JP5685985B2 - Composite line and control method of composite line - Google Patents

Description

  The present invention relates to a composite line and a method for controlling the composite line. More specifically, it is suitable as a composite line including a cold rolling mill and continuous processing equipment and a control method thereof.

  Conventionally, a composite line in which an irreversible cold rolling mill and a processing facility such as a surface treatment are connected is known. Such a composite line is configured by connecting, for example, two rewinding machines, a welding machine, an inlet-side looper, a cold rolling mill, an outlet-side looper, and processing equipment including a surface treatment. Specifically, when a metal plate is supplied from the rewinding machine, the metal plate is sent to the welding machine, and the tip is welded to the tail end of the preceding metal plate. The metal plate is once accumulated in the inlet side looper. The metal plate that has passed through the inlet side looper is supplied to a cold rolling mill and rolled to a desired thickness by work rolls of a plurality of cold rolling mills. Thereafter, the metal plate is introduced into the exit-side looper, passes through the exit-side looper, is supplied to the processing facility, and is finally wound on a winder installed on the exit side.

  In such an installation, two rewinding machines are installed to continuously supply the metal plates, and the metal plates are alternately supplied. The tip portion of the alternately supplied metal plate and the tail end of the preceding metal plate are welded by a welding machine, and it is necessary to stop the metal plate in the welding machine during the welding. Moreover, it may be necessary to stop the cold rolling mill, for example, at the time of work roll replacement work of the cold rolling mill.

  The input side looper is configured so that a certain amount of metal plate can be accumulated. When the supply of the metal plate is stopped such as during welding, the metal plate in this looper is sent to the cold rolling mill. The cold rolling mill is prevented from stopping.

  It is configured so that a certain amount of metal plate can be stored in the exit side looper. When the cold rolling mill stops, the cold rolling mill can be stopped by sending the accumulated metal plate to the processing equipment. In other words, the state where the processing equipment is stopped or the processing speed is reduced due to the speed reduction is suppressed.

Japanese Patent Laid-Open No. 06-170430

  As described above, in a conventional composite line including an irreversible cold rolling mill, an inlet side looper and an outlet side looper are provided on the downstream side and the upstream side of the cold rolling mill, respectively. By stopping the metal plate accumulated in the looper at the time of stopping, the entire facility is stopped.

  However, in the structure in which the loopers for storing the metal plate are arranged upstream and downstream of the cold rolling mill as described above, the entire equipment becomes large. In addition, the number of machines in the entire facility increases. However, from the standpoint of reducing running costs, it is desirable to reduce the size of equipment and the number of machines.

  Accordingly, the present invention aims to solve the above-mentioned problems, and has been improved so that the number of machines constituting the composite line can be reduced or the equipment can be downsized while efficiently operating the composite line including the cold rolling mill. A composite line and a control method thereof are provided.

  In order to achieve the above-mentioned object, the composite line of the present invention comprises a winding / rewinding machine for winding and rewinding a metal plate to be rolled, and downstream of the winding / rewinding machine. A welding machine that welds the metal plate newly supplied from the return machine to the previously supplied metal plate, a reversible cold rolling mill that is installed downstream of the welding machine and rolls the passing metal plate, and reversible An intermediate looper that is set downstream of the cold rolling mill and stores the metal plate, and a continuous processing facility that is disposed on the downstream side of the intermediate looper and that performs a predetermined process on the metal plate that has passed through the intermediate looper.

  Here, the rewinding of the metal plate by the winding / rewinding machine means that the metal plate wound around the winding / rewinding machine is sent out, while the winding of the metal plate means winding / rewinding It means that the metal plate is wound again on the return machine.

  In the composite line of the present invention, the reversible cold rolling mill includes a mechanism capable of switching a metal plate passing direction from a forward direction from upstream to downstream or a reverse direction opposite to the forward direction. The intermediate looper includes a mechanism that can change the length of the metal plate accumulated in the intermediate looper. The metal plate accumulated in the intermediate looper is sent to the reversible cold rolling mill and / or the continuous processing equipment side.

  The composite line of the present invention may further include a winding / rewinding machine that is installed between the welding machine and the reversible cold rolling mill and can wind and rewind the metal plate. This winding / rewinding machine makes it possible to rewind the metal plate in accordance with the passing direction of the metal plate in the reversible cold rolling mill.

In the composite line of the present invention, the metal plate rolling process performed by the reversible cold rolling mill includes at least a first rolling for rolling in the forward direction and a second rolling for rolling in the reverse direction after the first rolling. It can include rolling and third rolling that performs rolling in the forward direction again after the second rolling. In this case, the composite line further has a total length of the length of the metal plate sent from the intermediate looper to the reversible cold rolling mill and the length of the metal plate sent from the intermediate looper to the continuous processing facility in the second rolling. Predictors to be predicted and the total length of the metal plates processed by one rolling process so that the total length does not exceed the length of the metal sheets accumulated in the intermediate looper before the second rolling process. A maximum length may be set, and a limit control device that limits the length of the metal plate processed in the first rolling to the maximum length may be provided.

  The composite line control method of the present invention is a control method for controlling any of the composite lines of the present invention described above, and the step of rolling the metal plate in the reversible cold rolling mill is at least rolled in the forward direction. A first rolling step, a second rolling step for rolling in the reverse direction after the first rolling step, and a third rolling step for rolling again in the forward direction after the second rolling step, .

  Alternatively, the control method of the composite line of the present invention sends the length of the metal plate sent from the intermediate looper to the reversible cold rolling mill and the continuous processing equipment from the intermediate looper during the rolling time required for the second rolling step. The rolling process may be performed so that the total length of the metal plate and the length of the metal plate does not exceed the accumulated length of the metal plate in the intermediate looper immediately before the second rolling step.

  Or the control method of the composite line of this invention is good also as what divides | segments a metal plate into a some division and performs a rolling process for every division.

  According to the composite line of this invention, by using a reversible cold rolling mill, it is possible to roll a metal plate to a desired thickness with a smaller number of units than when using a unidirectional cold rolling mill. it can. Therefore, the number of cold rolling mills can be reduced and the entire composite line can be downsized.

