JP2744415B2 - Hot rolled steel coiling temperature control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-rolled steel winding temperature control device for controlling a hot-rolled steel material to a predetermined winding temperature by cooling a hot-rolled hot-rolled steel material in a cooling facility. Things.

[0002]

2. Description of the Related Art Generally, in a hot rolling equipment for steel materials, a finishing rolling mill upstream of a cooling equipment mainly adjusts a rolling speed (finishing speed) so that the temperature of the steel material at the exit side of the finishing rolling mill is adjusted. (The temperature on the finishing side) is controlled to a desired temperature.

[0003] Further, in a cooling facility installed downstream of the finishing mill, the amount of cooling water for cooling the rolled material is adjusted so that the temperature of the steel material on the inlet side of the winder installed downstream of the cooling facility (winding). Is controlled to a desired temperature.

As described above, by controlling the finishing temperature and the winding temperature to desired temperatures, uniform mechanical properties of the steel material are ensured. That is, in order to equalize the mechanical properties of the steel material, the finish-side temperature control and the winding temperature control need to be simultaneously and accurately performed.

However, since these two temperature controls are performed individually, fluctuations in the finishing speed due to the finishing temperature control become disturbances in the winding temperature control.

FIG. 5 shows a conventional hot-rolled steel coiling temperature control apparatus, in which 1 is a finish rolling mill for steel S as a rolled material, 3 is a winding mill for steel S, and 4 is a finish rolling mill. 1 is a finishing output side thermometer that measures the temperature of the steel material S that exits 1 and is conveyed to the cooling facility.

[0007] Further, reference numeral 5 denotes a finish output side thickness gauge for measuring the thickness of the steel material S after finish rolling, 6 denotes a finishing speed detector for measuring a conveying speed of the steel material S from the finishing mill 1 to the cooling facility R, 7
Is a winding thermometer for measuring the temperature after cooling by the cooling equipment R.

[0008] The cooling equipment R includes a cooling zone 2a for performing feedforward control and a cooling zone 2b for performing feedback control.

Reference numeral 8 denotes a speed estimating device for estimating the speed of the steel material S based on the output of the finishing speed detector 6, and reference numeral 9 denotes a result of the prediction and the above-mentioned finishing output side thermometer 4 and finishing output side thickness gauge 5.
Is a cooling water amount calculation device that calculates the amount of cooling water according to each detection output.

[0010] Further, 10 is a water injection pattern calculation device for determining a water injection pattern based on the calculated cooling water amount,
Reference numeral 11 denotes a bank opening / closing device that controls opening / closing of the bank according to the water injection pattern.

Next, the operation will be described. Here, a steel part S (i) which is a part of the steel S immediately below the finishing outlet thermometer 4 will be considered. The speed when the steel part S (i) is directly below the finishing thermometer 4 is the same as the finishing speed Vf in the finishing mill 1 at that time. From the actual speed,
An average predicted speed V 'when the steel part S (i) reaches the cooling zone 2a of the cooling facility R and is cooled is calculated.

Next, in the cooling water amount calculating device 9, the predicted speed V ′ of the steel S in the cooling facility R, the finishing temperature on the finishing side by the finishing thermometer 4, the thickness of the finishing side by the finishing thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel part S (i) to the target winding temperature is calculated.

Further, similarly to the steel material S (i), the cooling water amount is similarly calculated for the portion before and after the steel material portion S (i), and in the water injection pattern calculation device 10, the cooling zone 2a of the cooling equipment R is calculated. A cooling water injection pattern, that is, a pattern of a water injection amount of each water injection bank constituting the cooling facility R is determined.

At this time, a water injection pattern is calculated so as to start water injection earlier in consideration of a response delay of the cooling equipment R.

