JP3096524B2 - Local spray nozzle device of roll, local cooling device, and local cooling method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local spray nozzle device for a rolling roll for locally cooling a portion of the roll having poor flatness due to the heat generated by processing the rolled material in order to improve the shape of the rolled material and obtain a uniform product. The present invention relates to a local cooling device and a local cooling method.

[0002]

2. Description of the Related Art One of the causes of a defective shape of a rolled material, particularly a thin plate after rolling, is that the roll is locally expanded by the heat generated during processing of the rolled material and the flatness of the roll surface is deteriorated. . For example, as shown in FIG. 8A, a part of the surface of the rolling roll 80 locally expands due to the heat generated by the processing of the rolled material, and the flatness defect portion 8 shown by the broken line in the drawing.
1 is formed, as shown in FIG.
In the case of 0, the position corresponding to the shape defect portion 81 of the rolling roll 80 is locally rolled excessively, and a shape defect portion 92 is generated. Such a defective shape portion often occurs in a quarter portion of a rolled material. By locally cooling the shape-defective portion 81 of the rolling roll 80 and bringing this portion into a state shown by a broken line 82, the shape defect of the rolled material can be corrected.

[0003] On the entry side of the rolled material, a roll roll cooling coolant for cooling the entire roll and lubricating between the rolled material and the roll is usually installed. By applying a unique local cooling method,
A uniform product can be obtained by correcting the defective shape of the rolled material.

A conventional technique for improving the flatness of a rolled material as described above will be described. First, JP-A-62-686
In Japanese Patent Publication No. 12 (first prior art), a fixed gap is provided between a cooling water jacket provided on the rolled material discharge side along the outer circumference of the rolling roll and the rolling roll, and the cooling water is provided in the fixed gap. And a method for locally cooling the rolling roll by supplying the same.

In Japanese Patent Application Laid-Open No. 2-133107 (second prior art), as in the first prior art, a cooling water jacket provided on the rolled material delivery side and a rolling roll are provided. Disclosed is a method of locally cooling a rolling roll by supplying cooling water to a predetermined gap, and further providing a seal portion using vacuum exhaust above and below a cooling water jacket to avoid leakage of cooling water. .

In Japanese Patent Application Laid-Open No. Hei 2-241605 (third prior art), a cooling water jacket provided on the rolled material discharge side along the outer circumference of a rolling roll is divided into a plurality in the axial direction, and the divided cooling water jackets are divided. A method is disclosed in which the gap between each cooling water jacket and the rolling roll is made variable and the cooling capacity distribution is made variable in the axial direction of the rolling roll.

However, in the first and second prior arts described above, the cooling jacket covers almost the entire axial direction of the rolling roll, so that the local cooling effect is small. , It becomes difficult to keep the gap between the cooling water jacket and the rolling roll constant, and there has been a problem that the cooling capacity tends to change. Further, in the third prior art, the structure is complicated, and there is no means for partitioning a plurality of jackets, so that the local cooling effect is also small, and it is difficult to keep the gap constant in response to the reduction in the roll diameter. However, there is a problem that the cooling capacity tends to change.

To solve the above-mentioned problems of the prior art utilizing the cooling water jacket, Japanese Patent Laid-Open Publication No. Sho 62-173017 (fourth prior art) discloses a method in which a nozzle is installed on the outlet side of a rolled material. A method of injecting a coolant from the nozzle to locally cool a rolling roll is disclosed. According to this method, since the coolant injected from the nozzle is used, the local cooling effect is increased, the roll diameter can be changed, and the structure is simple. Here, in addition to the above-described local cooling, local heating using an induction heating device is also used in accordance with the width direction position of the rolled material.

[0009] In the fourth prior art, as a coolant for local cooling, in order to exhibit the effect of local cooling,
Fresh water at a temperature of about 20 ° C., which is lower than that of the rolling cooling coolant, and which does not contain fats and oils is used as the cooling water. On the other hand, the rolling roll cooling coolant provided on the normal rolled material entry side contains 1 to 5% of fats and oils for lubrication, and 40 to 60% of fats and oils for sufficiently dissolving the fats and oils in the cooling water. Is kept at a high temperature. The reason why fresh water is used as a coolant for local cooling is that fats and oils do not dissolve in water at a low temperature of about 20 ° C.

[0010]

In the first, second, and third prior arts using a cooling water jacket, the effect of locally cooling the rolling roll is small, and the effect of changing the roll diameter is small. There is a problem that it is difficult to keep the gap between the cooling water jacket and the rolling roll constant, and the cooling capacity tends to change.

Further, in the fourth prior art, when fresh water injected into a rolling roll as a coolant mixes into a cooling roll cooling coolant on a normal rolled material entry side, the fat and oil concentration thereof is reduced. There was a problem that the amount of fresh water for cooling had to be limited, and the ability to control the shape of the plate by local cooling was reduced.

Further, since the injected fresh water collides with the rolling roll and is widely dispersed above the rolling roll, there is a problem that the local cooling effect is reduced.

It is an object of the present invention to provide a rolling mill which does not change its cooling ability even if the diameter of the rolling roll changes, restricts the range in which the cooling liquid injected and colliding with the rolling roll is dispersed, and can sufficiently exert the local cooling effect. It is to provide a local spray nozzle device, a local cooling device and a local cooling method for a roll.

Another object of the present invention is to reduce the concentration of fats and oils by mixing a cooling liquid (generally, cooling water) injected into and impinged on a rolling roll into a cooling roll cooling coolant on a normal rolled material entry side. An object of the present invention is to provide a local spray nozzle device, a local cooling device, and a local cooling method for a rolling roll that can prevent the occurrence of the problem.

Still another object of the present invention is to reliably and automatically locally cool a rolling roll having a shape defect corresponding to a shape defect of a rolled material, thereby accurately correcting the shape of the rolled material. It is an object of the present invention to provide a local spray nozzle device, a local cooling device, and a local cooling method for a rolling roll.

