JP5978752B2 - Rolling equipment - Google Patents

Description

  The present invention relates to a rolling apparatus that performs rolling while cooling a work roll with a coolant when rolling a steel strip.

  Generally, in the rolling of steel strips, the rolling rolls such as work rolls of rolling mills have an adverse effect on the roll shape (roll crown, etc.) due to processing heat generated during the rolling of the steel strips, and the steel rolls. Due to the deterioration of the shape of the strip, the thermal load and the mechanical load due to the rolling load, plastic flow and cracks are generated on the surface of the work roll, causing the rough surface of the work roll, which is transferred to the steel strip and transferred to the steel strip. There is a risk of wrinkles on the surface.

Therefore, a cooling liquid such as water is supplied (injected) to the rolling roll during rolling to cool the rolling roll. If this cooling liquid adheres to the surface of the steel strip, it will rust, or uneven burning will occur in the next annealing step, so it is essential to drain the cooling liquid from the roll.
Therefore, in order to drain the coolant from the roll, a drainer with a sealing material at the tip is installed, and the sealing material is pressed against the outer peripheral surface of the rolling roll to prevent the coolant from dropping onto the steel strip surface. To be done.

  For example, in Patent Document 1 and Patent Document 2, a draining device is disposed at the tip of the cobble guard or avoiding the splash of coolant, and this draining device uses a compressed air to seal a sealing material having a width substantially equal to the width of the steel strip. It is described that the cooling liquid is prevented from dropping onto the surface of the steel strip by being pressed against the surface of the rolling roll.

Japanese Utility Model Publication No. 1-177003 Japanese Utility Model Publication 1-177002

By the way, in a rolling mill, the rolling rolls are recombined according to deterioration such as wear of the rolling rolls or products to be produced.
Therefore, it is necessary to temporarily retract the draining device in response to the recombination of the rolling rolls, and to adjust the position of the draining device again after the recombination of the rolling rolls.

  For example, in the rolling apparatus described in Patent Document 1, the drainer is disposed at the tip with a cobble guard (or avoiding the splash of cooling liquid) as a pedestal. Release the pressing of the sealing material, retreat the cobble guard together with the drainer, reassemble the rolling roll, move the cobble guard again to the vicinity of the work roll, and use the compressed air to remove the sealing material from the peripheral surface of the work roll. Adjust the position of the drainer.

However, since the pedestal (cobble guard or the like) of the drainer needs to be configured to be movable, rattling tends to occur. Further, in order to bring the sealing material and the work roll into contact with high accuracy and satisfy the sealing performance, high accuracy is required for the position adjustment of the base.
Therefore, the positional accuracy in the horizontal direction (the width direction of the steel strip) and the orthogonal direction (the direction perpendicular to the surface of the steel strip) between the sealing material and the work roll are liable to deteriorate due to backlash and poor adjustment of the pedestal. When the accuracy of the sealing material and the work roll deteriorates, the sealing material comes into contact with each other and wears unevenly. This causes a decrease in the life of the sealing material and a decrease in drainage performance (sealability). When the drainage performance deteriorates, there is a problem that the cooling liquid falls on the surface of the steel strip and rusts or burns occur, resulting in defective products.

  Further, if the position adjustment of the pedestal is performed with high accuracy, it is possible to reduce the contact of the sealing material to satisfy the sealing performance, but it takes time for the adjustment, and the operating rate of the rolling device is lowered. There was also a problem.

  An object of the present invention is to solve the above-mentioned problems of the prior art, and even if there is backlash or poor adjustment of the pedestal, the positional accuracy between the sealing material and the work roll can be maintained, and the piece of sealing material Reduces downtime by suppressing contact and preventing life reduction due to uneven wear and product defects due to poor drainage performance, and easy adjustment of the pedestal when rolling rolls are recombined. And it is providing the rolling apparatus which can improve an operation rate.

