JPS62104606A - Device for controlling camber of rolled material - Google Patents

Abstract

PURPOSE:To permit easy and quick exchange of rolling rolls by constituting a control member for controlling camber in such a manner that the member can move between a control position and retreat position. CONSTITUTION:A piston of a cylinder 25 is advanced to install a wiper 22 and a roll cooling header 21 at a prescribed position. A lining 33 having a suitable thickness is fitted to a stopper 32 so that the spacing between the end of a camber control plate and the rolling rolls 12 attains a prescribed length. A piston of a cylinder 17 is then advanced to move the plate 11 until the lining 33 contacts a housing 31. After the plate 11 is installed at the prescribed position, the rolls 12 are rotationally driven then a rolling stock is supplies and rolling is started. The rolled material 13 emitted from the rolls 12 is fed in an arrow 36 direction. The camber of the material 13 is controlled as the material 13 is pressed to the plate 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a warpage regulating device for rolled material that suppresses warpage of rolled material occurring at the outlet of a rolling stand in a hot strip mill or the like.

[Prior art and its problems] In a hot rolling process, a rolled material having a thickness of 200 to 300 m is normally fed from a heating furnace or a continuous casting line to a hot strip mill. In a hot strip mill, the rolled material is rolled to a thickness of 20 to 60 #I while passing through three to five rough rolling stands, and then sent to a finishing mill. In this case, the rolled material is greatly warped upward at the exit of the rolling stand, and this warp is 300 mm.
If it exceeds the rolling stand, it may become impossible for the rolled material to fit into the next rolling stand. Particularly, in the case of direct rolling (HDR), in which a slab cast by a continuous casting machine is directly fed to a hot rolling mill without passing through a heating furnace, this warpage is significant. Furthermore, 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 retention effect of the rolled material, it is necessary to place the heat insulating cover as close to the rolled material as possible, but if the heat insulating cover is brought close to the rolled material, there is a risk that the heat insulating cover will be damaged due to upward warping of the slab. Normally, in order to obtain the required heat insulation effect, this heat insulation cover must be placed 200mm from the rolled material.
Installed within +. Therefore, it is necessary to make the upward warpage of this rolled material smaller than 200 m. This upward warping has a certain tendency depending on the material temperature, material quality, etc. However, by simply selecting the rolling conditions, the warpage of the rolled material can be stably suppressed for 200 m.
It is difficult to suppress it to a smaller value. Therefore, conventionally, various means have been used to mechanically correct or control the warp of rolled material that occurs at the exit of the rolling mill.

The simplest correction means is a technique of correcting the warp of the rolled material by lowering a weight of about 10 to 20 tons suspended from a crane onto the warped part of the rolled material. However, in order to reduce the warpage to less than 200+s, this weight must be held on the rolled material for 1 to 2 minutes, during which time the temperature of the slab will rise to about 50°C.
As a result, rolling becomes impossible in the case of HDR material, which poses a problem.

Further, a technique has been proposed for preventing warping of rolled material using a regulation guide.

FIG. 3 is a schematic diagram showing a technique for regulating the warpage of the rolled material 2 by means of a warpage regulating guide 3 for the rolled material, which is located above the rolled material 2 and attached to the housing 4 of the rolling mill.

This technique attempts to control the warpage of the rolled material 2 by bringing the upwardly warped rolled material 2 into contact with the lower surface of the warpage regulation guide 3. However, in this technology, a rolling roll cooling header that sprays cooling water onto the rolling roll 1 and movable parts such as wipers that prevent the cooling water from splashing onto the rolled material 2 are installed in the housing 4 of the rolling mill. Therefore, the mounting position of this warpage regulating 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 control guide 3, making it impossible to control warpage. Also, as shown in Figure 4,
In addition to the warpage control guide shown in Fig. 3, install an auxiliary member 5 near the roll, within a range that does not interfere with the movement of the rolling roll cooling header and wiper, and add the warp control guide there. However, there is still a risk that the slab may deviate from the warp regulation guide.

