Winding control device, winding record accumulating device, winding control method, winding record accumulating method, and program

Abstract

To suppress a belt-like material released from restraint by a restraint device from meandering without using a large facility.SOLUTION: A wind-up control device 200 obtains a past-material tension index result value for processing which is a result value of a tension index in a steel strip M, set based on a value of a telescopic amount in the steel strip M wound up in the past by a coiler 30, and controls motion of a pinch roll 40 in a rear end-side control period of time including a period of time from a timing at which the steel strip is released from restraint by a finish-rolling machine 10 (a rolling stand F7) until the steel strip M passes through the pinch roll 40, using the obtained past-material tension index result value for processing.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a winding control device, a winding history accumulating device, a winding control method, a winding history accumulating method, and a program, and is particularly suitable for use in winding a strip material. [Background technology]

[0002] In order to process a strip material, the strip material is conveyed while being restrained by a restraining device, and after being released from the restraint by the restraining device, the strip material is wound by a winding device. For example, a steel strip such as a hot-rolled steel strip is rolled by a rolling mill such as a finishing mill and then wound into a coil on a coiler (mandrel) (hereinafter, the coiled strip may also be referred to as a coil, as necessary). When winding the strip material into a coil in this manner, tension is applied to the strip material by pinch rolls installed between the rolling mill and the coiler. When the rear end of the strip material passes through the rolling mill, tension is no longer applied to the strip material between the rolling mill and the coiler, and the strip material is released from the restraint by the rolling mill. Therefore, there is a risk of the strip material meandering. When the strip meanders, for example, the strip may come into contact with a side guide arranged in front of the pinch rolls, which may cause threading problems such as stopping the transport of the strip, or the end faces of the coil may not be aligned, causing a disturbance in the coil winding shape (so-called telescoping) or drawing. For this reason, it is necessary to appropriately control the pinch rolls when winding the strip while it is free from the constraint of the rolling mill.

[0003] Patent Document 1 discloses that after the rear end of a metal strip has passed through a finishing rolling mill, the actual value of the current of a motor that drives a pinch roll is converted into tension applied to the metal strip by the pinch roll, and the pinch roll gap is adjusted based on the difference between the converted tension and a tension command value. Patent Document 2 discloses that a looper is installed on the inlet side of a pinch roll and a tension detector is installed on the looper, a speed command for the pinch roll is calculated based on the deviation of the tension of the steel strip measured by the tension detector from a predetermined value, and a current command for the motor that drives the pinch roll is calculated based on the deviation between the speed command and the actual speed of the pinch roll. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4622488 [Patent Document 2] Patent No. 5838534 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the technology described in Patent Document 1, the tension of the strip material is controlled based on the actual value of the current of the motor that drives the pinch rolls while the strip material is being transported. Therefore, there is a risk that the accuracy of estimating the tension of the strip material that is released from the constraint of the rolling mill will be low. Furthermore, in the technology described in Patent Document 2, when winding the strip material that is released from the constraint of the rolling mill, it is necessary to add equipment such as a looper for detecting the tension downstream of the rolling mill (at the entry side of the pinch rolls). As described above, the techniques described in Patent Documents 1 and 2 cannot prevent the strip from meandering after being released from the restraint by the restraining device without using large-scale equipment.

[0006] The present invention has been made in consideration of the above problems, and aims to suppress the meandering of a strip of material after it has been released from restraint by a restraining device without using large-scale equipment. [Means for solving the problem]

[0007] The winding control device of the present invention is a winding control device that controls the operation of a pinch roll installed at a position between a restraining device that restrains and transports a strip material and a winding device that winds up the strip material that has passed through the restraining device, and controls the operation of a pinch roll that winds up the strip material that has been previously wound by the winding device. Among the past material tension indicator actual values ​​for processing, which are actual values ​​of the tension indicator in the strip material, from the past material tension indicator actual values ​​for processing that satisfy predetermined conditions, The value of the winding style index, which is an index related to the winding style of The actual value of the tension index of the past material for processing when the value corresponds to the minimum , a processing line including the restraining device, the winding device, and the pinch roll, a processing past material tension indicator actual value corresponding to the strip material to be processed. as and a pinch roll control unit that controls the operation of the pinch roll when the strip material to be processed is being transported on the transport path, wherein the tension indicator is a physical quantity that affects the tension of the strip material between the restraining device and the pinch roll, or the tension of the strip material between the pinch roll and the restraining device, and the pinch roll control unit controls the operation of the pinch roll when the strip material to be processed is being transported on the transport path. As the target value of the tension index The operation of the pinch rolls is controlled during a trailing edge control period that includes the period from when the strip material to be processed is released from the restraint by the restraining device until it passes through the pinch rolls. The winding history accumulating device of the present invention is a winding history accumulating device that calculates and stores the processing past material tension indicator result value acquired by a winding control device, and includes a storage past material tension indicator result acquisition unit that acquires a storage past material tension indicator result value that is the result value of the tension indicator in a strip-shaped material, a winding shape indicator acquisition unit that acquires the value of the winding shape indicator in a strip-shaped material that indicates the storage past material tension indicator result value, and based on the storage past material tension indicator result value acquired by the storage past material tension indicator result acquisition unit and the value of the winding shape indicator in a strip-shaped material that indicates the storage past material tension indicator result value, Among the past material tension indicator result values ​​for storage that satisfy a predetermined condition, the past material tension indicator result value for storage that corresponds to the value of the winding shape indicator being the smallest is The tension index of the past material for processing as and a memory unit that stores past material processing performance information indicating the relationship between the past material processing tension index actual value determined by the past material processing tension index actual value determination unit and strip material information, which is information regarding the strip material that indicates the past material processing tension index actual value.

[0008] The winding control method of the present invention is a winding control method for controlling the operation of a pinch roll installed at a position between a restraining device that restrains and transports a strip material and a winding device that winds up the strip material that has passed through the restraining device, and Among the past material tension indicator actual values ​​for processing, which are actual values ​​of the tension indicator in the strip material, from the past material tension indicator actual values ​​for processing that satisfy predetermined conditions, The value of the winding style index, which is an index related to the winding style of The actual value of the tension index of the past material for processing when the value corresponds to the minimum , a processing line including the restraining device, the winding device, and the pinch roll, a processing past material tension indicator actual value corresponding to the strip material to be processed. as and a pinch roll control step of controlling the operation of the pinch roll when the strip material to be processed is being transported on the transport path, wherein the tension index is a physical quantity that affects the tension of the strip material between the restraining device and the pinch roll, or the tension of the strip material between the pinch roll and the restraining device, and the pinch roll control step controls the operation of the pinch roll when the strip material to be processed is being transported on the transport path. As the target value of the tension index The operation of the pinch rolls is controlled during a trailing edge control period that includes the period from when the strip material to be processed is released from the restraint by the restraining device until it passes through the pinch rolls. The winding record accumulation method of the present invention is a winding record accumulation method for determining and storing the past material tension indicator actual value for processing acquired by a winding control method, and includes a past material tension indicator actual value for storage acquisition step for acquiring a past material tension indicator actual value for storage, which is an actual value of the tension indicator in a strip-shaped material, a winding form indicator acquisition step for acquiring the value of the winding form indicator in a strip-shaped material indicating the past material tension indicator actual value for storage, and based on the past material tension indicator actual value for storage acquired by the past material tension indicator actual value acquisition step and the value of the winding form indicator in a strip-shaped material indicating the past material tension indicator actual value for storage, Among the past material tension indicator result values ​​for storage that satisfy a predetermined condition, the past material tension indicator result value for storage that corresponds to the value of the winding shape indicator being the smallest is The tension index of the past material for processing asand a storage process for storing past material processing performance information indicating the relationship between the past material processing tension indicator performance value determined by the past material processing tension indicator performance determination process and strip material information, which is information regarding the strip material indicating the past material processing tension indicator performance value.

[0009] A first example of the program of the present invention causes a computer to function as each part of the winding control device. A second example of the program of the present invention causes a computer to function as each part of the winding history accumulation device. [Effects of the Invention]

[0010] According to the present invention, it is possible to suppress meandering of a strip material after it has been released from restraint by a restraining device without using any large-scale equipment. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram showing an example of a schematic configuration of a hot rolling line. [Figure 2] FIG. 2 is a diagram illustrating an example of a functional configuration of a winding history accumulating device. [Figure 3] 10A and 10B are diagrams illustrating an example of a process performed by a winding history accumulating device. [Figure 4] FIG. 10 is a diagram illustrating an example of the relationship between a pinch roll motor load factor and time. [Figure 5] FIG. 2 is a diagram illustrating an example of a functional configuration of a winding control device. [Figure 6] 10 is a flowchart illustrating an example of a method for accumulating past material performance information for processing. [Figure 7] 10 is a flowchart illustrating an example of a method for updating past material performance information for processing. [Figure 8] 10 is a flowchart illustrating an example of a winding control method. [Figure 9] FIG. 10 is a diagram showing an example of the relationship between pinch roll tension and time. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment, as will be explained in the modified examples that will be explained from time to time in the description of this embodiment and in the "Modified Examples" section that will be described later. Note that the fact that the objects to be compared are the same in terms of length, position, size, spacing, etc. includes not only cases where they are exactly the same, but also cases where they are different within the scope of the gist of the invention (for example, cases where they differ within the tolerance range determined at the time of design). Also, in each drawing, for the convenience of explanation and notation, some of the configurations have been omitted or simplified.

[0013] [Hot rolling line overview] Fig. 1 is a diagram showing an example of the schematic configuration of a hot rolling line. The x-y-z coordinate system shown in Fig. 1 is shown for the purpose of explaining the directions. The symbol indicating the x-axis of the x-y-z coordinate system (a symbol consisting of a white circle (◯) with a black circle (●) inside) indicates that the direction is from the back side to the front side of the paper, and this direction indicates that the positive direction of the x-axis.

