JPS59215202A - Method for rolling thick plate in its width direction - Google Patents

Abstract

PURPOSE:To improve the accuracy of the plate width of a material to be rolled and to form it into an accurate shape by providing two pairs of vertical rolls to manipulators respectively and forming a caliber shape by adjusting the positions of these rolls in the thickness direction in accordance with the thickness of the material. CONSTITUTION:Manipulators 5, 5' provided with two pairs of vertical rolls 3, 4 and 3', 4' respectively are disposed near a plate mill. These rolls 3, 3' and 4, 4' are nondriven types, and are arranged alternately by setting the rolls 3, 3' in inverse T-types and the rolls 4, 4' in T-types to form a caliber corresponding to the thickness of a material 1 to be rolled by adjusting their positions in the thickness direction of material 1. When the biting of material 1 is first started at the biting position f-f by moving it to the direction of horizontal rolls 2, the locking mechanism 10 of a manipulator 5 actuates to fix the manipulator 5. Each of horizontal rolling reduction adjusting devices 12, 15 and a vertical one of the rolls 3, 4 actuate to start successively a rolling of material 1 in its width direction by subjecting both end and edge parts of the plate width of material 1 to rolling reduction. Next, the material 1 is subjected to rolling reduction in its width direction by the rolls 3', 4'.

Description

[Detailed description of the invention] The present invention relates to a method for rolling a thick plate in the width direction.

Generally, thick plates are rolled using a four-high reversible rolling mill, and in order to obtain various product widths from a constant slab width, the direction of the rolled material is changed by 90° during rolling, tenter rolling is performed, and then rolled again. The rolled material is rotated by 90 degrees and finished rolled to the thickness of the final finished product.

By the way, the rolling reduction rate immediately before this tentering rolling affects the width accuracy of the finished product, and if the rolling reduction rate is small, the longitudinal center of the rolled material 1 will have the maximum width WA, as shown in Fig. 1, and the width near both ends will increase. becomes the minimum width WI. When the rolling reduction ratio is large, the minimum width WI is at the center and the maximum width WA is at both ends, as shown in FIG.

In other words, this is due to the clog shape of the end of the rolled material during tentering rolling.If the thickness of the material is relatively thick during tentering rolling, it will become a "cylindrical shape" as shown in Figure 1, and if the material is thin, it will have a "cylindrical shape" as shown in Figure 2. In addition, the plate thickness changes in the width direction based on factors such as the relationship between the amount of roll deflection and the amount of roll crown, and roll wear. This causes misalignment and fluctuations in the width of the plate in the longitudinal direction, making it difficult to obtain good width accuracy of the finished product.

However, in either case, the minimum plate width during rolling is the maximum plate width that can be collected, and the product is cut into the thickest plate products with the maximum width within this range, resulting in a significant decrease in yield. I can't avoid it. Therefore, as a planar shape control rolling method, it is necessary to select the amount of plate thickness reduction before tentering rolling, or to improve the clog shape of the tip and rear ends of the rolled material that occurs during tentering rolling. Is it attempted to minimize the above-mentioned yield loss by changing the thickness of the material to be rolled in the rolling direction using a thickness control mechanism?
It is extremely difficult to make the plate width uniform in the longitudinal direction of the finished product with high precision.

In addition, even if it were possible to make the longitudinal width of the finished product exactly the same over the entire length, this must match the intended width of the finished product. It is necessary to accurately predict the rolling accuracy during rolling, and also the amount of width expansion during rolling in the longitudinal direction of the finished product. Furthermore, there are quality problems, since the end face of the rolled material is not forged by direct rolling, resulting in poor shape of the end face of the plate (bulges, edge drops, etc.), flaws such as folds, and material deterioration. Therefore, it is very difficult to set the strip width at the end of rolling as the target width of the finished product.In reality, the target width of the rolled strip is set by allowing for an allowance in the target width of the product.
In the post-process, the edge of the plate is cut to ensure the width accuracy of the final product.