Furthermore, a technique has been proposed for correcting the warpage of a rolled material using a correction guide.

FIG. 5 is a schematic diagram showing a technique for correcting the warpage of a rolled material using a warp correction guide 6 fixed on the table 7 for feeding the rolled material. Warp correction guide 6 and roll table 8
The gap is wide on the side where the rolled material is inserted and gradually narrows toward the rolling material feeding direction, and the warpage of the rolled material 2 is corrected while the rolled material 2 passes through this warp correction guide 6. This is a technique that attempts to correct it. In this case, the upwardly warped rolled material 2 presses against 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, the force applied to the rolled material from the warp correction guide 6 is about 20. Since the coefficient of friction between the rolled material and the correction guide is about 0.1, the pushing force against the rolled material 2 is about 2". However, , this value is 500mm
This corresponds to the pushing force that corrects the upward curvature to 400JII11, and it is equivalent to the pushing force required to correct the upward curvature of 500 JII to 200.
Since the pushing force is extremely lower than the pushing force of 0 to 50 totu, the upward warpage cannot be corrected to 200 IlII or less.

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, it is possible to obtain a large pushing force against a warped rolled material, 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 the rolled material 2 is
Since it is necessary to apply an indentation force to the rolled material, there are problems in that production efficiency is reduced and the temperature of the rolled material 2 is reduced, making rolling difficult.

This invention was made in view of such circumstances, and
It is an object of the present invention to provide a warpage regulating device for rolled material that can reduce the warpage of a slab at the exit of a rolling stand by maintaining the temperature of the rolled material within a predetermined range without reducing production efficiency. do.

[Means for Solving the Problems] A warpage regulating device for rolled material according to the present invention is a warpage regulating device for rolled material that is installed near the exit of a rolling roll to regulate warpage of the rolled material. A regulating member installed above the area and capable of regulating upward movement of the rolled material, and a moving means for moving the regulating member between a regulating position near the exit of the rolling roll and a retreat position. Features.

Furthermore, by disposing a stopper having a replaceable lining on the side of the regulating member, the stopper can come into contact with the housing of the rolling mill to determine the position of the regulating member.

Furthermore, when the regulating member has heat insulating properties, the rolled material can be kept warm.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

FIG. 1 is a side view showing a warpage regulating device for rolled material according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. The rolling rolls 12 are disposed vertically opposite each other, and roll the material by biting it. The rolled material 13 coming out of the rolling roll 12 is fed on the roller table 26 in the direction of an arrow 36. In the vicinity of the exit of the rolling roll 12, above the passage area of the rolled material 13, a warpage regulating device for a rolled material according to an embodiment of the present invention is installed.

The connecting member 16 is installed above the passage area of the rolled material with its longitudinal direction being horizontal. As shown in FIG. 2, this connecting member 16 is attached to a mounting member 34 fixed to a housing 31 that accommodates a rolling stand. The support arms 14 and 15 have the same length and are rotatably connected at their upper ends to a connecting member 16 by a connecting pin 19. The warp regulating plate 11 is rotatably supported by the support arms 14 and 15 through its connecting pin 18 . The support arms 14 and 15 allow the warp regulating plate 11 to swing slightly about the connecting member 16 while maintaining its horizontal state.