[0015]

Since the conventional hot-rolled steel coiling temperature control apparatus is constructed as described above, the finishing when the steel part S (i) exists immediately below the finishing-side thermometer. In order to predict the speed of the steel part S (i) in the cooling facility R using the actual value of the speed, the speed of the steel part S (i) reaches the cooling facility R from immediately below the finishing-side thermometer 4. There was a problem that it was not possible to cope with a sudden change in the time.

For example, in the conventional speed prediction method, the finishing speed Vf in which the steel part S (i) is located immediately below the finishing outlet thermometer 4 is used.
(I), and the finishing output thermometer 4 before the steel part S (i).
The acceleration of the finishing speed Vf is obtained from the finishing speed Vf (i-1) of the steel part S (i-1) immediately below the finishing output-side thermometer 4 and the gain G is multiplied by this. Assuming that this acceleration rate is maintained until the steel part S (i) reaches the cooling facility, this steel part S (i)
The speed V ′ in the cooling facility R in (i) is expressed as V ′ = G ·
The prediction is made based on the calculation result of (Vf (i-1) -Vf (i)) + Vf (i).

Each steel part S of the steel S in this example
FIG. 6 shows the relationship between the finishing speed Vf immediately below the finishing thermometer 4 from (1) to S (n), the speed V immediately below the cooling facility R, and the predicted speed V ′ in the cooling facility R.

Therefore, according to FIG. 6, the finishing speed Vf
In the range a, since the acceleration gradually increases in the range a, the predicted speed V ′ becomes smaller than the speed V and insufficient cooling occurs. In the range b, the predicted speed V ′ is changed at the portion where the range a is switched from the range a to the range b. In addition to the above, there is a problem in that supercooling occurs in the range c because the predicted speed V ′ is higher than the speed V in the range c.

The predicted speed in the cooling facility R is a speed at a fixed point in the cooling facility R. In the above calculation, the value is fixed by the gain G.

For example, assuming that the gain G is 7.0, the predicted speed V ′ of the steel part S (i) in the cooling facility R is:
The speed at the point in the cooling facility R where the steel part S (i) has advanced by 7 units from the finishing-side thermometer 4 is predicted.

Therefore, in actual cooling, water injection is performed in an arbitrary range in the cooling facility R, so that the predicted speed V '
However, there is a problem that the cooling speed V is different and the supercooling or the insufficient cooling occurs.

Further, conventionally, fixed value table data obtained by converting the above-mentioned response delay of the cooling equipment R into a distance is prepared, and a water injection pattern is calculated using the table data. However, since the distance corresponding to the response delay does not match, there is a problem that overcooling or insufficient cooling occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and uses a predicted speed pattern created on the basis of various speed information of a finishing mill to obtain a speed of a steel material in a cooling facility. It is an object of the present invention to obtain a hot-rolled steel coiling temperature control device capable of predicting a fluctuation and obtaining an optimum water injection pattern (required cooling water injection amount) corresponding to the fluctuation.

According to the present invention, the speed of a steel material in a cooling facility is predicted by using a speed pattern prepared in advance from the temperature on the finishing inlet side and the length from the tip of the steel material on the finishing inlet side in addition to the pressure elongation and the finishing speed. Accordingly, it is an object of the present invention to obtain a hot-rolled steel material winding temperature control device capable of obtaining an optimum water injection pattern corresponding to this.

According to the present invention, a hot-rolled steel material capable of predicting the speed of the steel material in this water injection range and obtaining an optimum watering pattern corresponding to the speed by limiting the water injection range in which the steel material is actually injected. It is an object of the present invention to obtain a winding temperature control device.

According to the present invention, it is possible to correct the water injection timing in accordance with the above-mentioned predicted speed for the steel part for which the required water amount has been calculated based on the predicted speed, thereby performing water injection without shifting the water injection timing. It is an object of the present invention to obtain a winding temperature control device for a hot-rolled steel material which can realize a winding temperature control with high accuracy by injecting a required amount of cooling water into a proper location.