[0016]

In order to achieve the above object, a local spray nozzle device for a rolling roll according to the present invention comprises a rolling roll for locally cooling the surface of the rolling roll with a spray liquid of a cooling liquid injected from a spray nozzle. In the local spray nozzle device, the coolant is sprayed from the spray nozzle to limit the range of dispersion.
A <br/> first wall surrounding the space between the spray nozzle and the rolling roll surface, the first found provided on the end facing the rolling roll surface of the wall is, prior Symbol first wall Sealing means for sealing an end of the body and the surface of the rolling roll;
A cooling liquid recovery means provided on the wall of the first wall for recovering a cooling liquid for locally cooling the surface of the rolling roll ;
Surrounds the spray liquid of the injected cooling liquid in the section
Installed so that the end facing the roll surface
Are located at a predetermined gap from the roll surface.
A second wall, wherein the first wall extends from the predetermined gap.
The rolling row passes through the space between the wall and the second wall.
The cooling liquid whose surface has been locally cooled is passed through the cooling liquid collecting means.
And a second wall that allows overflow .

[0017]

Preferably, the sealing means is provided so as to form a closed curve over the entire circumference of an end of the first wall facing the surface of the rolling roll.

In order to achieve the above object, the present invention
According to the local spray nozzle device of the rolling roll spray
Rolling by spray liquid of cooling liquid injected from nozzle
Local spraying of rolling rolls to locally cool the roll surface
In the squeeze device, it is injected from the spray nozzle
A first wall surrounding the spray liquid of the cooling liquid;
Provided at an end of the wall body facing the surface of the rolling roll.
Seal the end of the first wall and the surface of the rolling roll.
Sealing means provided on the first wall body and the rolling roller provided on the first wall body.
Coolant collecting means to collect the coolant that has locally cooled the cooling surface
And a sealing means including a plurality of nozzles for injecting high-pressure gas onto the surface of the rolling roll.

In order to achieve the above object, the present invention
According to the local spray nozzle device of the rolling roll spray
Rolling by spray liquid of cooling liquid injected from nozzle
Local spraying of rolling rolls to locally cool the roll surface
In the squeeze device, it is injected from the spray nozzle
A first wall surrounding the spray liquid of the cooling liquid;
Provided at an end of the wall body facing the surface of the rolling roll.
Seal the end of the first wall and the surface of the rolling roll.
Sealing means provided on the first wall body and the rolling roller provided on the first wall body.
Coolant collecting means to collect the coolant that has locally cooled the cooling surface
A sealing member having a step, wherein the sealing means includes a tube which is expanded by a high-pressure gas, and a sealing member which is pressed by the tube to press the surface of the rolling roll.

Further, in order to achieve the above object, a local cooling device for a rolling roll according to the present invention is provided with a spray nozzle.
Rolled roll surface by sprayed coolant spray
The local spray nozzle device of the rolling roll to locally cool the
The spray of the cooling liquid injected from the spray nozzle
A first wall surrounding the play liquid and a front wall of the first wall;
The first roll is provided at an end facing the roll surface.
Sealing hand for sealing the end of the wall and the surface of the rolling roll
A step and a surface of the rolling roll provided on the first wall body.
Having a cooling liquid collecting means for collecting the locally cooled cooling liquid
A local spray nozzle apparatus of at least one rolling roll that, a driving means for moving the local spray nozzle device in the axial direction of the rolling roll, and detecting means for detecting a defective shape portion of rolled rolled material, Control means for controlling the driving means so as to move the local spray nozzle device to a position of the rolling roll corresponding to a shape defect portion of the rolled material based on a signal detected by the detection means.

Preferably, the apparatus further includes at least two local spray nozzle devices for locally cooling a position of the rolling roll corresponding to at least a quarter portion having a width of the sheet, and the driving means connects the two local spray nozzle devices to the rolling roll. Actuators that move independently of each other in the axial direction.

Preferably, the control means controls the driving means so that the local spray nozzle device periodically moves in the axial direction of the rolling roll.

Preferably, there are three local spray nozzle devices, one of which cools the vicinity of the center in the axial direction of the roll, and the other two cools the vicinity of both ends of the roll. Are located.

Preferably, the local spray nozzle device is installed on the rolled material discharge side of the rolling roll.

[0026] Preferably, the local spray nozzle device is installed on a rolled material discharge side of a lower roll of the rolling roll.

[0027] Preferably, the apparatus further comprises cooling amount adjusting means for adjusting a cooling amount of the local spray nozzle device based on a signal from the detecting means.

In order to achieve the above object, a method for locally cooling a rolling roll according to the present invention comprises the steps of: In a method for locally cooling a rolling roll for locally cooling with a spray liquid of cooling fresh water sprayed from a cooling spray nozzle, a first wall surrounding the spray liquid of cooling fresh water, and a first wall end. A sealing means for sealing a portion and the surface of the rolling roll, and adjusting the degree of sealing of the sealing means to leak the fresh water for cooling from the first wall and mix it with the coolant for cooling the rolling roll. This compensates for the water evaporation.

[0029]

In the present invention constructed as described above, since the rolling roll is locally cooled by the spray liquid of the cooling liquid injected from the spray nozzle, even if the roll diameter changes due to a temperature change, abrasion, or the like, the cooling capacity is reduced. Does not change. Further, by providing the first wall body surrounding the spray liquid of the cooling liquid, the range in which the cooling liquid sprayed and collided with the rolling roll is dispersed is limited, and the dispersed cooling liquid is used as a normal cooling roll cooling coolant. Mixing or spreading above the rolling rolls is avoided. Also, by providing sealing means at the end of the first wall facing the rolling roll surface,
The end of the first wall and the surface of the rolling roll are sealed to form the first
The leakage of the coolant to the outside of the wall of the roll is restricted, and the leakage of the coolant into the coolant for cooling the rolling rolls is limited. Further, the cooling liquid obtained by locally cooling the rolling rolls is collected by the cooling liquid collecting means provided on the first wall.