  In addition, by installing a winding and unwinding machine upstream of the reversible cold rolling mill, the facility for accumulating metal plates on the inlet side of the reversible cold rolling mill can be omitted, and the composite line can be further updated. The size can be reduced. In addition, by using a winder / rewinder and an intermediate looper that accumulates metal sheets, even in a complex line including a reversible cold rolling mill, the efficiency can be reduced without stopping the processing equipment or reducing the processing speed. The equipment can be operated automatically.

It is a schematic diagram for demonstrating the whole structure of the composite line of Embodiment 1 of this invention. It is a schematic diagram for demonstrating the whole structure of the composite line of Embodiment 2 of this invention. It is a timing chart at the time of compound line operation in Embodiment 2 of this invention. It is a figure for demonstrating values, such as the speed | rate and accumulation | storage length of a metal plate, in each state in complex line driving | operation in Embodiment 2 of this invention. It is a timing chart at the time of compound line operation in Embodiment 3 of this invention. It is a figure for demonstrating values, such as the speed in each state during composite line driving | operation, and the accumulation length of a metal plate, in Embodiment 3 of this invention. It is a figure for demonstrating values, such as the speed in each state during composite line driving | operation, and the accumulation length of a metal plate, in Embodiment 3 of this invention. It is a figure for demonstrating values, such as the speed in each state during composite line driving | operation, and the accumulation length of a metal plate, in Embodiment 3 of this invention. It is a schematic diagram for demonstrating the whole structure of the composite line in Embodiment 4 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof is simplified or omitted.

Embodiment 1 FIG.
[Overall configuration of composite line]
FIG. 1 is a schematic diagram for explaining the overall configuration of the composite line according to Embodiment 1 of the present invention. The composite line in FIG. 1 includes two winding / unwinding machines 2 and 4. A coiled metal plate 6 is set on each of the winding / rewinding machines 2 and 4. A welding machine 10 is installed downstream of the winding / rewinding machines 2 and 4. Two reversible cold rolling mills 12 are installed downstream of the welding machine 10. A work roll 14 is installed inside each reversible cold rolling mill 12. An intermediate looper 16 is installed downstream of the reversible cold rolling mill 12. A continuous processing facility 20 is installed downstream of the intermediate looper 16. The continuous processing facility 20 includes a heat treatment machine 22, a surface treatment machine 24, and a processing machine 26. However, the continuous processing facility 20 may be provided with either of these. A winder 28 is installed downstream of the continuous processing facility 20.

[Operations in each device of the composite line]
The winding / rewinding machines 2 and 4 can each feed the metal plate 6 and can wind the fed metal plate 6. Rewinding the metal plate 6 by the winding and unwinding machines 2 and 4 means that the metal plate 6 wound around the winding and unwinding machines 2 and 4 is sent out to the welding machine 10 side, The winding of the plate 6 means that the metal plate 6 is rewound again on the winding and unwinding machines 2 and 4, and the metal plate 6 is returned to the winding and unwinding machines 2 and 4 from the welding machine 10 side. . In this composite line, the winding and unwinding machines 2 and 4 enable the feeding and winding of the metal plate 6 so that the entrance side looper is omitted.

  In this composite line, the metal plates 6 are alternately supplied from the winding and unwinding machines 2 and 4. That is, for example, when all of the metal plate 6 supplied from one winding / rewinding machine 2 is paid out, the metal plate 6 set in the other winding / rewinding machine 4 is sent out. The operation of the composite line when the metal plate 6 is newly fed out is the same regardless of which of the winding / rewinding machines 2 and 4 is used. The operation of the composite line when the metal plate 6 is newly sent out from the return machine 2 will be described.

  When a new metal plate 6 is sent out from the winding / rewinding machine 2, first, welding with the preceding metal plate 6 is performed. At this time, the preceding metal plate 6 is stopped in a state where the tail end portion 6 </ b> A comes to a predetermined position in the welding machine 10. Similarly, the new metal plate 6 sent out from the winding / rewinding machine 2 is stopped in a state in which the front end portion 6B comes to a predetermined position in the welding machine 10. In the welding machine 10, the tip end portion 6 </ b> B of the metal plate 6 and the tail end portion 6 </ b> A of the preceding metal plate 6 are welded.

  When the welding is completed, following the preceding metal plate 6, a new welded metal plate 6 is sent to the reversible cold rolling mill 12. Here, the reversible cold rolling mill 12 can reverse the direction in which the metal plate 6 flows. That is, in the reversible cold rolling mill 12, even if the passing direction of the metal plate 6 is upstream to downstream, that is, the forward direction from the welding machine 10 side to the intermediate looper 16 side, the reverse direction is opposite to the forward direction. Even so, rolling can be performed. Thereby, in the reversible cold rolling mill 12, the metal plate 6 can be repeatedly passed between the same work rolls 14 to perform rolling a plurality of times. The rolling rate by the work roll 14 can be changed for each rolling in one direction. Therefore, the metal plate 6 can be rolled to a desired thickness by a series of rolling processes. In the following description, in the embodiment, each process until the direction in which the metal plate 6 is fed is switched in a series of rolling processes is referred to as a “pass”.

  For example, when performing the rolling process three times, the metal plate 6 is sent to the work roll 14 in the forward direction in the first pass. Thereafter, in the second pass, the winding and unwinding machine 2 winds up the metal plate 6 that has finished the first pass, and passes the metal plate 6 between the work rolls 14 in the reverse direction. Thereafter, in the third pass, the sheet is returned to the forward direction again, and the metal plate 6 that has finished rolling in the second pass is sent again in the forward direction to pass the work roll 14.

  The metal plate 6 that has been subjected to the rolling process in the reversible cold rolling mill 12 is sent from the intermediate looper 16 to the continuous processing facility 20 to be subjected to each process, and finally is wound up by a winder 28 to form a line. The process at is completed.

  By the way, this composite line is configured so that the processing by the continuous processing equipment 20 can be continuously performed by installing the intermediate looper 16 capable of changing the accumulation length of the metal plate 6. Specifically, the intermediate looper 16 accumulates the belt-shaped metal plate 6 by forming a loop (bending extension). The intermediate looper 16 further has a mechanism capable of changing the size of the loop, and is between the length when the loop size is the maximum and the length when the loop size is the minimum. The accumulation length of the metal plate 6 is changed. Thereby, while operating a composite line, while operating the reversible cold rolling mill 12 efficiently, it suppresses that the continuous processing equipment 20 stops.

