TWI814254B - Data collection device - Google Patents

Abstract

A data collection device according to one aspect includes a first data acquisition unit configured to acquire rolling actual data of a material rolled in a previous step at each of a plurality of positions different in a rolling direction, a second data acquisition unit configured to acquire rolling actual data of the material rolled in a subsequent step at each of a plurality of positions different in a rolling direction, a position alignment unit configured to align each of the plurality of positions of the material rolled in the previous step different in the rolling direction with each of the plurality of positions of the material rolled in the subsequent step different in the rolling direction, in association with each other, based on the rolling actual data acquired by the first data acquisition unit and the rolling actual data acquired by the second acquisition unit, a generation unit configured to generate the rolling actual data for each identical point on the material with respect to each of the plurality of positions of the material different in the rolling direction, which are aligned by the position alignment unit, and a memory unit configured to store the rolling actual data for each identical point on the material.

Description

data collection device

The invention relates to a data collection device.

For example, in the steel process of rolling steel, a rolling system is used that includes a hot rolling and rolling production line and a cold rolling and rolling production line, and rolls raw materials (rolled materials) through multiple production lines or steps.

In the past, in this kind of rolling system, quality problems were not discovered until the steel coil reached the final product production line. At this time, if the main cause of the quality problem is in the upstream step, the data of each calendering step will be collected, and then the various calendering information will be retrospectively confirmed starting from the final product production line to identify the problem area. Therefore, it takes time to investigate the main cause of quality problems.

In addition, since the length of the rolled material will change according to each rolling step, the actual rolling result data of each rolling step is used to manually align the positions of the steel coil lengths in each rolling step, so the identification of problem parts is more accurate. Also lower.

In addition, because most of them lack data management in the upstream step, or do not correctly grasp the cutting length of the rolled material, the data in the downstream step and the data in the upstream step are not aligned correctly, so there may be misidentification of the main cause location.

For example, in iron and non-iron plants, when it is necessary to confirm the quality problem of the final product, in order to investigate where the main cause of the problem is in the final product production line and the upstream step production line, it is necessary to trace back from the final product production line. , collect and parse the data managed at each step.

In addition, Patent Document 1 discloses a technology regarding an abnormality prediction method and device targeting a steel manufacturing process, particularly an annealing process in which a strip-shaped steel plate is continuously heat-treated. Furthermore, Patent Document 1 shows a method that determines whether the desired manufacturing process (annealing) is good or not, and predicts and prevents quality abnormalities based on the premise of memorizing operation and control data at each position along the longitudinal direction of the steel plate.

In addition, Patent Document 2 discloses a support system that supports an operator's estimation operation for estimating a product to be manufactured in a manufacturing line composed of a plurality of steps including a quality inspection step in a steel manufacturing process. The reason for abnormal quality. Furthermore, Patent Document 2 shows a method for inferring a cause by checking data on a plurality of processes and an operator support method for judgment.

In addition, Patent Document 3 discloses a tracking method of feedforward control, which is a technology for synchronizing the position of the steel material between a plurality of steps in the manufacturing process of the steel material. Generally, when feedforward control is performed, equipment for detecting the position of the steel material is provided in order to combine and memorize the control input data and position information in the previous step. If special equipment is not available, the material must be restrained between the two steps during simultaneous calendering.

[Advanced technical documents]

[Patent Document]

Patent Document 1: Japanese Patent No. 4992046

Patent Document 2: Japanese Patent No. 6116445

Patent Document 3: Japanese Patent No. 4400253

However, in the past, it was not easy to accurately obtain the same point on the material during multiple calendaring steps. The present invention was made to solve the above-mentioned problems, and its object is to provide a method that can easily collect the actual rolling results of each common point of the material in each rolling step even when the material is rolled in a plurality of rolling steps. Data collection device for data.

A data collection device according to one aspect of the present invention collects data on actual rolling results from a calendering system that calenders materials through a front-stage step and a back-stage step. The data collection device has a first data acquisition unit that obtains data from the previous step. Calendering result data for each of the plurality of different positions in the rolling direction of the material after rolling in the previous step; the first memory unit stores the rolling result data obtained by the first data acquisition unit; the second data acquisition unit , is to obtain the rolling result data of a plurality of different positions in the rolling direction of the material after rolling in the subsequent step; the second memory part is to store the rolling result data obtained by the aforementioned second data acquisition part; The position alignment unit makes the rolling directions of the materials rolled by the previous steps different based on the rolling result data obtained by the first data obtaining unit and the rolling result data obtained by the second data obtaining unit. Each of the plurality of positions is aligned with each other in correspondence with the plurality of positions that are different in the rolling direction of the material after rolling in the subsequent step; the generating unit is for the material aligned by the aforementioned position aligning unit Calendering direction At each of the plurality of different positions, the rolling result data stored in the first storage unit and the rolling result data stored in the second storage unit are corresponding to each other to generate the rolling results for each similar point of the material. data; and a third memory unit that stores the actual rolling result data of each identical point of the material generated by the aforementioned generating unit.

