WO2021005818A1

WO2021005818A1 - Method of operating rolling device, control device for rolling device, and rolling equipment

Info

Publication number: WO2021005818A1
Application number: PCT/JP2020/004004
Authority: WO
Inventors: 陽一松井; 優太小田原
Original assignee: ＰｒｉｍｅｔａｌｓＴｅｃｈｎｏｌｏｇｉｅｓＪａｐａｎ株式会社
Priority date: 2019-07-11
Filing date: 2020-02-04
Publication date: 2021-01-14
Also published as: CN114007772B; EP3974075C0; CN114007772A; JPWO2021005818A1; JP7116260B2; EP3974075B1; EP3974075A1; EP3974075A4; WO2021005777A1

Abstract

This method of operating a rolling device including a pair of rolling rolls provided to sandwich a metal plate comprises: a detection step for detecting a plate end position of the metal plate in a plate width direction at an output-side position of the pair of rolling rolls while rolling the metal plate by means of the pair of rolling rolls in a state in which an output-side tensile force applied to the metal plate is zero; a first leveling step for draft-leveling-controlling the pair of rolling rolls such that an outflow direction of the metal plate from the rolling rolls is along a transport direction of the metal plate in the rolling device when the detection result of the width end position of the metal plate in the detection step deviates from a reference position to one side in the plate width direction; and a second leveling step for, after the first leveling step, draft-leveling-controlling the pair of rolling rolls such that the outflow direction of the metal plate returns to the transport direction after the outflow direction of the metal plate from the rolling rolls is shifted to the outer side in the plate width direction with respect to the transport direction.

Description

Rolling equipment operation method, rolling equipment control equipment and rolling equipment

The present disclosure relates to an operation method of a rolling apparatus, a control device of the rolling apparatus, and a rolling apparatus.

In rolling a metal plate using a rolling mill containing a pair of rolling rolls, the metal plate is subjected to a state in which the tension on the exit side of the rolling mill does not act on the metal plate before the tip of the metal plate is wound by the winding device. Rolling (tip non-tensile rolling) may be performed.

For example, Patent Document 1 uses a rolling apparatus including a rolling mill (rolling roll) and a tension reel (winding apparatus) provided on the outlet side of the rolling mill, and tensions the rolled material (metal plate). It is stated that rolling is performed before it is wound on a reel and the tension on the exit side of the rolling mill is established. Further, in Patent Document 1, a meandering detector is provided on the outlet side of the rolling mill on the upstream side of the tension reel, and the offset amount detected by the meandering detector (the axial center position of the rolling roll and the plate of the rolled material). It is described that the leveling control of the rolling mill is performed based on the difference from the center position in the width direction). As a result, it is possible to improve the yield by suppressing meandering and one-sided elongation of the rolled material that may occur when rolling in the absence of tension on the exit side.

Japanese Unexamined Patent Publication No. 11-179414

By the way, when rolling is performed in a state where the tip tension does not act on the metal plate, an elongation difference occurs at both ends of the rolled metal plate in the plate width direction, and the exit side (downstream side) of the rolling mill. In some cases, the direction of the tip of the metal plate may bend in the width direction of the sheet with respect to the transport direction by the rolling mill (tip bending). When such a bending of the tip of the metal plate occurs, the rolling mill is used so that the plate end position in the plate width direction deviated from the specified position returns to the specified position by using the plate end position detector provided on the exit side of the rolling mill. By operating the above, the outflow direction of the metal plate can be made to follow the transport direction of the rolling mill. However, with such an operation method, it may not be possible to correct the state in which the direction of the tip of the metal plate is bent with respect to the transport direction, and in the state where the tip of the metal plate is bent in this way, the tip of the metal plate is bent. Since the edge is tilted with respect to the rotation axis direction of the winding device, the metal plate may not be properly wound by the winding device.

In view of the above circumstances, at least one embodiment of the present invention is an operation method of a rolling apparatus capable of appropriately winding a metal plate rolled in a state of no tension at the tip by a winding apparatus, and control of the rolling apparatus. The purpose is to provide equipment and rolling equipment.

The method of operating the rolling mill according to at least one embodiment of the present invention is as follows.
A method of operating a rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate.
While rolling the metal plate with the pair of rolling rolls while the ejection side tension applied to the metal plate is zero, the plate end of the metal plate in the plate width direction at the position of the exit side of the pair of rolling rolls. A detection step to detect the position and
When the detection result of the metal plate width end position in the detection step deviates from the reference position to one side in the plate width direction, the outflow direction of the metal plate from the rolling roll is the transport direction of the metal plate in the rolling apparatus. The first leveling step of controlling the rolling rolls under pressure so as to follow the above.
After the first leveling step, the outflow direction of the metal plate from the rolling roll is shifted to the other side of the plate width direction with respect to the conveying direction, and then the outflow direction of the metal plate becomes the conveying direction. A second leveling step for controlling the reduction leveling of the pair of rolling rolls so as to return, and
To be equipped.

According to at least one embodiment of the present invention, there is an operation method of a rolling apparatus capable of appropriately winding a metal plate rolled in a state of no tension at the tip by a winding apparatus, and a control device and a rolling apparatus of the rolling apparatus. Provided.

It is a schematic block diagram of the rolling mill provided with the control device which concerns on one Embodiment. It is a schematic block diagram of the rolling mill provided with the control device which concerns on one Embodiment. It is a schematic block diagram of the controller which comprises the control device which concerns on one Embodiment. It is a flowchart which shows an example of the operation method of the rolling mill which concerns on one Embodiment. It is a schematic diagram which shows the state of a rolling roll and a metal plate at the start of the tip tensionless rolling of a metal plate. It is a schematic diagram which shows the state of a rolling roll and a metal plate at the start of the tip tensionless rolling of a metal plate. It is a schematic diagram which shows the state of a rolling roll and a metal plate at the start of the tip tensionless rolling of a metal plate. It is a figure for demonstrating the determination of whether or not the tip tensionless rolling can be started by a determination part. It is a figure for demonstrating the determination of whether or not the tip tensionless rolling can be started by a determination part. It is a schematic diagram which shows the partial cross section including the plate width direction and the longitudinal direction of the metal plate rolled by the rolling equipment which concerns on one Embodiment. It is a graph which shows an example of the graph which shows the relationship between the roll gap and time. It is a graph which shows an example of the graph which shows the relationship between the roll gap and time. It is a flowchart which shows an example of the operation method of the rolling mill which concerns on one Embodiment. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a graph for demonstrating an example of the calculation method of the 1st elongation difference and the 2nd elongation difference of a metal plate. It is a flowchart which shows an example of the operation method of the rolling mill which concerns on one Embodiment. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a figure which shows the state transition of a metal plate at the time of operating a rolling apparatus based on the flowchart shown in FIG. It is a flowchart which shows an example of the operation method of the rolling mill which concerns on one Embodiment. It is a flowchart which shows an example of the operation method of the rolling mill which concerns on one Embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely explanatory examples. Absent.

First, the overall configuration of the rolling equipment including the rolling apparatus according to some embodiments will be described.
1 and 2 are schematic configuration diagrams of a rolling mill provided with a control device according to an embodiment, respectively. As shown in FIGS. 1 and 2, the rolling equipment 1 includes a rolling apparatus 2 and a control device 100 for controlling the rolling apparatus 2. In some embodiments, the rolling mill 2 may include, for example, one rolling mill 10 as shown in FIG. 1, for example, two rolling mills 10 (10A, 10B) as shown in FIG. May include, or may include three or more rolling mills 10.

The rolling apparatus 2 shown in FIG. 1 is a rolling apparatus (reverse mill) that reciprocates and rolls a metal plate 90 passed between a pair of

rolling rolls

15 and 16. The rolling apparatus 2 shown in FIG. 1 includes a rolling mill 10 including a pair of rolling rolls (work rolls) 15 and 16 provided so as to sandwich a metal plate 90 which is a rolling material, and a rolling roll in the traveling direction of the metal plate 90. A pair of rolling devices 90 is included, including a winding device 4 provided on the inlet side of the 15 and 16 and a winding device 14 provided on the outlet side of the

rolling rolls

15 and 16 in the traveling direction of the metal plate 90. It is configured to be rolled by

rolls

15 and 16.

The rolling apparatus 2 shown in FIG. 2 is a rolling apparatus (reverse mill) for reciprocating and rolling a metal plate 90 between a pair of first rolling rolls 15A and 16A and a pair of second rolling rolls 15B and 16B. Is. The rolling apparatus 2 shown in FIG. 2 sandwiches the metal plate 90 with the first rolling mill 10A including a pair of first rolling rolls (work rolls) 15A and 16A provided so as to sandwich the metal plate 90 which is a rolling material. The second rolling mill 10B including the pair of second rolling rolls (work rolls) 15B and 16B provided in the above, and the unwinding device 4 provided on the inlet side of the first rolling rolls 15A and 16A in the traveling direction of the metal plate 90. And a take-up device 14 provided on the outlet side of the second rolling rolls 15B and 16B in the traveling direction of the metal plate 90, and the metal plate 90 is combined with the pair of first rolling rolls 15A and 16A and the pair of second rolling rolls 15A and 16A. It is configured to be rolled by rolling

rolls

15B and 16B.

The illustrated

rolling mills

10, 10A and 10B have the same configuration. The configuration of the rolling mill 10 will be described below, but the same description applies to the

rolling mills

10A and 10B. In FIG. 2, as the codes of the components (rolling rolls, etc.) of the

rolling mills

10A and 10B, the components of the rolling mill 10 shown in FIG. 1 are similarly coded with "A" or "B", respectively. Have been described.

In the rolling mill 10, in addition to the pair of rolling rolls (work rolls) 15 and 16, the pair of

intermediate rolls

17 and 18 provided on the opposite sides of the metal plate 90 with the pair of rolling rolls 15 and 16 sandwiched therein, and Includes a pair of backup rolls 19, 20 and. The intermediate rolls 17 and 18 and the backup rolls 19 and 20 are configured to support the rolling rolls 15 and 16. Further, the rolling mill 10 is provided with a rolling device 22 for applying a load to the pair of rolling rolls 15 and 16 to reduce the metal plate 90 sandwiched between the pair of rolling rolls 15 and 16. The reduction device 22 may include a hydraulic cylinder.

A motor (not shown) is connected to the rolling rolls 15 and 16 via a spindle (not shown) or the like, and the rolling rolls 5 and 16 are rotationally driven by the motor. When rolling the metal plate 90, the rolling rolls 15 and 16 are rotated by a motor while the metal plate 90 is rolled by the rolling device 22, so that a frictional force is generated between the rolling rolls 15 and 16 and the metal plate 90. The frictional force causes the metal plate 90 to be sent to the exit side of the rolling rolls 15 and 16.

