JP3291219B2 - Rolling method, rolling mill, and rolling equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling mill and a rolling method provided with a pair of upper and lower work rolls and at least a pair of rolls respectively supporting the work rolls. The present invention relates to a rolling method, a rolling mill, and a rolling facility for performing rolling such that a coating adheres and a coating is formed on the work roll surface.

[0002]

2. Description of the Related Art For example, when an aluminum material is hot-rolled, a part of the rolled material (abrasion powder) is coated on the surface of a work roll by rolling. This is because the rolled material is peeled off due to friction between the work roll and the rolled material surface with the progress of rolling, and wear powder is easily generated, and the wear powder adheres to the rolled material and the work roll surface. . If the amount of adhesion to the work roll surface becomes excessive, a part of the coating will fall off and adhere to the rolled material surface, or the work roll surface will be in an uneven state and the uneven shape will be on the rolled material surface The printed material causes adverse effects such as generating surface defects and further significantly deteriorating the surface gloss of the rolled material.

[0003] In carrying out such rolling, conventionally, in order to control and adjust the surface quality such as the surface gloss of the rolled material, an appropriate roll coolant oil is mainly selected, or at least a work roll side oil is selected. Grinding was performed by a brush device (brush roll) installed in the factory.

On the other hand, in recent hot rolling, there is a demand for a rolling mill for largely changing or controlling the shape of the sheet crown or the sheet longitudinal direction, which is the sheet thickness distribution in the sheet width direction. In order to perform such sheet crown control during cold rolling, a work roll bender-equipped rolling mill, a six-high rolling mill, a work roll shift type (including a machine having a roll with a curve) rolling mill, and a surface of a reinforcing roll A rolling mill using a VC roll or a taper piston roll for changing and controlling the profile is used. Even in a rolling mill aiming to control these strip crowns, the control and adjustment of the surface quality of the rolled material is basically based on the adjustment of the coating amount using the above-mentioned brush roll.

[0005] Further, although this does not correspond to rolling in which a part of the rolled material adheres to the work rolls and is coated,
As a conventional technique relating to the adjustment of the surface gloss of a rolled material, as described in JP-A-5-253601 and JP-A-5-123704, the axis of the work roll is set in a plane parallel to the plane containing the rolled material. There is one that crosses the upper and lower sides in opposite directions to improve the surface gloss of a rolled material such as stainless steel by utilizing the frictional force generated at that time.

[0006]

The brush roll is intended to make the coating amount on the surface of the work roll uniform and appropriate by grinding, but the ability to adjust the surface gloss of the rolled material is not sufficient. In addition, there is a limit to the uniformizing ability. In other words, the coating amount changes due to the abrasion and wear of the brush roll, the maintenance is also difficult, and it has been difficult to maintain a constant coating amount for a long time.

[0007] Further, in rolling mills such as a rolling mill with a work roll bender, a six-high rolling mill, a work roll shift type rolling mill, a VC roll, a taper piston roll, and the like aiming to perform a sheet crown control, a brush roll is used. It was basically to control and adjust the surface quality of the rolled material,
Adjustment of the surface quality, especially adjustment of the surface gloss, by other means has not been performed. That is, large control of the sheet crown and adjustment of the surface quality of the rolled material, particularly the surface gloss, have not been compatible.

[0008] The prior art described in JP-A-5-253601 and JP-A-5-123704 is advantageous for improving the surface gloss of rolled materials such as stainless steel.
When applied to the rolling of aluminum materials, etc., in which a part of the rolled material is inevitably coated on the work roll surface by rolling, the coating amount on the work roll surface progresses excessively with the progress of rolling. In addition, a part of the coating from the roll surface falls off, and transfer of the roll surface to the rolled material having an uneven shape is more likely to occur, and the surface gloss of the rolled material is rather deteriorated.

A first object of the present invention is to uniformly control the surface quality of a rolled material, such as surface gloss, when performing rolling such that a part of the rolled material adheres to a work roll to form a coating. It is to provide a rolling method, a rolling mill, and a rolling equipment that can be used.

[0010] A second object of the present invention is to uniformly control the surface quality such as surface gloss when performing rolling such that a part of the rolled material adheres to a work roll to form a coating. An object of the present invention is to provide a rolling method, a rolling mill, and rolling equipment capable of controlling the shape of a crown and a plate in the longitudinal direction.

[0011]

In order to achieve the first object, according to the present invention, a pair of upper and lower work rolls and at least a pair of rolls respectively supporting the work rolls are used, and the work rolls are provided. In a rolling method for performing rolling in which a part of a rolled material adheres to a surface to form a coating, excessive coating adhered to the surface of the work roll
The axis of the work roll and the axis of the roll supporting the work roll are disposed so as to be able to intersect with each other in a plane parallel to the plane including the rolled material so as to remove the coating.
The intersection angle between the axis of the work roll and the axis of the roll supporting the work roll is set according to the rolling conditions and the type of rolled material so that the desired amount is obtained, and A rolling method characterized by controlling the coating amount of a rolled material is provided.

As described above, when hot rolling an aluminum material or the like, the rolled material is peeled off due to friction between the work rolls and the surface of the rolled material as the rolling progresses, and the generated wear powder is removed from the rolled material. And adhere to the work roll surface. Thereby, a part of the rolled material is coated on the work roll surface. This phenomenon occurs, for example, even if the axes of the pair of upper and lower work rolls are arranged at right angles to the direction of the rolling pass, or even if they intersect in opposite directions in a plane parallel to the plane containing the rolled material ( That is, it may occur even if the axes of the pair of upper and lower work rolls are parallel. If the rolling is continued as it is, the coating on the work roll surface grows and becomes excessively thick, and a part of the coating falls off and adheres to the rolled material surface, or the work roll surface shape becomes uneven. Has adverse effects such as being printed on the surface of the rolled material to cause surface defects and significantly deteriorating the surface gloss of the rolled material.

On the other hand, according to the present invention, since the axis of the work roll and the axis of the roll supporting the work roll are disposed so as to be able to intersect in a plane parallel to the plane including the rolled material, the work roll and the roll are supported. Friction occurs between the roll and the roll that supports it, and shear deformation and slippage occur. As a result, the excessive coating adhered to the surface of the work roll is always removed. In addition, by setting the intersection angle between the axis of the work roll and the axis of the roll supporting the work roll according to the rolling conditions and the type of the rolled material, a constant coating thickness according to the intersection angle is set. And the amount of coating can be controlled.
Therefore, it is possible to uniformly control the surface quality of the rolled material, particularly the surface gloss.

Here, if the crossing angle of the roll is set to a small value in the vicinity of 0 degrees including 0 degrees, it is possible to secure a rolled material having a uniform surface quality equivalent to the conventional one. This has been clarified by the inventors' verification.