  For example, during the welding of the metal plate 6, the metal plate 6 is stopped between the welding machines 10. Accordingly, during this time, the rolling process by the reversible cold rolling mill 12 is not performed, and the metal plate 6 is not fed into the intermediate looper 16. In such a case, the metal plate 6 after completion of the rolling process accumulated in the intermediate looper 16 is sent to the continuous processing facility 20. Thereby, the continuous processing equipment 20 can be operated while the reversible cold rolling mill 12 is stopped.

  When the metal plate 6 rolled in the forward direction from the reversible cold rolling mill 12 is rolled in the reverse direction (reverse pass rolling), the metal plate 6 that has once passed through the reversible cold rolling mill 12 is in the middle. Accumulated in the looper 16. In the case of reverse pass rolling, the accumulated metal plate 6 is sent out from the intermediate looper 16 to the reversible cold rolling mill 12 side. At the same time, the metal plate 6 is also sent out to the continuous processing equipment 20. Here, if the speed in each process, the length of the first metal plate 6 and the like are controlled so that the metal plate accumulated in the intermediate looper 16 is not insufficient, the continuous processing facility 20 can be used even when reverse pass rolling is performed. Stop can be avoided.

In addition, for example, also in the following cases, the reversible cold rolling mill 12 is stopped or decelerated.
(A) When the work roll 14 is replaced or rearranged.
(B) When a welding point or a defect point passes through the work roll 14. At this time, the rolling speed is made slow, or rolling is stopped and the roll gap of the work roll 14 is opened and passed.
(C) When a plate thickness change point for changing a target plate thickness provided at a welding point or an arbitrary place passes through the work roll 14. Also in this case, the rolling speed is slowed or the rolling is stopped, and the roll gap of the work roll 14 is changed to a roll gap that achieves a desired target plate thickness.

  In this composite line, even when the reversible cold rolling mill 12 is stopped and slowed down for reasons such as welding, reverse pass rolling, and others (i) to (c), the intermediate looper 16 is accumulating. The metal plate 6 is sent to the continuous processing facility 20. As a result, the loop size of the intermediate looper 16 is reduced. By changing the accumulation length in the intermediate looper 16 in this way, the processing in the continuous processing facility 20 can be continued, and the line can be operated efficiently without stopping the entire composite line. It is configured to be able to.

In the intermediate looper 16, the metal plate 6 forms a loop while being wound around a movable roll and a fixed roll. Therefore, even in the minimum accumulation state, at least the length of the metal plate 6 in contact with both rolls is accumulated in the intermediate looper 16. However, in the following embodiment, this portion is not included, and the accumulation length of the metal plate 6 that can be sent to each apparatus is referred to as an “effective accumulation length”. The effective accumulation length when the loop size is maximum and minimum is referred to as “maximum accumulation length” and “minimum accumulation length”.

[Rolling ratio and length of rolled metal sheet]
The rolling rate of the work roll 14 can be appropriately set according to the thickness after rolling that is finally required. n pass rolling ratio a _n, the thickness H _n before n th pass _rolling, when the thickness h _n of the n th pass after rolling by the work rolls 14, is defined by the following equation (1).
Rolling ratio a _n = (H _n −h _n ) / H _n (1)
In the following, n is a natural number and indicates how many passes the rolling process is.

  In the first embodiment, the two work rolls 14 are provided. However, for simplification of description, the rolling ratios by the two work rolls 14 are collectively described as a rolling ratio a. In practice, however, the rolling rate may be different for each work roll 14.

In addition, a post-rolling length L _n that is the length of the metal plate after being rolled at the rolling rate an in the _n-th rolling is expressed by the following formula (2).
After rolling length _{L n} = length before rolling _{L (n-1) / (} 1-a n) ···· (2)

[Specific setting of intermediate looper accumulation length and speed in each operation state]
In this composite line, the unwinding speed of the winding / rewinding machines 2, 4 and the follow-up speed of the intermediate looper 16 can be made higher than the maximum rolling speed of the reversible cold rolling mill 12. The rolling speed by the reversible cold rolling mill 12 can be higher than the conveying speed of the continuous processing equipment 20. Hereinafter, setting of the effective accumulation length of the intermediate looper 16 and the speed thereof in each operation state of a series of processing by the composite line will be described.

  Here, the “rolling speed” represents the speed of the metal plate 6 processed and sent out by the rolling mill 12, that is, the speed of the metal plate 6 on the outlet side of the rolling mill 12. The rolling speed can be adjusted by changing the rotation speed of the work roll 14. Hereinafter, the embodiment will be described on the assumption that the rolling speed is controlled to a set target value by controlling the rotation speed of the work roll.

Table as when the rolling speed of the reversible cold rolling mill 12 in the rolling rate a _n is V, the speed v (entry-side speed) on the inlet side of the reversible cold rolling mill 12, the following equation (3) Is done.
Entry-side velocity _{v = (1-a n)} × rolling speed V ···· (3)

  In addition, the metal plate 6 in the continuous processing facility 20 is processed at a constant speed V0. Further, the maximum accumulation length of the metal plate 6 of the intermediate looper 16 is Rmax, the effective accumulation length at the start of a series of processing is R0, and the initial length of the metal plate 6 before rolling is L0.

<Welding>
The metal plate 6 is fed out from the winding / rewinding machine 2, and the rolling in the reversible cold rolling mill 12 is stopped during the welding in the welding machine 10. Even during welding, the metal plate 6 is sent from the intermediate looper 16 to the continuous processing equipment 20 at a speed V0. Therefore, when the welding time is T0, the effective accumulation length Rs at the start of welding needs to satisfy the condition A in order not to stop the continuous processing equipment 20 even during welding.
(Condition A) Rs ≧ V0 × T0
The effective accumulation length R0 after the end of welding is expressed by the following equation (4).
R0 = Rs−V0 × T0 (4)

<Forward rolling>
In a series of rolling processes, forward rolling and reverse rolling are alternately performed a predetermined number of times. In the forward rolling, the metal plate 6 is sent to the reversible cold rolling mill 12 in the forward direction. The rewinding (feeding) speed of the winding / rewinding machine 2 or 4 is set to a speed equal to the speed on the inlet side of the reversible cold rolling mill 12.

