Data collection device

Abstract

A data collection apparatus includes: a first data acquisition unit that acquires actual rolling data at multiple different positions in the rolling direction of a raw material after being rolled in a previous process; a second data acquisition unit that acquires actual rolling data at multiple different positions in the rolling direction of a raw material after being rolled in a subsequent process; an alignment unit that, based on the actual rolling data acquired by the first data acquisition unit and the actual rolling data acquired by the second data acquisition unit, establishes corresponding alignments between the multiple different positions in the rolling direction of the raw material after being rolled in the previous process and the multiple different positions in the rolling direction of the raw material after being rolled in the subsequent process; a generation unit that generates actual rolling data for each identical point of the raw material at each of the multiple different positions in the rolling direction of the raw material after alignment by the alignment unit; and a storage unit that stores the actual rolling data for each identical point of the raw material.

Description

Technical Field

[0001] This invention relates to a data collection device. Background Technology

[0002] For example, in the steelmaking process of rolled steel, rolling systems are used that have hot rolling production lines and cold rolling production lines, and that allow raw materials (rolled materials) to be rolled separately in multiple production lines or processes.

[0003] In the past, in such rolling systems, quality problems with the coils were sometimes discovered when they reached the final product line. In such cases, when the main cause of the quality problem was located in the upstream process, data from each rolling process was collected and traced back sequentially from the final product line to confirm various rolling information, thereby pinpointing the problem location. Therefore, finding the location of the main cause of the quality problem takes time.

[0004] Furthermore, since the length of the rolled material varies with each rolling process, the actual rolling data for each rolling process is used to manually align the length of the coil in each rolling process, resulting in low accuracy in determining the location of the problem.

[0005] In addition, there are many cases where upstream process data management is not carried out or the cutting length of rolled materials is not accurately determined. The data of downstream processes are not accurately aligned with the data of upstream processes, which also leads to misidentification of the location of key factors.

[0006] For example, in a ferrous / non-ferrous metal factory, once the quality problems of the final product are known, in order to investigate where the main factors of the problem exist in this production line and upstream process production lines, it is necessary to trace back from the final product line, collect and analyze the data managed by each process.

[0007] Furthermore, Patent Document 1 discloses a method and apparatus for predicting anomalies in steelmaking processes, particularly the annealing process where strip steel sheets are continuously heat-treated. Moreover, Patent Document 1 illustrates a method that, based on storing operation and control data at each position along the length of the steel sheet, determines the quality of a desired manufacturing process (annealing) and predicts and prevents quality anomalies.

[0008] Furthermore, Patent Document 2 discloses an auxiliary system for assisting operators in inferring the causes of quality anomalies in manufactured products produced on a steelmaking production line consisting of multiple processes including a quality inspection process. Moreover, Patent Document 2 illustrates a method for matching data from multiple processes to infer the causes, as well as an auxiliary method for operators related to the determination.

[0009] Furthermore, Patent Document 3 discloses a tracking method in feedforward control as a technique for synchronizing the position of steel between multiple processes in the steel manufacturing process. Generally, in the case of feedforward control, a mechanism for detecting the position of the steel is provided in order to store the control input data and position information combined in the previous process. Without such a special mechanism, it is necessary to constrain the material between two stands during simultaneous rolling, or between two processes.

[0010] Existing technical documents

[0011] Patent documents

[0012] Patent Document 1: Japanese Patent No. 4992046

[0013] Patent Document 2: Japanese Patent No. 6116445

[0014] Patent Document 3: Japanese Patent No. 4400253 Summary of the Invention

[0015] The problem that the invention aims to solve

[0016] However, it has been difficult in the past to obtain the same point of the raw material with high precision across multiple rolling processes. The present invention was made to solve the above-mentioned problems, and aims to provide a data collection device that can easily collect actual rolling data of the same point of the raw material in each rolling process, even when the raw material is rolled through multiple rolling processes.

