JPH081221A - Rolling mill with function straightening camber - Google Patents

Abstract

PURPOSE:Not only to straighten camber occurring in a rolling process without performing a leveling operation, where a rolling stock is rolled by a rolling mill, but also to secure the passing property of the rolling stock, and to improve the yield of a plate width. CONSTITUTION:In a rolling mill by which a rolling stock is horizontally rolled by a horizontal rolling roll, at least a pair of inlet side vertical rolls 6a and 6b arranged respectively on both end sides in the plate width direction of the rolling stock on the inlet side of the horizontal rolling roll, which is movable in the plate width direction, with a rotary shaft in the plate thickness direction of the rolling stock, coming into contact with both ends in the plate width direction of the rolling stock without being press-contact at the time of horizontal rolling, and whose rotary shaft is fixed, is provided. A least a pair of outlet side vertical rolls 5a and 5b arranged respectively on both end sides in the plate width direction of the rolling stock on the outlet side of the horizontally rolling roll, which is movable in the plate width direction, with a rotary shaft in the plate thickness direction of the rolling stock, coming into contact with both ends in the plate width direction of the rolling stock without being press- contact at the time of horizontal rolling, and whose rotary shaft is fixed, is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill having a camber straightening function provided with a technique for straightening a camber generated in a rolling process of a rolled material.

[0002]

2. Description of the Related Art Conventionally, metal sheet materials have been manufactured by rolling with a rolling mill. Among such rolling processes, for example, in the rough rolling process and plate process of hot rolling,
Bending called a camber that bends in a direction perpendicular to the length and thickness direction of the rolled material may occur. If a camber occurs, the yield will decrease due to the deterioration of width dimension accuracy.
In an extreme case, it may not be possible to pass the strip on the next rolling mill.

The cause of such a camber is that the thickness distribution, hardness distribution or temperature distribution of the rolled material in the sheet width direction is not uniform, the leveling of the rolling rolls is defective, and the center of the rolled material and the rolling machine in the width direction. It is generally known that misalignment (off-center), skew of the rolled material with respect to the rolling direction, and the like. Due to these factors, the rolling load distribution of the rolling rolls in the plate width direction with respect to the rolled material becomes non-uniform, and there is a difference in opening between the roll gaps on the left and right sides of the rolling mill, resulting in camber.

Conventionally, two types of countermeasures have been made for the occurrence of camber due to the difference in roll gap opening. That is, there are a method of horizontally rolling so that the camber does not occur itself and a method of correcting the camber even if it occurs in the horizontal rolling.

First, as one of the methods for horizontal rolling so as to prevent the occurrence of camber, conventionally, the side guides set on both sides of the rolled material are wider by about 50 mm than the width of the rolled material on the entrance side of the rolling mill. A method is widely used in which the degree of opening is adjusted so that the rolled material is guided to the center of the rolling mill to reduce the off-center and skew of the rolled material. However, in this method, the side guide opening must be set wider than the rolling strip width as described above in order to prevent the occurrence of scratches, passing defects, and the like due to strong contact of the rolled material with the side guides. Moreover, it is impossible to prevent the occurrence of camber due to factors other than off-center and skew of the rolled material. Therefore, this method can prevent a large bend, but cannot obtain any further effect.

Next, as another method of horizontally rolling so as to prevent the occurrence of camber, conventionally, a leveling operation for actively controlling the difference between the left and right roll gap openings of the work rolls causing the camber is performed. The method called is used.

In the leveling operation, for example, first, a computer estimates the amount of wedges and the amount of camber, which are uneven distributions of the plate thickness in the plate width direction, from the rolling load difference detected by the left and right load cells of the horizontal rolling mill. From the estimated wedge amount and camber amount, the roll gap opening difference required to correct this is calculated, and the leveling operation is performed. In order to suppress the camber, it is required that the work roll be responsive to the operation of the work roll. Therefore, a hydraulic rolling mill having a high response is used.