The unwinding device 4 is configured to unwind the metal plate 90 toward the rolling mill 10. The take-up device 14 is configured to take up the metal plate 90 from the rolling mill 10. The unwinding device 4 and the winding device 14 are each driven by a motor (not shown).

The unwinding device 4 is configured to give an entry side tension to the metal plate 90 when the metal plate 90 is rolled. Further, the winding device 14 is configured to apply an exit tension to the metal plate 90 when the metal plate 90 is rolled. That is, by appropriately driving the unwinding device 4 and the winding device 14 by the motor, the metal plate 90 is given the entry side tension and the exit side tension. By appropriately applying the entry-side tension and the exit-side tension to the metal plate 90, meandering of the metal plate 90 during rolling can be suppressed.

When rolling is stopped immediately before the tail end of the metal plate 90 unwound from the unwinding device 4, and the odd-numbered (first pass, etc.) rolling is completed with the metal plate 90 being pressed by the rolling rolls 15 and 16. Next, the metal plate 90 is unwound from the winding device 14 toward the rolling mill 10, and the metal plate 90 is wound in the unwinding device 4 while advancing the metal plate 90 in the opposite direction to the previous direction. Then, the rolling is performed an even number of times (second pass, etc.). That is, the role of the unwinding device 4 and the role of the winding device 14 are switched according to the traveling direction of the metal plate 90.

The rolling apparatus 2 shown in FIGS. 1 and 2 includes an entry side pinch roll 6 and a side guide 8 for guiding the metal plate 90 introduced into the rolling mill 10 from the unwinding apparatus 4, and a winding apparatus from the rolling mill 10. Further includes an outlet pinch roll 12 for guiding the metal plate 90 sent to 14.

As shown in FIGS. 1 and 2, the control device 100 for controlling the rolling apparatus 2 is a first plate edge detecting unit 32 and a second plate for detecting the plate end position of the metal plate 90 in the plate width direction. It includes an edge detection unit 34 and a controller 40 configured to control the operation of the rolling apparatus 2 based on the detection results of the first plate end detection unit 32 and the second plate end detection unit 34.

The first plate edge detection unit 32 is provided on the entry side of the pair of rolling rolls 15 and 16 in the transport direction of the metal plate 90, and is located at the plate end position in the plate width direction of the metal plate at the first position Y1 in the transport direction. It is configured to detect a certain first plate end position x1. The second plate edge detecting unit 34 is provided on the exit side of the pair of rolling rolls 15 and 16 in the conveying direction, and is the second plate which is the plate end position in the plate width direction of the metal plate at the second position Y2 in the conveying direction. It is configured to detect the end position x2.

The control device 100 shown in FIG. 2 is provided with first plate

end detection units

32A and 32B on the entry side in the transport direction with respect to the first rolling rolls 15A and 16A and the second rolling rolls 15B and 16B, respectively. Second plate

edge detection units

34A and 34B are provided on the exit side in the transport direction.

The controller 40 receives signals indicating measurement results from the first plate edge detection unit 32 and the second plate edge detection unit 34, and drives the rolling device 22 and the rolling rolls 15 and 16 based on these measurement results. It is configured to control the operation of the motor.

The controller 40 may include a CPU, a memory (RAM), an auxiliary storage unit, an interface, and the like. The controller 40 receives signals from the first plate edge detection unit 32 and the second plate edge detection unit 34 via the interface. The CPU is configured to process the signal received in this way. Further, the CPU is configured to process a program expanded in the memory.

The processing content of the controller 40 may be implemented as a program executed by the CPU and stored in the auxiliary storage unit. When the programs are executed, these programs are expanded in memory. The CPU reads the program from the memory and executes the instructions included in the program.

FIG. 3 is a schematic configuration diagram of a controller 40 constituting the control device 100 according to the embodiment. As shown in FIG. 3, the controller 40 includes a determination unit 42 and a rolling control unit 44. The determination unit 42 includes the first plate end position x1 of the metal plate 90 detected by the first plate end detection unit 32 and the second plate end of the metal plate 90 detected by the second plate end detection unit 34. Based on the position x2, it is configured to determine whether or not the rolling of the metal plate 90 (tip non-tensile rolling) can be started by the pair of rolling rolls 15 and 16 in the state where the output tension of the metal plate 90 is zero. .. The rolling control unit 44 is configured to control the operation of the pair of rolling rolls 15 and 16. More specifically, the rolling control unit 44 is configured to control a motor for driving the rolling device 22 and the rolling rolls 15 and 16 in order to adjust the gap between the rolls of the rolling rolls 15 and 16 and the rotation speed. To.
Each part of the controller 40 other than the determination part 42 will be described later.

The control device 100 may further have a display unit (display or the like; not shown) for displaying the determination result by the determination unit 42.

Hereinafter, the operation control of the rolling apparatus 2 by the control device 100 will be described, but the rolling apparatus 2 may be operated by manually performing a part or all of the processing by the control device 100 described below.

4 and 16 are flowcharts showing an example of the operation method of the rolling apparatus 2 according to the embodiment, respectively. Note that FIGS. 4 and 16 are flowcharts showing an example of an operation method until the tip tensionless rolling of the metal plate 90 is started. The operation method after starting the tip tensionless rolling of the metal plate 90 will be described later with reference to the flowcharts of FIGS. 11, 14, and 17.
5A to 5C are schematic views showing the states of the rolling rolls 15 and 16 and the metal plate 90 when the tip tensionless rolling of the metal plate 90 is started, respectively. 6 and 7 are diagrams for explaining the determination of whether or not the tip tensionless rolling can be started by the determination unit 42, respectively.

In one embodiment, as shown in FIGS. 4 and 16, first, the controller 40 causes the gap between the pair of rolling rolls 15 and 16 (gap between rolls) to be larger than the thickness of the metal plate 90. The positions of the pair of rolling rolls 15 and 16 are adjusted (step S102). At this time, the position of the pair of rolling rolls 15 and 16 may be adjusted by operating the rolling device 22 as needed. Then, the tip portion (see FIG. 5A) including the tip 91 of the metal plate 90 is passed between the pair of rolling rolls 15 and 16 while maintaining the state where the gap between the rolls is larger than the plate thickness (step S104).

FIG. 5A is a schematic view showing the states of the rolling rolls 15 and 16 and the metal plate 90 when step S104 is completed. As shown in FIG. 5A, at the completion of step S104, the tip 91 of the metal plate 90 is held in a state where the gap d0 between the pair of rolling rolls 15 and 16 is larger than the plate thickness H0 of the metal plate 90 before rolling. The tip including the tip is passed between the rolling rolls 15 and 16. Further, the tip portion including the tip 91 of the metal plate 90 is located on the exit side of the rolling rolls 15 and 16, and does not reach the winding device 14. Therefore, the output tension Td acting on the metal plate 90 is zero. Further, at this point, since the entry side tension Te is not applied to the metal plate 90, the entry side tension Te is also zero.

After step S104 described above, tipless tension rolling of the metal plate 90 is started (step S112 in FIG. 4 or step S122 in FIG. 16).

In the embodiment according to the flowchart of FIG. 4, for example, as described below, it is determined whether or not the tip tensionless rolling of the metal plate 90 can be started (steps S106 to S108), and the tip tensionless rolling can be started. When it is determined, the tip non-tensile rolling of the metal plate 90 is started.

The above determination will be described with reference to the flowchart of FIG. First, the first plate end detection unit 32 is used to detect the first plate end position x1 at the first position Y1 in the transport direction, and the second plate end detection unit 34 is used to detect the second position Y2 in the transport direction. The second plate end position x2 in the above is detected (step S106).

Here, FIGS. 6 and 7 are schematic views of the rolling rolls 15 and 16 and the metal plate 90 before the start of rolling, respectively. As shown in FIGS. 6 and 7, the metal plate 90 has a plate width W, and has a first end edge 92 and a second end edge 93 which are both end edges in the plate width direction. In some embodiments, the first plate end detection unit 32 and the second plate end detection unit 34 have a first plate end position x1 and a second plate end position x2, respectively, as a first position Y1 and a second position Y2. It may be configured to detect the position of the first edge 92 in (see FIGS. 6 and 7). Alternatively, in another embodiment, the first plate end detection unit 32 and the second plate end detection unit 34 are set to the first plate end position x1 and the second plate end position x2, respectively, as the first position Y1 and the second position. It may be configured to detect the position of the second edge 93 in Y2.

Then, after step S106, the determination unit 42 determines whether or not the tip tensionless rolling of the metal plate 90 can be started based on the first plate end position x1 and the second plate end position x2 detected in step S106. (Step S108).

In step S108, for example, when the longitudinal direction of the metal plate 90 is substantially parallel to the conveying direction of the metal plate 90 by the rolling apparatus 2 (see FIG. 6), it is determined that the tip tensionless rolling of the metal plate 90 can be started. However, when the inclination of the metal plate 90 in the longitudinal direction with respect to the transport direction of the metal plate 90 is equal to or more than a specified degree (see FIG. 7), it is determined that the tip untensile rolling of the metal plate 90 cannot be started.

More specifically, in one embodiment, in step S108, when the difference | x1-x2 | between the first plate end position x1 and the second plate end position x2 is equal to or less than the threshold value Δx _th1 , the tip of the metal plate 90 determines that no tension rolling can be started, the difference | x1-x2 | when is greater than the threshold value [Delta] x _th1, determines that the tip no tension rolled metal plate 90 is started not.

Alternatively, in one embodiment, in step S108, the difference (x1-x _ref ) between the reference position x _ref and the first plate end position x1 in the plate width direction of the metal plate 90, and the reference position x _ref and the second plate. When each of the differences (x2-x _ref ) from the end position x2 is equal to or less than the threshold x _th2 , it is determined that the tip untensile rolling of the metal plate 90 can be started, and the above difference (x1-x _ref ) or (x1-x _ref ) or ( When at least one of x2-x _ref ) is larger than the threshold value x _th2, it is determined that the tip untensile rolling of the metal plate 90 cannot be started.

Here, the above-mentioned reference position x _ref is the plate width direction (that is, the rolling rolls 15 and 16) when the longitudinal direction of the metal plate 90 coincides with the transport direction by the rolling rolls 15 and 16 (rolling machine). It is a specified position in the axial direction (direction of the central axis O). The above-mentioned reference position x _ref may be, for example, the central position in the axial direction of the rolling rolls 15 and 16 (see FIGS. 6 and 7). In FIG. 6, the longitudinal direction of the metal plate 90 coincides with the transport direction by the rolling roll, and at this time, the position of the center line Lc along the longitudinal direction of the metal plate 90 is the above-mentioned plate width direction ( That is, it coincides with the reference position x _ref in the axial direction of the rolling rolls 15 and 16).