[0017] Methods for solving problems

[0018] A data collection apparatus according to one aspect of the present invention collects actual rolling data from a rolling system in which raw materials are rolled through a preceding process and a subsequent process, characterized by comprising: a first data acquisition unit that acquires actual rolling data at multiple different positions along the rolling direction of the raw material after the preceding process; a first storage unit that stores the actual rolling data acquired by the first data acquisition unit; a second data acquisition unit that acquires actual rolling data at multiple different positions along the rolling direction of the raw material after the subsequent process; a second storage unit that stores the actual rolling data acquired by the second data acquisition unit; and an alignment unit that, based on the data acquired by the first data acquisition unit... The actual rolling data and the actual rolling data obtained by the second data acquisition unit are used to establish corresponding alignments between multiple different positions in the rolling direction of the raw material after the previous rolling process and multiple different positions in the rolling direction of the raw material after the subsequent rolling process; the generation unit establishes corresponding alignments between the actual rolling data stored in the first storage unit and the actual rolling data stored in the second storage unit for each of the multiple different positions in the rolling direction of the raw material after alignment by the alignment unit, thereby generating actual rolling data for each same point of the raw material; and the third storage unit stores the actual rolling data for each same point of the raw material generated by the generation unit.

[0019] Furthermore, preferably, the data collection apparatus of one aspect of the present invention is characterized by further comprising: a shearing data acquisition unit that acquires shearing data, the shearing data representing the lengths of the front and rear ends of the raw material after being sheared in the rolling direction following the previous process; and a calculation unit that calculates the actual inlet length of the raw material for the subsequent process based on the shearing data acquired by the shearing data acquisition unit and the actual rolling data acquired by the first data acquisition unit, and the alignment unit that, based on the actual inlet length of the raw material for the subsequent process calculated by the calculation unit and the actual rolling data acquired by the second data acquisition unit, establishes a corresponding alignment between each of a plurality of different positions in the rolling direction of the raw material after being rolled in the previous process and each of a plurality of different positions in the rolling direction of the raw material after being rolled in the subsequent process.

[0020] Furthermore, preferably, the data collection device of one aspect of the present invention is characterized in that the shearing data acquisition unit acquires the shearing data by calculating the length of the raw material in the rolling direction after shearing detected by the sensor and the weight difference of the raw material before and after shearing.

[0021] Furthermore, preferably, the data collection device of one aspect of the present invention is characterized in that the alignment unit, based on the feature points contained in the actual rolling data obtained by the first data acquisition unit and the feature points contained in the actual rolling data obtained by the second data acquisition unit, establishes a corresponding alignment between each position of a plurality of different positions in the rolling direction of the raw material after rolling in the previous process and each position of a plurality of different positions in the rolling direction of the raw material after rolling in the subsequent process.

[0022] Invention Effects

[0023] According to the present invention, even when raw materials are rolled through multiple rolling processes, it is possible to easily collect actual rolling data for each same point of the raw materials in each rolling process. Attached Figure Description

[0024] Figure 1 This is a diagram illustrating an example configuration of a rolling system equipped with a data collection device according to one embodiment.

[0025] Figure 2 This is a functional block diagram illustrating the functions of a data collection device according to one embodiment.

[0026] Figure 3 This is a diagram illustrating the data stored in the first and second storage units.

[0027] Figure 4 (a) is a graph showing the relationship between the position of the rolling direction on the exit side of the previous process and the thickness of the rolled material. Figure 4 (b) is a graph showing the relationship between the position of the rolling direction on the exit side of the subsequent process and the thickness of the rolled material. Figure 4 (c) is a graph showing the position of the aligned rolling direction and its relationship with the plate thickness in the previous and subsequent processes.

[0028] Figure 5 This is a diagram illustrating the actual rolling data for each same point of the rolled material stored in the third storage section.

[0029] Figure 6 It is a diagram that schematically shows the alignment of the rolling directions within the same production line. Detailed Implementation

[0030] Hereinafter, one embodiment of the rolling system will be described using the accompanying drawings. Figure 1 This is a diagram illustrating an example configuration of a rolling system 1 equipped with a data collection device according to one embodiment. (See diagram below.) Figure 1 As shown, the rolling system 1 is constructed by connecting the hot rolling production line 2 and the cold rolling production line 3 to the data collection device 4 via the control network 10, and rolls the raw material (rolled material) sequentially through multiple rolling processes.

[0031] The control network 10 is, for example, a LAN (Local Area Network) or a network that includes both a control LAN and an information system LAN.

[0032] The hot rolling production line 2 includes, for example, a reheating furnace (RF) 20, a roughing mill (RM) 21, a crop shear (CS) 22, a finishing mill (FM) 23, a runout table (ROT) 24, and a down coiler (DC) 25. Furthermore, the hot rolling production line 2 is equipped with sensors 26-1 to 26-4, and is configured to be controlled by a preceding process control device 27, thus controlling all parts of the hot rolling production line 2.

