WO2020261444A1 - Dispositif de régulation de température pour train de laminoirs à chaud - Google Patents

Dispositif de régulation de température pour train de laminoirs à chaud Download PDF

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Publication number
WO2020261444A1
WO2020261444A1 PCT/JP2019/025458 JP2019025458W WO2020261444A1 WO 2020261444 A1 WO2020261444 A1 WO 2020261444A1 JP 2019025458 W JP2019025458 W JP 2019025458W WO 2020261444 A1 WO2020261444 A1 WO 2020261444A1
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Prior art keywords
cooling device
rot
temperature
rolled material
value
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Application number
PCT/JP2019/025458
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English (en)
Japanese (ja)
Inventor
鈴木　敦
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東芝三菱電機産業システム株式会社
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Application filed by 東芝三菱電機産業システム株式会社 filed Critical 東芝三菱電機産業システム株式会社
Priority to JP2020534629A priority Critical patent/JP6954476B2/ja
Priority to CN201980006321.3A priority patent/CN112437702B/zh
Priority to PCT/JP2019/025458 priority patent/WO2020261444A1/fr
Publication of WO2020261444A1 publication Critical patent/WO2020261444A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
    • B21B37/76—Cooling control on the run-out table
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning

Definitions

  • the present invention relates to a temperature control device for a hot rolling line.
  • Patent Document 1 discloses a temperature control device for a hot rolling line. According to the temperature control device, the accuracy of the temperature model in the ROT cooling device of the hot rolling line can be improved.
  • the temperature control device described in Patent Document 1 does not control a hot rolling line in which a ROT cooling device and an acceleration cooling device are provided. Therefore, if a hot rolling line in which a ROT cooling device and an accelerated cooling device are provided is simply applied to the temperature control device, the accuracy of the temperature model cannot be improved.
  • An object of the present invention is to provide a temperature control device for a hot rolling line capable of improving the accuracy of a temperature model at a hot rolling line temperature in which a ROT cooling device and an accelerated cooling device are provided.
  • the temperature control device for the hot rolling line is a unit for water cooling in a temperature model that predicts the temperature of the rolled material with respect to the ROT cooling device that injects water into the rolled material in the downstream process of the hot rolling line.
  • the ROT side calculation unit that calculates the predicted value of the temperature of the rolled material using the ROT side water-cooled heat transfer coefficient that represents the amount of heat removed per area, and the upstream side of the ROT cooling device in the downstream process of the hot rolling line.
  • the amount of heat removed per unit area in water cooling is determined.
  • An acceleration side calculation unit that calculates a predicted value of the temperature of the rolled material using a value set separately from the ROT side water cooling heat transfer coefficient set by the ROT side calculation unit as the acceleration side water-cooled heat transfer coefficient. Equipped with.
  • the temperature control device sets the ROT side water-cooled heat transfer coefficient and the acceleration side water-cooled heat transfer coefficient separately. Therefore, the accuracy of the temperature model can be improved in the hot rolling line in which the ROT cooling device and the acceleration cooling device are installed side by side.
  • FIG. 5 is a block diagram of a main part of a hot rolling line to which a temperature control device for the hot rolling line according to the first embodiment is applied. It is a perspective view of the cut plate to which the temperature control device of the hot rolling line according to Embodiment 1 is applied. It is a figure which shows the predicted value and the actual value (re-predicted value) of the temperature change of each cut plate in the acceleration cooling device to which the temperature control device of the hot rolling line in Embodiment 1 is applied. It is a figure which shows the predicted value and the actual value (re-predicted value) of the temperature change of each cut plate in the ROT cooling device to which the temperature control device of the hot rolling line according to Embodiment 1 is applied.
  • FIG. 1 It is a figure which shows the flow of error learning of the temperature model in the acceleration cooling device to which the temperature control device of the hot rolling line in Embodiment 1 is applied. It is a figure which shows the flow of the error learning of the temperature model in the ROT cooling device to which the temperature control device of the hot rolling line in Embodiment 1 is applied. It is a hardware block diagram of the temperature control apparatus of the hot rolling line in Embodiment 1. FIG. It is a figure which shows the predicted value and the actual value (re-predicted value) of the temperature change of each cutting plate in the ROT cooling device to which the temperature control device of the hot rolling line in Embodiment 2 is applied.
