JP7604417B2 - Press machine and method for displaying the operation status of the press machine - Google Patents

Description

The present invention relates to a press machine and a method for displaying the operating status of a press machine.

In industrial machinery, in order to improve yields and prevent serious breakdowns, for example, there is a method of comparing the output value of a sensor that monitors the operating state of the machine with a predetermined threshold value and detecting abnormalities in components based on the results. In recent years, technology using AI (artificial intelligence) has also been spreading to industrial machinery, and it is expected that it will be used to predict breakdowns (Patent Documents 1 and 2).

These AI-based failure prediction systems use output information from sensors related to failures in industrial machinery, such as press machines, as explanatory variables to perform machine learning to generate a learning model, and then use the learning model to output failure information and the degree of anomaly for the press machine.

The fault information and degree of anomaly output here are expressed as evaluation values that indicate the degree of fault or anomaly, with a higher evaluation value indicating a higher possibility that it is a sign of a fault or anomaly. These fault prediction systems can then issue an alert when the evaluation value exceeds a threshold value.

JP 2017-120649 A JP 2020-62650 A

However, it is difficult for press machine operators to determine the level of urgency based only on the evaluation values calculated by AI or on values related to operating conditions other than those of AI, and it is also difficult to decide what value to set the threshold value to.

Therefore, the present invention provides a press machine and a method for displaying the operating status of a press machine that allows an operator to easily visually determine abnormalities in the operating status.

The present invention has been made to solve at least some of the problems described above, and can be realized in the following aspects or application examples.

[1] One aspect of the press machine according to the present invention is
In a press machine for pressing a workpiece,
a display unit that displays a status display image extending in a band shape that indicates an operating status of the press machine for a predetermined period up to the present;
A calculation unit that calculates two or more types of evaluation values that evaluate the operating state per unit time;
a color arrangement unit that mixes two or more colors corresponding to the two or more types of evaluation values ;
Equipped with
the display unit displays a time series change in the driving state during the predetermined period by changing a color of the belt-shaped state display image in an extension direction,
The two or more colors are each selected by the color arrangement unit as chromatic colors that are angularly spaced apart on a hue circle, and are set to a gradation value according to the magnitude of each evaluation value;
The status display image is characterized in that the color mixed by the color arrangement unit is displayed in a portion representing the current driving status for each unit time.

According to one embodiment of the press machine, the time series changes in the operating status up to the present are displayed by a change in color in the extending direction of the band-shaped status display image, making it easier for the operator to visually determine abnormalities in the operating status of the press machine.
In addition, according to one aspect of the press machine, by mixing colors in the color scheme section, it is possible to make it easier for the operator to recognize the time-series changes in the operating state up to the present as changes in two or more colors and gradation values.

[ 2 ] In one aspect of the press machine,
The two or more types of evaluation values are three types,
The two or more colors may be three colors: red, green and blue.

According to one aspect of the press machine, by using the three primary colors of light, red, green, and blue, which correspond to the three types of evaluation values, the processing in the color arrangement section is simplified and the processing load is reduced.

[ 3 ] In one aspect of the press machine,
The two or more types of evaluation values may include at least one evaluation value calculated by machine learning.

According to one aspect of the press machine, the machine learning evaluation value can be reflected in the status display image, gradually improving its accuracy as an indicator of the operating status.

[ 4 ] In one aspect of the press machine,
The two or more types of evaluation values may include an abnormality degree of the press machine calculated by machine learning, a production stability of the press machine, and a manual operation frequency of the press machine.

According to one aspect of the press machine, by reflecting not only the degree of abnormality calculated by machine learning but also the production stability and manual operation frequency of the press machine in the status display image, it is possible to suppress sudden color changes.

[ 5 ] In one aspect of the press machine,
The two or more colors are red, green, and blue,
The greater the red gradation value, the greater the abnormality level value indicating that the operating state is abnormal;
The production stability value indicating that the operating state is more stable is assigned to the green gradation value,
The manual operation frequency value may be assigned such that the larger the blue gradation value, the more stable the driving state is.

According to one aspect of the press machine, even when the abnormality level is high and the red gradation value is high, the display unit can display an appropriate color according to the actual operating state by combining green and blue gradation values that indicate a stable operating state.

[ 6 ] In one aspect of the press machine,
the state display image is configured by arranging unit images, the number of which is calculated by dividing the predetermined period by the unit time, continuously in the extension direction;
Each of the unit images may be displayed in a color that is mixed by the color arrangement unit for each unit time.

According to one aspect of the press machine, by arranging unit images in succession, each having a length corresponding to the width of the band-shaped status display image and the unit time, the operating status from the start time of a specified period to the current time can be displayed as a time-series change in color for each unit time, making it easy for the operator to grasp the color changes.

