JP2015080788A - Rolled-material temperature control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolled-material temperature control device capable of appropriately controlling a temperature history of a rolled material.SOLUTION: A rolled-material temperature control device includes: a heat-balance calculation feature that calculates a calorie moving in a rolled material in response to water injection from each of a plurality of water injection devices provided on a rolling line on the basis of a temperature model; a temperature calculation feature that calculates a temperature history of the rolled material by the water injection from each of the water injection devices on the basis of a calorie with which the rolled material arrives at a position corresponding to each of the water injection devices, the calorie calculated by the heat-balance calculation feature, and a calorie with which the rolled material leaves the position; and an injection quantity determination feature that determines a quantity of injected water from each of the water injection devices so that the temperature history calculated by the temperature calculation feature is equal to a desired temperature history.

Description

  The present invention relates to a temperature control device for rolled material.

  For example, Patent Document 1 describes a temperature control device for rolled material. The said temperature control apparatus determines the priority of each water injection apparatus with respect to what divided the rolling material virtually into fixed length, and controls water injection. By this control, the winding temperature of the rolled material is controlled.

JP 2000-167615 A

  However, in the temperature control device, the priority of water injection by each water injection device is set in advance. For this reason, the temperature history of a rolling material cannot be controlled appropriately.

  The present invention has been made to solve the above-described problems. The objective of this invention is providing the temperature control apparatus of the rolling material which can control the temperature history of a rolling material appropriately.

  The temperature control device for a rolled material according to the present invention includes a heat balance calculation function for calculating the amount of heat that moves in the rolled material by water injection of each of a plurality of water injection devices provided in a rolling line, based on a temperature model, Based on the amount of heat brought in by the rolled material, the amount of heat calculated by the heat balance calculation function, and the amount of heat brought out by the rolled material, for each position corresponding to each of the water injection devices, A temperature calculation function for calculating the temperature history of the rolled material by water injection from each of the plurality of water injection devices is determined such that the temperature history calculated by the temperature calculation function becomes a desired temperature history. And a water injection amount determining function.

  According to this invention, water injection by each of the water injection devices is determined based on the amount of heat in and out of the position corresponding to each of the water injection devices. For this reason, it is possible to appropriately control the temperature history of the rolled material.

It is a block diagram of the principal part of the rolling line using the temperature control apparatus of the rolling material in Embodiment 1 of this invention. It is a block diagram of the temperature control apparatus of the rolling material in Embodiment 1 of this invention. It is a perspective view of the principal part of the rolling mill using the temperature control apparatus of the rolling material in Embodiment 1 of this invention. It is a figure for demonstrating an example of the temperature calculation by the temperature control apparatus of the rolling material in Embodiment 1 of this invention. It is a figure for demonstrating an example of the temperature calculation by the temperature control apparatus of the rolling material in Embodiment 1 of this invention. It is a figure for demonstrating the detail of the temperature calculation by the temperature control apparatus of the rolling material in Embodiment 1 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping explanation of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a main part of a rolling line that uses a temperature control device for rolled material according to Embodiment 1 of the present invention.

  In the rolling line of FIG. 1, a conveyance table (not shown) is provided on the downstream side of a heating furnace (not shown). The conveyance table includes a plurality of rolls. A roughing mill (not shown) is provided on the downstream side of the transfer table. The rough rolling mill includes one or more rolling stands (not shown). A conveyance table is provided between the rolling stands. The conveyance table includes a plurality of rolls.

  An FET thermometer 1 is provided downstream of the roughing mill. A finishing rolling mill is provided on the downstream side of the FET thermometer 1. The finish rolling mill includes one or more rolling stands 2. The number of rolling stands 2 is represented by N. A transport table (not shown) is provided between the rolling stands 2. The conveyance table includes a plurality of rolls. A plurality of inter-stand water injection devices 3 are provided above and below the transfer table.

  An FDT thermometer 4 is provided on the downstream side of the finishing mill. An ROT is provided on the downstream side of the FDT thermometer 4. The ROT is provided with a plurality of ROT rolls 5. A lower ROT roll water injection device 6 is provided on the downstream side of the ROT roll 5. An upper ROT roll water injection device 7 is provided on the upper side of the ROT roll 5. A CT thermometer 8 is provided on the exit side of the ROT roll 5. A winder 9 is provided on the downstream side of the CT thermometer 8.