In addition, the data collection device according to one aspect of the present invention preferably further includes: a shearing data acquisition unit that acquires shears showing the lengths of the front and rear ends in the rolling direction of the material rolled in the previous step. and the calculation unit calculates the actual inlet side length of the material relative to the subsequent steps based on the shearing data obtained by the aforementioned shearing data obtaining unit and the actual rolling result data obtained by the aforementioned first data obtaining unit; wherein , the aforementioned positioning unit is based on the actual inlet side length of the material relative to the subsequent step calculated by the aforementioned calculation unit and the actual rolling result data obtained by the aforementioned second data acquisition unit, so that the material after being rolled by the preceding step is The plurality of positions that are different in the rolling direction correspond to the plurality of positions that are different in the rolling direction of the material rolled by the subsequent step and are aligned with each other.

Furthermore, the data collection device according to one aspect of the present invention is preferably such that the shearing data acquisition unit detects the length of the material after being sheared in the rolling direction and the weight of the material before and after the shearing. Difference operations are performed to obtain the aforementioned clipping data.

Furthermore, in the data collection device according to one aspect of the present invention, it is preferable that the position alignment unit is based on the characteristic points included in the actual rolling result data obtained by the first data acquisition unit and the data obtained by the second data acquisition unit. The characteristic points included in the obtained rolling result data are that each of the plurality of positions in the rolling direction of the material after rolling in the previous step is different from the rolling direction of the material after rolling in the later step. The plural positions of each correspond to each other and are aligned.

According to the present invention, even when a material is rolled through a plurality of rolling steps, it is possible to easily collect rolling result data for each similar point of the material in each rolling step.

1: Calendering system

2: Hot rolling and rolling production line

3: Cold rolling and rolling production line

4: Data collection device

10:Control network

20:Heating furnace

21: Rough calender

22:Plate end cutting machine

23:Finish rolling calender

24: Cooling device

25: Coiler

26-1,26-2,26-3,26-4: Sensor

27: Front step control device

30:Unwinding machine

31: Entrance side shearing machine

32: Welding machine

33: Tension maintainer

34:Calender

35: Exit side shearing machine

36: Tension coiler

37: Sensor

38: Exit side sensor

39: Post-step control device

41:First storage department

42:Second storage department

43:Third storage department

410: First data acquisition department

412:First Memory Department

414:First Information Extraction Department

420: Second data acquisition department

422:Second Memory Department

424: Second information extraction department

430:Cut data acquisition part

431: Calculation Department

432:Position Alignment Department

433:Generation Department

434:Third Memory Department

FIG. 1 is a diagram showing a structural example of a rolling system equipped with a data collection device according to an embodiment.

FIG. 2 is a functional block diagram illustrating functions of a data collection device according to an embodiment.

FIG. 3 is a diagram illustrating data stored in the first memory unit and the second memory unit.

FIG. 4(a) is a graph showing the relationship between the position of the exit side of the previous step in the rolling direction and the thickness of the rolled material. FIG. 4(b) is a graph showing the relationship between the position of the exit side of the subsequent step in the rolling direction and the plate thickness of the rolled material. FIG. 4(c) is a graph showing the relationship between the position in the rolling direction after alignment and the plate thickness in the previous step and the plate thickness in the later step.

FIG. 5 is a diagram illustrating actual rolling result data for each common point of the rolled material stored in the third memory unit.

Figure 6 is a diagram schematically showing the position alignment in the rolling direction within the same production line.

Hereinafter, an implementation form of the calendering system will be described using drawings. FIG. 1 is a diagram showing a structural example of a rolling system 1 equipped with a data collection device according to an embodiment. As shown in Figure 1, the rolling system 1 is composed of, for example, a hot rolling rolling production line 2 and a cold rolling rolling production line 3 connected to a data collection device 4 through a control network 10, and sequentially through a plurality of rolling steps. Rolled materials (rolled materials).