[ 7 ] In one aspect of the press machine,
The status display image can display the current driving status at either one of the two ends in the extension direction, and can display the driving status corresponding to elapsed time from the end displaying the current driving status to the other end.

According to one aspect of the press machine, the operating state corresponding to the elapsed time is displayed in the extension direction of the status display image, making it easier for the operator to grasp the time series changes in the operating state.

[ 8 ] In one aspect of the press machine,
The display unit can display the status display image, an image of information related to operation of the press machine, and an abnormality degree display image that displays the degree of abnormality of the press machine.

According to one aspect of the press machine, the display unit displays a status display image, an operation-related information image, and an abnormality level display image, making it easy for the operator to understand the relationship between the information obtained from each image.

[9] One aspect of the method for displaying an operating state of a press machine according to the present invention is to
calculating two or more types of evaluation values for evaluating an operating state per unit time of a press machine which presses a workpiece material, mixing two or more colors corresponding to the two or more types of evaluation values, and displaying a time series change in the operating state over a predetermined period up to the present on a display unit as a change in color in an extension direction of a band-shaped status display image;
The two or more colors are selected as chromatic colors that are angularly spaced apart on a hue circle, and are set to gradation values according to the magnitude of each evaluation value;
The status display image is characterized in that the mixed color is displayed at each unit time in a portion representing the current driving status.

According to one aspect of the method for displaying the operating status of a press machine, the time series changes in the operating status up to the present are displayed by changing the color in the extension direction of a band-shaped status display image, making it easier for the operator to visually determine abnormalities in the operating status of the press machine.

[ 10 ] In one aspect of the method for displaying an operating state of a press machine,
The display unit can display the status display image, an image of information related to operation of the press machine, and an abnormality degree display image that displays the degree of abnormality of the press machine.

According to one aspect of the press machine operating status display method, the display unit displays a status display image, an operation-related information image, and an abnormality level display image, making it easy for the operator to understand the relationship between the information obtained from each image.

According to one aspect of the press machine and one aspect of the method for displaying the operating state of a press machine of the present invention, the time series changes in the operating state up to the present are displayed by color changes in the extension direction of a band-shaped status display image, making it easy for the operator to visually determine abnormalities in the operating state of the press machine.

FIG. 1 is a block diagram of a configuration of a press machine and a control device according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of a display unit of the press machine according to the present embodiment. FIG. 13 is an enlarged view of a portion of the status display image. FIG. 13 is a diagram showing an example of another form of the status display image. FIG. 13 is a diagram showing an example of another form of the status display image. FIG. 13 is a diagram showing an example of another form of the status display image. 4 is a flowchart of a method for displaying an operation state of a press machine according to the present embodiment.

Below, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that the embodiments described below do not unduly limit the content of the present invention described in the claims. Furthermore, not all of the configurations described below are necessarily essential components of the present invention.

The press machine according to this embodiment is a press machine that presses a workpiece material and is equipped with a display unit that displays a status display image extending in a band shape that represents the operating state of the press machine over a predetermined period up to the present, and the display unit is characterized in that it displays the time series changes in the operating state over the predetermined period by changing the color of the band-shaped status display image in the direction in which it extends.

The method for displaying the operating status of a press machine according to this embodiment is characterized in that the time series changes in the operating status of a press machine that presses a workpiece material over a predetermined period up to the present are displayed on the display unit as color changes in the extension direction of a band-shaped status display image.

An overview of a press machine 1 will be described with reference to Figures 1 and 2. Figure 1 is a block diagram of a configuration of the press machine 1 and a control device 20 according to this embodiment, and Figure 2 is a diagram showing an example of a display unit 22 of the press machine 1 according to this embodiment.

1-1. Overview of the Press Machine The press machine 1 in Fig. 1 is a press machine 1 that presses a workpiece material. The press machine 1 includes a slide 3 that can be raised and lowered relative to a bolster 2, a drive mechanism (not shown) that drives the slide 3 (e.g., a servo motor, a crankshaft, a connecting rod, etc.), and a control device 20. The press machine 1 lowers an upper die 13 fixed to the slide 3 toward a lower die 14 fixed to the bolster 2, and presses the workpiece material that is transported between the upper die 13 and the lower die 14. The drive mechanism is not limited to a servo motor type, and a known mechanism can be used, for example, a mechanical press using a flywheel or a linear press using a ball screw.

