JP2012245521A - Roller leveler, and treatment equipment and treatment method of metal plate using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller leveler that hardly generates flaws on a leveling roller when conveying a metal plate.SOLUTION: The roller leveler 100 includes: a plurality of leveling rollers 6, 8 arranged in zigzag above and beneath a passing line of the metal plate to be corrected, which rotate so as to pass the metal plate through while sandwiching and correcting the metal plate; a plurality of backup rollers 7, 9 for backing up the leveling rollers 6, 8; a reduction cylinder 4 for reducing the metal plate P through the leveling rollers 6, 8; and contact/separation mechanisms (cylinders) 15, 16 for making contact or separating the leveling roller 6 (8) and the backup roller 7 (9).

Description

  The present invention relates to a roller leveler that corrects a metal plate such as a steel plate, and a metal plate processing facility and method using the roller leveler.

  In the process of manufacturing a metal plate such as a steel plate, rolling or cooling is performed. In these steps, the metal plate is warped or deformed in a wave shape. For this reason, a roller leveler in which a plurality of leveling rolls are arranged in a staggered manner in the vertical direction is used for the purpose of correcting such warpage and wave shape deformation to flatten the metal plate.

  The roller leveler is a state in which the metal plate to be corrected is in a state in which the upper roll is pushed into the lower roll, or in a state in which the lower roll is pushed into the upper roll, or a gap between the upper roll and the lower roll is determined as the thickness of the metal plate. The plate is passed in a state where pressure is applied at the same level, and the metal plate is repeatedly bent, thereby flattening the warp and wave shape of the metal plate. The leveling roll is backed up by the backup roll.

  For example, such a roller leveler is used as a pre-hot leveler to accelerate the cooling mill when it is necessary to transport the steel plate from the rolling mill to the accelerated cooling device and accelerate cooling. It may be arranged between cooling devices (for example, patent documents 1). Moreover, since the shape of a steel plate deteriorates by accelerated cooling, the steel plate after leaving an accelerated cooling device is finally corrected by a hot leveler.

JP 54-124864 A

  However, in such facilities, depending on the material of the steel plate, accelerated cooling may not be performed. In that case, the steel plate is transported at high speed to the final hot leveler without using the pre-hot leveler. Thus, the steel plate is passed through the pre-hot leveler at a high speed. Further, during rolling of a steel sheet by a rolling mill, the steel sheet may be passed through a pre-hot leveler that is not performing a straightening operation. Moreover, when passing through in this way, the steel sheet may be accelerated or decelerated abruptly. In this way, when the steel sheet is passed at a high speed or accelerated / decelerated rapidly, the leveling roll and the backup roll of the pre-hot leveler may slip and roll wrinkles may occur in the leveling roll.

This invention is made | formed in view of such a condition, and makes it a subject to provide the roller leveler which a wrinkle does not generate | occur | produce easily on a leveling roll at the time of conveyance of a metal plate.
It is another object of the present invention to provide a metal plate processing facility and a processing method using such a roller leveler.

  In order to solve the above-mentioned problems, the present invention is arranged in a zigzag pattern above and below a plate passing line of a metal plate to be corrected, and rotates a plurality of leveling plates so as to pass the metal plate while correcting the metal plate. A roll, a plurality of backup rolls for backing up the leveling roll, a reduction cylinder for reducing the metal plate via the leveling roll, and a contact / separation mechanism for contacting and separating the leveling roll and the backup roll. Providing a featured roller leveler.

  In the roller leveler, when the metal plate is straightened, the leveling roll and the backup roll are brought into contact with each other, and when the metal plate is passed through without being straightened, the leveling roll and the backup roll are separated from each other. You may further comprise the control apparatus which controls an approach / separation mechanism.

  The contact / separation mechanism may include a lift cylinder that lifts and lowers the leveling roll. The leveling roll has a plurality of upper leveling rolls arranged above the sheet plate line of the metal plate and a plurality of lower leveling rolls arranged below the sheet plate line, and the backup roll includes the upper part The upper leveling roll ascending / descending mechanism has a plurality of upper backup rolls for backing up the leveling rolls and a plurality of lower backup rolls for backing up the lower leveling rolls. It can be set as the structure which has a cylinder and the lower leveling roll raising / lowering cylinder which raises / lowers the said lower leveling roll.