If it is determined in step S108 above that it is not possible to start the tip tensionless rolling of the metal plate 90 (No in step S108), the position of the metal plate 90 in the plate width direction is corrected (step S110), and the step again. Returning to S106, detection of the first plate end position x1 and the second plate end position x2 (step S106), and determination of whether or not to start the tip tensionless rolling of the metal plate 90 based on the detection result in step S106 (step). S108) is performed.

On the other hand, when it is determined in step S108 that the tip tensionless rolling of the metal plate 90 can be started (Yes in step S108), the rolling control unit 44 starts the tip tensionless rolling of the metal plate 90 (Yes). Step S112).

In step S112, the metal plate 90 is pressed by the pair of rolling rolls 15 and 16 in a state where the output tension Td applied to the metal plate 90 is zero, and the rotation of the pair of rolling rolls 15 and 16 is started to start the rotation of the metal. The tipless tension rolling of the plate 90 is started (see FIG. 5B).

When rolling down the metal plate 90 with a pair of rolling rolls 15 and 16, as shown in FIG. 5B, the rolling down device 22 is operated so that the gap between the rolls becomes a value d1 corresponding to the target plate thickness. The gap d1 between rolls at this point is smaller than the plate thickness H0 of the metal plate 90 before rolling. Further, at the start of rotation of the rolling rolls 15 and 16 and after the start of rotation, the rotation speed of the rolling rolls 15 and 16 is adjusted to an appropriate value by adjusting the current value of the motor for driving the rolling rolls 15 and 16. ..

When the tip tension rolling of the metal plate 90 is started, the metal plate 90 advances in the direction of the arrow shown in FIG. 5B. Then, as shown in FIG. 5C, in the metal plate 90 after the start of rolling, the portion of the metal plate 90 that is pressed by the rolling rolls 15 and 16 and advances to the exit side of the rolling rolls 15 and 16 is thicker than the plate thickness H0 before rolling. It has a thin plate thickness H1.

By performing non-tensile rolling at the tip of the metal plate 90 in this way, the tip of the metal plate 90 is compared with the case where the tip of the metal plate is wound around a winding device and rolling is started in a state where the outward tension is applied. Rolling can be started from a portion close to, and the yield of the metal plate 90 can be improved.

Then, as described above, after it was determined in step S108 that the tip tensionless rolling of the metal plate 90 was possible, the tip tensionless rolling was started by starting the tip tensionless rolling in step S112. The metal plate 90 can be appropriately wound by the winding device 14.

If the plate end position detection unit is provided only at one location on the exit side of the rolling rolls 15 and 16, the following problems may occur. That is, for example, as shown in FIG. 7, even if the longitudinal direction of the metal plate 90 is inclined with respect to the transport direction of the metal plate 90 by the rolling rolls 15 and 16 (rolling machine 10) before the start of rolling, the transfer is performed. From the plate end position detection result at only one point in the direction, it is unclear whether the longitudinal direction of the metal plate 90 is inclined with respect to the above-mentioned transport direction. In this case, when the tip tensionless rolling is started, the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 remains inclined with respect to the transport direction by the rolling mill 10. Therefore, the plate end position (for example, the second plate end position x2 in FIG. 7) detected by the plate end position detecting unit arranged on the exit side is substantially constant even after the start of rolling. Therefore, even if the control is performed based on the detected plate edge position, the inclination of the metal plate 90 with respect to the transport direction cannot be corrected, and if rolling is continued in this state, the tip of the metal plate 90 becomes the rolling mill 10. In some cases, the metal plate 90 after rolling cannot be properly wound by the winding device 14 because the metal plate 90 is separated from the conveying line in the plate width direction.

In this regard, according to the above-described embodiment, in step S106, in each of the first position Y1 on the entry side and the second position Y2 on the exit side of the pair of rolling rolls 15 and 16, the plate width direction of the metal plate 90 The plate edge position (first plate edge position x1 and second plate edge position x2) is detected. Therefore, based on these detection results, it is possible to grasp the degree of inclination of the metal plate 90 with respect to the transport direction in the longitudinal direction before the start of the tip tensionless rolling, that is, the metal plate at the start of the tip tensionless rolling. It is possible to grasp the degree of inclination of 90 with respect to the transport direction in the outflow direction. Then, in step S108, it is determined whether or not the tip tensionless rolling can be started based on the detection results of the first plate end position x1 and the second plate end position x2. Therefore, for example, based on the above detection result. When it is determined that the longitudinal direction of the metal plate 90 (that is, the outflow direction of the metal plate 90 at the start of rolling) is substantially parallel to the transport direction, the tipless tension rolling of the metal plate 90 can be started. Can be determined.

Therefore, according to the above-described embodiment, the tip tensionless rolling can be started in a state where the outflow direction and the transport direction of the metal plate 90 are substantially parallel, so that the tip portion of the metal plate 90 is a plate from the transport line by the rolling mill 10. It is possible to suppress the deviation in the width direction. Therefore, the rolled metal plate 90 can be easily wound appropriately by the winding device 14.

Further, according to the above-described embodiment, since the tip tensionless rolling can be started in a state where the outflow direction and the transport direction of the metal plate 90 are substantially parallel, the second plate end position x2 acquired at the start of the tip tensionless rolling. By using the above as a reference, it is possible to appropriately perform rolling leveling control of the rolling mill 10 such as meandering control of the metal plate 90 based on the position of the second plate end detected during tip tensionless rolling.

Therefore, it is possible to appropriately wind the metal plate 90 that has been rolled without tension at the tip by the winding device 14.

Further, in the case of the rolling equipment 1 including the two rolling mills 10 (first rolling mill 10A and second rolling mill 10B) shown in FIG. 2, the control device 100 is a pair of first rolling rolls 15A and 16A (first). It was determined whether or not the first tip tensionless rolling of the metal plate 90 in the rolling mill 10A) could be started, and it was determined that the first tip tensionless rolling could be started, and the pair of first rolling rolls 15A, After the tip tensionless rolling by 16A is started, it is configured to determine whether or not the second tip tensionless rolling of the metal plate 90 in the pair of second rolling rolls 15B and 16B can be started.
That is, the above-mentioned steps S102 to S112 are performed on the first rolling mill 10A, and when the tip tensionless rolling of the metal plate 90 is started, then the above-mentioned steps S102 to S112 are performed on the second rolling mill 10B. ..

In each of the first rolling rolls 15A and 16A (first rolling mill 10A) and the second rolling rolls 15B and 16B (second rolling mill 10B) arranged in the transport direction in this way, the tip tension is not applied in step S108. It was determined whether or not rolling could be started, and based on this determination result, tip tensionless rolling was started in step S112. Therefore, the metal plate 90 tip tensionless rolled by these rolling

rolls

15 and 16. The rolling rolls 15A and 16A and the pair of rolling

rolls

15B and 16B can be used for more efficient rolling while enabling the winding device to appropriately wind the rolling rolls.

On the other hand, in the embodiment according to the flowchart of FIG. 16, after the above step S104, the rolling control unit 44 starts the tip tensionless rolling of the metal plate 90 (see step S122, FIGS. 5A to 5C). Here, in step 122, at least the tip 91 of the metal plate 90 is at the second position Y2 on the exit side of the rolling rolls 15 and 16 (the second plate end detection unit 34 provided on the outlet side of the pair of rolling rolls 15 and 16). Rolling is performed at a rolling speed lower than the target rolling speed until the position detected by) is reached.

In this way, after the start of rolling of the metal plate 90, the tip tensionless rolling is performed at a speed lower than the target rolling speed in the tip tensionless rolling, so that the longitudinal direction of the metal plate 90 is maintained parallel to the transport direction. Therefore, it is possible to prevent the tip of the metal plate 90 from coming off the transfer line by the rolling mill 10 in the plate width direction. In the present embodiment, as compared with the embodiment according to the flowchart of FIG. 4, the second plate end position is detected without detecting the second plate end position x2 on the exit side of the rolling rolls 15 and 16 and correcting the plate end position. The metal plate 90 can be appropriately conveyed to the portion 34.

Further, as described above, since it is easy to maintain the longitudinal direction of the metal plate 90 parallel to the transport direction, it is based on the position of the metal plate 90 (second plate end position, etc.) detected during tip tensionless rolling. , The rolling control of the rolling mill 10 such as the meandering control of the metal plate 90 can be appropriately performed.

It is preferable that the first plate edge detection unit 32 and the second plate edge detection unit 34 are provided as close as possible to the rolling rolls 15 and 16 in the transport direction of the metal plate 90 by the rolling rolls 15 and 16. As a result, with the tip of the metal plate 90 placed near the rolling rolls 15 and 16, the first plate end detection unit 32 and the second plate end detection unit 34 use the first plate end position x1 and the second plate end position. x2 can be detected, and based on this detection result, rolling can be started with the tip 91 of the metal plate 90 placed near the rolling rolls 15 and 16, and the yield of the metal plate 90 is effective. This is because it can be improved.

In some embodiments, when the distance between the pair of rolling rolls 15 and 16 and the winding device 14 in the transport direction is L2 (see FIGS. 1 and 2), the pair of rolling rolls 15 and 16 and the second plate The distance Lb (see FIGS. 1 and 2) with the end detection unit 34 in the transport direction is 0.1 × L2 or less.

Here, the distance between the pair of rolling rolls 15 and 16 and the winding device 14 in the transport direction is the distance between the central axis O of the pair of rolling rolls 15 and 16 and the central axis of the winding device 14 in the transport direction. Is. The distance between the pair of rolling rolls 15 and 16 and the second plate end detection unit 34 in the transport direction is the central axis of the pair of rolling rolls 15 and 16 and the center position of the second plate end detection unit 34, or , The distance in the transport direction from the plate edge detection position (second position Y2) by the second plate edge detection unit 34. The direction of the central axis O of the rolling rolls 15 and 16, the direction of the central axis of the unwinding device 4, and the direction of the central axis of the winding device 14 are substantially parallel to each other.

In this way, since the distance Lb between the second plate end detection unit 34 and the rolling rolls 15 and 16 is relatively short in the transport direction, the tip 91 of the metal plate 90 at the start of non-tension rolling is rolled. Although it is relatively close, it is possible to detect the second plate end position x2 at the start of non-tensile rolling and during non-tensile rolling. Therefore, the tip non-tension rolling can be appropriately performed while shortening the length of the unrolled tip portion of the metal plate 90, whereby the yield of the metal plate 90 can be effectively improved.

In some embodiments, when the distance between the pair of rolling rolls 15 and 16 and the unwinding device 4 in the transport direction is L1 (see FIGS. 1 and 2), the pair of rolling rolls 15 and 16 and the first plate The distance La in the transport direction with the end detection unit 32 is 0.1 × L1 or less.