1-2. Control Device The control device 20 includes a display unit 22, a calculation unit 24, a storage unit 26, and an operation unit 28. The control device 20 operates the drive mechanism of the press machine 1 according to a set press motion. The control device 20 is electrically connected to each part of the press machine 1. The press machine 1 includes a plurality of sensors, and the control device 20 receives output signals from these sensors. For example, the press machine 1 includes a multi-optical axis photoelectric safety device (hereinafter referred to as a "light curtain") in which a projector 15a including a plurality of light-emitting elements arranged in a row and a receiver 15b including a plurality of light-receiving elements corresponding to the projector 15a are formed as one unit, and when the control device 20 receives an output signal from the receiver 15b indicating that the light of the projector 15a has been blocked, the control device 20 forcibly stops the press machine 1.

The display unit 22 displays an image generated by the calculation unit 24. The display unit 22 will be described as a part of the control device 20, but is not limited thereto, and may be physically independent from the control device 20 as a display device for displaying the operating state of the press machine 1. Such a display device may be, for example, a display of a portable terminal such as a tablet computer or a smartphone, and the portable terminal may further include some functions of the control device 20, such as the calculation unit 24. In that case, both the display device and the control device 20 have a communication function for transmitting and receiving data between them. The display unit 22 may be an LCD (liquid crystal display), an OLED (organic electroluminescence display), or the like, and the display unit 22 may have a touch panel function as a part of the operation unit 28.

Figure 2 shows an example of the display unit 22, which displays at least a status display image 224 extending in a strip shape. The status display image 224 shows the operating state of the press machine 1 in a predetermined period up to the present (the period from time Te to the present time Tp in Figure 2). Here, the operating state of the press machine 1 includes a normal operating state in which press processing is repeatedly performed according to the press motion stored in the memory unit 26 and the set SPM (Shots Per Minute), and an abnormal operating state other than the normal operating state. Abnormal operating states may include not only abnormalities of the press machine 1 itself, such as an emergency stop due to a servo motor failure, but also, for example, a stop and inching operation for maintenance due to a processing defect, a production stop due to the end of the processed material, and a stop of the press machine 1 due to an operator's break.

The display unit 22 displays the time series changes in the operating state during a specified period by changing the color of the band-shaped status display image 224 in the extension direction P. The specified period can be set arbitrarily depending on various conditions such as the operating rate of the press machine 1, the frequency of die replacement, and other processing contents, and may be, for example, seven days, or one year for a press machine 1 with a low failure frequency. The status display image 224 is an image displayed on the display unit 22 according to image information calculated by the calculation unit 24, and is updated every unit time. The unit time may be set to match the cycle with the shortest update frequency among multiple evaluation values described later.

In this way, by displaying the time series changes in the operating state of the press machine 1 up to the present time through color changes in the extension direction P of the band-shaped status display image 224, the operator can easily visually determine abnormalities in the operating state of the press machine 1. For example, if the operator can sense from the color change in the status display image 224 a change such as an increase in the frequency of occurrence of an abnormal operating state over time, it is possible to perform maintenance on the press machine 1 as necessary and prevent serious breakdowns from occurring.

The operation unit 28 allows the operator to input information regarding the operation of the press machine 1, and outputs the input information to the calculation unit 24 and the memory unit 26. The functions of the operation unit 28 can be realized by hardware such as a keyboard, mouse, buttons, touch panel, and touch pad.

The memory unit 26 functions as a work area for the calculation unit 24, as well as storing programs and various data for operating the calculation unit 24, and these functions can be realized by a hard disk, RAM, etc. The memory unit 26 stores information collected from multiple sensors (including the light projector 15a and the light receiver 15b) and the servo controller, etc., related to the operating state of the press machine 1, and information related to the operating state calculated by the calculation unit 24, etc., associated with time information. The control device 20 transmits and receives various signals to and from these sensors and devices such as the servo controller.

The calculation unit 24 can be realized by various processors such as a CPU (Central Processing Unit). The calculation unit 24 executes the press working process by executing programs stored in the storage unit 26. The calculation unit 24 includes a processing unit for displaying the operating state of the press machine 1 on the display unit 22, and includes, for example, an evaluation value calculation unit 240 and a color arrangement unit 242.
Equipped with.

The evaluation value calculation unit 240 calculates, for example, two or more types of evaluation values that evaluate the operating state of the press machine 1 per unit time. The evaluation value is, for example, a value weighted according to relevance to a failure with a normal operating state as a reference value. The two or more types of evaluation values can include at least one evaluation value calculated by machine learning. By reflecting the machine learning evaluation value in the status display image 224, it is possible to gradually improve the accuracy as an indicator of the operating state.

The two or more types of evaluation values can include, for example, the degree of abnormality of the press machine 1 calculated by machine learning, the production stability of the press machine 1, and the frequency of manual operation of the press machine 1. Depending on the design concept of the machine learning, the degree of abnormality calculated by machine learning tends to calculate a larger value when the press machine 1 is stopped, and may also calculate a large value of the degree of abnormality when the press machine 1 is intentionally stopped regardless of an abnormality (such as during the operator's break). For this reason, there is concern about relying solely on the degree of abnormality calculated by machine learning as a sign of failure. By reflecting not only the degree of abnormality calculated by machine learning but also the production stability and manual operation frequency of the press machine 1 in the status display image 224 in this way, it is expected that a result that is more in line with the actual situation can be obtained, and in particular, a sudden color change in the status display image 224 can be suppressed.