[0033] In hot rolling production line 2, the roughing mill 21 rough rolls the slab output from the heating furnace 20, and the rolled material, cut by the head cutter 22, is fed to the finishing mill 23. Furthermore, in hot rolling production line 2, the rough-rolled material is further rolled to specified dimensions by the finishing mill 23, cooled by the cooling device 24, and then coiled by the coiler 25. Here, the rolling process performed in hot rolling production line 2 is referred to as the preceding process.

[0034] Sensor 26-1 is located at the exit side of the roughing mill 21 to detect the actual rolling data of the raw material after it has been rolled by the roughing mill 21, and outputs the data to the upstream process control device 27. For example, sensor 26-1 detects various actual values ​​in the rolling process so that the upstream process control device 27 can obtain the length, thickness, width, and temperature of the rolled material at various locations at different positions in the rolling direction (the direction of travel of the rolled material).

[0035] Sensor 26-2 is disposed on the inlet side of the finishing mill 23 to detect the actual rolling data of the raw material fed to the finishing mill 23 and output it to the upstream process control device 27. For example, sensor 26-2 detects various actual values ​​for the raw material so that the upstream process control device 27 can obtain the length, thickness, width, and temperature of the rolled material at various locations in different directions.

[0036] Sensor 26-3 is located at the exit side of the finishing mill 23 to detect the actual rolling data of the raw material after it has been rolled by the finishing mill 23, and outputs the data to the upstream process control device 27. For example, sensor 26-3 detects various actual values ​​in the rolling process so that the upstream process control device 27 can obtain the length, thickness, width, and temperature of the rolled material at various locations in different directions.

[0037] Sensor 26-4 is disposed on the outlet side of cooling device 24 to detect the actual rolling data of the raw material after being cooled by cooling device 24 and output it to the upstream process control device 27. For example, sensor 26-4 detects the actual values ​​after the cooling process so that the upstream process control device 27 can obtain the length, thickness, width and temperature of the rolled material at various locations in different directions.

[0038] Furthermore, the preceding process control device 27 sends the actual rolling data detected by the sensors 26-1 to 26-4 to the data collection device 4 via the control network 10.

[0039] The cold rolling production line 3 includes, for example, an uncoiler 30, an inlet shear 31, a welding machine 32, a looper 33, a rolling mill 34, an outlet shear 35, a tension reel 36, multiple sensors 37, an outlet sensor 38, and a subsequent process control device 39. Furthermore, the cold rolling production line 3 is configured such that the subsequent process control device 39 controls each component constituting the cold rolling production line 3.

[0040] In the cold rolling production line 3, the tail end of the coil of rolled material after being coiled by the coiler 25 of the hot rolling production line 2 is used as the front end to further roll the rolled material after being rolled in the hot rolling production line 2. Here, the rolling process performed in the cold rolling production line 3 is regarded as a subsequent process.

[0041] More specifically, the uncoiler 30 uses the tail end of the coil wound by the coiler 25 as the front end and feeds the rolled material to the inlet shear 31. The inlet shear 31 and the outlet shear 35, in order to trim the front and tail ends of the rolled material, clamp the rolled material through the front and rear pinch rollers (not shown) and cut the rolled material according to the control of the subsequent process control device 39.

[0042] The welding machine 32 has the function of joining coils together by welding and continuously performing rolling processes on multiple coils. The looper 33 stores the rolled material and supplies it to the rolling mill 34.

[0043] Rolling mill 34 further rolls the rolled material. Tension coiler 36 coils the rolled material from rolling mill 34.

[0044] Multiple sensors 37 are disposed around multiple stands within the rolling mill 34 to detect, for example, the thickness of the rolled material and output the data to the subsequent process control device 39. Furthermore, the sensors 37 detect various actual values ​​during the rolling process so that the subsequent process control device 39 can also obtain the length, width, and temperature of the rolled material at multiple locations along the rolling direction.

[0045] Furthermore, the subsequent process control device 39 sends the actual rolling data detected by each sensor 37 and the exit sensor 38 to the data collection device 4 via the control network 10.

[0046] Thus, the rolling system 1 rolls the material through the hot rolling production line 2 (previous process) and the cold rolling production line 3 (subsequent process), and the data collection device 4 collects the actual rolling data in each rolling process.