Further, the leveling operation suppresses the generation of camber and at the same time causes the generation of wedges, and the rolled material subjected to the leveling operation has a wedge which is the cause of generation of camber in the next rolling. Therefore, the rolled material subjected to the leveling operation can more accurately suppress the camber by detecting the wedge amount before horizontal rolling.

In such a rolling mill, wedge gauges for measuring the plate thickness at both ends of the rolled material are installed. In addition, changes in the roll gap opening during rolling due to changes in the deformation resistance in the plate width direction caused by temperature differences in the plate width direction, differences in horizontal rigidity of the mill, roll crown shapes, and differences between upper and lower work roll shifts also cause wedges and camber. Since this is a cause, it is necessary to install a large number of various sensors for investigating these and perform complicated control based on each factor. Therefore, the camber generation suppressing mechanism by the leveling operation is very complicated.

However, since the load change due to the leveling is superimposed on the cross-sectional shape of the rolled material itself and the difference between the left and right rolling load levels due to the temperature difference in the plate width direction, the accurate wedge amount and camber amount are detected. It is difficult and not fully effective.

On the other hand, as a method for correcting the camber even if it occurs in horizontal rolling, the methods disclosed in JP-A-61-212418 and JP-A-5-293528 are known.

FIG. 5 is a block diagram showing a horizontal rolling mill having a camber straightening function disclosed in JP-A-61-212418. In FIG. 5, the rolled material 21 is running in the direction of the arrow in the figure, and after being horizontally rolled by the entry-side vertical rolling mill 22 to a predetermined strip width, the horizontal rolling mill 23 is used. Is rolled into a predetermined plate thickness. When the camber is generated, the camber meter 24 detects the camber generation, and the exit side vertical rolling mill 25a or 25b corrects the camber. For example, FIG. 5 shows a case where a camber is generated on the left side with respect to the running direction of the rolled material (the direction of the arrow in the drawing), and this camber applies a bending moment in the correcting direction by the exit vertical rolling mill 25b. Have been corrected.

On the other hand, FIG. 6 is a block diagram showing a horizontal rolling mill having a camber correcting function disclosed in Japanese Patent Laid-Open No. 5-293528. In FIGS. 6A and 6B, rolled material 3
1 is running in the direction of the arrow in the figure, and is a vertical rolling mill 32.
After it is rolled to a predetermined plate width from the left and right by a horizontal rolling mill 33, it is rolled to a predetermined plate thickness. In this rolling mill, movable side guides 34, 35, 36 are provided on the entry side of the vertical rolling mill 32, between the vertical rolling mill 32 and the horizontal rolling mill 33, and on the exit side of the horizontal rolling mill 33, respectively. As the rolled material 31 advances, the side guide width is controlled in the order shown in FIGS. 6 (a) and 6 (b).

First, when the rolled material 31 is in a state as shown in FIG. 6 (a), that is, the tip portion is a horizontal rolling mill 33.
When the trailing end has not passed through the vertical rolling mill 32, the side guides 36 are held on the horizontal rolling mill exit side at intervals of 10 to 20 mm wider than the rolled material width, and on the horizontal rolling mill entry side. Since it is held by the die rolling mill 32, the camber amount is corrected by the side guide 36 so as to be within a certain range. Next, after the rear end of the rolled material 31 has passed through the vertical rolling mill 32, the side guides 35 and 36 are held at an interval that is 10 to 20 mm wider than the width of the rolled material. , 36 corrects it so that it falls within a certain range.

[0015]

By the way, when an attempt is made to correct the camber by applying a force from one end of the width direction end of the rolled material plate on the exit side of the horizontal rolling mill, on the entrance side of the horizontal rolling mill,
It is known from experiments that the rolled material moves to the end side where a force is applied. This is shown in FIG. It is considered that this phenomenon occurs because the strain difference in the rolling direction occurs due to the non-uniform tension distribution in the rolling material width direction generated by the correction force.