In the forward rolling, while the metal plate 6 passes the work roll 14 in the forward direction and the effective accumulation length of the metal plate 6 of the intermediate looper 16 is less than the maximum accumulation length Rmax, The rolling speed V _n in the reversible cold rolling mill 12 is set to be faster than the processing speed V 0 of the continuous processing equipment 20. Hereinafter, in this embodiment, rolling in this state is referred to as “additional rolling”. Note that forward rolling (including follow-up rolling and long-end synchronous rolling) is performed alternately with reverse-pass rolling, which will be described later, after the first pass after welding. Accordingly, the forward rolling (additional rolling and long-end synchronous rolling) is performed with an odd number of passes, and in the following, the number of passes n in the forward rolling is an odd number.

Specifically, the speed V _{n in the n-th additional} rolling is set according to the following equation (5).
T _n1 = (Rmax−R _(n−1) ) / (V _n −V0) (5)
Here, T _n1 is the n-th additional rolling time, and R _(n−1) is the effective accumulation length immediately before the _n- th additional rolling starts.

However, the length of the metal plate 6 processed by rolling for each pass corresponds to a preset length of the metal plate 6. Accordingly, the rolling speed V _n and the follow-up rolling time T _{n1 at the} time of follow-up need to satisfy the following conditions.
(Condition B) V _n ≦ L _n / T _n1
L _n is the length (length after rolling) of the metal plate 6 after the end of rolling of the _n- th pass, and is a value calculated from the above formula (2). When the condition B is not satisfied, the speed and time in the follow-up rolling are set according to the following equation (6).
V _n = L _n / T _n1 (6)
During the additional rolling, the metal plate 6 is accumulated in the intermediate looper 16 at a speed difference (V _n −V 0) between the rolling speed V _n and the processing speed V 0 of the continuous processing equipment 20.

<Long-end synchronous rolling in the forward direction>
When the effective accumulation length of the intermediate looper 16 reaches the maximum accumulation length Rmax during the follow-up rolling in the forward rolling of the n-th pass, the metal plate 6 cannot be accumulated in the intermediate looper 16 any more. Become. Therefore, when the effective accumulation length of the intermediate looper 16 reaches the maximum accumulation length Rmax during the follow-up rolling, the rolling speed is set to the same speed V0 as the speed fed from the intermediate looper 16 to the continuous processing equipment 20. Is done. In this operating state, there is no increase or decrease in the effective accumulation length in the intermediate looper 16, and the maximum accumulation length Rmax is maintained. In the following embodiment, rolling in this state is referred to as “long-end synchronous rolling”.

The long-end synchronous rolling time T _n2 in the n-pass forward rolling is a time for rolling all the metal plates 6 that remain without being rolled after the n-pass additional rolling. Therefore, it is obtained by the following equation (7).
T _n2 = (L _n −V _n × T _n1 ) / V0 (7)

<Reverse pass rolling>
After rolling in the forward direction, the metal plate 6 is fed in the reverse direction into the reversible cold rolling mill 12 by being wound by the winding / rewinding machine 2 or 4. The reverse pass rolling is performed alternately with the forward rolling. Accordingly, the reverse pass rolling is performed with an even number of passes, and in the following, the number of passes n in the reverse pass rolling is an even number.

Assuming that the rolling speed of the reverse pass rolling in the n-th rolling process is V _n , the speed at which the metal plate 6 is fed from the intermediate looper 16 to the reversible cold rolling mill 12 from the above formula (3) is V _n. X (1-a _n ). Therefore, the metal plate 6 in the intermediate looper 16 decreases at a speed of (V _n × (1−a _n ) + V 0). Here, a _n is the reduction ratio of the reverse path rolling.

When rolling after length after completion of rolling the n th pass and L _n, rolling time T _n required for reverse path rolling is obtained by the following equation (8).
T _n = L _n / V _n (8)

Moreover, during reverse path rolling time T _n, the effective accumulation of the intermediate looper 16 is prevented from becoming zero, rolling speed V _n is set to a range satisfying the condition C.
(Condition C) R _(n−1) ≧ (V _n × (1−a _n ) + V0) × T _n
In condition C, R _(n-1) is the effective accumulation length immediately before the start of reverse pass rolling.

  When the reverse pass rolling is completed, the forward rolling is performed again. The forward rolling and the backward rolling in the second and subsequent times are similarly set within a range satisfying the respective conditions A to C. Thus, the rolling of the number of times set to have a desired thickness is repeated in the order of the forward direction and the reverse direction. The metal plate 6 is sent to the continuous processing equipment 20 after the rolling of the final pass is completed, and is wound up by the winder 28 when all the processing is completed.

  As described above, according to the first embodiment, the reversible cold rolling mill 12, the winding and unwinding machines 2, 4 and the intermediate looper 16 are combined, which is required in the conventional composite line. The input side looper and the output side looper can be consolidated into one looper (intermediate looper 16), and the number of devices of the composite line can be reduced as compared with the conventional one, and the entire line can be reduced in size. .

  Further, by using the reversible cold rolling mill 12 instead of the nonreversible cold rolling mill, a rolling rate equivalent to the rolling rate achieved by a conventional tandem nonreciprocal pass rolling mill having a large number of stands is used. Can be realized with a small number of rolling mills. As a result, the entire composite line can be reduced in size.

  By reducing the number of work rolls 14 in this way, the stop period or slow speed period of the reversible cold rolling mill 12 due to the replacement of the work rolls 14 can be shortened, and work efficiency can be improved. it can. Furthermore, in the composite line of the first embodiment, since the metal plate accumulated in the intermediate looper 16 can be processed by the continuous processing equipment 20 during the stop or slow period of the reversible cold rolling mill, the continuous processing equipment The operation can be continued efficiently without stopping 20.

  In addition, the reason for the stop and slow speed of the reversible cold rolling mill 12 described in Embodiment 1 does not constrain the present invention. The same applies to the following embodiments.

  In the first embodiment, the case where two reversible cold rolling mills 12 are used has been described. However, in the present invention, the number of reversible cold rolling mills 12 is not limited to this. In the present invention, it is sufficient that at least one reversible cold rolling mill 12 is installed, and the number of the reversible cold rolling mills 12 can be appropriately set in consideration of the efficiency of the rolling process, the rolling rate, and the like. The same applies to the following embodiments.