[0014] In FIG. 1, the finishing mill 10 is a tandem rolling mill in which a steel strip M that has been rough-rolled by a roughing mill (not shown) and is being transported on a transport path R using transport rollers (not shown) is continuously finish-rolled by multiple rolling stands (seven rolling stands F1 to F7 in the example shown in FIG. 1). Note that FIG. 1 illustrates a case in which the steel strip M is transported in the positive direction of the y-axis (from left to right on the paper). That is, in the hot rolling line shown in FIG. 1, the downstream side is the positive side of the y-axis and the upstream side is the negative side of the y-axis. Also, in FIG. 1, the steel strip M and the transport path R coincide at the position where the steel strip M is present (the transport path R shown by the dashed line overlaps with the steel strip M shown by the solid line).

[0015] Each of the rolling stands F1 to F7 constituting the tandem rolling mill is provided with screw down devices 11a to 11g and load cells 12a to 12g. The roll down devices 11a to 11g adjust the roll down positions of the steel strip M when it is finish rolled by the rolling stands F1 to F7. The load cells 12a to 12g measure the rolling load that occurs when the steel strip M passes between the upper and lower work rolls of the rolling stands F1 to F7 and is rolled.

[0016] Although Fig. 1 illustrates an example in which there are seven rolling stands F1 to F7, the number of rolling stands is not limited to seven. Fig. 1 also illustrates an example in which screw down devices 11a to 11g and load cells 12a to 12g are installed above each of the rolling stands F1 to F7. However, the arrangement of the screw down devices 11a to 11g and load cells 12a to 12g is not limited to the arrangement shown in Fig. 1. For example, the screw down devices 11a to 11g and load cells 12a to 12g may be installed below each of the rolling stands F1 to F7. Furthermore, the load cells 12a to 12g may be installed both above and below the rolling stands F1 to F7.

[0017] 1, until the rear end of the steel strip M passes through the rolling stands F1 to F7, the steel strip M is restrained (cannot move freely) by the upper and lower work rolls of the rolling stands F1 to F7. In this embodiment, the steel strip M is an example of a strip-shaped material, and the finishing rolling mill 10 is an example of a restraining device that restrains the movement of the strip-shaped material.

[0018] The HMD (Hot Metal Detector) 20 is installed at a position between a roughing mill and a finishing mill 10 (not shown). The HMD 20 is equipped with an infrared receiver. The HMD 20 detects the leading and trailing ends of the steel strip M based on the state of reception of infrared rays emitted from the high-temperature steel strip M by the receiver. For example, when the HMD 20 changes from a state in which it is not detecting infrared rays to a state in which it is detecting them, it determines that it has detected the leading end of the steel strip M and outputs a detection signal indicating that the leading end of the steel strip M has passed the HMD 20. Furthermore, when the HMD 20 changes from a state in which it is detecting infrared rays to a state in which it is not detecting them, it determines that it has detected the trailing end of the steel strip M and outputs a detection signal indicating that the trailing end of the steel strip M has passed (left) the HMD 20. Note that the HMD 20 may be considered to have detected infrared rays when the signal strength of the infrared rays exceeds a threshold, and not to have detected infrared rays when the signal strength of the infrared rays is below the threshold. When the leading or trailing end of the steel strip M passes through (exits) a certain piece of equipment (such as HMD20), it means that the leading or trailing end of the steel strip M passes through (exits) the installation position of the equipment in the conveying direction (direction along the conveying path R), and in the example shown in Figure 1, it means that the leading or trailing end of the steel strip M passes through the y coordinate of the equipment. In addition, the installation position of the equipment refers to the position where the equipment performs processing on the steel strip M (for example, detecting the leading and trailing ends and rolling).

[0019] The coiler 30 is installed at the most downstream position of the hot rolling line. The coiler 30 includes a mandrel 31. The steel strip M that has been finish-rolled in the finishing rolling mill 10 is wound around the mandrel 31 and wound into a coil. In the following description, the steel strip M wound into a coil will be referred to as a coil as necessary. In this embodiment, the coiler 30 is illustrated as an example of a winding device that winds up a strip material.

[0020] The pinch rolls 40 are installed at a position between the finishing rolling mill 10 and the coiler 30. The pinch rolls 40 include a pair of an upper roll 41 and a lower roll 42. The pinch rolls 40 adjust the gap between the upper roll 41 and the lower roll 42, and apply tension to the steel strip M being transported on the transport path R.

[0021] An upper pinch roll motor 43 is attached to the upper roll 41 of the pinch roll 40. A lower pinch roll motor 44 is attached to the lower roll 42 of the pinch roll 40. The upper pinch roll motor 43 is a motor for rotating the upper roll 41. The lower pinch roll motor 44 is a motor for rotating the lower roll 42.

[0022] The operation of the upper pinch roll motor 43 and the lower pinch roll motor 44 is controlled by a control device (not shown). The control device, for example, performs speed control to control the rotational speeds of the upper roll 41 and the lower roll 42. For example, the control device controls the rotational speeds of the upper roll 41 and the lower roll 42 so that the rotational speeds of the upper roll 41 and the lower roll 42 correspond to a value obtained by multiplying the actual value of the transport speed of the steel strip M that has passed through the finishing rolling mill 10 by a lead rate that exceeds 1. The control of the upper roll 41 and the lower roll 42 by the control device is realized by known technology and is not limited to such control.

[0023] Furthermore, the pinch roll 40 is provided with a pressure reducing device 45 and a load cell 46 . The reduction device 45 adjusts the reduction position (gap) of the steel strip M when it passes through the pinch rolls 40 (between the upper roll 41 and the lower roll 42). The load cell 46 measures the load applied to the steel strip M passing through the pinch rolls 40 (between the upper roll 41 and the lower roll 42).

[0024] Note that Fig. 1 illustrates an example in which one pinch roll 40 is installed between the finish rolling mill 10 and the coiler 30. However, the number of pinch rolls installed between the finish rolling mill 10 and the coiler 30 is not limited to one, and may be two or more. Fig. 1 also illustrates an example in which a screw down device 45 and a load cell 46 are installed above the pinch roll 40. However, the arrangement of the screw down device 45 and the load cell 46 is not limited to that shown in Fig. 1.

[0025] The side guides 50 are installed between the finishing rolling mill 10 and the pinch rolls 40. The side guides 50 are used to adjust the position of the steel strip M in the width direction (x-axis direction) while it is being transported on the transport path R. As described above, in this embodiment, a processing line including a restraining device, a winding device, and pinch rolls is a hot rolling line. Note that the hot rolling line itself can be realized by known technology and is not limited to the configuration shown in FIG.

[0026] In this embodiment, a case where a winding history accumulating device 100 and a winding control device 200 are used in the above-described hot rolling line to prevent the steel strip M from meandering due to being released from the constraint of the finishing rolling mill 10 is illustrated. In this embodiment, a case where the winding history accumulating device 100 stores the result value of the tension index obtained from the rolling results of the steel strip M in the past is illustrated. Also, a case where the winding control device 200 controls the operation of the pinch rolls 40 so that the tension index of the steel strip M to be rolled matches the result value of the tension index stored in the winding history accumulating device 100 is illustrated. Here, the tension index is the tension of the strip between the constraint device that constrains the strip and the pinch roll, or a physical quantity that affects the tension of the strip between the constraint device and the pinch roll. An example of the winding history accumulating device 100 and the winding control device 200 will be described below.

[0027] [Winding record accumulation device 100] 2 is a diagram showing an example of the functional configuration of the winding history accumulation device 100. The winding history accumulation device 100 is a device that obtains and stores past material history information that indicates the relationship between strip material information, which is information about the strip material wound by the winding device, and a past material tension index actual value for processing, which is an actual value of the tension index for the strip material determined based on the value of a winding shape index, which is an index about the winding shape of the strip material.

[0028] As described above, in this embodiment, the strip material is a steel strip M and the winding device is a coiler 30. In this case, the strip material wound by the winding device is a coil (strip material wound in a coil shape). In this embodiment, strip material information is also referred to as coil information as needed.

[0029] As described above, the tension index is a physical quantity that affects the tension of the strip material between the restraining device and the pinch roll, or the tension of the strip material between the restraining device and the pinch roll, and in this embodiment, the restraining device is illustrated as a finishing rolling mill 10. Therefore, the tension index is a physical quantity that affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch roll 40, or the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch roll 40.

[0030] In this embodiment, the tension indicator is a physical quantity that affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40. More specifically, the tension indicator is a load factor of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. The load factor is expressed as the ratio of the motor's operating current to the motor's rated current (motor operating current / motor rated current). The load factor may also be expressed as a percentage. The motor's operating current is, for example, the effective value of the current flowing through the motor's stator coil at each time.

[0031] In this embodiment, an example will be shown in which the arithmetic mean value of the load factor of the upper pinch roll motor 43 at a certain time and the load factor of the lower pinch roll motor 44 at that time is the load factor of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch roll 40 at that time. In the following description, the load factors of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch roll 40 will also be referred to as pinch roll motor load factors as necessary.

[0032] A high pinch roll motor load factor corresponds to a high operating current of the upper pinch roll motor 43 and the lower pinch roll motor 44. A high operating current of the upper pinch roll motor 43 and the lower pinch roll motor 44 corresponds to a high rotational speed of the upper pinch roll motor 43 and the lower pinch roll motor 44. The faster the rotational speed of the upper pinch roll motor 43 and the lower pinch roll motor 44 is compared to the rotational speed of the finishing rolling mill 10 (the work rolls of the rolling stands F1 to F7), the greater the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40. Therefore, the pinch roll motor load factor affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40.