The control network 10 is, for example, a network such as a LAN (Local Area Network), and may be configured to include a control LAN and an information system LAN.

The hot rolling production line 2 includes, for example, a heating furnace (RF: Reheating Furnace) 20, a roughing mill (RM: Roughing mill) 21, a plate end shear (CS: Crop Shear) 22, and a finishing mill (FM: Finishing Mills) 23, cooling device (ROT: Run Out Table) 24, and coiler (DC: Down Coiler) 25. Moreover, the hot-rolling and rolling line 2 is equipped with, for example, sensors 26-1 to 26-4, and is configured to control each component constituting the hot-rolling and rolling line 2 by the front-stage step control device 27.

The hot rolling production line 2 uses a rough rolling machine 21 to roughly roll the slab output from the heating furnace 20 , and sends the rolled material cut by the plate end shearing machine 22 to the finishing rolling machine 23 . Next, in the hot rolling and rolling production line 2, the rough rolled rolled material is further rolled to a predetermined specification by the finishing rolling mill 23, and is cooled by the cooling device 24 and then coiled by the coiler 25. Here, the rolling step performed in the hot rolling and rolling line 2 is referred to as the previous step.

The sensor 26 - 1 is disposed on the outlet side of the rough calender 21 to detect the rolling result data of the material rolled by the rough calender 21 and output it to the front step control device 27 . For example, the sensor 26-1 detects each actual result value in the rolling step, so that the previous step control device 27 can obtain the rolling results in each of a plurality of different positions in the rolling direction (the traveling direction of the rolled material). The length, thickness, width and temperature of the material.

The sensor 26 - 2 is disposed at the entrance side of the finishing rolling mill 23 , detects the rolling result data of the material sent to the finishing rolling mill 23 , and outputs it to the previous step control device 27 . For example, the sensor 26-2 detects each actual result value for the material, so that the previous step control device 27 can obtain the length, thickness, width and length of the rolled material at a plurality of different positions in the rolling direction. Temperature etc.

The sensor 26 - 3 is disposed on the exit side of the finishing rolling mill 23 to detect the rolling result data of the material rolled by the finishing rolling mill 23 and output it to the previous step control device 27 . For example, the sensor 26-3 detects each actual result value in the rolling step, so that the previous step control device 27 can obtain the length, thickness, and width of the rolled material at a plurality of different positions in the rolling direction. and temperature, etc.

The sensor 26 - 4 is arranged on the outlet side of the cooling device 24 to detect the rolling result data of the material cooled by the cooling device 24 and output it to the previous step control device 27 . For example, the sensor 26-4 detects each actual result value after the cooling step, so that the previous step control device 27 can obtain the length, thickness, and width of the rolled material at a plurality of different positions in the rolling direction. and temperature, etc.

Furthermore, the previous step control device 27 transmits the actual rolling result data detected by the sensors 26-1 to 26-4 to the data collection device 4 via the control network 10.

The cold rolling production line 3 includes, for example, an uncoiler 30, an entrance side shearer 31, a welding machine 32, a tension maintainer (looper) 33, a calender 34, an outlet side shearer 35, a tension coiler 36, and a plurality of The sensor 37 , the outlet side sensor 38 and the subsequent step control device 39 . Furthermore, the cold rolling and rolling line 3 is configured such that the subsequent step control device 39 controls each unit constituting the cold rolling and rolling line 3 .

The cold rolling and rolling production line 3 uses the tail end of the steel coil of the rolled material coiled by the coiler 25 of the hot rolling and rolling production line 2 as the front end to re-roll the rolled material rolled by the hot rolling and rolling production line 2 . Here, the rolling step performed in the cold rolling line 3 is set as a subsequent step.

More specifically, the steel coil uncoiler 30 uses the tail end of the steel coil coiled by the coiler 25 as the front end to send the rolled material to the entrance side shearer 31. Entrance side shearing machine 31 and exit side shearing machine 35 indicates that in order to organize the front and rear ends of the rolled material, the rolled material is clamped by front and rear pinch rollers (not shown) to pass through, and the rolled material is cut according to the control of the subsequent step control device 39 .

The welding machine 32 has a function of connecting steel coils and steel coils by welding, and can continuously perform the rolling steps for a plurality of steel coils. The tension maintainer 33 holds the rolled material and supplies the rolled material to the calender 34 in a fixed manner.

The calender 34 series rolls the rolled material again. The tension coiler 36 coils the rolled material rolled by the calender 34 .

