JP7310772B2 - Mil pacing control method - Google Patents

Description

The present invention relates to a mill pacing control method in a hot rolling line that rolls a metal material to be rolled (hereinafter referred to as rolled material) such as iron and steel, and in particular, to a method for controlling the timing of entering the rolled material into the finishing mill. The present invention relates to a controlled mil pacing control method.

In a hot rolling line 1, an example of which is shown in FIG. 6, a rolled material 19 is heated in a heating furnace 4 (heating step), extracted onto the line, and stripped in a rough rolling mill 3 composed of a plurality of mills. After being roughly arranged (rough rolling process), it is processed into a steel strip of a predetermined size by a finishing rolling mill 5 composed of a plurality of mills (finish rolling process). The rolled steel strip is adjusted in temperature (cooling process), wound into a coil by the winder 7 (winding process), and then carried out of the line.

Normally, in such a hot rolling line 1, a plurality of rolled materials 19 are present on the line. The intervals between the rolled materials 19 are controlled to be appropriate.
In addition, since the extraction interval from the heating furnace 4 described above is determined based on the prediction of the transport of each rolled material 19 at the time of extraction, an error from the prediction may occur during the transport. If a collision between the rolled materials 19 is predicted due to an error, the following rolled material 19 in the middle of the line is made to wait temporarily at a predetermined point, and an appropriate gap is provided between the preceding rolled material 19 and the preceding rolled material 19. It is controlled so that

Further, the rolling efficiency and product productivity in the hot rolling line 1 are improved by controlling the interval between the rolled materials 19 so as to be the shortest pitch at which the rolled materials 19 do not collide with each other.
While avoiding such a collision between the rolled materials 19, the extraction interval from the heating furnace 4 is adjusted so that the distance between the rolled materials 19 is the shortest, or the rolled material 19 is moved at a predetermined point in the middle of the line. The control for adjusting the interval of the rolled material 19 by waiting is called mill pacing control.

As a technique related to mill pacing control as described above, for example, in Patent Document 1, a rolled material immediately before entering a roughing mill is checked for interference with the preceding rolled material, and rough rolling is performed only for the time of interference. An example is disclosed in which the entering time of the mill is corrected and the rolling mill is made to wait in front of the roughing mill.
In addition, in Patent Document 2, the time required for the finish rolling process and the winding process of the preceding rolled material, and the preparation time required for preparation on the winding machine side necessary to advance the subsequent rolled material to the winding process is predicted, the waiting time is calculated based on the predicted time, and the waiting time is set in front of the finishing mill.

Japanese Patent Application Laid-Open No. 2003-225702 JP 2013-180324 A

However, as in Patent Document 1, when predicting the interference with the preceding rolled material 19 when reaching a predetermined point before the rough rolling mill 3, the finish rolling process and the winding process, which are the latter processes of the rough rolling process Errors are likely to occur in predictions about

On the other hand, as in Patent Document 2, by predicting the interference with the preceding rolled material 19 and the preparation time of the winding machine 7 at the time of reaching a predetermined point before the finishing rolling mill 5, the finishing rolling The process and the winding process can also be accurately predicted. However, in the event of an unexpected event such as a failure on the side of the winder 7, the prior art does not detect this event and the rolled material 19 enters the finishing mill 5 after a predetermined waiting time has elapsed. Furthermore, there is a possibility that equipment trouble will occur because it will enter the winding machine 7 that has failed.

Therefore, conventionally, by extending the standby time of each rolled material 19 and providing a preliminary standby time, the timing at which the rolled material 19 enters the finishing mill 5 is delayed for a certain period of time, and the winding machine 7 side suddenly It was possible to deal with even if a serious failure occurred.
However, as described above, it is preferable that the interval between the rolled materials 19 is the shortest pitch that does not collide with the preceding rolled material 19 from the viewpoint of rolling efficiency, and there is a problem that the extension of the waiting time hinders the improvement of product productivity. rice field.