  The present invention also provides a rolling device for rolling a metal plate, a first roller leveler provided on the downstream side of the rolling device, an acceleration cooling device provided on the downstream side of the first roller leveler, and the accelerated cooling. A second roller leveler provided on the downstream side of the apparatus, and the first roller leveler is arranged in a zigzag pattern above and below the sheet plate line of the metal plate to be corrected, while correcting the metal plate between A plurality of leveling rolls that rotate so as to pass a metal plate, a plurality of backup rolls that back up the leveling roll, a reduction cylinder that compresses the metal plate via the leveling roll, the leveling roll, and the backup roll A contact / separation mechanism that contacts and separates the first roller leveler when the metal plate requires accelerated cooling. In a state where the leveling roll and the backup roll are in contact with each other, the metal plate after being rolled by the rolling device is corrected by the first roller leveler, and thereafter accelerated cooling is performed by the accelerated cooling device, and after accelerated cooling When the metal plate is corrected by the second roller leveler and the metal plate does not require accelerated cooling, the leveling roll and the backup roll are separated by the contact / separation mechanism of the first roller leveler. In this state, the metal plate after being rolled by the rolling device is passed through without being corrected by the first roller leveler, and is corrected by the second roller leveler without performing accelerated cooling. Provide facilities.

  Furthermore, the present invention provides a rolling device for rolling a metal plate, a first roller leveler provided on the downstream side of the rolling device, an acceleration cooling device provided on the downstream side of the first roller leveler, and the accelerated cooling. In a processing apparatus comprising a second roller leveler provided on the downstream side of the apparatus, a processing method for processing a metal plate, wherein the metal plate requires accelerated cooling, the first In a state where the leveling roll and the backup roll are in contact with each other by one roller leveler, the metal plate after being rolled by the rolling device is corrected by the first roller leveler, and then accelerated cooling is performed by the accelerated cooling device, When the metal plate after accelerated cooling is corrected by the second roller leveler and the metal plate does not require accelerated cooling, the level of the first roller leveler is increased. In a state where the ring roll and the backup roll are separated from each other, the metal plate after being rolled by the rolling device is passed through without being corrected by the first roller leveler, and by the second roller leveler without performing accelerated cooling. Provided is a processing method characterized by correcting.

  According to the present invention, since the contact / separation mechanism for contacting and separating the leveling roll and the backup roll is provided, when the metal plate is corrected, the leveling roll and the backup roll are brought into contact with each other and the metal plate is passed through without correcting. In this case, the leveling roll and the backup roll can be separated from each other, and it is possible to prevent the leveling roll and the backup roll from slipping and generating wrinkles in the leveling roll during high-speed threading.

It is a side view which shows the roller leveler which concerns on one Embodiment of this invention. It is a top view which shows the roller leveler which concerns on one Embodiment of this invention. It is a schematic diagram which shows the state which the leveling roll and the backup roll contacted in the roller leveler which concerns on one Embodiment of this invention. It is a schematic diagram which shows the state which the leveling roll and the backup roll separated in the roller leveler which concerns on one Embodiment of this invention. It is a block diagram which shows the processing equipment which applied the roller leveler which concerns on this embodiment as a pre-hot leveler. FIG. 6 is a schematic diagram illustrating a state in which the metal plate is corrected in the pre-hot leveler and a case where the metal plate is passed through the pre-hot leveler in the processing facility of FIG. 5.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a side view showing a roller leveler according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The roller leveler 100 according to the present embodiment corrects the shape of the metal plate P such as a steel plate while it is being conveyed, and supports the housing 1, the upper frame 2 provided inside the housing 1, and the housing 1. And a lower frame 3 provided in the frame.

  Between the upper frame 2 and the lower frame 3, a plurality of upper leveling rolls 6 for correcting the metal plate P and a plurality of upper leveling rolls 6 facing the lower side of the upper leveling roll 6 across the pass line of the metal plate P The lower leveling rolls 8 of the books are arranged in a staggered manner. In the figure, there are four upper leveling rolls 6 and three lower leveling rolls 8, but the present invention is not limited to this.