A second wall surrounding the spray liquid of the cooling liquid sprayed from the spray nozzle is further provided inside the first wall, and faces the surface of the rolling roll of the second wall. By providing a predetermined gap between the end portion and the surface of the rolling roll, the cooling liquid that locally cools the surface of the rolling roll uniformly spreads the space between the first wall and the second wall from the gap. It flows out as a smooth flow and is collected by the cooling liquid collecting means provided on the first wall. Therefore, there is no possibility that the cooling liquid after cooling the rolling roll interferes with the spray liquid of the cooling liquid ejected from the spray nozzle to disturb the shape thereof, and the roll can be locally cooled without fail.

The sealing means provided at the end of the first wall forms a closed curve over the entire periphery of the end facing the surface of the rolling roll, so that the end of the first wall and the surface of the rolling roll are formed. Is securely sealed, and leakage to the outside of the first wall body is restricted.

Further, by providing a sealing means for injecting high pressure gas from a plurality of nozzles to the surface of the rolling roll at the end of the first wall, sealing can be performed in a non-contact manner,
It is possible to adjust the degree of sealing without changing or abrading the surface of the rolling roll.

Further, by providing a sealing means at the end of the first wall body, which presses the sealing member with a tube which is inflated by the high-pressure gas and uniformly presses the surface of the rolling roll with the sealing member, uniform sealing can be achieved. This makes it possible to adjust the degree of sealing. In addition, the cooling degree is intentionally leaked by adjusting the sealing degree, and the leaked water can also provide a lubricating effect between the sealing means and the rolling roll.

Further, a driving means for driving the local spray nozzle device in the axial direction of the rolling roll is provided, and the local spray nozzle is positioned at the axial position of the rolling roll corresponding to the defective portion of the rolled material based on a signal detected by the detecting means. By controlling the driving means by the control means so as to move the nozzle device, the position of the rolling roll corresponding to the defective portion of the rolled material can be reliably and automatically locally cooled, and the flatness of the rolled material can be reduced. Defects can be reliably corrected.

Further, the defective portion of the quarter portion in the strip width direction of the rolled material is not always located at a symmetrical position with respect to the center in the strip width direction, but in the present invention, at least two portions for locally cooling the quarter portion are provided. The two local spray nozzle devices are driven by driving means including actuators that move independently in the axial direction of the rolling roll, so that even when the defective portion is located asymmetrically with respect to the center in the plate width direction, Can be locally cooled.

Further, by controlling the driving means by the control means so that the local spray nozzle device is periodically traversed in the axial direction of the rolling roll, the predetermined area is locally cooled even when the defective part is wide to some extent. be able to.

By arranging a total of three local spray nozzle devices near the center and near both ends in the axial direction of the rolling roll, it is possible to locally cool the rolled material at an appropriate position in the sheet width direction.

Also, by installing the local spray nozzle device on the rolled material exit side of the rolling roll, the coolant does not directly adhere to the rolled material, and therefore, the coolant remains on the rolled material and rusts. There is no. In this case, since the cooling liquid after cooling may adhere to the surface of the rolled material, it is more preferable to locally cool the lower roll.

Further, by providing cooling amount adjusting means for adjusting the cooling amount of the local spray nozzle device based on the signal from the detecting means, the local cooling is automatically performed in accordance with the degree of the shape defect of the rolled material. By varying the degree, local cooling can be ensured. .

Further, by adjusting the degree of sealing of a sealing means provided at an end of the first wall facing the surface of the rolling roll, fresh water for cooling is leaked outside the first wall, and this fresh water is usually discharged. To the cooling material for cooling the rolling rolls provided on the rolled material entry side. This compensates for the water evaporation of the cooling roll cooling coolant, and keeps the oil concentration of the cooling roll cooling coolant constant.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A local spray nozzle device, a local cooling device and a local cooling method for a rolling roll according to an embodiment of the present invention will be described with reference to FIGS. In this embodiment, 4
This is a typical example applied to a rolling device that performs rolling in a step rolling mill, and in this rolling device, a plate thickness of 0.1 to 3.2 mm,
A rolled material having a width of 600 to 1800 mm is rolled at a maximum rolling speed of 2000 m / mim. As the material to be rolled, various materials such as iron and non-ferrous metals can be applied.

FIGS. 1 and 2 are views showing a local cooling device for a rolling roll according to the present embodiment. As shown in FIG.
This local cooling device is applied to a rolling device having a four-stage roll composed of a pair of work rolls 1 and 2 and a pair of back rolls 3 supporting the same, and includes three local spray nozzles. A device 100 (see FIG. 2), a cooling water tank 13 as a system for supplying cooling water, and a motor 1
4. Pump 15, valve 33, pipe 25a, valve 34 as a system for supplying high-pressure gas for sealing, pipe 3
5, 36, and a cylinder 16 and a valve 16 as a system for supplying pressure oil for driving the local spray nozzle device 100
a, pipes 16b and 16c, a defective portion detector 11 for detecting a defective portion of a rolled material, and a control panel 12 for controlling each of the above-described systems by a detection signal from the defective portion detector 11. In addition to the local cooling device, a normal rolling roll cooling device 200 using a cooling roll cooling coolant described later is provided on the entry side of the rolled material 10.