As mentioned above, when rolling a thick plate, the width of the plate? The quality of the plow board (
It is extremely important not only in terms of shape, dimensions, and material, but also in terms of yield.

Conventionally, in order to reduce the width of thick plates, there are some factories that use a vertical rolling mill alone in the initial stage of plate rolling, but in recent years, for example, JP-A-52-109466 As in the method described in the publication, a vertical roll mill (Attached Edger) is installed in the vicinity of a conventional four-high reversible rolling method, and the end face shaping and strip width are controlled by the vertical rolls, including the final stage of rolling. Are known. Mata Tokko 1977
There is also a method, such as the method described in Japanese Patent No. 19683, in which vertical rolls are placed on manipulators placed before and after a plate rolling mill, thereby performing widthwise reduction.

However, installing an independent vertical roll device like the former requires expensive equipment costs.Although the latter method is advantageous in terms of equipment costs, it requires only a pair of vertical rolls. The rolling condition of the end of the rolled material is fixed, and the entire end including the end face and its vicinity of the rolled material is sufficiently forged according to changes in plate thickness, and even defects in shape of the end face of the plate are improved. It's powerful enough to do that.

The thick plate rolling method according to the present invention improves the plate width accuracy and obtains a plate width end face with an accurate shape and no defects.
This objective is achieved by providing a rolling method using lightweight and inexpensive equipment that aims to improve the yield by reducing cutting loss at the edge of the sheet width, and even omit the cutting process. In this method, at least two pairs of vertical rolls are provided facing each other on a manipulator placed close to a plate rolling mill, and the position of the vertical rolls is adjusted in the direction of the entire thickness depending on the thickness of the material to be rolled. By combining the rolls, a hole shape is formed in the rolling direction that completely surrounds the edge of the material to be rolled according to the thickness of the material to be rolled, and during rolling by the thick plate rolling mill, these vertical rolls add rolling metal in the width direction to reduce the width of the material. A method for rolling a thick plate in the width direction, which is characterized by complete correction.

The present invention will be explained below based on the drawings.

In the plan view of FIG. 3 and the side view of FIG. 4, 1 is a material to be rolled, and 2 is a horizontal rolling roll of a conventional 4-high reversible plate rolling mill. Vertical rolls 3.3 and 4, 4 are provided in front in the direction of force (arrow F), and two pairs of vertical rolls a/, 3/, and a, 4' are provided in the rear in the direction perpendicular to the rolling direction (however, as described later, (The vertical roll shape and arrangement method are not specified here). All of these vertical rolls are non-driven, and each pair of vertical rolls 4, 4 and 4', 4' has, for example, a pincushion shape (T-shape) in which the diameter of the upper end is a dog. Each pair of vertical rolls 33, 3', and 3' has a pincushion shape (upper mold) with a lower end that runs perpendicularly, and is movable up and down in response to changes in plate thickness. 3 and 4, and 3'
and 4' are installed in close positions. This example shows the case where two pairs of vertical rolls are installed in front and behind the horizontal roll in the rolling direction, but of course, two or more pairs of vertical rolls having T-shaped and 1-type pincushion shapes are installed alternately. You can also.

As for how to arrange the vertical rolls, as shown in FIG. 3', '3! , 4/ and 4/ are arranged, and their positions are arranged as close to the horizontal rolling rolls as possible. Code 6. σ is the rack frame that drives the manipulator 1, 7, 7 is the spindle shaft that drives the rack frame, 8, Bi is the reducer, 9.9' is the electric motor, 1o, 1
σ is a locking mechanism attached to the rack frame to secure the manipulator in place. All of the vertical rolls are non-driven, and 1.1 and 11' are vertical rolls 3, 3 and 3'.