  On the upper leveling roll 6, a plurality of short upper backup rolls 7 that back up the upper leveling roll 6 are arranged along the axial direction of the upper leveling roll 6. A plurality of short lower backup rolls 9 for backing up the lower leveling roll 8 are arranged below the lower leveling roll 8 along the axial direction of the lower leveling roll 8.

  The upper backup roll 7 is supported by the upper backup roll frame 11, the upper leveling roll 6 is supported by the upper leveling roll frame 10, the lower leveling roll 8 is supported by the lower leveling roll frame 12, and the lower backup roll 9 is supported by the lower backup roll 9. It is supported by the frame 13.

  The housing 1 is provided with a reduction cylinder 4 that applies a reduction force for correction to the metal plate P on the front surface and the rear surface. The reduction cylinder 4 reduces the metal plate P via the upper frame 2, the upper backup roll 7, and the upper leveling roll 6. A balance cylinder 5 is provided between the front side and rear side reduction cylinders 4. Instead of the reduction cylinder 4 that reduces the metal plate P via the upper leveling roll 6, a reduction cylinder that reduces the metal plate P via the lower leveling roll 8 may be provided.

  Between the upper frame 2 and the upper leveling roll frame 10, upper leveling roll lifting cylinders 15 that lift and lower the upper leveling roll 6 via the upper leveling roll frame 10 are provided on the front side and the rear side. On the other hand, between the lower frame 3 and the lower leveling roll frame 12, lower leveling roll lifting cylinders 16 that lift and lower the lower leveling roll 8 through the lower leveling roll frame 12 are provided on the front side and the rear side. Then, the upper leveling roll 6 is moved up and down by the upper leveling roll lifting cylinder 15 so that the upper leveling roll 6 and the upper backup roll 7 can be brought into contact with and separated from each other, and the lower leveling roll lifting cylinder 16 lifts and lowers the lower leveling roll 8. By doing so, the lower leveling roll 8 and the lower backup roll 9 can be contacted and separated.

  A transport roll 18 for transporting the metal plate P is provided on the upstream side and the downstream side in the transport direction of the metal plate P in the region where the upper and lower leveling rolls 6 and 8 are disposed. In addition, on the upstream side of the region where the upper and lower leveling rolls 6 and 8 are arranged, a knock-down roll 20 for pressing the warp of the leading end of the metal plate P being conveyed at a position close to the housing 1. Is provided.

  As shown in FIG. 2, the shafts of the upper leveling roll 6 and the lower leveling roll 8 reach the drive unit 22, and the upper leveling roll 6 and the lower leveling roll 8 are forward and reverse by a main drive motor 23 connected to the drive unit 22. It can be rotated.

  Further, the roller leveler 100 of the present embodiment includes each component, for example, a reduction cylinder 4, a balance cylinder 5, an upper leveling roll lifting cylinder 15, a lower leveling roll lifting cylinder 16, a knock down roll 20, a drive unit 22, and a main drive motor 23. Etc. are controlled by the control device 25.

  Next, the operation | movement at the time of correcting the metal plate P with the roller leveler 100 comprised in this way is demonstrated. The following operations are performed based on commands from the control device 25.

  First, when the metal plate P is corrected by the roller leveler 100, as shown in FIG. 3, the piston 15a of the upper leveling roll elevating cylinder 15 and the piston 16a of the lower leveling roll elevating cylinder 16 are used as reference positions, and the upper leveling roll 6 and the upper backup roll 7 are in contact with each other, and the lower leveling roll 8 and the lower backup roll 9 are in contact with each other (grip state).

  In this state, the metal plate P conveyed from the upstream side to the arrangement area of the upper and lower leveling rolls 6 and 8 by the conveying roll 18 is inserted between the upper leveling roll 6 and the lower leveling roll 8. At this time, the tip of the metal plate P is pressed and corrected with the knock-down roll 20 as necessary.

  The metal plate P inserted into the arrangement region of the upper and lower leveling rolls 6 and 8 is sandwiched between the upper leveling roll 6 and the lower leveling roll 8 by the reduction force of the reduction cylinder 4 and is reduced. The upper leveling roll 6 and the lower leveling roll 8 are rotated by the driving unit 22 to pass the metal plate P between them. Thereby, the metal plate P is corrected and flattened.