The cylinder 17 is located above the connecting member 16,
It is fixed to the housing 34 with its piston portion facing downward. The tip end of the piston of the cylinder 17 is connected to the support arm 14 by a coupling pin 20. The binding bin 20 is located on the side of the binding bin 19,
The support arm 14 can be rotated about the coupling pin 19 by moving the piston of the cylinder 17 in and out. In this case, support arm 1
The insertion hole of the coupling bottle 20 formed in the coupling bottle 2
0 in the direction of the arrow 36, and as the piston of the cylinder 11 moves up and down, the coupling bottle 20 moves within the hole and the support arm 14 rotates smoothly. . Since the distance between the coupling pins 18 and 19 on the support arms 14 and 15 is the same, the cylinder 1
By retracting the piston 7 and rotating the support arm 14 in the direction of the arrow 29, the warp regulating plate 11 moves in the direction of the arrow 27 while maintaining its horizontal position, and reaches the retracted position shown by the dashed line. evacuate to. On the other hand, by advancing the piston of the cylinder 17 from this state, the warp regulating plate 11 moves in a diagonally downward direction 28 to the regulating position shown by the solid line.

The stopper 32, as shown in FIG.
are placed on both sides. A replaceable lining 33 is attached to the stopper 32 so as to face the housing 31. The lining 33 moves toward the housing 31 and comes into contact with it, thereby determining the positional relationship between the warp regulating plate 11 and the rolling roll 12. In this case, by replacing the lining 33 with one having a different thickness, the position of the warp regulating plate 11 can be set arbitrarily.

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 coupling pin 24 . Since the fulcrum (coupling bin 24) of the stripper guide 23 is eccentric, the stripper guide 23 is urged to rotate in the direction of the arrow 37 by its gravity. In addition, this stripper guide 23 includes
A roll cooling header 21 and a wiper 22 are attached. The roll cooling header 21 is installed at a portion of the stripper guide 23 facing the rolling roll 12, and is configured to inject cooling water toward the rolling roll 12 to cool the rolling roll 12. The wiper 22 is installed below the roll cooling section header 21 , and its tip comes into contact with the rolling roll 12 due to the biasing force acting on the stripper guide 23 , so that the cooling water from the roll cooling header 21 is applied to the rolled material 13 . This is prevented. A hydraulic cylinder 25 is installed above the stripper guide 23 with its piston facing downward. A chain 35 connected to the tip of the piston of this cylinder 25 is connected to the upper end of the stripper guide 23. When replacing the rolling rolls, by retracting the piston of the cylinder 25, the stripper guide 23 rotates in the direction of arrow 30 around the coupling bin 24, and the roll cooling header 21
And the wiper 22 is retracted. Further, in this case, since the warp regulating plate 11 is retracted in the direction 27 as described above, the warping regulating plate 11, the support arm 14, etc. do not interfere with the replacement of the rolling rolls.

Next, the operation of the device configured in this way will be explained. First, the piston of the cylinder 25 is advanced, and the wiper 22 and the roll cooling header 21 are installed at predetermined positions. Next, a lining 33 of an appropriate thickness is fitted into the stopper 32 so that the gap between the end of the warp regulating plate 11 and the rolling roll 12 is a predetermined length. and cylinder 17
The piston is advanced to move the warp regulating plate 11 until the lining 33 comes into contact with the housing 31. After installing the warp regulating plate 11 at a predetermined position, the rolling roll 12
is driven to rotate, and a rolling material is supplied to this rolling roll 12 to start rolling. The rolled material 13 coming out of the rolling roll 12 is fed in the direction of the arrow 36, and at the exit of the rolling roll 12, the rolled material 13 is pressed against the warpage regulating plate 11, thereby regulating the warping of the rolled material 13.

Next, in the garment rolling process, when changing the rolling roll 12 to one with a different diameter, the piston of the cylinder 17 is moved back and forth, the support arm 14 is rotated in the direction of the arrow 29, and the warpage regulating plate 11 is rotated. is evacuated in the direction of arrow 27. Then, by retracting the piston of the cylinder 25, the stripper guide 23 is rotated, and the wiper 22 and the roll cooling head 21 are retracted in the direction of the arrow 30. Then, when the rolling roll replacement work is completed, the wiper 22 and the roll cooling header 21 are advanced as described above, the warp regulating plate 11 is moved to the regulating position, and rolling is resumed.

