JP3769877B2 - Draining device for rolling rolls - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a draining device for a rolling roll.
[0002]
[Prior art]
In general, a rolling roll rises in temperature due to processing heat during rolling or heat conduction from the material to be rolled, and adversely affects the roll crown or roll surface. Cooling is in progress.
[0003]
Furthermore, for the purpose of reducing the rolling load during rolling, oil-lubricated rolling is performed in which the friction coefficient between the rolling roll and the material to be rolled is reduced by oil lubrication.
At this time, when the steel strip is hot-rolled, if the cooling liquid adheres to the steel strip, the rolling resistance increases due to the temperature drop of the steel strip, and the rolling power increases and the rolling roll surface is adversely affected. Moreover, in cold rolling, when a cooling liquid adheres to a steel strip, there exist problems, such as rusting and a burning nonuniformity generate | occur | produces at the next annealing process.
[0004]
Further, Oite the hot rolling, but the oil lubrication rolling is carried out by injecting the lubricating oil into the rolling roll in the rolling mill inlet side, when the ejection rolling rolls the coolant is attached, efficiency Good lubrication effect is not obtained.
[0005]
For this reason, conventionally, a draining head of the draining device is installed on the steel strip side from the coolant injection position, and the elastic sealing material of the draining head is sealed by contacting the outer peripheral surface of the roll, and cooled. The liquid is prevented from adhering to the steel strip to be rolled.
[0006]
In particular, on the entry side of the rolling mill, the lubricating oil is placed on the downstream side (steel strip side) of the rolling oil spray header for lubrication rolling by fixing the rolling oil spray header to the downstream side in the roll rotation direction (steel strip side). It prevents the lubrication effect from decreasing due to mixing with cooling water.
[0007]
An example of the conventional drainer is described in Japanese Patent Application Laid-Open No. 8-215719.
In this conventional draining device, a draining head is fixed to the tip of a support frame that can be pivoted up and down. The draining head extends along the axis of the rolling roll, and a tubular bag body made of rubber or the like extending along the axis of the rolling roll is stored in a storage box whose surface on the side of the rolling roll is opened. Furthermore, an elastic sealing material is arranged on the front side (rolling roll side) of the bag body. The elastic sealing material is stored in the storage box in a state where the rear part can be advanced and retracted, and the front part is exposed from the storage box to the rolling roll side. This elastic sealing material also extends along the axis of the rolling roll.
[0008]
Then, when the bag body is expanded by applying a predetermined fluid pressure to the bag body, the bag body pushes the elastic sealing material toward the rolling roll, and the tip of the elastic sealing material is moved to the fluid pressure. Is brought into contact with the outer peripheral surface of the roll with a pressure according to the above. At this time, due to the elastic deformation of the entire elastic sealing material, the elastic sealing material tip is pressed with a pressure that is easily deformed according to the shape of the outer peripheral surface of the roll.
[0009]
As a result, the conventional drainer is expected to obtain a substantially uniform sealing effect in the entire roll axial direction.
Further, by rotating the support frame, the position of the draining head is adjusted according to the diameter of the rolling roll.
[0010]
[Problems to be solved by the invention]
In the above draining device, the tube-like bag body extending in the rolling roll axial direction is inflated to press the elastic sealing material against the rolling roll. There is a tendency that the central portion swells larger than both ends in the present direction.
[0011]
For this reason, the elastic sealing material pushed out by the bag body is bent so that the central portion in the extending direction (the central portion in the roll axis direction) protrudes, and the tip portion of the elastic sealing material is relatively strong in the central portion in the roll axial direction. It will contact | abut to a roll outer peripheral surface. As a result, the tip of the elastic seal material becomes difficult to follow the wear of the roll and the crown, and only the wear of the central portion of the elastic seal material proceeds first, thereby shortening the life of the elastic seal material. is there.
[0012]
Further, when a plurality of bags are juxtaposed in the advancing and retreating direction of the elastic sealing material in order to increase the amount of extrusion by the bag and the extrusion pressure, the above tendency is further promoted.
[0013]
Further, as described above, when lubricating rolling is performed by injecting lubricating oil toward the rolling roll on the rolling mill entrance side, if the pressing force of the elastic sealing material differs depending on the roll axial direction position, In the portion where the pressing force is weak, the draining effect becomes weak, and there is a problem that the effect of lubrication rolling cannot be obtained efficiently.