  • FIG. 1 is a block diagram of a main part of a hot rolling line to which the temperature control device for the hot rolling line according to the first embodiment is applied.
  • the finishing rolling mill 1 is provided on the downstream side of a rough rolling mill (not shown).
  • the acceleration cooling device 2 is provided on the downstream side of the finish rolling mill 1.
  • the ROT cooling device 3 is provided on the downstream side of the acceleration cooling device 2.
  • the take-up coiler 4 is provided on the downstream side of the ROT cooling device 3.
  • the acceleration cooling device 2 is divided into a plurality of banks 2a by the cooling water supply system, and the plurality of banks 2a are arranged in the length direction of the hot rolling line.
  • Each of the plurality of banks 2a includes a plurality of water injection valves 2b.
  • the plurality of water injection valves 2b are arranged in the length direction of the hot rolling rolling line.
  • a plurality of nozzles 2c are provided for the plurality of water injection valves 2b.
  • the plurality of nozzles 2c are arranged in the width direction of the hot rolling line.
  • the ROT cooling device 3 is composed of a water injection device and a transfer table.
  • the water injection device is provided at a position higher than that of the acceleration cooling device 2.
  • the water injection device is divided into a plurality of banks 3a in the cooling water supply system.
  • the plurality of banks 3a are arranged in the length direction of the hot rolling line.
  • Each of the plurality of banks 3a includes a plurality of water injection valves 3b.
  • the plurality of water injection valves 3b are arranged in the length direction of the hot rolling line.
  • a plurality of nozzles 3c are provided for the plurality of water injection valves 3b.
  • the plurality of nozzles 3c are arranged in the width direction of the hot rolling line.
  • the finish rolling mill outlet side thermometer 5 is provided between the finish rolling mill 1 and the acceleration cooling device 2.
  • the intermediate thermometer 6 is provided between the acceleration cooling device 2 and the ROT cooling device 3.
  • the take-up thermometer 7 is provided between the ROT cooling device 3 and the take-up coiler 4.
  • the finish rolling mill 1 finish rolls the rolled material 8.
  • the finish rolling mill outlet side thermometer 5 measures the initial temperature of the total length of the rolled material 8 as the actual FDT value before cooling.
  • the acceleration cooling device 2 accelerates and cools the rolled material 8 by driving a pump (not shown) with an inverter (not shown) and injecting water at a high pressure. In accelerated cooling, the cooling rate of the rolled material 8 is faster than that of normal water cooling. As a result, the crystal structure of the rolled material 8 is adjusted, so that the mechanical properties of the rolled material 8 change.
  • the intermediate thermometer 6 measures the initial temperature of the entire length of the rolled material 8 as the actual MT value.
  • the ROT cooling device 3 cools the rolled material 8 by injecting water at a constant pressure.
  • the take-up thermometer 7 measures the initial temperature of the entire length of the rolled material 8 as a CT actual value.
  • the take-up coiler 4 winds up the rolled material 8.
  • the temperature control device 9 includes an acceleration side calculation unit 9a, a ROT side calculation unit 9b, and a control unit 9c.
  • the acceleration side calculation unit 9a predicts in advance the temperature of the rolled material 8 on the entrance / exit side of each bank 2a of the acceleration cooling device 2 using the temperature model.
  • the ROT side calculation unit 9b predicts in advance the temperature of the rolled material 8 on the inlet / outlet side of each bank 3a of the ROT cooling device 3 using the temperature model.
  • the control unit 9c controls the opening and closing of each water injection valve 2b of the acceleration cooling device 2 based on the prediction result by the acceleration side calculation unit 9a.
  • the control unit 9c controls the opening and closing of each water injection valve 3b of the ROT cooling device 3 based on the prediction result by the ROT side calculation unit 9b.