In the above, the axes of the pair of work rolls are arranged so as to be able to intersect in a direction parallel to the plane including the rolled material in directions opposite to each other in the upper and lower directions, and the axis of the pair of rolls supporting the work rolls. The roll is disposed at right angles to the rolling pass direction to perform rolling, or the axes of a pair of work rolls are disposed at right angles to the roll pass direction, and the rolled material supporting the work rolls is rolled at the center of the pair of rolls. It is preferable to arrange and roll so as to be able to intersect in the directions opposite to each other up and down in a plane parallel to the plane including the sheet.

When rolling is performed with the axes of a pair of upper and lower work rolls crossing each other in directions opposite to each other in a plane parallel to the plane including the rolled material, shear deformation or slippage occurs between the rolled material surface and the work rolls. Is generated, and the amount of coating adhered to the work roll surface increases. In addition, the greater the intersection angle, the faster the growth rate of the coating and the greater the volume. However, in this case, since the axis of the roll supporting the work roll is perpendicular to the rolling pass direction, increasing the crossing angle of the upper and lower work rolls necessarily inevitably supports the axis of the work roll and the same. The purpose of this is to increase the angle of intersection with the axis of the roll, thereby increasing the degree of coating removal. Therefore, by controlling the coating amount on the work roll surface, it becomes possible to uniformly control the surface quality of the rolled material such as the surface gloss.

On the other hand, the axes of a pair of work rolls are arranged at right angles to the direction of the rolling pass, and the axes of the pair of rolls supporting the work rolls are vertically aligned in a plane parallel to the plane containing the rolled material. Even if they are arranged to be able to intersect in the opposite direction, there is a certain degree of difference, but it is still the same that a part of the rolled material is coated on the work roll surface, and the intersection of a pair of rolls supporting the work roll Shear deformation and slippage occur between the work roll and a pair of rolls whose axes intersect according to the angle, which can be used to control the amount of coating on the work roll surface and roll the surface gloss etc. It is possible to uniformly control the surface quality of the material.

The rolling mill in which the axes of the work rolls are crossed,
It has the ability to change the gap between the upper and lower work rolls, that is, the ability to control the crown of the sheet and the shape control ability in the longitudinal direction of the sheet. It may be used for shape control in the direction. For example, when the rolling load is large, since the sheet crown generally tends to be convex, it is desirable to set the cross angle of the work rolls large and make the roll gap between the upper and lower work rolls concave. Have been. When a rolling mill in which such work rolls are crossed is applied to rolling of a rolled material in which a part of the rolled material is coated on the work rolls, when the crossing angle of the work rolls is increased, the rolled material and the work rolls are increased. The slippage between them tends to increase, and the growth rate of the coating adhering to the work roll tends to increase. However, the slip between the work roll and the roll supporting the work roll also increases, and as a result, the growth of the coating amount of the work roll is suppressed, and the coating amount can be adjusted and maintained in a uniform state. Therefore, in other words, by optimally adjusting the crossing angle of the work rolls, the surface quality such as the surface gloss of the rolled material is controlled and maintained in a good condition, and at the same time, the plate crown is significantly controlled and the plate longitudinal direction is adjusted in harmony therewith. Can be controlled. Conversely, when the rolling load is small, the tendency generally reverses to the above, but from the same discussion, the coating amount of the work roll can also be controlled and maintained in a uniform state. From the above, the first and second objects of the present invention can be achieved.

Further, even when the axes of the pair of upper and lower work rolls are arranged at right angles to the direction of the rolling pass and the work rolls are vertically parallel, as in the present invention, the pair of upper and lower work rolls support the work rolls. If the axes intersect with each other, it is possible to provide the sheet crown control ability and the shape control ability in the sheet longitudinal direction to a lesser extent. Therefore, by optimally adjusting the crossing angle of the work rolls in the same manner as described above, the surface quality such as the surface gloss of the rolled material can be controlled and maintained in a good condition, and at the same time, the crown control and the plate longitudinal direction can be performed while harmonizing with it. Shape control can also be performed.

By the way, if lubrication between a work roll and a roll supporting the work roll is simply performed only with water as in the conventional case,
A large frictional force generated between the two rolls generates a large thrust force in the roll axis direction and causes mill vibration, etc.By reducing the above frictional force by supplying appropriate lubricating oil between the two rolls It is possible to reduce the thrust force and eliminate the mill vibration. This is disclosed in
No.-50110. On the other hand, the coolant oil for cooling the rolls used for hot rolling of the aluminum material has a coefficient of friction equivalent to the lubricating oil between the rolls used in JP-A-5-50110 as described later. Therefore, the lubricating oil between the work roll and the roll supporting the work roll may be equivalent to the coolant oil for cooling the roll.

In view of the above, according to the present invention, between the pair of work rolls and the pair of rolls supporting the work rolls, coolant oil for cooling the work rolls is used as oil for both roll cooling and inter-roll lubrication. It is preferable to supply an oil that can be mixed with the roll coolant oil as the inter-roll lubricating oil. As described above, the coolant between the work rolls and the rolls supporting the work rolls uses coolant oil for cooling the work rolls, or uses oil that does not cause a problem even if roll coolant oil is mixed as the lubricant between the rolls. By doing so, good roll cooling and inter-roll lubrication can be achieved, waste liquid treatment after use becomes easy, and the amount of treatment can be reduced. If necessary, other lubricating oils or additives may be added as long as the conditions are within the above range.

Here, the work rolls and the rolls supporting the work rolls are described as the intersecting rolls, and the supply of the lubricating oil between the work rolls has been described. Even if there are lubricating oils, it is fundamental to supply lubricating oil between them.

Further, the coating on the surface of the work roll is ground using a brush device, the intersection angle between the axis of the work roll and the axis of the roll supporting the work roll is changed, and the grinding by the brush device is used in combination. It is preferable to control the quality of the surface of the rolled material. In this way, in addition to controlling the coating amount on the work roll surface by friction between the work roll and the roll supporting the work roll, by grinding with a brush device, finer adjustment of the coating amount on the work roll surface becomes possible, The surface quality of finer rolled material can be adjusted.

Further, according to the present invention, in a rolling method in which rolling in which a coating of a rolled material is formed on a work roll is performed by a tandem rolling facility including a plurality of rolling mills, at least the rolling of the final stand is performed as described above. A rolling method characterized by being performed by the rolling method as described above is provided.

Further, according to the present invention, in a rolling method for performing rolling in which a coating of a rolled material is formed on a work roll using a reverse rolling facility, at least rolling of the final pass is performed by the rolling method as described above. There is provided a rolling method characterized in that it is performed.

If the crossing angle of the work roll or the roll supporting the work roll is set to a small value in the vicinity of 0 ° including 0 °, it is possible to secure the same rolled material surface quality as before. As described above, in the case of the tandem rolling equipment as described above, at least at the final stand, and in the case of the reverse rolling equipment, at the final pass, the crossing angles of the work rolls are close to 0 degrees including 0 degrees. By setting a small value, or by setting the intersection angle of a pair of rolls supporting the work roll to a small value near 0 ° including 0 °, the surface quality of the rolled material equivalent to the conventional one can be obtained. It becomes possible to secure. As a result, it is possible to meet the need to secure a rolled material having the same surface quality as the conventional one.