[0014]
On the other hand, on the entrance side of the rolling mill, as described above, when the draining head of the draining device and the rolling oil spray header are independent from each other and the position of the rolling oil spray header is fixed, the change of the rolling roll diameter is changed. When the draining head is rotated up and down following this, there are the following inconveniences.
[0015]
When the rolling roll diameter is increased, the tip of the draining head is displaced downward, so that the draining head 50 and the rolling oil 52 injected from the rolling oil nozzle 51 interfere with each other as shown in FIG. The injected rolling oil 52 may not reach the rolling roll 53 sufficiently. In FIG. 11, D is an interference position.
[0016]
Further, when the diameter of the rolling roll 53 is reduced, the position of the rolling oil spray header 54 is fixed, so that a part of the rolling oil 52 injected from the rolling oil nozzle 51 is partly shown in FIG. There is a possibility that it does not adhere to the rolling roll 53. In FIG. 12, E is a part which does not adhere to the roll of rolling oil.
[0017]
In order to avoid such a problem, conventionally, it is conceivable that the position of the rolling oil nozzle 51 is brought out toward the rolling roll 53 so that the injected rolling oil 52 does not interfere with the draining head 50. There is a problem that the distance between the rolling oil nozzle 51 and the rolling roll 53 is reduced, the spraying area is narrowed, and a portion where the rolling oil is not sprayed is generated on the surface of the rolling roll 53.
[0018]
In addition, it is conceivable to increase the vertical distance between the draining head 50 and the rolling oil spray header 54, but these facilities are installed on the entry side of the rolling roll 53. However, there was a limit, and such measures were difficult.
[0019]
The present invention has been made by paying attention to the above-described problems, and provides a draining device capable of making the contact pressure along the roll axis direction of an elastic sealing material pressed against a rolling roll uniform. Is the first issue.
[0020]
Moreover, even if the tip position of the draining head fluctuates due to a change in the rolling roll diameter, it is a second object to provide a draining apparatus capable of appropriately attaching rolling oil to the rolling roll.
[0021]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the draining device for rolling rolls according to claim 1 of the present invention includes an elastic sealing material extending along the axial direction of the rolling roll and expanding the elastic sealing material by expanding the elastic sealing material. In a rolling roll draining device comprising a pressing means having an inflatable / shrinkable bag body that can be pressed against the outer peripheral surface of the roll, the bag bodies are arranged in a plurality of rows in parallel with the roll axis direction. The bag body closest to the elastic seal material among the bag bodies is divided into a plurality along the roll axis direction, and each bag body closest to the elastic seal material and the closest row Each bag body in a row adjacent to each other is characterized in that the central positions of the respective bag bodies in the roll axis direction are offset from each other when viewed from the elastic sealing material side .
[0022]
According to the present invention, since the bag body is divided into a plurality along the roll axis direction, at least two or more central portions of each bag body are arranged along the roll axis direction, so that the outer circumferential surface of the roll The contact pressure along the roll axis direction at the front end portion of the elastic sealing material in contact with is uniformized.
[0024]
Also, each bag bodies columns adjacent in forward and backward direction of the elastic sealing material, as viewed from the elastic sealing material side, because the mutually is offset central portion position of the roll axis direction of each bag, the elastic seal It will be in the state where the location where the mutual expansion | swelling amount between each adjacent bag body in the advancing / retreating direction of a material is small, and a small location complement each other. As a result, the contact pressure along the roll axis direction at the tip of the elastic sealing material that contacts the outer peripheral surface of the roll is further uniformized.
[0025]
Next, the invention described in claim 2 is characterized in that, with respect to the configuration described in claim 1, a rolling oil spray header for ejecting rolling oil to the rolling roll is supported by the movable part of the draining device. It is what.
[0026]
In the present invention, the rolling oil spray header is automatically moved following the movement of the draining head by spraying from the rolling oil nozzle by supporting the rolling oil spray header on the movable part of the draining device, for example, the draining head. The rolled oil reaches the rolling roll without interfering with the draining head.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram showing the overall configuration of the present embodiment.
[0028]
Reference numeral 1 denotes a work roll (rolling roll). On the entry side of the work roll 1, a roll cooling header 2, a draining head 4 of a draining device 3, and a rolling oil spray header 5 are installed. Reference numeral 2a denotes a cooling nozzle for the roll cooling header. Symbol S is a material to be rolled.