The present invention has been made to solve such problems, and provides a mill pacing control method that reliably prevents a rolled material from entering a winding machine in which a failure or the like has occurred without extending the standby time. intended to provide

(1) A mill pacing control method according to the present invention includes a finishing rolling mill for rolling a rolled material extracted from a heating furnace and rough-rolled by a roughing rolling mill; In a hot rolling line having a plurality of winders to take up, the timing of entering the rolled material into the finishing mill is controlled, and the failure information of the plurality of winders and the winding Acquire winding execution information about the execution state, determine whether or not each winding machine can wind the rolled material based on the acquired information, and if there is no winding machine that is determined to be capable of winding, at least A winding possibility determination step of making the rolled material stand by at the entry side of the finishing rolling mill until it is determined that one winding machine is capable of winding; A winder selection step of selecting a winder for winding the rolled material from the winders, and a preceding rolled material preceding the winder selected in the winder selection step and the rolled material. If it is predicted that there will be interference, the winder interference avoidance time to avoid interference with the winder and the preceding rolled material interference avoidance time to avoid interference with the preceding rolled material a waiting time calculation step for calculating a waiting time from both interference avoidance times; and an entry control for controlling the timing at which the rolled material enters the finishing mill based on the waiting time calculated in the waiting time calculating step and a step.

(2) In addition, in the above (1), the winding possibility determination step includes, in addition to the acquired information, the thickness and width range of the rolled material that can be wound by each winding machine. Further, information on the possible winding range is acquired, and whether or not the winding is possible is determined based on the acquired information on the possible winding range.

In the present invention, failure information of a plurality of winding machines and winding execution information regarding the execution state of winding are acquired, and based on the acquired information, it is determined whether or not each winding machine can wind the rolled material. and, if there is no winder determined to be capable of winding, a step of determining whether or not the rolled material is to be placed on standby at the entry side of the finishing rolling mill until it is determined that at least one winder is capable of winding. By providing the above, it is possible to reliably prevent the rolled material from entering the winder in which a failure or the like has occurred.

In addition, by preventing the rolled material from entering the failed coiler, it is no longer necessary to provide a preliminary waiting time for coping with failures, and the waiting time can be minimized. Therefore, production efficiency is improved.

1 is a flow chart illustrating a mill pacing control method according to an embodiment of the present invention; 1 is a schematic diagram showing from a roughing mill to a winder in a hot rolling line according to an embodiment of the present invention; FIG. FIG. 4 is an explanatory diagram illustrating a possible winding range of the winding machine according to the embodiment of the present invention; FIG. 4 is an explanatory diagram illustrating a control example of the mill pacing control method according to the embodiment of the present invention; It is a figure which shows the improvement effect of productivity which concerns on the Example of this invention. It is a figure showing an example of a hot rolling line to which the present invention is applied.

A mill pacing control method according to an embodiment of the present invention controls the timing at which a rolled material enters a finishing mill in a hot rolling line.
Before describing the mill pacing control method, an example of a hot rolling line to which the mill pacing control method of the present embodiment is applied will be described with reference to FIG.
FIG. 2 schematically shows only the main configuration of the downstream portion from the roughing mill 3 in the hot rolling line 1 according to the present embodiment. In FIG. 2, the same reference numerals are given to the same or corresponding parts as in FIG.

The hot rolling line 1 shown in FIG. 2 includes a heating furnace 4 (see FIG. 6), a roughing mill 3 composed of a plurality of mills (only the most downstream mill is shown), and a finish rolling mill composed of a plurality of mills. machine 5, three winders 7 (general winders 7a and 7b, special winder 7c for extra-thick materials) installed by branching from the main line, and control for executing mill pacing control and a control unit 9 for performing various arithmetic processing, and a winder control unit 11 for controlling and monitoring the state of the winder 7 .
In this example, a first point 13, a second point 15, and a third point 17 branch from the main line upstream of the general winding machines 7a and 7b and the special winding machine 7c for extra-thick materials, respectively.

When the rolled material 19 is extracted from the heating furnace, the rolled material 19 is conveyed by a conveying device (not shown), roughly adjusted in thickness by the rough rolling mill 3, and finished rolled to a predetermined thickness by the finishing rolling mill 5. , is wound into a coil by any one of the winders 7 . These controls are performed by the control unit 9 and the winder control unit 11 based on order information 21 indicating product requirements for each rolled material 19 .

The rolled material 19 wound into a coil (hereinafter referred to as coil 23) is removed from the winder 7 and carried out of the line. The winding machine 7 from which the coil 23 has been removed is changed by the winding machine control unit 11 according to the rolled material 19 to be wound next, and when the setting change is correctly completed, the next rolled material 19 can be wound. can be taken up.
The time required for unloading the coil 23 of the rolled material 19 wound in advance and for changing the setting according to the rolled material 19 to be wound next is referred to as the preparation time of the winder 7 .

