JP7024800B2 - Steel plant maintenance support equipment - Google Patents

Description

The present invention relates to a maintenance support device for a steel plant.

Patent Document 1 discloses a cause estimation support system for quality abnormalities. In the cause estimation support system, the correlation between the quality evaluation index and the candidate condition in the manufacturing process is automatically presented.

Japanese Patent No. 6116445

However, the one described in Patent Document 1 does not present information for determining the necessity of measures for maintaining quality. Therefore, maintenance work may not be performed properly.

The present invention has been made to solve the above-mentioned problems. An object of the present invention is to provide an operator with a maintenance support device for a steel plant capable of appropriately presenting information for determining the necessity of countermeasures.

The maintenance support device for a steel plant according to the present invention provides the distribution of quality accuracy within the same stratification and the quality accuracy of the target steel material when the steel material is stratified according to the range of steel type, plate thickness and plate width of the product. It is provided with a calculation unit that calculates the severity from the relationship of the above, and a display control unit that displays information on the severity calculated by the calculation unit on the display device.

According to the present invention, the maintenance support device causes the display device to display information on the severity level. Therefore, it is possible to appropriately present the information to the operator when determining the necessity of measures for maintaining the quality.

It is a schematic diagram of the steel plant to which the maintenance support device of the steel plant in Embodiment 1 is applied. It is a figure for demonstrating the example of the screen of the display apparatus controlled by the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a figure for demonstrating the product information displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the quality accuracy information displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating 3D information displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the quality chart information displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the quality chart information displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the information of the distribution of quality accuracy displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the information of the time-series change of the quality accuracy displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the information of the event displayed by the display device controlled by the maintenance support device of the steel plant in Embodiment 1. FIG. It is a figure for demonstrating the registration of the event to the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a figure for demonstrating the registration of the measure to the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a figure for demonstrating the registration of the waveform pattern in the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a figure for demonstrating the registration of each item of 3D information in the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a flowchart for demonstrating the outline of operation of the maintenance support apparatus of a steel plant in Embodiment 1. FIG. It is a hardware block diagram of the maintenance support apparatus of a steel plant in Embodiment 1. FIG.

A mode for carrying out the present invention will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are designated by the same reference numerals. The duplicate description of the relevant part will be simplified or omitted as appropriate.

Embodiment 1.
FIG. 1 is a schematic diagram of a steel plant to which the maintenance support device for the steel plant according to the first embodiment is applied.

In FIG. 1, the steel plant 1 is equipped with a plurality of facilities. Each of the plurality of facilities comprises each of the plurality of sensors.

The control system 2 transmits the command data d1 to each of the plurality of facilities. Each of the plurality of facilities operates based on the command data d1. At this time, each of the plurality of sensors collects actual data. Of the actual data, the actual data d2 is used for the control system 2.

The steel sheet 3 undergoes a process of heating, processing, cooling, and winding by a plurality of facilities. As a result, the product is manufactured.

The display device 4 is provided so as to be able to display information.

The maintenance support device 5 includes a storage unit 5a, a calculation unit 5b, and a display control unit 5c.

The storage unit 5a stores the data d3, which is a combination of the actual data d2, the intermediate calculation data in the control system 2, and the calculation result data. The storage unit 5a stores the actual data d4 among the actual data of each of the plurality of sensors.

The calculation unit 5b receives the data d5, which is a combination of the data d3 and the actual data d4, from the storage unit 5a. The calculation unit 5b performs the calculation necessary to support the maintenance of the steel plant 1 based on the data d5.

The display control unit 5c causes the display device 4 to display information necessary for maintenance of the steel plant 1 based on the calculation result of the calculation unit 5b.

The operator 6 performs maintenance on the steel plant 1 based on the information displayed on the display device 4.

For example, when there is an abnormality peculiar to each layer depending on the range of steel type, plate thickness, and plate width of the product, the operator 6 is a parameter managed for each layer in order to determine the operation of the control system 2 according to the operating conditions. Take measures after considering how to change the table.

Next, an example of the screen of the display device 4 will be described with reference to FIG.
FIG. 2 is a diagram for explaining an example of a screen of a display device controlled by a maintenance support device for a steel plant according to the first embodiment.