Here, the distance L1 in the transport direction between the pair of rolling rolls 15 and 16 and the unwinding device 4 is the distance L1 in the transport direction between the central axis O of the pair of rolling rolls 15 and 16 and the central axis of the unwinding device 4. The distance. The distance between the pair of rolling rolls 15 and 16 and the first plate end detection unit 32 in the transport direction is the central axis O of the pair of rolling rolls 15 and 16 and the center position of the first plate end detection unit 32. Alternatively, it is the distance in the transport direction from the plate edge detection position (first position Y1) by the first plate edge detection unit 32.

In the case of a rolling apparatus (reverse mill) in which the metal plate 90 passed between the pair of rolling rolls 15 and 16 is reciprocated and rolled, the transport direction of the metal plate 90 is reversed in the second pass after the first pass is completed. , Rolling on the rolling rolls 15 and 16 is started from the rear end side of the metal plate 90. In this regard, according to the above-described embodiment, the distances between the first plate edge detection unit 32 and the rolling rolls 15 and 16 are compared in the transport direction in the second pass (opposite to the transport direction in the first pass). Since the length was shortened, the rear end position of the metal plate 90 at the start of the second pass of non-tensile rolling was set relatively close to the rolling roll, and the first plate end position x1 was set at the start of non-tension rolling and during non-tension rolling. Can be detected. Therefore, the tip tensionless rolling can be appropriately performed while shortening the length of the rear end portion of the metal plate 90 that is not rolled, and thereby the yield of the metal plate 90 can be improved.

In some embodiments, the rolling mill 1 is provided on at least one of the entry and exit sides of the pair of rolling rolls 15 and 16 in the transport direction and is configured to measure the thickness of the metal plate 90. Equipped with a plate thickness gauge. The first plate edge detection unit 32 or the second plate edge detection unit 34 is located between the pair of rolling rolls 15 and 16 and the plate thickness gauge in the transport direction.

In the embodiment shown in FIGS. 1 and 2, a plate thickness meter 36 is provided on the entry side of the pair of rolling rolls 15 and 16 in the transport direction, and the first plate end detection unit 32 is paired in the transport direction. It is located between the rolling rolls 15 and 16 of the above and the plate thickness meter 36. Further, in the embodiment shown in FIGS. 1 and 2, a plate thickness meter 38 is provided on the exit side of the pair of rolling rolls 15 and 16 in the transport direction, and the second plate end detection unit 34 is provided in the transport direction. It is located between the pair of rolling rolls 15 and 16 and the plate thickness meter 38.

The plate thickness gauges 36 and 38 used to control the plate thickness of the metal plate 90 are preferably provided near the rolling rolls 15 and 16 in the transport direction in order to improve the control response. In this regard, according to the above-described embodiment, the first plate end detection unit 32 is closer to the rolling rolls 15 and 16 in the transport direction than the plate thickness gauges 36 and 38 for measuring the plate thickness of the metal plate 90. Alternatively, since the second plate end detection unit 34 is provided, the tip position of the metal plate 90 at the start of non-tensile rolling is brought closer to the rolling rolls 15 and 16, and the first plate is at the start of non-tensile rolling and during non-tensile rolling. It is possible to detect the end position x1 or the second plate end position x2. Therefore, it is possible to appropriately perform the tip tensionless rolling while shortening the length of the unrolled tip portion of the metal plate, thereby improving the yield of the metal plate.

In some embodiments, the first plate edge detector 32 or the second plate edge detector 34 uses radiation (eg, X-rays or gamma rays) to detect the first plate edge position x1 or the second plate edge position x2. It is configured to do.

In the vicinity of the rolling rolls 15 and 16, a large amount of rolling oil and fume are scattered, and the rolling rolls 15 and 16 vibrate, which is often a harsh environment such as darkness. In this regard, according to the above-described embodiment, since the first plate edge detection unit 32 or the second plate edge detection unit 34 that detects the plate edge position by using radiation is used, the rolling roll in a harsh environment. Even if it is arranged in the vicinity of 15 and 16, the plate edge position can be appropriately detected.

FIG. 8 is a schematic view showing a partial cross section of the metal plate 90 rolled by the rolling equipment 1 according to the embodiment, including the plate width direction and the longitudinal direction. As shown in FIG. 8, the metal plate 90 has a first surface 94 located on the rolling roll 15 side in the plate thickness direction and a second surface 95 located on the rolling roll 16 side in the plate thickness direction.
9 and 10 are graphs showing an example of a graph showing the relationship between the gap between the pair of rolling rolls 15 and 16 (gap between rolls) and the time in the period including the start of rolling of the metal plate 90, respectively. is there.

In some embodiments, when the rolling control unit 44 of the controller 40 determines in step S108 above that the tip-less tension rolling of the metal plate 90 can be started by the determination unit 42, in step S120 described above. , The pair of rolling rolls 15 and 16 are brought into contact with the metal plate 90 (time t0 in FIG. 9). At this point, the metal plate 90 has not been rolled down yet, and the contact position between the rolling rolls 15 and 16 and the metal plate 90 (the position of the central axis O of the rolling rolls 15 and 16 in the transport direction) is higher than that of the tip 91. The

positions

94a and 95a on the wake side (see FIG. 8), and the plate thickness at these

positions

94a and 95a is H0 (initial value). After that, while rotating the pair of rolling rolls 15 and 16, the pair of rolling rolls 15 are conveyed to the

positions

94b and 95b on the wake side of the

above positions

94a and 95a (see FIG. 8) as the metal plate 90 is conveyed. The number of rotations and the amount of rolling of the pair of rolling rolls 15 and 16 are adjusted so that the gap between 16 and 16 gradually decreases until the control value dc corresponding to the target plate thickness Hc of the metal plate 90 is reached (FIG. 9). Times t1 to t2). After time t2, the inter-roll gap is maintained at the control value dc corresponding to the target plate thickness Hc so that the plate thickness of the metal plate 90 that has passed through the rolling rolls 15 and 16 becomes the target plate thickness Hc.

As a result, the portion of the metal plate 90 including the tip 91 has a shape shown by a solid line in FIG. That is, the metal plate 90 includes the tip 91, the tip portion 90a having a plate thickness of H0, the succeeding portion 90c whose plate thickness is maintained at the target plate thickness Hc, and the tip portion 90a in the longitudinal direction of the metal plate. It has a transition portion 90b located between the and the succeeding portion 90c. In the transition portion 90b, the plate thickness gradually decreases from H0 to Hc from the

positions

94a and 95a to the

positions

94b and 95b.

With the tip of the metal plate 90 (the portion indicated by reference numeral 90a in FIG. 8) passed between the pair of rolling rolls 15 and 16, the rolling rolls 15 and 16 start rolling the metal plate 90 under pressure and no-tension rolling at the tip. In this case, the difference in plate thickness between the tip portion 90a that is not rolled by the rolling rolls 15 and 16 and the subsequent portion 90c that is rolled may be large in the metal plate 90. For example, as shown in FIG. 10, the gap between the pair of rolling rolls 15 and 16 is narrowed to the control value dc corresponding to the target plate thickness Hc (time t1 in FIG. 10), and the rolling rolls 15 and 16 are in that state. When the rotation of No. 16 is started (time t1 in FIG. 10), the shape of the metal plate 90 changes to the tip portion 90a ahead of the

positions

94a and 95a where rolling is started, as shown by the alternate long and short dash line in FIG. The plate thickness is H0) and the subsequent portion 90c (plate thickness is Ht) behind the above-mentioned

positions

94a and 95a, and the plate thickness changes abruptly.

In this case, when the metal plate 90 is wound by the winding device 14, stress may be concentrated on the boundary between the tip portion 90a and the succeeding portion 90c, and the metal plate 90 may be cut at this boundary. is there.

In this regard, in the above-described embodiment, at the start of tension-free rolling at the tip of the metal plate 90, the pair of rolling rolls 15 and 16 are brought into contact with the metal plate 90, and then the metal plate 90 is rotated while the rolling rolls 15 and 16 are rotated. The number of rotations and the amount of rolling of the rolling rolls 15 and 16 are adjusted so that the gap between the rolling rolls 15 and 16 gradually decreases until the control value dc corresponding to the target plate thickness Ht of the metal plate 90 is reached. To do. Therefore, a transition portion 90b (see FIG. 8) in which the plate thickness gradually decreases is formed between the tip portion 90a having the same plate thickness H0 as before rolling and the succeeding portion 90c rolled to the target plate thickness Hc. To. Therefore, it is possible to alleviate the stress concentration that may occur at the boundary between the tip portion 90a and the successor portion 90c described above when the metal plate is wound by the winding device 14. As a result, the rolled metal plate 90 can be more appropriately wound by the winding device 14.

In some embodiments, as described above, as the metal plate 90 is conveyed, the gap between the pair of rolling rolls 15 and 16 gradually decreases until it reaches the control value dc corresponding to the target plate thickness Hc of the metal plate 90. The inclination angle α1 of the first surface 94 in the above-mentioned transition portion 90b with respect to the longitudinal direction of the metal plate 90 or the inclination angle α2 of the second surface 95 in the above-mentioned transition portion 90b with respect to the longitudinal direction of the metal plate 90 is 20. The rotation speed and the reduction amount of the pair of rolling rolls 15 and 16 are adjusted so as to be less than or equal to the degree.

As a result, the plate thickness change in the transition portion 90b (see FIG. 8) does not become too rapid, so that the boundary between the tip portion 90a and the succeeding portion 90c described above when the metal plate is wound by the winding device 14 or the like. The stress concentration that may occur can be effectively relaxed, and the rolled metal plate 90 can be wound more appropriately by the winding device 14.

Next, in order to execute the operation method of the rolling apparatus 2 (the portion following the flowchart of FIG. 4 or FIG. 16) after starting the tip tensionless rolling of the metal plate 90 and the operation method as described above. The configuration of the control device 100 of the rolling equipment 1 of the above will be further described.

In some embodiments, the control device 100 rolls the metal plate 90 with a pair of rolling rolls 15 and 16 (i.e., the tip of the metal plate 90) with no output tension applied to the metal plate 90. It is provided with a detection unit configured to detect the plate end position x _B in the plate width direction of the metal plate 90 at the position on the exit side of the pair of rolling rolls 15 and 16 (while performing non-tensile rolling). In the embodiment shown in FIGS. 1 and 2, the second plate end detection unit 34 provided on the exit side of the rolling rolls 15 and 16 functions as the above-mentioned detection unit.

Further, in some embodiments, the controller 40 (see FIG. 3) of the control device 100 includes a first leveling unit 46 and a second leveling unit 48.