The evaluation value calculation unit 240 may include, for example, a learning model generation unit, a prediction value calculation unit, an anomaly calculation unit, and an anomaly output unit disclosed in JP 2020-62650 A in order to calculate an evaluation value by machine learning.

The learning model generation unit performs machine learning using one of the data (multiple data from the multiple sensors of the press machine 1, the position deviation data, and the speed deviation data) stored in the memory unit 26 as a target variable and data other than the one data as an explanatory variable to generate a learning model for the one data, for all of the multiple data, the position deviation data, and the speed deviation data. A neural network is used as the machine learning algorithm, but other algorithms may be adopted as long as they are analysis techniques suitable for correlated data. The multiple sensors include, for example, a sensor that detects the press load, a sensor that detects the output current (secondary current) of the servo amplifier of the servo motor, a sensor that detects the temperature (IGBT temperature) of the servo amplifier, a sensor that detects the temperature of the capacitor output to the servo amplifier, a sensor that detects the voltage across the capacitor (PN voltage), a sensor that detects the temperature (IGBT temperature) of the servo power supply, a sensor that detects the input current (primary current) of the servo power supply, and a sensor that detects the ambient temperature and the temperature of the lubricating oil.

In addition, when the drive mechanism of the press machine 1 is a mechanical press using a flywheel, the multiple sensors include, for example, a sensor that detects the press load, a sensor that detects the temperature of the lubricating oil, a sensor that detects the temperature of the clutch and brake, a sensor that detects the output current (secondary current) of the motor inverter, a sensor that detects the input current (primary current) of the inverter, and a sensor that detects the ambient temperature. The learning model generation unit in the mechanical press uses one of the multiple data collected from the multiple sensors stored in the memory unit 26 as a target variable, and performs machine learning using data other than the one data as explanatory variables to generate a learning model for the one data, for all of the multiple data.

The predicted value calculation unit inputs the actual measured values of the plurality of data collected from the plurality of sensors and the position deviation data and speed deviation data collected from the servo controller to a learning model for the one data item, and calculates a predicted value for the one data item, for all of the plurality of data items, the position deviation data, and the speed deviation data, during an operation period (self-diagnosis period) excluding the learning period. The self-diagnosis period is set to a short period in order to grasp the current operating state, and can be, for example, about one minute, and can be set to a short period in order to grasp the current operating state.
It is set to the cycle time.

The abnormality degree calculation unit calculates the degree of abnormality based on the difference between the actual measured values of the multiple data, the position deviation data, and the speed deviation data, and their respective predicted values. The degree of abnormality can be set in accordance with the color gradation value described below. For example, if the color corresponding to the degree of abnormality has 256 gradations represented by gradation values from 0 to 255, the gradation value of the highest degree of abnormality is 255, and the larger the gradation value, the more abnormal the operating state of the press machine 1 is.

The abnormality degree output unit outputs the degree of abnormality calculated by the abnormality degree calculation unit. For example, the abnormality degree output unit causes the display unit 22 to display the calculated degree of abnormality as an abnormality degree display image 220. Information on the calculated degree of abnormality may also be transmitted to other information processing devices or servers. Furthermore, when the calculated degree of abnormality exceeds a predetermined threshold value, the abnormality degree output unit may cause the display unit 22 to display warning information (alert), or may transmit the warning information to other information processing devices or servers.

The evaluation value calculation unit 240 also calculates evaluation values other than the degree of abnormality based on evaluation items other than the evaluation items used for the degree of abnormality, for example. Evaluation values other than the degree of abnormality can be, for example, the production stability of the press machine 1 and the frequency of manual operation of the press machine 1, but other evaluation values may be used as long as the degree of abnormality can be corrected in accordance with the actual conditions of the press machine 1. The production stability of the press machine 1 and the frequency of manual operation of the press machine 1 are displayed on the display unit 22 as an operation-related information image 226. Details of the operation-related information image 226 will be described later.