[0029]
The draining head 4 is supported at the tip of the support frame 6. The support frame 6 can be rotated up and down around a rotation shaft 7 parallel to the roll axis, and a positioning cylinder 8 serving as an actuator is connected to the rear portion of the support frame 6. When the positioning cylinder 8 is actuated, the support frame 6 is rotated around the rotation shaft 7 and the position of the draining head 4 is adjusted.
[0030]
Here, reference numeral 9 is an air pressure source for supplying air pressure for operation, reference numerals 10 and 11 are air pressure supply lines, reference numeral 12 is a solenoid valve for operating the cylinder for operating the positioning cylinder 8, and reference numeral 13 is a pressure adjusting valve. ing.
[0031]
As shown in FIG. 2, which is a conceptual diagram viewed from above, the draining head 4 includes a storage box 14, a plurality of bag bodies 15 to 17, and an elastic seal material 18.
The storage box 14 is a box that extends along the roll axis direction P and has an open surface on the work roll 1 side, and is fixed to the upper surface of the tip of the support frame 6. In the storage box 14, a plurality of bag bodies 15 to 17 and an elastic sealing material 18 are stored.
[0032]
The bag bodies 15 to 17 are juxtaposed in two rows along the advancing / retreating direction Q of the elastic sealing material 18. Each bag 15-17 has a tube shape extending along the roll axis direction P, and has a predetermined elastic force by being made of rubber or the like.
[0033]
Of the bags 15 to 17 arranged in the advancing / retreating direction Q of the elastic sealing material 18, the first row of bags on the elastic sealing material 18 side is divided into two along the roll axis direction P, that is, two bags 15. , 16. As a result, when viewed from the side of the elastic sealing material 18 (upper side in FIG. 2), the two bag bodies 15, 16 near the elastic sealing material 18, the roll axial direction P center portions F1, F2 of the bag body 16 and The roll axis direction P center portion F3 of the body is offset from each other.
[0034]
The three bags 15 to 17 are connected to the air pressure source 9 via a pilot operation electromagnetic valve 19 and a pressure regulating valve 13, and can be expanded by air pressure from the air pressure source 9.
[0035]
Further, the elastic sealing material 18 extends in the roll axial direction P in a state where the tip end portion 18a is exposed to the work roll 1 side. Although not shown, a stopper mechanism is provided to prevent the elastic sealing material 18 from being detached from the storage box 14.
[0036]
A rolling oil spray header 5 is supported by a support frame 30 below the tip of the support frame 6, and the rolling oil nozzle 5 a of the rolling oil spray header 5 is formed on the outer peripheral surface 1 a of the work roll 1. I'm here.
[0037]
Next, the operation of the above apparatus will be described.
When the piston rod 8a of the positioning cylinder 8 is extended by operating the cylinder operation solenoid valve 12, the support frame 6 is rotated upward, and the tip 18a of the elastic seal material 18 is in a position where it contacts the surface of the roll 1. Stop. At this time, the air pressure supplied to the positioning cylinder 8 pressurizes the pilot operation electromagnetic valve 19 via the pilot air pressure supply line 21 so that the pilot operation electromagnetic valve 19 is in communication with the air pressure source 9. The air pressure of the air pressure source 9 is supplied to the bags 15 to 17 through the air pressure supply line 11.
[0038]
As a result, each of the bags 15 to 17 in the storage box 14 expands as shown in FIG. 2, and the elastic sealing material 18 advances to the work roll 1 side by the pressure due to the expansion, and the outer periphery of the work roll 1. Pressed against the surface 1a.
[0039]
When the bag bodies 15 to 17 are inflated, each of the bag bodies 15 to 17 expands the center portions F1 to F3 in the roll axial direction P to the greatest extent, but the two bag bodies in a row close to the elastic sealing material 18. Since 15 and 16 are arranged along the roll axis direction P, positions D1 and D2 that swell the most are two places along the roll axis direction P. Furthermore, each roll axial direction P center part F1, F2 of the two bag bodies 15 and 16 of the row | line | column near the elastic sealing material 18 and roll axial direction P center part F3 of the bag body 17 of the 2nd row are elastic. Since they are offset from each other when viewed from the sealing material 18 side, the smaller bulge portions of the first-row bag bodies 15 and 16 are pressed more in the vicinity of the largest bulge portion D3 of the second-row bag bodies 17. become.
[0040]
That is, between the bags 15, 16, and 17 arranged in the advancing / retreating direction Q of the elastic sealing material 18, the portions where the mutual expansion amount is large and the small portions complement each other and are given to the elastic sealing material 18. The pressure along the roll axis direction P becomes uniform.