  In order to achieve the above object, the present invention provides a rolling mill for rolling a steel strip conveyed by a predetermined conveyance path by a work roll, a cooling means for supplying a coolant to the peripheral surface of the work roll, and the work In a rolling apparatus provided with a draining device that abuts a predetermined portion of the peripheral surface of the roll and drains water, the draining device extends in the width direction of the work roll and seals against the peripheral surface of the work roll A distal end member, a proximal end member that supports the distal end member, and a pressing member that is provided on the proximal end member and presses the distal end member against a peripheral surface of the work roll. The base member is supported so as to be rotatable about an axis in at least one of the extending direction of the sealing material and the tangential direction of the peripheral surface of the work roll at the contact position of the sealing material. Providing a rolling device, characterized in that there.

In the present invention, it is preferable that the distal end member is supported so as to be rotatable around an axis in the extending direction of the sealing material and an axis in the tangential direction with respect to the base end member. .
Moreover, it is preferable that the said pressing member is provided in the both ends part side of the longitudinal direction of the said sealing material, respectively.

Moreover, it is preferable that the front end of the pressing member on the front end member side is formed in a curved surface.
Moreover, it is preferable that the tip of the pressing member on the tip member side is formed of an elastic body.

Moreover, it is preferable that the said front-end | tip member is supported with respect to the said base end member so that translation is possible in the normal line direction with respect to the said tangential direction.
Moreover, it is preferable that the drainer is provided so as to be movable away from the work roll.
Moreover, it is preferable to provide a cover that covers a space including the connecting portion between the distal end member and the proximal end member and the pressing member between the distal end member and the proximal end member.

  In the present invention having the above configuration, the draining device includes a distal end member provided with a seal material, a proximal end member that supports the distal end portion, and a pressing member that is provided on the proximal end member and presses the distal end member against the peripheral surface of the work roll. The distal end member rotates about the axis in at least one of the extending direction of the sealing material and the tangential direction of the peripheral surface of the work roll at the contact position of the sealing material with respect to the proximal end member. Because it is supported as much as possible, the positional accuracy between the sealing material and the work roll can be maintained even if the pedestal is loose or misaligned. In addition, it is possible to prevent the occurrence of product defects due to the deterioration of draining performance. Moreover, since it becomes easy to adjust the pedestal during the recombination of the rolling rolls, downtime can be reduced and the operating rate can be improved.

It is a figure which shows notionally an example of the rolling apparatus of this invention. It is a schematic perspective view which shows a part of rolling apparatus shown in FIG. (A) is a top view which shows notionally the drainer shown in FIG. 1, (B) is a BB sectional drawing of (A), (C) is C- of (A). FIG. (A)-(C) are the schematic for demonstrating an effect | action of the rolling apparatus shown in FIG. (A) is the schematic which shows another example of the rolling apparatus of this invention, (B) is the DD sectional view taken on the line of (A). (A) And (B) is the schematic which shows the conventional draining device.

  Hereinafter, the rolling apparatus of the present invention will be described in detail based on a preferred embodiment shown in the accompanying drawings.

FIG. 1 conceptually shows an example of the rolling apparatus of the present invention, and FIG. 2 is a perspective view conceptually showing the rolling apparatus shown in FIG.
A rolling device 10 shown in FIG. 1 includes a stand 12, a coolant supply means 14, a draining device 16, and a cobble guard 18.
In addition, the rolling apparatus 10 of this invention may perform hot rolling, and may perform cold rolling. Moreover, there is no limitation in particular in the steel strip S which the rolling apparatus 10 processes, What is necessary is just a steel strip processed in a normal rolling apparatus.

  Moreover, in this case, in order to simplify description, as shown in FIG. 2, the normal line direction (in the example of illustration, conveyance of the steel strip S) in the contact point of the work roll 20a and the draining device 16 (sealing material 26) is shown. Direction) is the x direction, the longitudinal direction of the draining device 16 (sealing material 26) (the width direction of the work roll 20a, the width direction of the steel strip S) is the y direction, and the work roll 20a and the draining device 16 (sealing material 26). The tangential direction (vertical direction, the direction perpendicular to the surface of the steel strip S) at the contact point is defined as z direction.

The stand 12 sandwiches and rolls the steel strip S that has been subjected to predetermined processing and is transported, and a pair of work rolls 20a and 20b that sandwich the steel strip S and a backup for supporting the work rolls 20a and 20b. This is a four-stage rolling mill having rolls 22a and 22b.
The configuration of the rolling roll (work roll, backup roll) is not limited to a four-stage type, and may be a six-stage rolling mill in which an intermediate roll is arranged between the work roll and the backup roll. Alternatively, it may be a two-stage system composed of a pair of work rolls.