Normally, in the hot rolling line 1, the leading end side of the finish-rolled strip 19 is wound by the winder 7 while the trailing end side is finish-rolled at the same time (see FIG. 2). It is necessary to allow the trailing strip 19 to enter the finishing mill 5 in consideration of not only the collision with the strip 19 but also the above-described preparation time of the winder 7 .

In this regard, by providing a plurality of winding machines 7 as in this example, after the preceding rolling material 19 is completely wound by one winding machine 7, another winding can be performed without waiting for the coil 23 to be carried out. Since the next rolling material 19 can be wound by the machine 7, the preparation time can be shortened, which is efficient.

In addition, one of the three winders 7 in this example (indicated by shading in the figure) is a board that can be wound with the other two (general winders 7a and 7b). It is a special winding machine 7c for extra-thick materials with different thickness ranges. The difference in the possible winding range between the ordinary winding machines 7a and 7b and the winding machine 7c for extra-thick materials will be described below with reference to FIG.

FIG. 3 shows the production range of the steel strip produced by the hot rolling line 1 in the present embodiment, and the possible winding range of the general winding machines 7a and 7b and the special winding machine 7c for extra-thick materials. It is a thing.
The production range is the range of the final steel strip dimensions set when finish rolling is performed by the finish rolling mill 5 . Here, the minimum value of the plate thickness in the manufacturing range is Tmin, the maximum value is Tmax, the minimum value of the plate width is Wmin, and the maximum value is Wmax.

The general winding machines 7a and 7b can wind the rolled material 19 within the range of width Wmin to Wmax and thickness Tmin to Tb. Further, the extra-thick material winding machine 7c is capable of winding the rolled material 19 having a width of Wmin to Wmax and a thickness of Ta to Tmax.
Therefore, in the manufacturing range of the present embodiment, the plate thickness Tmin to Ta (the range indicated by the diagonal lines rising to the right in FIG. 3) can be wound only by the general winding machines 7a and 7b, and the plate thickness Ta to Tb (the range where the upward slanting line and the downward slanting line in FIG. 3 intersect) can be wound by any of the general winders 7a and 7b and the special winder 7c for extra-thick materials. The thickness of Tb to Tmax (indicated by diagonal lines in FIG. 3) can be wound only by the extra-thick material winding machine 7c.
By providing the winders 7 with different windable ranges in this way, it is possible to cover a wide range of manufacturing. It is necessary to pay attention to this as it may cause troubles such as equipment failure. The winding machine control unit 11 has information about the winding range of the general winding machines 7a and 7b and the special winding machine 7c for extra-thick materials, and controls the winding machine 7 based on the winding range information. is controlling

Next, a mill pacing control method applied to the hot rolling line 1 described above will be described.
The mill pacing control method according to the present embodiment adds finishing mill entry control 25 described below to conventional mill pacing control.
The finishing mill entry control 25 controls the timing of entry of the rolled material 19 before reaching the finishing mill 5 into the finishing mill 5 by the control unit 9 (see FIG. 2), and is shown in FIG. , a winding possibility determination step S1 for determining whether or not the rolled material 19 can be wound in each winding machine 7, a winding machine selection step S3 for selecting the winding machine 7 for winding the rolled material 19, and a finishing rolling mill. 5 , and an entry control step S7 for controlling the timing at which the rolled material 19 enters the finishing mill 5 .
Each of the above steps will be specifically described below with reference to FIGS. 1 to 4. FIG.
In the following description, the rolled material 19 before reaching the finishing mill 5 shown in FIG.

<Winding availability determination step>
In the winding propriety determination step S1, based on the state of the winding machine 7, whether or not the material 27 can be wound is determined for each winding machine 7 (general winding machines 7a and 7b, special winding machine 7c for extra-thick materials). It is a judgment.
When the material 27 reaches a recalculation point 31 (see FIG. 2) provided between the roughing mill 3 and the finishing mill 5, the control unit 9 detects this and detects the failure of the winder control unit 11. Information, winding execution information, and winding range information are obtained, and based on the obtained information, it is determined whether there is a winding machine 7 capable of winding the material 27 (step S1-1).

《Failure information》
The failure information is information indicating the failure state of each winder 7, such as whether or not a failure has occurred. .
In step S1-1, based on the failure information, it is determined that the winding machine 7 with no failure is ``can be wound'' and the winding machine 7 with failure is ``cannot be wound''. When the failed winding machine 7 is recovered and the winding becomes possible, the determination of whether or not winding is possible is changed from "cannot be wound" to "can be wound".