3' Bearing chock for holding, 12. Ml' is a framed vertical loam bearing chock of manizolator 5.5']
1, 11' is a horizontal direction (plate width direction) rolling adjustment device using fluid pressure, and 13°13' is a bearing chain 1.1 which holds the vertical rolls 4, 4 and 4', 4'. 14.14' is a bearing chock 13 that holds the vertical roll.
, 13', 15°1 is a manipulator 5, and a horizontal reduction adjustment device for fluid pressure 16, which is installed in the gap between the frame of 5 and the outer box 14, 14'.
1flr is a bearing chock 13, 1 that holds the vertical roll.
3' is vertically moved within the outer box 14, 14' by a hydraulic or electrically operated vertical (thickness direction) reduction adjusting device mounted on the outer box 14, 14'. That is, the vertical rolls 3, 3 and 3', 3' are adjusted to protrude positions according to the amount of width reduction from the guide surface of the material to be rolled 1r7a of the manipulator 5, so as to roll the end surface of the material to be rolled. are placed facing each other. Vertical rolls 4, 4 and 4'.

4' is adjusted to a protruding position from the guide surface at the end of the rolled material 1 of the manipulator according to the amount of width reduction, and is also adjusted in the vertical direction (thickness direction) in response to changes in the thickness of the rolled material. Possibly, the upper and lower ends of the pincushion shape (T-type, upper mold) have dog-shaped diameter parts, so that the width end face of the material to be rolled and the edge part (part of the corner) can be forcibly restrained and rolled. They are placed opposite each other.

The rolling method based on this example will be explained in order.

In the above rolling equipment, the material to be rolled 1 is first held between the manipulators 5 and moved in the direction of the horizontal rolls 2 using a roller table (not shown). An appropriate gap is set in the width direction between the manipulator 5 and the rolled material 1 until the position ff where the rolled material 1 starts to be bitten by the horizontal rolling rolls, and the vertical rolls 3, 3 and 4.4 are also It is evacuated to a position where the progress of the rolled material 1 is not obstructed. Next, the roll load meter of the horizontal rolling roll detects that the rolled material 1 has reached the position ff on the horizontal rolling roll and is bitten, and the locking mechanism 10 of the manizolator is actuated by the biting signal. death,
The manipulator is firmly fixed. Subsequently, with the same signal, the horizontal direction (plate width direction) reduction adjustment device 12 of the vertical rolls 3, 3, the horizontal direction (plate width direction) reduction adjustment device 15 of the vertical rolls 4.4, and the vertical direction (plate thickness direction) ) The rolling reduction adjustment device 16 is activated, rolling is applied to the end faces and edge portions at both ends of the plate width of the material to be rolled 1, and rolling in the width direction is started, and thereafter rolling is continued by the pulling force of the horizontal rolling rolls 2. . Here, the plate width WI of the material to be rolled 1 before rolling in this pass
is detected by a sheet width meter (photovoltaic width meter, infrared width meter, etc.), and furthermore, the rolling temperature, horizontal rolling roll entry side, exit 11111
Horizontal direction (width direction) of the vertical roll using the plate thickness relational expression
The rolling down adjustment device 12.15 and the vertical force direction (thickness direction) rolling down adjustment device 16 are operated to adjust the opening degree of the vertical roll in the horizontal direction (width direction) and vertical direction (thickness direction) to control the sheet width. can be done.

In the case of this rolling method, the tip end of the material to be rolled 1 in the rolling direction is determined from the center-to-center distance between the axis of the vertical roll 3 and the axis of the horizontal rolling roll 2 mounted on the manipulator 5. Width reduction is not performed for a length portion corresponding to the distance Lf subtracted from the contact projection length tdt' of the horizontal rolling roll 2. That is, it is a vertical roll non-driving system, and there is a widthwise unrolled belt produced by utilizing the pulling force of the horizontal rolling rolls 2,
Normal thick plate rolling is reciprocating rolling, so in the next cut, a widthwise reduction is applied at the rear end of the plate at the vertical roll roller 4'.

In this rolling method, on the entrance side of each pass of reciprocating rolling, the retraction chip of the horizontal rolling roll is used to apply widthwise reduction by vertical rolls, so both longitudinal ends of the rolled strip are alternately formed into widthwise unrolled bands. However, a reduction in the width direction is necessarily applied every second pass.