The local spray nozzle device 100 is provided on the exit side of the lower work roll 1. The reason for this is that when the local spray nozzle device 100 is installed on the entry side of the work rolls 1 and 2 or on the exit side of the upper work roll 1, cooling water after locally cooling the work rolls adheres to the surface of the rolled material, and the rolled material is removed. This is because there is a risk of rusting or slipping between layers of the coil when the rolled material is wound into a coil shape, resulting in flaws on the plate surface. In addition, when a measure to avoid the adhesion of the cooling water to the surface of the rolled material is separately taken, or when the adhesion of the cooling water is not a problem, the normal coolant on the exit side of the upper work roll 1 or the entrance side of the rolled material is used. May be provided on the rolled material entry side in combination with the rolling roll cooling device 200 according to.

As shown in FIG. 2, in the present local cooling device, three local spray nozzle devices 100 are arranged apart from each other in the axial direction of the work roll 1, and the central one is fixedly provided at both ends. The parts are mounted movably in the axial direction of the work roll 1.

Each of the local spray nozzle devices 100 includes:
An injection unit 101 (described later) for injecting cooling water as a spray liquid, a slider block 28 to which the injection unit 101 is attached, a cylinder 28a connected to a hydraulic source (not shown) for moving the slider block 28 forward and backward in the rolling direction, and a slider block. And a block 28b for supporting the cylinder 28a. The slider 28 is advanced and retracted by the cylinder 28a to adjust the distance between the injection unit 101 and the work roll 1.

Of the three local spray nozzle devices 100, the two at both ends are guided by two guide bars 18 provided between the rolling stands 17 on both sides of the work roll, with the block 28b being connected via a joint 19. Cylinder 16
Attached to. The cylinder 16 is connected to a valve 16a via a pipe 16c.
a is connected to a hydraulic source (not shown) via a pipe 16b. Then, as described later, the valve 16a is adjusted by the control signal 12c based on the detection value of the defective portion detector 11, the cylinder 16 is operated, and the local spray nozzle device 100 is moved to an appropriate axial position of the work roll 1. And perform local cooling.

The two local spray nozzle devices 100 at both ends are mainly used for correcting a shape defect due to quarter extension or a shape defect due to ear extension, while the central spray nozzle device 100 at the center portion is mainly used for rolling material. Used for correcting shape defects due to elongation. in this way,
By installing a total of three local spray nozzle devices 100 near the center and both ends in the axial direction of the work roll 1, a large amount of shape defects often occur near the center and both ends (quarters) in the plate width direction. Parts can be modified. Actually, the shape defect due to the middle elongation may be slightly deviated from the center, and in such a case, the work roll may be moved in the axial direction similarly to the end portions. Further, it is not always necessary to install the three local spray nozzle devices 100 as described above, and three or more spray nozzle devices 100 may be installed or three or less depending on the state of occurrence of the shape defect.

FIG. 3 is a sectional view of the jetting section 101 at the tip of the local spray nozzle device 100. The spraying unit 101 includes a spray nozzle 21, a first wall 22, a second wall 23,
It comprises a seal part 24, a cooling water pipe 25, a lower drain port 26, and a drain pipe 27. The spray nozzle 21 is attached by being screwed into a slider block 28 to be described later, and cooling water pumped from a cooling water pipe 25 connected to a pipe 25 a
1 and sprayed as a spray liquid 50 to locally cool the work roll 1. Also, the slider block 28
Is provided with a second wall 23 so as to surround the spray liquid 50, and a first wall 22 is provided outside the second wall 23. A predetermined gap 23a is provided in a portion where the end of the second wall faces the surface of the work roll 1, and the cooling water sprayed on and impinged on the surface of the work roll 1 becomes a flowing water layer 29, and the gap 23a is formed. Through the second wall 2
3 and is discharged into a space 30 between the first wall 22. By providing the second wall 23 in this manner,
The cooling water after locally cooling the work roll 1 or the cooling water that collides with and rebounds from the work roll 1 does not interfere with the spray liquid 50 and disturbs the shape of the spray liquid 50. And the spray liquid 50 can reliably cool the work roll 1 locally. The cooling water that has flowed out into the space 30 is collected at a lower drain port 26 provided at the lower outside of the first wall, and is collected by the drain pipe 2.
7 and is collected in a cooling water tank 13 (see FIG. 1).

The first wall 22 is provided to limit the range in which the cooling water is dispersed, and to prevent the dispersed cooling water from being mixed into the coolant 20 described later or spreading above the work roll 1. The sealing portion 24 is formed so as to form a closed curve over the entire circumference of the end portion facing the surface of the work roll 1.
Is provided. This seal part 24 is a hollow conduit 31
And a number of nozzles 32 provided in the hollow conduit 31. By jetting high-pressure gas from the nozzles 32 toward the work roll 1, the end of the first wall 22 and the surface of the work roll 1 are formed. Between the second wall 2
3 restricts the cooling water discharged to the space 30 from flowing out of the first wall. The high-pressure gas is adjusted by a valve 34 from a high-pressure gas supply source (not shown) via a pipe 35 as described later, supplied to a hollow conduit 31 from a pipe 36, and ejected from a nozzle 32. According to the method using the ejection of the high-pressure gas, since the seal member that comes into contact with the work roll 1 is not used, the gloss of the surface of the work roll 1 does not change or wear.

FIG. 4 is an arrow view of the injection unit 101 shown in FIG. 3 when viewed from the IV-IV direction on the work roll surface. However, the left and right directions in the figure correspond to the axial direction of the work roll 1. As shown in FIG. 4, the spray liquid 50 due to the cooling water injected from the spray nozzle 21 collides with the work roll 1 in an elongated form orthogonal to the axial direction of the work roll 1. A second wall 23 and a first wall 22 are provided so as to surround the spray liquid 50. Also, the first wall 22
Is provided with a number of nozzles 32 as described above, and high-pressure gas is ejected from the nozzles 32. Note that the spray form of the spray liquid 50 does not necessarily need to be orthogonal to the axial direction of the work roll 1 as described above, and may be slightly inclined with respect to the direction orthogonal to the axial direction of the work roll 1.