Further, when the crossing angle of the roll is set to a small value in the vicinity of 0 ° including 0 °, the capability of controlling the crown of the sheet and controlling the shape in the longitudinal direction of the sheet may be reduced. By controlling the shape of the crown and the plate in the longitudinal direction by controlling the intersection angle of the work rolls or controlling the intersection angle of the rolls supporting the work rolls as main control means, The ability of control and shape control in the plate longitudinal direction can be maintained.

According to the present invention, in order to achieve the first object, a pair of upper and lower work rolls and at least a pair of rolls respectively supporting the work rolls are provided, and the work rolls are provided with rolled material. in rolling mill is rolling partially coating adheres is formed, the work
Remove excessive coating on the roll surface
In this manner, the axis of the work roll and the axis of the roll supporting the work roll are disposed so as to intersect with each other in a plane parallel to the plane including the rolled material, and the thickness of the coating is a desired amount.
Input means for inputting information on the rolling conditions and the type of the rolled material so that the intersection angle between the axis of the work roll and the axis of the roll supporting the work roll is set according to the input information. And a crossing angle setting means.

In the above-mentioned rolling mill, preferably,
The axes of the pair of work rolls are disposed so as to be able to intersect in the directions opposite to each other in a plane parallel to the plane containing the rolled material, and the axes of the pair of rolls supporting the work rolls are perpendicular to the rolling pass direction. Will be arranged.

On the other hand, the axes of the pair of work rolls are arranged at right angles to the rolling pass direction, and the axes of the pair of rolls supporting the work rolls are vertically moved in a plane parallel to the plane including the rolled material. They may be arranged so that they can cross in opposite directions.

Further, in the present invention, a pair of rolls supporting the work rolls is a reinforcement roll, and the pair of work rolls and the pair of reinforcement rolls constitute a four-high rolling mill or support the work rolls. A pair of rolls is used as an intermediate roll, and the pair of intermediate rolls is further supported by a pair of reinforcing rolls. The pair of work rolls, the pair of intermediate rolls, and the pair of reinforcing rolls constitute a six-high rolling mill. You may.

In the above, preferably, a coolant oil for cooling the work rolls is supplied between the pair of work rolls and the pair of rolls supporting the work rolls as an oil which also serves as roll cooling and inter-roll lubrication. Oil supply means or oil supply means for supplying oil that can be mixed with roll coolant oil as inter-roll lubricating oil is provided.

The work roll of the present invention preferably further comprises a brush device for adjusting the coating amount on the work roll surface.

Further, according to the present invention, at least one rolling mill having a plurality of stands for performing tandem rolling and performing rolling in which a coating of a rolled material is formed on work rolls of the rolling mill, at least the rolling of the final stand is performed. A rolling facility is provided, wherein the rolling mill is a rolling mill as described above.

Further, according to the present invention, at least a rolling mill for performing at least the final pass rolling is provided in a rolling facility which is provided with a rolling mill for performing reverse rolling and in which a work roll of the rolling mill is coated with a coating of a rolled material. A rolling facility is provided, wherein the rolling mill is a rolling mill having a function as described above.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a view showing a rolling mill according to the present embodiment, and shows a rolling mill (a working roll alone cross rolling mill) in which the axes of work rolls are vertically crossed in directions opposite to each other in a plane parallel to a plane including a rolled material. The configuration is shown. In FIG. 1 (a), a work roll single cross rolling mill includes a pair of upper and lower work rolls 1a, 1b and the work rolls 1a, 1b.
b and a pair of upper and lower reinforcing rolls 2a and 2b for supporting the supporting rolls b. Work roll chock 7a, 7b is provided at each end of work roll 1a, 1b.
1b is rotatably supported. Similarly, reinforcing roll 2
Reinforcement roll chocks 8a, 8b are provided at the ends of a, 2b, and rotatably support the reinforcement rolls 2a, 2b. The work roll chocks 7a, 7b and the reinforcing roll chocks 8a, 8b are respectively disposed facing the window surfaces 10 of a pair of stands 9 which are vertically spaced apart from each other in the roll axis direction of the rolling mill. The rolling material 4 is rolled by applying a rolling load to each roll from a pressing means (not shown) provided on the upper or lower part of the stand 9.

Hydraulic jacks 12a and 12b are provided on the project block 11 of the stand 9 facing both side surfaces of the work roll chock 7a and 7b, respectively. The hydraulic jacks 12a and 12b are used to control the axes of the upper and lower work rolls 1a and 1b. In a plane parallel to the plane including the rolled material (hereinafter referred to as a horizontal plane), the centers intersect with each other in the upper and lower directions, and the axes of the work rolls 1a and 1b are aligned with the axis of the reinforcing rolls 2a and 2b. It is possible to tilt with respect to. The reinforcing rolls 2a and 2b are mounted such that their axes are perpendicular to the rolling pass direction.

FIG. 2 is a view showing a mechanism for setting the crossing angle of the work rolls 1a and 1b, and is a diagram showing the hydraulic jacks 12a and 1b.
It is a figure showing a hydraulic system for driving 2b.
However, FIG. 2 shows only the hydraulic jack 12a, that is, the upper roll. The input section 16a is used to input the type of the rolled material 4, the desired strip crown, and rolling conditions such as the shape and surface gloss of the rolled material 4. The input of the rolling conditions to the input unit 16a is performed by, for example, an operator. Then, the work roll cross angle controller 16 calculates the intersection angle (cross angle) of the work rolls 1a and 1b based on the rolling conditions, and a signal based on the calculation result is sent to the switching valve 13. Pressure oil is supplied to one hydraulic jack 12 a (left side in the figure) via a switching valve 13. The displacement of the hydraulic ram 18a of the hydraulic jack 12a is determined by the displacement of the rod 14 attached to the hydraulic ram 18a.
The detection signal is fed back to the work roll cross angle controller 16. In the work roll cross angle controller 16, the work rolls 1a,
The switching valve 13 is adjusted so that the intersection angle of 1b becomes the set predetermined angle. Thereby, the work rolls 1a, 1
The intersection angle of b is set to a predetermined angle according to the rolling conditions. Pressure oil is supplied to the other (right side in the figure) hydraulic jack 12a via a pressure reducing valve 17, and presses the work roll chock 7a with a necessary pressing force. In the above description, the hydraulic jack 12a, the switching valve 13, the rod 14, the displacement sensor 15, the work roll cross angle controller 1
6, the pressure reducing valve 17, and the hydraulic ram 18a constitute an intersection angle setting means.

As shown in FIGS. 1A and 2,
Supply headers 3a and 3b are provided along the axial direction of the rolls, and work rolls 1a and 1b and reinforcing rolls 2 are provided.
Coolant oil for cooling the work rolls or oil of the same type is supplied between the a and 2b as oils for both cooling and lubrication of the rolls. The lubricating oil may be the same as the coolant oil for cooling the work rolls, but other additives may be added as necessary or mixed with the coolant oil for cooling the work rolls. A small amount of lubricating oil may be used. Further, the arrangement position of the supply headers 3a, 3b does not need to be limited to the position shown in the figure, and as a result, it may be any position as long as it can be supplied between the work rolls 1a, 1b and the reinforcing rolls 2a, 2b. Although it is provided on both the side and the exit side, it may be provided only on the roll exit side.