  In the rolling line, the heating furnace heats the rolled material 10 made of metal. A conveyance table conveys the rolling material 10 toward a finishing mill by rotating a roll. On the upstream side of the finish rolling mill, the FET thermometer 1 measures the temperature of the rolled material 10. Thereafter, the finish rolling mill rolls the rolled material 10. A conveyance table conveys the rolling material 10 by rotating a roll.

  At this time, the rolling stand 2 adjusts the temperature of the rolled material 10 by changing the rolling speed. For example, as the rolling speed increases, the temperature of the rolled material 10 increases. The inter-stand water injection device 3 adjusts the temperature of the rolled material 10 by pouring water into the rolled material 10. On the downstream side of the finish rolling mill, the FDT thermometer 4 measures the temperature of the rolled material 10.

  The temperature of the rolled material 10 may be accurately controlled by Feed Forward (FF) control, Feed Back (FB) control, or the like. For example, the FF control is performed based on the temperature of the rolled material 10 measured by the FET thermometer 1. For example, the FB control is performed based on the temperature of the rolled material 10 measured by the FDT thermometer 4.

  Thereafter, the rolled material 10 is conveyed on the ROT. At this time, the lower ROT roll water injection device 6 and the upper ROT roll water injection device 7 adjust the temperature of the rolled material 10 by pouring water into the rolled material 10. Thereafter, the rolled material 10 is taken up by a winder 9. As a result, the rolled material 10 becomes a product.

  At this time, the temperature of the rolled material 10 may be accurately controlled by FF control, FB control, or the like. For example, the FF control is performed based on the temperature of the rolled material 10 measured by the FDT thermometer 4. For example, the FB control is performed based on the temperature of the rolled material 10 measured by the CT thermometer 8.

  One or more thermometers may be provided on the ROT. In this case, the measured value of the thermometer is used for FF control and FB control of the temperature of the rolled material 10.

Next, the temperature control device for the rolled material will be described with reference to FIG.
FIG. 2 is a block diagram of the temperature control device for the rolled material according to Embodiment 1 of the present invention.

  In the rolling mill outlet temperature control device 11 of FIG. 2, the rolling mill material position tracking function 11 a tracks the position of the rolling material 10 every moment. The rolling mill material position tracking function 11a grasps the movement of the rolling material 10 at positions corresponding to each of the rolling stands 2 and each of the inter-stand water injection devices 3 based on the tracking result.

  The storage function 11b stores a material temperature model. The material temperature model is a model that describes heat transfer between the rolled material 10 and the external environment (cooling water, air), heat conduction inside the rolled material 10, and heat generation effect due to transformation of the rolled material 10.

  The heat balance calculation function 11c in the rolling stand and the heat balance calculation function 11d in the inter-stand water injection apparatus divide the equipment including the rolling stand 2 and the inter-stand water injection apparatus 3 into a plurality of units. For example, the heat balance calculation function 11 c in the rolling stand uses the roll bit of the rolling stand 2 as a unit. For example, the heat balance calculation function 11c in the rolling stand uses a slightly wider range including the roll bit of the rolling stand 2 as a unit. For example, the inter-stand water injection device internal heat balance calculation function 11d uses the range covered by one water injection valve in the inter-stand water injection device 3 as a unit.

  The heat balance calculation function 11 c in the rolling stand calculates the amount of heat that moves in the rolled material 10 by rolling by each of the rolling stands 2 by the difference method. The inter-stand water injection device internal heat balance calculation function 11d calculates the amount of heat that moves in the rolled material 10 by water injection by each of the inter-stand water injection devices 3 by the difference method.

  The rolling mill outlet temperature calculation function 11e is based on the calculation result of the heat balance calculation function 11c in the rolling stand and the calculation result of the heat balance calculation function 11d in the inter-stand water injection apparatus. The initial value of the amount of water injected by and the rolling speed of the most downstream rolling stand 2 is calculated.

  The rolling mill outlet temperature calculation function 11e calculates the temperature history of the rolled material 10 based on the initial values of the amount of water injected by each of the inter-stand water injection devices 3 and the rolling speed of the most downstream rolling stand 2. The rolling mill outlet temperature calculation function 11e is configured so that the amount of water injected by each of the inter-stand water injection devices 3 and the rolling speed of the most downstream rolling stand 2 are adjusted so that the rolling mill outlet temperature of the rolled material 10 becomes a desired temperature. Repeat the correction.

  The water injection amount / rolling speed determination function 11f determines the water injection amount by each of the inter-stand water injection devices 3 and the rolling speed of the most downstream rolling stand 2 when the FET thermometer 1 measures the temperature of the rolled material 10. .