《Winding execution information》
The winding execution information is information indicating whether winding is in progress, and the winding machine control unit 11 constantly monitors the state of the winding machine 7 and the sensor (not shown) provided at the first point 13 and get information in real time.
In step S1-1, based on the winding execution information, the winding machine 7 that is not winding the preceding material 29 is "can be wound", and the winding machine 7 that is in the middle of winding is "can be wound". It is impossible to take.” Note that when the winding machine 7 that has been performing the winding completes the winding, the judgment as to whether or not the winding is possible is changed from "winding impossible" to "winding possible".

《Information on the winding range》
The windable range information is information indicating the windable range of each winder 7 described in FIG. 3, and is held by the winder controller 11 as described above.
In step S1-1, based on the windable range information, the width and thickness of the material 27 determine whether the winder 7 within the windable range can be "wound" and the winder 7 outside the windable range. The take-up machine 7 is determined to be "cannot be taken up".

If there is a winder 7 determined to be "woundable" in all of the above three points of view, the process proceeds to the winder selection step S3. If such a winder 7 is not available, the material 27 is made to wait at a waiting point 33 (see FIG. 2) provided between the recalculation point 31 and the finishing mill 5 (step S1-2).
Further, even while the material 27 is waiting at the standby point 33, the failure information, the winding execution information, and the possible winding range information are periodically acquired, step S1-1 is continuously performed, and the winding machine 7 is changed, and at least one winder 7 is determined to be "woundable" in all of the above-mentioned three viewpoints, the process proceeds to winder selection step S3.

<Winding machine selection step>
The winding machine selection step S3 selects one winding machine 7 for winding the material 27 from among the winding machines 7 determined to be "woundable" in the winding availability determination step S1. .
If there are a plurality of winders 7 determined to be "woundable" in the winding possibility determination step S1, for example, the winder 7 arranged in the upstream side is preferentially selected. selection based on the priority given.

<Waiting time calculation step>
The standby time calculation step S5 predicts whether or not there will be interference with the preceding material 29 and the winder 7 selected in the winder selection step S3 (steps S5-1 and S5-3). If so, the preceding material interference avoidance time (step S5-2) for avoiding interference with the preceding material 29 and the winder interference avoidance time (S5-4) for avoiding interference with the winder 7 are calculated. Then, the standby time of the material 27 at the entry side of the finishing mill 5 is calculated from both interference avoidance times (step S5-5). A method for calculating the standby time will be described later with a specific example.

<Advance control step>
The entering control step S7 controls the timing at which the material 27 enters the finishing mill 5 based on the waiting time calculated in the waiting time calculating step S5.
In the entering control step S7, the waiting time calculated in step S5-5 is referred to (step S7-1), and if the waiting time = 0, the material 27 is caused to enter the finishing mill 5 (step S7-2 ).
If the waiting time is not 0, the material 27 is made to wait at the waiting point 33 (step S7-3). ).

A specific control example of the above-described finishing mill entry control 25 will be described using the state shown in FIG. 2 as an example. In FIG. 2, the general winding machine 7a is in the middle of winding the preceding material 29, and the general winding machine 7b is in a state of failure.

When the material 27 reaches the recalculation point 31, the control unit 9 detects this and determines whether or not the material 27 can be wound by each winder 7 in a winding possibility determination step S1 (step S1-1).
Since the general winding machine 7a is in the middle of winding the preceding material 29, it determines that "winding is impossible" based on the winding execution information.
Further, since the general winding machine 7b is in a state of failure, it is determined that "winding is impossible" based on the failure information.

Since the extra-thick material winding machine 7c has not wound the preceding material and has not failed, it is determined whether or not the material can be wound based on the information on the possible winding range. That is, if the plate thickness of the material 27 is within the range of Tmin<Ta, it is determined that it cannot be wound up.

If it is determined that the extra-thick material winding machine 7c can be wound, the extra-thick material winding machine 7c is selected as the winding machine 7 for winding the material 27 in the winding machine selection step S3. select.

If it is determined that the extra-thick material winding machine 7c cannot be wound, it is determined that there is no winding machine 7 capable of winding the material 27, and the material 27 is made to wait at the standby point 33 ( step S1-2).
Even while the material 27 is waiting at the standby point 33, the control unit 9 periodically acquires the failure information, the winding execution information, and the possible winding range information, and continues step S1-1.
For example, when the general winding machine 7a completes the winding of the preceding material 29 (specifically, when the sensor described above detects that the tail end of the preceding material 29 has passed the first point 13), the winding is executed. Based on the information, the determination of whether or not winding is possible for the general winding machine 7a is changed from "winding impossible" to "winding possible". If it is determined that the general winder 7a is "woundable" based on the failure information and the information on the winding range, the general winder 7a winds the material 27 in a winder selection step S3. Select as winder 7 .