  • the acceleration side calculation unit 9a accelerates based on the FDT actual value from the finish rolling mill output side thermometer 5 and the MT actual value from the intermediate thermometer 6.
  • the ROT side calculation unit 9b learns the temperature model in the ROT cooling device 3 based on the MT actual value from the intermediate thermometer 6 and the CT actual value from the take-up thermometer 7.
  • the temperature control device 9 starts from the FDT actual value of each cutting plate, and each bank of the accelerated cooling device 2 of each cutting plate so that the final CT predicted value reaches the CT target value.
  • the temperature prediction calculation of the inlet / outlet side of each bank 3a of 2a and the ROT cooling device 3 is performed.
  • the temperature control device 9 has a reference value (V 1 acc , C 2 acc , ... C n acc ) of the amount of cooling water to each bank 2a of the accelerated cooling device 2 and the amount of cooling water to each bank 3a of the ROT cooling device 3. (V 1 rot , C 2 rot , ... C n rot ) is determined.
  • each bank 2a the number of water injection valves 2b to be opened is determined based on the reference value.
  • the number of water injection valves 3b to be opened is determined based on the reference value.
  • the temperature control device 9 learns the temperature model in the acceleration cooling device 2 so that the error due to the position of the intermediate thermometer 6 becomes zero.
  • the temperature control device 9 learns the temperature model in the ROT cooling device 3 so that the error due to the position of the take-up thermometer 7 becomes zero.
  • the MT actual value is used as the initial value for the initial temperature in the temperature prediction of each cutting plate.
  • FIG. 2 is a perspective view of a cutting plate to which the temperature control device for the hot rolling line according to the first embodiment is applied.
  • the heat inflow and outflow is calculated after the rolled material 8 is divided into cutting plates 8a having a constant length.
  • the constant length is set between 3 m and 5 m.
  • h w is a water-cooled heat transfer coefficient (W / mm 2 / ° C.). h w is different between the acceleration cooling device 2 and the ROT cooling device 3.
  • a w is the area (mm 2 ) of the upper and lower surfaces of the cutting plate 8a in contact with the cooling water.
  • a w changes with the number of water injection valves opened in each bank.
  • T w is the temperature (° C.) of the cooling water.
  • T surf is the surface temperature (° C.) of the cutting plate 8a.
  • T is the temperature (° C.) of the cutting plate 8a.
  • ⁇ is the density of the cutting plate 8a (kg / mm 3 ).
  • C P is the specific heat of Setsuban 8a (J / kg / °C) .
  • l is the length (mm) of the cutting plate 8a in the traveling direction.
  • B is the width (mm) of the cutting plate 8a.
  • H is the plate thickness (mm) of the cutting plate 8a.
  • t is the time (s). i is the number of the cutting plate 8a.
  • FIG. 3 is a diagram showing a predicted value and an actual value (re-predicted value) of a temperature change of each cutting plate inside the acceleration cooling device to which the temperature control device of the hot rolling line according to the first embodiment is applied.
  • FIG. 4 is a diagram showing predicted values and actual values (repredicted values) of temperature changes of each cutting plate inside the ROT cooling device to which the temperature control device for the hot rolling line according to the first embodiment is applied.
  • FIG. 5 is a diagram showing a flow of error learning of a temperature model in an accelerated cooling device to which the temperature control device for the hot rolling line according to the first embodiment is applied.
  • FIG. 6 is a diagram showing a flow of error learning of a temperature model in a ROT cooling device to which a temperature control device for a hot rolling line according to the first embodiment is applied.
  • Z 1 acc and Z 2 acc which are learning values of the water-cooled heat transfer coefficient h w acc of the acceleration cooling device 2, are automatically adjusted.
  • v a acc (m / s ) is the average speed of each Setsuban 8a inside the accelerated cooling device 2.
  • v 0 (m / s) is the reference speed of each cutting plate 8a inside the acceleration cooling device 2.
  • f w acc is a model prediction function.
  • Z 1 acc is a multiplication type learning value for the predicted value of the temperature model.
  • Z 2 acc is a power-type learning value for the velocity ratio.