  In the first embodiment, the number of passes of the work roll 14 that is the number of passes n of the rolling process can be set according to the required rolling rate and efficiency. At this time, the number of passes is not limited to an odd number. The roll gap of the work roll 14 after changing the positional relationship of the winding / rewinding machines 2 and 4, the welding machine 10, the continuous processing equipment 20 and the winding machine 28, or after rolling in the reverse direction for several passes. It is possible to set the number of rollings to an even number by setting to feed the metal plate 6 to the continuous processing equipment 20 without opening and rolling. The same applies to the following embodiments.

  Further, in the first embodiment, the intermediate looper 16 is configured to be able to change the accumulation length by changing the size of the loop, but the configuration of the intermediate looper 16 is not limited to this, Other configurations may be used as long as the metal plate 6 can be accumulated and the accumulation length can be changed. The same applies to the following embodiments.

Embodiment 2. FIG.
FIG. 2 is a schematic diagram for explaining the overall configuration of the composite line according to Embodiment 2 of the present invention. As shown in FIG. 2, the composite line is replaced with one of the two winding / rewinding machines 2, 4, and the winding / unwinding machine 202 is arranged downstream of the welding machine 10. 1 and the winding line 204, except that only two reversible cold rolling mills 12 are provided in place of the two reversible cold rolling mills 12, and similar to the composite line in FIG. It has a configuration.

In this composite line, the coiled metal plate 6 is always always set on the winding / rewinding machine 2 and sent out from the winding / rewinding machine 2 at the beginning. When the tip 6B of the newly fed metal plate 6 is welded to the tail end 6A of the previous metal plate 6 in the welding machine 10 , the metal plate 6 is first fed to the reversible cold rolling mill 12. The rolling process is performed for a predetermined number of passes.

  Specifically, the metal plate 6 rolled by forward rolling is accumulated in the intermediate looper 16. Here, even when all the metal plates 6 set in the winding / rewinding machine 2 are paid out, the reversible cold rolling mill 12 continues rolling in the forward direction, and the tail end portion 6A of the metal plate 6 is continued. Is reached before the reversible cold rolling mill 12, the reversible cold rolling mill 12 is stopped.

  After stopping, the reversible cold rolling mill 12 is reversed and enters reverse pass rolling. At this time, the metal plate 6 is wound around the winding / unwinding machine 202 by a winding machine 204 such as a belt wrapper. In the subsequent reverse pass rolling, a portion of the metal plate 6 in the intermediate looper 16 that has not been rolled to the target plate thickness is taken up by the winding / unwinding machine 202.

  In the final pass rolling, rolling is continued even after all the metal plates 6 of the winding and unwinding machine 202 have been paid out. Rolling is stopped when the tail end 6A of the metal plate 6 comes to the front of the reversible cold rolling mill 12 again. After the rolling is stopped, the reversible cold rolling mill 12 is rotated in the reverse direction, and the tail end 6A of the metal plate 6 is sent in the welding machine 10 and stopped. Then, it welds with the front-end | tip part 6B of the next metal plate 6 previously set to the winding / rewinding machine 2, and the above processes are repeated again.

  Thus, by installing the winding / unwinding machine 202 between the welding machine 10 and the reversible cold rolling mill 12, the distance from the winding / unwinding machine 202 to the reversible cold rolling machine 12 can be increased. The distance between the winding / rewinding machine 2 and the reversible cold rolling mill 12 can be made shorter. Thereby, the length of the off gauge of the metal plate which cannot be rolled can be shortened.

In the above processing, when reverse pass rolling is performed, the metal plate 6 is wound up by the winding and unwinding machine 202. Accordingly, it takes a rewinding time for winding the metal plate 6 around the winding / unwinding machine 202 before starting the reverse pass rolling. _Assuming that the time required for rewinding is T _n0 , the metal plate 6 of the intermediate looper 16 is reduced by T _n0 × V0 by being sent to the continuous processing equipment 20. Therefore, the effective storage length R _{(n−1) at} the beginning of the nth path needs to satisfy the condition D.
(Condition D) R _(n−1) ≧ V0 × T _n0
Other conditions necessary for the operation of this line and speed calculation conditions are the same as those in the first embodiment.

  Hereinafter, one example of the operating state of the composite line according to Embodiment 2 of the present invention will be shown. FIG. 3 is a timing chart of the rolling process in this example, in which the effective accumulation length of the intermediate looper 16 is shown on the upper side of FIG. 3 and the time change of the rolling speed is shown on the lower side. FIG. 4 is a diagram specifically showing values such as time, speed, and effective accumulation length in each operation state in this example.

  3 and 4, in this example, before the start of operation, the effective accumulation length in the intermediate looper 16 is 600 [m], and the initial length L0 of the metal plate 6 to be processed is 300 [m]. The processing speed V0 of the continuous processing equipment 20 is always operated at a constant 2 [m / s]. Further, the number of passes is n = 3, that is, forward rolling is performed in the first pass, reverse pass rolling is performed in the second pass, and forward rolling processing is performed again in the third pass. For simplification, the rolling ratios a1 to a3 in the first pass, the second pass, and the third pass are all 0.15. However, in practice, the rolling rate in each pass can be set to a different rolling rate.

<Welding (Process A)>
Rolling is stopped during the welding period in FIG. 3, and the rolling speed is 0 [m / s]. During the welding period, the continuous processing equipment 20 continuously processes the metal plate 6 delivered from the intermediate looper 16 at a constant speed V0 = 2 [m / s]. Accordingly, the effective accumulation length R in the intermediate looper 16 decreases by 240 [m] to 120 [m] during 120 [s] during the welding period (a).

<First pass additional rolling (process a)>
When the rolling is started, during the drive-rolling, rolling speed V ₁ was set to a speed 8 [m / s]. Tsuikomi rolling time T ₁₁ is 40 [s]. During this time, the metal plate 6 accumulates in the intermediate looper 16 at a speed difference of 6 [m / s], and the accumulation length of the intermediate looper 16 reaches the maximum accumulation length of 600 [m]. Incidentally, the speed _{V 1} of the Here, add Komi圧 length of time _{T 11} satisfies the condition B.

<First pass long end synchronous rolling (process c)>
After reaching the maximum accumulation length, the speed of the reversible cold rolling mill 12 is set to the same speed V0 = 2 [m / s] as that of the continuous processing equipment 20. During the long-end synchronization period, the accumulation length in the intermediate looper 16 is maintained at a maximum accumulation length of 600 [ m] . The long-end synchronous rolling time for the first pass is 16.47 [s] according to Equation (7). Here, the first pass rolling is completed. The length L ₁ of the metal plate 6 after the rolling becomes 352.94 [m].

