JP4751092B2 - Rolling mill and rolling method - Google Patents

Description

  The present invention relates to a rolling mill and a rolling method provided with a wiper device that removes foreign matters adhering to the surface of a rolled material.

  In general, in a rolling mill, work rolls and rolled material are constantly heated by frictional heat and processing heat generated during rolling. When the temperature of the work roll and the rolled material is increased, not only the rolling accuracy is lowered, but also the rolling material and the work roll are seized, and the surface quality of the product may be lowered. For this reason, in order to prevent an excessive temperature rise of the work roll and the rolled material, the coolant is sprayed and supplied to the surfaces of the work roll and the rolled material to perform cooling and lubrication.

  The rolled material rolled by the rolling mill is finally wound up in a coil shape. However, if the coolant remains attached to the surface of the rolled material, the rolled material slips during winding and is unwound in the axial direction. (Telescopic) occurs and operational stability is impaired. Further, in the annealing process in the subsequent process, gloss unevenness and rust are generated, and the surface quality of the rolled material is significantly impaired.

  In order to prevent such problems, a wiper device for removing deposits such as coolant from the surface of the rolled material is provided on the exit side of the rolling mill, and a conventional wiper device equipped with such a wiper device is provided. Such rolling mills are disclosed in Patent Documents 1 and 2, for example.

Japanese Patent Laid-Open No. 5-293531 Japanese Patent Laid-Open No. 10-146611

  However, in Patent Document 1, it is necessary to supply lubricating oil to a plurality of short backup roll bearings that support the wiper roll, and in order to prevent scattering of the lubricating oil, the lubricating oil is applied to each bearing. It must be collected, resulting in complicated equipment. Further, during high speed rolling, a small bearing is subjected to a high load and the life is shortened, resulting in an increase in running cost and a decrease in productivity. Furthermore, the removed coolant adheres to the wiper roll surface outside the sheet width and scatters to the downstream side in the rolling direction due to the centrifugal force of the rotation, so that the scattered coolant may reattach to the surface of the rolled material. is there. And, the deflection of the wiper roll is corrected by the pressing device provided at both ends, but since the diameter of the wiper roll is small, the pressing is limited to the vicinity of the plate end, There is no uniformity of pressing force. As a result, the coolant removal effect becomes non-uniform in the sheet width direction of the rolled material, while undulation occurs in the length direction.

  In Patent Document 2, after passing the wiper roll, air is injected in the width direction of the rolled material, and air is sucked from both side edges, so the introduction cost of the vacuum suction device for sucking air is reduced. It will take. In addition, by providing such a vacuum suction device, the reversible rolling mill increases the distance to the winding device that winds the rolled material, and increases the unrolled length and the distance to various measuring instruments. The yield will be reduced. Furthermore, as in Patent Document 1, the scattered coolant may be reattached to the surface of the rolled material.

  Accordingly, the present invention solves the above-described problem, and can provide a rolling mill and a rolling method that can prevent deformation by uniformizing the pressing force in the sheet width direction of the rolled material and perform uniform wiping in the sheet width direction. The purpose is to provide.

The rolling mill according to the first invention for solving the above-mentioned problems is as follows.
A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
Wiping the rolled material, and a first wiper roll comprising a hollow upper and lower subjected to crowning,
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
Wiping the rolled material, and a second wiper roll comprising a hollow upper and lower subjected to crowning,
And an air injection device that injects air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll.

A rolling mill according to a second invention that solves the above problems is as follows.
In the rolling mill according to the first invention,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
And a structural support that supports the shaft end support member so as to be movable in the vertical direction.

A rolling mill according to a third invention for solving the above-described problem is
A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
A first wiper roll consisting of a pair of upper and lower hollows that wipes the rolled material and is flattened;
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
A second wiper roll consisting of a pair of upper and lower hollows wiping the rolled material and flattened;
An air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll;
Furthermore,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
A structural support that supports the shaft end support member so as to be movable in the vertical direction;
The first wiper roll and the second wiper roll are arranged so that upper and lower roll axes cross each other in the sheet width direction and are arranged so as to cross in the same direction.

A rolling mill according to a fourth invention for solving the above-mentioned problem is as follows.
A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
A first wiper roll consisting of a pair of upper and lower hollows that wipes the rolled material and is flattened;
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
A second wiper roll consisting of a pair of upper and lower hollows wiping the rolled material and flattened;
An air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll;
Furthermore,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
A structural support that supports the shaft end support member so as to be movable in the vertical direction;
The first wiper roll and the second wiper roll are arranged so that the upper and lower roll axes cross each other with respect to the plate width direction, and are arranged so as to cross in the opposite direction.

A rolling mill according to a fifth invention for solving the above-described problem is
In the rolling mill according to the third or fourth invention,
A cross angle setting mechanism for setting a cross angle according to the plate width of the rolled material is provided.

A rolling mill according to a sixth invention for solving the above-described problems is as follows.
In the rolling mill according to the second invention,
The first wiper roll to which the shaft end support member is attached and the second wiper roll to which the shaft end support member is attached are installed interchangeably.

The rolling method according to the seventh invention for solving the above-mentioned problems is as follows.
In the rolling method of removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling,
Wiping the rolled material with a first wiper roll consisting of a hollow upper and lower pair subjected to crowning ,
By collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, and discharging it to the outside in the width direction of the rolled material, Preventing splashing of coolant and reattachment to the rolled material ,
Wiping the rolled material further with a second wiper roll consisting of a hollow upper and lower pair subjected to crowning,
The coolant discharged from the vicinity of the end of the rolled material to be wiped by the second wiper roll is removed by jetting air from the downstream side in the rolling direction.