Therefore, in the case of applying a force to the rolled material on the outlet side of the horizontal rolling mill to correct the camber, the rolled material is sufficiently pressed on the inlet side of the horizontal rolling mill in order to obtain a sufficient camber straightening effect. There must be.

In the apparatus disclosed in Japanese Patent Laid-Open No. 61-212418, an inlet side vertical rolling mill 22 is used to hold down the rolled material. On the other hand, the entry-side vertical rolling mill 22 is
The edge portion of the plate width is positively plastically deformed to form a thick portion of the edge portion of the rolled material called dog bone symmetrically at both ends of the rolled material. However, as mentioned above,
When a bending moment is applied to the output side vertical rolling mill 25a or 25b, a force is applied to one side of the input side vertical rolling mill 22 by the addition of this moment, so that the dog bone is formed asymmetrically or only on one side of the rolled material edge. Will not be done. However, if the dogbone is asymmetrical or formed only on one side, the spread after horizontal rolling becomes asymmetrical, which in turn causes uneven strip width, camber, and meandering.

Further, in JP-A-61-212418,
The meandering correction is performed together with the camber correction. The meandering correction is performed by the horizontal rolling mill 23 based on the pressure difference detected by the pressure detectors (not shown) installed in the left and right vertical rolling mills 22. Is performed by the leveling operation.
However, as described above, the rolled material 21 is used for straightening the camber.
When a force in the width direction is applied to, the value detected by the pressure detector becomes a value different from that based on the meandering, which causes a problem that an erroneous leveling operation is performed.

On the other hand, in the device disclosed in Japanese Patent Laid-Open No. 5-293528, the side guide 3 is used as a camber correcting means.
5, 36 and a vertical rolling mill 32 are used. First, in the state of FIG. 6 (a), the pattern when the camber correction is performed on the outlet side of the horizontal rolling mill is disclosed in Japanese Patent Laid-Open No. 61-2124.
It is the same as No. 18 and has the same problem.

Next, when the trailing end of the rolled material has passed through the vertical rolling mill 32, that is, in the state shown in FIG. 6B, the side of the horizontal rolling mill is pressed by the side guide 35. However, since the section where the rolled material 31 and the side guide contact each other is considerably long, the rolled material 31 and the side guides 35 and 36 cannot be brought into close contact with each other in order to reduce scratches and frictional resistance, and the side guide width direction spacing is It is held at intervals of 10 to 20 mm wider than the width of the rolled material. In this case, the edges of the rolled material in the width direction before and after the horizontal rolling mill are in a free state and are not sufficiently pressed on the entrance side of the horizontal rolling mill. Even if correction by 36 is performed, up to 20 m
There is a possibility that a camber of m will occur, and actually,
According to the example of No. 293528, the camber amount could be suppressed to 20 mm or less.

Further, as in the apparatus of Japanese Patent Laid-Open No. 5-293528, as long as a side guide is used as the camber straightening means, the rolled material and the camber straightening are caused due to the problems of scratches and frictional resistance as described above. The means (that is, the side guide) is closely attached, and the camber amount is 0 mm.
(Or a small value of about 10 mm or less) cannot be set.

The reason why a difference in camber amount of about several tens of mm is a problem will be described below. The rolled plate is
Due to the occurrence of camber or the like, both edge portions in the width direction are cut off (this is called trimming), and the trim margin is larger as the camber amount is larger. At first glance, 10-20m
It seems that the trim margin (camber amount) of about m is not a big waste, but the annual crude steel production in Japan is about 100 million tons, and the hot rolled material is the main product in the steel industry, which has large scale merit. As a product, if the amount of camber and hence the trim allowance can be reduced by 1 mm, there is a great economic advantage. For example, at a hot rolling plant at a steel mill, 200
Assuming that 10,000 tons of hot-rolled material is produced, and the camber amount can be reduced by 1 mm by some technical means, the width of the rolled material is set to 1 m, and the price per ton of the final product is 50,000. Assuming that it is a yen, it will save 100 million yen per year. If the amount of camber can be reduced by 10 mm under the same assumption, it will save 1 billion yen per year.