On the rolled material entry side, the ordinary roll roll cooling device 200 using the roll roll cooling coolant is installed as described above. The coolant 40 is stored in a coolant tank 41 and is pumped up and pressurized by a pump 43 driven by a motor 42. The flow rate of the coolant 40 is determined by the valve 44 and sent to the header 45. As shown in FIG. 2, the header 45 is divided and installed on the side of the rolling material 10 of the rolling roll, and each header 45 is further provided with several nozzles 46. The coolant liquid 40 is sprayed over the entire length to cool the rolling rolls 1 and 2.

The coolant 40 contains several percent of oils and fats for lubrication, and the oils and fats are lubricated simultaneously with the cooling. The temperature of the coolant liquid 40 is relatively high at 40 to 60 ° C. in order to keep the oils and fats in an emulsion state. For this reason, the water easily evaporates, and fresh water is usually supplied regularly.

In the above-described configuration, when a shape defect occurs in the rolled material 10, the shape defect portion is detected by the defect portion detector 11, and this detection signal 11 a is taken into the control panel 12. Then, a control signal 12a from the control panel 12 is input to the hydraulic valve 16a, the amount of pressurized oil supplied from the actuator (not shown) via the pipe 16b is adjusted, and this pressurized oil is supplied from the pipe 16c to the cylinder 15, The cylinder 15 is operated to move the local spray nozzle device 100 such that the position of the spray nozzle 21 faces the flatness-defective portion of the work roll 1. Thereby, the spray liquid 50 surely collides with the flatness-defective portion of the work roll 1, and this position is surely locally cooled.

The control signal 12b from the control panel 12 is input to the valve 33, and the valve 33 is controlled to adjust the supply amount of the cooling water. That is, the valve 33 is controlled according to the intensity of the detection value detected by the defective portion detector 11, that is, the degree of flatness defect of the work roll 1, and the motor 14
The amount of low-temperature cooling water pumped up and pressurized from the cooling water tank 13 by the pump 15 driven by is adjusted. This cooling water is supplied to the local spray nozzle device 1 via a pipe 25a.
And sprayed from the spray nozzle 21 to locally cool the work roll. The greater the degree of flatness failure of the work roll 1, the greater this valve 3
3 is adjusted so that the amount of cooling water injected from the spray nozzle 21 is increased.

Further, by adjusting the supply amount of the high-pressure gas sent to the seal portion 24 by the valve 34 (see FIGS. 1 and 3), the degree of sealing is adjusted and fresh water as cooling water for the local spray nozzle device 100 is adjusted. Rolling roll cooling device 200 installed on the rolled material entry side
And replenish the water by mixing with the coolant liquid 40. That is, when the supply amount of the high-pressure gas sent to the seal portion 24 is slightly reduced, the sealing degree is weakened, and a part of the cooling water that has collided with the work roll 1 leaks from the first wall to become the leaked water 52. By collecting the leaked water 52 in the coolant tank 41, the water evaporation of the coolant 40 is indirectly supplied.

In the present invention, the coolant 40
Hydration can be done automatically. As shown in FIG. 1, the coolant liquid 4 in the coolant tank 41
The fat / oil concentration of 0 is detected by the fat / oil concentration detector 47, the detection signal 12d is taken into the control panel 12, and the control signal 12c based on this is input from the control panel 12 to the valve. The valve 34 is controlled by the control signal 12c, and the supply amount of the sealing high-pressure gas supplied from the high-pressure gas supply source (not shown) via the pipe 35 is adjusted. This high-pressure gas is led to the conduit 31 via the pipe 36, and the degree of sealing between the end of the first wall 22 and the surface of the work roll 1 is adjusted. Then, the amount of the leaked water 52 from the first wall 22 to the coolant tank 41 is automatically adjusted, and the coolant liquid 40 is maintained at a predetermined concentration.

As described above, according to the present embodiment, since the work roll 1 is locally cooled by using the spray liquid 50, even when the diameter of the work roll 1 is reduced due to a temperature change, abrasion, or the like, the local cooling is performed. The effect does not decrease. Further, since the first wall 22 is provided, the range in which the cooling water is dispersed is limited, and the dispersed cooling water is mixed into the coolant liquid 40,
Spreading above the work roll 1 is avoided. Also,
A seal portion 24 is provided so as to form a closed curve over the entire periphery of the end of the first wall 22 facing the surface of the work roll 1,
Since the cooling water is collected from the lower drain port 26, the leakage of the cooling water is restricted, and the leakage of the cooling water into the coolant 40 is restricted.

Further, a second wall 23 surrounding the spray liquid 50 is provided inside the first wall 22 and the work roll 1 is provided.
Since a predetermined gap 23a is provided at the end facing the surface,
The cooling water can flow out uniformly from the gap 23a into the space 30 as a smooth flow.
There is no danger that the shape of the spray liquid 50 will be disturbed by interfering with zero, and the work roll 1 can be surely locally cooled.

Further, the seal portion 24 is constituted by a hollow conduit 31 and a number of nozzles 32, and the end of the first wall 22 and the surface of the work roll 1 are connected to each other by a non-contact method of supplying a high-pressure gas thereto. Since the gap between them is sealed, the gloss of the surface of the work roll 1 does not change or wear, and the degree of sealing can be adjusted.

A total of three local spray nozzle devices 10 are provided near the center and both ends of the work roll in the axial direction.
0, and the two local spray nozzle devices 100 near both ends are positioned in the axial direction of the work roll 1 corresponding to the defective portion of the rolled material 10 based on the control signal 12a based on the detection from the defective portion detector 11. , The position of the work roll 1 corresponding to the defective portion of the rolled material 10 can be reliably and automatically locally cooled, and the shape of the rolled material 10 can be reliably corrected. .