  The coolant supply means 14a, 14b has a nozzle for injecting coolant, and cools the work rolls 20a, 20b by injecting (supplying) coolant to the work rolls 20a, 20b during rolling of the steel strip S. The coolant supply means 14a is arranged on the roll bite exit side of the work roll 20a, and the coolant supply means 14b is arranged on the roll bite exit side of the work roll 20b.

As described above, the rolling rolls such as the work rolls 20a and 20b increase the temperature due to the processing heat generated during the rolling of the steel strip and adversely affect the shape of the roll (roll crown, etc.). Due to the deterioration, heat load, and mechanical load due to rolling load, plastic flow and cracks are generated on the surface of the work rolls 20a, 20b, causing rough skin of the work rolls 20a, 20b, which is transferred to the steel strip S. There is a risk that wrinkles may occur on the surface of the steel strip S.
Therefore, by supplying (injecting) the coolant to the work rolls 20a and 20b and cooling the work rolls 20a and 20b by the coolant supply means 14a and 14b, deformation of the roll and rough surface of the roll may occur. And the steel strip S can be suitably rolled.

  In addition, as the cooling liquid supplied to the work rolls 20a and 20b by the cooling liquid supply means 14a and 14b, water or a mixed liquid (emulsion) containing approximately 3% of rolling oil in water is used.

The cobble guard 18 is for preventing the steel strip S during rolling from breaking and winding around the rolling roll, and the coolant supply means 14a and the steel strip in the vicinity of the work roll 20a on the roll bite exit side. It is arranged between S. The cobble guard 18 also has a function of preventing the spray of the injected coolant from falling on the steel strip S.
Further, the cobble guard 18 is provided so as to be movable by a moving means (not shown) and can change the distance from the work roll 20a. Thereby, at the time of recombination of a rolling roll, the cobble guard 18 can be moved in the direction away from the work roll 20a to recombine the rolling roll.
The cobble guard 18 also has a function as a base for the drainer 16.

The drainer 16 is for preventing the coolant supplied to the work roll 20 a by the coolant supply means 14 a from dropping on the surface of the steel strip S, and is disposed at the tip of the cobble guard 18.
FIG. 3A shows a schematic plan view of the draining device 16 viewed from the z direction, FIG. 3B shows a cross-sectional view taken along the line BB of FIG. 3A, and FIG. ) Is a cross-sectional view taken along the line CC of FIG. In FIG. 3A, a part of the cover 32 is not shown.
As shown in FIGS. 3A to 3C, the draining device 16 includes a distal end member 24, a seal member 26, a proximal end member 28, pressing members 30 a and 30 b, a cover 32, and a connecting member 34. And have.

  The proximal end member 28 is disposed at the distal end of the cobble guard 18 and supports the distal end member 24 rotatably on the y-axis and the z-axis, and supports pressing members 30a and 30b that press the distal end member 24 toward the work roll 20a. Is for.

The base end member 28 has a rectangular parallelepiped shape having a width substantially equal to that of the work roll 20a in the y direction, and a connection member 34 (base end side connection member 34b) at the center in the width direction of the surface facing the front end member 24. Is fixed.
In addition, air cylinders 28a and 28b that respectively support slidable pressing members 30a and 30b, which will be described later, are formed on both ends of the surface on which the connection member 34 is disposed. Compressed air is supplied into the air cylinders 28a and 28b from an air supply means (not shown).

The tip member 24 has a rectangular parallelepiped shape having a width substantially equal to that of the work roll 20a in the y direction. A seal material 26 is disposed on the surface of the tip member 24 facing the peripheral surface of the work roll 20a, and a connection member 34 (tip-side connection member 34a) is fixed at the center of the opposite surface. Yes.
Further, both end portions in the width direction (y direction) of the surface on which the connection member 34 is disposed are pressed toward the work roll 20a by the pressing members 30a and 30b, respectively.