[0027]

According to a first aspect of the present invention, there is provided a hot-rolled steel material winding temperature control apparatus based on a speed control information, a predicted speed pattern created based on the elongation and the finishing speed of the steel material. A speed predicting device for predicting the speed of the steel part in the cooling equipment, and a cooling water amount calculating device for calculating the cooling water amount of the steel part from the predicted speed and the finishing outlet temperature, the actual data of the finishing outlet side plate thickness, and providing the cooling water amount The bank opening / closing device controls opening and closing of each water injection bank in accordance with the water injection pattern in each water injection bank determined by the water injection pattern calculation device based on the above.

[0028] According to a second aspect of the present invention, there is provided a hot-rolled steel material winding temperature control device, comprising: a finishing input-side thermometer for measuring a finishing input-side temperature of steel material to be hot-rolled by a finishing mill; Provided with a length measuring device that measures the length from the tip of the steel material immediately below the thermometer, and a pressure extension measuring device that measures the pressure extension from the distance from the tip of the steel material on the finishing side of the finishing mill,
The speed prediction device, using the speed pattern table created in advance based on the finishing inlet side temperature, the length of the steel material by the length measuring device, the pressure elongation and the finishing speed of the steel material on the finishing outlet side, This is to predict the speed of the steel part in the cooling facility.

In a third aspect of the present invention, there is provided a hot rolled steel coiling temperature control apparatus for predicting a speed at which a steel part reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector. The cooling water amount is calculated based on the device and the predicted speed and the actual output data of the finishing outlet temperature and the finishing plate thickness of the finishing mill, and the water injection range of the cooling equipment to the speed predicting device is calculated from the cooling water amount. And a cooling water amount calculating device for recalculating the cooling water amount is provided, and the water injection pattern is calculated based on the recalculated cooling water amount.

In a fourth aspect of the present invention, there is provided a hot-rolled steel coiling temperature control device including a water injection pattern calculating device for calculating a water injection pattern based on a predicted speed predicted by a speed prediction device and a response delay time of a cooling facility. According to the above water injection pattern,
Each water injection bank is controlled to be opened and closed by a bank opening and closing device.

[0031]

According to the first aspect of the present invention, the hot-rolled steel coiling temperature control device is a speed control device for a rolling mill disposed upstream of a cooling facility, and is provided with speed control information such as an acceleration rate and a maximum speed of the steel material. Is calculated, based on the calculation result, a speed pattern in the cooling facility is created by the speed prediction device, and the speed of the steel material in the cooling facility is predicted.Using the prediction result, the cooling water amount and the water injection pattern are used. Once determined, the opening and closing of the bank is controlled in accordance with this water injection pattern, and optimal winding temperature control is realized.

The hot-rolled steel coiling temperature control device according to the second aspect of the present invention stores in advance a speed pattern table based on the correlation between the entrance temperature and the exit temperature of the finishing mill and the length of the steel material. The speed of the steel material is predicted according to a certain speed pattern, the cooling water amount and the water injection pattern are determined using the prediction result, and the opening and closing of the bank is controlled according to the water injection pattern to realize the optimum winding temperature control.

According to the third aspect of the present invention, the hot-rolled steel material winding temperature control device predicts the speed of the steel material in the water injection range after limiting the water injection range in the cooling facility, and utilizes the prediction result to perform cooling. The amount of water and the water injection pattern are determined, and the opening and closing of the bank is controlled according to the water injection pattern to realize the optimum winding temperature control.

According to a fourth aspect of the present invention, the hot rolled steel coiling temperature control device predicts a time delay from when the cooling water is injected in the cooling equipment to when it hits the hot-rolled steel.
The water injection pattern is selected every moment, and the opening and closing of the bank is controlled in accordance with each of these water injection patterns to realize the optimum winding temperature control.

[0035]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a finish rolling mill for steel S as a rolled material, 3 is a winder for steel S, and 4 is a finisher for measuring the temperature of the steel S which exits the finish rolling mill 1 and is conveyed to a cooling facility. It is a side thermometer.