Further, as shown in FIG. 1 (a), benders 6a, 6b are attached to the work rolls 1a, 1b to apply a bending force to the work rolls 1a, 1b. The benders 6a and 6b are built in the project block 11 so as to sandwich the hydraulic jacks 12a and 12b, and the force from the benders 6a and 6b is applied to the fin portions 7 protruding from the work roll chock 7a and 7b.
A, 7B acts to form a gap between the upper and lower work rolls 1a, 1b in a convex or concave shape. As shown in FIG. 1 (b), at least the work rolls 1a and 1b are provided with brush rolls 5, and the brush rolls 5 grind the surfaces of the work rolls 1a and 1b as necessary.

Next, the operation of the present embodiment configured as described above will be described. When rolling is performed with the axes of the pair of upper and lower work rolls 1a and 1b crossing each other in directions opposite to each other in a plane parallel to the plane including the rolled material 4, the surface of the rolled material 4 and the work roll 1
Between a and 1b, shear deformation and slippage occur.
FIG. 3 is a diagram for explaining this state. When the upper and lower work rolls 1a and 1b intersect each other, FIG.
As shown in (a), the existence of the contact width between the rolls causes a deviation between the original roll peripheral speed VR and the actual roll peripheral speed VS, and the difference becomes slip between the rolls. However, FIG.
The vector shown in (a) is the speed vector on the work roll 1b side at the roll contact point on the left side in the figure, and the angle between the roll peripheral speed VR and the traveling direction of the rolled material 4 at that point is θ.
And When rolling is performed in such a state, FIG.
As shown in (b), slip occurs between the rolled material 4 and the work rolls 1a and 1b. In addition, a shear stress is generated in the direction due to the slip, and abrasion powder is generated from the rolled material 4 by the slip and the shear, and is coated on the surfaces of the work rolls 1a and 1b. Even if the work rolls 1a and 1b do not intersect, abrasion powder is generated, but the intersections occur more frequently for the above reason.

As described above, considering that the coating on the work rolls 1a and 1b grows due to the abrasion powder adhered to the roll surface due to the friction between the rolled material 4 and the work rolls 1a and 1b, the upper and lower surfaces are considered. The larger the intersection angle between the work rolls 1a and 1b, the faster the growth speed of the coating and the larger the amount.

However, since the axes of the reinforcing rolls 2a and 2b are perpendicular to the rolling pass direction, the work rolls 1a and 2b
1b and the axis of the reinforcing rolls 2a, 2b
Intersects in a plane parallel to the plane including the above, and the same shear deformation and slippage as those generated between the rolled material 4 and the work rolls 1a and 1b are generated although the value differs depending on the crossing angle. As a result, it is possible to always remove an excessive coating that adheres to the surfaces of the work rolls 1a and 1b and causes deterioration of surface quality such as gloss.

Therefore, as described above, increasing the crossing angle between the upper and lower work rolls 1a, 1b necessarily means that the axes of the work rolls 1a, 1b and the reinforcing rolls 2a, 2b are increased.
The intersection angle between the axis b and the axis b is increased, so that the degree of removal of the coating is increased, and the surface quality of the rolled material 4 such as the surface gloss can be uniformly controlled. In addition, for example, by appropriately adjusting the crossing angle of the work rolls 1a and 1b, it is possible to always maintain a constant coating thickness corresponding thereto and to control the coating amount, and to control the surface gloss and the like. The surface quality of the rolled material 4 can be controlled to a favorable and constant state.

Here, the need to ensure the same surface gloss as in the prior art can be met by setting the roll crossing angle to a small value near 0 ° including 0 °.

Further, in this embodiment, the brush roll 5
By grinding the surfaces of the work rolls 1a and 1b, it becomes possible to adjust the surface quality of finer rolled material in addition to the above.

Next, lubricating oil supplied between the work rolls 1a and 1b and the reinforcing rolls 2a and 2b will be described. When the work rolls 1a and 1b intersect with the reinforcing rolls 2a and 2b, by supplying an appropriate lubricating oil as described in JP-A-5-50110 between the two rolls to reduce the frictional force, It was mentioned earlier that it is possible to reduce the force and eliminate the mill vibration. Therefore, the present inventors separately investigated a coolant oil for cooling a roll, which is generally used for hot rolling of an aluminum material or the like, and found that the coolant oil was used for the roll oil described in JP-A-5-50110. It was found to have a coefficient of friction equivalent to that of the lubricating oil. FIG. 4 is a diagram illustrating this. However, in FIG. 4, the horizontal axis represents the roll intersection angle, and the vertical axis represents the thrust coefficient caused by friction. Therefore, when hot rolling an aluminum material or the like, the work roll 1
a, 1b and the lubricating oil between the reinforcing rolls 2a, 2b,
It may be equivalent to coolant oil for cooling the work rolls 1a and 1b. Thereby, the work roll 1
a, 1b and the reinforcing rolls 2a, 2b, that is, both the reduction of the thrust force and the cooling of the work rolls 1a, 1b can be performed with the same type of oil. Can be avoided, and furthermore, the waste liquid can be easily treated and the amount of the waste liquid can be reduced.

As an example, when the lubricant of the work rolls 1a and 1b and the reinforcing rolls 2a and 2b is water, a rolling load of 2000 tons was applied because the friction coefficient was 0.3 or more. The thrust force in this case is a very large value of 600 tons, and it is difficult to put it to practical use. On the other hand, since the friction coefficient of the coolant oil for cooling the work roll during hot rolling of aluminum material is about 0.06 from FIG. 4, the thrust force when a rolling load of 2000 tons is given is about 120 tons. And can be suppressed to about 1/5.

Next, a description will be given of how the embodiment can simultaneously control the crown of the plate and the shape of the plate in the longitudinal direction. As described above, a rolling mill in which the axes of the work rolls are crossed can largely exert a sheet crown control ability and a sheet longitudinal shape control ability mainly in hot rolling of a steel material. FIG. 5 is a view showing this, in which a work roll and a reinforcing roll are crossed together (pair cross method).
In comparison with the method in which the work rolls are parallel and the reinforcing rolls cross each other (backup roll cloth method), the method in which only the work rolls cross (work roll cloth method) has a greater sheet crown control ability. ing. However, the calculation conditions are as shown in the figure.