In the first leveling unit 46, the detection result of the plate end position by the second plate edge detection unit 34 (hereinafter, also simply referred to as “second plate edge detection unit 34”) as the above-mentioned detection unit is the plate width from the reference position. When deviated to one side of the direction (one side of the first edge 92 or the second edge 93; see FIG. 12A, etc.), the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 is the metal plate in the rolling apparatus 2. It is configured to control the rolling leveling of the pair of rolling rolls 15 and 16 along the conveying direction of 90.

After the reduction leveling control by the first leveling portion 46, the second leveling portion 48 makes the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 the other side (first end edge 92) in the plate width direction with respect to the transport direction. Alternatively, after shifting to the other side of the second edge 93 (see FIG. 12A, etc.), the rolling rolls 15 and 16 are configured to perform rolling leveling control so that the outflow direction of the metal plate 90 returns to the transport direction. Will be done.

In the above-mentioned control device 100, while rolling the metal plate 90 in a state where the tip is not tensioned, the second plate end detection unit 34 (detection unit) causes the metal plate 90 to be positioned on the exit side of the rolling rolls 15 and 16. Since the plate end position x _B in the plate width direction is detected, the detected plate end position x _B deviates from the reference position to one side in the plate width direction, and the metal plate 90 is in the outflow direction. It is possible to detect that a deviation (bending of the tip of the metal plate 90) to one side in the plate width direction has occurred. Then, when the bending of the tip of the metal plate 90 is detected, the outflow direction of the metal plate 90 is aligned with the transport direction of the metal plate 90 in the rolling apparatus 2 by the reduction leveling control by the first leveling portion 46, and then the second By rolling down leveling control by the leveling unit 48, the outflow direction of the metal plate 90 was shifted to the other side in the plate width direction with respect to the transfer direction, and then the outflow direction of the metal plate 90 was made to follow the transfer direction. The tip bending of the metal plate 90 is corrected, and the tip tensionless rolling can be continued in a state where the tip edge (tip 91) of the metal plate 90 is brought close to parallel to the axial direction of the winding device 14. Therefore, according to the above configuration, the metal plate 90 that has been rolled without tension at the tip can be appropriately wound by the winding device 14.

Further, in some embodiments, the controller 40 may include at least one of an elongation difference calculation unit 50, a deviation angle calculation unit 52, or a remaining time calculation unit 54.

In the elongation difference calculation unit 50, after the plate end position x _B detected by the second plate end detection unit 34 is separated from the reference position toward the one side, the plate end position x is controlled by the first leveling unit 46 under reduction leveling. _It is configured to calculate the first elongation difference d1 on the other side of the metal plate 90 until _B returns to the reference position with respect to the one side.

The deviation angle calculation unit 52 acquires the first deviation angle θ1 to the one side with respect to the transport direction in the outflow direction of the metal plate 90 at the start of the reduction leveling control by the first leveling unit 46, and the first deviation angle θ1. Based on this, it is configured to determine the second deviation angle θ2 to the other side with respect to the transport direction in the outflow direction of the metal plate 90 during execution of the reduction leveling control by the second leveling unit.

The remaining time calculation unit 54 is configured to calculate the remaining time Tc until the tip 91 of the metal plate 90 reaches the winding device 14 provided on the downstream side of the pair of rolling rolls 15 and 16.

Hereinafter, the operation method of the rolling apparatus 2 by the control apparatus 100 according to some embodiments will be described with reference to FIGS. 1 to 3, 11 to 15 and 17, but the control apparatus 100 described below will be described. The rolling apparatus 2 may be operated by manually performing a part or all of the processing according to the above.

11, 14 and 17 are flowcharts showing an example of the operation method of the rolling apparatus 2 according to the embodiment, respectively. 12A to 12D are diagrams showing state transitions of the metal plate 90 when the rolling apparatus 2 is operated based on the flowchart shown in FIG. FIG. 13 is a graph for explaining an example of a method for calculating the first elongation difference and the second elongation difference of the metal plate 90. In this graph, the horizontal axis represents time and the vertical axis represents the deviation amount Δe described later. Is shown. 15A to 15D are diagrams showing state transitions of the metal plate 90 when the rolling apparatus 2 is operated based on the flowchart shown in FIG.

In the embodiment according to the flowchart shown in FIGS. 11 and 17, first, the metal plate 90 is rolled by a pair of rolling rolls 15 and 16 (that is, metal) in a state where the output tension applied to the metal plate 90 is zero. (While performing non-tensile rolling at the tip of the plate 90), using the second plate end detection unit 34, the positions of the exit sides of the pair of rolling rolls 15 and 16 (“extrusion side plate edge detection positions” shown in FIGS. 12A to 12D”. ), The plate edge position x _B in the plate width direction of the metal plate 90 is detected (step S202; detection step). Further, in the embodiment according to the flowchart shown in FIG. 17, while performing tensionless rolling at the tip of the metal plate 90, the positions on the entry sides of the pair of rolling rolls 15 and 16 are used by using the first plate end detection unit 32 (FIG. 17). The plate edge position x _A in the plate width direction of the metal plate 90 is detected at the “entry side plate edge detection position” shown in 12A to 12D (step S203). In the graph of FIG. 13, the time t20 is the time when the tip tensionless rolling of the metal plate 90 is started.

Next, the amount of deviation Δe of the plate end position x _B detected in step S202 from the reference position in the plate width direction to one side in the plate width direction (one side of the first end edge 92 or the second end edge 93). (Step S204), and the calculated deviation amount Δe is compared with the threshold value Δe_th (step S206).

Here, the reference position is a specific position in the plate width direction when the longitudinal direction of the metal plate 90 is parallel to the transport direction by the rolling apparatus 2 (the direction orthogonal to the central axes of the rolling rolls 15 and 16). Is. In some embodiments, the position of the first edge 92 of the metal plate 90 when the longitudinal direction of the metal plate 90 is parallel to the transport direction by the rolling apparatus 2 may be used as a reference position (see FIGS. 12A to 12D). Good. Further, in the embodiment including the step of detecting the plate end position at the entry side position of the pair of rolling rolls 15 and 16 (step S203 of FIG. 17) as in the flowchart of FIG. 17, the plate end position (for example, The plate edge position x _A ) detected by the first plate edge detection unit 32 may be used as the above-mentioned reference position. The center position (position of the center line Lc) in the plate width direction of the metal plate 90 when the longitudinal direction of the metal plate 90 is parallel to the transport direction by the rolling apparatus 2 may be set as the “reference position”.

In the stage shown in FIG. 12A, the reference position and the plate edge position x _B coincide with each other in the plate width direction, and the deviation amount Δe calculated in step S204 is zero. Therefore, in step S206, it is determined that the deviation amount Δe is smaller than the threshold value (NO in step S206), the process returns to step S202, and the plate edge position x _B is detected again by the second plate edge detection unit 34.

FIG. 12B shows a stage in which the tip of the metal plate 90 is bent due to some disturbance (for example, unevenness of the plate thickness in the plate width direction of the metal plate 90) from the state shown in FIG. 12A. In the example shown in FIG. 12B, the plate end position x _B detected in step S202 deviates from the reference position to the first end edge 92 side (one side) in the plate width direction. That is, the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 is deviated to the first edge 92 side (one side) in the plate width direction with respect to the transport direction by the rolling rolls 15 and 16. At this time, the deviation amount Δe calculated in step S204 becomes larger than zero. In the graph shown in FIG. 13, the deviation amount Δe starts to become larger than zero at time t21, and the deviation amount Δe becomes maximum (state shown in FIG. 12B) at time t23.

When the deviation amount Δe calculated in step S204 is equal to or less than the threshold value Δe_th (NO in step S206), the process returns to step S202, and the plate edge position x _B is detected again by the second plate edge detection unit 34 (NO in step S206). Note that S222 and S224 in the flowchart of FIG. 17 will be described later). On the other hand, when the deviation amount Δe calculated in step S204 becomes larger than the threshold value Δe_th (YES in step S206, time t23 in the graph of FIG. 13), the rolling mill 22 so that the deviation amount Δe becomes zero in step S208. The leveling of the rolling rolls 15 and 16 is controlled according to the above (step S208). That is, in step S208, rolling leveling control of the pair of rolling rolls 15 and 16 is performed so that the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 follows the transport direction of the metal plate 90 in the rolling apparatus 2. 1 leveling step). FIG. 12C is a diagram showing a stage at the end of step S208 (when the above-mentioned deviation amount Δe becomes zero; time t24 in the graph of FIG. 13).

Next, after the plate end position x _B detected by the second plate edge detection unit 34 is separated from the reference position toward the one side (here, the first end edge 92 side) in the plate width direction (in FIG. 12B). (Shown state), the metal plate until the plate end position x _B detected by the second plate edge detection unit 34 in the first leveling step (step S208) described above returns to the reference position (until the state shown in FIG. 12C is reached). The first elongation difference E1 relative to the one side (first edge 92 side) on the other side (here, the second edge 93 side) of 90 is calculated (step S210; elongation difference calculation step). Here, in the examples shown in FIGS. 12B and 12C, the elongation of the metal plate 90 on the second edge 93 side is E1, while the elongation of the metal plate 90 on the first edge 92 side is zero. Therefore, the above-mentioned first elongation difference is E1.

In the elongation difference calculation step (step S210), after the plate end position x _B detected by the second plate end detection unit 34 is separated from the reference position toward one side (here, the first end edge 92 side) (FIG. time t21 graph 13), a plate edge position x _B in the first leveling step is returned to the reference position (up to time t24) in the graph of FIG. 13, the time shift amount Δe of the plate edge position x _B integral with respect to the reference position The first elongation difference E1 is calculated based on (area S _{1B'shown in} Graph FIG. 13). Here, the first elongation difference E1 can be calculated based on the area S _{1B'shown in} FIG. 13, because the triangle indicated by the reference numeral S _1A in FIG. 12B and the triangle indicated by the reference numeral S _1B are similar to each other. the area _{S 1B 'of} the graph of a triangle and 13 indicated by reference numeral _{S 1B} in 12B, is because there is a certain correlation.

Next, the remaining time Tc until the tip 91 of the metal plate 90 reaches the winding device 14 provided on the downstream side of the pair of rolling rolls 15 and 16 is calculated (step S212; remaining time calculation step). The starting point of the remaining time Tc is, for example, the time when the above-mentioned deviation amount Δe becomes zero in the first leveling step (the end time of step S208; the time t24 in the graph of FIG. 13), or the start of the second leveling step. It may be a time point (the start time point of steps S214 to S218 described later; time t25 in the graph of FIG. 13). In the graph of FIG. 13, the time from the start time (time t25) of the second leveling step to the time t27 is the remaining time Tc. The remaining time Tc can be calculated based on the distance between the tip 91 of the metal plate 90 and the winding device 14, and the transport speed of the metal plate 90.