The production stability of the press machine 1 is an evaluation value that indicates the stability of the press operation during a certain period going back from the present. The period is set to, for example, 24 hours. The production stability is calculated based on, for example, the time during which the press machine 1 is operating and the time during which the light curtain is blocked (the light projector 15a is not received by the light receiver 15b) during the period. The time during which the press machine 1 is operating can be measured, for example, by an output signal from an encoder of a servo motor. In addition, the number of productions per unit time may be set as a reference production number, and the production stability may be calculated based on the achievement rate relative to the reference production number. A large calculated value of the production stability means that the operation state is stably executed during the period or unit time. The production stability can be set corresponding to the gradation value of a color, which will be described later. Specifically, when the color corresponding to the production stability is 256 gradations represented by gradation values of 0 to 255, the gradation value corresponding to the highest production stability is 255, and the larger the gradation value, the more stable the press operation is. More specifically, as an example of calculation based on the time the light curtain is shaded, if the predetermined period is 60 minutes (3,600 seconds) and the shaded time is 13 minutes (780 seconds), the color gradation value is set to 200, based on (1-780/3,600) x 255 = 199.75. As an example of calculation based on the achievement rate with respect to the standard production volume per unit time, the standard production volume is calculated (unit time converted into minutes x SPM) from the required production volume and SPM input in advance by the worker, and if the achievement rate in actual operation is 80%, the gradation value is set to 204, based on 255 x 80/100 = 204. However, the calculation method is not limited to these.

The manual operation frequency of the press machine 1 is calculated based on the time of automatic operation and the time of manual operation in a period going back a certain amount of time from the present. The time of automatic operation can be measured by the time the calculation unit 24 is processing according to the slide motion, and the time of manual operation can be measured by the operation time of the operation unit 28. This period is set to, for example, 24 hours. Alternatively, the time when the operation selection switch is selected for production, such as "Safety One (Safety One Process)" and "Continuous (Continuous Operation)", is considered to be automatic operation, and the time when the operation selection switch is selected for production, such as "Off" and "Inching (Inching Operation)", is considered to be manual operation, and the ratio of these times may be used as the manual operation frequency. However, if a specified number of stops (pr
In order to distinguish from the case where the press machine 1 stops for a time other than the set stop and manual operation is performed to remove the die from the press machine 1, the time of a specified manual operation that is not considered to be an abnormality of the press machine 1 itself can be excluded from the calculation of the manual operation frequency. For example, even if it is a manual operation, the time of operation after a specified number of stops and accompanied by operation of a die clamp or a die lifter can be judged as the time for performing a pre-planned die exchange, and the calculation can be performed by excluding it so as not to affect the manual operation frequency. Here, "prescribed number of stops" means stopping the press machine 1 at a preset number of strokes (production number). A small value of the manual operation frequency means that there is little manual operation in the period, and that automatic operation is performed for a long time and the operating state is stable. Automatic operation can be called continuous operation, and manual operation can be called inching operation. The operation frequency can be set corresponding to the color gradation value described later. Specifically, when the color corresponding to the operation frequency is expressed as 256 gradations represented by gradation values from 0 to 255, the gradation value corresponding to the lowest operation frequency is 255, and the larger the gradation value, the more stable the press operation is, which is an index for judging the stability of the press operation. A specific method for calculating the manual operation frequency is, for example, the same method as that for the production stability described above, but is not limited thereto.

The coloring unit 242 combines two or more colors corresponding to two or more evaluation values that evaluate the operating state of the press machine 1 per unit time. By using two or more evaluation values, it is possible to suppress abrupt changes in the evaluation value. The colors are colors that can be displayed by the display unit 22, and include chromatic and achromatic colors. However, it is preferable to select from chromatic colors from the viewpoint of distinguishability, and it is preferable to select colors that are angularly separated from each other on the color wheel. Combining two or more colors is what is called color mixing, and additive mixing can be used, for example. Two or more colors are set to gradation values corresponding to the magnitude of each evaluation value. By combining two or more colors set to gradation values corresponding to the magnitude of the evaluation value, it is possible to express the change in the operating state over time with a gradation of at least two colors, so that the operator can recognize the trend of the current operating state, for example, a sign that a failure is approaching.

The two or more types of evaluation values can be, for example, three types: the degree of abnormality of the press machine 1, the production stability of the press machine 1, and the manual operation frequency of the press machine 1, and the two or more colors can be three colors: red, green, and blue. By using these three primary colors, the color arrangement unit 242 can combine colors using RGB, which is widely used in color displays as a type of additive mixing. Therefore, by using the three colors of red, green, and blue, which are the three primary colors of light corresponding to the three types of evaluation values, the processing in the color arrangement unit 242 is simplified and the processing load is reduced.

When the two or more colors are the three colors red, green, and blue, the larger the gradation value of the red [R], the greater the abnormality value indicating that the operating state of the press machine 1 is abnormal; the larger the gradation value of the green [G], the greater the production stability value indicating that the operating state is stable; and the larger the gradation value of the blue [B], the greater the manual operation frequency value indicating that the operating state is stable. In this way, even when the abnormality value is high and the gradation value of the red [R] is high, the appropriate color according to the actual operating state can be displayed on the display unit by combining the gradation values of green [G] and blue [B], which indicate that the operating state is stable.

