JPH0724852B2 - Rolled material warpage control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a warp control device for a rolled material that suppresses the warpage of the rolled material that occurs at the exit of the rolling stand in a hot strip mill or the like.

[Prior Art and its Problems] In the hot rolling process, a rolling material having a thickness of 200 to 300 mm is usually fed from a heating furnace or a continuous casting line to a hot strip mill. In the hot strip mill, the material to be rolled is rolled to a thickness of 20 to 60 mm and fed to a finish rolling mill while passing through 3 to 5 rough rolling stands. In this case, the rolled material is largely warped upward at the exit of the rolling stand, and when the warp exceeds 300 mm, it may be impossible to bite the rolled material into the next rolling stand. In particular, in the case of direct rolling (HDR) in which a slab manufactured by a continuous casting machine is directly fed to a hot rolling mill without passing through a heating furnace, this warpage is remarkable. In HDR, it is necessary to attach a heat insulating cover to the rolled material to prevent the temperature of the rolled material from decreasing. In order to increase the heat insulating effect of the rolled material, it is necessary to bring the heat insulating cover as close as possible to the rolled material. However, if the heat insulating cover is brought close to the rolled material, the heat insulating cover may be damaged due to the warp of the slab. Normally, this heat insulating cover is installed within 200 mm from the rolled material in order to obtain the required heat insulating effect. Therefore, it is necessary to make the warpage of this rolled material smaller than 200 mm. This warp has a certain tendency depending on the material temperature and the material. However, it is difficult to stably control the warpage of the rolled material to less than 200 mm only by selecting the rolling conditions. Therefore, conventionally, the warp of the rolled material generated at the exit of the rolling mill is mechanically corrected or regulated by various means.

As the simplest correction means, there is a technique for correcting the warp of the rolled material by dropping a weight of about 10 to 20 tons suspended by a crane onto the rolled material at the portion where the warp of the rolled material occurs. However, in order to reduce the warp to less than 200 mm, this weight must be held on the rolled material for 1 to 2 minutes, during which the slab temperature drops by about 50 ° C. Has the problem that it cannot be rolled.

Further, a technique for preventing the warpage of the rolled material by the regulation guide has been proposed.

FIG. 3 is a schematic diagram showing a technique of regulating the warp of the rolled material 2 by the warped material warpage regulation guide 3 which is located above the rolled material 2 and is attached to the housing 4 of the rolling mill.
This technique attempts to control the warpage of the rolled material 2 by hitting the warped rolled material 2 against the lower surface of the warpage regulation guide 3. However, in this technique, in the housing 4 of the rolling mill, a rolling roll cooling header for blowing cooling water to the rolling roll 1 and a movable part such as a wiper for preventing the cooling water from splashing on the rolled material 2 are provided. Since it is located, the mounting position of the warp regulation guide is restricted, and it is difficult to install it near the rolling roll 1. For this reason, the rolled material 2 may advance between the rolling roll 1 and the warpage regulation guide 3, and it may be impossible to regulate the warpage. Also, as shown in FIG.
In addition to the warpage regulation guide shown in FIG. 3, an auxiliary member 5 is installed near the roll within a range that does not hinder the movement of the rolling roll cooling header and the wiper, and a warpage regulation guide is additionally attached thereto. However, there is still a risk that the slab will run off the warpage regulation guide.

Further, a technique for correcting the warp of the rolled material by a correction guide has been proposed.

FIG. 5 is a schematic diagram showing a technique for correcting the warp of the rolled material by the warp correction guide 6 fixed on the table 7 for feeding the rolled material. Warp correction guide 6 and roll table 8
The gap between the rolled material 2 is wide on the side where the rolled material is inserted and gradually narrows in the feeding direction of the rolled material. This is a technique to be corrected. In this case, the warped rolled material 2 presses the warp correction guide 6, and the reaction force is applied to the rolled material 2. The pushing force for correcting the warp is represented by the product of the force applied to the rolled material 2 from the warp correction guide 6 and its friction coefficient. Normally, in the warp correction, the force applied from the guide 6 to the rolled material is about 20 tons, and the coefficient of friction between the rolling agent and the correction guide is about 0.1, so the pushing force to the rolled material 2 is about 2 tons. However, this value corresponds to the pushing force that corrects the warp of 500 mm to 400 mm, which is extremely lower than the pushing force of 10 to 50 tons required to make the warp of 500 mm to 200 mm, so the warp is 200 mm or less. Can not be fixed.