As shown in FIG. 2, the display device 4 displays product information, quality accuracy information, three-dimensional information, and quality chart information.

The product information is displayed on the upper left of the screen of the display device 4. The quality accuracy information is displayed at the lower left of the screen of the display device 4. The three-dimensional information is displayed on the upper right of the screen of the display device 4. The quality chart information is displayed at the lower right of the screen of the display device 4.

Next, product information will be described with reference to FIG.
FIG. 3 is a diagram for explaining product information displayed by a display device controlled by the maintenance support device of the steel plant according to the first embodiment.

As shown in FIG. 3, the product information is mainly information on the steel sheet 3 manufactured every moment. For example, a product management number is displayed as product information. For example, the indicated value is displayed as product information. For example, the control parameter control number is displayed as product information.

The product control number is a control number unique to the product. The indicated value is a target value for each index such as steel type, plate thickness, plate width, and temperature of the product. The control parameter control number is a number unique to the parameter table managed for each layer according to the range of steel type, plate thickness, and plate width of the product.

Next, the quality accuracy information will be described with reference to FIG.
FIG. 4 is a diagram for explaining the quality accuracy information displayed by the display device controlled by the maintenance support device of the steel plant in the first embodiment.

As shown in FIG. 4, the quality accuracy information is the accuracy information of each quality control item. In the area to the right of the quality accuracy information, information on statistical values within the same layer is displayed for a set of products with the same control parameter control number. For example, as the information of the statistical value in the same layer, the information of the average value of the quality accuracy in the same layer is displayed. For example, information on the number of past rolled materials in the same layer is displayed as information on statistical values in the same layer. For example, information on the severity within the same stratum is displayed as information on the statistical values within the same stratum.

If the accuracy falls below the control standard value and a quality abnormality occurs, a mark is displayed. For example, when the temperature is abnormal, the temperature display area is surrounded by a thick frame and displayed.

Next, three-dimensional information will be described with reference to FIG.
FIG. 5 is a diagram for explaining three-dimensional information displayed by the display device controlled by the maintenance support device of the steel plant in the first embodiment.

The three-dimensional information is information in which the accuracy of some quality control items and the information of the steel sheet 3 rolled from the past to the present for the other three items are plotted in three dimensions. The latest information on the steel plate 3 is displayed in an easy-to-understand manner.

For example, the three-dimensional information is plotted three-dimensionally for three items of quality accuracy, steel grade control number, and product plate thickness. For example, the latest information on the steel plate 3 is plotted in red. For example, the three-dimensional information is used to confirm the state of the latest accuracy of the steel sheet 3 while comparing it with the accuracy of the steel sheet 3 rolled in the past. For example, the three-dimensional information is also used to confirm the tendency of accuracy deterioration in any steel type and plate thickness.

Next, the quality chart information will be described with reference to FIGS. 6 and 7.
6 and 7 are diagrams for explaining the quality chart information displayed by the display device controlled by the maintenance support device of the steel plant in the first embodiment.

The quality chart information is the information of the full length chart of a plurality of quality control items. The deviation tolerance of product management is displayed according to each of the multiple full length charts. The deviation tolerance is used to check whether the quality control item exceeds the tolerance.

As shown in FIG. 7, when the calculation result of the product accuracy with respect to the full length chart is less than the reference value, a mark is displayed.

For example, if the quality control item corresponding to the full length chart in the lower left is abnormal, the chart in the lower left is displayed surrounded by a thick frame line. Further, when a waveform similar to the waveform pattern registered in the past exists, the similar waveform pattern is automatically displayed in an overlapping manner. For example, when the area surrounded by the thick frame line is specified by left-clicking or the like, the information of the past countermeasure contents associated with the waveform pattern is displayed. This content is used when considering whether the same measures are effective.

Next, the distribution of quality accuracy will be described with reference to FIG.
FIG. 8 is a diagram for explaining information on the distribution of quality accuracy displayed by the display device controlled by the maintenance support device of the steel plant in the first embodiment.