  The sealing material 26 is made of felt or the like, has a width substantially equal to that of the work roll 20a, is disposed on a surface of the tip member 24 facing the peripheral surface of the work roll 20a, and comes into contact with the peripheral surface of the work roll 20a to seal it. By doing so, the coolant sprayed by the coolant supply means 14a onto the work roll 20a is prevented from falling onto the surface of the steel strip S.

In the illustrated example, the surface of the sealing material 26 that contacts the work roll 20a is formed in a concave shape in the width direction (y direction), and only the contact portions 26a at both ends in the width direction are peripheral surfaces of the work roll 20a. The central portion 26b between the two contact portions 26a has a gap with the peripheral surface of the work roll 20a. Further, the width in the y direction of the central portion 26b is formed to be larger than the width of the steel strip S.
Even if the central portion 26b of the sealing material 26 is not in contact with the peripheral surface of the work roll 20a, a water film is formed in the gap due to the rotational motion of the work roll 20a and the viscosity of the cooling liquid, and the cooling liquid is drained. Can do.
Since the coolant drained by the sealing material 26 falls from both ends in the width direction of the sealing material 26, it can be prevented from dropping on the surface of the steel strip S.

  Thus, by forming the central portion of the sealing material 26 in a concave shape, wear due to sliding with the sealing material 26 in the region of the work roll 20a in contact with the steel strip S, or between the sealing material 26 and It is possible to prevent wrinkles due to the biting of foreign matter, and to prevent wrinkles on the steel strip S.

In addition, it is preferable that the clearance gap between the sealing material 26 and the work roll 20a in the center part 26b shall be about 0.5-3 mm.
By setting the gap between the sealing material 26 and the work roll 20a to be 0.5 mm or more, it is possible to reliably prevent foreign matter from being caught. Further, by setting the gap between the sealing material 26 and the work roll 20a to 3 mm or less, a water film can be formed in the gap between the sealing material 26 and the work roll 20a, and the coolant can be drained reliably. .
In the present invention, the shape of the sealing material 26 is not limited to a concave contact surface, and the sealing material 26 may be in contact with the work roll over the entire width direction.

The distal end member 24 is supported by the connecting member 34 so as to be rotatable about the y-axis and the z-axis with respect to the proximal end member 28, and is pressed toward the work roll 20a by the pressing members 30a and 30b. The sealing material 26 arrange | positioned at 24 can contact the surrounding surface of the work roll 20a uniformly, and can drain the coolant reliably.
This will be described in detail later.

The connection member 34 is an arm-like member that connects the proximal end member 28 and the distal end member 24 so as to be rotatable about two axes. Specifically, the connecting member 34 connects the proximal end member 28 and the distal end member 24 around the y axis that is the longitudinal direction of the distal end member 24 (seal member 26), and at the contact point between the seal member 26 and the work roll 20a. It is connected so as to be rotatable around the z axis which is a tangential direction.
The connection member 34 includes a distal end side connection member 34a, a proximal end side connection member 34b, and an intermediate connection member 34c.

  The distal end side connecting member 34a is fixed to the center in the width direction of the surface of the distal end member 24 opposite to the surface facing the work roll 20a. Further, an intermediate connection member 34c is connected to the end of the distal end side connection member 34a opposite to the distal end member 24 so as to be rotatable about the z axis.

  The base end side connection member 34 b is fixed to the center portion in the width direction of the surface of the base end member 28 that faces the tip member 24. An intermediate connection member 34c is connected to the end of the base end side connection member 34b opposite to the base end member 28 so as to be rotatable about the y axis.

  The connecting member 34 is connected so that the tip member 24 rotates in the range of −15 ° to 15 ° around the y axis and in the range of −15 ° to 15 ° around the z axis. It is preferable.

The pressing members 30a and 30b are rod-like members that are slidably disposed in the air cylinders 28a and 28b, respectively, and the distal ends protrude from the air cylinders 28a and 28b and abut against the distal end member 24. Further, the tip portion that contacts the tip member 24 is formed in a hemispherical shape.
The pressing members 30a and 30b arranged in the air cylinders 28a and 28b are pressed against the tip member 24 by compressed air, and press the sealing material 26 arranged on the tip member 24 against the work roll 20a.