Further, since the local spray nozzle device 100 is installed on the lower work roll 1 on the side of the rolled material 10 on the lower side, the cooling water does not directly contact the rolled material. It does not rust.

Further, by controlling the valve 33 based on the control signal 11b based on the detection from the defective portion detector 11 and adjusting the amount of cooling water, the rolled material 10 is automatically adjusted according to the degree of the shape defect. By changing the degree of local cooling, it is possible to reliably perform local cooling.

Further, since the valve 34 is controlled based on the oil concentration of the coolant 40 to adjust the amount of the high-pressure gas to adjust the degree of sealing of the seal portion 24, the flow from the first wall 22 to the coolant tank 41 is controlled. The amount of leaked water is automatically adjusted, and the coolant 40 is maintained at a predetermined concentration.

Next, a local spray nozzle device, a local cooling device, and a local cooling method of a rolling roll according to another embodiment of the present invention will be described with reference to FIG. In this embodiment, the configuration of the seal portion is different from that of the above-described embodiment. Other configurations and functions are the same as those of the above-described embodiment.

FIG. 5 is a detailed sectional view of the jetting portion 101A at the tip of the local spray nozzle device according to the present embodiment. The configuration of the injection unit 101A is the same as the configuration of the injection unit 101 illustrated in FIG. 4 except that the configuration of the seal unit 24A is different. The seal portion 24A is configured by housing a seal member 37 and a tube 38 in a hollow portion provided at the end of the first wall 22A facing the work roll 1, and the tube 38 is compressed by high-pressure gas. By inflating and uniformly pressing the seal member 37 against the work roll 1, the gap between the end face of the first wall 22 </ b> A and the surface of the work roll 1 is uniformly sealed. This high-pressure gas is adjusted by the valve 39 in the same manner as in the above-described embodiment, and is supplied to the tube 38 from the pipe 39a. Also, the control panel 12 (see FIG. 1)
The valve 39 is controlled by the control signal 12c from the controller to adjust the supply amount of the high-pressure gas supplied to the tube 38, and a part of the fresh water as the cooling water of the local spray nozzle device is intentionally leaked from the seal member 37. Accordingly, the water supply of the coolant 40 in the coolant tank 41 can be performed by the leaked water in the same manner as in the above-described embodiment. further,
Due to the leaked water, a lubricating effect between the seal member 37 and the work roll 1 is also obtained, and a change in gloss and abrasion on the surface of the work roll 1 can be avoided.

As described above, according to the present embodiment, the sealing portion 24A is constituted by the sealing member 37 housed in the hollow portion of the first wall 22A and the tube 38, and the tube 38 is expanded by the high-pressure gas. By uniformly pressing the seal member 37 against the work roll 1 to seal between the end surface of the first wall 22B and the surface of the work roll 1, uniform sealing is possible as in the above-described embodiment. Adjustment of the degree is also possible, and by adjusting the supply amount of the high-pressure gas, the oil concentration of the coolant liquid 40 can be maintained by the leakage water. In addition, a lubricating effect between the seal member 37 and the work roll 1 is obtained by the leaked water,
A change in surface gloss and abrasion can be avoided. In addition, the same effect as the above-described embodiment can be obtained.

Next, a local spray nozzle device, a local cooling device, and a local cooling method for a rolling roll according to still another embodiment of the present invention will be described with reference to FIG. This embodiment is different from the above-mentioned two embodiments in that the second wall is omitted from the injection unit of the local spray nozzle device. Other configurations and functions are the same as those of the above-described embodiment.

FIG. 6 is a sectional view of the injection section 101B of the local spray nozzle device according to this embodiment. Injection unit 101
In B, the second wall is omitted, and the cooling water that has locally cooled the work roll 1 is directly collected at a lower drain port 26 provided at the lower outside of the first wall 22, and a drain pipe 27 is provided.
Will be recovered. In this case, there is a possibility that the cooling water after locally cooling the work roll 1 or the cooling water that collides with the work roll 1 and rebounds interferes with the spray liquid 50.
This embodiment can be applied to a case where conditions for local cooling are not so strict.

As described above, according to this embodiment, when the conditions for local cooling are not so strict, the same effects as those of the above-described two embodiments can be obtained.

Next, a local spray nozzle device, a local cooling device, and a local cooling method of a rolling roll according to still another embodiment of the present invention will be described with reference to FIG. The local spray nozzle device according to this embodiment is different from the above three embodiments in the configuration of the spray nozzle and the shapes of the first wall and the second wall. Further, the local spray nozzle device is fixed and has a dimension extending in the entire axial direction of the work roll, and does not move in the axial direction of the work roll. Other configurations and functions are the same as those of the above-described embodiment.

FIG. 7 is a diagram showing a state of the spray liquid 50C ejected from the spray nozzle 21C of the local spray nozzle device according to the present embodiment, and is a diagram corresponding to FIG. This drawing corresponds to FIG. 4, and the left and right directions in the drawing correspond to the axial direction of the work roll 1. As shown in FIG. 7, the seven spray nozzles 21C are arranged such that the spray liquid 50C to be sprayed has an elongated spray form in which the spray liquid 50C is inclined to some extent with respect to a direction orthogonal to the axial direction of the work roll 1.
Is provided, a second wall 23C is provided so as to surround all of the spray liquids 50C, and a first wall 22C is provided outside the second wall 23C. This local spray nozzle device is of a fixed type that does not move in the axial direction of the work roll 1, and includes a first wall 22C and a second wall 22C.
The width of the wall 23C is about the same as the width of the work roll 1. Then, in accordance with the detection signal of the defective portion detector 11, cooling water is jetted from a nozzle facing the flatness defective portion of the work roll in the same manner as described with reference to FIG. 1 to perform local cooling. By providing the plurality of spray nozzles 21C in this manner, not only a flatness defective portion in a very narrow range of the work roll 1 but also a flatness defective portion in a somewhat wide range can be locally cooled as needed. In addition, 7
It goes without saying that spray nozzles other than the number may be provided.