In this embodiment, when the rolling load is large, if the cross angle between the work rolls 1a and 1b is increased so that the roll gap between the work rolls becomes concave, the gap between the rolled material 4 and the work rolls 1a and 1b is increased. And the growth rate of the coating adhering to the work rolls 1a and 1b increases. However, the slip between the work rolls 1a and 1b and the reinforcing rolls 2a and 2b that support the work rolls also increases,
As a result, the growth of the coating amount of the work rolls 1a and 1b is suppressed, and the coating amount can be adjusted and maintained in a uniform state. In other words, by optimally adjusting the intersection angle between the work rolls 1a and 1b, the surface quality such as the surface gloss of the rolled material 4 is controlled and maintained in a good condition, and at the same time, the crown control and the longitudinal direction of the plate are performed while harmonizing with the quality. Shape control can also be performed significantly.

When the rolling load is small, the tendency is generally opposite to the above, ie, the rolled material 4 and the work rolls 1a, 1a.
b and the growth rate of the coating adhering to the work rolls 1a and 1b is reduced. However, since slippage between the work rolls 1a, 1b and the reinforcing rolls 2a, 2b is also reduced, the work rolls 1a, 1b grow more easily than when the rolling load is large. The coating amount can be controlled and maintained in a uniform state.

Here, a conventional rolling mill in which a part of a rolled material is coated on a work roll will be described.
FIG. 6 is a diagram showing an example of a conventional hot rolling mill used for aluminum materials and the like. This rolling mill comprises a pair of upper and lower work rolls 51a, 51b and a reinforcing roll 5 supporting the work rolls.
The cooling of the work rolls 51a and 51b is performed by spraying them from the roll coolant supply headers 53a and 53b. Further, the thickness at which the abrasion powder of the rolled material 54 adheres to the work rolls 51a and 51b and is coated grows as the rolling progresses. Work rolls 51a,
Excessive coating on 51b adversely affects the surface quality of rolled material 54, particularly gloss. Suppress this,
In order to make the coating amount (thickness) constant and uniform, at least the work rolls 51a and 51b are provided with brush rolls 55a and 55b as shown in FIG. 6B. On the other hand, the work rolls 51a and 51b are provided with benders 56a and 56b for applying a bending force, thereby controlling the sheet crown and the shape in the sheet longitudinal direction. In FIG. 6, the vendors 56a,
Although 56b is simplified by arrows, it is actually shown in FIG.
Has the same configuration as

In such a conventional rolling mill, the amount of coating on the work rolls 51a and 51b is not sufficiently constant and uniform, and the vender 5 is also required to control the sheet crown.
Since only 6a and 56b are not enough, various types of rolling mills as described above, for example, a 6-high rolling mill, a work roll shift type rolling mill, a VC roll, a taper piston roll, and the like have been proposed and put into practical use. .

In the case of a six-high rolling mill, the sheet crown control means includes work roll bending, intermediate roll axial movement, and, if necessary, intermediate roll bending. In the machine, there are work roll bending and work roll shift. In the case of a VC roll or a tape piston roll, the roll shape of a reinforcing roll is changed by hydraulic pressure or a tape piston, and a bending means of a work roll is used.

However, in any case, adjustment of the surface gloss and the like of the rolled material 54 is still mainly performed by the brush roll 55a.

As shown in FIG. 7, a pair of upper and lower work rolls 61 is used as a rolling mill with an emphasis on sheet crown control.
a, 61b and reinforcing rolls 62a, 62b supporting the same
The upper work roll 61a and the reinforcing roll 62a and the lower work roll 61b and the reinforcing roll 6
A rolling mill (pair-cross rolling mill) in which the shafts 2b are arranged in pairs so as to intersect with each other in opposite directions has been put to practical use in the field of rolling steel materials. When such a rolling mill performs rolling as the object of the present invention, that is, rolling in which a part of the rolled material adheres to and coats the work rolls, the axes of the upper and lower work rolls 61a and 61b cross each other. Therefore, the friction between the rolls 64 increases and the generation of abrasion powder increases, so that the amount of coating on the work rolls 61a and 61b increases, as well as the work rolls 6.
Since the crossing angle between 1a, 61b and the reinforcing rolls 62a, 62b is 0 °, the friction between them is small, and it is not expected to prevent the coating amount from growing during this time. That is, in this case, the uneven coating shape is transferred to the rolled material 64, and the surface gloss of the rolled material 64 deteriorates.

For the rolling mills shown in FIGS. 6 and 7 as described above,
In the present embodiment, the work rolls 1a, 1b are arranged so that the axes of the work rolls 1a, 1b intersect with the axes of the reinforcing rolls 2a, 2b in a plane parallel to the plane including the rolled material 4.
The excessive coating on the surfaces of the work rolls 1a, 1b is constantly removed by shear deformation or slippage generated between the upper and lower work rolls 1a, 1b.
By appropriately adjusting the crossing angle between the axes of the work rolls 1a and 1b and the axis of the reinforcing rolls 2a and 2b, a constant coating thickness can be always maintained. , The coating amount can be controlled.

According to the present embodiment as described above, the axes of the work rolls 1a and 1b are crossed in a plane parallel to the plane including the rolled material 4, and the type of the rolled material 4, desired plate crown, Since the intersection angle is set according to the rolling conditions such as the shape and surface gloss of the material 4, the constant coating thickness can be always maintained, and the coating amount can be controlled. Particularly, the surface gloss can be maintained in a favorable and constant state.

Further, since oil equivalent to a coolant oil for cooling the work rolls 1a and 1b is used as an oil which also serves as roll cooling and lubrication between the work rolls 1a and 1b and the reinforcement rolls 2a and 2b, Both the lubrication between the rolls 1a and 1b and the reinforcing rolls 2a and 2b, that is, the reduction of the thrust force, and the cooling of the work rolls 1a and 1b can be easily performed with the same type of oil, and the disposal of waste liquid after use is also possible. It becomes easy and the processing amount can be reduced.

Further, since the intersection angle between the work rolls 1a and 1b is optimally adjusted, the surface quality such as the surface gloss of the rolled material 4 is controlled and maintained in a good condition, and at the same time, the crown control and the sheet crown control are greatly performed in harmony therewith. Shape control in the plate longitudinal direction can be performed.

Further, the work roll 1 is
Since the surfaces a and 1b are ground, finer surface quality of the rolled material can be adjusted.

The intersection angle between the axes of the work rolls 1a and 1b may be changed (reset) according to the surface quality of the rolled material 4 after rolling.

Next, second and third embodiments of the present invention will be described with reference to FIGS. FIG.
And FIG. 9 shows an example in which a rolling mill as shown in FIG. 1 is arranged in a finishing mill of a tandem rolling machine that performs rolling in one direction by a multi-stand rolling mill. FIGS. 1 shows an example in which a rolling mill as shown in FIG. 1 is applied to a reverse rolling facility that performs rolling by reciprocating through a mill.