Next, after shifting the outflow direction of the metal plate 90 from the rolling rolls 15 and 16 to the other side (here, the second end edge 93 side) in the plate width direction with respect to the transport direction, the outflow direction of the metal plate 90 is changed. The reduction leveling control of the pair of rolling rolls 15 and 16 is performed so as to return to the transport direction (steps S214 to S218; second leveling step). Here, FIG. 12D shows a state at the time when the second leveling step is completed (that is, a state at the end of step S218).

In step S214, the drive motors of the reduction device 22 and the rolling rolls 15 and 16 are provided so as to give the metal plate 90 a second elongation difference E2 (see FIG. 12D) having a magnitude equal to that of the first elongation difference E2 within the remaining time Tc. Calculate the control command value for. Here, the second elongation difference E2 is a second elongation difference relative to the other side (here, the second end edge 93 side) on the one side (here, the first end edge 92 side) of the metal plate 90. is there.

That is, by performing the second leveling step, as shown in FIGS. 12D and 13, the plate end position x _B shifts to the second edge 93 side, and a shift amount Δe occurs. As time integral value of Δe in the second edge 93 side (the area _{S 2B} in the graph of FIG. 13 ') is, the area _{S 2A} in the graph of FIG. 13' becomes equal to, leveling of the rolling rolls 15 and 16 control by performing, as a triangle indicated by symbol S _2B in FIG. 12D are formed, it is possible to provide a second differential expansion E2 (see FIG. 12D) with respect to the metal plate 90. This is because the triangle indicated by the symbol S _2B in FIG. 12D and the area S _2B'of the graph of FIG. 13 have a specific correlation, and the triangle indicated by the reference numeral S _2A and the triangle indicated by the reference numeral S _2B in FIG. 12D have a specific correlation. This is because is similar to.

In step S216, the leveling control of the rolling rolls 15 and 16 is performed based on the control command value calculated in step S214. The control of step S216 is repeated while the difference | E1-E2 | between the first elongation difference E1 and the second elongation difference E2 does not fall within the specified range (NO in step S218). Then, when the above difference | E1-E2 | is within the specified range (YES in step S218), the bending of the tip of the metal plate 90 detected in steps S202 to S206 has been corrected. Returning to S202, the tip bending of the metal plate 90 that may occur next is detected.

The first elongation difference E1 caused by the bending of the tip of the metal plate 90 indicates the magnitude of the deviation of the metal plate 90 to one side in the plate width direction in the outflow direction. In this regard, according to the above-described embodiment, the first elongation difference E1 caused by the bending of the tip of the metal plate 90 is calculated, and the above-mentioned second elongation difference E2 is rolled so as to be equal to the above-mentioned first elongation difference E1. Rolling down leveling control of

rolls

15 and 16 is performed. That is, the elongation (second elongation) equal to the elongation (elongation corresponding to the first elongation difference E1) generated on one end side (here, the first end edge 92 side) of the metal plate 90 due to the bending of the tip of the metal plate 90. Since the reduction leveling control is performed so as to give the elongation corresponding to the difference E2 to the other end side of the metal plate 90 (here, the second end edge 93 side), the bending of the tip of the metal plate 90 is appropriately corrected. However, the tip edge (tip 91) of the metal plate 90 can be brought close to parallel to the axial direction of the winding device 14. Therefore, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

Further, the above-mentioned first elongation difference E1 generated in the metal plate 90 due to the bending of the tip of the metal plate 90 has a correlation with the time integration of the deviation amount Δe of the plate end position x _{B with} respect to the above-mentioned reference position, and is typically Has a proportional relationship between the first elongation difference E1 and the time integration of the above-mentioned deviation amount Δe. In this regard, according to the above-described embodiment, the first elongation difference E1 can be appropriately calculated based on the time integration of the above-mentioned deviation amount Δe. Therefore, in the second leveling step, the tip bending of the metal plate 90 is appropriately performed by performing the reduction leveling control so as to give the metal plate 90 a second elongation difference E2 equal to the first elongation difference E1 calculated in this way. It can be corrected.

Further, in the above-described embodiment, after the tip of the metal plate 90 is bent, the remaining time Tc until the tip 91 of the metal plate 90 reaches the winding device 14 is calculated, and the second remaining time Tc is within the calculated remaining time Tc. Since the elongation difference E2 is given to the metal plate 90, the bending of the tip of the metal plate 90 can be appropriately corrected before the metal plate 90 starts winding.

In one embodiment, the rolling speed may be adjusted as follows when performing tipless tension rolling. The rolling speed may be adjusted by the rolling control unit 44.

For example, in the flowchart of FIG. 17, in step S206, as a result of comparing the deviation amount Δe of the plate end position x _B from the reference position in the plate width direction to one side in the plate width direction and the threshold value Δe_th, the deviation amount Δe is the threshold value Δe_th. When the following (NO in step S206; that is, when the longitudinal direction of the metal plate 90 is substantially parallel to the transport direction), the rolling speed of the metal plate 90 is set to the target rolling speed in the preset tip tensionless rolling. Compare (step S222). Here, the rolling speed of the metal plate 90 may be the transport speed in the transport direction of the metal plate 90. Alternatively, the rolling speed may be the rotation speed of the rolling rolls 15 and 16.

When the rolling speed is equal to or higher than the above-mentioned target rolling speed (NO in step S222), the process returns to step S202 without changing the rolling speed. On the other hand, when the rolling speed is less than the above-mentioned target rolling speed (YES in step S222), the rolling speed is increased so that the rolling speed approaches the target rolling speed (S224), and then the process returns to step S202.

The adjustment of the rolling speed during such tip tensionless rolling is described, for example, with reference to FIG. 16, that is, at a rolling speed lower than the target rolling speed after the start of tip tensionless rolling of the metal plate 90. It may be applied when rolling is performed.

In this way, the productivity of the rolling apparatus 2 can be improved by appropriately increasing the rolling speed during tip tensionless rolling.

In the embodiment according to the flowchart shown in FIGS. 11 and 12, the first elongation difference E1 is calculated based on the time integration of the amount of deviation Δe of the detected plate edge position x _B with respect to the reference position, and the first elongation difference E1 is calculated. The reduction leveling of the rolling rolls 15 and 16 was controlled based on E1. On the other hand, in the embodiment according to the flowchart of FIG. 14, the reduction leveling control of the rolling rolls 15 and 16 is controlled based on the deviation angle of the metal plate 90 with respect to the transport direction in the outflow direction when the tip of the metal plate 90 is bent. I do. More specifically, in the embodiment according to the flowchart of FIG. 14, the first to one side (here, the first edge 92 side) of the metal plate 90 with respect to the transport direction in the outflow direction at the start of the first leveling step. Based on the deviation angle θ1 (see FIG. 15B), the second deviation angle θ2 (see FIG. 15C) to the other side (here, the second edge 93 side) with respect to the transport direction in the outflow direction during the execution of the second leveling step. decide.

In the flowchart of FIG. 14, the contents of steps S302, S304, S306, S312, S316, and S318 are the same as those of steps S202, S204, S206, S212, S216, and S218 shown in FIG. 11, so detailed description thereof will be omitted.

In the embodiment according to the flowchart shown in FIG. 14, when the deviation amount Δe calculated in step S304 based on the plate edge position x _B detected in step S302 (detection step) is larger than the threshold value (YES in step S306), this The first deviation angle θ1 (here, the first edge 92 side) with respect to the transport direction of the outflow direction of the metal plate 90 at the time point (the start time of the first leveling step; the step shown in FIG. 15B). 15B) is acquired (step S308). The first deviation angle θ1 may be acquired based on the deviation amount Δe and the distance m between the central axes O of the rolling rolls 15 and 16 in the transport direction and the plate edge detection position by the second plate edge detection unit 34 (tan θ1). = Δe / m). Alternatively, the first deviation angle θ1 may be acquired based on the image captured by an imaging device or the like.

Next, based on the first deviation angle θ1 acquired in step S308, the second deviation angle θ2 to be given to the metal plate 90 in the second leveling step, that is, the other side of the metal plate 90 with respect to the transport direction in the outflow direction ( Here, the second deviation angle θ2 with respect to the second edge 93 side) is determined (step S310; see FIG. 15C).

Then, within the remaining time Tc calculated in step S312, the rolling element 22 such that the deviation angle of the metal plate 90 toward the other side (here, the second end edge 93 side) becomes the above-mentioned second deviation angle θ2. And the control command value for the drive motor of the rolling rolls 15 and 16 is calculated (step S314). Then, based on the control command value calculated in this way, the leveling control (first leveling step and second leveling step) of the rolling rolls 15 and 16 is performed (step S316). Then, when the deviation angle of the metal plate 90 toward the other side (here, the second end edge 93 side) becomes the above-mentioned second deviation angle θ2 (YES in step S318), the metal plate detected in steps S302 to S306. Since the tip bending of the 90 has been corrected, the process returns to step S302 again to detect the tip bending of the metal plate 90 that may occur next.

The first deviation angle θ1 with respect to the transport direction of the metal plate 90 in the outflow direction (here, the first end edge 92 side) caused by the bending of the tip of the metal plate 90 is the same as the above-mentioned first elongation difference E1. The magnitude of the deviation of the metal plate 90 toward one side (first end edge 92 side) in the plate width direction in the outflow direction is shown. In this respect, in the above-described embodiment, the second deviation angle θ2 to the other side with respect to the transport direction in the outflow direction during the execution of the second leveling step can be appropriately determined based on the above-mentioned first deviation angle θ1. .. Therefore, by performing the reduction leveling control so as to give the second deviation angle θ2 determined in this way to the metal plate 90, the tip bending of the metal plate 90 is appropriately corrected, and the tip edge of the metal plate 90 is wound. It can be brought close to parallel to the axial direction of the picking device 14. Therefore, the metal plate 90 that has been rolled without tension at the tip can be appropriately wound by the winding device 14.

The second deviation angle θ2 determined in step S310 may be given to the metal plate 90 at once in the second leveling step of step S316 (see FIG. 15C), or may be divided into a plurality of times. , May be given to the metal plate 90 (see FIG. 15D). In FIG. 15D, the angle θ2a is given for the first time, the angle θ2b for the second time, and the angle θ2c for the third time as the deviation angle of the metal plate 90 toward the other side (second end edge 93 side). Here, the sum of θ2a, θ2b, and θ2c is θ2 (θ2a + θ2b + θ2c = θ2).

In this case, a small amount of the second deviation angles θ2a, θ2b and θ2c is provided as compared with the case where a large second deviation angle θ2 is given to the other side (second end edge 93 side) of the metal plate 90 at one time (see FIG. 15C). Since it is divided and given to the metal plate 90, the bending of the tip of the metal plate 90 can be corrected more stably.