[0033] The hardware of the winding history accumulating device 100 is realized by using, for example, an information processing device including a processor, a main storage device, an external storage device, and an input / output device, a PLC (Programmable Logic Controller), or dedicated hardware. Fig. 3 is a diagram for explaining an example of processing performed by the winding history accumulating device 100. An example of functions provided in the winding history accumulating device 100 will be described below with reference to Figs. 2 and 3.

[0034] <Storage-time band-shaped material information acquisition unit 110> The storage time strip material information acquisition unit 110 acquires strip material information, which is information about the strip material wound by the winding device. As described above, in this embodiment, the strip material information is also referred to as coil information. In the following description, the coil information acquired by the storage time strip material information acquisition unit 110 is also referred to as storage time coil information, as necessary, to distinguish it from the coil information (processing time coil information) acquired by the processing time strip material information acquisition unit 210 of the winding control device 200, which will be described later.

[0035] The stored coil information includes attribute information indicating the attributes of the steel strip M (coil) wound by the winding device. The stored coil information may also include transported strip status information indicating the status of the steel strip M being transported on the transport path R. This embodiment illustrates a case in which the attribute information includes information indicating the coil's width, thickness, and material, and the rolling status information includes the transport speed of the steel strip M. That is, this embodiment illustrates a case in which the stored coil information includes the coil's width, thickness, and material, and the transport speed of the steel strip M. The transport speed of the steel strip M includes, for example, the transport speed of the steel strip M from when the leading end passes the HMD 20 until the trailing end is wound by the coiler 30. The transport speed of the steel strip M may be a target value or a measured value. The stored coil information is also assumed to include coil identification information.

[0036] In this embodiment, the case where the storage time strip material information acquisition unit 110 receives the storage time coil information from a higher-level computer that manages the operation of the hot rolling line is exemplified. However, the acquisition form of the storage time coil information is not limited to reception from an external device. For example, the storage time strip material information acquisition unit 110 may acquire the storage time coil information by inputting the storage time coil information into a user interface of the winding history accumulation device 100. Furthermore, the storage time strip material information acquisition unit 110 may acquire the storage time coil information by reading out the storage time coil information stored in a portable storage medium.

[0037] The storage time strip material information acquisition unit 110 stores the storage time coil information in the coil information column of the all coil actual data storage table 310 shown in FIG. 3. In FIG. 3, "coil information A to N" shown next to the all coil actual data storage table 310 indicates that multiple types (N types) of coil information are stored as multiple pieces of storage time coil information that are different from each other. Here, different storage time coil information means that at least one of the items of storage time coil information (thickness, width, material, conveying speed) is different. Note that A to N are added for convenience to indicate that there are multiple types of information as storage time coil information, and the storage time coil information stored in the all coil actual data storage table 310 is not limited to 14 types. It is preferable that the storage time strip material information acquisition unit 110 acquires storage time coil information for all types of steel strip M that are expected to be used as the steel strip M to be rolled on the hot rolling line.

[0038] <Accumulated past material tension index performance acquisition unit 120> The past material tension indicator result acquisition unit 120 for storage acquires a past material tension indicator result value for storage, which is an actual value of the tension indicator for the strip material. As described above, in this embodiment, the tension indicator is a pinch roll motor load factor, as an example. Therefore, in this embodiment, the past material tension indicator result acquisition unit 120 for storage acquires an actual value of the pinch roll motor load factor.

[0039] As described above, in order to calculate the pinch roll motor load factor, the operating current and rated current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40 are required. The storage past material tension indicator result acquisition unit 120 acquires the effective value of the operating current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. The storage past material tension indicator result acquisition unit 120 also stores in advance the rated current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. The storage past material tension indicator result acquisition unit 120 calculates the pinch roll motor load factor as described above using the effective value of the operating current and the rated current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. The storage past material tension indicator result acquisition unit 120 acquires the effective value of the operating current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40 from time to time (for example, at a predetermined cycle) during the rear end side control period.

[0040] Fig. 4 is a diagram showing an example of the relationship between the pinch roll motor load factor and time. In Fig. 4, HMD exit indicates the timing when the rear end of the steel strip M passes through the HMD 20. F7 exit indicates the timing when the rear end of the steel strip M passes through the finishing rolling mill 10 (rolling stand F7). P / R exit indicates the timing when the rear end of the steel strip M passes through the pinch rolls 40.

[0041] The rear end side control period is a period during which the winding control device 200, which will be described later, executes control to suppress meandering of the strip material due to the strip material being released from the restraint by the restraining device. The rear end side control period is a period that includes the period from the timing when the strip material is released from the restraint by the restraining device until the rear end of the strip passes through the pinch rolls 40. In this embodiment, the timing when the strip material is released from the restraint by the restraint device is the timing when the rear end of the steel strip M passes through the finishing rolling mill 10 (rolling stand F7).

[0042] The start timing of the rear end side control period may be any timing after the winding device starts winding the strip material and before the strip material is released from the restraining device. s However, the start timing of the rear end side control period does not coincide with the timing t t when the rear end of the steel strip M passes through the HMD 20. s The start timing of the rear end side control period may be, for example, the timing when the rear end of the steel strip M passes a predetermined position (for example, rolling stand F1 or F2) in the finishing rolling mill 10. Whether or not the rear end of the steel strip M has passed through the rolling stands F1 to F7 is determined, for example, by whether or not the rolling load measured by the load cells 12a to 12g has become less than a threshold value.

[0043] In addition, the timing of the end of the rear end side control period may be any timing as long as it is before the timing when the winding of the strip by the winding device is completed. e However, the end timing of the rear end side control period does not coincide with the timing t when the rear end of the steel strip M passes through the pinch rolls 40. e The timing at which the rear end side control period ends is, for example, the timing t when the rear end of the steel strip M passes through the pinch roll 40. e The predetermined time may be, for example, the time expected to elapse after the rear end of the steel strip M passes through the pinch rolls 40 until the pinch roll motor load factor becomes less than the threshold value.

[0044] The past material tension indicator result acquisition unit 120 for storage calculates the pinch roll motor load factor at each time when the effective value is acquired, based on the effective value and rated current of the operating current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. In this way, the actual value of the pinch roll motor load factor at each time during the rear end side control period is calculated as time-series data. In the following description, the actual value of the pinch roll motor load factor at each time during the rear end side control period calculated in this way is also referred to as the past material load factor result value for storage, as necessary.

[0045] The storage past material tension indicator performance acquisition unit 120 also acquires the coil operation schedule from the above-mentioned host computer. The operation schedule includes, for example, the coil identification information and information indicating the scheduled production time or production order of the coil.

[0046] The past material tension index result acquisition unit 120 for storage identifies the identification information of the coil obtained from the steel strip M being transported on the transport path R when the past material load rate result value for storage is calculated based on the operation schedule. Then, the past material tension index result acquisition unit 120 for storage associates the past material load rate result value for storage with the coil information at storage to which the same identification information as the identified identification information is added, and stores the past material load rate result value for storage in the load rate result value column of the all coil result storage table 310.

[0047] The storage past material tension indicator result acquisition unit 120 calculates the storage past material load rate result value as described above and stores it in association with the storage time coil information for each of the multiple types (A to N types in FIG. 3) of storage time coil information acquired by the storage time strip material information acquisition unit 110. Furthermore, the storage past material tension indicator result acquisition unit 120 calculates the storage time coil information as described above and stores it in association with the storage past material load rate result value for each of the same type of storage time coil information. As a result, the storage past material load rate result value corresponding to each of the multiple types (A to N types) of storage time coil information is stored in the load rate result value column of the all coil result storage table 310.

[0048] <Volume index acquisition unit 130> The winding style index acquiring unit 130 acquires the value of the winding style index, which is an index relating to the winding style of the strip material wound by the winding device. In this embodiment, a case where the winding style index is a telescopic amount is exemplified. The telescopic amount is the step of the end face in the sheet width direction of the coil, and the telescopic amount is the amount of this step. In this embodiment, a case where the winding style index acquiring unit 130 acquires a telescopic amount measured by a telescopic meter is exemplified.

[0049] The telescoping meter includes, for example, an optical rangefinder (e.g., a laser rangefinder). Measurement using such a telescoping meter is performed, for example, as follows. First, the rangefinder and the coil are arranged so that the rangefinder and one end face of the coil in the sheet width direction face each other with a gap therebetween. The telescoping meter then measures the distance from the rangefinder to the coil (one end face of the coil in the sheet width direction) at multiple positions along the radial direction of the coil. The telescoping meter then calculates the amount of unevenness of the one end face of the coil in the sheet width direction from the distances measured in this way. In this case, the amount of unevenness becomes the telescoping amount. The telescoping amount may be, for example, the amount of unevenness at each of the multiple positions, or a representative value (minimum, maximum, or median) of the amounts of unevenness at the multiple positions.

[0050] The telescoping meter may also include a light-emitter and a light-receiver that are installed in opposing positions with a gap longer than the diameter of the coil. Measurement using such a telescoping meter can be performed, for example, as follows: First, the light-emitter and the light-receiver are arranged at a distance from each other so that the direction of light output from the light-emitter and input to the light-receiver is parallel to the radial direction of the coil (in other words, so that the direction of light output from the light-emitter and input to the light-receiver is perpendicular to the width direction of the coil). In this case, the gap between the light-emitter and the light-receiver is made longer than the length of the coil in the width direction. Then, the coil is passed through the area between the light-emitter and the light-receiver arranged in this manner at a constant speed.

[0051] In this way, when the coil is present in the area between the transmitter and receiver, the receiver does not receive the light output from the transmitter. The telescoping meter calculates the product of the time during which the receiver does not receive the light output from the transmitter and the moving speed of the coil (the constant speed mentioned above). The value of this product is larger when there is a step on the end face of the coil in the plate width direction than when there is not. Therefore, the value of this product is the telescopic amount.