FIG. 6 is a schematic diagram showing a technique for correcting the warp of the rolled material 2 by pressing the warp correction guide 6 with a hydraulic cylinder 9 or the like. In this technique, a large pushing force can be obtained with respect to the rolled material having warpage, and the ability to correct the warpage of the rolled material 2 is significantly increased. However, in this case, the rolled material 2 is temporarily stopped and then the rolled material 2 is
Since it is necessary to apply a pushing force to the sheet, there is a problem that the production efficiency is lowered and the temperature of the rolled material 2 is lowered, so that the rolling becomes difficult.

The present invention has been made in view of such circumstances,
It is an object of the present invention to provide a warpage control device for a rolled material that does not reduce the production efficiency and that keeps the temperature of the rolled material within a predetermined range to reduce the warp of the slab at the exit of the rolling stand. To do.

[Means for Solving Problems] A warpage control device for a rolled material according to the present invention is a warpage control device for a rolled material which is installed in the vicinity of an exit of a rolling roll in a rolling mill and which controls the warpage of the rolled material, A regulating member arranged above the passage area of the rolled material so as to regulate the upward movement of the rolled material, between the regulating position near the outlet of the rolling roll and the retracted position separated from the rolling roll. And a moving means for moving the moving member, and the regulating member has a stopper that comes into contact with the housing of the rolling mill to position the regulating position, and the stopper is replaceable provided on the abutting surface. It is characterized in that the height of the regulation member at the regulation position is adjusted by adjusting the thickness of the lining member.

Embodiments Embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

FIG. 1 is a side view showing a warpage control device for rolled material according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. Rolling roll
The 12 are vertically opposed to each other, and bite and roll the rolling material.
The rolled material 13 emitted from the rolling roll 12 is fed on the roller table 26 in the direction of arrow 36. In the vicinity of the exit of the rolling roll 12, above the passage area of the rolled material 13, a warpage control device for rolled material according to the embodiment of the present invention is installed.

The connecting member 16 is installed above the passage area of the rolled material with the longitudinal direction thereof horizontal. As shown in FIG. 2, the connecting member 16 is attached to an attaching member 34 fixed to a housing 31 that accommodates a rolling stand. Support arm 14 and
15 have the same length, the upper end of which is a connecting pin
It is rotatably connected to the connecting member 16 by 19. The warp control plate 11 is connected to the support arm 14 and
It is rotatably supported by 15. With the support arms 14 and 15, the warp regulation plate 11 is maintained in a horizontal state,
It can be slightly swung about the connecting member 16.

The cylinder 17 is located above the connecting member 16 and is fixed to the housing 34 with its piston portion facing downward. The tip of the piston of the cylinder 17 is a connecting pin.
It is connected to the support arm 14 by 20. Its connecting pin 20
Is located on the side of the connecting pin 19, and the support arm 14 can rotate about the connecting pin 19 by retracting and advancing the piston of the cylinder 17. In this case, the insertion hole for the coupling pin formed in the support arm 14 is formed wider than the coupling pin 20 in the direction of the arrow 36, and as the piston of the cylinder 17 moves up and down,
The connecting pin 20 moves in the hole so that the support arm 14 can smoothly rotate. Since the distances between the coupling pins 18 and 19 in the support arms 14 and 15 are the same, by retracting the piston of the cylinder 17 and rotating the support arm 14 in the direction of the arrow 29, the warp control plate 11 is horizontally moved. While moving in the direction of arrow 27 while maintaining the posture of No. 3, the robot is retracted to the retracted position shown by the alternate long and short dash line. On the other hand, from this state
By advancing the 17 piston, the warp control plate 11 moves in the obliquely downward direction 28 to the control position shown by the solid line.