First, the tandem rolling equipment will be described with reference to FIG. As shown in FIG. 8, a bar material having a thickness of about 15 to 30 mm roughly rolled by the rough rolling mill 101 is finish-rolled by the finishing tandem rolling mill row 102. For example, when performing tandem rolling of an aluminum material hot, the front stand of the finishing tandem rolling mill row 102 mainly controls the sheet crown.
02a and the rolling mill 102b of the second stand, the crossing angles of the work rolls are set large, and the rolling mill 102c of the third stand and the rolling mill 102d of the fourth stand in the rear stand mainly control the shape in the longitudinal direction of the plate. In this case, it is desirable that the angle be smaller than the intersection angle of the work rolls of the front stand. In addition, the intersection angle of the work rolls of at least the final stand of the finishing tandem rolling mill row 102, that is, the rolling mill 102d of the fourth stand, is such that the desired surface quality of the rolled material such as the surface gloss can be secured, and the good plate shape is also provided. It is better to set it so that it can be secured.

As shown in FIG. 9 (a modified example of FIG. 8), at least the work of the rolling mill 102d in the final stand is required to obtain a rolled product having the same surface quality as the conventional one. This can be realized by setting the roll intersection angle to a small value including 0 degrees. Alternatively, as at least the rolling mill 102d of the final stand, a rolling mill which does not have the function of setting the roll crossing angle as described above may be applied.

FIG. 15 shows that the crossing angle of the work roll is, for example, 0
It is a figure explaining the result of having verified that the rolled product of the same surface quality as a conventional product was obtained by measuring the number of rolling passes, in which the horizontal axis represents the number of rolling passes and the vertical axis represents the plate surface gloss (relative value). As shown in FIG.
After rolling several passes at a degree of
When rolled back to the degree, the plate surface glossiness (relative value) of the rolled material coincides with the glossiness when rolling is performed with the crossing angle set to 0 degree from the first rolling pass. When the crossing angle of the roll is set near 0 degrees in this manner, the ability to control the sheet crown and the shape in the sheet longitudinal direction may be reduced. If the main control means other than control of the roll crossing angle, for example, work roll bending, is used, the ability to control the sheet crown and to control the longitudinal shape of the sheet can be maintained.

Next, the reverse rolling equipment will be described with reference to FIG. As shown in FIG. 10, a bar material having a sheet thickness of about 15 to 30 mm roughly rolled by the rough rolling mill 111 has a thickness of about 15 to 30 mm.
Rolling is performed by a reversible rolling mill 112 having the following configuration. In this case, rolling is performed by passing the rolled material back and forth to the reversible rolling mill 112, but the crossing angle of the work rolls is set to be large from the initial pass to at least one pass before the final pass. In this case, the sheet crown control is mainly performed, and the crossing angle of the work rolls is gradually reduced as approaching the final pass, thereby mainly controlling the shape in the sheet longitudinal direction. At least in the final pass, it is preferable to set the intersection angle of the work rolls so as to secure a desired surface quality of the rolled material such as the surface gloss, and to set a good plate shape together.

FIG. 11 (FIG. 10) shows the need to obtain a rolled product having the same surface quality as the conventional product.
This can be realized by setting the crossing angle of the work roll in at least the final pass to a small value including 0 degree as shown in (Modification of the above). It can be seen from the verification result of FIG. 15 that the plate surface glossiness (relative value) of the rolled material in this case matches the glossiness when the rolling angle is set to 0 ° from the first rolling pass. The description will be made in the same manner as in the case of the rolling equipment. Further, in this case as well, if the shape control of the rolled material in the strip crown and strip longitudinal direction is performed as a main control means other than control of the roll crossing angle, for example, work roll bending, etc., the strip crown control is performed. And the ability to control the shape in the plate longitudinal direction can be maintained.

According to the present embodiment as described above, in the tandem rolling equipment or the reverse rolling equipment, the desired quality of the rolled material such as the surface gloss and the desired surface quality such as the surface gloss can be ensured in addition to appropriate control of the shape of the sheet crown and the sheet longitudinal direction. You can also. However,
The rolling equipment of the present invention is not limited to the configuration as shown in FIGS. When a bar material having a small sheet crown is to be supplied by rough rolling, a rolling mill as shown in FIG. 1 may be applied to the rough rolling mill. Further, the present invention may be applied to a rolling mill as shown in FIG. 1 for both a rough rolling mill and a finishing rolling mill.

Next, fourth, fifth, and sixth embodiments of the present invention will be described. The rolling mill shown in FIG. 12 includes a pair of upper and lower work rolls 21a and 21b,
This is a six-high rolling mill composed of intermediate rolls 22a and 22b supporting the rolls 1a and 21b and reinforcing rolls 23a and 23b supporting the intermediate rolls 22a and 22b. The axes of only the work rolls 21a and 21b are crossed. Things. The rolling mill shown in FIG. 13 includes a pair of upper and lower work rolls 31a and 31b, intermediate rolls 32a and 32b supporting the work rolls 31a and 31b, and reinforcing rolls 33a and 33b supporting the intermediate rolls 32a and 32b. 6-high rolling mill, and intermediate rolls 32a, 32b
Only the axes are crossed. In the case of the six-high rolling mill shown in FIGS. 12 and 13, the work rolls 21a and 21b or the work rolls 31a and 31b are provided with a roll bending applying means, and the intermediate rolls 22a and 22b or the intermediate rolls 32a and 32b are required. The controllability of the crown and the shape of the plate may be further expanded by allowing the plate to move in the axial direction according to the above, and flexible control can be performed.

Further, the rolling mill shown in FIG. 14 comprises a pair of upper and lower work rolls 41a and 41b, and the work rolls 41a and 41b.
This is a four-high rolling mill consisting of reinforcing rolls 42a and 42b supporting the rolls a and 41b. Unlike the case where the axes of the work rolls intersect as shown in FIG.
Only the axes are crossed. Also in this case, although it is inferior to the first embodiment, it has a sheet crown control ability and a shape control ability in the sheet longitudinal direction.

As described above, the same effects as in the first embodiment can be obtained in each of the embodiments shown in FIGS.

[0073]

According to the present invention, the surface of the work roll is attached to the work roll.
The axis of the work roll and the axis of the roll supporting the work roll are disposed so as to intersect in a plane parallel to the plane containing the rolled material so as to remove excessive coating to be applied, and the intersection angle thereof Is set according to the rolling conditions and the type of rolled material so that the thickness of the coating is a desired amount, so that excessive coating adhering to the surface of the work roll is removed, and a constant coating thickness is obtained. And the surface quality of the rolled material, particularly the surface gloss, can be controlled to a desired good state. As a result, it is possible to manufacture a rolled product having good surface quality of the rolled material such as surface gloss.

Further, since oil equivalent to a coolant oil for cooling the work roll is used as an oil which also serves as roll cooling and lubrication between the work roll, both the reduction of the thrust force and the cooling of the work roll are achieved. It can be easily carried out with the same kind of oil, and the treatment of waste liquid after use becomes easy and the amount of treatment can be reduced.

Further, since the crossing angle of the work roll or the roll supporting the work roll is optimally adjusted, the surface quality such as the surface gloss of the rolled material is controlled and maintained in a good condition, and at the same time, the plate is greatly adjusted while harmonizing with it. Crown control and shape control in the plate longitudinal direction can be performed.