Further, for example, when the general winder 7b recovers from the failure state and becomes able to operate normally, the determination of whether or not the general winder 7b can be wound based on the failure information is changed to "winding not possible". is changed from "can be wound" to "can be wound", and if the general winding machine 7b is determined to be "can be wound" based on the winding range information, a winding machine selection step S3 is performed to select the general winding machine. 7b is selected as the winder 7 for winding the material 27 in question.
In this example, it is assumed that the extra thick material winding machine 7c is selected in the winding machine selection step S3.

When the extra-thick material winding machine 7c is selected in the winding machine selection step S3, the standby time calculation step S5 predicts whether or not the extra-thick material winding machine 7c and the preceding material 29 interfere with each other. This point will be described with reference to FIG.
FIG. 4 shows an example of mill pacing control of the preceding material 29 and the relevant material 27, and the correlation line L1 indicates each point downstream from the roughing mill 3 and the tail end of the preceding material 29 reaching each point. A correlation line L2 indicates the correlation between each point downstream from the roughing mill 3 and the time when the tip of the material 27 reaches each point.

In the standby time calculation step S5, based on various conditions such as the finish rolling speed, when the material 27 enters the finishing mill 5 without waiting at the standby point 33 (see the broken line in the figure), the leading end of the material 27 is calculated. predict the time A that it will take to reach the first point 13 . Furthermore, the time B required for the tail end of the preceding material 29 to reach the first point 13 is predicted based on various conditions such as the finish rolling speed and the winding speed. If the tip of the material 27 is the same as the tail end of the preceding material 29 or reaches the first point 13 before the tail end of the preceding material 29 (A≤B), "interference with the preceding material 29 If not (A>B), it is determined that there is no interference with the preceding material 29 (step S5-1).

In the example shown in FIG. 4, the tip of the material 27 is predicted to reach the first point 13 before the tail end of the preceding material 29, so the preceding material interference avoidance time t1 for avoiding interference with the preceding material 29 is is calculated (step S5-2). The preceding material interference avoidance time t1 is obtained by t1=BA. If it is determined that there is no interference with the preceding material 29, the preceding material interference avoidance time t1 is not calculated, and the process proceeds to step S5-5.

Further, the standby time calculation step S5 is performed until the tip of the material 27 reaches the third point 17 when the material 27 enters the finishing mill 5 without waiting at the standby point 33 (see the broken line in the figure). Estimate the time C required for Further, the preparation time D of the extra-thick material winding machine 7c is calculated. The "preparation time" is the time required to change the setting according to the material 27, as described above. Further, if a coil (not shown) of the rolled material (preceding material) wound prior to the preceding material 29 remains in the extra-thick material winding machine 7c, it is removed and carried out. including the time required for

When the tip of the material 27 reaches the third point 17 at the same time as the time when the preparation for the winding machine 7c for extra-thick materials is completed (indicated by the mark x in the figure) or earlier (C≤D) If not (C>D), it is determined that there is interference with the winder 7 (winder 7c for extra-thick materials). (Step S5-3).

In the example shown in FIG. 4, it is predicted that the tip of the material 27 will reach the third point 17 before the time when the preparation for the extra-thick material winding machine 7c is completed. is calculated (step S5-4). Winder interference avoidance time t2 is obtained by t2=DC. If it is determined that there is no interference with the winder 7 (winder 7c for extra-thick materials), the winder interference avoidance time t2 is not calculated, and the process proceeds to step S5-5.

The preceding material interference avoidance time t1 and the winder interference avoidance time t2 are compared, and the larger value is set as the standby time t3 (step 5-5). In the example shown in FIG. 4, t1<t2, so t3=t2. If only one of the preceding material interference avoidance time t1 and the winder interference avoidance time t2 is calculated, the calculated value may be used as the standby time t3. If neither the preceding material interference avoidance time t1 nor the winder interference avoidance time t2 is calculated, the standby time t3 is set to 0.

Conventionally, when calculating the standby time, the originally necessary standby time t3 is extended to provide a preliminary standby time t4, so that even if a sudden failure occurs on the winder 7 side, it can be dealt with. (see correlation line L3). In this regard, in the present embodiment, in the winding propriety determination step S1, failure information at the time when the material 27 reaches the recalculation point 31 is acquired, and it is determined whether the winder 7 is capable of winding. Therefore, there is no need to provide a preliminary standby time t4 for coping with failure, and the standby time can be minimized.