  The inter-stand water injection device water injection amount control function 11g controls the water injection amount by each of the inter-stand water injection devices 3 at an appropriate timing so as to be the water injection amount determined by the water injection amount / rolling speed determination function 11f. An appropriate timing is set based on the information on the position of the rolled material 10 by the rolling mill material position tracking function 11a.

  The temperature model learning function 11h adjusts the material temperature model so that the temperature history calculated by the rolling mill outlet temperature calculation function 11e approaches the actual temperature history. At this time, the temperature model learning function 11h compares the temperature calculated by the rolling mill outlet side temperature calculation function 11e with the actual value of the temperature of the rolled material 10. The temperature model learning function 11h adds the error at this time to the learning value of the material temperature model corresponding to the rolled material 10 after the next rolled material 10.

  In the winding temperature control device 12 of FIG. 2, the conveyance table material position tracking function 12 a tracks the position of the rolled material 10 every moment. The conveyance table material position tracking function 12a grasps the movement of the rolling material 10 at positions corresponding to each of the lower ROT roll water injection device 6 and each of the upper ROT roll water injection device 7 based on the tracking result.

  The storage function 12b stores the material temperature model. The material temperature model is a model that describes heat transfer between the rolled material 10 and the external environment (cooling water, air), heat conduction inside the rolled material 10, and heat generation effect due to transformation of the rolled material 10.

  The heat balance calculation function 12c in the water injection device divides the lower ROT roll water injection device 6 and the upper ROT roll water injection device 7 into a plurality of units, and calculates the amount of heat that moves in the rolled material 10 by water injection by each unit by the difference method. To do. For example, the heat balance calculation function 12c in the water injection device uses a single water injection valve for the lower ROT roll water injection device 6 and the upper ROT roll water injection device 7 as a unit. For example, the heat balance calculation function 12c in the water injection apparatus uses a cooling bank in which a plurality of water injection valves are collected as a unit.

  The winding temperature calculation function 12d calculates an initial value of the water injection amount for each unit based on the calculation result of the heat balance calculation function 12c in the water injection apparatus.

  The winding temperature calculation function 12d calculates the temperature history of the rolled material 10 based on the initial value of the amount of water injected by each unit. The winding temperature calculation function 12d repeats correction of the water injection amount by each unit so that the winding temperature of the rolled material 10 becomes a desired temperature.

  At this time, there is no water injection in the region from the most downstream ROT roll water injection device 6 and the upper ROT roll water injection device 7 to the CT thermometer 8. The winding temperature calculation function 12d calculates a temperature drop due to air cooling in the region.

  The conveyance table water injection amount control function 12f controls the water injection amount of each unit at an appropriate timing so as to be the water injection amount determined by the water injection device water injection amount determination function 12e. An appropriate timing is set based on the position of the rolled material 10 by the conveyance table material position tracking function 12a.

  The temperature model learning function 12g adjusts the material temperature model so that the temperature history calculated by the winding temperature calculation function 12d approaches the actual temperature history. At this time, the temperature model learning function 12g compares the temperature calculated by the winding temperature calculation function 12d with the actual value of the temperature of the rolled material 10. The temperature model learning function 12g adds the error at this time to the learning value of the material temperature model corresponding to the rolled material 10 after the next rolled material 10.

Next, heat transfer will be described with reference to FIG.
FIG. 3 is a perspective view of a main part of a rolling mill using the rolling material temperature control apparatus according to Embodiment 1 of the present invention.

  Heat transfer includes heat transfer and heat conduction. Heat transfer represents the transfer of heat between the rolled material 10 and the surrounding environment (water or air). The heat conduction represents the movement of heat in the rolled material 10. The heat of the surface of the rolled material 10 is taken away from the heat of the rolled material 10. As a result, the temperature of the rolled material 10 falls. Thermal conduction occurs in the descending portion. Heat conduction occurs even when the rolled material 10 is in any of a transport table, a rolling mill, and a water cooling device.

  In the transfer table, the heat transfer needs to consider only the air cooling effect on the rolled material 10. The air cooling effect is a temperature drop due to radiation and a temperature drop due to convection.

  In the contact region between the roll of the rolling mill and the rolled material 10, heat transfer may take into account heat removal from the rolled material 10 to the roll and heat generation due to friction between the rolled material 10 and the roll. At this time, heat generated when the rolled material 10 is processed may be taken into consideration.