  • the cooling phenomenon in the rolled material 8 differs between when the rolled material 8 moves at high speed and when the rolled material 8 is stationary. Therefore, as shown in Eq. (3), the influence of speed is adjusted by the learning term.
  • Z 2 acc is obtained so that the error of the MT predicted value becomes 0 by using the data of the specific cutting plate 8a of the Middle portion which is the portion of the rolled material 8 during or after acceleration. At this time, the value obtained in the Head portion is used for Z 1 acc .
  • Z 1 rot and Z 2 rot which are learning values of the water-cooled heat transfer coefficient h w rot of the ROT cooling device 3, are automatically adjusted.
  • v a rot (m / s ) is the average speed of each Setsuban 8a inside the ROT cooling device 3.
  • v 0 (m / s) is the reference speed of each cutting plate 8a inside the ROT cooling device 3.
  • f w rot is a model prediction function.
  • Z 1 rot is a learning value of a multiplication type with respect to the predicted value of the temperature model.
  • Z 2 rot is a power-type learning value for the velocity ratio.
  • the cooling phenomenon in the rolled material 8 differs between when the rolled material 8 moves at high speed and when the rolled material 8 is stationary. Therefore, as shown in Eq. (4), the influence of speed is adjusted by the learning term.
  • the Z 2 rotor is obtained so that the error of the CT predicted value becomes 0. At this time, the value obtained in the head section is used for Z 1 rot .
  • the temperature control device 9 sets the water-cooled heat transfer coefficient separately in the acceleration cooling device 2 and the ROT cooling device 3. Therefore, the accuracy of the temperature model can be improved.
  • the temperature control device 9 corrects the predicted value of the temperature of the rolled material 8 based on the difference between the predicted value of the cooled temperature of the rolled material 8 predicted by the temperature model and the measured value of the actual temperature. Calculate the learning value to do. Therefore, the accuracy of the temperature model can be further improved.
  • the temperature control device 9 calculates a learning value for correcting the predicted value of the temperature of the rolled material 8 based on the actual MT value. Therefore, the accuracy of the temperature model can be further improved.
  • the cooling water can be maintained in a state of covering the surface of the rolled material 8 directly under the intermediate thermometer 6. Therefore, the surface temperature of the rolled material 8 may not be accurately measured by the intermediate thermometer 6.
  • the water injection valve 2b closer to the intermediate thermometer 6 may be closed preferentially.
  • FIG. 7 is a hardware configuration diagram of the temperature control device for the hot rolling line according to the first embodiment.
  • Each function of the temperature control device 9 can be realized by a processing circuit.
  • the processing circuit includes at least one processor 100a and at least one memory 100b.
  • the processing circuit comprises at least one dedicated hardware 200.
  • each function of the temperature control device 9 is realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. At least one of the software and firmware is stored in at least one memory 100b. At least one processor 100a realizes each function of the temperature control device 9 by reading and executing a program stored in at least one memory 100b. At least one processor 100a is also referred to as a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP.
  • at least one memory 100b is a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, EEPROM, magnetic disk, flexible disk, optical disk, compact disk, mini disk, DVD or the like.
  • the processing circuit comprises at least one dedicated hardware 200
  • the processing circuit may be implemented, for example, as a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof.
  • each function of the temperature control device 9 is realized by a processing circuit.
  • each function of the temperature control device 9 is collectively realized by a processing circuit.
  • a part may be realized by the dedicated hardware 200, and the other part may be realized by software or firmware.
  • the function of the control unit 9c is realized by a processing circuit as dedicated hardware 200, and for functions other than the function of the control unit 9c, at least one processor 100a reads a program stored in at least one memory 100b. It may be realized by executing.
  • the processing circuit realizes each function of the temperature control device 9 with the hardware 200, software, firmware, or a combination thereof.
  • FIG. 8 is a diagram showing predicted values and actual values (repredicted values) of temperature changes of each cutting plate inside the ROT cooling device to which the temperature control device for the hot rolling line according to the second embodiment is applied.