When the standby time t3 is calculated in the standby time calculation step S5, the entry control step S7 causes the material 27 to wait at the standby point 33 (step S7-3) and enter the finishing mill 5 after the standby time t3 has elapsed. (Step S7-2). By making the material 27 stand by, the tail end of the preceding material 29 has passed the first point 13 when the material 27 reaches the first point 13, as indicated by the correlation line L2 in FIG. , the material 27 does not collide with the preceding material 29 . Further, when the material 27 reaches the third point 17, the winding machine 7c for extra-thick materials is ready, and the material 27 is wound by the winding machine 7c for extra-thick materials.

In this embodiment, the information on the range of possible winding is acquired in step S1-1 to determine whether or not the steel strip can be wound. This determination is not essential if the roll-up range is not exceeded.

As described above, in the mill pacing control method according to the present embodiment, the winding machine 7 in which a failure has occurred is not selected as the winding machine 7 for winding the material 27 in question. Even if the winding machine 7 breaks down, the rolled material 19 (the concerned material 27) does not enter the broken winding machine, and equipment troubles can be reliably prevented.

In addition, since there is no possibility of the rolled material 19 entering the failed winding machine 7, there is no longer a need to provide a preliminary waiting time, which was conventionally provided for coping with failure, and the waiting time can be minimized. It is possible to improve production efficiency.

In the operation in actual operation, before the introduction of the mill pacing control method of the present invention, the rolled material entered the winding machine in a state where winding was impossible (failure occurred, out of the winding possible range, etc.). Equipment trouble caused by this occurred about once a year, but after the introduction, similar equipment trouble has not occurred.
Furthermore, after the introduction, we were able to confirm the effect of improving productivity. FIG. 5 shows the results of comparing productivity before and after introduction. Fig. 5 shows the rolled material (mainly thicknesses between 1.0 mm and 3.5 mm, plate width 800 mm to 1300 mm, steel grades of low carbon and medium carbon), and compared the productivity before and after the introduction. As shown in FIG. 5, after the introduction of the mill pacing control method of the present invention, the production efficiency was improved by about 10% (11.9%) compared to before the introduction.

In addition, in this embodiment described above, an example in which three winders are provided is shown, but the number of winders in the present invention may be plural, and may be two or four or more.

1 Hot Rolling Line 3 Rough Rolling Mill 4 Heating Furnace 5 Finishing Rolling Mill 7 Winding Machine 7a General Winding Machine 7b General Winding Machine 7c Special Winding Machine for Extra-thick Materials 9 Control Section 11 Winding Machine Control Section 13 First Point 15 Second point 17 Third point 19 Rolled material 21 Order information 23 Coil 25 Finishing mill entry control 27 Applicable material 29 Preceding material 31 Recalculation point 33 Standby point

Claims (2)

A hot rolling line having a finishing rolling mill for rolling a rolled material extracted from a heating furnace and rough-rolled by a roughing rolling mill, and a plurality of winding machines for winding the rolling material rolled by the finishing rolling mill. In the mill pacing control method for controlling the timing of entering the rolled material into the finishing mill,
Acquiring real-time failure information obtained by constantly monitoring the plurality of winders and winding execution information related to the winding execution state, and based on the acquired information, the rolling material in each winder It is determined whether or not the rolled material can be wound, and if there is no winder that is determined to be capable of winding, the rolled material is placed on the entry side of the finishing rolling mill until it is determined that at least one winder is capable of winding. A winding availability determination step for waiting at
A winder selection step of selecting a winder for winding the rolled material from among the winders determined to be capable of winding in the winding propriety determination step;
The presence or absence of interference between the winder selected in the winder selection step and the preceding rolled material preceding the rolled material is predicted, and if interference is predicted, interference with the winder is avoided. a waiting time calculation step of calculating a winding machine interference avoidance time and a preceding rolled material interference avoiding time for avoiding interference with the preceding rolled material, and calculating the waiting time from both the interference avoiding times;
and an entry control step of controlling the timing at which the rolled material enters the finishing mill based on the waiting time calculated in the waiting time calculating step. In addition to the obtained information, the winding possibility determination step further obtains information about the thickness and width of the rolled material that can be wound by each winding machine, and obtains the obtained winding. 2. The mill pacing control method according to claim 1, wherein whether or not winding is possible is determined based on available range information.

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