  In the inter-stand water injection device 3, the lower ROT roll water injection device 6, and the upper ROT roll water injection device 7, heat transfer may take into account the water cooling effect and the air cooling effect of the rolled material 10. The water cooling effect is water-cooled convection in which heat is taken away by the cooling water supplied from the inter-stand water injection device 3, the upper ROT water injection device, and the lower ROT roll water injection device 6. The air cooling effect is a temperature drop due to radiation and a temperature drop due to convection. At this time, radiation occurs in the portion of the rolled material 10 covered with water. On the other hand, air-cooled convection does not occur.

  For example, if the rolling temperature is 800 ° C. or higher in hot sheet rolling and plate rolling, the structure of the rolled material 10 is austenite. When the rolling material 10 is cooled, the structure of the rolling material 10 is transformed into ferrite. At this time, transformation heat is generated. Specifically, latent heat is released. As a result, the temperature of the rolled material 10 rises.

Next, the calculation method of the rolling mill delivery side temperature of the rolling material 10 is demonstrated using FIG.
FIG. 4 is a diagram for explaining an example of temperature calculation by the temperature control device for rolled material in Embodiment 1 of the present invention.

As shown in FIG. The length of i-1 is defined as _LSi-1 . The NO. The length of i-1 is defined as L _Ii-1 . No. of the rolling stand 2 The length of i is defined as L _Si .

  For example, the No. For i-1, the No. of the rolling stand 2 is shown. Heat transfer from i-1 is considered. No. of the inter-stand water injection device 3 The heat transfer at i-1 is considered. No. of the rolling stand 2 Heat transfer to i is considered.

Specifically, No. of the rolling stand 2 The outlet side temperature T _Di-1 ^{R of} i-1 is the NO. It becomes the entrance side temperature T _Ei ^{I of} i-1. No. of the inter-stand water injection device 3 At the position corresponding to i-1, there is heat transfer on the upper and lower surfaces of the rolled material 10. The heat transfer is calculated using a material temperature model. No. of the inter-stand water injection device 3 The outlet temperature T _Di ^I of i is the No. of the rolling stand 2. The i-side entry temperature T _{Ei + 1} ^I is obtained.

  At this time, the rolling speed of the rolling stand 2 becomes the operation amount together with the amount of water injected by the inter-stand water injection device 3. However, each speed of the rolling stand 2 is set while ensuring a mass flow balance of the rolled material 10. For this reason, the rolling speed of all the rolling stands 2 cannot be made into the operation amount separately. In the present embodiment, only the most downstream rolling stand 2 is set as the operation amount.

Next, the calculation method of the winding temperature of the rolling material 10 is demonstrated using FIG.
FIG. 5 is a diagram for explaining an example of temperature calculation by the temperature control device for rolled material according to Embodiment 1 of the present invention.

As shown in FIG. 5, the lower ROT roll water injection device 6 No. i-1 and No. of the upper ROT roll water injection device 7. The length of _i−1 is defined as L _i−1 . No. of lower ROT roll water injection device 6. 1 and No. of the upper ROT roll water injection device 7. The length of 1 is defined as _{L i.} No. of lower ROT roll water injection device 6. i + 1 and No. of the upper ROT roll water injection device 7. The length of _{i + 1} is defined as L _{i + 1} .

  For example, the lower ROT roll water injection device 6 has a No. i and No. of the upper ROT roll water injection device 7. For the rolled material 10 below i, No. of the lower ROT roll water injection device 6 is changed. i-1 and No. of the upper ROT roll water injection device 7. Heat transfer from the rolled material 10 under i-1 is considered. No. of lower ROT roll water injection device 6. i + 1 and No. of the upper ROT roll water injection device 7. For the rolled material 10 under i + 1, No. of the lower ROT roll water injection device 6 is set. i and No. of the upper ROT roll water injection device 7. Heat transfer from the rolled material 10 under i is considered.

Specifically, the lower ROT roll water injection device 6 No. i-1 and No. of the water injection device of the upper ROT roll water injection device 7. No. i-1 of the delivery temperature T Di-1 T is lower ROT roll water injection device 6 i and No. of the upper ROT roll water injection device 7. It becomes i entrance temperature T Ei T. No. of lower ROT roll water injection device 6. i and No. of the upper ROT water injection device. At the position corresponding to i, there is heat transfer on the upper and lower surfaces of the rolled material 10. The heat transfer is calculated using a material temperature model. No. of lower ROT roll water injection device 6. i and No. of the upper ROT roll water injection device 7. The outlet side temperature T Di T of i is the No. of the lower ROT roll water injection device 6. i + 1 and No. of the upper ROT roll water injection device 7. It becomes i + 1 entrance temperature T Ei + 1 T.