In some embodiments, after the completion of the first leveling step, the second leveling step is started within a time equal to or less than the time required for the first leveling step.

For example, in the embodiment described with reference to FIGS. 11 to 12D, the time required for the first leveling step (from the YES determination in step S206 in FIG. 11 to the end time in step S208) is shown in the graph of FIG. It is from time t22 to time t24. The time from the end of the first leveling step to the start of the second leveling step is from time t24 to t25 in the graph of FIG. 13, which is shorter than the time required for the first leveling step described above.

Further, in the embodiment described with reference to FIGS. 14 to 15D, the first leveling step and the second leveling step are performed without distinction (continuously) in step S316, and after the completion of the first leveling step, the second leveling is performed. The time to the start of the step is substantially zero, and the first leveling step (from the outflow direction of the metal plate 90 to one side (first end edge 92 side) to the return to the same direction as the transport direction). It is less than the required time.

In this case, after the outflow direction of the metal plate 90 is aligned with the transport direction in the first leveling step, the second leveling step is started within the time required for the first leveling step, and the metal plate 90 is started. The outflow direction is shifted to the other side (second end edge 93 side). That is, after the completion of the first leveling step, the outflow direction of the metal plate 90 is shifted to the other side (second end edge 93 side) without much time, so that the metal plate 30 at the end of the second leveling step The amount of deviation in the plate width direction (Δd shown in FIG. 12D) between the center position in the plate width direction at the tip bending portion and the center position in the plate width direction of the metal plate 90 on the rolling rolls 15 and 16 can be reduced. (In other words, the area of the rectangular portion A1 shown in FIGS. 12C and 12D can be made as small as possible.) For example, as shown in FIG. 15C, the first leveling step and the second leveling step are continuously performed. As a result, the above-mentioned deviation amount Δd becomes almost zero. Therefore, the metal plate 90 that has been rolled without tension at the tip can be more appropriately wound by the winding device 14.

The outline of the operation method of the rolling apparatus, the control device of the rolling apparatus, and the rolling equipment according to some embodiments will be described below.

(1) The method of operating the rolling mill according to at least one embodiment of the present invention is as follows.
A method of operating a rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate.
While rolling the metal plate with the pair of rolling rolls while the ejection side tension applied to the metal plate is zero, the plate end of the metal plate in the plate width direction at the position of the exit side of the pair of rolling rolls. A detection step to detect the position and
When the detection result of the metal plate width end position in the detection step deviates from the reference position to one side in the plate width direction, the outflow direction of the metal plate from the rolling roll is the transport direction of the metal plate in the rolling apparatus. The first leveling step of controlling the rolling rolls under pressure so as to follow the above.
After the first leveling step, the outflow direction of the metal plate from the rolling roll is shifted to the other side of the plate width direction with respect to the conveying direction, and then the outflow direction of the metal plate becomes the conveying direction. A second leveling step for controlling the reduction leveling of the pair of rolling rolls so as to return, and
To be equipped.

According to the method (1) above, while rolling the metal plate in a state where the tip is not tensioned, the plate end position in the plate width direction of the metal plate is detected at the position on the outlet side of the rolling roll. Based on the detected plate edge position deviating from the reference position to one side in the plate width direction, a deviation (bending of the tip of the metal plate) to one side in the plate width direction in the outflow direction of the metal plate occurred. Can be detected. When the bending of the tip of the metal plate is detected, the downflow leveling control is used to make the outflow direction of the metal plate follow the transport direction of the metal plate in the rolling apparatus, and then set the outflow direction of the metal plate to the transport direction. Since the rolling down leveling was controlled so that the outflow direction was along the transport direction after shifting to the other side in the width direction, the bending of the tip of the metal plate was corrected, and the tip edge of the metal plate was set in the axial direction of the winding device. The tip untensile rolling can be continued in a state of being close to parallel to. Therefore, according to the method (1) above, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(2) In some embodiments, in the method of (1) above,
Relative to the one side of the metal plate on the other side until the plate end position returns to the reference position in the first leveling step after the plate end position is separated from the reference position toward the one side. A stretch difference calculation step for calculating a typical first stretch difference is provided.
In the second leveling step, rolling leveling control of the pair of rolling rolls is performed so that the second elongation difference of the metal plate on one side with respect to the other side becomes equal to the first elongation difference. ..

The first elongation difference caused by the bending of the tip of the metal plate indicates the magnitude of the deviation to one side in the plate width direction in the outflow direction of the metal plate. In this regard, according to the method (2) above, the first elongation difference caused by the bending of the tip of the metal plate is calculated, and the rolling roll is made so that the above-mentioned second elongation difference becomes equal to the above-mentioned first elongation difference. Performs rolling leveling control. That is, the elongation generated on one end side of the metal plate due to the bending of the tip of the metal plate (elongation corresponding to the first elongation difference) and the same magnitude (elongation corresponding to the second elongation difference) are applied to the other end of the metal plate. Since the reduction leveling control is performed so as to be applied to the side, the bending of the tip of the metal plate can be appropriately corrected, and the tip edge of the metal plate can be brought close to parallel to the axial direction of the winding device. Therefore, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(3) In some embodiments, in the method (2) above,
In the elongation difference calculation step, the plate end position is separated from the reference position toward the one side, and the plate end position returns to the reference position in the first leveling step. The first elongation difference is calculated based on the time integration of the deviation amount of the plate edge position.

The above-mentioned first elongation difference caused by the bending of the tip of the metal plate has a correlation with the time integration of the deviation amount of the plate end position with respect to the above-mentioned reference position, and typically, the first elongation difference and the above-mentioned first elongation difference. There is a proportional relationship with the time integration of the above-mentioned deviation amount. In this regard, according to the method (3) above, the first elongation difference can be appropriately calculated based on the time integration of the deviation amount described above. Therefore, in the second leveling step, the reduction leveling control is performed so as to give the metal plate a second elongation difference equal to the first elongation difference calculated in this way, thereby appropriately correcting the tip bending of the metal plate and metal. The tip edge of the plate can be brought close to parallel to the axial direction of the take-up device. Therefore, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(4) In some embodiments, in the method (2) or (3) above,
A step of calculating the remaining time for calculating the remaining time until the tip of the metal plate reaches the winding device provided on the downstream side of the pair of rolling rolls is provided.
In the second leveling step, the reduction leveling control of the pair of rolling rolls is performed so as to give the metal plate the second elongation difference having a magnitude equal to that of the first elongation difference within the remaining time.

According to the method (4) above, after the tip of the metal plate is bent, the remaining time until the tip of the metal plate reaches the winding device is calculated, and the second elongation difference is set within the calculated remaining time. Since the metal plate is given to the plate, the bending of the tip of the metal plate can be appropriately corrected before the metal plate starts winding, and the tip edge of the metal plate can be brought close to parallel to the axial direction of the winding device. Therefore, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(5) In some embodiments, in any of the above methods (1) to (4),
Based on the first deviation angle θ1 of the metal plate to the one side with respect to the transport direction of the outflow direction at the start of the first leveling step, the transport direction of the outflow direction during execution of the second leveling step. The second deviation angle θ2 with respect to the other side is determined.

The first deviation angle θ1 toward one side with respect to the transport direction in the outflow direction of the metal plate caused by the bending of the tip of the metal plate is the same as the above-mentioned first elongation difference, that is, the one in the plate width direction in the outflow direction of the metal plate. Indicates the magnitude of the deviation to the side. In this regard, according to the method (5) above, the second deviation angle θ2 to the other side with respect to the transport direction in the outflow direction during the execution of the second leveling step is appropriately determined based on the first deviation angle θ1 described above. can do. Therefore, by performing the reduction leveling control so as to give the second deviation angle θ2 determined in this way to the metal plate, the bending of the tip of the metal plate is appropriately corrected, and the tip edge of the metal plate is wound around the winding device. It can be made parallel to the axial direction. Therefore, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(6) In some embodiments, in any of the configurations (1) to (5) above,
After the completion of the first leveling step, the second leveling step is started within a time equal to or less than the time required for the first leveling step.

According to the configuration of (6) above, after the outflow direction of the metal plate is aligned with the transport direction in the first leveling step, the second leveling step is started within the time required for the first leveling step or less. The outflow direction of the metal plate is shifted to the other side. That is, after the end of the first leveling step, the outflow direction of the metal plate is shifted to the other side without much time, so that the center position in the plate width direction at the tip bending portion of the metal plate at the end of the second leveling step. And, the amount of deviation in the plate width direction from the center position of the metal plate in the plate width direction in the rolling roll can be reduced. Therefore, the metal plate that has been rolled without tension at the tip can be wound more appropriately by the winding device.

(7) In some embodiments, in any of the methods (1) to (6) above,
Before the detection step, the plate end positions are detected at two different locations in the transport direction, and when the difference between the detection results of the plate end positions at the two locations is within the specified range, the pair A rolling start step for starting rolling of the metal plate by a rolling roll is provided.

If the tip tensionless rolling is started with the longitudinal direction of the metal plate tilted with respect to the transport direction by the rolling apparatus, the metal plate flows out based on the plate end position detected on the outlet side of the rolling roll. It may not be possible to properly detect that a deviation to one side (bending of the tip of the metal plate) has occurred in the width direction of the plate. In this regard, according to the method (7) above, the plate end positions in the plate width direction are detected at two different locations in the transport direction, and when the difference between these detection results is within the specified range, the metal plate Start non-tensile rolling at the tip of the. That is, since it was confirmed that the difference between the plate end positions detected at the two locations was small and the longitudinal direction of the metal plate was close to parallel to the transport direction, the tip tensionless rolling was started. After the start of rolling, it is properly determined that the deviation to one side (bending of the tip of the metal plate) in the plate width direction in the outflow direction of the metal plate has occurred based on the plate end position detected on the outlet side of the rolling roll. Can be detected.

(8) In some embodiments, in any of the methods (1) to (7) above,
Prior to the detection step, the plate end position of the metal plate in the plate width direction is detected at the position on the exit side of the pair of rolling rolls, and the difference between the reference position of the metal plate in the plate width direction and the plate end position. Includes a rolling start step to start rolling the metal plate with the pair of rolling rolls when is within the specified range.

According to the configuration of (8) above, the difference between the reference position and the plate end position in the plate width direction of the metal plate is set within the specified range before the start of the tip tensionless rolling, so that the metal plate is made into a plate. The tip tensionless rolling can be started after being placed at an appropriate position in the width direction. For example, tipless tension rolling can be started in a state where the center position of the rolling roll and the center position of the metal plate in the plate width direction are aligned. Therefore, according to the method (8) above, the metal plate that has been rolled without tension at the tip can be wound more appropriately by the winding device.