<Rewind (Process D)>
After the first pass rolling, the tail end 6A of the metal plate 6 is wound around the winding / unwinding machine 202 by the winding machine 204. The rewinder time T ₂₀ is 25 [s]. During this time, the continuous processing equipment 20, since the metal plate 6 is sent at a constant rate 2 [m / s], the accumulation length R ₂₀ of the intermediate looper 16 and 50 [m] reduced 550 [m] Become.

<Second pass reverse pass rolling (process o)>
Thereafter, reverse pass rolling is performed. Rolling speed V ₂ of the reverse pass rolling is 16 [m / sec], 352.94 after one pass extension [m] a metal plate 6 of the reverse path rolling time T ₂₁ is 25.95 [s]. When converted to the speed of the metal plate 6 on the intermediate looper 16 side, it is 13.6 [m / sec]. Therefore, during the reverse pass rolling period (e), the accumulated length of the metal plate in the intermediate looper 16 decreases at a speed of 15.6 [m / sec]. When reverse pass rolling is completed, the effective accumulation length R ₂₁ in the intermediate looper 16 is 145.16 [m].

<Third pass additional rolling (process)>
Next, rolling in the third pass is started. Effective storage length R ₂₁ of the current intermediate looper 16 is 145.16 [m], it is less than the maximum storage amount 600 [m]. Therefore, additional rolling is performed. Rolling speed V ₃ Here is rolled at 30 [m / s]. Metal plates are accumulated in the intermediate looper 16 at a speed of 28 [m / s]. Time T ₃₀ until the metal plate 6 of the intermediate looper 16 has reached the maximum accumulation length is 16.24 [s].

<3rd pass long end synchronous rolling (process key)>
After the additional rolling, long-end synchronous rolling is performed until the third pass rolling is completed. The time _{T 31,} the above equation (7), which is 0.65 [s]. During this time, the effective accumulation length of the intermediate looper 16 is maintained at the maximum accumulation length of 600 [m], and the third pass rolling is completed.

  In the period from reverse pass rolling to third pass rolling, the next coiled metal plate 6 is prepared in the winding / unwinding machine 2. Thereby, when rolling of the final pass of the preceding metal plate 6 is completed, the preceding metal plate 6 tail end portion 6A is immediately fed back to the welding machine, and the leading end portion 6B of the next metal plate 6 and the preceding metal plate 6B. The welding step (a) with the tail end 6A of the plate 6 can be started.

  As described above, in Embodiment 2, the reversible cold rolling mill 12, the winding / rewinding machine 2, the winding / rewinding machine 202, and the intermediate looper 16 are combined to be necessary for the conventional apparatus. It is possible to combine the two input loopers, the input looper and the output looper, into one. Therefore, further downsizing of the entire line can be achieved, and a series of rolling processes can be efficiently performed by this composite line.

  In the second embodiment, the case where only one reversible cold rolling mill 12 is used has been described. However, the present invention is not limited to this, and for example, two reversible as in the first embodiment. The type cold rolling mill 12 may be used, and many reversible cold rolling mills 12 may be used.

  Moreover, in Embodiment 2, the case where the rolling of the 1st pass-the 3rd pass 3 times was performed was demonstrated. However, the present invention is not limited to this, and the number of passes of the work roll 14, that is, the number of passes, can be set according to the rolling rate necessary to obtain a desired plate thickness. Further, like the first embodiment, the number of rolling is not limited to an odd number.

Embodiment 3 FIG.
Embodiment 3 has the same configuration as the system of FIG. In the system of the third embodiment, when the total length of the base material of the metal plate is long, the total length is divided into a plurality of sections, and a rolling process with a predetermined number of passes and a process by the continuous processing facility 20 are performed for each section. A series of continuous processing is performed.

In this divided rolling process, a series of processes are basically performed as in the process of the second embodiment, but the processes are different only in the following two points.
(1) Except for the rolling process of the last one section of one metal plate 6, the rewinding process before the reverse pass rolling becomes unnecessary.
(2) Except before the start of rolling of the first section of one metal plate 6, welding is not necessary.

  FIG. 5 is a timing chart of a specific rolling process performed by the composite line according to the third embodiment of the present invention. In FIG. 5, the effective accumulation length of the intermediate looper 16 is shown on the upper side, and the time variation of the rolling speed is shown on the lower side. Represents.

  In the example of FIG. 5, the initial base metal length of the metal plate 6 to be input is set to 700 [m], and this is divided into two equal parts, and divided rolling is performed for each section 350 [m]. Here, the number of passes of the rolling process for one section is three passes. However, hereinafter, in the third embodiment, for convenience, n used in the above formulas (1) to (8) and the conditions A to D is a serial number, that is, the first first section of the metal plate 6. The first three passes from the first pass to the end of the third pass of the first half are set to n = 1, 2, 3, and the subsequent third pass of the second half section is set to n = 4, 5, 6 and the second pass that follows. The three paths in the first half section are expressed as n = 7, 8, and 9. The rolling rate in each pass is 0.15. 6 to 8 are diagrams showing numerical values in each operation state of the rolling process of the example of FIG. 5, FIG. 6 is the first half section, FIG. 7 is the first latter section, and FIG. The first half is related to the first half.

<Welding>
As shown in FIGS. 5 and 6, when the first rolling starts, welding of 120 [s] is performed. According to the above equation (1), the effective accumulated length in the intermediate looper 16 is reduced by 240 [m] to 360 [m] during the welding period.

<First pass, 1st pass>
Next, it is the first pass pursuit period of the first half of the first. In consideration of satisfying the condition B by substituting T _n1 in the equation (6), the rolling speed V ₁ of the additional rolling needs to be 4.79 [m / s] or more, and here, 6 [m / s ] Is set. The rolling time is 60 [s] from the above equation (5). After the additional rolling, the length of the metal plate 6 in the intermediate looper 16 reaches the maximum accumulation length Rmax.

After the length of the metal plate 6 in the intermediate looper 16 reaches the maximum accumulation length, the rolling speed is maintained at the same speed 2 [m / s] as the conveying speed to the continuous processing equipment 20. Time T ₁₂ of the long end synchronization rolling are from the formula (7) 25.88 [s].