[0052] The telescoping meter itself can be realized by known technology and is not limited to these. The telescoping amount may also be measured without using a telescoping meter. For example, an operator may measure the telescoping amount using a measuring tool such as a tape measure. The telescoping amount is measured after the coil is removed from the coiler 30, but it may also be measured while the coil is attached to the coiler 30.

[0053] In this embodiment, a case will be exemplified in which the winding style index acquiring unit 130 acquires the telescoping amount and the coil identification information indicating the telescoping amount by inputting the telescoping amount to the user interface of the winding history accumulating device 100. However, the manner in which the telescoping amount is acquired is not limited to such an input operation. For example, the winding style index acquiring unit 130 may acquire the telescoping amount by receiving it from a telescoping meter or an external device. In this case, the winding style index acquiring unit 130 may acquire the telescoping amount together with the coil identification information indicating the telescoping amount, or may specify the acquired coil identification information indicating the telescoping amount based on the operation schedule described above.

[0054] The winding style index acquisition unit 130 associates the value of the telescopic amount with the coil information at the time of storage to which the same identification information as the coil identification information indicating the telescopic amount acquired as described above is added, and stores the value of the telescopic amount in the telescopic amount column of the all coil actual result storage table 310. As described above, the all coil actual result storage table 310 also stores the past material load rate actual value for storage in association with the coil information at the time of storage. Therefore, in the all coil actual result storage table 310, the coil information at the time of storage, the past material load rate actual value for storage, and the value of the telescopic amount are associated with each other and stored in the same record (row).

[0055] The winding posture index acquisition unit 130 acquires the telescopic amount as described above and stores it in association with the coil information at storage for each of the multiple types (A to N types in FIG. 3) of coil information at storage acquired by the strip information acquisition unit 110 at storage. Furthermore, the winding posture index acquisition unit 130 acquires the telescopic amount as described above and stores it in association with the coil information at storage for each of the multiple coil information at storage of the same type. As a result, the telescopic amount value corresponding to each of the multiple types (A to N types) of coil information at storage is stored in the telescopic amount column of the all coil actual result storage table 310.

[0056] <Processing Past Material Tension Index Performance Determination Unit 140, Storage Unit 150> The past material tension indicator result determination unit 140 determines the past material tension indicator result value for processing based on the past material tension indicator result value for storage and the value of the winding shape indicator for the strip-shaped material that indicates the past material tension indicator result value for storage. In this embodiment, the past material tension indicator result determination unit 140 determines the past material load rate result value for processing based on the past material load rate result value for storage and the telescopic amount that are stored in association with each other in the total coil result storage table 310. The past material load rate result value for processing is the result value of the load rate of the pinch roll motor, determined based on the past material load rate result value for storage. A specific example of processing in the past material tension indicator result determination unit 140 is described below.

[0057] First, the processing past material tension indicator result determiner 140 reads out the storage past material load rate result value and telescopic amount stored in association with the same storage time coil information from the all coil result storage table 310, and stores them in the coil-by-coil result storage table 320 (320a, 320n). In the example shown in Fig. 3, the processing past material tension indicator result determiner 140 reads out the storage past material load rate result value and telescopic amount stored in association with the storage time coil information for each of multiple types of storage time coil information A to N, and stores them together with the storage time coil information in the coil-by-coil result storage table 320 corresponding to the storage time coil information.

[0058] In Fig. 3, "coil information A" shown beside the coil-by-coil performance data storage table 320a indicates that the coil-by-coil performance data storage table 320a is a table in which type A of stored coil information and the stored past material load rate actual value and telescopic amount value that are associated with the type A of stored coil information are stored in the total coil performance data storage table 310. Similarly, "coil information N" shown beside the coil-by-coil performance data storage table 320n indicates that the coil-by-coil performance data storage table 320n is a table in which type N of stored coil information and the stored past material load rate actual value and telescopic amount that are associated with the type N of stored coil information are stored in the total coil performance data storage table 310. Note that, for convenience of illustration, the coil-by-coil performance data storage table 320 for other types of stored coil information is omitted in Fig. 3.

[0059] The processing past material tension indicator result determiner 140 then determines the processing past material load rate result value for each stored coil information based on the accumulated past material load rate result value and the telescopic amount value stored in one coil-by-coil result storage table 320 (320a, 320n). Specifically, in this embodiment, the processing past material tension indicator result determiner 140 determines the accumulated past material load rate result value stored in association with the minimum telescopic amount value stored in one coil-by-coil result storage table 320 (320a, 320n) as the processing past material load rate result value. However, this is not necessarily required. For example, the processing past material tension indicator result determiner 140 may select the minimum telescopic amount value from values ​​equal to or greater than a reference value determined in consideration of measurement error by the telescopic meter.

[0060] The processing past material tension indicator result determiner 140 may also display on a computer display information including information indicating the past material load rate result value for storage and the telescopic amount value stored in one coil-by-coil result storage table 320 (320a, 320n) and a GUI (Graphical User Interface) for selecting the past material load rate result value for storage. In this case, the operator selects a desired past material load rate result value for storage from the past material load rate result values ​​for storage displayed on the computer display. The processing past material tension indicator result determiner 140 may determine the selected past material load rate result value for storage as the processing past material load rate result value.

[0061] The processing past material tension indicator result determiner 140 stores the processing past material load rate result value determined as described above, and the accumulated coil information and telescopic amount value stored in the coil-by-coil result storage table 320 (320a, 320n) in association with the processing past material load rate result value (accumulated past material load rate result value) in the coil-by-coil processing result value storage table 330 (330a, 330n). In this embodiment, an example is shown in which the processing past material tension indicator result determiner 140 determines only one processing past material load rate result value (accumulated past material load rate result value) for accumulated coil information of the same content (same type). Therefore, as shown in FIG. 3, one coil-by-coil performance data storage table 320 (320a, 320n) stores one each of coil information at the time of accumulation, past material load rate actual value for processing (past material load rate actual value for accumulation), and telescopic amount value (i.e., the number of records (rows) in one coil-by-coil performance data storage table 320 (320a, 320n) is one).

[0062] The processing past material tension indicator result determination unit 140 determines the processing past material load rate result value as described above, and stores the processing past material load rate result value (accumulation past material load rate result value) and the accumulated coil information and telescopic amount value stored in the coil-by-coil result storage table 320 (320a, 320n) in association with the processing past material load rate result value in the coil-by-coil processing result value storage table 330 (330a, 330n) for each of the A to N types of accumulated coil information. The coil-by-coil processing result value storage table 330 (330a, 330n) is stored in, for example, the storage unit 150. The coil-by-coil result storage table 320 (320a, 320n) may be stored in the storage unit 150 or in another storage area. The same applies to the all-coil result storage table 310.

[0063] In Fig. 3, "coil information A" shown beside the coil-by-coil processing actual value storage table 330a indicates that the coil-by-coil processing actual value storage table 330a is a table that stores the processing past material load rate actual values ​​for the A type of stored coil information. Similarly, "coil information N" shown beside the coil-by-coil processing actual value storage table 330n indicates that the coil-by-coil processing actual value storage table 330a is a table that stores the processing past material load rate actual values ​​for the N type of stored coil information. Note that, for convenience of notation, the coil-by-coil processing actual value storage tables 330 for other types of stored coil information are omitted from Fig. 3.

[0064] In this manner, the past material load rate actual value for processing is determined for each of the multiple types of coil information. In this embodiment, the past material load rate actual value for processing, which indicates the relationship between the coil information and the past material load rate actual value for processing, is stored in the coil-by-coil processing actual value storage table 330 (330a, 330n). However, the form of the past material load rate actual value for processing, which indicates the relationship between the coil information and the past material load rate actual value for processing, is not limited to this form. For example, the past material load rate actual value for processing may include a relationship equation between the coil information and the past material load rate actual value for processing.

[0065] <Updated section 160> After the coil-specific processing result value storage table 330 (330a, 330n) is created as described above, the update unit 160 updates the coil-specific processing result value storage table 330 (330a, 330n).

[0066] The update unit 160 is activated, for example, when the storage past material tension indicator result acquisition unit 120 acquires the storage past material load rate result value and the winding shape index acquisition unit 130 acquires the telescopic amount value for one piece of storage time coil information newly acquired by the storage time strip material information acquisition unit 110 after the coil-by-coil processing result value storage table 330 (330a, 330n) is created. The update unit 160 determines whether the telescopic amount value for the newly acquired piece of storage time coil information is smaller than the telescopic amount value stored in the coil-by-coil processing result value storage table 330 corresponding to the storage time coil information. If the result of this determination is that the value of the telescopic amount for one newly acquired piece of storage time coil information is smaller than the value of the telescopic amount stored in the coil-by-coil processing actual value memory table 330 corresponding to the storage time coil information, the update unit 160 updates the values ​​of the storage time past material load rate actual value and telescopic amount stored in the storage time past material load rate actual value memory table 330 to the newly acquired storage time past material load rate actual value and telescopic amount values.

[0067] <Output unit 170> The output unit 170 outputs the actual value of the past material load rate for processing stored in the memory unit 150 (coil-by-coil processing actual value memory table 330 (330a, 330n)). In this embodiment, a case where the output unit 170 transmits the actual value of the past material load rate for processing to the winding control device 200 is illustrated. However, the output form of the actual value of the past material load rate for processing is not limited to this form. For example, the output unit 170 may output information indicating the actual value of the past material load rate for processing by displaying it on a computer display. Furthermore, the output unit 170 may output information indicating the actual value of the past material load rate for processing by storing it in a portable storage medium. Furthermore, the output unit 170 may transmit the actual value of the past material load rate for processing to an external device other than the winding control device 200. In other words, the output unit 170 does not have to output the actual value of the past material load rate for processing to the winding control device 200 directly.