In the illustrated example, the tip portions of the pressing members 30a and 30b are formed in a hemispherical shape, but the present invention is not limited to this, and other shapes such as a rectangular shape may be used. By forming, the tip member 24 can be suitably pressed even when the tip member 24 is inclined.
Moreover, it is also preferable to form the front-end | tip part of pressing member 30a, 30b with an elastic body. By forming the tip portion with an elastic body, the tip member 24 can be suitably pressed even when the tip member 24 is inclined.
In the illustrated example, the pressing members 30a and 30b are driven by compressed air. However, the present invention is not limited to this. For example, the pressing members 30a and 30b may be driven by a spring or the position of the pressing member may be a bolt. You may make it adjust with these.

  As described above, in the rolling apparatus, the work roll is cooled by supplying a coolant to the work roll in order to prevent deformation of the work roll and surface roughness due to processing heat generated during rolling of the steel strip. . Also, if this coolant adheres to the surface of the steel strip, the steel strip rusts or burns off in the next step, so a drainer is placed on the work roll to drain the coolant. ing.

FIGS. 6A and 6B are diagrams conceptually showing a conventional rolling apparatus.
As shown in FIG. 6, in the rolling apparatus 100, a draining device 104 that drains the work roll 102 a is disposed at the tip of the cobble guard 106. In addition, in the rolling apparatus 100 shown in FIG. 6, illustration of a cooling liquid supply means, a backup roll, etc. is abbreviate | omitted.
The draining device 104 of the rolling device 100 includes a seal material (front end member) 108 and a base end member 110, and the seal material 108 is slidably disposed on an air cylinder 110 a formed on the base end member 110. Yes. Compressed air is supplied into the air cylinder 110a, and the sealing material 108 is pressed against the work roll 102a to drain water.

Here, as described above, in the rolling apparatus, recombination of the rolling rolls is performed in accordance with the wear of the rolling rolls or in accordance with the product to be produced. There is a need. Therefore, the drainer 104 is disposed on a movable pedestal (the cobble guard 106 in the illustrated example), and the drainer 104 is retracted together with the pedestal when the rolling rolls are recombined.
Since this pedestal (cobble guard 106) needs to be configured to be movable, rattling is likely to occur. Further, in order to bring the sealing material and the work roll into contact with high accuracy and satisfy the sealing performance, high accuracy is required for the position adjustment of the base.

  Therefore, in the conventional rolling apparatus 100, the drainer 104 is inclined in the horizontal direction (rotation around the y-axis) as shown in FIG. ) As shown in FIG. 3, the seal material 108 is inclined in the orthogonal direction (rotation around the z-axis), and the seal material 108 comes into contact with the work roll 102 a, resulting in uneven wear and reducing the life of the seal material. There was a problem that the clearance (gap) of the portion changed and the draining performance (sealability) deteriorated.

On the other hand, the present invention is connected to the tip member 24 including the sealing material 26 and to be rotatable around the axis in the tangential direction (z direction) of the peripheral surface of the work roll 20a at the contact position of the sealing material 26, Since the sealing member 26 is pressed against the work roll 20a by the pressing member 30, as shown in FIG. 4A, even if the draining device 16 is inclined in the orthogonal direction (rotation around the z axis), the tip member 24 However, the seal member 26 and the work roll 20a can be uniformly brought into contact with each other by rotating around the z-axis with respect to the base end member 28.
Further, the distal end member 24 including the sealing material 26 and the proximal end member 28 (pedestal) are connected so as to be rotatable about the extending direction (y direction) axis of the sealing material 26, and the sealing material 26 is pressed by the pressing member 30. Is pressed against the work roll 20a, as shown in FIGS. 4B and 4C, even when the draining device 16 is inclined in the horizontal direction (rotation around the y-axis), the tip member 24 is The seal member 26 can be uniformly brought into contact with the work roll 20a by rotating around the y-axis with respect to the end member 28.

Thus, even if there is a backlash of the pedestal or poor adjustment, it is possible to maintain the positional accuracy of the sealing material 26 and the work roll 20a and to make them contact uniformly, so that the contact of the sealing material 26 is suppressed. Therefore, it is possible to prevent the life reduction due to uneven wear and the occurrence of product defects due to the deterioration of draining performance.
Further, even if the position adjustment accuracy of the pedestal is low, the sealing material 26 and the work roll 20a can be brought into contact with each other with high position accuracy. Can be reduced and the operating rate can be improved.