5 is a finish-side thickness gauge for measuring the thickness of the steel material S after finish rolling, 6 is a finishing speed detector for measuring the transport speed of the steel material S from the finishing mill 1 to the cooling facility R, 7
Is a winding thermometer for measuring the temperature after cooling by the cooling equipment R.

The cooling system R includes a cooling zone 2a for performing feedforward control and a cooling zone 2b for performing feedback control.

Reference numeral 8 denotes a speed estimating device for estimating the speed of the steel S based on the outputs of the finishing speed detector 6 and the outputs of a finishing rolling speed controller and a pressure elongation measuring device, which will be described later. This is a cooling water amount calculation device that calculates the amount of cooling water according to the results and the respective detection outputs of the finishing output side thermometer 4 and the finishing output side thickness gauge 5.

Further, 10 is a water injection pattern calculation device for determining a water injection pattern based on the calculated cooling water amount,
Reference numeral 11 denotes a bank opening / closing device that controls opening / closing of the bank according to the water injection pattern.

Numeral 12 calculates the speed at the tip of the steel S, the acceleration rate, the deceleration rate, the maximum speed, and the final speed at the tail end of the steel S by calculation from the actually measured values, and inputs these to the speed prediction device 8 as speed control information. This is a finish rolling speed control device.

Reference numeral 13 denotes a pressure elongation measuring device for measuring the pressure elongation from the distance from the tip of the steel material S on the exit side of the finishing mill 1, and the measurement output is also input to the speed estimating device 8.

Next, the operation will be described. First, the finish rolling speed control device 12 calculates the speed at the tip of the steel material S, the acceleration rate, the deceleration rate, the maximum speed, and the final speed at the tail end of the steel material S as speed information. Then, the speed information calculated by the finish rolling speed control device 12 and the length of the steel material S are transmitted to the speed prediction device 8 in advance.

On the other hand, the speed predicting device 8 prepares a predicted speed pattern based on the speed information, and determines the distance from the tip of the steel material S on the exit side of the finishing mill 1 to the pressure extension measuring device 13.
While measuring the length by using the above-mentioned predicted speed pattern,
The speed V ′ of the steel part S (i) immediately below the finishing side thermometer 4 in the cooling facility R is predicted.

Next, in the cooling water amount calculating device 9, the predicted speed V 'of the steel S in the cooling facility R, the finishing temperature on the finishing side by the finishing temperature meter 4, the thickness of the finishing side by the finishing thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel part S (i) to the target winding temperature is calculated.

Further, similarly to the steel material S (i), the cooling water amount is similarly calculated for the portion before and after the steel material portion S (i), and in the water injection pattern calculation device 10, the cooling zone 2a of the cooling equipment R is calculated. A cooling water injection pattern, that is, a pattern of a water injection amount of each water injection bank constituting the cooling facility R is determined.

In this embodiment, the speed control information of the finishing mill 1 is automatically obtained in advance by the finishing rolling speed control device 12 so that the speed control information and the extension information of the steel S can be obtained with higher accuracy. The speed fluctuation on the winding side of the steel material S can be predicted, and therefore, the winding temperature can be controlled with higher accuracy by using the predicted value.

Embodiment 2 FIG. FIG. 2 shows another embodiment of the present invention. In the drawing, reference numeral 14 denotes a finishing inlet thermometer for measuring the finishing inlet temperature of the steel S, and 15 denotes a top end of the steel S just below the finishing inlet thermometer 14. A length measuring device that measures the length of
Each of these measurement outputs is input to the speed prediction device 8.

Reference numeral 16 denotes a speed pattern table determined in advance based on target values such as the finishing temperature, finishing thickness, and steel type of the steel material S, and the actual values of the finishing inlet temperature and the finishing temperature. . In addition, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

Next, the operation will be described. First, steel material S
Is measured by the finishing inlet thermometer 14 while measuring the distance from the tip of the steel S just below the finishing inlet thermometer 14 by the length measuring device 15.