  • the same or corresponding parts as those of the first embodiment are designated by the same reference numerals. The explanation of the relevant part is omitted.
  • the MT predicted value and the MT actual result of the cutting plate 8a If there is a prediction error of the temperature model between the value and the value, the start point (MT) inside the ROT cooling device 3 is corrected to the actual MT value, and then the ROT cooling device 3 is used to reach the CT target value.
  • the predicted value of the temperature change of the rolled material 8 inside is recalculated.
  • the reference values (V 1 rot , V 2 rot , ... V M rot ) of the amount of cooling water to each bank 3a are corrected so that the recalculated predicted value is achieved.
  • the temperature control device 9 when the temperature control device 9 has a temperature model prediction error between the actual temperature value of the rolled material 8 and the predicted temperature value of the rolled material 8 by the intermediate thermometer 6.
  • the water injection valve 3b of the ROT cooling device 3 is controlled so as to compensate for the error. Therefore, the accuracy of the temperature model can be further improved.
  • the temperature control device 9 uses the intermediate thermometer 6 to measure the temperature of the rolled material 8 when there is an error in the temperature model between the actual temperature value of the rolled material 8 and the predicted temperature value.
  • the predicted value of the temperature change of the rolled material 8 inside the ROT cooling device 3 is recalculated with the actual value of the above as the initial value. Therefore, the accuracy of the temperature model can be further improved.
  • FIG. 9 is a diagram showing predicted values and actual values (repredicted values) of temperature changes of each cutting plate inside the accelerated cooling device to which the temperature control device for the hot rolling line according to the third embodiment is applied.
  • FIG. 10 is a diagram showing a predicted value and an actual value (repredicted value) of a temperature change of each cutting plate inside the ROT cooling device to which the temperature control device of the hot rolling line according to the first embodiment is applied.
  • the same or corresponding parts as those of the first embodiment are designated by the same reference numerals. The explanation of the relevant part is omitted.
  • an experiment for identifying the cooling efficiency using the acceleration cooling device 2 and the ROT cooling device 3 alone is performed in advance.
  • the acceleration cooling device 2 and the ROT cooling device 3 Based on the actual temperature drop value (° C), which is the value obtained by subtracting the CT actual value from the FDT actual value of each cutting plate 8a, and the actual number of open water injection valves, the acceleration cooling device 2 and the ROT cooling device 3 The cooling efficiency (° C / valve) per valve is calculated.
  • the speed pattern of the rolled material 8 at this time is the same as that of normal rolling.
  • the cooling efficiency of the acceleration cooling device 2 is a (k) (° C./valve).
  • k is the number of the cutting plate 8a.
  • the predicted temperature drop value of the accelerated cooling device 2 is a (k) ⁇ A (k) (° C.).
  • the predicted temperature drop value of the ROT cooling device 3 is b (k) ⁇ B (k) (° C.).
  • the actual temperature drop by the acceleration cooling device 2 for each cutting plate 8a is calculated by the following equation (5).
  • the actual temperature drop by the ROT cooling device 3 for each cutting plate 8a is calculated by the following equation (6).
  • the predicted value on the entry / exit side of each bank 2a is recalculated with the value obtained by subtracting the value shown in the equation (5) from the FDT actual value as the MT actual value.
  • the MT actual value is used as the initial value, and the value obtained by subtracting the value shown in Eq. (6) from the initial value is used as the CT actual value for prediction on the entry / exit side of each bank 3a. The value is recalculated.
  • the temperature control device 9 has the cooling efficiency obtained by the identification experiment using the accelerated cooling device 2 alone, and the cooling efficiency obtained from the upstream side of the accelerated cooling device 2 and the ROT cooling device 3.
  • the cooling efficiency per valve is calculated from the actual value of the temperature drop of the rolled material 8 to the downstream side and the number of sprays used in the accelerated cooling device 2.
  • the temperature control device 9 has the cooling efficiency obtained by the identification experiment using the ROT cooling device 3 alone and the temperature drop of the rolled material 8 from the upstream side to the downstream side of the accelerated cooling device 2 and the ROT cooling device 3.