As described above, according to this embodiment, not only the same effects as those of the above-described three embodiments can be obtained, but also, if necessary, the flatness-deficient portion of the work roll 1 over a wide range can be locally cooled. can do.

In addition to the above-described embodiment, by driving the local spray nozzle device so as to be able to periodically traverse in the axial direction of the work roll, it is possible to locally cool a flatness defective portion in a wide range to some extent.

The rolling apparatus to which the present invention is applied includes a pair of work rolls 1 and 2 and a pair of back rolls 3 supporting the same, as applied to each of the above embodiments. In addition to the rolling device to be performed, the present invention can be applied to a rolling device having five to six-stage rolls further provided with one or two intermediate rolls, or a cluster mill having many reinforcing rolls. In each of the above embodiments, the present invention is applied to a rolling device having one set of rolling rolls. However, the present invention is not limited to this, and the present invention may be applied to a tandem rolling device in which several sets of rolling rolls are arranged in series. Can also.

[0075]

According to the present invention, since the cooling is performed by the cooling liquid spray, the cooling capacity does not change even if the diameter of the rolling roll changes. In addition, since the first wall is provided, the range in which the cooling liquid is dispersed is limited, and the dispersed cooling liquid is prevented from being mixed into the normal cooling roll cooling coolant or from spreading above the rolling roll. The shape of the rolled material can be corrected with high accuracy by local cooling. Further, since the sealing means is provided on the first wall, it is restricted that the cooling liquid leaks out of the first wall and mixes with the cooling roll cooling coolant.

Further, a second liquid surrounding the spray liquid of the cooling liquid may be used.
Is provided, and a predetermined gap is provided between the end portion and the surface of the rolling roll, so that the cooling liquid after cooling does not interfere with the spray liquid of the cooling liquid to be sprayed and does not cause disturbance, and the rolling is surely performed. The roll can be locally cooled.

Further, since the sealing means forms a closed curve over the entire periphery of the first wall end, the sealing effect is ensured.

Further, since non-contact sealing means for ejecting high pressure gas from a plurality of nozzles to the surface of the rolling roll is used, the gloss of the rolling roll surface does not change or wear, and the sealing degree can be adjusted. It becomes possible.

Further, since a sealing means for pressing the surface of the rolling roll with a tube which is inflated by a high-pressure gas and a sealing member pressed against the tube is used, uniform sealing can be achieved and the degree of sealing can be adjusted. Therefore, the lubricating effect of the pressing portion can be obtained by the leaked water.

Further, since at least one local spray nozzle device is driven by the driving means and moved to the position of the rolling roll based on the signal detected by the detecting means, the position of the rolling roll corresponding to the defective portion of the rolled material can be reliably determined. Local and automatic cooling.

In addition, since at least two local spray nozzle devices installed at least in the quarter portion are independently driven, local cooling is reliably performed even when a defective portion is asymmetric with respect to the center in the plate width direction. be able to.

Further, since the local spray nozzle device is driven so as to periodically traverse in the axial direction of the rolling roll,
A predetermined area can be locally cooled.

In addition, since a total of three local spray nozzle devices are arranged near the center and both ends in the axial direction of the rolling roll, it is possible to locally cool the rolled material at an appropriate position in the sheet width direction.

Also, since the local spray nozzle device is installed on the rolled material exit side of the lower roll, the cooling liquid does not directly adhere to the rolled material, and the rolled material does not rust.

Further, since the cooling amount of the local spray nozzle device is adjusted based on the signal from the detecting means, the degree of local cooling can be automatically changed according to the degree of the shape defect of the rolled material.

Further, since the cooling liquid is leaked by adjusting the degree of sealing and mixed with the cooling roll cooling coolant, the oil and fat concentration of the cooling liquid is kept constant.

[Brief description of the drawings]

FIG. 1 is a view showing a local cooling device and a local cooling method of a rolling roll according to an embodiment of the present invention.

FIG. 2 shows a local cooling device for the rolling roll shown in FIG.
It is the figure seen from the -II direction.

FIG. 3 is a sectional view showing an injection unit of a local spray nozzle device of a rolling roll according to an embodiment of the present invention.

FIG. 4 is an arrow view of an injection unit of the local spray nozzle device shown in FIG. 3 as viewed from a direction IV-IV on a rolling roll surface.

FIG. 5 is a cross-sectional view illustrating an injection unit of a local spray nozzle device of a rolling roll according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating an injection unit of a local spray nozzle device of a rolling roll according to still another embodiment of the present invention.

FIG. 7 is a diagram illustrating a state of a spray liquid sprayed from a spray nozzle of a local spray nozzle device of a rolling roll according to still another embodiment of the present invention, and is a diagram corresponding to FIG. 5;

FIG. 8A is a cross-sectional view illustrating a flatness defect of a rolling roll, and FIG. 8B is a diagram illustrating a shape defect of a rolled material.