[0047] Next, the functions of the data collection device 4 will be described in detail. Figure 2 This is a functional block diagram illustrating the functions of a data collection device 4 according to one embodiment. The data collection device 4 is, for example, a computer, and includes a first storage unit 41 that stores actual rolling data of the previous process as a database, a second storage unit 42 that stores actual rolling data of the subsequent process as a database, and a third storage unit 43 that stores data of the same point of the rolled material in the previous and subsequent processes as a database.

[0048] The first storage unit 41 includes a first data acquisition unit 410, a first storage unit 412, and a first information extraction unit 414.

[0049] The first data acquisition unit 410, under the control of the first information extraction unit 414, acquires actual rolling data at multiple positions in different locations along the rolling direction of the rolled material after the previous rolling process via the control network 10, and outputs the data to the first storage unit 412 and the calculation unit 431.

[0050] For example, the first data acquisition unit 410 can also acquire actual rolling data detected by the hot rolling production line 2 for a coil when the coiler 25 of the hot rolling production line 2 has completed the coiling.

[0051] The first storage unit 412, under the control of the first information extraction unit 414, stores the actual rolling data obtained by the first data acquisition unit 410 and forms a database. Furthermore, the first storage unit 412 outputs the stored actual rolling data to the generation unit 433 through access from the generation unit 433.

[0052] For example, Figure 3 As shown, the first storage unit 412 stores the length information, width, thickness and rolling temperature corresponding to the coil of the rolled material.

[0053] The second storage unit 42 includes a second data acquisition unit 420, a second storage unit 422, and a second information retrieval unit 424.

[0054] The second data acquisition unit 420, under the control of the second information extraction unit 424, acquires actual rolling data at multiple positions in different locations along the rolling direction of the rolled material after subsequent rolling processes via the control network 10, and outputs it to the second storage unit 422 and the alignment unit 432.

[0055] For example, the second data acquisition unit 420 can also acquire actual rolling data detected by the cold rolling production line 3 for a coil when the tension coiler 36 of the cold rolling production line 3 has completed the coil winding.

[0056] The second storage unit 422, under the control of the second information extraction unit 424, stores the actual rolling data obtained by the second data acquisition unit 420 and forms a database. Furthermore, the second storage unit 422 outputs the stored actual rolling data to the generation unit 433 through access from the generation unit 433.

[0057] For example with Figure 3 As shown in the example, the second storage unit 422 stores the length information, width, thickness and rolling temperature corresponding to the coil of the rolled material.

[0058] The third storage unit 43 includes a cut data acquisition unit 430, a calculation unit 431, an alignment unit 432, a generation unit 433, and a third storage unit 434.

[0059] The shearing data acquisition unit 430 acquires shearing data via the control network 10, which respectively represent the lengths of the front and rear ends of the rolled material after shearing in the rolling direction after passing through the previous process, and outputs the data to the calculation unit 431.

[0060] For example, the shearing data acquisition unit 430 can also acquire shearing data through the following calculation, which is based on the length of the rolled material in the rolling direction after shearing and the weight difference of the rolled material before and after shearing, detected by the hot rolling production line 2 and the cold rolling production line 3.

[0061] In addition, in order to obtain the length of the sheared rolled material more accurately, the shearing data acquisition unit 430 may be configured to calculate the length of the sheared rolled material by using the weight of the hot-rolled coil and the weight of the cold-rolled coil, taking into account the weight loss caused by pickling, the weight gain caused by plating, etc.

[0062] In this case, the shear data acquisition unit 430 can also be configured to use the length calculated based on weight when there is a difference between the detected length and the length calculated based on weight. Furthermore, the shear data acquisition unit 430 can also be configured to use the ratio of the length of the rolled material to improve calculation accuracy.

[0063] The calculation unit 431 calculates the actual inlet side length of the rolled material for subsequent processes based on the shearing data obtained by the shearing data acquisition unit 430 and the actual rolling data obtained by the first data acquisition unit 410, and outputs it to the alignment unit 432.

[0064] The alignment unit 432 performs a process based on the actual rolling data obtained by the first data acquisition unit 410 and the actual rolling data obtained by the second data acquisition unit 420 to establish corresponding alignment between multiple positions in the rolling direction of the rolled material after the previous process and multiple positions in the rolling direction of the rolled material after the subsequent process.