The present invention has been made in view of such a situation, and corrects a camber generated in a rolling process of rolling a rolled material without using a leveling operation, thereby ensuring the sheet passing property of the rolled material. An object of the present invention is to provide a rolling mill having a camber straightening function that improves the plate width dimension accuracy and improves the product yield.

[0024]

In order to solve the above-mentioned problems, the invention corresponding to claim 1 is a rolling mill for horizontally rolling a rolled material with a horizontal rolling roll. Each of them is arranged at both ends in the strip width direction, is movable in the strip width direction, has a rotation axis in the strip thickness direction of the rolled material, and makes contact with both ends in the strip width direction of the rolled material without pressure contact during horizontal rolling, and At least one pair of entry-side vertical rolls having fixed rotating shafts, and each of the exits of the horizontal rolling rolls are disposed at both ends in the strip width direction of the rolled material, and are movable in the strip width direction and in the sheet thickness direction of the rolled material. A roll having a camber straightening function, which has a rotary shaft in the horizontal direction, and which is in contact with both ends in the plate width direction of the rolled material without pressure contact during horizontal rolling, and has at least one pair of output side vertical rolls to which the rotary shaft is fixed. It is a machine.

The invention corresponding to claim 2 is a rolling mill in which a rolled material is end-rolled by a vertical rolling roll and then the rolled material is horizontally rolled by a horizontal rolling roll. It is arranged adjacent to the horizontal rolling rolls on both ends of the strip in the width direction of the strip, is movable in the strip width direction, has a rotation axis in the strip thickness direction of the strip, and when rolling horizontally, At least one pair of inward vertical rolls, which are in contact with each other without pressure contact and whose rotation axis is fixed, and at the output side of the horizontal rolling rolls, adjacent to the horizontal rolling rolls at both ends in the plate width direction of the rolled material, respectively. At least 1 that is arranged, is movable in the plate width direction, has a rotation axis in the plate thickness direction of the rolled material, and is in contact with both ends of the rolled material in the plate width direction without pressure contact during horizontal rolling, and the rotation axis is fixed. A camber straightening function with a pair of output side vertical rolls Is a rolling mill to be.

[0026]

Therefore, first, in the rolling mill having the camber straightening function of the invention according to claim 1, the rolled material rolled by the horizontal rolling rolls has the vertical rolls on the inlet and outlet sides when the camber does not occur. Since they are in contact with each other without pressure, they continue to flow. Each vertical roll is
Since it has a columnar shape, it is in point contact with the rolled material and does not damage the rolled material or interfere with rolling due to frictional resistance.

When a camber is generated in the rolled material, the vertical rolls are fixed and in contact with each other from both sides of the rolled material, so that the camber can be corrected. That is, a bending force is applied to the rolled material by the output side vertical roll. At this time, the entry vertical roll is fixed so that the rolled material does not move in the plate width direction. It is known that when a force is applied to the rolled material during rolling from the strip width direction, the rolled material can be bent with a small force, and this force is large enough not to cause plastic deformation at the edges of the rolled material. Therefore, the rolled material is not deformed by the incoming vertical roll.

Further, in the rolling mill having the camber straightening function of the invention according to claim 2, in addition to the effect of the invention according to claim 1, since the vertical roll of the inlet / outlet side is installed adjacent to the horizontal rolling roll. It is possible to straighten even the most advanced part of the rolled material and the end part.

[0029]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic plan view of a rolling mill having a camber straightening function according to the present embodiment as seen from above, and FIG. 2 is an elevational schematic view of the rolling mill as seen from the rolled material delivery side.

In the horizontal rolling mill housing 10, work rolls 3a, 3b for horizontally rolling the rolled material 1 supported by the frames 10a, 10b by work roll chocks 7a, 7b, and the work rolls 3a,
A pair of backup rolls 4a and 4b for urging 3b toward the rolled material 1 are incorporated.