The stoppers 32 are provided on both sides of the warp regulation plate 11, as shown in FIG. A replaceable lining 33 is attached to the stopper 32 so as to face the housing 31. Then, the lining 33 moves toward the housing 31 and comes into contact with the housing 31, whereby the warp regulating plate 11
The positional relationship between the roll and the rolling roll 12 is determined. In this case, the position of the warp regulation plate 11 can be arbitrarily set by replacing the lining 33 with a different thickness. That is, the height of the regulation plate 11 in the regulation position can be set to a desired position.

The stripper guide 23 is disposed between the rolling roll 12 and the support arm 14, and is rotatably attached to the housing 31 by a connecting pin 24. This stripper guide 23
Since the fulcrum (coupling pin 24) is eccentric, it is urged to rotate in the direction of arrow 37 by its gravity. The stripper guide 23 also includes a roll cooling header 21.
And a wiper 22 are attached. Roll cooling header 21
Is installed in a portion of the stripper guide 23 that faces the rolling roll 12, and cooling water is jetted toward the rolling roll 12 to cool the rolling roll 12.
The wiper 22 is installed below the roll cooling header 21, the tip of the wiper 22 contacts the rolling roll 12 by the urging force acting on the stripper guide 23, and the cooling water from the roll cooling header 21 is applied to the rolling material 13. To prevent that. A hydraulic cylinder 25 is installed above the stripper guide 23 with its piston facing downward. The key 35 connected to the tip of the piston of the cylinder 25 is connected to the upper end of the stripper guide 23. When replacing the rolling roll, the piston of the cylinder 25 is moved back and forth so that the stripper guide 23 moves around the connecting pin 24 in the direction of the arrow.
The roller cooling header 21 and the wiper 22 are retracted by rotating in 30 directions. Further, in this case, since the warp regulating plate 11 is retracted in the direction 27 as described above, the warp regulating plate 11 and the support arm 14 and the like do not interfere with the exchange of the rolling rolls.

Next, the operation of the apparatus thus configured will be described. First, move the piston of cylinder 25 forward
22 and the roll cooling header 21 are installed at predetermined positions. Next, a lining 33 having an appropriate thickness is fitted into the stopper 32 so that the gap between the end of the warp control plate 11 and the rolling roll 12 has a predetermined length. Then, the piston of the cylinder 17 is advanced to move the warp regulation plate 11 until the lining 33 comes into contact with the housing 31. After the warpage regulating plate 11 is installed at a predetermined position, the rolling roll 12 is rotationally driven, the rolling material is supplied to the rolling roll 12, and rolling is started. The rolled material 13 coming out of the rolling roll 12 is fed in the direction of arrow 36, and at the exit of the rolling roll 12, the rolled material 13 is pressed against the warpage regulating plate 11 so that the warpage of the rolled material 13 is regulated.

Next, in the next rolling step, when changing the rolling roll 12 to one having a different diameter, the piston of the cylinder 17 is retracted, and the support arm 14 is rotated in the direction of arrow 29 to bend the warp control plate. Retract 11 in the direction of arrow 27. Then, by retracting the piston of the cylinder 25, the stripper guide 23 is rotated to retract the wiper 22 and the roll cooling head 21 in the direction of arrow 30. Then, after the completion of the work of exchanging the rolling rolls, the wiper 22 and the roll cooling header 21 are advanced as described above, the warp regulation plate 11 is moved to the regulation position, and the rolling is restarted.

As described above, since the warp regulation plate 11 has the retractable structure, there is no fear that the warp regulation plate 11 hinders the roll exchange, and during the rolling, the warp regulation plate 11 can be installed in the vicinity of the rolling roll 12. It will be possible. Therefore, the warp control plate
A large pushing force acts on the rolled material 13 fed from the rolling roll 12 by the 11 to reduce the warp of the rolled sheet 13 while continuously feeding the rolled sheet 13,
The warp can be easily controlled to 200 mm or less. In addition, the gap between the warp control plate 11 and the roller table 26 is a rolled material.
If the thickness of the rolled material 13 is made substantially equal, the warpage of the rolled material 13 can be made substantially zero. Furthermore, stopper 32
By using the, it is possible to adjust the position of the warp control plate 11, so even if the rolling roll 12 is changed to a different diameter, the gap between the rolling roll 12 and the warp control plate 11 is kept constant. Therefore, it is possible to maintain a constant warp control capability.