When the quality is abnormal, if the area surrounded by the thick frame line is specified by left-clicking or the like, information on the distribution of past quality accuracy within the same stratification is displayed.

As shown in FIG. 8, when the quality accuracy of the target steel plate 3 is greater than 90% and 92% or less, the bar graph corresponding to the accuracy is displayed in red. Whether or not the situation is serious is confirmed based on the relationship between the distribution of quality accuracy within the same layer and the quality accuracy of the target steel material. Specifically, the severity Ab is confirmed. For example, the severity Ab is calculated by the following method.

N is the number of rolled rolls for the same layer in the past. _qi is the quality accuracy of the steel sheet 3 in the same layer in the past. q _L is a control standard value for the accuracy of the target quality control item. q _I is the quality accuracy of the target steel sheet 3.

The number N _A in which q _i is smaller than q _L is calculated. At this time, the ratio R of the number of steel plates 3 below the control reference value q _L is calculated by the following equation (1).

_R = NA / N × 100 (%) (1)

When q _I is smaller than q _L , the severity Ab is calculated by the following equation (2).

Ab = R + C · (100-R) (2)

In (2), C is an adjustment coefficient. The adjustment coefficient C is a numerical value between 0 and 1. For example, when the value of q _L − q _I is large, the adjustment coefficient C is set to be large.

Next, the time-series change in quality accuracy will be described with reference to FIG.
FIG. 9 is a diagram for explaining information on time-series changes in quality accuracy displayed by a display device controlled by a maintenance support device for a steel plant according to the first embodiment.

When the quality is abnormal, if the area surrounded by the thick frame line is specified by right-clicking or the like, information on the time-series change in past quality accuracy within the same stratification is displayed.

As shown in FIG. 9, an event timing line and a countermeasure timing line are displayed in the information on the time-series change in quality accuracy. The event timing line is a line indicating the timing at which an event occurs. A circle is displayed at the top of the event timing line. The countermeasure timing line is a line indicating the timing at which countermeasures are taken. A triangle mark is displayed above the countermeasure timing line.

In FIG. 9, the quality accuracy deteriorates after the countermeasure timing line.

Next, the event will be described with reference to FIG.
FIG. 10 is a diagram for explaining event information displayed by a display device controlled by the maintenance support device of the steel plant according to the first embodiment.

When the circle in FIG. 9 is specified by left-clicking or the like, information indicating the content of the event is displayed. When the triangle mark is specified by left-clicking or the like, information indicating the content of the countermeasure is displayed.

For example, as shown in FIG. 10, information about the event is displayed. Specifically, the time and content of the event and the average value of quality accuracy before and after the event are displayed. The information is used when examining whether or not there is a causal relationship between the content of the countermeasure and the quality accuracy.

Next, registration of the event will be described with reference to FIG.
FIG. 11 is a diagram for explaining registration of an event in the maintenance support device of the steel plant according to the first embodiment.

As shown in FIG. 11, on the event registration screen, "date and time", "event", and "registration" are displayed.

In the "Date and time" field, information on the date and time when the event occurred is entered. Information on the content of the event is entered in the "event" field.

If "Registration" is specified with the information entered in the "Date" and "Event" fields, the event registration is completed.

For example, in an event, items that are not considered to be directly related to quality are also registered as an event. For example, equipment maintenance such as rolling mill roll replacement is also registered as an event. For example, maintenance of the control system 2 is also registered as an event.

Next, the registration of countermeasures will be described with reference to FIG.
FIG. 12 is a diagram for explaining registration of measures in the maintenance support device of the steel plant in the first embodiment.

As shown in FIG. 12, on the countermeasure registration screen, "date and time", "quality control item", "countermeasure", "waveform pattern", "key information", and "registration" are displayed.

In the "Date and time" field, information on the date and time when the countermeasure is executed is entered. Information on the target quality control item is input in the "quality control item" field. In the "Countermeasure" field, information on the content of the countermeasure is entered. In the "Waveform pattern" field, when a waveform pattern to be dealt with exists, the information of the waveform pattern is input. In the "key information" field, information that will be needed later is entered. For example, information on an operation pattern in a rough rolling mill, which is often related to the quality accuracy of plate width, is input as "key information".

