an operation state of a machine tool executed by a CPU of a numerical controller. FIG. 2 is a diagram schematically showing a system configuration. FIG. 3 is a block diagram schematically showing the electrical configuration of the numerical control device. FIG. 4 is a front view schematically showing the configuration of an operation panel. FIG. 5 is a diagram showing an example of recording of an operation state.
In the drawings, 1 is a machine tool (machine), 2 is a numerical control device, 3 is a personal computer (operation status monitoring device), 4 is a network, 5 is a CPU, 6 is ROM, 7 is RAM (storage means), and 8 is NC. A control unit, 9 is a communication unit (communication means), 10 is an operation panel (input means), 11 is a display unit, and 12 is a key input unit.

Claims (12)

A numerical control device having a function of controlling a machine such as a machine tool and monitoring the operation status of the machine, and collecting data of the operation status of the machine connected to one or more numerical control devices and transmitted from the numerical control device Operating status monitoring system for a machine, comprising: an operating status monitoring device for recording.
The numerical control device is provided with input means for an operator to input information that cannot be determined by the numerical control device among information on the operation status of the machine, and transmits the input information to the operation status monitoring device. An operating status monitoring system for a machine, characterized in that the operating status is monitored. The machine operation status monitoring system according to claim 1, wherein the information input by the input unit is information on a cause of stoppage of the machine when the machine is stopped. A numerical controller that controls a machine such as a machine tool and has a function of monitoring an operation state of the machine,
A numerical control device, comprising: input means for allowing an operator to input information, which cannot be determined internally, among information on the operation status of the machine. 4. The numerical control device according to claim 3, wherein the information input by the input unit is information of a stop cause when the machine stops. The input means includes an operation panel having a display unit and a key input unit, and a selection operation is performed by the key input unit while a selection screen for information to be input is displayed on the display unit. 5. The numerical control device according to claim 3, wherein the numerical control is performed. The numerical control device according to claim 3, further comprising a storage unit configured to store operation status data of the machine. 7. The numerical control device according to claim 3, further comprising a data transmission unit that transmits data of the operation status of the machine to an external operation status monitoring device. A numerical control device having a function of controlling a machine such as a machine tool and monitoring an operation state of the machine,
A program causing an operator to input information that cannot be determined internally among information on the operation status of the machine. 9. The program according to claim 8, wherein the information input by the input unit is information of a stop cause when the machine stops. In making the numerical control device function as the input unit, a selection screen for information to be input is displayed on a display unit provided on an operation panel of the numerical control device, and in that state, a key input unit of the operation panel is displayed. The program according to claim 8, wherein a selection operation is performed by: 11. The non-transitory computer-readable storage medium according to claim 8, wherein the numerical control device functions as a storage unit that stores data on an operation status of the machine. 12. The non-transitory computer-readable storage medium according to claim 8, wherein the numerical control device functions as a data transmission unit that transmits data of the operation status of the machine to an external operation status monitoring device.

Images