Further, the work roll 3 in each of the frames 10a and 10b constituting the horizontal rolling mill housing 10.
A pair of entry side vertical rolls 6a, 6b that hold the rolled material 1 at the entry side positions of a and 3b so that the rolled material 1 does not move during camber straightening.
Are attached via support members 12a and 12b (not shown).

On the other hand, a pair of output side vertical rolls 5 for correcting the camber of the horizontally rolled material 1 at the output side positions of the work rolls 3a, 3b in the respective frames 10a, 10b.
a and 5b are attached via support members 12c and 12d.

Each of the support members 12a to 12d has the same structure, and as shown in FIG. 2, each of the vertical rolls 5a, 5b, 6a,
The support arm 13 that supports 6b is fixed to each of the frames 10a and 10b via the hydraulic cylinder 8 and the load cell 9.

The hydraulic cylinder 8 has a function of moving the vertical rolls 6a, 6b, 5a, 5b on the inlet side and the outlet side at high speed in the width direction of the rolled material 1, and the load cell 9 has the inlet side and the outlet side. It has a function of measuring the load applied to each vertical roll 6a, 6b, 5a, 5b.

The input vertical rolls 6a, 6b and the output vertical rolls 5a, 5b are installed adjacent to the work rolls 3a, 3b. Further, the vertical rolls 6a, 6b on the inlet side and the outlet side,
A control device 11 that calculates the operation timing of 5a and 5b and controls the operation is connected via a horizontal rolling mill housing 10.

Further, a pair of edger rolls 2a, 2b for edge-rolling the rolled material 1 are arranged on the side of the horizontal rolling mill housing 10 in the direction of loading the rolled material 1. next,
The operation of the rolling mill having the camber straightening function configured as described above will be described with reference to the flowchart showing the operation of the present embodiment and FIG.

First, the rolled material 1 is the edger roll 2a,
The width is reduced by 2b (ST1). Next, using the rolling load signal (not shown) of the vertical rolling mill as a trigger, the edger rolling speed and the edger rolls 2a and 2b to the incoming vertical roll 6
From the distance between a and 6b, the time for the rolled material tip to pass through the entry side vertical roll and the time for reaching the work rolls 3a, 3b are calculated, and after the rolled material tip has passed the entry side vertical roll, the work roll 3a, The timing at which the entry side vertical rolls 6a and 6b can be set by the control device 11 is calculated before being bitten into the 3b (ST2). Immediately before the rolled material 1 bites into the work rolls 3a and 3b according to the timing (ST2) calculated in advance, the standby vertical rolls 6a and 6b are moved by the hydraulic cylinder 7 to move the rolled material 1 (ST3). Since the hydraulic cylinder 7 has high responsiveness, the above-described operation is possible. At this time, the entry-side vertical rolls 6a and 6b are fixed at positions that are symmetrical with respect to the center line of the horizontal rolling mill and that the distance between the rolls is the plate width calculated from the width reduction amount by the edger rolls 2a and 2b. Then, the rolled material 1 is centered online.

Subsequently, the rolled material 1 is processed by the work rolls 3a,
It is horizontally rolled at 3b (ST4) and sent out. Here, the rolling load signal (not shown) of the horizontal rolling mill is used as a trigger to determine the rolling speed and the distance between the work rolls 3a and 3b to the output side vertical rolls 5a and 5b. Calculated by the controller 11 (ST
5). The output side vertical rolls 5a and 5b are put in a standby state at the start of horizontal rolling, and the tip of the rolled material is set to the output side vertical rolls 5a and 5b.
Immediately after passing through the position of, the position is fixed in the width direction (ST6). At this time, the insertion positions of the output side vertical rolls 5a and 5b are symmetrical with respect to the center line of the horizontal rolling mill as in the case of the input side vertical rolls 6a and 6b. It is fixed so as to have a work roll exit side plate width calculated from the vertical roll interval, work roll diameter, rolled material entrance side plate thickness, and reduction ratio.