Next, the speed predicting device 8 determines in advance the target value of the distance from the length measuring device 15, the finishing temperature of the steel material S, the thickness of the finishing material side, the steel type, etc., and the actual value of the finishing temperature on the finishing side. Using the prepared speed pattern table 16, while measuring the distance from the tip of the steel material S on the outlet side of the finishing mill 1 by the pressure elongation measuring device 13, the steel part S immediately below the finishing outlet thermometer 4 is measured. The speed V 'in the cooling zone 2a of the cooling facility R of (i) is predicted.

Next, in the cooling water amount calculating device 9, the predicted speed V ′ of the steel material S in the cooling facility R, the finishing temperature on the finishing side by the finishing thermometer 4, the thickness of the finishing side by the finishing thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel part S (i) to the target winding temperature is calculated.

Similarly to the steel material S, the amount of cooling water is calculated for the portion before and after the steel portion S (i), and the water injection pattern calculation device 10 uses the cooling water in the cooling zone 2a of the cooling facility R. A water injection pattern, that is, a pattern of a water injection amount of each water injection bank constituting the cooling facility R is determined.

In this embodiment, when the speed of the finishing mill 1 is controlled by the intervention of an operator, the actual values of the finishing inlet side temperature and the finishing outlet side temperature, the length of the steel material S and the speed pattern corresponding to the finishing speed are determined. By performing the prediction, the winding temperature control can be performed with high accuracy even at the speed at the time of operator intervention.

Embodiment 3 FIG. FIG. 3 is a flowchart showing a winding temperature control procedure by a winding temperature control device according to another embodiment of the present invention. Referring to the drawing, in the winding temperature control device of FIG. 5, the speed of the cooling facility R in the range where the injection is performed in the cooling facility R, for example, predicted using the predicted speed V ′ at the center, is assumed to be V ″.

First, a predicted speed V 'is determined by speed prediction (step ST1), and the amount of cooling water in the cooling facility R is calculated by the cooling water amount calculating device 9 using the predicted speed V' (step ST2). Next, a water injection range in the cooling equipment R is calculated from the cooling water amount (step ST).
3).

Further, the speed V ″ of the steel part S (i) at the center of the above-mentioned water injection range is re-predicted by the speed predicting device 8 (step ST4), and the cooling equipment for the steel portion S (i) is calculated by the cooling water amount calculating device 9. The cooling amount at R is recalculated (step ST2).

In this manner, the same calculation is performed before and after the steel part S (i), and the water injection pattern calculation device 10
To calculate the water injection pattern of the cooling facility R (step S
T5) Control the winding temperature.

Conventionally, using the predicted speed at a fixed point in the cooling facility R, the steps ST1 → ST2 →
Although the cooling amount is calculated in the order of step ST5, in this embodiment, a more appropriate water injection amount is calculated by predicting the speed of the steel material S after limiting the place where the steel material S is actually injected. it can.

Embodiment 4 FIG. FIG. 4 shows another embodiment of the present invention. In the drawing, reference numeral 17 denotes a line connecting the speed prediction device 8 and the water injection pattern calculation device 10, and the line 17 indicates the predicted speed calculated by the speed prediction device 8. Inform the water injection pattern calculation device 10.

The other components that are the same as those shown in FIG. 1 are given the same reference numerals, and redundant description is omitted.

Next, the operation will be described. First, for the steel part S (i) just below the finishing temperature 4, the speed Vf immediately below the finishing thermometer 4 is measured, and the cooling equipment R is measured.
Is calculated.

Next, the predicted speed V ′ is taken into the water injection pattern calculation device 10 to obtain the predicted speed V ′.
Water injection start correction distance ΔL from the response delay time of cooling equipment R
T is calculated, and the steel part S (i-ΔLT) located before the steel part S (i) by ΔLT is set in the cooling zone 2 of the cooling equipment R.
When the end of the water injection range of a is reached, water injection is started.