  • the cooling efficiency per valve is calculated from the actual value and the number of sprays used in the ROT cooling device 3. Therefore, the accuracy of the temperature model can be further improved.
  • the temperature control device 9 may calculate the cooling efficiency of the accelerated cooling device 2 and the cooling efficiency of the ROT cooling device 3 and the cooling efficiency by using the ratio of the accelerated cooling device 2 and the ROT cooling device 3. In this case as well, the accuracy of the temperature model can be further improved.
  • FIG. 11 is a diagram showing a predicted value and an actual value (re-predicted value) of a temperature change of each cutting plate inside the acceleration cooling device to which the temperature control device of the hot rolling line according to the fourth embodiment is applied.
  • FIG. 12 is a diagram showing predicted values and actual values (re-predicted values) of temperature changes of each cutting plate inside the ROT cooling device to which the temperature control device for the hot rolling line according to the fourth embodiment is applied.
  • the same or corresponding parts as those of the first embodiment are designated by the same reference numerals. The explanation of the relevant part is omitted.
  • an experiment for identifying the cooling efficiency using the acceleration cooling device 2 and the ROT cooling device 3 alone is performed in advance. Based on the actual value of temperature drop (° C.) and the actual value of the spray flow rate of the opened valve (m 3 / h), the value obtained by subtracting the actual CT value from the actual FDT value of each cutting plate 8a is combined with the acceleration cooling device 2. cooling efficiency per one valve between the ROT cooling device 3 (°C / m 3 / h ) is calculated. The speed pattern of the rolled material 8 at this time is the same as that of normal rolling.
  • the cooling efficiency of the accelerated cooling device 2 and ⁇ (k) (°C / m 3 / h).
  • the cooling efficiency of the ROT cooling device 3 and ⁇ (k) (°C / m 3 / h).
  • the number of water injection valves 2b used in the acceleration cooling device 2 be A (k) (valve).
  • the number of water injection valves 3b used in the ROT cooling device 3 be B (k) (valve).
  • Pa (m 3 / h / valve) be the spray flow rate per water injection valve 2b in the acceleration cooling device 2.
  • P b (m 3 / h / valve) be the spray flow rate per water injection valve 3 b in the ROT cooling device 3.
  • the temperature drop predicted value of accelerated cooling device 2 is a ⁇ (k) ⁇ A (k ) ⁇ P a (°C).
  • the predicted temperature drop value of the ROT cooling device 3 is ⁇ (k) ⁇ B (k) ⁇ P b (° C.).
  • the actual temperature drop by the acceleration cooling device 2 for each cutting plate 8a is calculated by the following equation (7).
  • the actual temperature drop by the ROT cooling device 3 for each cutting plate 8a is calculated by the following equation (8).
  • the predicted value on the entry / exit side of each bank 2a is recalculated with the value obtained by subtracting the value shown in the equation (7) from the FDT actual value as the MT actual value.
  • the MT actual value is used as the initial value, and the value obtained by subtracting the value shown in Eq. (8) from the initial value is used as the CT actual value for prediction on the entry / exit side of each bank 3a. The value is recalculated.
  • the temperature control device 9 has the cooling efficiency obtained by the identification experiment using the accelerated cooling device 2 alone, and the cooling efficiency obtained from the upstream side of the accelerated cooling device 2 and the ROT cooling device 3.
  • the cooling efficiency per valve is calculated from the actual value of the temperature drop of the rolled material 8 to the downstream side and the volume of the spray flow rate used in the accelerated cooling device 2.
  • the temperature control device 9 has the cooling efficiency obtained by the identification experiment using the ROT cooling device 3 alone and the temperature drop of the rolled material 8 from the upstream side to the downstream side of the accelerated cooling device 2 and the ROT cooling device 3.
  • the cooling efficiency per valve is calculated from the actual value and the volume of the spray flow rate used in the ROT cooling device 3. Therefore, the accuracy of the temperature model can be further improved.