[0068] In this embodiment, the output unit 170 outputs the past material load rate actual value for processing in response to a request from the winding control device 200. This request includes information specifying the coil information. The output unit 170 outputs the past material load rate actual value for processing stored in the coil-by-coil processing actual value storage table 330 (330a, 330n) for the coil information requested by the winding control device 200. However, the output unit 170 may output the past material load rate actual value for processing regardless of whether or not there is a request from the winding control device 200.

[0069] [Winding control device 200] FIG. 5 is a diagram showing an example of the functional configuration of the winding control device 200. The winding control device 200 controls the operation of the pinch roll 40 when the strip material is being conveyed. In this embodiment, the winding control device 200 controls the gap amount of the pinch roll 40 (between the upper roll 41 and the lower roll 42). The hardware of the winding control device 200 is realized by using, for example, an information processing device including a processor, a main memory device, an external memory device, and an input / output device, a PLC (Programmable Logic Controller), or dedicated hardware. An example of the functions of the winding control device 200 will be described below.

[0070] <Processing time strip information acquisition unit 210> The processing time strip material information acquisition unit 210 acquires strip material information (coil information), which is information about the strip material to be processed. In this embodiment, in order to distinguish it from the coil information (coil information at storage) acquired by the aforementioned storage time strip material information acquisition unit 110, the coil information acquired by the processing time strip material information acquisition unit 210 is also referred to as processing time coil information, as necessary. The processing time coil information acquired by the processing time strip material information acquisition unit 210 is information about the steel strip M to be rolled. On the other hand, the storage time coil information acquired by the storage time strip material information acquisition unit 110 is information about a previous steel strip M that was rolled before the steel strip M to be rolled. The storage time coil information and the processing time coil information differ only in this respect. In other words, the items of the processing time coil information and the storage time coil information are the same. In the example described in the section <Storage time strip material information acquisition unit 110>, the processing time coil information includes the coil width, thickness, and material of the coil, and the conveying speed of the steel strip M. Furthermore, the coil information at the time of processing is assumed to include identification information of the coil produced from the steel strip M to be rolled.

[0071] In this embodiment, the case where the processing-time strip material information acquisition unit 210 receives processing-time coil information from a higher-level computer that manages the operation of the hot rolling line is exemplified. However, the acquisition form of processing-time coil information is not limited to reception from an external device. For example, the processing-time strip material information acquisition unit 210 may acquire processing-time coil information by inputting processing-time coil information into a user interface of the winding control device 200. Furthermore, the processing-time strip material information acquisition unit 210 may acquire processing-time coil information by reading processing-time coil information stored in a portable storage medium.

[0072] <Processing Past Material Tension Index Performance Acquisition Unit 220> The past material tension indicator result acquisition unit 220 acquires a past material tension indicator result value for processing corresponding to a strip material to be processed in a processing line from past material tension indicator result values ​​for processing, which are result values ​​of tension indicators for the strip material determined based on the value of the winding shape indicator for the strip material previously wound by the winding device. As described above, this embodiment illustrates a case where the processing line is a hot rolling line and the strip material is a steel strip M. Therefore, in this embodiment, the strip material to be processed is the steel strip M to be rolled.

[0073] In this embodiment, an example is given in which the past material tension index actual value acquisition unit 220 acquires the past material load rate actual value for processing stored in the coil-by-coil processing actual value storage table 330 (330a, 330n) stored in the winding actual value accumulation device 100 (memory unit 150), which corresponds to the coil information (coil plate width, plate thickness, and material, and the conveying speed of the steel strip M) identified by the processing time coil information acquired by the processing time strip material information acquisition unit 210.

[0074] In this embodiment, a case is illustrated in which the coil information (coil information at processing) identified by the coil information at processing acquired by the strip material information acquisition unit 210 is the same as the coil information (coil information at accumulation) stored in the coil-by-coil processing actual value storage table 330. However, the coil information (coil information at processing) identified by the coil information at processing acquired by the strip material information acquisition unit 210 may be different from the coil information (coil information at accumulation) stored in the coil-by-coil processing actual value storage table 330.

[0075] For example, even if control is performed by the pinch roll control unit 240 described below using the same actual value of the past processing material load rate for steel strips M with different coil information, if knowledge has been gained from past operating results, etc. that meandering of the steel strip M can be suppressed after the rear end of the steel strip M has passed through the finishing rolling mill 10 (rolling stand F7), the past processing material tension index actual acquisition unit 220 may acquire the same actual value of the past processing material load rate for the steel strip M.

[0076] As described above, the present embodiment illustrates a case where the past processing material tension indicator result acquisition unit 220 requests the winding history accumulating device 100 to acquire the past processing material load rate result value. In this case, the past processing material tension indicator result acquisition unit 220 requests the winding history accumulating device 100 to acquire the past processing material load rate result value, including the processing time coil information acquired by the processing time strip material information acquisition unit 210, for example. As described above, the winding history accumulating device 100 (output unit 170) outputs the past processing material load rate result value stored in the per-coil processing result value storage table 330 (330a, 330n) of the coil information (processing time coil information) requested by the winding control device 200.

[0077] However, the acquisition of the past material load factor actual value for processing is not limited to this. The past material tension indicator actual value acquisition unit 220 may, for example, acquire information in advance from the coil-by-coil processing actual value storage table 330 (330a, 330n) for all coil information. In this case, the past material tension indicator actual value acquisition unit 220 may extract the past material tension indicator actual value for processing corresponding to the coil information identified by the processing-time coil information acquired by the processing-time strip information acquisition unit 210 from the previously acquired information. Furthermore, the past material tension indicator actual value acquisition unit 220 may acquire information from the updated coil-by-coil processing actual value storage table 330 each time the coil-by-coil processing actual value storage table 330 is updated.

[0078] <Treatment material tension index performance acquisition unit 230> The material tension indicator result acquisition unit 230 acquires a material tension indicator result value, which is the result of the tension indicator during the transport of the strip material to be processed. As described above, in this embodiment, the tension indicator is the pinch roll motor load factor. Therefore, in this embodiment, the material tension indicator result acquisition unit 230 acquires the pinch roll motor load factor result value at least at each time of the rear end side control period for the steel strip M to be rolled. A specific example of a method for calculating the pinch roll motor load factor result value is as described in <Accumulated Past Material Tension Indicator Results Acquisition Unit 120>, so a detailed description thereof will be omitted here. In the following description, the pinch roll motor load factor result value calculated in this manner at each time of the rear end side control period will also be referred to as the material load factor result value, as necessary. Hereinafter, the material tension indicator result acquisition unit 230 acquires the material load factor result value at the control cycle of the pinch roll 40 in the winding control device 200.

[0079] <Pinch roll control unit 240> The pinch roll control unit 240 controls the operation of the pinch rolls 40 when the strip material is being transported. As described above, this embodiment illustrates a case in which the pinch roll control unit 240 controls the gap amount of the pinch rolls 40 (between the upper roll 41 and the lower roll 42). More specifically, this embodiment illustrates a case in which the pinch roll control unit 240 executes PI control to calculate the pressing force of the pinch rolls 40 against the steel strip M such that the actual value of the pinch roll motor load factor approaches (preferably coincides with) the target value, and outputs this to the screw-down device 45 installed on the pinch rolls 40.

[0080] The pinch roll control unit 240 is not particularly limited in the method of controlling the pinch rolls 40 (between the top roll 41 and the bottom roll 42) during periods other than the rear end side control period. For example, the pinch roll control unit 240 controls the gap size of the pinch rolls 40 (between the top roll 41 and the bottom roll 42) by executing PI control using a target value set by setup calculation as the target value of the pinch roll motor load rate until the rear end of the steel strip M to be rolled passes through the HMD 20. Also, for example, when the rear end of the steel strip M to be rolled passes through the pinch rolls 40, the pinch roll control unit 240 sets the pinch rolls 40 (the top roll 41 and the bottom roll 42) to a standby position or a position set by setup calculation for the steel strip M to be rolled next. However, the method of controlling the pinch rolls 40 during periods other than the rear end side control period may be realized by a known method and is not limited to these methods.

[0081] Next, an example of a method for controlling the pinch roll 40 during the trailing edge side control period will be described. The pinch roll control unit 240 controls the operation of the pinch rolls using the actual value in the rear end side control period of the past processing material tension indicator actual value as the target value of the tension indicator. Specifically, in this embodiment, the pinch roll control unit 240 controls the operation of the pinch rolls 40 using the actual value in the rear end side control period of the past processing material load rate actual value as the target value of the pinch roll load rate. Of the past processing material load rate actual values, the actual value in the rear end side control period is, for example, in FIG. s ~t e As described above, in this embodiment, the pinch roll control unit 240 executes PI control to calculate the pressing force of the pinch roll 40 against the steel strip M such that the actual value of the pinch roll motor load factor approaches (preferably coincides with) the target value.

[0082] In order to perform such control, the pinch roll control unit 240 starts the trailing edge side control period at the start timing t sIn this embodiment, when a detection signal indicating that the rear end of the steel strip M has passed the HMD 20 is received from the HMD 20, the pinch roll control unit 240 determines whether the rear end side control period has started at the start timing t s Furthermore, the pinch roll control unit 240 determines that the end timing t e In this embodiment, when the load measured by the load cell 46 becomes less than the threshold value, the pinch roll control unit 240 determines whether the end timing t e It is determined that this has happened.

[0083] The pinch roll control unit 240 starts the trailing edge side control period (start timing t s From the end timing t e The following example illustrates a case in which the following processing is executed at each time determined by the control cycle of the pinch roll 40 in the winding control device 200 during the period from the start of winding to the end of winding.