In the warpage control device for rolled material according to the embodiment of the present invention, since it is possible to reduce the warpage of the rolled material 13, the height of the heat insulating cover that covers the passage area of the rolled material 13 is made extremely low. be able to. Therefore, the ability of the heat insulating cover to keep the rolled material 13 warm can be significantly increased. The warp regulation plate 11 in this embodiment can also have a function as a heat insulation cover by installing a heat insulating material on the side surface and the upper surface thereof. In this case, the heat insulating cover is partially formed by the warp regulating plate 11, and the rest is installed on the downstream side of the warp regulating plate 11 in the rolled material feeding direction.

Further, when the rolled material 13 comes into contact with the warp regulation plate 11, a warp may occur on the warp regulation plate 11, in which case, between the lower surface of the warp regulation plate 11 and the rolled material 13, A plurality of rolls whose rotation axis is orthogonal to the feeding direction of the rolled material 13 and are arranged in the feeding direction of the rolled material 13 are installed. Then, rolling plate 13
Warp control plate
It is possible to suppress the occurrence of eaves in 11.

EFFECTS OF THE INVENTION According to the present invention, since the regulating member that regulates the warp can be moved between the regulating position and the retracted position, the regulating member can be retracted from the rolling roll when the rolling roll is replaced. Therefore, it is possible to prevent the restriction member from becoming an obstacle, and it is possible to replace the rolling roll easily and quickly. Therefore, at the time of rolling, this regulating member can be installed near the rolling roll. Along with this, while continuously feeding the rolled material, it is possible to apply a large pushing force to the rolled material to regulate the warping before a large warp occurs in the rolled material. Therefore, the warp of the rolled material can be stably reduced to 200 mm or less without lowering the production efficiency. Further, since the regulation member has a stopper that comes into contact with the housing of the rolling mill and positions the regulation position, and the lining member is provided on the contact surface at the tip of the regulation member so that it can be exchanged, the lining member has a predetermined thickness. The height of the regulating member can be accurately set by a very simple method of bringing the stopper into contact with the housing,
Along with this, an appropriate pushing force can be applied to the rolled material.

[Brief description of drawings]

FIG. 1 is a side view showing a warpage control device for rolled material according to an embodiment of the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 to 6 are schematic views showing a conventional device. 11; Warp control plate, 12; Roll, 13; Rolled material, 14, 15; Support arm, 16; Connecting member, 17, 25; Cylinder, 18, 19, 2
0, 24; coupling pin, 21; roll cooling header, 22; wiper, 2
3; Stripper guide, 26; Roller table, 31; Housing, 32; Stopper, 33; Lining, 34; Mounting member, 35; Chain

Front page continuation (72) Inventor Takuya Terauchi 161-1, Tsunoshita, Daimon-cho, Fukuyama-shi, Hiroshima (72) Inventor Shohei Ono 4-137, Aobadai, Fukuyama-shi, Hiroshima (56) Reference JP-A-58-81509 (JP, A) Actual opening Sho 56-117921 (JP, U) Actual opening Sho 57-64709 (JP, U) Actual opening Sho 59-153010 (JP, U)

Claims (1)

[Claims] 1. A warpage control device for a rolled material, which is installed near the exit of a rolling roll in a rolling mill and regulates the warpage of the rolled material, wherein the rolled material is moved upward above a passage area of the rolled material. A restricting member arranged so as to be restrictable, and a moving unit that moves this restricting member between a restricting position near the exit of the rolling roll and a retracted position separated from the rolling roll,
The restricting member has a stopper that comes into contact with the housing of the rolling mill to position the restricting position, and the stopper has a replaceable lining member provided on the contact surface. A warpage control device for a rolled material, characterized in that the height of the control member at the control position is adjusted by adjusting the thickness of the member.