[0065] For example, the alignment unit 432 performs a process based on the feature points contained in the actual rolling data acquired by the first data acquisition unit 410 and the feature points contained in the actual rolling data acquired by the second data acquisition unit 420, to establish corresponding alignment between multiple positions in the rolling direction of the rolled material after the previous process and multiple positions in the rolling direction of the rolled material after the subsequent process. At this time, the alignment unit 432 performs alignment based on the reversal of the length direction of the rolled material, changes in length caused by temperature, etc.

[0066] Furthermore, when the shearing data is obtained by the shearing data acquisition unit 430, the alignment unit 432 performs a process to establish corresponding alignment between multiple positions in the rolling direction of the rolled material after the previous process and multiple positions in the rolling direction of the rolled material after the subsequent process, based on the actual inlet side length of the rolled material for the subsequent process calculated by the calculation unit 431 and the actual rolling data obtained by the second data acquisition unit 420.

[0067] Figure 4 This is a diagram showing a specific example of how the alignment part 432 aligns multiple different positions in the rolling direction of the rolled material before and after. Figure 4 (a) is a graph showing the relationship between the position of the rolling direction on the exit side of the previous process and the thickness of the rolled material. Figure 4 (b) is a graph showing the relationship between the position of the rolling direction on the exit side of the subsequent process and the thickness of the rolled material. Figure 4 (c) is a graph showing the position of the aligned rolling direction and its relationship with the plate thickness in the previous and subsequent processes.

[0068] Furthermore, since the rolled material is further rolled in subsequent processes, therefore Figure 4 The range of the horizontal axis in (b) is greater than Figure 4 The horizontal axis in (a) has a large range. That is, the alignment part 432 can be reduced. Figure 4 The range of the horizontal axis in (b) is to be consistent with... Figure 4 The range of the horizontal axis in (a) corresponds to this, and can also be magnified. Figure 4 The range of the horizontal axis in (a) is related to... Figure 4 The range of the horizontal axis in (b) corresponds to this.

[0069] For example Figure 4 As illustrated, the alignment unit 432 extracts feature points from the waveform information of the plate width and thickness. If the feature points shift between the hot-rolled and cold-rolled products, phase displacement (sliding) can be used to align the feature points. Furthermore, the alignment unit 432 can also adjust the scaling factor before and after the feature points for alignment, thereby improving accuracy.

[0070] like Figure 4 As shown, after the alignment part 432 aligns multiple positions of the rolled material in different directions, the plate thickness in the previous process and the plate thickness in the subsequent process can be easily compared according to each position in the rolling direction.

[0071] Furthermore, the alignment unit 432 outputs information to the generation unit 433 indicating multiple different positions in the rolling direction of the aligned rolled material.

[0072] The generation unit 433 establishes a correspondence between the actual rolling data stored in the first storage unit 412 and the actual rolling data stored in the second storage unit 422 for different positions in the rolling direction of the rolled material after alignment by the alignment unit 432, generates the actual rolling data for each same point of the rolled material, and outputs it to the third storage unit 434.

[0073] The third storage unit 434 stores the actual rolling data of each same point of the rolled material generated by the generation unit 433, and forms a database.

[0074] Figure 5 This is a diagram illustrating the actual rolling data for each same point of the rolled material stored in the third storage section 434. For example... Figure 5 As shown, after the alignment unit 432 aligns multiple positions of the rolled material in different rolling directions, the third storage unit 434 can easily compare the thick plate in the previous process with the thick plate in the subsequent process at each position in the rolling direction.

[0075] Thus, when the rolling stock is rolled through multiple rolling processes in the rolling system 1, the data collection device 4 can easily collect actual rolling data for each same point in each rolling process, making quality analysis of each rolling process easier. That is, even if quality problems are found in the final coil, the data collection device 4 can easily pinpoint the location of the problem, facilitating the analysis of the actual rolling process in both preceding and subsequent stages.

[0076] Furthermore, in the above embodiments, the preceding process is set as a hot rolling process, and the subsequent process is set as a cold rolling process, but if... Figure 6 As shown, the data collection device 4 can also be configured to set the preceding process as roughing in a hot rolling production line and the subsequent process as finishing in a hot rolling production line, creating a database with the rolling directions aligned within the same production line. In this case, the data collection device 4 uses sensors 26-1 to 26-4 (see reference). Figure 1 The actual data of each rolling process detected.