The cover 32 is for covering the space between the distal end member 24 and the proximal end member 28 including the connecting member 34 and the pressing members 30a and 30b. And falling onto the steel strip S from the gap between the base end member 28 and the base end member 28.
In the illustrated example, the cover 32 is formed in a so-called bellows structure, and even when the distal end member 24 and the proximal end member 28 are relatively moved (rotated), the cover 32 is located between the distal end member 24 and the proximal end member 28. The gap can be suitably covered. The shape of the cover 32 is not limited to the bellows structure, and various shapes can be used as long as the coolant can be prevented from dropping from the gap between the distal end member 24 and the proximal end member 28.

Here, in the illustrated example, the connecting member 34 is configured to connect the distal end member 24 and the proximal end member 28 at the center in the width direction, but the present invention is not limited to this, and the width direction The structure which connects at an edge part may be sufficient.
Further, although the connecting member 34 is an arm that can rotate about two axes, the present invention is not limited to this, and the distal end member 24 and the proximal end member 28 are at least about the y axis and about the z axis. What is necessary is just to connect to one side so that rotation is possible.

Fig. 5 (A) is a view showing another example of the draining device used in the rolling device of the present invention, and Fig. 5 (B) is a cross-sectional view taken along the line D-D of (A).
Since the draining device 50 shown in FIG. 5 has the same configuration as the draining device 16 except that it has connection members 52 and 54 instead of the connection member 34, the same parts are denoted by the same reference numerals, and The explanation is mainly given for different parts.

The draining device 50 includes a distal end member 24, a sealing material 26, a proximal end member 28, pressing members 30 a and 30 b, and connection members 52 and 54.
The connecting member 52 connects the distal end member 24 and the proximal end member 28 so as to be able to translate in the x direction and to rotate about the z axis. The connection member 52 includes a distal end side connection member 52a and a proximal end side connection member 52b.

  The distal end side connection member 52a is a plate-like member that is fixed to the central portion in the width direction of the surface of the distal end member 24 on the proximal end member 28 side. In addition, the base end side connection member 52b is a guide member that is fixed to the center portion in the width direction of the base end member 28 and guides the front end side connection member 52a so as to be movable in the x direction with the z direction. In the illustrated example, the proximal end side connection member 52b guides the distal end side connection member 52a to be movable in the x direction by a slide roller.

  The connecting member 54 has the same configuration as that of the connecting member 52 except that the connecting member 54 is disposed at both end portions in the width direction. The distal end side connecting member 54a, which is a plate-like member, is connected to the proximal end side connecting member. The guide 54b is interposed so as to be movable in the x direction.

Thus, even if the draining device 50 is inclined in the orthogonal direction (rotation around the z-axis) by connecting in parallel to the x-direction and being rotatable about the z-axis, the tip member 24 can rotate about the z-axis with respect to the base end member 28 to uniformly contact the sealing material 26 and the work roll 20a, and the position of the draining device 50 in the x direction is shifted. Even so, the tip member 24 can translate in the x direction, and the sealing material 26 and the work roll 20a can be suitably brought into contact with each other.
Thereby, even when there is a backlash of the pedestal or poor adjustment, the positional accuracy of the sealing material 26 and the work roll 20a can be maintained and evenly contacted, so that the contact of the sealing material 26 is suppressed. It is possible to reduce the life due to uneven wear and to prevent the occurrence of product defects due to the deterioration of drainage performance.
Further, even if the position adjustment accuracy of the pedestal is low, the sealing material 26 and the work roll 20a can be brought into contact with each other with high position accuracy. Can be reduced and the operating rate can be improved.