As described above, since the warp regulating plate 11 has a retractable structure, there is no fear that roll replacement will be inhibited by the warping regulation #fi11, and the warping regulating plate 11 can be installed near the rolling roll 12 during rolling. It becomes possible. Therefore, a large pushing force acts on the rolled material 13 fed from the rolling rolls 12 by the warp regulating plate 11, and the rolling material 13 is
3 can be continuously fed while the upward warpage of the rolled plate 13 can be reduced, and the warpage of the rolled material 13 can be easily controlled to 200a or less. Further, by making the gap between the warp regulating plate 11 and the roller table 26 approximately equal to the thickness of the rolled material 13, it is possible to reduce the warpage of the rolled material 13 to approximately zero. Furthermore, by using the stopper 32, the position of the warp regulating plate 11 can be adjusted, so even if the rolling roll 12 is changed to one with a different diameter,
The gap between the rolling roll 12 and the warpage regulating plate 11 can be kept constant, and a constant warpage regulating ability can be maintained.

In addition, in the rolled material warpage regulating device 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 insulation 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 regulating plate 11 in this embodiment can also have a function as a heat retaining cover by installing a heat insulating material on its side and upper surfaces. In this case, a part of the heat insulation cover is formed by the warp regulating plate 11, and the remaining part is installed downstream of the warping regulating plate 11 in the rolling material feeding direction.

In addition, when the rolled material 13 comes into contact with the warp regulating plate 11, an eave may be formed on the warping regulating plate 11. In that case,
A plurality of rolls whose rotating shafts are perpendicular to the feeding direction of the rolled material 13 and are arranged in the feeding direction of the rolled material 13 are installed between the lower surface of the warp regulating plate 11 and the rolled material 13. Then, since the rolled plate 13 moves while being transferred to this roll, it is possible to suppress the occurrence of eaves on the warp regulating plate 11.

[Effects of the Invention] According to the present invention, since the regulating member for regulating warpage can be moved between the regulating position and the retracted position, the regulating member can be retracted from the rolling roll when replacing the rolling roll. This prevents the regulating member from becoming an obstacle, and allows the rolling roll to be replaced easily and quickly. Therefore, during rolling, this regulating member can be installed near the rolling rolls. Accordingly, while continuously feeding the rolled material, it is possible to control warping by applying a large pushing force to the rolled material before a large upward warpage occurs in the rolled material. Therefore, without reducing production efficiency and while maintaining the temperature of the rolled material within a predetermined range,
The warpage of the rolled material can be made extremely small, and the warpage of the rolled material can be stably kept at 200 m or less.

[Brief explanation of drawings]

FIG. 1 is a side view showing a warpage regulating 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 diagrams showing a conventional device. 11: warp regulating plate, 12; rolling roll, 13: rolled material,
14.15; Support arm, 16: Connection member, 17.25
Niji Linda, 18.19.20.24; Bin Bin, 21
: Roll cooling header, 22; Wiper, 23; Stripper guide, 26: Roller table, 31; Housing, 3
2: Stopper, 33; Lining, 34; Mounting member, 3
5; Chain Applicant's Representative Patent Attorney Takehiko Suzue Figure 1 Figure 2 Figure 4 Figure 5 Figure 6

Claims (3)

[Claims] (1) In a rolled material warpage regulating device that is installed near the exit of a rolling roll to restrict warping of the rolled material, a regulating member that is installed above the passage area of the rolled material and is capable of regulating the upward movement of the rolled material and a moving means for moving the regulating member between a regulating position near the exit of the rolling roll and a retracted position. (2) A patent claim characterized in that the regulating member is provided with a stopper having a replaceable lining on its side, and the stopper abuts against the housing of the rolling mill to determine the position of the regulating member. A warpage regulating device for a rolled material according to item 1. (3) The warpage regulating device for a rolled material according to claim 1, wherein the regulating member has a heat insulating property and keeps the rolled material warm.