[0041]
Thereby, it is avoided that only a part of the front end portion 18a of the elastic seal material 18 along the roll axial direction P is in strong contact with the outer peripheral surface 1a as in the prior art.
That is, the tip 18a of the elastic sealing material 18 is deformed into a shape that follows the wear of the work roll 1 and the crown, and the degree of adhesion to the work roll 1 is improved. Further, the end contact of the tip end portion 18a is avoided, and as a result, variation in the amount of wear along the roll axis direction P of the tip end portion of the elastic seal material 18 is reduced, and the life of the elastic seal material 18 is improved.
[0042]
Here, in the above embodiment, the case where the first row of bags is separated into two has been described as an example, but may be separated into three or more.
Moreover, although the said embodiment demonstrated the example which has arrange | positioned the bag body in multiple rows along the advance / retreat direction Q of the elastic sealing material 18, it is not limited to this. For example, as shown in FIG. 3, a plurality of separated bags 25 may be arranged in only one row, or as shown in FIG. 4, three or more bags 26 may be arranged.
[0043]
As shown in FIG. 4, even when the bags 26 are arranged in three or more rows, for each bag adjacent to each other in the advancing and retreating direction Q of the elastic sealing material 18, as viewed from the elastic sealing material 18 side, By smoothing, that is, offsetting, the central position of each bag body in the roll axis direction P, the large and small portions of the adjacent bag bodies in the advancing and retreating direction Q of the elastic sealing material 18 are complemented. I will be together.
[0044]
In addition, when each row of bags is divided into a plurality of pieces along the roll axis direction P, as shown in FIG. As shown in the first row, the divided bags may be communicated with each other. Further, the communication between the bag bodies may be such that not only the same row but also the bag bodies in different rows communicate with each other.
[0045]
Moreover, although the said embodiment demonstrated the case where a bag body was expanded with an air pressure, you may make it expand each bag body with another fluid pressure.
Moreover, in order to make the contact pressure in the roll axial direction P with respect to the work roll 1 in the elastic sealing material 18 more uniform, the rigidity of the 18 rear side of the elastic sealing material may be set high. In this case, even if there is local pressing from the bag body, the bending of the elastic sealing material 18 along the roll axis direction is reduced.
[0046]
When the roll 1 is stopped, that is, when the draining device 3 is stopped, if the piston rod 8a of the positioning cylinder 8 is moved backward by operating the cylinder operation solenoid valve 12, the air pressure in the extension air supply line is zero. Thus, the pilot operation electromagnetic valve 19 is switched to the discharge side, and the air in the bag is exhausted and the bag is contracted.
[0047]
Further, the draining head 4 is pivotally displaced up and down around the rotation shaft 7 according to the diameter of the target work roll 1. In this embodiment, the rolling oil spray header 5 is a movable part of the draining device 3. Since it is supported by a support frame 30 different from a certain support frame 6, if the roll diameter changes greatly, the rolling oil may not adhere to the work roll 1 in its entirety. Therefore, as shown in FIG. 5, it is preferable to support the rolling oil spray header 5 on the support frame 6.
[0048]
For example, even if the roll diameter increases and the draining head 4 is positioned below, the rolling oil sprayed from the rolling oil nozzle 5a does not interfere with the draining head 4 as shown in FIG. The injected rolling oil 27 surely reaches the surface of the work roll 1. When the diameter of the roll is reduced and the draining head 4 is rotated upward, as shown in FIG. 7, the shaft of the rolling oil nozzle 5a is also rotated slightly upward accordingly, whereby the rolling oil nozzle 5a. The rolling oil 27 sprayed from is securely attached to the surface of the roll 1.
[0049]
Furthermore, in this embodiment, the rolling oil spray header 5 is supported by the movable part of the draining device 3 so that the actuator for the rolling oil spray header 5 for changing the position of the rolling oil nozzle 5a to an appropriate position is provided. do not need.
[0050]
Further, since it is not necessary to consider the interference between the draining head 4 and the rolling oil spray header 5, the space occupied by the rolling oil spray header 5 can be small.
The drainage device for the upper work roll on the entrance side of the rolling mill has been described above as an example. In this case, each apparatus shown in FIG. 1 is arranged symmetrically with respect to the material S to be rolled.
[0051]
Moreover, the draining device of this invention which concerns on Claim 1 and Claim 2 when not having a rolling mill spray header is applicable also to the draining device by the side of a rolling mill.