In order to eliminate the difference in the width of the rolled material plate that occurs in the widthwise unrolled band mentioned above, the widthwise unrolled band of the rolled material that occurs during rolling in the next pass (at the trailing end of the pass and the leading edge of the next pass). Predict the length Lb and full width of the plate (which will be (Automatic thickness control-
A, G, C) ensure the accuracy of the board width.

In this way, the material to be rolled 1 is rolled in the direction of the arrow F, and then rolled in the opposite direction to the direction of the arrow F using exactly the same rolling method used for rolling in the direction of the arrow F, and is successively reciprocated until the final roll is reached. is repeated to complete the rolling.

Next, a second embodiment of the present invention will be explained using the drawings.

In the plan view of FIG. 3 and the side view of FIG. 4, 1 is a material to be rolled, and 2 is a horizontal rolling roll of a conventional 4-high reversible plate rolling mill. direction (arrow F) forward or backward only or both vertical rolls 3, 3 and 4, 4, 3' and 4/;
4/ are provided opposite to each other in the direction perpendicular to the rolling direction. Both of these vertical rolls are driven in the non-driving method described above, but when the material to be rolled 1 is always rolled by the vertical rolls on the entrance side of the horizontal rolling rolls 2, the vertical rolls 4, 4 are driven. or 4/
, 4/ can also be driven.

Each pair of vertical rolls 4, 4 or 4/, , i/ has a thread-wound shape (T-shape) with a larger diameter at the upper end, and moves up and down in response to changes in the thickness of the material to be rolled 1. Possibly, each pair of vertical rolls 3, 3 or 3', 3' has a pincushion shape (upper mold) with a diameter of a dog at the lower end.

This embodiment shows an example in which two pairs of yarn rolls are installed only in front or behind the horizontal rolling roll 2 in the rolling direction, or both. It is also possible to alternately install vertical rolls having different shapes.

In the case where these vertical rolls are installed both at the front and rear of the plate rolling mill, the manipulators installed at the front and rear of the horizontal rolling roll 2 as shown in FIG. Vertical rolls 3.3 and 4,4 and J at 5,5',
41.41 will be placed.

That is, 6. σ is a rank frame that drives the manipulator, 7 and 1 are spindle shafts that drive the rack frame, and 8 and 1 are reduction gears, and 9. q is electric motor, 10,1σ
is a locking mechanism attached to the rack frame to secure the manipulator in place. The following rolls are all driven, 11 and 11' are the bearing chocks that hold the vertical rolls 3 and 3, and 3' and 3', and 12 and 12' are the manipulator 5 and the next frame. Horizontal direction (plate width direction) reduction device using fluid pressure installed in the gap between vertical roll bearing chocks 1x and 1r,
13, 13' are vertical rolls 3. 14. 14' is an outer frame box containing bearing chocks 13, 13' that hold vertical rolls, 15,
1 is the manipulator 5, q frame and outer box 14
, 14' is a fluid pressure horizontal direction (plate width direction) reduction adjustment device installed in the gap between 16° 1σ and 13° 13' bearing chocks that hold the vertical rolls.
The outer frame box 14 is used to move vertically (in the thickness direction) within the box.
, 14' mounted on the hydraulic or electrically operated vertical (
The plate thickness direction) reduction adjustment device 17.1'l' is a driving electric motor that provides rotation of the vertical roll at the same circumferential speed as that of the horizontal rolling roll of the thick plate rolling mill.

That is, the vertical rolls 3, 4, 3', and 1 are adjusted to protrude positions from the end guide surface of the rolled material 1 of the manipulator according to the amount of width reduction, and the vertical rolls 4, 4' Adjustment can be made in the vertical direction (thickness direction) in response to changes in the thickness of the material 1, and the diameter of the upper and lower ends of the pincushion shape (T-type/upper die) is large, making it possible to adjust the thickness of the material to be rolled. They are arranged to face each other so that the width end face and the combined edge (part of the corner) can be forcibly restrained and rolled.