If "Registration" is specified with information entered in at least the "Date and time" column, the "Quality control item" column, and the "Countermeasure" column, the registration of the countermeasure is completed.

Next, the registration of the waveform pattern will be described with reference to FIG.
FIG. 13 is a diagram for explaining the registration of the waveform pattern in the maintenance support device of the steel plant according to the first embodiment.

As shown in FIG. 13, “X”, “Y”, and “registration” are displayed on the waveform pattern registration screen.

Numerical information is input in the "X" field and the "Y" field. At this time, at the lower part of the registration screen, the waveform pattern corresponding to the numerical value input in the "X" column and the "Y" column is displayed.

If "Registration" is specified with the "X" and "Y" fields entered, the waveform pattern registration is completed.

Next, the registration of each item of the three-dimensional information will be described with reference to FIG.
FIG. 14 is a diagram for explaining registration of each item of three-dimensional information in the maintenance support device of the steel plant in the first embodiment.

As shown in FIG. 14, “X”, “Y”, and “Z” are displayed on the registration screen of each item of the three-dimensional information.

In the "X" column, "Y" column, and "Z" column, the steel type number, product plate thickness, product plate width, parameter management steel type classification, parameter management plate thickness classification, and parameter management plate width classification, respectively. It is selected from the accuracy of the quality item.

Next, the outline of the operation of the maintenance support device will be described with reference to FIG.
FIG. 15 is a flowchart for explaining an outline of the operation of the maintenance support device of the steel plant according to the first embodiment.

In step S1, the maintenance support device 5 causes the display device 4 to display product information, quality accuracy information, three-dimensional information, and quality chart information. After that, the maintenance support device 5 performs the operation of step S2. In step S2, the maintenance support device 5 determines whether or not the information of abnormal quality is designated by the first method in the quality accuracy information.

If the abnormal quality information is not specified by the first method in step S2, the maintenance support device 5 performs the operation of step S3. In step S3, the maintenance support device 5 determines whether or not the information of abnormal quality is designated by the second method in the quality accuracy information.

If the abnormal quality information is not specified by the second method in step S3, the maintenance support device 5 performs the operation of step S2.

When the abnormal quality information is specified by the first method in step S2, the maintenance support device 5 performs the operation of step S4. In step S4, the maintenance support device 5 causes the display device 4 to display information on the distribution of past quality accuracy within the same stratification.

When the abnormal quality information is specified by the second method in step S3, the maintenance support device 5 performs the operation of step S5. In step S5, the maintenance support device 5 causes the display device 4 to display information on time-series changes in past quality accuracy within the same stratification. After that, the maintenance support device 5 performs the operation of step S6.

In step S6, the maintenance support device 5 determines whether or not information indicating an event or the like is designated.

If the information indicating the event or the like is not specified in step S6, the maintenance support device 5 performs the operation of step S5.

When the information indicating the event or the like is specified in step S6, the maintenance support device 5 performs the operation of step S7.

In step S7, the maintenance support device 5 causes the display device 4 to display information on the content of the event.

According to the first embodiment described above, the maintenance support device 5 causes the display device 4 to display the severity information. Therefore, it is possible to appropriately present to the operator 6 the information for determining the necessity of measures for maintaining the quality.

Further, the maintenance support device 5 causes the display device 4 to display quality accuracy information before and after the event. Therefore, the influence of the event on the quality accuracy can be immediately presented to the operator 6.

For example, the maintenance support device 5 causes the display device 4 to display numerical information indicating quality accuracy before and after the event. Therefore, the influence of the event on the quality accuracy can be quantitatively and immediately presented to the operator 6.

For example, the maintenance support device 5 causes the display device 4 to display information on time-series changes in quality accuracy before and after the event, including the timing of the event. Therefore, the influence of the event on the quality accuracy can be qualitatively and immediately presented to the operator 6.

Further, when the event is designated, the maintenance support device 5 causes the display device 4 to display information indicating the content of the event. Therefore, it is possible to present the details of the event that affects the quality accuracy to the operator 6.