In the rolling mill having the camber straightening function which operates in this way, when a camber occurs, a bending moment is applied to the rolled material 1 by the output side vertical rolls 5a and 5b, and the camber is straightened. Work rolls 3a, 3
It is known that when a bending moment as described above is applied during horizontal rolling at b, bending can be performed with a small force, and the present invention utilizes this. These input side and output side vertical rolls 5a, 5b, 6a, 6b are in contact with each other without pressure contact in a state where no camber is generated, and the roll shaft is fixed during passage of the rolled material. When the occurrence occurs, the force applied to the input side and output side vertical rolls 5a, 5b, 6a, 6b is a reaction from the rolled material 1 and is only the minimum force required for straightening the camber. Therefore, this force affects the portion of the rolled material edge where plastic deformation has occurred, but is small enough not to cause local new plastic deformation. Side vertical rolls 5a, 5
No dogbone is formed by b, 6a and 6b. In addition, the incoming and outgoing vertical rolls 5a, 5b, 6a, 6
Since b is in contact with the rolled material and is fixed, even a slight camber can be corrected.

When the camber does not occur,
Since the incoming and outgoing vertical rolls 6a and 6b only contact the rolled material 1 without pressing it, the rolled material 1 continues to flow as it is. Since each vertical roll has a columnar shape, it is in contact with the rolled material 1 at a point and does not damage the rolled material or interfere with rolling due to frictional resistance.

As described above, the rolling mill having the camber straightening function according to the present embodiment is in contact with itself without pressure contact during passage of the rolled material, and the input and output vertical rolls 5a and 5b having the fixed roll shafts. , 6a, 6b are provided, the rolled material 1
It is possible to correct even a slight camber without forming a dog bone at the end portion, and yet to correct the camber without complicated control.

For example, in FIG. 4, a camera is installed immediately before the entrance of the vertical rolling mill (that is, the edger rolling mill), and how much the center is deviated from the vertical rolling mill when the edger rolls 2a and 2b are bitten (off-center amount). It is the figure which observed and inspected the maximum bending amount (maximum camber amount) obtained from the line in which the rolled material end part (drive side) of the rolled material 1 at this time was swallowed. When there is no straightening with vertical rolls, there is a correlation between the off-center amount on the vertical rolling mill entrance side and the maximum camber amount, but the straightening with the incoming and outgoing vertical rolls 5a, 5b, 6a, 6b in this example. It can be understood that in the case of, the camber hardly occurs regardless of the off-center amount, and the maximum camber amount is suppressed within ± 5 mm.

Further, as described above, the rolling mill having the camber straightening function according to the present embodiment is in contact with the edger rolls 2a and 2b for edge rolling without pressure contact during the passage of the rolled material to fix the roll axis. The input side and output side vertical rolls 5a, 5b, 6a, 6b which have been subjected to the work roll 3a,
Since it is provided inside the horizontal rolling mill housing 10 adjacent to 3b, in addition to the above effects, it is possible to correct even the leading edge and the trailing edge of the rolled material. In other words, after the rolled material tip has been bitten into the work rolls 3a and 3b, it passes through the exit side vertical roll position and is restrained by the exit side vertical rolls 5a and 5b, that is, the rolled material tip portion is the work roll 3
When it is between a, 3b and the output side vertical rolls 5a, 5b, the rolled material 1 cannot be straightened. Further, when the trailing end of the rolled material slips out, when the trailing end of the rolled material is between the work rolls 3a, 3b and the output side vertical rolls 5a, 5b, the straightening cannot be corrected, and the trailing end of the rolled material enters Even when it is between the vertical rolls 6a, 6b to the work rolls 3a, 3b, the incoming vertical rolls 6a, 6b
Since there is no holding down by, the correction effect is small. However,
In the rough rolling step of hot rolling, the front and rear ends of the rolled material often have sharp bend shapes called nose bend and tail bend due to width reduction by a vertical rolling mill (that is, an edger rolling mill). In this embodiment, the inlet and outlet vertical rolls 5a, 5b, 6
By arranging a and 6b in the horizontal rolling mill housing 10 immediately before and after the work rolls 3a and 3b, it is possible to correct even the leading edge and the rearmost end of the rolled material, and prevent bending of the nose and bending of the tail. be able to.