Next, details of a method for calculating the winding temperature of the rolled material 10 will be described with reference to FIG.
FIG. 6 is a diagram for explaining the details of the temperature calculation by the temperature control device for the rolled material 10 in the first embodiment of the present invention.

  For example, the rolled material 10 is divided into Sections. For example, the Section thickness is set to 1/3 the thickness of the rolled material 10. For example, the length of the Section is set to a length corresponding to the length of the lower ROT roll water injection device 6 and the upper ROT roll water injection device 7.

  For example, Section i, j is the No. 1 and No. of the upper ROT roll water injection device 7. 1 and the Jth Section from the top in the thickness direction of the rolled material 10.

The lengths of Sectin L _i−1 , L _i , and L _{i + 1} may be different or the same. In FIG. 4, heat transfer between each Section is considered.

  In the material temperature model, a formula representing water-cooled heat transfer (heat transfer by convection) is expressed by the following formula (1).

  Air-cooled heat transfer (heat transfer by convection) is expressed by the following equation (2).

In the expressions (1) and (2), the subscripts i and j represent the position of the Section. Qw represents the heat flow (W) by water-cooled heat transfer. Qa represents the heat flow (W) by air-cooling heat transfer. h _w represents the heat transfer coefficient (W / mm ² / K) between the object to be cooled and the cooling water. h _a represents a heat transfer coefficient between the object to be cooled and the ambient air ^{(W / mm 2 / KC)} . S _w represents the water cooled surface area of the object to be cooled (mm ^2). S represents the total surface area (mm ² ) of the object to be cooled. T represents the section temperature (K) of the object to be cooled. _Tw represents the cooling water temperature (K). T _a represents the ambient air temperature (K).

  The heat flow by radiation is expressed by the following (3) based on the Stefan-Boltzmann equation.

In the equation (3), Q _rad is a heat flow (W) by radiation. ε is the emissivity (−). σ is a Stefan-Boltzmann constant (5.6668339 * 10 ⁻¹⁴ (W / mm ² / K ⁴ )).

  The movement of heat from upstream to downstream is expressed by the following equation (4).

In the equation (4), Q _f represents the heat flow (W) between the Sections moving in the conveying direction of the rolled material 10. A is a cross-sectional area in the thickness direction and width direction of Section. φ represents the specific heat (J / kg / K) of the object to be cooled. ρ represents the density (kg / mm ³ ) of the object to be cooled. v represents a moving speed (mm / s).

  Between the Sections in contact with the thickness direction of the rolled material 10, heat conduction from the upstream Section to the downstream side is expressed by the following equation (5).

  Between the Sections in contact with the thickness direction of the rolled material 10, heat conduction from the downstream Section to the upstream side is expressed by the following equation (6).

In equation (5) and the equation (6), _{Q C} is the heat flow due to the thickness direction of the heat conduction between Section (W). k is the thermal conductivity (W / mm / K). d is the distance (mm) between Sections.

  The model of heat flow is represented by a differential equation. The differential equation is expressed by the following equation (7).

The temperature of the rolled material 10 can be calculated by solving the differential equation for each Section using Equation (7). In order to express the temperature of the rolled material 10 in more detail, the number of Sections may be increased. In this case, attention should be paid to an increase in computer load due to an increase in calculation amount.

  According to the first embodiment described above, the temperature drop in each of the lower ROT roll water injection devices 6 and the like is correctly calculated based on the amount of heat at the position corresponding to each of the lower ROT roll water injection devices 6 and the like. be able to. For this reason, although there are restrictions on the lower ROT roll water injection device 6 and the like, an arbitrary temperature drop curve can be specified without specifying the priority order for the use of the water injection valve. As a result, the temperature history of the rolled material can be appropriately controlled. By this control, high-grade steel plates such as DP (double layer steel) and TRIP steel can be easily manufactured.

  At this time, even when the response times of the plurality of water injection valves are different in the lower ROT roll water injection device 6 or the like, only the response times of the plurality of water injection valves need be considered. For example, a valve opening / closing command may be issued early so as to compensate the valve response.

  In addition, you may consider the dead time element required for conveyance of the rolling material 10 with respect to (7) Formula. In this case, the material temperature model is expressed by a linear approximation. The transfer function of the linear approximation is expressed by the following equation (8).