A plurality of sensors 37 are arranged around a plurality of stands provided in the calender 34 to detect, for example, the thickness of the rolled material and output the result to the subsequent step control device 39 . In addition, the sensor 37 detects each actual result value in the rolling step, so that the subsequent step control device 39 can obtain the length, width, temperature, etc. of the rolled material at each of a plurality of positions different in the rolling direction. .

Furthermore, the subsequent step control device 39 transmits the rolling result data detected by each sensor 37 and the exit-side sensor 38 to the data collection device 4 via the control network 10 .

In this way, the rolling system 1 rolls the rolled material through each of the hot rolling and rolling production lines 2 (pre-stage steps) and cold rolling and rolling production lines 3 (post-stage steps), and the data collection device 4 collects the actual rolling results in each rolling step. material.

Next, the functions of the data collection device 4 will be described in detail. FIG. 2 is a functional block diagram illustrating the functions of the data collection device 4 according to an embodiment. The data collection device 4 is, for example, a computer, and the data collection device 4 has: a first storage unit 41 that stores the actual rolling result data of the previous step in a database; and a second storage unit 41 that stores the actual rolling result data of the subsequent step in a database. The storage part 42; and the third storage part 43 that will store the same point data of the rolled material in the previous step and the subsequent step in the form of a database.

The first storage unit 41 includes a first data acquisition unit 410, a first storage unit 412, and a first information extraction unit 414.

The first data acquisition unit 410 acquires, through the control network 10, the actual rolling result data of a plurality of different positions in the rolling direction of the rolled material rolled in the previous step according to the control of the first information extraction unit 414. And output to the first storage unit 412 and the calculation unit 431.

For example, the first data acquisition unit 410 may acquire the actual rolling result data detected by the hot rolling and rolling production line 2 for one steel coil when the coiler 25 of the hot rolling and rolling production line 2 completes coiling of the steel coil.

The first storage unit 412 stores the rolling result data obtained by the first data acquisition unit 410 under the control of the first information extraction unit 414 and forms a database. Furthermore, the first storage unit 412 outputs the stored rolling result data to the generation unit 433 by access from the generation unit 433.

For example, as shown in FIG. 3 , the first memory unit 412 associates and memorizes the length information, plate width, plate thickness, temperature during rolling, etc. with the steel coil of the rolled product.

The second storage unit 42 includes a second data acquisition unit 420, a second storage unit 422, and a second information extraction unit 424.

The second data acquisition unit 420 acquires, through the control network 10, the actual rolling result data of a plurality of positions different in the rolling direction of the rolled material rolled in the subsequent steps, based on the control of the second information extraction unit 424. And output to the second storage unit 422 and the position alignment unit 432 .

For example, the second data acquisition unit 420 may also acquire the actual rolling result data detected by the cold rolling and rolling production line 3 for one steel coil when the tension coiler 36 of the cold rolling and rolling production line 3 completes coiling of the steel coil. .

The second storage unit 422 stores the rolling result data obtained by the second data acquisition unit 420 under the control of the second information extraction unit 424, and constitutes a database. Furthermore, the second storage unit 422 outputs the stored rolling result data to the generation unit 433 by access from the generation unit 433.

For example, like the example shown in FIG. 3 , the second memory unit 422 associates and memorizes the length information, plate width, plate thickness, temperature during rolling, etc. with the steel coil of the rolled product.

The third storage unit 43 includes a clipping data acquisition unit 430, a calculation unit 431, a position alignment unit 432, a generation unit 433, and a third storage unit 434.

The shearing data acquisition unit 430 acquires shearing data showing the lengths of the front and rear ends in the rolling direction of the rolled material rolled in the previous step through the control network 10 and outputs the data to the calculation unit 431 .

For example, the shearing data acquisition unit 430 may also use the length of the rolled material after shearing in the rolling direction detected by the hot rolling and rolling production line 2 and the cold rolling and rolling production line 3 and the weight difference of the rolled material before and after shearing. operation to obtain clipped data.

Furthermore, the shearing data acquisition unit 430 may be configured to use the weight of the steel coil after hot rolling and the weight of the steel coil after cold rolling to more accurately obtain the length of the rolled material after shearing. Calculate the length of the rolled material after shearing due to the decrease in weight or the increase due to plating.

At this time, the shearing data acquisition unit 430 may be configured to use the length calculated from the weight when there is a difference between the detected length and the length calculated from the weight. In addition, the shearing data acquisition unit 430 may be configured to use the ratio of the length of the rolled material to improve the calculation accuracy.