The water injection timing is corrected for the steel parts S (1) to S (n) over the entire length of the steel S to determine the water injection pattern. These processes are executed by the water injection pattern calculation device 10. Further, the response delay time of the cooling equipment R, that is, the steel material S hot-rolled after the cooling water is injected.
Is used by reading out data stored as table data.

According to this embodiment, the water injection timing is corrected according to the predicted speed for the steel part S (i) for which the required water amount has been calculated based on the predicted speed, so that the water injection timing does not shift. Water can be reliably injected, and the winding temperature of the hot-rolled steel material can be accurately controlled.

[0065]

As described above, according to the first aspect of the present invention, the speed of the steel part in the cooling equipment is determined based on the speed control information, the pressure elongation, and the predicted speed pattern created based on the finishing speed of the steel. A speed prediction device for predicting, a cooling water amount calculating device for calculating a cooling water amount of the steel part from the predicted speed and the finishing outlet temperature, actual data of the finishing outlet plate thickness, and a water injection pattern calculating device based on the cooling water amount are provided. Depending on the water injection pattern determined at each water injection bank,
Since each water injection bank is configured to be controlled to open and close, the speed fluctuation of the steel material in the cooling equipment is predicted by the predicted speed pattern created based on various speed information of the finishing mill, and the optimal water injection pattern ( The required cooling water injection amount) can be obtained.

According to the second aspect of the present invention, there is provided a finishing thermometer for measuring a finishing temperature of a steel material to be hot-rolled by a finishing mill, and a tip of the steel material immediately below the finishing thermometer. A length measuring device for measuring the length of the steel plate and a pressure elongation measuring device for measuring the pressure elongation from the distance from the tip of the steel material on the finishing side of the finishing mill are provided. Using the speed pattern table prepared in advance based on the temperature, the length of the steel material by the length measuring device, the pressure extension and the finishing speed of the steel material on the finishing side, the speed of the steel material part in the cooling equipment for the steel material is predicted. Because it was configured as
In addition to the pressure extension and finishing speed, the speed of the steel material in the cooling facility was predicted using a prepared speed pattern from the finishing inlet temperature and the length from the steel tip on the finishing inlet side, and the corresponding There is an effect that an optimum water injection pattern (required cooling water injection amount) can be obtained.

According to the third aspect of the present invention, there is provided a speed predicting apparatus for predicting a speed at which a steel part reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector. The cooling water amount is calculated based on the actual output data of the finishing outlet temperature and the finishing outlet side plate thickness of the finishing mill, and from this cooling water amount, the speed predicting device is caused to predict the water injection range in the cooling equipment, and the cooling water amount is re-determined. A cooling water amount calculating device for calculating the cooling water amount is provided, and the water injection pattern is calculated based on the recalculated cooling water amount. There is an effect that the speed of the steel material in the range is predicted, and an optimal water injection pattern corresponding to the speed is obtained.

According to the fourth aspect of the present invention, there is provided a water injection pattern calculating device for calculating a water injection pattern based on the predicted speed predicted by the speed prediction device and the response delay time of the cooling equipment. The opening and closing control is performed by the bank opening / closing device, so that the water injection timing is corrected according to the predicted speed for the steel part for which the required water amount is calculated based on the predicted speed, and the water injection timing may be shifted. In addition to this, there is an effect that an optimum watering pattern can be obtained in which a necessary amount of cooling water is injected into a necessary place and a winding temperature control can be realized with high accuracy.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an apparatus for controlling a winding temperature of a hot-rolled steel material according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a hot-rolled steel material winding temperature control device according to another embodiment of the present invention.

FIG. 3 is a flowchart of a water injection amount calculation processing procedure showing an operation of a hot rolled steel material winding temperature control device according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a hot-rolled steel material winding temperature control device according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional hot-rolled steel material winding temperature control device.