In the color arrangement section 242, a specific example of a color that is a combination of 256 gradations represented by gradation values of 0 to 255 using the three primary colors of light is as follows: when operation is most stable, the color becomes light blue with [R, G, B] = [0, 255, 255]. Here, even if the value of red [R] indicates an abnormal state and the gradation value approaches 255, if there is no significant change in green [G] and blue [B] and the gradation value remains close to 255, the color obtained by the combination becomes a color close to low saturation white. Therefore, the operator does not get the impression that something is wrong. Also, when operation is most unstable, the color becomes red with [R, G, B] = [255, 0, 0]. Even if the value of green [G] indicates a state of low production stability and the value of blue [B] indicates a state of high manual operation frequency, and both gradation values remain close to 0, the value of red [R] indicates a normal state, and if the gradation value approaches 0, the color becomes a color close to low brightness black. Therefore, the operator does not get the impression that something is wrong. In this way, the information on the main cause of an abnormal driving condition (red [R]) and the two secondary causes (green [G] and blue [B]) indicating a stable driving condition act as filters for each other, and as the three RGB values increase and decrease in the same tendency (abnormal or stable), appropriate saturation and brightness are achieved, making the hue clearly discernible, making it easier for the operator to judge the driving condition.

An example of the status display image 224, the abnormality degree display image 220, and the operation-related information image 226 will be described using FIG. 2. The display unit 22 can display the status display image 224, the operation-related information image 226 of the press machine 1, and the abnormality degree display image 220 that displays the abnormality degree of the press machine 1. By displaying the status display image 224, the operation-related information image 226, and the abnormality degree display image 220 on the display unit 22, the operator can easily grasp the relevance of the information obtained from each image. All images are displayed with the time axis of the same scale as the horizontal axis, and the three images are displayed side by side with a vertical gap between them.

The status display image 224 is displayed on the display unit 22 in colors combined by the coloring unit 242. The status display image 224 is displayed in a black and white gradation, but since RGB is used, it is actually displayed by combining three colors, red, green, and blue, in 256 gradations. In FIG. 2, the parts displayed in colors close to blue are periods close to a normal operating state in which the press operation is relatively stable, the parts displayed in colors close to green are periods that are more unstable than the normal operating state, and the parts displayed in colors close to orange or red are periods in which an abnormality is occurring or a malfunction has already occurred. Warm colors such as orange and red are indications that foresee a malfunction of the press machine 1, and are also effective as colors that call the operator's attention. The coloring of the evaluation value is not limited to RGB values, but may be values that can be quantified by a computer, such as a color code expressed in hexadecimal, or may be expressed in shades of black and white using a grayscale or the like.

The status display image 224 can display the colors combined in the color combination section 242 for each unit time in the portion that represents the current (time Tp) driving status. By updating the driving status for each unit time and displaying the current (time Tp) driving status, the operator can grasp the latest driving status. In addition, by combining colors in the color combination section 242, it is possible to make it easier for the operator to recognize the time series changes in the driving status up to the present (time Tp) by using two or more colors and changes in gradation values.

The status display image 224 is a strip-shaped image that has a predetermined height and extends linearly in the horizontal direction. The status display image 224 can display the current (time Tp) operating state at either end in the extension direction P, and can display the operating state corresponding to the elapsed time (time Tp to time Te) from the end that displays the current operating status to the other end. In the example of FIG. 2, the status display image 224 is blue at time Te, but as time Tp approaches, the color gradually changes to green, orange, and red. In other words, an abnormal operating state is currently continuing (time Tp), and a breakdown of the press machine 1 is expected. By displaying the operating state corresponding to the elapsed time along the longitudinal direction of the status display image 224 in this way, the operator can easily grasp the time-series change in the operating state.

The abnormality degree display image 220 is a line graph with the vertical axis representing the abnormality degree calculated by the evaluation value calculation unit 240 and the horizontal axis representing time. The abnormality degree display image 220 is updated every unit time, similar to the status display image 224.

In the driving-related information image 226, a plurality of items (eg, A to C) are arranged vertically, and the state of each item corresponding to the elapsed time is displayed horizontally.

Operation selection A in the operation-related information image 226 displays the period during which automatic operation of the press machine 1 was selected and the period during which manual operation was selected. The black areas are the periods during which automatic operation was selected, and the gray areas are the periods during which manual operation was selected. For example, the evaluation value calculation unit 240 calculates the manual operation frequency based on the information of operation selection A.

Light safety interruption B in the operation-related information image 226 indicates the period during which the light from the light curtain of the press machine 1 was interrupted. The gray area is the period during which the receiver 15b was unable to receive light.