Further, in the present embodiment, the case where each of the inlet side and the outlet side vertical rolls 5a, 5b, 6a, 6b is one set has been described, but this may be a plurality of sets. When a plurality of sets of entry-side vertical rolls 6a and 6b are used, the force applied to each entry-side vertical roll during camber straightening becomes smaller, so that the occurrence of one-side dog bones is further difficult to occur. Further, when the output side vertical rolls 5a and 5b are provided in plural sets, the camber can be corrected more smoothly.

[0045]

As described above in detail, according to the present invention, the camber generated in the rolling process of rolling the rolled material is corrected without using the leveling operation, and the strip passing property of the rolled material is ensured, and the strip width is improved. It is possible to provide a rolling mill having a camber straightening function that improves dimensional accuracy and improves product yield.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a rolling mill having a camber straightening function according to the present embodiment, as viewed from above.

FIG. 2 is an elevational schematic view of the rolling mill as viewed from a rolled material delivery side.

FIG. 3 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between an off-center amount and a maximum camber amount between a rolled material and a vertical rolling mill.

FIG. 5 is a configuration diagram showing a conventional horizontal rolling mill having a camber straightening function.

FIG. 6 is a configuration diagram showing a horizontal rolling mill having a conventional camber straightening function.

FIG. 7 is an explanatory diagram showing movement of rolled material on the entrance side of the horizontal rolling mill when a force is applied from one end of the width direction end of the rolled material plate on the exit side of the horizontal rolling mill.

[Explanation of symbols]

1 ... Rolled material, 2a, 2b ... Edger roll, 3a, 3b
... Work rolls, 5a, 5b ... Outgoing vertical rolls, 6a, 6
b ... vertical side roll, 8 ... hydraulic cylinder, 10 ... horizontal rolling mill housing.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadakazu Masuda 1-2 1-2 Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd.

Claims (2)

[Claims] 1. A rolling mill for horizontally rolling a rolled material with horizontal rolling rolls, which is arranged at both ends of the rolled material in the plate width direction at the entrance side of the horizontal rolling roll and is movable in the plate width direction. At least one pair of inward vertical rolls having a rotating shaft in the plate thickness direction of the rolled material, contacting both ends of the rolled material in the plate width direction without pressure contact during horizontal rolling, and fixing the rotating shaft; , On the exit side of the horizontal rolling rolls are respectively arranged at both ends in the plate width direction of the rolled material, have a rotation axis in the plate thickness direction of the rolled material that is movable in the plate width direction, and during horizontal rolling, A rolling mill having a camber straightening function, comprising: at least one pair of exit side vertical rolls, which are in contact with both ends of a rolled material in the plate width direction without pressure contact and have the rotating shaft fixed thereto. 2. A rolling mill in which a rolled material is edge-rolled by a vertical rolling roll and then the rolled material is horizontally rolled by a horizontal rolling roll, wherein a rolling width direction of the rolled material is provided at an entrance side of the horizontal rolling roll. Each of them is arranged adjacent to the horizontal rolling rolls on both end sides, has a rotation axis in the plate thickness direction of the rolled material which is movable in the plate width direction, and at the both ends of the rolled material in the plate width direction during horizontal rolling. At least one pair of entry-side vertical rolls that are in contact with each other without pressure contact and to which the rotating shaft is fixed, and an exit side of the horizontal rolling roll that is adjacent to the horizontal rolling roll on both end sides in the plate width direction of the rolled material. And has a rotary shaft in the plate thickness direction of the rolled material, which is movable in the plate width direction, is in contact with both ends in the plate width direction of the rolled material without pressure contact during horizontal rolling, and the rotary shaft At least one pair of exit vertical shafts to which the Rolling mill having a camber correction function, characterized in that it comprises and.