[0084] The pinch roll control unit 240 sets the target value at the current time to the past material load rate actual value for processing (the value of the pinch roll motor load rate in FIG. 4 ) among the past material load rate actual values ​​for processing acquired by the past material tension index actual value acquisition unit 220. The pinch roll control unit 240 executes PI control to calculate the pressing force of the pinch roll 40 against the steel strip M so that the past material load rate actual value for processing at the current time acquired by the past material tension index actual value acquisition unit 230 approaches (preferably coincides with) the past material load rate actual value for processing at the current time (target value), and outputs the calculated pressing force to the screw down device 45 installed on the pinch roll 40. It should be noted that the pinch roll control unit 240 is not limited to PI control, but may instead execute PID control, or may use other control methods.

[0085] The pressure reduction device 45 converts the pressing force output from the winding control device 200 (pinch roll control unit 240) into the pressure reduction amount of the pinch roll 40 (the gap amount between the upper roll 41 and the lower roll 42) and reduces the pinch roll 40 by the pressure reduction amount of the pinch roll 40.

[0086] <Output unit 250> The output unit 250 outputs tension indicator information including information on the actual values ​​of the past processing material load rates acquired by the past processing material tension indicator result acquisition unit 220, at least for the rear end side control period, and information on the actual values ​​of the processing material load rates acquired by the processing material tension indicator result acquisition unit 230, at least for the rear end side control period. In this embodiment, a case is illustrated in which the output unit 250 displays the tension indicator information on a computer display. The past processing material load rate actual value is a target value for control of the pinch roll 40 in the pinch roll control unit 240. The processing material load rate actual value is an actual measured value for control of the pinch roll 40 in the pinch roll control unit 240.

[0087] In this embodiment, an example is given of the case where the output unit 250 outputs tension index information including the processing past material load rate actual value corresponding to the time when the processing past material load rate actual value was acquired, among the processing past material tension index actual value acquired by the processing past material load rate actual value acquisition unit 220, each time the processing material load rate actual value is acquired by the processing material tension index actual value acquisition unit 230.

[0088] Therefore, by having the output unit 250 display the tension indicator information on a computer display, the operator can determine whether the actual value of the material load rate acquired by the material tension indicator result acquisition unit 230 deviates from the actual value (target value) of the past material load rate at each time that arrives in the control cycle of the pinch roll 40 in the winding control device 200. Therefore, for example, if the deviation is large, the operator can perform an operation to adjust the gap amount of the pinch roll 40 (between the upper roll 41 and the lower roll 42). In addition, the operator can determine the difference between the target value and the actual value of the pinch roll motor load rate when the coil is manufactured, at least during the rear end control period.

[0089] The output form of the tension indicator information is not limited to displaying it on a computer display. For example, instead of or in addition to displaying it on a computer display, the output unit 250 may output the tension indicator information by transmitting it to an external device or storing it in a storage medium inside or outside the winding control device 200.

[0090] [flowchart] Next, with reference to the flowchart of FIG. 6, an example of a method for accumulating processing past material performance information will be described as an example of a winding performance accumulating method executed by the winding performance accumulating device 100. In step S601, the storage time band material information acquisition unit 110 acquires storage time coil information and stores it in the coil information field of the total coil performance record storage table 310. Next, in step S602, the accumulated past material tension indicator result acquisition unit 120 acquires effective values ​​of the operating currents of the upper pinch roll motor 43 and the lower pinch roll motor 44 at least at a plurality of times during the rear end side control period.

[0091] Next, in step S603, the storage past material tension indicator result acquisition unit 120 calculates storage past material load rate result values ​​at least at a plurality of times during the rear end side control period as storage past material load rate result values ​​for the coil indicating the storage time coil information acquired in step S601, based on the effective values ​​and rated currents of the operating currents of the upper pinch roll motor 43 and the lower pinch roll motor 44. Then, the storage past material tension indicator result acquisition unit 120 stores the storage past material load rate result values ​​in the same record (row) of the all coil result storage table 310 as the record (row) in which the storage time coil information was stored in step S601.

[0092] Next, in step S604, the winding style index acquiring unit 130 acquires the value of the telescopic amount of the coil indicating the coil information at the time of storage acquired in step S601. Then, the winding style index acquiring unit 130 stores the value of the telescopic amount in the same record (row) as the record (row) in which the coil information at the time of storage was stored in step S601, among the records (rows) in the all coil actual result storage table 310.

[0093] Next, in step S605, the winding history accumulation device 100 determines whether or not all of the information to be stored has been stored in the all-coil history storage table 310. For example, the winding history accumulation device 100 determines that all of the information to be stored in the all-coil history storage table 310 has been stored when, for example, a predetermined number or more of the coil information at the time of storage, the actual value of the past material load rate for storage, and the value of the telescopic amount have been acquired and stored in the all-coil history storage table 310 for all types of steel strips M assumed to be used as steel strips M to be rolled on a hot rolling line.

[0094] If the result of the determination in step S605 is that all the information to be stored in the all-coil result storage table 310 is not stored (NO in step S605), the process of step S601 is executed again. Then, in step S601, coil information at the time of accumulation other than the coil information at the time of accumulation stored in the all-coil result storage table 310 is acquired, and the processes of steps S602 to S605 are executed as described above.

[0095] If the result of the determination in step S605 is that all the information to be stored in the all-coil performance data storage table 310 has been stored (YES in step S605), the process of step S606 is executed. In step S606, the processing past material tension index performance determination unit 140 selects one of the accumulated coil information stored in the all-coil performance data storage table 310.

[0096] Next, in step S607, the processing past material tension index actual value determination unit 140 reads out the past material load rate actual value for storage and the telescopic amount value stored in the all coil actual value storage table 310 in association with the storage time coil information selected in step S606, and stores them together with the storage time coil information in the coil-by-coil actual value storage table 320 corresponding to the storage time coil information.

[0097] Next, in step S608, the processing past material tension indicator result determiner 140 determines the processing past material load rate result value in the accumulated coil information selected in step S606 based on the value of the telescopic amount stored in step S607 in the coil-by-coil result storage table 320. In this embodiment, the processing past material tension indicator result determiner 140 determines the accumulated past material load rate result value stored in association with the minimum value of the telescopic amount stored in the coil-by-coil result storage table 320 in step S607 as the processing past material load rate result value.

[0098] Next, in step S609, the processing past material tension indicator actual value determination unit 140 stores the accumulated coil information selected in step S606, the processing past material load rate actual value determined in step S608, and the value of the telescopic amount stored in the coil-by-coil actual value memory table 320 in association with the accumulated coil information and the processing past material load rate actual value (accumulated past material load rate actual value) in the processing past material actual value memory table 330 corresponding to the accumulated coil information.

[0099] Next, in step S610, the processing past material tension indicator result determination unit 140 determines whether or not the processing of steps S606 to S609 has been performed for all types of at-storage coil information stored in the all-coil result storage table 310. If the result of the determination in step S610 is that the processing of steps S606 to S609 has not been performed for all types of at-storage coil information (NO in step S610), the processing of step S606 is performed again. Then, in step S606, at-storage coil information other than the at-storage coil information selected in step S606 so far is selected, and the processing of steps S607 to S609 is performed as described above. Then, if the result of the determination in step S610 is that the processing of steps S606 to S609 has been performed for all types of at-storage coil information (YES in step S610), the processing according to the flowchart in FIG. 6 ends.

[0100] Next, an example of a method for updating processing past material performance information will be described with reference to the flowchart of Fig. 7 as an example of a winding performance accumulation method executed by the winding performance accumulation device 100. The flowchart of Fig. 7 starts after the processing according to the flowchart of Fig. 6 is completed. In addition, the flowchart of Fig. 7 is executed, for example, every time rolling of a steel strip M is performed in a hot rolling line after the processing according to the flowchart of Fig. 6 is completed.

[0101] In step S701, the storage time band material information acquisition unit 110 acquires storage time coil information. Next, in step S702, the storage past material tension indicator result acquisition unit 120 acquires, as effective values ​​of the operating currents of the upper pinch roll motor 43 and the lower pinch roll motor 44, actual values ​​at least at a plurality of times during the rear end side control period.

[0102] Next, in step S703, the past material tension indicator actual value acquisition unit 120 calculates the past material load rate actual value for storage at least at multiple times during the rear end control period as the past material load rate actual value for storage for the coil indicating the storage time coil information acquired in step S701 based on the effective value and rated current of the operating current of the upper pinch roll motor 43 and the lower pinch roll motor 44.

[0103] Next, in step S704, the winding style index acquisition unit 130 acquires the value of the telescopic amount of the coil indicating the coil information at the time of storage acquired in step S701. Next, in step S705, the update unit 160 determines whether the value of the telescopic amount acquired in step S704 is smaller than the value of the telescopic amount stored in the coil-by-coil processing actual value storage table 330 corresponding to the coil information at the time of accumulation acquired in step S701. If the result of the determination in step S705 is that the value of the telescopic amount acquired in step S704 is not smaller than the value of the telescopic amount stored in the coil-by-coil processing actual value storage table 330 corresponding to the coil information at the time of accumulation acquired in step S701 (NO in step S705), the coil-by-coil processing actual value storage table 330 is not updated. Therefore, the processing according to the flowchart in FIG. 7 ends.

[0104] On the other hand, if the result of the judgment in step S705 is that the value of the telescopic amount acquired in step S704 is smaller than the value of the telescopic amount stored in the coil-by-coil processing actual value storage table 330 corresponding to the coil information at the time of accumulation acquired in step S701 (YES in step S705), the processing of step S706 is executed.

[0105] In step S706, the update unit 160 updates the processing past material load rate actual value stored in the coil-by-coil processing actual value storage table 330 corresponding to the storage time coil information acquired in step S701 as the storage time past material load rate actual value acquired in step S703. In addition, the update unit 160 updates the processing past material load rate actual value stored in the coil-by-coil processing actual value storage table 330 corresponding to the storage time coil information acquired in step S701 to the telescopic amount value acquired in step S704. When the processing of step S706 ends, the processing according to the flowchart in FIG. 7 ends.