The length L ₀ of the metal plate 6 processed by the first pass rolling is 350 [m], which is 1/2 of the entire length. Since the rolling reduction is 0.15, after rolling length L ₁ after the first pass rolling from the equation (2) is 411.76 [m].

<First half of the first 2nd pass>
After the first pass rolling, reverse pass rolling is started immediately without rewinding. After rolling length L ₂ after inverse path rolling becomes 484.43 [m]. Considering that the condition C is satisfied by substituting T _n1 in the equation (8), the rolling speed needs to be 5.14 [m / s] or more. Here, the rolling speed is 6 [m / s]. From the formula (8), reverse path rolling time T ₂ are the 80.74 [S].

  During the reverse pass rolling, the metal plate 6 is conveyed to the continuous processing equipment 20 at a constant speed of 2 [m / s]. Accordingly, the metal plate in the intermediate looper 16 during this period decreases at a speed of 7.1 [m / s]. Therefore, after the reverse pass rolling is completed, the metal plate 6 in the intermediate looper 16 decreases by 573.24 [m], and the effective accumulation length becomes 26.76 [m].

<First pass, 3rd pass>
Third pass Tsuikomi rolling, rolling speed V ₃ is a 8 [m / s]. When the additional rolling time until the effective accumulated length reaches the maximum accumulated length at this speed is calculated according to the equation (5), it is 95.54 [s]. However, the condition B is not satisfied in this additional rolling time. Therefore, the follow-up rolling time is T ₃ = 71.24 [s] according to the equation (6). The third pass ends without being brought into the long-end synchronization state. After the third pass, the effective accumulation length of the intermediate looper 16 is 454.20 [m].

<1st half, 1st pass>
The subsequent processing will be described with reference to FIGS. The rolling late compartments for welding work is required, enter the set immediately Tsuikomi rolling roll gap such that the reduction ratio a _4. Here rolling speed V ₄ at is a 6 [m / s]. From the formula (5), the rolling time is 36.45 [s], and the effective accumulation length reaches the maximum accumulation length by this rolling. After that, it is switched to long end synchronization. Time T ₄₂ of the long end synchronization rolling, the equation (8), which is 96.53 [S]. During this time, the effective accumulation length in the intermediate looper 16 is maintained at the maximum accumulation length.

<1st half, 2nd pass>
In the latter half of the rolling process, rewinding is required during reverse pass rolling. Rewinding time T ₅₀ is 25 [s], during which time, the effective storage length is 550 [m]. After the rewinding, reverse pass rolling is performed. Velocity V ₅ of the reverse path rolling is 8 [m / s]. Rolling after length L ₅ of the reverse path rolling a 484.43 [m], the time T ₅₁ required for reverse path rolling is 60.55 [s]. During this time, since the metal plate 6 of the intermediate looper 16 decreases at a speed of 8.8 [m / s], the effective accumulation length in the intermediate looper 16 is 17.13 [m].

<1st half, 3rd pass>
Third pass Tsuikomi rolling, rolling speed V ₆ is a 8 [m / s]. When the additional rolling time until the effective accumulated length reaches the maximum accumulated length at this speed is calculated according to the equation (5), it is 97.14 [s]. However, Condition B is not satisfied in this additional rolling time. Accordingly, the follow-up rolling time is T ₆ = 71.24 [s] according to the equation (6). The third pass ends without being brought into the long-end synchronization state. After the third pass, the effective accumulation length of the intermediate looper 16 is 444.57 [m].

<The first half of the 2nd pass>
The subsequent processing will be described with reference to FIGS. When the second metal plate 6 is supplied, a welding operation is required in the first section. Time required for welding T ₇₀ is 120 [s]. The effective accumulation length of the intermediate looper 16 decreases by 240 [m] to 204.57 [m].

Next, additional rolling is performed. Rolling speed V ₇ are a 6 [m / s]. When the additional rolling time until the effective accumulation length becomes the maximum accumulation length at this speed is calculated according to the equation (5), the condition B is not satisfied. Accordingly, the follow-up rolling time is set to T ₇₁ = 68.63 [s] according to the equation (6). Accordingly, the first-pass rolling is completed without being switched to the long-end synchronized state. After the first pass, the effective accumulation length of the intermediate looper 16 is 479.08 [m].

<2nd pass, 2nd pass>
After the first pass rolling, the reverse pass rolling is started immediately without rewinding in the process of the first half section. After rolling length L ₈ after inverse path rolling is 484.43 [m]. The rolling speed of the reverse path rolling is a 15 [m / s], from the formula (8), reverse path rolling time T ₈ is 32.30 [s].

  During the reverse pass rolling, the metal plate 6 is conveyed to the continuous processing equipment 20 at a constant speed of 2 [m / s]. Accordingly, the metal plate 6 in the intermediate looper 16 during this period decreases at a speed of 14.75 [m / s]. After the reverse pass rolling, the effective accumulation length in the intermediate looper 16 is 2.72 [m].

<Second pass, first half, third pass>
Third pass Tsuikomi rolling, rolling speed V ₉ is a 8 [m / s]. When the follow-up rolling time until the effective accumulation length becomes the maximum accumulation length is calculated according to the equation (5) at this speed, the condition B is not satisfied. Therefore, the follow-up rolling time is T ₃ = 71.24 [s] according to the equation (6). The third pass ends without being brought into the long-end synchronization state. After the third pass, the effective accumulation length of the intermediate looper 16 is 430.16 [m]. Thereafter, the same rolling process as in the first half is performed.

  As described above, by processing the single metal plate 6 in a plurality of sections, the processing facility 20 is also stopped for the metal plate 6 having a long base material length by the composite line of the third embodiment. Or continuous processing without lowering the processing speed.

  In the third embodiment, the case where the metal plate 6 is divided into two equal parts has been described. However, in this invention, it is not restricted to this, What is necessary is just to divide into two or more some divisions. Moreover, the lengths of the sections may be different from each other.

Embodiment 4 FIG.
FIG. 9 is a diagram for explaining a composite line according to Embodiment 4 of the present invention. The composite line in FIG. 9 is the same as the composite line in FIG. 2 except that a predictor 402 and a restriction control device 404 are provided.