(9) In some embodiments, the method of any of (1) to (6) above is
Prior to the detection step, rolling of the metal plate by the pair of rolling rolls is started in a state where the output tension is zero, and at least the tip of the metal plate reaches the position on the exit side of the pair of rolling rolls. The rolling speed of the metal plate is lower than the target rolling speed in the state where the output tension is zero.

According to the method (9) above, the tip tensionless rolling is performed at a speed lower than the target speed in the tip tensionless rolling at least until the tip of the metal plate reaches the plate end detection position on the exit side of the rolling roll. Therefore, it is easy to maintain the longitudinal direction of the metal plate parallel to the transport direction. Therefore, after the tip of the metal plate reaches the plate end detection position on the exit side of the rolling roll, one side in the plate width direction in the outflow direction of the metal plate is based on the plate end position detected on the outlet side of the rolling roll. It is possible to appropriately detect that the deviation (bending of the tip of the metal plate) has occurred.

(10) In some embodiments, the method of any of (1) to (9) above is
After the start of the detection step, the step of increasing the rolling speed of the metal plate so as to approach the target rolling speed in the state where the output tension is zero is provided.

According to the configuration of (10) above, the productivity of the rolling apparatus can be improved by appropriately increasing the rolling speed during the tip tensionless rolling.

(11) The control device for the rolling mill according to at least one embodiment of the present invention is
A control device for controlling a rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate.
While rolling the metal plate with the pair of rolling rolls while the ejection side tension applied to the metal plate is zero, the plate end of the metal plate in the plate width direction at the position of the exit side of the pair of rolling rolls. A detector configured to detect the position and
When the detection result of the plate end position by the detection unit deviates from the reference position to one side in the plate width direction, the outflow direction of the metal plate from the rolling roll is along the transport direction of the metal plate in the rolling apparatus. As described above, the first leveling portion configured to control the reduction leveling of the pair of rolling rolls and
After the reduction leveling control by the first leveling unit, the outflow direction of the metal plate from the rolling roll is shifted to the other side in the plate width direction with respect to the transport direction, and then the outflow direction of the metal plate. A second leveling portion configured to control the reduction leveling of the pair of rolling rolls so as to return to the transport direction.
To be equipped.

According to the configuration of (11) above, while rolling the metal plate in a state where the tip is not tensioned, the plate end position in the plate width direction of the metal plate is detected at the position on the outlet side of the rolling roll. Based on the detected plate edge position deviating from the reference position to one side in the plate width direction, a deviation (bending of the tip of the metal plate) to one side in the plate width direction in the outflow direction of the metal plate occurred. Can be detected. When the bending of the tip of the metal plate is detected, the downflow leveling control is used to make the outflow direction of the metal plate follow the transport direction of the metal plate in the rolling apparatus, and then set the outflow direction of the metal plate to the transport direction. Since the rolling down leveling was controlled so that the outflow direction was along the transport direction after shifting to the other side in the width direction, the bending of the tip of the metal plate was corrected, and the tip edge of the metal plate was set in the axial direction of the winding device. The tip untensile rolling can be continued in a state of being close to parallel to. Therefore, according to the configuration (11) above, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

(12) The rolling equipment according to at least one embodiment of the present invention is
A rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate,
The control device according to (11) above,
To be equipped.

According to the configuration of (12) above, while rolling the metal plate in a state where the tip is not tensioned, the plate end position in the plate width direction of the metal plate is detected at the position on the outlet side of the rolling roll. Based on the detected plate edge position deviating from the reference position to one side in the plate width direction, a deviation (bending of the tip of the metal plate) to one side in the plate width direction in the outflow direction of the metal plate occurred. Can be detected. When the bending of the tip of the metal plate is detected, the downflow leveling control is used to make the outflow direction of the metal plate follow the transport direction of the metal plate in the rolling apparatus, and then set the outflow direction of the metal plate to the transport direction. Since the rolling down leveling was controlled so that the outflow direction was along the transport direction after shifting to the other side in the width direction, the bending of the tip of the metal plate was corrected, and the tip edge of the metal plate was set in the axial direction of the winding device. The tip untensile rolling can be continued in a state of being close to parallel to. Therefore, according to the configuration (12) above, the metal plate that has been rolled without tension at the tip can be appropriately wound by the winding device.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and includes a modified form of the above-described embodiments and a combination of these embodiments as appropriate.

In the present specification, expressions representing relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial". Strictly represents not only such an arrangement, but also a tolerance or a state of relative displacement at an angle or distance to the extent that the same function can be obtained.
For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the state of existence.
Further, in the present specification, the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also within a range in which the same effect can be obtained. , The shape including the uneven portion, the chamfered portion, etc. shall also be represented.
Further, in the present specification, the expression "comprising", "including", or "having" one component is not an exclusive expression excluding the existence of another component.

1 Rolling equipment 2 Rolling equipment 4 Unwinding equipment 5 Rolling roll 6 Enter side pinch roll 8 Side guide 10 Roller 10A 1st rolling machine 10B 2nd rolling machine 12 Outer side pinch roll 14 Winding equipment 15 Rolling roll 15A 1st rolling Roll 15B 2nd rolling roll 16 Rolling roll 16A 1st rolling roll 16B 2nd rolling roll 17 Intermediate roll 18 Intermediate roll 19 Backup roll 20 Backup roll 22 Rolling device 30 Metal plate 32 1st plate edge detection unit 32A 1st plate edge detection Part 32B 1st plate edge detection unit 34 2nd plate edge detection unit 34A 2nd plate end detection unit 34B 2nd plate end detection unit 36 Plate thickness total 38 Plate thickness total 40 Controller 42 Judgment unit 44 Rolling control unit 46 1st leveling Part 48 Second leveling part 50 Difference calculation part 52 Deviation angle calculation part 54 Time calculation part 90 Metal plate

90a Tip part

90b Transition part 90c Subsequent part 91 Tip 92 First end edge 93 Second end edge 94 First surface 95 Second Surface 100 Control device A1 Rectangular part Lc Center line O Center axis S2A'Area S2B' Area Y1 First position Y2 Second position m Distance x1 First plate end position x2 Second plate end position x _B Plate end position x _ref Reference position Δe deviation amount θ1 first deviation angle θ2 second deviation angle

Claims

A method of operating a rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate.
While rolling the metal plate with the pair of rolling rolls while the ejection side tension applied to the metal plate is zero, the plate end of the metal plate in the plate width direction at the position of the exit side of the pair of rolling rolls. A detection step to detect the position and
When the detection result of the plate end position in the detection step deviates from the reference position to one side in the plate width direction, the outflow direction of the metal plate from the rolling roll is along the transport direction of the metal plate in the rolling apparatus. As described above, the first leveling step for controlling the reduction leveling of the pair of rolling rolls and
After the first leveling step, the outflow direction of the metal plate from the rolling roll is shifted to the other side of the plate width direction with respect to the conveying direction, and then the outflow direction of the metal plate becomes the conveying direction. A second leveling step for controlling the reduction leveling of the pair of rolling rolls so as to return, and
How to operate a rolling mill equipped with.
Relative to the one side of the metal plate on the other side until the plate end position returns to the reference position in the first leveling step after the plate end position is separated from the reference position toward the one side. A stretch difference calculation step for calculating a typical first stretch difference is provided.
In the second leveling step, the reduction leveling control of the pair of rolling rolls is performed so that the second elongation difference of the metal plate on one side with respect to the other side becomes equal to the first elongation difference. The method of operating the rolling apparatus according to claim 1.
In the elongation difference calculation step, the plate end position is separated from the reference position toward the one side, and the plate end position returns to the reference position in the first leveling step. The method for operating a rolling apparatus according to claim 2, wherein the first elongation difference is calculated based on the time integration of the deviation amount of the plate end position.
A step of calculating the remaining time for calculating the remaining time until the tip of the metal plate reaches the winding device provided on the downstream side of the pair of rolling rolls is provided.
2. Claim 2 in which in the second leveling step, reduction leveling control of the pair of rolling rolls is performed so as to give the metal plate the second elongation difference having a magnitude equal to that of the first elongation difference within the remaining time. Or the operation method of the rolling apparatus according to 3.
The transport direction in the outflow direction during the execution of the second leveling step based on the first deviation angle θ1 of the metal plate to the one side with respect to the transport direction in the outflow direction at the start of the first leveling step. The method for operating a rolling apparatus according to any one of claims 1 to 4, wherein the second deviation angle θ2 with respect to the other side is determined.
The method for operating a rolling apparatus according to any one of claims 1 to 5, wherein the second leveling step is started within a time equal to or less than the time required for the first leveling step after the completion of the first leveling step.
Prior to the detection step, the plate end positions are detected at two different locations in the transport direction, and when the difference between the detection results of the plate end positions at the two locations is within the specified range, the pair The method for operating a rolling apparatus according to any one of claims 1 to 6, further comprising a rolling start step for starting rolling of the metal plate by a rolling roll.
Prior to the detection step, the plate end position of the metal plate in the plate width direction is detected at the position on the exit side of the pair of rolling rolls, and the difference between the reference position of the metal plate in the plate width direction and the plate end position. The method of operating a rolling apparatus according to any one of claims 1 to 7, further comprising a rolling start step of starting rolling of the metal plate by the pair of rolling rolls when is within the specified range.
Prior to the detection step, rolling of the metal plate by the pair of rolling rolls is started in a state where the output tension is zero, and at least the tip of the metal plate reaches the position on the exit side of the pair of rolling rolls. The method of operating a rolling apparatus according to any one of claims 1 to 6, further comprising a step of performing the rolling at a rolling speed lower than the target rolling speed in a state where the output tension is zero.
The invention according to any one of claims 1 to 9, further comprising a step of increasing the rolling speed of the metal plate so as to approach the target rolling speed in a state where the output tension is zero after the start of the detection step. How to operate the rolling mill.
A control device for controlling a rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate.
While rolling the metal plate with the pair of rolling rolls while the ejection side tension applied to the metal plate is zero, the plate end of the metal plate in the plate width direction at the position of the exit side of the pair of rolling rolls. A detector configured to detect the position and
When the detection result of the plate end position by the detection unit deviates from the reference position to one side in the plate width direction, the outflow direction of the metal plate from the rolling roll is along the transport direction of the metal plate in the rolling apparatus. As described above, the first leveling portion configured to control the reduction leveling of the pair of rolling rolls and
After the reduction leveling control by the first leveling unit, the outflow direction of the metal plate from the rolling roll is shifted to the other side in the plate width direction with respect to the transport direction, and then the outflow direction of the metal plate. A second leveling portion configured to control the reduction leveling of the pair of rolling rolls so as to return to the transport direction.
A control device for a rolling mill.
A rolling apparatus including a pair of rolling rolls provided so as to sandwich a metal plate,
The control device according to claim 11 and
Rolling equipment equipped with.