[0077] In addition, the data collection device 4 can also have the following functions: it can also use sensors to detect the cutting length of the head in the hot rolling production line, and it can also use the difference between the slab weight and the coil weight, as well as the scale weight (estimated value) for correction.

[0078] Furthermore, when the front and rear ends of the rolled material are reversed between processes such as hot rolling followed by cold rolling and cold rolling followed by annealing, the reversed process is also carried out, such as using the rear end of the previous process as the front end of the subsequent process.

[0079] In addition, when the roll material is split or combined between the previous process and the subsequent process, the data collection device 4 uses the roll material ID, which must be managed as manufacturing process information.

[0080] In addition, some or all of the functions of the data collection device 4 can be constructed by hardware such as PLD (Programmable Logic Device) and FPGA (Field Programmable Gate Array), or they can be constructed as programs executed by processors such as CPU.

[0081] Explanation of reference numerals in the attached figures

[0082] 1…rolling system, 2…hot rolling production line, 3…cold rolling production line, 4…data collection device, 10…control network, 20…heating furnace, 21…roughing mill, 22…head cutter, 23…finishing mill, 24…cooling device, 25…coiler, 26-1~26-4…sensors, 27…pre-process control device, 30…uncoiler, 31…inlet shear, 32…welding machine, 33…loop looper, 34…mill, 35…outlet shear, 36…tension coiler, 37…transmission Sensor, 38…exit sensor, 39…subsequent process control device, 41…first storage unit, 42…second storage unit, 43…third storage unit, 410…first data acquisition unit, 412…first storage unit, 414…first information extraction unit, 420…second data acquisition unit, 422…second storage unit, 424…second information extraction unit, 430…cut data acquisition unit, 431…calculation unit, 432…alignment unit, 433…generation unit, 434…third storage unit.

Claims

1. A data collection device for collecting actual rolling data from a rolling system in which raw materials are rolled through preceding and subsequent processes, characterized in that, have: The first data acquisition unit acquires actual rolling data at multiple locations in different positions along the rolling direction of the raw material after it has been rolled by the previous process. The first storage unit stores the actual rolling data obtained by the first data acquisition unit; The second data acquisition unit acquires actual rolling data at multiple locations in different positions along the rolling direction of the raw material after it has been rolled through subsequent processes. The second storage unit stores the actual rolling data acquired by the second data acquisition unit; The alignment unit, based on the actual rolling data obtained by the first data acquisition unit and the actual rolling data obtained by the second data acquisition unit, establishes corresponding alignments between multiple positions in the rolling direction of the raw material after rolling in the previous process and multiple positions in the rolling direction of the raw material after rolling in the subsequent process. The generation unit establishes a correspondence between the actual rolling data stored in the first storage unit and the actual rolling data stored in the second storage unit for each of the multiple different positions in the rolling direction of the raw material after alignment by the alignment unit, thereby generating actual rolling data for each same point of the raw material. as well as The third storage unit stores the actual rolling data of the raw materials generated by the generating unit at each same point.

2. The data collection device as described in claim 1, characterized in that, It also has: The shearing data acquisition unit acquires shearing data, which represents the length of the raw material after shearing at the front and rear ends in the rolling direction after being rolled by the previous process. as well as The calculation unit, based on the shear data obtained by the shear data acquisition unit and the actual rolling data obtained by the first data acquisition unit, calculates the actual inlet length of the raw material for subsequent processes. The alignment unit, based on the actual inlet side length of the raw material for the subsequent process calculated by the calculation unit and the actual rolling data obtained by the second data acquisition unit, establishes a corresponding alignment between each position of a plurality of different positions in the rolling direction of the raw material after the previous process and each position of a plurality of different positions in the rolling direction of the raw material after the subsequent process.

3. The data collection device as described in claim 2, characterized in that, The shearing data acquisition unit obtains the shearing data by calculating the length of the raw material in the rolling direction after shearing, as detected by the sensor, and the weight difference of the raw material before and after shearing.

4. The data collection device as described in claim 1, characterized in that, The alignment unit, based on the feature points contained in the actual rolling data obtained by the first data acquisition unit and the feature points contained in the actual rolling data obtained by the second data acquisition unit, establishes a corresponding alignment between each position of a plurality of different positions in the rolling direction of the raw material after the previous process rolling and each position of a plurality of different positions in the rolling direction of the raw material after the subsequent process rolling.

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