FIG. 6 is an explanatory diagram showing a relationship between a predicted speed and an actual speed at the time of cooling in a cooling facility of a conventional winding temperature control device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Finishing rolling mill, 4 Finishing output thermometer, 5 Finishing thickness gauge, 6 Finishing speed detector, 8 Speed prediction device, 9 Cooling water amount calculation device, 10 Water injection pattern calculation device, 11
Bank opening / closing device, 12 Finishing rolling speed control device, 13
Pressure extension measuring instrument, 14 Finishing thermometer, 15 Length measuring instrument,
16 Speed pattern table, R cooling equipment.

Claims (4)

(57) [Claims] 1. A finishing rolling speed control device for outputting speed control information of a steel material to be hot-rolled by a finishing rolling mill, and a pressure elongation is measured from a distance from a tip of the steel material on a finishing side of the finishing rolling mill. A pressure elongation measuring device, a speed estimating device for estimating the speed of the steel part in the cooling equipment based on the speed control information, the elongation and the predicted speed pattern created based on the finishing speed of the steel material, A cooling water amount calculating device for calculating a cooling water amount required to cool the steel material portion and portions before and after the steel material portion to a target winding temperature from actual data of the predicted speed and the finishing outlet temperature, the finishing outlet plate thickness, A water injection pattern calculation device that determines a water injection pattern in each water injection bank of the cooling facility based on a cooling water amount, and a van that controls opening and closing of each water injection bank according to the water injection pattern. A winding temperature control device for a hot-rolled steel material, comprising a closing device. 2. A finishing inlet thermometer for measuring a finishing inlet temperature of a steel material to be hot-rolled by a finishing rolling mill, and a measuring device for measuring a length from a tip of the steel material immediately below the finishing inlet thermometer. On the finishing side of the finishing mill, on the finishing output side, a pressure extension measuring device for measuring the pressure extension from the distance from the tip of the steel material, and on the finishing inlet side temperature, the length of the steel material by the length measuring device, the pressure Using a speed pattern table created in advance based on the finishing speed of the steel material on the extension and finish delivery side, a speed prediction device that predicts the speed of the steel material portion in the cooling equipment for the steel material,
A cooling water amount calculation device for calculating a cooling water amount required to cool the steel part and the parts before and after the steel part to a target winding temperature from the actual data of the predicted speed, the finishing outlet temperature, and the finishing outlet plate thickness. A hot-rolled steel material comprising: a water injection pattern calculation device that determines a water injection pattern in each water injection bank of the cooling facility based on the cooling water amount; and a bank opening / closing device that controls opening and closing of each water injection bank according to the water injection pattern. Winding temperature control device. 3. A speed predicting device for predicting a speed at which a steel part reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector, and a predicted predicted speed and a finish delivery side of a finishing mill. Temperature, based on the actual data of the thickness of the finished side plate, calculate the amount of cooling water, from the amount of cooling water the speed prediction device to determine the water injection range in the cooling equipment and re-predict the speed in the center of this water injection range, A cooling water amount calculation device that recalculates the cooling water amount, a water injection pattern calculation device that determines a water injection pattern in each water injection bank of the cooling facility based on the recalculated cooling water amount, and each water injection bank according to the water injection pattern. And a bank opening / closing device for controlling the opening and closing of the hot rolled steel material. 4. A speed predicting device for predicting a speed at which a steel part reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector, and a predicted predicted speed and a finish delivery side of a finishing mill. Temperature, a cooling water amount calculating device for calculating a cooling water amount required to cool the steel material portion and portions before and after the steel material portion to a target winding temperature based on the actual data of the finished plate thickness, and the speed prediction device Winding of a hot-rolled steel material comprising a water injection pattern calculation device for calculating a water injection pattern based on the speed predicted and the response delay time of the cooling equipment, and a bank opening / closing device for opening and closing each water injection bank according to the water injection pattern. Temperature control device.