In the equation (8), i is a subscript corresponding to the position of the water injection position. ΔT is a temperature change (K) of the cooled object. The temperature change is represented by an average value in the section thickness direction. K _i is a gain (Ks / mm ³ ). T _R when a constant (s). _TL is the transport dead time (s). F _L is the injection amount in the water injection device ^(m 3 / s). The value of the water-cooled surface area Sw of the body to be cooled may be used as a value equivalent to the water injection amount.

  Equation (8) is not immediately analytically derived from Equation (7). Equation (8) is obtained as a numerical solution by putting the numerical values of the respective parameters into Equation (7). Expression (8) may be expressed by other transfer functions such as a secondary resonance system instead of the first-order lag system.

  In equation (8), when FDT is given as the initial temperature and CT is given as the target temperature, an approximate solution of the water injection amount or the water-cooled surface area of the cooled object to achieve the target temperature drop (FDT-CT). Can be obtained by a simple reverse calculation. In this case, the amount of calculation can be reduced by performing detailed calculation with the value of the approximate solution according to Equation (8) as the initial value.

  Moreover, in the thick plate rolling line without the winder 9, the control method of the present embodiment may be applied when controlling the finishing temperature corresponding to the winding temperature.

  DESCRIPTION OF SYMBOLS 1 FET thermometer, 2 Rolling stand, 3 Water injection apparatus between stands, 4 FDT thermometer, 5 ROT roll, 6 Lower ROT roll water injection apparatus, 7 Upper ROT roll water injection apparatus, 8 CT thermometer, 9 Winding machine, 10 Rolling material, 11 Rolling mill outlet temperature control device, 11a Rolling mill material position tracking function, 11b Storage function, 11c Rolling stand heat balance calculation function, 11d Inter-stand water injection apparatus heat balance calculation function, 11e Rolling mill outlet temperature 11f water injection amount / rolling speed determination function, 11g inter-stand water injection device water injection amount control function, 11h temperature model learning function, 12 winding temperature control device, 12a conveyance table material position tracking function, 12b storage function, 12c water injection device Internal heat balance calculation function, 12d winding temperature Degree calculation function, 12e water injection device water injection amount determination function, 12f transfer table water injection volume control function, 12g temperature model learning function

Claims (5)

A heat balance calculation function for calculating, based on a temperature model, the amount of heat transferred in the rolled material by water injection of each of a plurality of water injection devices provided in the rolling line;
Based on the amount of heat brought in by the rolled material, the amount of heat calculated by the heat balance calculation function, and the amount of heat brought out by the rolled material, for the positions corresponding to each of the plurality of water injection devices, A temperature calculation function for calculating the temperature history of the rolled material by water injection from each of the water injection devices;
A water injection amount determining function for determining a water injection amount by each of the plurality of water injection devices so that a temperature history calculated by the temperature calculation function becomes a desired temperature history;
The temperature control apparatus of the rolling material provided with. A tracking function for tracking the position of the rolled material in the rolling line;
A water injection amount control function for controlling each of the plurality of water injection devices to be a water injection amount determined by the water injection amount determination function at a timing based on the position information of the rolled material tracked by the tracking function,
The temperature control apparatus of the rolling material of Claim 1 provided with these. The heat balance calculation function calculates the amount of heat that moves in the rolled material by water injection of each of the water injection devices on the upstream side of the winder,
The said water injection amount determination function determines the water injection amount by each of these water injection apparatus so that the temperature of the rolling material wound by the said winding machine may turn into desired temperature. Rolling material temperature control device. The heat balance calculation function moves in the rolled material by the amount of heat moved in the rolled material by rolling by each of the plurality of rolling stands alternately arranged with each of the plurality of water pouring devices, and by water injection in each of the plurality of water pouring devices. Calculate the amount of heat,
The temperature calculation function is calculated by the heat balance calculation function and the amount of heat that the rolled material enters with respect to the position corresponding to each of the plurality of rolling stands and the position corresponding to each of the plurality of water injection devices. Based on the amount of heat and the amount of heat that the rolled material brings, calculate the temperature history of the rolled material by rolling by each of the plurality of rolling stands and water by each of the plurality of water injection devices,
The said water injection amount determination function determines the water injection amount by each of these water injection apparatus so that the temperature of the rolling material in the exit side of these rolling stands may become desired temperature. Rolling material temperature control device. A learning function for setting a learning value of the temperature model based on a comparison result between the temperature of the rolled material calculated by the temperature calculating function and the actual value of the temperature of the rolled material,
The temperature control apparatus of the rolling material as described in any one of Claims 1-4 provided with these.

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