The rolling method based on this example will be explained in order.

In the above-mentioned rolling equipment, first, the rolled roll 1 is held between the manipulators 5 and moved in the direction of the horizontal rolling rolls 2 (in the direction of arrow F) using a roller table (not shown). An appropriate gap is set in the width direction between the manipulator 5 and the rolled plate 1 until just before the vertical rolls 4, 4 bite the material 1 to be rolled, and the manipulator is firmly fixed by a locking mechanism 10.

Subsequently, the material to be rolled 1 is moved in the direction of the horizontal rolling rolls 2, and after the vertical rolls 4, 4 and 3, 3 roll both end faces and edges of the material to be rolled, the horizontal rolling rolls 2 roll the material. After reducing the thickness and rolling in the direction of arrow F, the vertical rolls 4', 4', and 3' are operated again in the direction opposite to the direction of arrow F to perform rolling on both end faces and edges of the plate width. .

In this rolling method, rolling of both ends and edges of the steel plate in each rolling pass is carried out only on the entry side of the horizontal rolling rolls, and the vertical rolls on the exit side are left slightly wider than the width of the steel plate to be rolled. On the other hand, it is possible to arbitrarily choose to perform rolling in the width direction of the strip using only the vertical rolls on the exit side, so it is possible to adjust and control the strip width of the rolled vJ1 by appropriately combining these for each rolling process. The reciprocating rolling is repeated until the final stage. Whichever method is used, before applying width direction reduction to the rolled material 1 using vertical rolls, measure the strip width WI of the rolled material 1 using a strip width meter (infrared width meter, photovoltaic width meter, etc.) in advance. The vertical roll horizontal (width direction) rolling adjustment device 12.15 and vertical roll (thickness direction) rolling adjustment are performed using the rolling temperature and plate thickness relational expressions on the inlet and outlet sides of the horizontal rolling rolls. By operating the device 16, the horizontal and vertical opening degrees of the vertical rolls can be adjusted to control the board width.

Two specific embodiments of the thick plate rolling method according to the present invention have been described, but with respect to the rolling pressure generated by rolling the width end face and edge of the steel plate using a plurality of vertical rolls attached to a manizolator, Maniplay 1-5. cfI) If all the components such as the teeth of the rack and binion have sufficient strength, the locking mechanism 10.1σ for firmly fixing the manizolator can be omitted, and the rolled material 1 of the manizolator can be omitted. By appropriately selecting and fixing the position of the vertical roll protruding in the width reduction direction on the end guide surface, the vertical roll horizontal direction (plate width direction) reduction adjustment devices 12.12 and 15.15' can also be omitted.

The common features in the two embodiments described above are shown in FIG.
This will be explained in detail using FIGS. 8 and 9. FIG. 7 is a diagram showing the positional relationship between the rolled material 1 and related equipment before the rolling process is started by the vertical rolls 3 and 4, and FIG. 7(a) shows the rolling direction (arrow F). FIG. 2 is a front view seen from the top, in which holes surrounding the ends of the vertical rolls 3 and 4 of the same manipulator are formed. FIG. 7 is a top view.

With respect to the rolled material 1 (indicated by a dashed line) moving in the rolling direction on the roller table 18, the vertical rolls 3 and 4 are in the retracted position as shown in the figure, in the vertical (vertical) direction of the rolled material. This shows that when the curve υ is large, the pinch roller 19 can control the warping of the rolled material.

FIG. 8 is an overhead view of the rolled material 1 being rolled by the vertical rolls 3 and 4, viewed diagonally from above in the rolling direction.
The vertical rolls 3 and 4 are moved from the state shown in FIG. 7 in the width direction of the sheet (indicated by Hs3.ns4) by the horizontal direction (width direction) reduction adjustment device or the opening adjustment mechanism of the manipulator.
While applying a reduction in the width direction of #1 to be rolled, the vertical roll 4
is also moved by the vertical direction (indicated by HV4) adjustment device to a position to obtain a condition in which a constraint shearing reduction is applied to the thickness of the upper and lower surfaces of the end of the rolled plate in accordance with the plate thickness T1 of the rolled plate 1. Indicates that That is, two vertical rolls 4 and 3 (2
2) A concave caliber with an appropriate shape according to the plate g (T+) of the material to be rolled 1 is formed by one set, and the end face and edge of the plate width of the rolled material 1 are rolled at each of the rolling nozzles. It can be performed.