The calculation unit 431 calculates the actual entrance side length of the rolled material relative to the subsequent step based on the shearing data acquired by the shearing data acquisition unit 430 and the actual rolling result data acquired by the first data acquisition unit 410, and aligns the length to the position. Part 432 outputs.

The positioning unit 432 performs rolling of the rolled material after rolling in the previous step based on the rolling result data acquired by the first data acquiring unit 410 and the rolling result data acquired by the second data acquiring unit 420 A process in which a plurality of positions that are different in direction correspond to each other and are aligned with a plurality of positions that are different in the rolling direction of the rolled material rolled in the subsequent step.

For example, the position alignment unit 432 is based on the characteristic points included in the rolling result data acquired by the first data acquiring unit 410 and the characteristic points included in the rolling result data acquired by the second data acquiring unit 420. A plurality of positions that are different in the rolling direction of the rolled material after rolling in the previous step are aligned with each other and a plurality of positions that are different in the rolling direction of the rolled material that is rolled in the subsequent step are aligned. processing. At this time, the positioning unit 432 aligns the positions based on the reversal of the longitudinal direction of the rolled material, the change in length due to temperature, and the like.

Moreover, when the shearing data acquisition unit 430 acquires the shearing data, the position alignment unit 432 calculates the actual inlet side length of the rolled material relative to the subsequent step calculated by the calculation unit 431 and the rolling length acquired by the second data acquisition unit 420. Actual result data is used to perform a plurality of positions that are different in the rolling direction of the rolled material after rolling in the previous step, and a plurality of positions that are different in the rolling direction of the rolled material after rolling in the subsequent step. processing that correspond to each other and are aligned.

FIG. 4 is a diagram showing a specific example before and after the positioning unit 432 aligns a plurality of positions that are different in the rolling direction of the rolled material. FIG. 4(a) is a graph showing the relationship between the position of the exit side of the previous step in the rolling direction and the thickness of the rolled material. Figure 4(b) shows the rolling method on the exit side of the later step. A graph showing the relationship between the directional position and the plate thickness of the rolled material. FIG. 4(c) is a graph showing the relationship between the position in the rolling direction after alignment and the plate thickness in the previous step and the plate thickness in the later step.

In addition, the range of the horizontal axis in Figure 4(b) is larger than the range of the horizontal axis in Figure 4(a) because the rolled material has been rolled again through subsequent steps. That is, the position aligning part 432 may reduce the range of the horizontal axis of FIG. 4(b) and align it with the range of the horizontal axis of FIG. 4(a) , or may adjust the range of the horizontal axis of FIG. 4(a) . The range is expanded so that it is aligned with the range of the horizontal axis of Figure 4(b).

For example, when extracting feature points from the waveform information of plate width or plate thickness, and the feature points deviate between the products after hot rolling and rolling and the products after cold rolling, as shown in FIG. 4, the position alignment unit 432 also The phase can be moved (slided) to align the feature points. In addition, the position alignment part 432 can also adjust the expansion and contraction ratios before and after the feature points to perform position alignment, so as to improve the accuracy.

As shown in FIG. 4 , after the position alignment unit 432 aligns a plurality of positions that are different in the rolling direction of the rolled material, the plate thickness in the previous step and the plate thickness in the subsequent step can be adjusted according to each step in the rolling direction. locations can be easily compared.

Furthermore, the position aligning unit 432 outputs, to the generating unit 433, information indicating a plurality of positions that are different in the rolling directions of the aligned rolled materials.

The generating unit 433 combines the rolling results data stored in the first storage unit 412 and the data stored in the second storage unit 422 for each of a plurality of positions having different rolling directions of the rolled materials aligned by the position aligning unit 432. The memorized rolling result data are correlated with each other to generate rolling result data for each identical point of the rolled material, and are output to the third storage unit 434 .

The third storage unit 434 stores the rolling result data of each identical point of the rolled material generated by the generating unit 433, and constitutes a database.

FIG. 5 is a diagram illustrating the actual rolling result data of each identical point of the rolled material stored in the third storage unit 434. As shown in FIG. 5 , after the position aligning unit 432 aligns a plurality of positions that are different in the rolling direction of the rolled material, the third memory unit 434 can compare the plate thickness of the previous step with the plate thickness of the subsequent step. The thickness can be easily compared at each position in the rolling direction.