Further, since the surface of the work roll is ground by the brush roll, it is possible to finely adjust the surface quality of the rolled material.

Further, in the present invention, the same effect can be obtained by applying a four-high rolling mill or a six-high rolling mill. The desired quality of the rolled material, such as the surface gloss, can be ensured together with the appropriate control.

In the case of tandem rolling equipment, at least at the final stand, and in the case of reverse rolling equipment, at the final pass, the crossing angle of the work roll is set to a small value near 0 ° including 0 °. Or by setting the crossing angle of a pair of rolls supporting the work roll to a small value near 0 ° including 0 °, to secure a rolled material having the same surface quality as the conventional one. That
Can also respond to Further, since the shape control of the strip crown and the strip longitudinal direction of the rolled material is performed as a main control means other than the control of the intersection angle of the work rolls or the control of the intersection angle of the rolls supporting the work rolls. In addition, the ability to control the crown of the sheet and the shape in the longitudinal direction of the sheet can be maintained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention,
(A) is a diagram showing a configuration of a rolling mill (a work roll alone cross-rolling machine) in which the axes of the work rolls are vertically crossed in directions opposite to each other in a plane parallel to the plane including the rolled material, and (b) is a view showing (a). )
FIG. 4 is a view showing a brush roll installed on a work roll in FIG.

FIG. 2 is a view showing a mechanism for setting an intersection angle between work rolls 1a and 1b in FIG. 1, and is a diagram showing hydraulic jacks 12a and 12b;
FIG. 2 is a view showing a hydraulic system for driving the hydraulic system.

3A and 3B are diagrams illustrating a state in which shear deformation and slippage occur when rolling is performed by crossing axes of upper and lower work rolls in a plane parallel to a plane including a rolled material, and FIG. Represents slip between rolls, and (b) represents slip generated between a work roll and a rolled material.

FIG. 4 shows a cooling oil for cooling a roll, which is generally used for hot rolling of aluminum material or the like, and Japanese Patent Application Laid-Open No. 5-501.
FIG. 11 is a diagram for comparing friction of lubricating oil between rolls described in No. 10;

FIG. 5 shows a method in which both work rolls and reinforcing rolls intersect (pair cross method), a method in which work rolls are parallel and reinforcing rolls intersect (backup roll cross method), and a method in which only work rolls intersect ( FIG. 6 is a diagram comparing sheet crown control abilities of each of the work roll cloth methods.

FIG. 6 (a) is a diagram showing an example of a conventional hot rolling mill used for an aluminum material or the like, and FIG. 6 (b) is a diagram showing a brush roll installed on a work roll in (a). .

FIG. 7 is a view showing a four-high rolling mill (pair cross rolling mill) in which upper work rolls and reinforcing rolls and lower work rolls and reinforcing rolls are paired and arranged so that their axes intersect in opposite directions. .

FIG. 8 is a view showing a second embodiment of the present invention, in which a rolling mill as shown in FIG. 1 is arranged in a finishing mill of a tandem rolling mill that performs unidirectional rolling with a multi-stand mill. FIG.

FIG. 9 is a view showing a modification of FIG. 8, in which the intersection angle of the final stand is set to 0 in order to secure the same surface gloss as the conventional one.
It is a figure showing the case where it is set to degree.

FIG. 10 is a view showing a third embodiment of the present invention,
It is a figure which shows the example which applied the rolling mill as shown in FIG. 1 to the reverse rolling equipment which performs reciprocating passing and rolling to the rolling mill of one stand.

FIG. 11 is a view showing a modification of FIG. 10, in which the crossing angle of the final pass is set to 0 for the purpose of securing the same surface gloss as in the related art.
It is a figure showing the case where it is set to degree.

FIG. 12 is a view showing a fourth embodiment of the present invention,
It is a figure which shows the 6-high rolling mill which crossed the axis of only a work roll.

FIG. 13 is a view showing a fifth embodiment of the present invention,
It is a figure which shows the 6-high rolling mill which made the axis center of only an intermediate roll cross.

FIG. 14 is a view showing a sixth embodiment of the present invention,
It is a figure which shows the four-high rolling mill which made the axis center of only a reinforcement roll cross.

FIG. 15 is a diagram illustrating the result of verification that a rolled product having a surface quality equivalent to that of the related art can be obtained by setting the intersection angle of the work roll to, for example, 0 °.

[Explanation of symbols]

1a, 1b Work roll 2a, 2b Reinforcement roll 3a, 3b Supply header 4 Rolled material 5 Brush roll 6a, 6b Bender 7a, 7b Work roll chock 8a, 8b Reinforcement roll chock 9 Stand 10 Window surface 11 Project block 12a, 12b Hydraulic jack 13 Switching Valve 14 Rod 15 Sensor 16 Work roll cross angle controller 16a Input unit 17 Pressure reducing valve 18a, 18b Hydraulic ram 21a, 21b Work roll 22a, 22b Intermediate roll 23a, 23b Reinforcement roll 31a, 31b Work roll 32a, 32b Intermediate roll 33a, 33b reinforcing rolls 41a, 41b working rolls 42a, 42b reinforcing rolls 101 rough rolling mill 102 finishing tandem rolling mill row 102a, 102b, 102c, 102d (finishing) rolling mill 11 rough rolling mill 112 reversible rolling mill

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI B21B 28/04 B21B 28/04 A 37/28 37/00 116Z 117Z (72) Inventor Kenjiro Narita 7-chome Omikamachi, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Power and Electricity Development Division (72) Inventor Yukio Hirama 2-1 Omika-cho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Power and Electricity Development Division (72) Inventor Yoshio Takakura Hitachi, Ltd. Hitachi Plant, 3-1-1, Sachimachi, Hitachi City, Ibaraki Prefecture (72) Inventor Kenji Horii 3-1-1, Sachimachi, Hitachi City, Hitachi City, Ibaraki Prefecture, Ltd. Hitachi, Ltd. Hitachi Plant (72) Inventor Shigentoshi Kondo 3-1-1, Sachimachi, Hitachi-shi, Ibaraki Pref. Hitachi, Ltd.Hitachi Plant (72) Inventor Kazuyoshi Suzuki Inazawa-shi, Aichi Pref. 1-11-1 Japan Light Metal Co., Ltd., Nagoya Plant (72) Inventor Sasa Furuta 1-11-1 Koike, Inazawa City, Aichi Prefecture Japan Light Metal Co., Ltd., Nagoya Plant (56) References JP-A-5-237512 ( JP, A) JP-A-6-15320 (JP, A) JP-A-10-29010 (JP, A) Patent 3233586 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 1/22 B21B 1/34 B21B 3/00 B21B 13/14 B21B 27/10 B21B 28/04 B21B 37/28

Claims (24)