Further, the maintenance support device 5 displays information on a plurality of quality charts on the display device 4, and when there is a quality below the reference value, the maintenance support device 5 adds mark information to the information on the chart of the quality. Display on the display device 4. Therefore, it is possible to immediately present the quality with abnormal accuracy to the operator 6.

Further, when the waveform pattern similar to the quality is registered, the maintenance support device 5 superimposes the information of the waveform pattern on the information of the chart of the quality and displays it on the display device 4. Therefore, it is possible to immediately present to the operator 6 that a similar abnormality has occurred in the past.

Further, the maintenance support device 5 causes the display device 4 to display information on the contents of measures for the waveform pattern. Therefore, it is possible to present the appropriate countermeasure contents to the operator 6 in detail.

In this way, the maintenance support device 5 supports a series of operations for removing the abnormality by immediately grasping the occurrence of the quality abnormality and taking countermeasures. In addition, a series of work and techniques including complicated contents that require a lot of experience can be easily transmitted to the successor.

Next, an example of the maintenance support device 5 will be described with reference to FIG.
FIG. 16 is a hardware configuration diagram of the maintenance support device for the steel plant according to the first embodiment.

Each function of the maintenance support device 5 can be realized by a processing circuit. For example, the processing circuit comprises at least one processor 7a and at least one memory 7b. For example, the processing circuit comprises at least one dedicated hardware 8.

When the processing circuit includes at least one processor 7a and at least one memory 7b, each function of the maintenance support device 5 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in at least one memory 7b. At least one processor 7a realizes each function of the maintenance support device 5 by reading and executing a program stored in at least one memory 7b. At least one processor 7a is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP. For example, at least one memory 7b is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

If the processing circuit comprises at least one dedicated hardware 8, the processing circuit may be implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. To. For example, each function of the maintenance support device 5 is realized by a processing circuit. For example, each function of the maintenance support device 5 is collectively realized by a processing circuit.

For each function of the maintenance support device 5, a part may be realized by the dedicated hardware 8 and the other part may be realized by software or firmware. For example, the function of the display control unit 5c is realized by a processing circuit as dedicated hardware 8, and the function other than the function of the display control unit 5c is a program in which at least one processor 7a is stored in at least one memory 7b. It may be realized by reading and executing.

In this way, the processing circuit realizes each function of the maintenance support device 5 by hardware 8, software, firmware, or a combination thereof.

As described above, the maintenance support device for the steel plant according to the present invention can be used in a system that appropriately presents information to the operator when determining the necessity of countermeasures.

1 Steel plant, 2 Control system, 3 Steel plate, 4 Display device, 5 Maintenance support device, 5a Storage unit, 5b Calculation unit, 5c Display control unit, 6 Operator, 7a processor, 7b memory, 8 Hardware

Claims (5)

When the steel material is stratified according to the range of steel type, plate thickness and plate width of the product, the calculation unit that calculates the severity from the relationship between the distribution of quality accuracy within the same layer and the quality accuracy of the target steel material,
A display control unit that displays information on the severity calculated by the calculation unit on the display device,
Equipped with
The display control unit
Information on charts of multiple qualities is displayed on the display device, and when there is a quality below the reference value, the quality is irrespective of whether or not a waveform pattern similar to the quality is registered. Mark information is added to the chart information and displayed on the display device.
When a waveform pattern similar to the quality is registered, the information of the waveform pattern is superimposed on the information of the chart of the quality and displayed on the display device.
When the waveform pattern is specified, information on the content of countermeasures for the waveform pattern is displayed on the display device.
A maintenance support device for steel plants. The maintenance support device for a steel plant according to claim 1, wherein the display control unit displays quality accuracy information before and after the event on the display device. The maintenance support device for a steel plant according to claim 2, wherein the display control unit displays numerical information indicating the quality accuracy before and after the event as information on the quality accuracy before and after the event on the display device. The steel plant according to claim 2, wherein the display control unit displays on the display device information on time-series changes indicating the quality accuracy before and after the event, including the timing of the event, as the quality accuracy information before and after the event. Maintenance support device. The maintenance support device for a steel plant according to any one of claims 2 to 4, wherein the display control unit displays information indicating the content of the event on the display device when the event is designated.

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