In the composite line of the fourth embodiment, the predictor 402 has a function of predicting the lengths L ₁ and L ₂ of the metal plate after rolling in the first pass and the second pass based on the above formula (2). Have. Further, the predictor 402 predicts the total length of the metal plate 6 fed from the intermediate looper 16 in the second pass rolling based on the following equation (9).
Predicted length = L ₁ + (L ₂ / V ₂ ) × V 0 (9)

  The limit control device 404 is a metal plate that is processed in a single process before the first pass rolling so that the predicted length predicted by the predictor 402 is shorter than the maximum storage length that can be stored in the intermediate looper 16. Convert the section length of 6. The restriction control device 404 restricts and stops the winding / rewinding machine 2 when the section length of the metal plate 6 delivered in the first pass reaches the converted section length.

  When the winding and unwinding machine 2 is restricted and stopped, the metal plate 6 is wound up by the winding and unwinding machine 2 by reverse pass rolling. Further, when the reverse pass rolling of the portion subjected to the first pass rolling is completed, the direction is returned to the forward direction again, and the third pass rolling is started.

  As described above, in the fourth embodiment, one processing section of the metal plate 6 can be automatically set and rolled so as not to exceed the maximum accumulation length of the intermediate looper 16.

  In the fourth embodiment, the case where two reversible cold rolling mills 12 are used has been illustrated and described. However, in the present invention, the reversible cold rolling mill 12 is not limited to this, and one or three or more may be used.

  In the above embodiment, when referring to the number of each element, quantity, quantity, range, etc., the reference is made unless otherwise specified or the number is clearly specified in principle. The invention is not limited to the numbers. Further, the structure and the like described in this embodiment are not necessarily essential to the present invention unless otherwise specified or clearly specified in principle.

2, 4 Winding and unwinding machine 6 Metal plate 10 Welding machine 12 Reversible cold rolling mill 14 Work roll 16 Intermediate looper 20 Continuous processing equipment 28 Winding machine 202 Winding and unwinding machine 204 Winding machine 402 Predictor 404 Restriction Control device

Claims (4)

A winding and rewinding machine for winding and rewinding a metal plate to be rolled;
A welding machine installed downstream of the winding and unwinding machine and welding a metal plate newly supplied from the winding and unwinding machine to the previously supplied metal plate;
A reversible cold rolling mill that is installed downstream of the welding machine and that rolls a metal plate that passes therethrough;
An intermediate looper that is set downstream of the reversible cold rolling mill and accumulates metal sheets;
A continuous processing facility that is disposed on the downstream side of the intermediate looper and performs a predetermined process on the metal plate that has passed through the intermediate looper;
The reversible cold rolling mill includes a mechanism capable of switching the direction of passage of the metal plate from the upstream to the downstream or the reverse direction opposite to the forward direction,
The intermediate looper includes a mechanism capable of changing the length of the metal plate accumulated in the intermediate looper,
The metal plate accumulated in the intermediate looper is sent to the reversible cold rolling mill and / or the continuous processing equipment side ,
A rewinding / rewinding machine installed between the reversible cold rolling mill and the welding machine and capable of rewinding and rewinding the metal plate;
The composite line , wherein the metal plate is wound up and rewound by the winding and unwinding machine according to a passing direction of the metal plate in the reversible cold rolling mill . A winding and rewinding machine for winding and rewinding a metal plate to be rolled;
A welding machine installed downstream of the winding and unwinding machine and welding a metal plate newly supplied from the winding and unwinding machine to the previously supplied metal plate;
A reversible cold rolling mill that is installed downstream of the welding machine and that rolls a metal plate that passes therethrough;
An intermediate looper that is set downstream of the reversible cold rolling mill and accumulates metal sheets;
A continuous processing facility that is disposed on the downstream side of the intermediate looper and performs a predetermined process on the metal plate that has passed through the intermediate looper;
The reversible cold rolling mill includes a mechanism capable of switching the direction of passage of the metal plate from the upstream to the downstream or the reverse direction opposite to the forward direction,
The intermediate looper includes a mechanism capable of changing the length of the metal plate accumulated in the intermediate looper,
The metal plate accumulated in the intermediate looper is sent to the reversible cold rolling mill and / or the continuous processing equipment side,
The rolling treatment of the metal plate performed by the reversible cold rolling mill is at least:
A first rolling for rolling in the forward direction;
After the first rolling, second rolling that performs rolling in the opposite direction;
After the second rolling, again including the third rolling for rolling in the forward direction,
In the second rolling, a predictor that predicts the total length of the length of the metal plate sent from the intermediate looper to the reversible cold rolling mill and the length of the metal plate sent from the intermediate looper to the continuous processing facility When,
The maximum length of the metal plate to be processed by one rolling process is set so that the total length does not exceed the length of the metal plate accumulated in the intermediate looper before the second rolling. A limit control device that limits the length of the metal plate processed in the first rolling to the maximum length;
Is further provided. A winding and rewinding machine for winding and rewinding a metal plate to be rolled;
A welding machine installed downstream of the winding and unwinding machine and welding a metal plate newly supplied from the winding and unwinding machine to the previously supplied metal plate;
A reversible cold rolling mill that is installed downstream of the welding machine and that rolls a metal plate that passes therethrough;
An intermediate looper that is set downstream of the reversible cold rolling mill and accumulates metal sheets;
A continuous processing facility that is disposed on the downstream side of the intermediate looper and performs a predetermined process on the metal plate that has passed through the intermediate looper;
The reversible cold rolling mill includes a mechanism capable of switching the direction of passage of the metal plate from the upstream to the downstream or the reverse direction opposite to the forward direction,
The intermediate looper includes a mechanism capable of changing the length of the metal plate accumulated in the intermediate looper,
The metal plate accumulated in the intermediate looper is a control method of a composite line for controlling a composite line, wherein the composite plate is sent to the reversible cold rolling mill and / or the continuous processing equipment side,
The step of rolling the metal plate in the reversible cold rolling mill is at least:
Rolling in the forward direction, a first rolling step;
A second rolling step for rolling in the reverse direction after the first rolling step;
After the second rolling step, a third rolling step for rolling in the forward direction again,
The total of the length of the metal plate sent from the intermediate looper to the reversible cold rolling mill and the length of the metal plate sent from the intermediate looper to the continuous processing facility during the rolling time required for the second rolling step The method for controlling a composite line, wherein the rolling process is performed so that the length does not exceed the accumulated length of the metal plate in the intermediate looper immediately before the second rolling step. The said metal plate is divided | segmented into a some division, The said rolling process is performed for every division, The control method of the composite line of Claim 3 characterized by the above-mentioned.

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