(57) [Claims] 1. A rolling method in which a pair of upper and lower work rolls and at least a pair of rolls respectively supporting the work rolls are used, and a roll is formed in which a part of a rolled material adheres to the work rolls to form a coating. The excessive coating adhering to the surface of the work roll
And axis of the roll for supporting the work the work rolls to the axis of the roll so as to remove and arranged to be crossed in a plane parallel to the plane containing the rolled material, the thickness of the coating
The intersection angle between the axis of the work roll and the axis of the roll supporting the work roll is set in accordance with the rolling conditions and the type of the rolled material so that the desired amount is attained. A rolling amount of the rolled material is controlled. 2. The rolling method according to claim 1, wherein the axes of the pair of work rolls are disposed so as to be able to cross in a direction parallel to a plane including the rolled material in mutually opposite directions. A rolling method characterized in that rolling is performed by disposing the axes of the pair of rolls supporting the rolls at right angles to a rolling pass direction. 3. The rolling method according to claim 2, wherein the control of the amount of coating on the surface of the work roll and the control of the crossing angle of the axis of the work roll simultaneously control the crown of the rolled material and the longitudinal direction of the plate. A rolling method characterized by controlling the shape of the rolling. 4. The rolling method according to claim 1, wherein axes of said pair of work rolls are disposed at right angles to a rolling pass direction.
In addition, a rolling method is provided in which the axes of the pair of rolls supporting the work roll are arranged so as to be able to intersect in a direction parallel to a plane including the rolled material in directions opposite to each other in the upper and lower directions, and are rolled. 5. The rolling method according to claim 4, wherein the control of the amount of coating on the surface of the work roll and the control of the intersection angle between the axes of the pair of rolls supporting the work roll are performed simultaneously. A rolling method characterized by performing sheet crown control and shape control in the sheet longitudinal direction. 6. A cooling method for cooling a work roll between the pair of work rolls and the pair of rolls supporting the work roll according to the rolling method according to claim 1. A rolling method characterized in that oil is supplied as an oil which also serves as roll cooling and inter-roll lubrication, or an oil which can be mixed with a roll coolant oil as an inter-roll lubricant is supplied. 7. The rolling method according to claim 1, wherein the coating on the surface of the work roll is ground using a brush device to support the axis of the work roll and the work roll. A rolling method, wherein the quality of the surface of the rolled material is controlled by simultaneously changing the intersection angle with the axis of the roll and grinding by the brush device. 8. The rolling method according to claim 2, wherein the rolling in which the coating of the rolled material is formed on the work rolls is performed by a tandem rolling facility comprising a plurality of rolling mills, wherein at least the final stand is rolled. And rolling at a crossing angle of the work roll set to a value near 0 degree including 0 degree. 9. The rolling method according to claim 8, wherein at least in the rolling of the final stand, the shape control of the rolled material in the strip crown and strip longitudinal direction is performed by means other than the control of the crossing angle of the work roll. Is performed as main control means. 10. The rolling method according to claim 4, wherein the rolling in which the coating of the rolled material is formed on the work rolls is performed in a tandem rolling facility comprising a plurality of rolling mills, at least in the rolling of the final stand. Apply,
A rolling method, wherein the crossing angle of the pair of rolls supporting the work roll is set to a value near 0 degree including 0 degree, and rolling is performed. 11. The rolling method according to claim 10, wherein control of the shape of the rolled material in the longitudinal direction of the sheet crown and the sheet is performed by means other than the control of the crossing angle of the rolls supporting the work roll. A rolling method, which is performed as main control means. 12. A rolling method in which a coating of a rolled material is formed on a work roll by using a reverse rolling facility, wherein the rolling method according to claim 2 is applied to at least the last pass rolling. The crossing angle of the roll
A rolling method characterized by rolling at a value near 0 degrees including 0 degrees. 13. The rolling method according to claim 12, wherein the control of the shape of the rolled material in the sheet crown and the sheet longitudinal direction is performed by means other than the control of the crossing angle of the work roll as a main control means. A rolling method, characterized in that: 14. A rolling method for performing rolling in which a coating of a rolled material is formed on a work roll using a reverse rolling facility, wherein the rolling method according to claim 4 is applied to at least the last pass rolling. A rolling method, wherein the crossing angle of the pair of rolls supporting a roll is set to a value near 0 degree including 0 degree, and rolling is performed. 15. The rolling method according to claim 14, wherein the control of the shape of the rolled material in the plate crown and the plate longitudinal direction is performed by using a means other than controlling the intersection angle of the work roll as a main control means. A rolling method, characterized in that: And a pair of upper and lower work rolls and at least a pair of rolls respectively supporting the work rolls.
In a rolling mill that performs rolling in which a part of the rolled material adheres to the work roll to form a coating, an excessive coating that adheres to the surface of the work roll.
An axis of the work roll and an axis of the roll supporting the work roll are disposed so as to be able to intersect with each other in a plane parallel to a plane including the rolled material so as to be removed. Input means for inputting information relating to the type of, and the intersection of the axis of the work roll and the axis of the roll supporting the work roll according to the input information so that the thickness of the coating is a desired amount. A rolling mill provided with an intersection angle setting means for setting an angle. 17. The rolling mill according to claim 16, wherein the axes of the pair of work rolls are disposed so as to be able to cross in a direction parallel to a plane including the rolled material in mutually opposite directions. A rolling mill, wherein the axes of the pair of rolls supporting the rolls are disposed at right angles to a rolling pass direction. 18. The rolling mill according to claim 16, wherein the axes of said pair of work rolls are disposed at right angles to the direction of the rolling pass, and the axes of said pair of rolls supporting said work rolls are formed of said roll. A rolling mill, wherein the rolling mill is arranged so as to be able to intersect in directions opposite to each other in a plane parallel to a plane including the material. 19. The rolling mill according to claim 17, wherein said pair of rolls supporting said work rolls are reinforcing rolls, and said pair of work rolls and said pair of reinforcing rolls form a four-high rolling mill. A rolling mill, comprising: 20. The rolling mill according to claim 17, wherein the pair of rolls supporting the work roll is an intermediate roll, and the pair of intermediate rolls are further supported by a pair of reinforcing rolls. A rolling mill comprising a work roll, the pair of intermediate rolls, and the pair of reinforcing rolls, which constitute a six-high rolling mill. 21. The rolling mill according to claim 16, wherein a coolant for cooling the work rolls is provided between the pair of work rolls and the pair of rolls supporting the work rolls. Oil supply means for supplying oil as oil for both roll cooling and inter-roll lubrication, or oil supply means for supplying oil that can be mixed with roll coolant oil as inter-roll lubrication oil is provided. Rolling mill. 22. The rolling mill according to claim 16, further comprising a brush device for adjusting a coating amount on a surface of the work roll. 23. A rolling mill comprising a plurality of stands of rolling mills for performing tandem rolling, wherein rolling is performed so that a coating of a rolled material is formed on a work roll of the rolling mill. Claim 16
23. A rolling plant comprising the rolling mill according to any one of the above items. 24. A rolling equipment comprising a rolling mill for performing reverse rolling, wherein the rolling mill performs rolling in which a coating of a rolled material is formed on a work roll of the rolling mill.
A rolling mill having a rolling mill having a function described in any one of 6 to 22.