Similarly, FIG. 9 is a diagram showing the positional relationship between the material to be rolled 1 and related equipment when the material to be rolled 1 is being rolled by the vertical rolls 4 and 3, and FIG. 9(a) shows the rolling direction (arrow F ), and FIG. 9(b) is a top view. Rolled material 1
The sheet width WI before rolling is reduced in the width direction (one end reduction amount Δb, both end reduction amount Δb x 2) by vertical rolls 4°3 and vertical rolls 4' and 3' (not shown) installed opposite to each other in the direction perpendicular to the rolling direction. is added, and the width is corrected to the sheet width WO after rolling, and at the same time, the upper and lower surfaces (edges) of the sheet end are formed into the flange surface TU of the vertical roll 4, which has a pincushion shape (T-shape), and the pincushion shape (upper mold). A restraint or reduction is applied by the flange surface TO of the vertical o-ru 3. In other words, the rolled material 1 is rolled at the end of the sheet from three directions: the end surface (vertical surface) and the upper and lower surfaces (horizontal surface) of the end of the sheet, thereby obtaining a sheet material with an excellent cross-sectional shape. .

Here, the reduction amount Δb at one end of the plate width is the reduction amount Δb1 of the vertical roll 4.
and the rolling reduction amount Δb2 of the vertical rolls 3, and are distributed to appropriate values. In addition, the vertical movement of both edges in the width direction of the rolled material 1, which occurs when the thickness T1 of the rolled material 1 is small, is regulated by the flange surfaces TU and TO of the vertical rolls 4.3. Deformation of both sides is prevented, and vertical movement (total bending phenomenon) of the center of the rolled material is prevented by Tape A/Roller 1.
8 and pinch roller 19 to prevent deformation.

Note that the present invention is not limited to the shape and configuration of our rolls as shown in Figs. A method of installing at least two pairs of thread-wound vertical rolls 20, 2σ and cylindrical vertical rolls 21, 21' facing each other on side guides, that is, the thickness of the rolled material 1 as shown in FIG. 10(b). Upper and lower rolls 20-x r 20-
The gap between the rolls 2 and 2 may be adjusted, and the portions that the vertical rolls do not contact may be rolled with the vertical rolls 21, or as shown in FIG. At least two pairs of vertical rolls, each having a pincushion shape (T type) of 4.4' and a pincushion shape (upper type) with a lower diameter of 3.3', are installed on the side guide alternately facing each other (i.e. vertical rolls The object of the present invention can also be achieved by applying the method (3 and 4. 3' and 4' are opposed to each other with the material to be rolled interposed between them).