The rolling device of the present invention may be any device that rotatably connects the distal end member 24 and the proximal end member 28 of the draining device 16 around at least one of the y axis and the z axis. It is preferable to be able to rotate at least around the z axis.
When the tip member 24 is tilted about the y-axis, the sealing material 26 may be partly worn and unevenly worn, but the clearance between the work roll 20a and the sealing material 26 is maintained, so that the draining performance deteriorates immediately. There is no.
On the other hand, when the tip member 24 is tilted about the z-axis, the clearance between the work roll 20a and the sealing material 26 changes in addition to the left and right uneven wear, so a draining failure occurs immediately and a product failure occurs. Resulting in. Therefore, by making it possible to rotate at least around the z-axis, the clearance between the work roll 20a and the sealing material 26 can be maintained, and defective draining can be prevented.

Further, it is preferable that the distal end member 24 and the proximal end member 28 are connected so as to be movable in the x direction. When the distal end member 24 and the proximal end member 28 do not translate in the x direction, the position of the work roll 20a and the sealing material 26 is adjusted by moving the cobble guard 18. Therefore, it is necessary to finely adjust the position of the cobble guard 18.
On the other hand, by connecting the distal end member 24 and the proximal end member 28 so as to be movable in the x direction, the pressing member 30 moves the distal end member 24 in the x direction so that the sealing material 26 is moved to the work roll 20a. The position of the work roll 20a and the sealing material 26 can be adjusted by pressing. Therefore, it is not necessary to adjust the position of the cobble guard 18 with high accuracy, and the adjustment can be facilitated.

  In the illustrated example, the coolant supply means 14a and 14b for supplying coolant to the work roll are provided. However, in addition to this, a coolant supply means for cooling the backup roll may be provided. Or you may have a means to supply lubricating oil (rolling oil) to a rolling roll.

Next, the operation of the rolling device 10 will be described.
The steel strip S that has been subjected to the predetermined treatment is conveyed to the rolling device 10 and rolled between the work rolls 20a and 20b.
The work rolls 20a and 20b being rolled are cooled by being sprayed with a cooling liquid from the cooling liquid supply means 14a and 14b, respectively.
Moreover, the sealing material 26 of the draining device 16 disposed on the cobble guard 18 contacts the work roll 20a, and drains the coolant supplied to the work roll 20a.

  Here, since the sealing material 26 (tip member) of the drainer 16 is supported so as to be rotatable about the y-axis and the z-axis, the base of the drainer 16 has a backlash or poor adjustment. Even so, the positional accuracy between the sealing material 26 and the work roll 20a can be maintained, and the sealing can be ensured. Thereby, since a cooling liquid does not fall on the surface of the steel strip S, it does not rust and an uneven burning does not generate | occur | produce in the next annealing process.

Next, the effect | action at the time of the recombination of a rolling roll in the rolling apparatus 10 is demonstrated.
First, the cobble guard 18 is retracted together with the draining device 16 while the rolling is stopped.
After the cobble guard 18 is retracted, the rolling roll is recombined, the cobble guard 18 is moved again to the vicinity of the work roll 20a, and the sealing material 26 of the draining device 16 is brought into contact with the work roll 20a.
Compressed air is supplied to the air cylinders 28a, 28b of the base end member 28 of the draining device 16, the pressing members 30a, 30b are pressed against the tip member 24, and the sealing material 26 disposed on the tip member 24 is applied to the work roll 20a. Press.

Here, since the sealing material 26 (tip member) of the drainer 16 is supported so as to be rotatable about the y-axis and the z-axis, the pedestal (cobble guard 18) of the drainer 16 is rattled and poorly adjusted. Even if there is, the positional accuracy between the sealing material 26 and the work roll 20a can be maintained, and the sealing can be surely performed.
Further, since the sealing material 26 and the work roll 20a can be brought into uniform contact with each other without adjusting the position of the pedestal (cobble guard 18) with high accuracy, the time for adjusting the position of the pedestal can be reduced. , Reduce downtime and improve uptime.

Hereinafter, the present invention will be described in more detail with reference to specific examples of the present invention.
[Example 1]
The steel strip S was processed using the rolling apparatus 10 shown in FIG.

The steel strip S was a tin plate, the rolling reduction was 24 to 32%, the thickness after rolling was 0.16 to 0.60 mm, and the plate width was 650 to 1100 mm.
The line speed was 500-2100 mpm, and 1100 km / day of processing was performed for one month.