In this way, even when the rolled material is rolled through a plurality of rolling steps of the rolling system 1, the data collection device 4 can still easily collect the actual rolling result data of each similar point of the rolled material in each rolling step, and can easily Quality analysis of rolled materials in each rolling step is performed. That is, even if a quality problem is found in the final steel coil, the data collection device 4 can easily identify the problematic part and easily analyze the actual rolling results of the previous and subsequent steps.

In addition, in the above embodiment, the first step is a hot rolling step and the second step is a cold rolling step. However, as shown in FIG. 6 , the data collection device 4 can also be configured as follows: the first step is a cold rolling step. For the rough rolling of the hot rolling line, the subsequent step is set to the finishing rolling of the hot rolling line, and a database is created in which the positions of the rolling directions are aligned in the same production line. At this time, the data collection device 4 uses each rolling result data detected by the sensors 26-1 to 26-4 (see FIG. 1).

In addition, the data collection device 4 also uses sensors to detect the end shear length in the hot rolling and rolling production line, and may also be equipped with the method of using the difference between the steel blank weight and the steel coil weight, and the measurement (scale) weight (estimated value) ) to perform corrections.

In addition, when the front and rear ends of the rolled material are reversed between steps such as cold rolling after hot rolling and annealing after cold rolling, it is of course possible to set the rear end of the previous step to the front end of the subsequent step. Waiting for reversal processing.

In addition, when the steel coil is divided or connected from the previous step to the later step, the data collection device 4 uses the steel coil ID that must be managed as the manufacturing process information.

In addition, each function of the data collection device 4 may be partially or entirely configured by hardware such as PLD (Programmable Logic Device) or FPGA (Field Programmable Gate Array). , or may be composed of a program executed by a processor such as a CPU.

4: Data collection device

41:First storage department

42:Second storage department

43:Third storage department

410: First data acquisition department

412:First Memory Department

414:First Information Extraction Department

420: Second data acquisition department

422:Second Memory Department

424: Second information extraction department

430:Cut data acquisition part

431: Calculation department

432:Position Alignment Department

433:Generation department

434:Third Memory Department

Claims (4)

A data collection device that collects calendaring actual result data from a calendering system that calenders materials through previous steps and subsequent steps. The data collection device has: The first data acquisition unit acquires the actual rolling result data at a plurality of different positions in the rolling direction of the material rolled in the previous step; The first memory department is to store the actual rolling result data obtained by the aforementioned first data acquisition department; The second data acquisition unit acquires rolling result data at a plurality of different positions in the rolling direction of the material rolled in the subsequent steps; The second memory department stores the actual rolling result data obtained by the aforementioned second data acquisition department; The position alignment unit makes the rolling directions of the materials rolled by the previous steps different based on the rolling result data obtained by the first data obtaining unit and the rolling result data obtained by the second data obtaining unit. Each of the plurality of positions corresponds to and is aligned with each other and the plurality of positions that are different in the rolling direction of the material after rolling in the subsequent steps; The generating unit is for each of a plurality of positions different in the rolling direction of the materials arranged by the position arranging unit, and combines the actual rolling result data stored in the first storage unit with the data stored in the second storage unit. The rolling result data correspond to each other to generate rolling result data for each identical point of the material; and The third memory unit stores the actual rolling result data of each identical point of the material generated by the aforementioned generating unit. The data collection device as described in claim 1 further has: The shearing data acquisition unit acquires shearing data showing the lengths of the front end and the tail end of the material rolled in the previous step after being cut in the rolling direction; and The calculation unit calculates the actual entrance side length of the material relative to the subsequent step based on the shearing data obtained by the shearing data acquisition unit and the actual rolling result data obtained by the first data acquisition unit; where, The positioning unit adjusts the length of the material after being rolled by the previous step based on the actual inlet side length of the material calculated by the calculation unit relative to the subsequent step and the actual rolling result data obtained by the second data acquisition unit. The plurality of positions that are different in the rolling direction correspond to the plurality of positions that are different in the rolling direction of the material rolled in the subsequent step and are aligned with each other. The data collection device as described in claim 2, wherein, The shearing data acquisition unit obtains the shearing data by calculating based on the length of the material after shearing in the rolling direction detected by the sensor and the weight difference of the material before and after shearing. The data collection device as described in claim 1, wherein, The aforementioned position alignment unit is based on the characteristic points contained in the rolling actual result data obtained by the aforementioned first data obtaining unit and the characteristic points contained in the rolling actual result data obtained by the aforementioned second data obtaining unit, so that in The plurality of positions that are different in the rolling direction of the material after rolling in the previous step correspond to the plurality of positions that are different in the rolling direction of the material that is rolled in the subsequent step.

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