As described above, as a method for processing thick plates in the width direction, a combination of vertical rolls having a pincushion shape (T-type and upper die) is used, and the changes in the thickness of the material to be rolled are matched at each base of rolling. By restraining the end face of the plate, applying pressure reduction, forging, and correction of the plate width, we can (1) control bulging and dog bean shapes caused by width reduction, and furthermore prevent the end face from curling up, improving the edge of the end face of thick plate products; Squareization, (11) Control board width variation and camper, (1i)
(IV) Prevents packing and buckling of thin and wide plate materials; (IV) Prevents surface flaws and internal defects (wood deterioration) near the edge of the plate; improves the width accuracy of thick plate products; It is possible to obtain a board width end face with an accurate shape and no defects (surface and internal quality), and improve yield by reducing cutting loss at the defective part of the finished product.
As a result, the cutting step can be omitted.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of the relationship between the plate thickness before tentering rolling and the shape of the finished product; FIGS. 3 and 4 are plan views and side views for explaining the rolling method of the present invention; FIG. 5 is a plan view showing the main parts of an apparatus for implementing the present invention using a manipulator equipped with non-driving vertical rolls, and FIG. 6 is a plan view showing the main parts of an apparatus for implementing the present invention using a manipulator equipped with side-moving vertical rolls. FIGS. 7, 8, and 9 are plan views showing the main parts of the device; FIGS. It is a figure showing an example of a vertical roll. In the figure 1...Rolled material, 2...Horizontal rolling roll, 3.3
'. 4.4', 20.20', 21.21'... Vertical roll, 5゜5'... Manipulator, 6, 6'... Rack frame, 7.7'... Spindle axis ,8,8
'...Reducer, 9,9'...Electric: '01lo, 1
0'...Manutar fixing lock 49 +tJ, 1
1, 11'...Bearing chock for vertical roll holding, 12
, 12'... Vertical roll horizontal reduction adjustment device, 1
3.13'...Bearing chock for vertical roll holding, 14
, 14'... Outer frame box with a built-in bearing chock for holding vertical rolls, 15, 15'... Horizontal roll adjustment device for vertical rolls, 16.16'... Vertical roll adjustment device for vertical rolls. , 17.17'...For vertical roll drive''￥M,
Motivation,】8...Table roller, 19...tnf roller, WA, WI...Steel plate width, WO...Steel plate width after rolling, F...Rolling direction, tdf, tdb
...Contact projected length during rolling between the horizontal roll and the rolled material, L
...Distance between horizontal roll and vertical roll axis m, PL...
・Pass line, TI...Nil & thickness, H83
, H84, HV4... vertical roll movement direction, To,
TU...flange surface of vertical roll, Δb, Δb1°Δb
2... Amount of one-end plate width reduction. Patent Applicant: Nippon Steel Corporation Fan 1 Figure 2: 3 closed, 4th circle ′, f Figure) 1 Fan: 7 Figure 10 closed

Claims (5)

[Claims] (1) At least two pairs of vertical rolls are provided facing each other on a manipulator placed close to a plate rolling mill, and the vertical rolls are positioned in the thickness direction (it adjusted to make the same A combination of vertical rolls on the manipulator side forms a groove shape that surrounds the end portion of the material to be rolled in accordance with the thickness of the material to be rolled in the rolling direction, and these vertical rolls perform rolling in the width direction during rolling by the thick plate rolling machine. A method for rolling a thick plate in the width direction, which further comprises correcting the plate width. (2) A method for rolling a thick plate in the width direction according to claim 1, characterized in that at least two pairs of non-driven vertical rolls are arranged on both the manipulator before and after the plate rolling machine. . (3) The method for rolling a thick plate in the width direction according to claim 1, characterized in that at least two pairs of driven vertical rolls are arranged on one or both of the manipulators before and after the plate rolling mill. . (4) It is characterized in that a pincushion-shaped (T-shaped) vertical roll with a large diameter at the upper edge and a pincushion-shaped (upper type) vertical roll with a large diameter at the lower edge are arranged in the same manipulator. A method for rolling a thick plate in the width direction according to claim 1. (5) Non-driven vertical rolls are arranged opposite to both the manipulators placed before and after the thick plate rolling mill, and horizontal pressure rolls are applied at the entrance side of each rolling pass in the thick plate rolling mill. Applying a widthwise reduction to the material to be rolled by the vertical roll using a pulling force, and applying no reduction in the width direction from the manipulator vertical roll axis to the horizontal rolling roll axis at this width reduction part and the rolling direction tip of the material to be rolled. When rolling is applied in the width direction with a vertical roll at the inlet side of each rolling pass to eliminate the difference in width between the parts, the length and width of the plate corresponding to the unrolled part in the width direction in the next pass are predicted, Based on this, a method for rolling a thick plate in the width direction is characterized in that the opening degree of the vertical rolls and the opening degree of the horizontal rolls are changed during rolling.