  On the other hand, there is a case where the metal plate P is not corrected by the roller leveler 100 and the metal plate P is passed at high speed. In such a case, conventionally, the plate must be passed as it is. . Further, when the metal plate P is passed at a high speed, the metal plate P may be rapidly accelerated or decelerated. In this way, when the metal plate P is passed at a high speed or is accelerated / decelerated rapidly in the same state as when the roller leveler 100 is straightened, the upper leveling roll 6, the upper backup roll 7, the lower leveling roll 8 and the lower level Since the backup roll 9 is in contact, slip may occur between them, and wrinkles may occur in the upper leveling roll 6 and the lower leveling roll 8.

  For this reason, in this embodiment, when letting the metal plate P pass through without being corrected, as shown in FIG. 4, the piston 15a of the upper leveling roll lifting cylinder 15 and the piston 16a of the lower leveling roll lifting cylinder 16 are provided. The upper leveling roll 6 and the upper backup roll 7 and the lower leveling roll 8 and the lower backup roll 9 are separated from each other by moving from the reference position (release state). Then, the metal plate P is passed through in a state where the reduction by the reduction cylinder 4 is not performed.

  As a result, when the metal plate P is passed through without being corrected, the upper leveling roll 6, the upper backup roll 7, and the lower leveling roll 8 can be used even when the passing plate is high speed or sudden acceleration / deceleration occurs. No slip is generated between the upper and lower backup rolls 9, and wrinkles are prevented from occurring in the upper leveling roll 6 and the lower leveling roll 8.

Next, application examples of such a roller leveler 100 will be described.
Here, about the example which uses the roller leveler 100 of the said embodiment as a pre-hot leveler in the processing equipment which can be accelerated and cooled after it corrects with a pre-hot leveler after rolling the metal plate P, and is corrected with a hot leveler after that. explain.

  FIG. 5 is a block diagram showing such a processing facility. The processing facility 200 includes, from the upstream side, a rolling device 300, the roller leveler 100 arranged as a pre-hot leveler, an acceleration cooling device 400, and a hot leveler 500 that performs final correction.

  When the metal plate P is a steel plate (accelerated coolant) that requires accelerated cooling, the accelerated coolant needs to be corrected after rolling for the purpose of reducing cooling unevenness in the accelerated cooling device 400. A pre-hot leveler 100 is disposed on the downstream side of 300. Then, as shown in FIG. 6A, the rolled accelerated coolant is corrected by the pre-hot leveler 100 and then conveyed to the accelerated cooling device 400. At this time, the pre-hot leveler 100 is in a grip state in which the upper leveling roll 6 and the upper backup roll 7 are in contact with each other, and the lower leveling roll 8 and the lower backup roll 9 are in contact with each other. At this time, the rolling mill of the rolling apparatus 300 is in an open state.

  On the other hand, when a steel plate other than the accelerated coolant is processed as the metal plate P in such equipment, it is corrected by the hot leveler 500 after rolling without performing correction by the pre-hot leveler 100 and accelerated cooling by the accelerated cooling device 400. The In such a case, the metal plate P is not corrected by the pre-hot leveler 100, but is simply passed through. Therefore, as shown in FIG. 6B, the pre-hot leveler 100 includes the upper leveling roll 6 and the upper backup roller. The roll 7 is separated, and the lower leveling roll 8 and the lower backup roll 9 are separated. Even if the metal plate P is an accelerated coolant, when the metal plate P is rolled, the pre-hot leveler 100 does not perform correction processing, but the metal plate P is passed through the pre-hot leveler 100. There is a case. Also in this case, the release state shown in FIG. This prevents slippage between the upper leveling roll 6 and the upper backup roll 7, and the lower leveling roll 8 and the lower backup roll 9, thereby causing wrinkles in the upper leveling roll 6 and the lower leveling roll 8.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, the case where the upper leveling roll is squeezed by the reduction cylinder to correct the shape of the metal plate has been described. However, the lower leveling roll is squeezed by the reduction cylinder to correct the shape of the metal plate. Also good. Moreover, although the example which applied the roller leveler of this invention to the pre-hot leveler was shown in the said embodiment, not only this but a normal hot leveler and a cold leveler may be sufficient. Furthermore, in the said embodiment, although the cylinder mechanism was used for contact / separation of a leveling roll and a backup roll, you may use other mechanisms, such as a ball screw mechanism.