[0052]
【Example】
Actually, when the linear pressure applied to the elastic sealing material 18 from the bag body in the draining device 3 in the above embodiment was obtained, the result shown in FIG. 8 was obtained.
[0053]
In Figure 8, A represents a linear pressure distribution of the present embodiment, B is, for comparison, a conventional case of a line pressure distribution of pressing the elastic sealing material 18 in the bag of one like. As can be seen from FIG. 8, the variation in the linear pressure along the roll axis direction P is reduced to about 1/10 compared to the conventional case.
[0054]
Similarly, in the conventional draining device, the amount of wear at the tip of the elastic sealing material 18 after use for the period until the elastic sealing material reaches the end of its life was obtained, and as shown in FIG.
[0055]
In Figure 9, A shows the wear amount distribution of this embodiment, B is, for comparison, a wear amount distribution of pressing the elastic sealing material 18 in the bag of one as in the conventional case. As can be seen from FIG. 9, it is understood that the variation in the amount of wear at the tip of the elastic sealing material 18 is also improved.
[0056]
Further, when the degree of adhesion between the pressed elastic sealing material 18 and the work roll 1 outer peripheral surface 1a when a new elastic sealing material having no wear was used was obtained, the result shown in FIG. 10 was obtained. .
[0057]
In Figure 10, A shows the degree of adhesion distribution of this embodiment, B is, for comparison, is the conventional way the elastic sealing member 18 in the bag of single and adhesion distribution of pressing the case. It can be seen from FIG. 10 that the degree of adhesion to the work roll 1 is also greatly improved.
[0058]
【The invention's effect】
As described above, in the draining device of the present invention, the variation in the contact pressure of the elastic seal material front end along the roll axial direction with respect to the outer peripheral surface of the rolling roll is reduced. There is an effect that the adhesion to the rolling roll is improved and the life of the elastic sealing material is also improved.
[0059]
As a result, the draining effect of the draining device is improved and the draining effect can be maintained for a long period of time, so that the effect of oil lubrication rolling can be efficiently exhibited.
Moreover, when the invention of claim 2 is adopted, there is an effect that the interference between the draining device and the injected rolling oil is surely avoided and the injected rolling oil reaches the surface of the rolling roll.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of an apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing a configuration of a draining head according to an embodiment of the present invention.
FIG. 3 is a schematic diagram showing a configuration of another draining head according to the embodiment of the present invention.
FIG. 4 is a schematic view showing a configuration of another draining head according to the embodiment of the present invention.
FIG. 5 is a view showing positions of a draining head and a rolling oil spray header according to the embodiment of the present invention.
FIG. 6 is a diagram showing the positions of the draining head and the rolling oil spray header when the roll diameter is large according to the embodiment of the present invention.
FIG. 7 is a diagram showing the positions of the draining head and the rolling oil spray header when the roll diameter is small according to the embodiment of the present invention.
FIG. 8 is a diagram showing a linear pressure distribution in the roll width direction according to an example of the present invention.
FIG. 9 is a diagram showing a wear amount distribution in the roll width direction according to an embodiment of the present invention.
FIG. 10 is a diagram showing a gap distribution with a work roll in the roll width direction according to an embodiment of the present invention.
FIG. 11 is a diagram for explaining inconvenience when the roll diameter is increased in the related art.
FIG. 12 is a diagram for explaining inconvenience when the roll diameter in the related art is reduced.
[Explanation of symbols]
P Roll axis direction 1 Work roll (rolling roll)
3 Draining device 4 Draining head 5 Rolled oil spray header 6 Support frame (movable part)
14 Storage box 15-17 Bag 18 Elastic sealing material

Claims (2)

For a rolling roll comprising: an elastic sealing material extending along the axial direction of the rolling roll; and a pressing means having an inflatable / shrinkable bag body that allows the elastic sealing material to be pressed against the outer peripheral surface of the roll by expanding. In the drainer,
The bag body is arranged in a plurality of rows in parallel with the roll axis direction, and the bag body in a row closest to the elastic sealing material among the plurality of rows of bag bodies is divided into a plurality along the roll axis direction, Furthermore, each bag body in the row closest to the elastic seal material and each bag body in the row adjacent to the closest row are located at the center position in the roll axis direction of each bag body as viewed from the elastic seal material side. Characterized in that they are offset from each other. The draining device for rolling rolls according to claim 1, wherein a rolling oil spray header for jetting rolling oil to the rolling rolls is supported by a movable part of the draining device.

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