The press operation C in the operation-related information image 226 displays the period when the press machine 1 is operating and the period when it is stopped. The gray areas are the periods when it is operating, and the white areas are the periods when it is stopped. The light safety shading B information is related to the operation of the operator putting his or her hand into the die for maintenance, and the press operation C information is related to the operator's rest period, or a state when operation is stopped due to a malfunction or maintenance. Therefore, for example, the evaluation value calculation unit 240 calculates the production stability of the press machine 1 based on the light safety shading B and press operation C information. The items in the operation-related information image 226 are not limited to the above A to C, but may include factors that are used to calculate the production stability, such as the opening and closing times of the guard, the time of an emergency stop, and the ON/OFF times of the die clamp and die lifter, as appropriate.

In the example of FIG. 2, it can be seen that the degree of abnormality (abnormality display image 220) has a large influence on the stoppage of the press machine 1, but in reality, there is often no relationship between the stoppage and the abnormality. For example, if no manual operation is performed during the stoppage and the light curtain is not in operation, maintenance is not performed and there may be no relationship to a malfunction. In this way, by calculating multiple evaluation values using not only the degree of abnormality but also other information related to malfunctions, and combining multiple colors obtained from these evaluation values and displaying them in the status display image 224, the change in color over time is combined with the state and operating state of the press machine 1, resulting in a display that is more in line with the actual situation, making it easier for the operator to grasp the change in the operating state over time.

Figure 3 is an enlarged view of a portion of the status display image 224. The status display image 224 is composed of unit images 225, the number of which is calculated by dividing a predetermined period (60 minutes in the example of Figure 3) by a unit time (30 seconds in the example of Figure 3), lined up in succession in the extension direction P. In the example of Figure 3, 120 unit images 225 are linearly connected in the extension direction P, although the intermediate portion is omitted. The unit time is the time during which the status display image 224 is updated. The unit image 225 is a rectangle having a length Wx in the extension direction P and a width Wz (equal to the width of the strip-shaped status display image 224) perpendicular to the extension direction P. Each unit image 225 is displayed in a color that is combined by the color arrangement unit 242 for each unit time 225. In this way, by arranging unit images 225 having a width Wz of the belt-shaped status display image 224 and a length Wx corresponding to the unit time in a row, the operating state from the start time Te of the specified period to the current time Tp can be displayed as a time-series change in color for each unit time, making it easy for the operator to understand the color change. Also, in FIG. 3, the unit time is set to 30 seconds, but this is not limited to this. If the unit time is set to a short time, a gradual color change can be expressed, and if the unit time is set to a long time, the processing load of the control device 20 can be reduced.

The status display image 224 shown in Figures 2 and 3 is a straight line extending horizontally, but is not limited to this and may be a circular ring, an arc, a straight line extending vertically, etc. Each of Figures 4 to 6 is a diagram showing an example of another form of the status display image 224. Note that although the units are "Hour" and "Minute" in Figures 4 to 6, the operator can set them appropriately according to the production status, etc. For example, the unit may be "Day", in which case the specified period can be set to one week, one month, several months, one year, etc.

The status display image 224 in FIG. 4 has a band-like shape that extends in a circular ring shape. In the example in FIG. 4, the time Tp and the time Te are placed near the vertices of the ring, and both ends of the status display image 224 are placed facing each other with a small gap between them. This gap makes it easy for the operator to grasp the start time Te of a specified period and the current time Tp, even though the status display image 224 is in a circular ring shape.

The status display image 224 in FIG. 5 has the shape of a band extending in an arc. In the example of FIG. 5, when the time Tp (60 minutes) is set to an angle of 0 degrees, it extends upward in an arc, reaches a vertex angle of 90 degrees at the midpoint (30 minutes), and reaches time Te (0 minutes) at an angle of 180 degrees. The arc is not limited to the range from 0 degrees to 180 degrees, and may be greater than 180 degrees or less than 180 degrees.

The status display image 224 in FIG. 6 has a strip shape that extends linearly in the vertical direction. In the example of FIG. 6, the status display image 224 is a rectangle that extends with a width Wz from time Tp at the bottom to time Te at the top.

2. Method for displaying an operation state of a press machine The method for displaying an operation state of the press machine 1 will be described below with reference to Fig. 7. Fig. 7 is a flowchart of the method for displaying an operation state of the press machine 1 according to the present embodiment described with reference to Figs.

The method for displaying the operating status of a press machine 1 shown in FIG. 7 repeatedly executes, in this order, a step of calculating multiple evaluation values (S10), a step of determining a color corresponding to each evaluation value (S20), a step of coloring (S30), and a step of outputting to the display unit (S40) for each unit time.