  • temperature control device 9 of any of the first to fourth embodiments may be applied to the hot rolling line provided with the acceleration cooling device 2 on the downstream side of the ROT cooling device 3. In this case as well, the accuracy of the temperature model can be improved.
  • the temperature control device for the hot rolling line according to the present invention can be used for the hot rolling system.

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  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

L'invention concerne un dispositif de régulation de température pour un train de laminoirs à chaud ayant un dispositif de refroidissement à table de sortie (ROT) et un dispositif de refroidissement accéléré, le dispositif de régulation de température permettant une augmentation de la précision d'un modèle de température d'un matériau laminé. Le dispositif de régulation de température pour un train de laminoirs à chaud comprend : une unité de calcul côté ROT qui, dans un modèle de température pour prédire la température d'un matériau laminé par rapport à un dispositif de refroidissement ROT qui injecte de l'eau sur le matériau laminé, calcule une valeur prédite de la température du matériau laminé à l'aide d'un coefficient de transfert de chaleur de refroidissement par eau côté ROT représentant la quantité de chaleur retirée par unité de surface lors du refroidissement par eau ; et une unité de calcul côté accélération qui est disposée sur un côté amont ou un côté aval du dispositif de refroidissement ROT, et qui, dans un modèle de température pour prédire la température du matériau laminé par rapport à un dispositif de refroidissement accéléré qui injecte de l'eau sur le matériau laminé dans un état différent du dispositif de refroidissement ROT, calcule une valeur prédite de la température du matériau laminé à l'aide d'une valeur qui est définie, séparément du coefficient de transfert de chaleur de refroidissement par eau côté ROT défini par l'unité de calcul côté ROT, en tant que coefficient de transfert de chaleur de refroidissement par eau côté accélération représentant la quantité de chaleur retirée par unité de surface lors du refroidissement par eau.
PCT/JP2019/025458 2019-06-26 2019-06-26 Dispositif de régulation de température pour train de laminoirs à chaud WO2020261444A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2020534629A JP6954476B2 (ja) 2019-06-26 2019-06-26 熱間圧延ラインの温度制御装置
CN201980006321.3A CN112437702B (zh) 2019-06-26 2019-06-26 热轧生产线的温度控制装置
PCT/JP2019/025458 WO2020261444A1 (fr) 2019-06-26 2019-06-26 Dispositif de régulation de température pour train de laminoirs à chaud

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JPH06218414A (ja) * 1993-01-25 1994-08-09 Nisshin Steel Co Ltd 熱延鋼板の冷却制御方法
JPH09216011A (ja) * 1996-02-08 1997-08-19 Sumitomo Metal Ind Ltd 熱延鋼板の冷却制御方法
JP2001240915A (ja) * 2000-03-01 2001-09-04 Nkk Corp 極低炭素熱延鋼帯の製造方法と、その製造装置
JP2009148809A (ja) * 2007-12-21 2009-07-09 Hitachi Ltd 巻取り温度制御装置および制御方法
WO2014006681A1 (fr) * 2012-07-02 2014-01-09 東芝三菱電機産業システム株式会社 Dispositif de commande de température
JP2015054322A (ja) * 2013-09-10 2015-03-23 株式会社日立製作所 巻取り温度制御装置および制御方法

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JPH06218414A (ja) * 1993-01-25 1994-08-09 Nisshin Steel Co Ltd 熱延鋼板の冷却制御方法
JPH09216011A (ja) * 1996-02-08 1997-08-19 Sumitomo Metal Ind Ltd 熱延鋼板の冷却制御方法
JP2001240915A (ja) * 2000-03-01 2001-09-04 Nkk Corp 極低炭素熱延鋼帯の製造方法と、その製造装置
JP2009148809A (ja) * 2007-12-21 2009-07-09 Hitachi Ltd 巻取り温度制御装置および制御方法
WO2014006681A1 (fr) * 2012-07-02 2014-01-09 東芝三菱電機産業システム株式会社 Dispositif de commande de température
JP2015054322A (ja) * 2013-09-10 2015-03-23 株式会社日立製作所 巻取り温度制御装置および制御方法

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