[Explanation of symbols]

 1, 2 work roll 3 back roll 10 rolled material 11 defective part detector (detection means) 12 control panel 12a, 12b, 12c, 12d control signal 13 cooling water tank 16 cylinder (drive means) 16a valve (control means) 18 guide Bar 21, 21C Spray nozzle 22 First wall 23 Second wall 23a Gap 24, 24A Seal 26 Lower drain port 27 Water pipe 28 Slider block 29 Water layer 30 Space 31 Hollow conduit 32 Nozzle 33 Valve ( Cooling amount adjusting means) 34 Valve 37 Seal member 38 Tube 40 Coolant liquid 41 Coolant tank 45 Header 46 Nozzle 47 Oil concentration detector 50, 50C Spray liquid 52 Leaked water 100 Local spray nozzle device 101, 101A, 101B, injection unit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Sadaka Masuda 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Kazumi Jiromaru 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Japan Inside Kokan Co., Ltd. (72) Inventor Kozo Higaki 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan Kokan Co., Ltd. (56) References JP-A-5-317927 (JP, A) JP-A-3-161105 ( JP, A) JP-A-6-15315 (JP, A) JP-A-2-241604 (JP, A) JP-A-2-241605 (JP, A) JP-A-4-59106 (JP, A) (58) ) Surveyed field (Int.Cl. ⁷ , DB name) B21B 27/10 B21B 28/04

Claims (12)

(57) [Claims] 1. A cooling liquid jet sprayed from a spray nozzle.
Roller for locally cooling the roll surface with play liquid
In the local spray nozzle device of the cooling device, the cooling liquid sprayed from the spray nozzle is dispersed in a range.
The spray nozzle and the rolling roll to limit the surroundings
A first wall surrounding the surface of the roll, and an end of the first wall facing the roll surface.
An end of the first wall body and a surface of the rolling roll provided
Means for sealing the surface of the rolling roll provided on the first wall.
End and coolant recovery means for recovering the coolant that retirement is disposed so as to surround the spray liquid of the cooling liquid is the ejection inside said first wall, facing the front Symbol rolling roll surface passing but a second wall positioned at a predetermined gap with respect to the rolling roll surface, the space between the predetermined gap between the first wall and the second wall
What, first makes it possible to pass the outflow coolant that local cooling the rolling roll surface to the cooling liquid collecting means 2
Local spray nozzle apparatus of rolling rolls you; and a wall of. 2. The rolling roll according to claim 1, wherein said sealing means is provided so as to form a closed curve over the entire circumference of an end of said first wall facing said rolling roll surface. Local spray nozzle device. 3. The cooling water sprayed from a spray nozzle.
Roller for locally cooling the roll surface with play liquid
In local spray nozzle device Lumpur, spray liquid of the cooling liquid is sprayed from said spray nozzle
A first wall surrounding the first wall and the rolling wall of the first wall.
The first wall end provided at the end facing the tool surface
And sealing means for sealing the surface of the rolling roll, and
The rolling roll surface provided on the first wall is locally cooled.
And a coolant recovery means for recovering the cooling liquid, and said sealing means, local spray nozzle rolling roll you comprising a plurality of nozzles for jetting a high pressure gas to the rolling roll surface apparatus. 4. The cooling water sprayed from a spray nozzle.
Roller for locally cooling the roll surface with play liquid
In local spray nozzle device Lumpur, spray liquid of the cooling liquid is sprayed from said spray nozzle
A first wall surrounding the first wall and the rolling wall of the first wall.
The first wall end provided at the end facing the tool surface
And sealing means for sealing the surface of the rolling roll, and
The rolling roll surface provided on the first wall is locally cooled.
Cooling liquid collecting means for collecting the cooling liquid, wherein the sealing means includes a tube expanded by high-pressure gas, and a sealing member pressed by the tube to press the surface of the rolling roll. local spray nozzle apparatus of rolling rolls that. 5. The cooling water spray injected from a spray nozzle.
Roller for locally cooling the roll surface with play liquid
A local spray nozzle device, comprising:
The second surrounding the spray liquid of the cooling liquid injected from the nozzle
A first wall and a surface of the rolling roll of the first wall.
The first wall end provided at the facing end and the rolling mill end.
Sealing means for sealing the surface of the first wall, and the first wall body
The cooling liquid provided in the above and locally cooling the rolling roll surface
A coolant recovery means for recovering a local spray nozzle apparatus of at least one pressure <br/> rolling roll having a drive means for moving the local spray nozzle device in the axial direction of the rolling rolls were rolled rolled Detecting means for detecting a shape-defective portion of the material; and the driving means for moving the local spray nozzle device to a position of the rolling roll corresponding to the shape-defective portion of the rolled material based on a signal detected by the detecting means. And a control means for controlling the temperature of the roll. 6. The apparatus according to claim 1, further comprising at least two local spray nozzle devices for locally cooling a position of said rolling roll corresponding to a quarter portion having a plate width, wherein said driving means connects said two local spray nozzle devices to said rolling roll. The local cooling device for a rolling roll according to claim 5 , further comprising an actuator that moves independently in the axial direction. Wherein said control means, according to claim, characterized in that for controlling the drive means so as to traverse the local spray nozzle device periodically in the axial direction of the rolling rolls 5
A local cooling device for a rolling roll as described in the above. 8. There are three said local spray nozzle devices,
One of them is near the center in the direction of the roll axis,
The local cooling device for a rolling roll according to claim 5, wherein the other two are arranged so as to locally cool the vicinity of both ends of the rolling roll. 9. The local spray nozzle device is installed on the rolled material discharge side of the rolling roll.
The local cooling device for a rolling roll according to claim 5 . Wherein said local spray nozzle device, the local cooling device of the rolling rolls according to claim 8, characterized in that it is installed in the rolled material outlet side of the lower roll of the rolling rolls. 11. In addition, a local cooling device of the rolling rolls according to claim 5, wherein a cooling amount adjusting means for adjusting the amount of cooling of the local spray nozzle device. 12. A rolled material outlet side surface of a roll roll to be cooled from a rolled material inlet side by a roll roll cooling coolant containing oils and fats is locally cooled by a cooling liquid spraying fresh water sprayed from a cooling spray nozzle. In the method for locally cooling a rolling roll, a first wall surrounding the spray liquid of the fresh water for cooling, and sealing means for sealing an end of the first wall and a surface of the rolling roll are provided, and the seal is provided. Local cooling of a rolling roll, wherein the cooling water is leaked from the first wall body by adjusting the sealing degree of the means and mixed with the cooling roll cooling coolant to compensate for the water evaporation. Method.