S10: In the process of calculating multiple evaluation values (S10), the evaluation value calculation unit 240 calculates two or more types of evaluation values that evaluate the operating state of the press machine 1 per unit time, for example.

S20: In the step of determining the color corresponding to each evaluation value (S20), the color arrangement unit 242 determines two or more colors and gradation values corresponding to the two or more types of evaluation values.

S30: In the color-matching step (S30), the color-matching unit 242 combines the two or more colors.

S40: In the step (S40) of outputting to the display unit, the color combination unit 242 outputs the combined colors to the display unit 22, and the time series changes in the operating state of the press machine 1 that presses the workpiece material over a predetermined period up to the present are displayed on the display unit 22 as color changes in the extension direction P of the band-shaped status display image 224. By displaying the time series changes in the operating state up to the present in the step (S40) as color changes in the extension direction P of the band-shaped status display image 224, the operator can easily visually determine abnormalities in the operating state of the press machine 1.

The present invention is not limited to the above-described embodiments, and various modifications are possible, including configurations that are substantially the same as those described in the embodiments (configurations with the same functions, methods, and results, or configurations with the same purpose and effect). The present invention also includes configurations in which non-essential parts of the configurations described in the embodiments are replaced. The present invention also includes configurations that achieve the same effects as the configurations described in the embodiments, or configurations that can achieve the same purpose. The present invention also includes configurations in which publicly known technology is added to the configurations described in the embodiments.

1... Press machine, 2... Bolster, 3... Slide, 13... Upper die, 14... Lower die, 15a... Light projector, 15b... Light receiver, 20... Control device, 22... Display unit, 220... Abnormality level display image, 22
4: status display image, 225: unit image, 226: driving-related information image, 24: calculation unit, 240: evaluation value calculation unit, 242: color arrangement unit, 26: storage unit, 28: operation unit, P: extension direction, Tp, Te: time, Wx: length, Wz: width

Claims (10)

In a press machine for pressing a workpiece,
a display unit that displays a status display image extending in a band shape that indicates an operating status of the press machine for a predetermined period up to the present;
A calculation unit that calculates two or more types of evaluation values that evaluate the operating state per unit time;
a color arrangement unit that mixes two or more colors corresponding to the two or more types of evaluation values ;
Equipped with
the display unit displays a time series change in the driving state during the predetermined period by changing a color of the belt-shaped state display image in an extension direction,
The two or more colors are each selected by the color arrangement unit as chromatic colors that are angularly spaced apart on a hue circle, and are set to a gradation value according to the magnitude of each evaluation value;
The press machine, characterized in that the status display image displays the color mixed by the color scheme unit for each unit time in a portion representing the current operating status. In claim 1,
The two or more types of evaluation values are three types,
A press machine, wherein the two or more colors are three colors: red, green, and blue. In claim 1 or 2,
The press machine, wherein the two or more types of evaluation values include at least one evaluation value calculated by machine learning. In any one of claims 1 to 3,
The two or more types of evaluation values include an abnormality degree of the press machine calculated by machine learning, a production stability of the press machine, and a manual operation frequency of the press machine. In claim 4,
The two or more colors are red, green, and blue,
The greater the red gradation value, the greater the abnormality level value indicating that the operating state is abnormal;
The production stability value indicating that the operating state is more stable is assigned to the green gradation value,
A press machine, characterized in that the manual operation frequency value indicating that the operating state is more stable as the blue gradation value is larger is assigned. In any one of claims 1 to 5,
the state display image is configured by arranging unit images, the number of which is calculated by dividing the predetermined period by the unit time, continuously in the extension direction;
A press machine, characterized in that each of the unit images displays a color that is mixed by the color arrangement unit for each unit time. In any one of claims 1 to 6,
the status display image displays the current operating status at one of both ends in the extension direction, and displays the operating status corresponding to an elapsed time from the end displaying the current operating status to the other end. In any one of claims 1 to 7,
The display unit displays the status display image, an operation-related information image of the press machine, and an abnormality degree display image that displays an abnormality degree of the press machine. calculating two or more types of evaluation values for evaluating an operating state per unit time of a press machine which presses a workpiece material, mixing two or more colors corresponding to the two or more types of evaluation values, and displaying a time series change in the operating state over a predetermined period up to the present on a display unit as a change in color in an extension direction of a band-shaped status display image;
The two or more colors are selected as chromatic colors that are angularly spaced apart on a hue circle, and are set to gradation values according to the magnitude of each evaluation value;
A method for displaying an operating status of a press machine, characterized in that the status display image displays a mixed color for each unit time in a portion representing the current operating status. In claim 9,
The operation status display method of a press machine, characterized in that the display unit displays the status display image, an operation-related information image of the press machine, and an abnormality degree display image that displays an abnormality degree of the press machine.

Images