DESCRIPTION OF SYMBOLS 1; Housing 2; Upper frame 3; Lower frame 4; Rolling cylinder 5; Balance cylinder 6; Upper leveling roll 7; Upper backup roll 8; Lower leveling roll 9; Lower backup roll 10; Upper leveling roll frame 11; Frame 12; Lower leveling roll frame 13; Lower backup roll frame 15; Upper leveling roll lifting cylinder 16; Lower leveling roll lifting cylinder 22; Drive unit 23; Main drive motor 25; Control unit 100; Roller leveler (pre-hot leveler)
200; Processing equipment 300; Rolling device 400; Accelerated cooling device 500; Hot leveler P; Metal plate (material to be corrected)

Claims (6)

A plurality of leveling rolls that are arranged in a zigzag pattern above and below the plate passing line of the metal plate to be corrected, and rotate so as to pass the metal plate while correcting the metal plate in between,
A plurality of backup rolls for backing up the leveling roll;
A reduction cylinder for reducing the metal plate via the leveling roll;
A roller leveler comprising a contact / separation mechanism for contacting and separating the leveling roll and the backup roll.   When the metal plate is straightened, the leveling roll and the backup roll are brought into contact with each other, and when the metal plate is passed through without being straightened, the contact / separation mechanism is arranged to separate the leveling roll from the backup roll. The roller leveler according to claim 1, further comprising a control device for controlling.   The roller leveler according to claim 1, wherein the contact / separation mechanism includes an elevating cylinder that elevates and lowers the leveling roll.   The leveling roll has a plurality of upper leveling rolls arranged above the sheet plate line of the metal plate and a plurality of lower leveling rolls arranged below the sheet plate line, and the backup roll includes the upper part The upper leveling roll ascending / descending mechanism has a plurality of upper backup rolls for backing up the leveling rolls and a plurality of lower backup rolls for backing up the lower leveling rolls. The roller leveler according to claim 3, further comprising a cylinder and a lower leveling roll elevating cylinder for elevating and lowering the lower leveling roll. A rolling device for rolling a metal plate, a first roller leveler provided on the downstream side of the rolling device, an acceleration cooling device provided on the downstream side of the first roller leveler, and a downstream side of the acceleration cooling device A second roller leveler,
The first roller leveler is:
A plurality of leveling rolls that are arranged in a zigzag pattern above and below the plate passing line of the metal plate to be corrected, and rotate so as to pass the metal plate while correcting the metal plate in between,
A plurality of backup rolls for backing up the leveling roll;
A reduction cylinder for reducing the metal plate via the leveling roll;
A contact and separation mechanism for contacting and separating the leveling roll and the backup roll;
When the metal plate is one that requires accelerated cooling, after the leveling roll and the backup roll are in contact with each other by the contact / separation mechanism of the first roller leveler, A metal plate is corrected by the first roller leveler, and then accelerated cooling is performed by the accelerated cooling device, and the metal plate after accelerated cooling is corrected by the second roller leveler,
When the metal plate does not require accelerated cooling, the leveling roll and the backup roll are separated from each other by the contact / separation mechanism of the first roller leveler, and then rolled by the rolling device. A processing facility characterized in that a metal plate is passed through without being corrected by the first roller leveler and is corrected by the second roller leveler without performing accelerated cooling. A rolling device for rolling a metal plate, a first roller leveler provided on the downstream side of the rolling device, an acceleration cooling device provided on the downstream side of the first roller leveler, and a downstream side of the acceleration cooling device In the processing apparatus comprising the second roller leveler, a processing method for processing a metal plate,
When the metal plate requires accelerated cooling, the metal plate after being rolled by the rolling device in a state where the leveling roll and the backup roll are in contact with each other by the first roller leveler. 1 is corrected by the roller leveler, and then accelerated cooling is performed by the accelerated cooling device, and the metal plate after accelerated cooling is corrected by the second roller leveler,
When the metal plate does not require accelerated cooling, the leveling roll of the first roller leveler and the backup roll are separated, and the metal plate after being rolled by the rolling device is A processing method comprising: passing through a plate without correcting with one roller leveler; and correcting with the second roller leveler without performing accelerated cooling.

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