[0106] Next, an example of a winding control method performed by the winding control device 200 will be described with reference to the flowchart of FIG. In step S801, the processing time strip information acquisition unit 210 acquires processing time coil information. Next, in step S802, the processing past material tension indicator actual value acquisition unit 220 acquires the processing past material load rate actual value stored in the coil-by-coil processing actual value memory table 330 corresponding to the processing time coil information acquired in step S801.

[0107] Next, in step S803, the pinch roll control unit 240 determines whether or not the rear end of the steel strip M to be rolled has passed the HMD 20. If the result of the determination in step S803 is that the rear end of the steel strip M to be rolled has not passed the HMD 20 (NO in step S803), the processing of step S804 is executed. In step S804, the pinch roll control unit 240 executes control (steady-state pinch roll control) until the rear end of the steel strip M to be rolled has passed the HMD 20. Then, the processing of step S803 is executed again.

[0108] If the result of the determination in step S803 is that the rear end of the steel strip M to be rolled has passed the HMD 20 (YES in step S803), the processing of step S805 is executed. In step S805, the treatment material tension index result acquisition unit 230 acquires the effective values ​​at the current time as the effective values ​​of the operating currents of the upper pinch roll motor 43 and the lower pinch roll motor 44. Next, in step S806, the treatment material tension index actual value acquisition unit 230 calculates the treatment material load rate actual value at the current time based on the effective value of the operating current of the upper pinch roll motor 43 and the lower pinch roll motor 44 acquired in step S805 and the rated current of the upper pinch roll motor 43 and the lower pinch roll motor 44.

[0109] Next, in step S807, the pinch roll control unit 240 performs PI control using the actual processing past material load rate value corresponding to the current time as the target value from among the actual processing past material load rate values ​​obtained in step S802, and calculates the pressing force of the pinch roll 40 on the steel strip M so that the actual processing material load rate value at the current time calculated in step S806 approaches (preferably coincides with) the target value, and outputs the calculated pressing force to the reduction device 45.

[0110] Next, in step S808, the output unit 250 displays tension index information on the computer display, including information on the past processing material load rate actual value corresponding to the current time from the past processing material load rate actual values ​​acquired in step S802, and the processing material load rate actual value at the current time calculated in step S806.

[0111] Next, in step S809, the pinch roll control unit 240 determines whether or not the rear end of the steel strip M to be rolled has passed through the pinch rolls 40. If the result of the determination in step S809 is that the rear end of the steel strip M to be rolled has not passed through the pinch rolls 40 (NO in step S808), the processing of step S805 is executed. Then, the processing of steps S805 to S809 is executed again in the next control cycle.

[0112] If the result of the determination in step S809 is that the rear end of the steel strip M to be rolled has passed the pinch rolls 40 (YES in step S809), the processing of step S810 is executed. In step S810, the pinch roll control unit 240 executes control (finishing pinch roll control) after the rear end of the steel strip M to be rolled has passed the pinch rolls 40. When the processing of step S810 is completed, the processing according to the flowchart of FIG. 8 is terminated.

[0113] [summary] As described above, in this embodiment, the winding control device 200 acquires a processing past material tension index actual value, which is an actual value of the tension index for the steel strip M determined based on the value of the telescopic amount for the steel strip M previously wound by the coiler 30, and uses the acquired processing past material tension index actual value to control the operation of the pinch rolls 40 during a rear end control period that includes the period from the timing when the steel strip M is released from constraint by the finishing rolling mill 10 (rolling stand F7) until it passes through the pinch rolls 40. Therefore, even without using large-scale equipment such as a looper for tension detection downstream of the finishing rolling mill 10 (the entry side of the pinch rolls 40), control can be performed based on past performance to suppress meandering of the steel strip M after it is released from constraint by the finishing rolling mill 10 (rolling stand F7). Therefore, it is possible to suppress meandering of the steel strip M after it is released from the constraint of the finishing rolling mill 10 (rolling stand F7) and suppress disturbance of the winding shape of the steel strip M after winding without using large-scale equipment.

[0114] Furthermore, in this embodiment, the period starting from the timing when a predetermined region (e.g., the tail end) of the steel strip M passes a predetermined position (e.g., HMD 20) on the conveying path R is defined as the rear end side control period, and this predetermined position is defined as a common position for multiple steel strips M. Therefore, the length of the steel strip M to which the control of the operation of the pinch roll 40 is applied during the rear end side control period can be set to the same length for multiple steel strips M. Therefore, there is no need to change the content of the control of the operation of the pinch roll 40 during the rear end side control period for each length of multiple steel strips M.

[0115] In this embodiment, the past processing material tension indicator result value is time-series data for a period including the rear end side control period, so that the operation of the pinch roll 40 can be controlled more accurately using the past processing material tension indicator result value.

[0116] Furthermore, in this embodiment, the winding control device 200 acquires the processing past material tension index actual value corresponding to the coil information of the steel strip M to be processed from the memory unit 150, which stores processing past material actual information indicating the relationship between coil information, which is information about the steel strip M, and the processing past material tension index actual value of the steel strip M. Therefore, the operation of the pinch roll 40 during the rear end side control period can be controlled using the processing past material tension index actual value tailored to the steel strip M to be processed. Therefore, even if there are multiple types of steel strips M to be processed, the operation of the pinch roll 40 can be controlled with high precision.

[0117] Furthermore, in this embodiment, the winding control device 200 acquires a processing material tension index actual value, which is the actual value of the tension index of the steel strip M being transported on the transport path R, and controls the operation of the pinch roll 40 during the rear end side control period based on the processing material tension index actual value and the processing past material tension index actual value. Therefore, the operation of the pinch roll 40 can be controlled so that the processing material tension index actual value approaches (preferably coincides with) the processing past material tension index actual value. Therefore, the operation of the pinch roll 40 can be controlled with higher precision.

[0118] In this embodiment, the tension index is the load factor determined by the ratio of the operating current to the rated current of the motors (upper pinch roll motor 43 and lower pinch roll motor 44) that drive the pinch rolls 40. Therefore, the physical quantities that affect the tension of the steel strip M between the pinch rolls 40 and the finishing mill 10 can be obtained using existing equipment.

[0119] Furthermore, in this embodiment, the period from the time when the rear end of the steel strip M to be rolled passes a predetermined position within the finishing rolling mill 10 (for example, the installation position in the conveying direction of the rolling stand F1 or F2 (the direction along the conveying path R (y-axis direction))) or a predetermined position on the conveying path R upstream of the finishing rolling mill 10 (for example, the installation position in the conveying direction of the HMD20) is defined as the rear end side control period, and this predetermined position is defined as a common position for multiple steel strips M. Therefore, it is possible to use existing equipment to make the length of the steel strip M to which control of the operation of the pinch rolls 40 of the rolling line is applied during the rear end side control period the same length for multiple steel strips M.

[0120] Furthermore, in this embodiment, the winding history accumulating device 100 acquires a past material tension index actual value for accumulation, which is the actual value of the tension index in the steel strip M, and the value of the winding shape index in the steel strip M that indicates the past material tension index actual value for accumulation, and determines a past material tension index actual value for processing based on these, and stores past material history information for processing that indicates the relationship between the determined past material tension index actual value for processing and the coil information of the steel strip M that corresponds to the past material tension index actual value for processing. Therefore, past material history information for processing corresponding to the steel strip M can be acquired.

[0121] Furthermore, in this embodiment, the winding history accumulation device 100 stores processing past material history information for each of a plurality of different types of steel strips M. Therefore, even if there are a plurality of types of steel strips M, processing past material history information suitable for each steel strip M can be obtained.

[0122] [Variations] <Variation 1> In this embodiment, the tension index is a physical quantity that affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40, and the physical quantity is the pinch roll motor load factor. However, the physical quantity that affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40 is not limited to the pinch roll motor load factor. For example, it may be the load measured by the load cell 46 (the load that the pinch rolls 40 apply to the steel strip M). The larger the load measured by the load cell 46, the greater the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40.

[0123] <Variation 2> In this embodiment, the tension indicator is a physical quantity that affects the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40. However, the tension indicator may also be the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40. In the following description, the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40 will be referred to as pinch roll tension as necessary. The actual value of the pinch roll tension may be a measured value or a calculated value. The calculation of the pinch roll tension is performed, for example, as follows. First, the operating currents of the upper pinch roll motor 43 and the lower pinch roll motor 44 are converted into torque to calculate the torque of the upper pinch roll motor 43 and the lower pinch roll motor 44. Then, the arithmetic mean value of the torque of the upper pinch roll motor 43 divided by the radius of the upper roll 41 and the torque of the lower pinch roll motor 44 divided by the radius of the lower roll 42 is calculated as the actual value (calculated value) of the pinch roll tension. When the actual value of the pinch roll tension is used as the measured value, a tension meter is installed between the finishing mill 10 and the pinch roll 40. Figure 9 is a diagram showing an example of the relationship between pinch roll tension and time. Figure 9 is a diagram corresponding to Figure 4.

[0124] When the pinch roll tension is used instead of the pinch roll load factor in this way, the pinch roll load factor can be replaced with the pinch roll tension in the description of this embodiment. Therefore, a detailed description of the case where the pinch roll tension is used will be omitted here. By using the pinch roll tension as the tension index, the tension of the steel strip M being transported on the transport path R between the finishing rolling mill 10 and the pinch rolls 40 can be directly evaluated. Furthermore, by using the actual value of the pinch roll tension as a calculated value, the actual value of the pinch roll tension can be obtained using existing equipment without using a tension meter.