Further, an emulsion containing 3% rolling oil was used as the cooling liquid.
The amount of cooling liquid supplied by the cooling liquid supply means 14a and 14b was set to 1000 L / min.
Further, the tip member 24 was connected so as to rotate within a range of ± 15 ° about the y-axis and to rotate within a range of ± 15 ° about the z-axis.
Further, the width of the work roll 20a is 1400 mm,
The width of the sealing material 26 was 1400 mm, the width of the central portion 26b of the sealing material 26 was 1280 mm, and the gap between the sealing material 26 and the work roll 20a at the central portion 26b of the sealing material 26 was 0.8 mm.
Further, the material of the contact portion 26a of the sealing material 26 was polyamideimide (Torlon (registered trademark)).

When the appearance of the steel strip S after treatment was visually evaluated, the cut-off amount due to poor draining was 3 T / month. (The defective rate was 0.006%.)
Moreover, the lifetime by abrasion of the contact part 26b of the sealing material 26 was 14 days.

[Comparative Example 1]
As Comparative Example 1, using the rolling apparatus shown in FIG. 6, the treatment was performed in the same manner as in Example 1 except for the configuration of the drainer, and the appearance was evaluated.
As a result of evaluation, the amount cut off due to poor draining was 30 T / month. (The defective rate was 0.06%.)
Moreover, the lifetime by abrasion of the contact part 26b of the sealing material 26 was 7 days.

As described above, as can be seen from Example 1 and Comparative Example 1, the rolling device of the present invention can uniformly bring the sealing material 26 and the work roll 20a into contact with each other. It can be seen that the amount of truncation due to defects can be reduced.
In addition, since the contact between the sealing material 26 and the work roll 20a can be prevented, uneven wear of the contact portion 26b of the sealing material 26 can be reduced, and the life of the sealing material 26 can be extended. I understand.

  As mentioned above, although the rolling apparatus of this invention was demonstrated in detail, this invention is not limited to the above-mentioned example, Of course, in the range which does not deviate from the summary of this invention, various improvement and a change may be performed. It is.

DESCRIPTION OF SYMBOLS 10 Rolling device 12 Stand 14a, 14b Coolant supply means 16, 50 Draining device 18 Cobble guard 20a, 20b Work roll 22a, 22b Backup roll 24 Tip member 26 Sealing material 26a Contact part 26b Center part 28 Base end member 28a, 28b Air Cylinder 30a, 30b Pushing member 32 Cover 34, 52, 54 Connection member 34a, 52a, 54a Tip side connection member 34b, 52b, 54b Base end side connection member 34c Intermediate connection member S Steel strip

Claims (6)

A rolling mill that rolls a steel strip transported along a predetermined transport path with a work roll, a cooling means for supplying a coolant to the peripheral surface of the work roll, and a water drainer in contact with a predetermined portion of the peripheral surface of the work roll. In a rolling apparatus comprising a drainer that performs
The draining device extends in the width direction of the work roll, and has a tip member provided with a sealing material that contacts the peripheral surface of the work roll;
A proximal member that supports the distal member;
A pressing member provided on the base end member, and pressing the tip member against a peripheral surface of the work roll;
The distal end member is rotatable with respect to the base end member about an axis in the extending direction of the sealing material and an axis in a tangential direction of the peripheral surface of the work roll at the contact position of the sealing material. It is supported in,
The surface of the sealing material that contacts the peripheral surface of the work roll has a concave shape in which both end portions in the width direction are in contact with the peripheral surface and the central portion has a gap between the peripheral surface. Rolling equipment to do. The rolling device according to claim 1 , wherein the pressing members are provided on both end sides in the longitudinal direction of the sealing material. The rolling device according to claim 1 or 2 , wherein a tip of the pressing member on the tip member side is formed in a curved surface. The tip member, the relative proximal member, according to the work either of the peripheral surface of the claims 1 to 3 which is movably supported parallel to the normal direction roll at the contact position of the sealing material Rolling equipment. The rolling device according to any one of claims 1 to 4 , wherein the draining device is movably provided so as to be separated from the work roll. Between the proximal member and the distal end member, the connection portion between the distal member and the proximal member, and, according to any one of claims 1 to 5 provided a cover for covering a space including the pressing member Rolling equipment.

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