[0125] <Variation 3> As described above, the number of pinch rolls 40 installed between the finishing rolling mill 10 and the coiler 30 is not limited to one, and may be multiple. In this case, for example, the winding history accumulating device 100 includes a storage time strip material information acquiring unit 110, a storage past material tension index history acquiring unit 120, a winding shape index acquiring unit 130, a processing past material tension index history determining unit 140, a memory unit 150, an update unit 160, and an output unit 170, individually for each pinch roll 40, and creates and stores a coil-by-coil processing history value memory table 330 (330a, 330n) for each pinch roll 40. Furthermore, for example, the winding control device 200 is provided with a strip material information acquisition unit 210 at the time of processing, a past material tension indicator performance acquisition unit 220 for processing, a material tension indicator performance acquisition unit 230, a pinch roll control unit 240, and an output unit 250, each for each pinch roll 40, and controls the operation of each pinch roll 40 individually.

[0126] <Variation 4> In this embodiment, the operation of the pinch rolls 40 in a hot rolling line is controlled, and the restraining device is a finishing rolling mill 10. However, the pinch rolls to be controlled are not limited to the pinch rolls 40 in the hot rolling line. For example, the operation of pinch rolls installed between a cold rolling mill and a coiler in a cold rolling line may be controlled. In this case, the restraining device is the cold rolling mill. Furthermore, the operation of pinch rolls installed between a bridle roll and a coiler in a continuous processing line such as a continuous annealing line may be controlled. In this case, the bridle roll is the restraining device. Furthermore, in this case, a shear that cuts the steel strip in the width direction is disposed between the restraining device and the pinch rolls. In this case, the timing when the steel strip is cut by the shear corresponds to the timing when the strip is released from the restraint by the restraining device.

[0127] <Variation 5> In the present embodiment, the winding history accumulating device 100 and the winding control device 200 are separate devices, but the winding history accumulating device 100 and the winding control device 200 may be implemented as a single device.

[0128] <Other variations> The above-described embodiments of the present invention can be realized by a computer executing a program. A computer-readable recording medium on which the program is recorded and a computer program product such as the program can also be applied as embodiments of the present invention. Examples of recording media that can be used include flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, magnetic tapes, non-volatile memory cards, and ROMs. The embodiments of the present invention can also be realized by a programmable logic controller (PLC) or dedicated hardware such as an application-specific integrated circuit (ASIC). Furthermore, the above-described embodiments of the present invention are merely examples of specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be construed as being limited by these. In other words, the present invention can be embodied in various forms without departing from its technical concept or main features. [Explanation of symbols]

[0129] 10 Finishing rolling mill 11a~11g Reduction device 12a~12g load cell 20 HMD 30 Coiler 31 Mandrel 40 pinch rolls 41 Upper Roll 42 Lower roll 43 Upper pinch roll motor 44 Lower pinch roll motor 45 Screw down device 46 load cells 100 Winding record storage device 110 Storage time strip material information acquisition unit 120 Past material tension index performance acquisition unit for storage 130 Volume index acquisition part 140 Past material load rate determination section for processing 150 Storage section 160 Update Department 170 Output section 200 Winding control device 210 Processing time strip material information acquisition unit 220 Past material capacity index performance acquisition unit for processing 230 Processing Material Tension Index Performance Acquisition Department 240 Pinch roll control section 250 Output section M steel strip R transport path

Claims

1. A winding control device that controls the operation of a pinch roll installed between a restraining device that restrains and transports a strip material and a winding device that winds up the strip material that has passed through the restraining device, a processing past material tension indicator result acquisition unit that acquires, from among processing past material tension indicator result values ​​that satisfy predetermined conditions among processing past material tension indicator result values, which are result values ​​of tension indicators for strip material previously wound by the winding device, a processing past material tension indicator result value that corresponds to the smallest value of the winding shape index, which is an index related to the winding shape of the strip material, as a processing past material tension indicator result value corresponding to the strip material to be processed in a processing line that includes the restraining device, the winding device, and the pinch roll; a pinch roll control unit that controls the operation of the pinch roll when the strip material to be processed is being transported on the transport path; Equipped with the tension indicator is a physical quantity that affects the tension of the strip material between the restraining device and the pinch roll, or the tension of the strip material between the pinch roll and the restraining device, The pinch roll control unit uses the actual value of the processing past material tension index acquired by the processing past material tension index actual value acquisition unit as a target value of the tension index, and controls the operation of the pinch roll during a rear end control period that includes the period from the time the strip material to be processed is released from restraint by the restraint device to the time it passes through the pinch roll.

2. the trailing edge side control period starts from a timing when the trailing edge of the strip material to be processed being conveyed on the conveying path passes a detection position of the trailing edge on the conveying path in a predetermined facility capable of detecting the passage of the trailing edge, The winding control device according to claim 1 , wherein the detection position is a common position for a plurality of the strip materials to be processed in the processing line.

3. The winding control device according to claim 1 or 2, wherein the past material processing tension indicator actual value is time-series data for a period including the rear end side control period.

4. The winding control device described in any one of claims 1 to 3, wherein the processing past material tension indicator actual value acquisition unit acquires the processing past material tension indicator actual value corresponding to the processing past material tension indicator information of the strip material to be processed from a memory unit that stores processing past material actual information that indicates the relationship between strip material information, which is information about the strip material wound by the winding device, and the processing past material tension indicator actual value for the strip material.

5. The winding control device according to claim 4 , wherein the strip information includes values ​​of the material, width, thickness, and transport speed of the strip wound by the winding device.

6. a material tension indicator result acquisition unit that acquires a material tension indicator result value, which is an actual value of a tension indicator of the strip material to be treated being transported on the transport path; The winding control device according to any one of claims 1 to 5, wherein the pinch roll control unit controls the operation of the pinch roll during the rear end side control period based on the past processing material tension indicator actual value acquired by the past processing material tension indicator actual value acquisition unit and the processing material tension indicator actual value acquired by the processing material tension indicator actual value acquisition unit.

7. 7. The winding control device according to claim 1, wherein the tension index is a load factor determined by a ratio of an operating current to a rated current of a motor that drives the pinch roll.

8. the tension indicator is the tension of the strip between the pinch roll and the restraining device; The winding control device according to any one of claims 1 to 6, wherein the tension of the strip material between the pinch roll and the restraining device is calculated based on an operating current of a motor that drives the pinch roll.

9. The winding control device according to any one of claims 1 to 8, wherein the restraining device includes a rolling mill that rolls the strip material.

10. the rear end side control period is a period starting from a timing when the rear end of the strip material to be processed being transported on the transport path passes a detection position of the rear end on the transport path in the rolling mill, or a detection position of the rear end on the transport path in a predetermined facility upstream of the rolling mill, The winding control device according to claim 9 , wherein the detection position is a common position for a plurality of strip-shaped materials to be processed in the processing line.

11. A winding record accumulation device that calculates and stores the processing past material tension indicator record value acquired by the winding control device according to any one of claims 1 to 10, a past material tension indicator result acquisition unit for acquiring a past material tension indicator result value for storage, which is an actual value of the tension indicator in the strip material; a winding shape index acquiring unit that acquires the value of the winding shape index for the strip material that indicates the accumulated past material tension index actual value; a past material tension indicator result determination unit for determining, as the past material tension indicator result value for processing, the actual value of the past material tension indicator for storage that is a value corresponding to the smallest value of the winding shape index from among the past material tension indicator result values ​​for storage that satisfy a predetermined condition, based on the past material tension indicator result value for storage acquired by the past material tension indicator result acquisition unit and the value of the winding shape index of the strip-shaped material that indicates the past material tension indicator result value for storage; A memory unit that stores past processing material performance information that indicates the relationship between the past processing material tension indicator performance value determined by the past processing material tension indicator performance determination unit and strip material information that is information about the strip material that indicates the past processing material tension indicator performance value; A winding history accumulation device comprising:

12. The winding history accumulation device according to claim 11, wherein the storage unit stores the past material processing history information for each of a plurality of different types of the strip-shaped materials.

13. A winding control method for controlling the operation of a pinch roll installed between a restraining device that restrains and transports a strip material and a winding device that winds up the strip material that has passed through the restraining device, comprising: a processing line including the restraining device, the winding device, and the pinch roll, and a processing line including ... a pinch roll control step of controlling the operation of the pinch roll when the strip material to be processed is being transported on the transport path; Equipped with the tension indicator is a physical quantity that affects the tension of the strip material between the restraining device and the pinch roll, or the tension of the strip material between the pinch roll and the restraining device, The pinch roll control process uses the actual value of the processing past material tension index acquired by the processing past material tension index actual value acquisition process as a target value of the tension index, and controls the operation of the pinch roll during a rear end control period that includes the period from the time the strip material to be processed is released from restraint by the restraining device to the time it passes through the pinch roll.This is a winding control method.

14. A winding record accumulation method for determining and storing the processing past material tension indicator record value acquired by the winding control method according to claim 13, a step of acquiring a past material tension indicator result for storage, which is an actual value of the tension indicator in the strip material; a winding shape indicator acquisition step of acquiring a value of the winding shape indicator for the strip material indicating the accumulated past material tension indicator actual value; a past material tension indicator result determination step of determining, as the past material tension indicator result value for processing, the past material tension indicator result value for storage that is a value corresponding to the smallest value of the winding shape index from among the past material tension indicator result values ​​for storage that satisfy a predetermined condition, based on the past material tension indicator result value for storage acquired in the past material tension indicator result acquisition step and the value of the winding shape index of the strip-shaped material that indicates the past material tension indicator result value for storage; a storage step for storing past material processing performance information indicating the relationship between the past material processing tension indicator performance value determined by the past material processing tension indicator performance determination step and strip material information, which is information about the strip material indicating the past material processing tension indicator performance value; A winding performance accumulation method comprising:

15. A program for causing a computer to function as each unit of the winding control device according to any one of claims 1 to 10.

16. A program for causing a computer to function as each unit of the winding history accumulating device according to claim 11 or 12.

Images