The rolling method according to the eighth invention for solving the above problems is as follows:
In the rolling method of removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling,
Wiping the rolled material with a first wiper roll consisting of a pair of upper and lower hollow processed flat,
By collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, and discharging it to the outside in the width direction of the rolled material, Preventing splashing of coolant and reattachment to the rolled material,
Further wiping the rolled material with a second wiper roll consisting of a pair of upper and lower hollow processed flat,
Removing the coolant discharged from the vicinity of the end of the rolled material to be wiped by the second wiper roll by injecting air from the downstream side in the rolling direction;
The first wiper roll and the second wiper roll are arranged such that upper and lower roll axes cross each other in the sheet width direction.

According to the rolling machine which concerns on 1st invention, the coolant apparatus which supplies the coolant for cooling and lubricating the work roll which consists of a pair of upper and lower sides which rolls a rolling material, and the said rolling material and the said work roll, The said rolling in the rolling mill and a wiper device for removing said coolant adhering to timber, the wiper device, the rolling direction upstream side, and wiping the rolled material, and, first a hollow of upper and lower subjected to crowning One wiper roll and a pair of upper and lower first wiper rolls that are opposed to each other and formed in a plate shape, collect the coolant scattered by the rotation of the first wiper roll, and discharge it to the outside in the width direction of the rolled material by, wiping and shielding plate, the rolled material to prevent re-adhesion of the scattering and the rolled material of the coolant, and, Krag A second wiper roll consisting of a pair of hollow upper and lower parts subjected to a bending process, and an air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll. By providing, the pressing force of the rolled material in the sheet width direction can be made uniform to prevent deformation, and uniform wiping can be performed in the sheet width direction.

  According to the rolling mill which concerns on 2nd invention, in the rolling mill which concerns on 1st invention, the shaft end support member which each supports the shaft end of the said 1st wiper roll and the said 2nd wiper roll, and the said shaft end support By providing a structural support that supports the member so as to be movable in the vertical direction, it is possible to improve the maintainability of the wiper roll such as centering and roll recombination and to reinforce the strength.

According to the rolling mill which concerns on 3rd invention, the coolant apparatus which supplies the coolant for cooling and lubricating the work roll which consists of a pair of upper and lower sides which rolls a rolling material, and the said rolling material and the said work roll, The said rolling In the rolling mill provided with a wiper device that removes the coolant adhered to the material, the wiper device comprises a pair of hollow upper and lower parts that are wiped from the upstream side in the rolling direction and flattened. One wiper roll and a pair of upper and lower first wiper rolls that are opposed to each other and formed in a plate shape, collect the coolant scattered by the rotation of the first wiper roll, and discharge it to the outside in the width direction of the rolled material A shielding plate for preventing the coolant from splashing and reattaching to the rolled material, wiping the rolled material, A second wiper roll consisting of a pair of hollow upper and lower surfaces, and an air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll, The first wiper roll and the second wiper roll further include shaft end support members that respectively support the shaft ends of the first wiper roll, and a structure support that supports the shaft end support member so as to be movable in the vertical direction. The wiper roll and the second wiper roll are arranged so that the upper and lower roll axes cross each other in the sheet width direction, and arranged in the same direction so as to cross the sheet width direction of the rolled material. The pressing force is made uniform to prevent deformation, and uniform wiping can be performed in the plate width direction.

According to the rolling machine which concerns on 4th invention, the coolant apparatus which supplies the coolant for cooling and lubricating the work roll which consists of a pair of upper and lower sides which rolls a rolling material, and the said rolling material and the said work roll, The said rolling In the rolling mill provided with a wiper device that removes the coolant adhered to the material, the wiper device comprises a pair of hollow upper and lower parts that are wiped from the upstream side in the rolling direction and flattened. One wiper roll and a pair of upper and lower first wiper rolls that are opposed to each other and formed in a plate shape, collect the coolant scattered by the rotation of the first wiper roll, and discharge it to the outside in the width direction of the rolled material A shielding plate for preventing the coolant from splashing and reattaching to the rolled material, wiping the rolled material, A second wiper roll consisting of a pair of hollow upper and lower surfaces, and an air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll, The first wiper roll and the second wiper roll further include shaft end support members that respectively support the shaft ends of the first wiper roll, and a structure support that supports the shaft end support member so as to be movable in the vertical direction. The wiper roll and the second wiper roll are arranged so that the upper and lower roll axes cross each other with respect to the sheet width direction, and are arranged so as to cross in the opposite direction, thereby stably transporting the rolled material. Can be made.

  According to the rolling mill which concerns on 5th invention, in the rolling mill which concerns on 3rd or 4th invention, by providing the cross angle setting mechanism which sets a cross angle according to the plate | board width of the said rolling material, a cross angle is set. It can be easily changed.

  According to the rolling mill which concerns on 6th invention, in the rolling mill which concerns on 2nd invention, the said 1st wiper roll which attached the said shaft end support member, and the said 2nd wiper roll which attached the said shaft end support member Are interchangeable and installed, so that maintainability can be improved.

According to the rolling method according to the seventh aspect of the present invention, in the rolling method for removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling, the hollow upper and lower pair subjected to crowning are used. Wiping the rolled material with the first wiper roll, and collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, By discharging the rolled material to the outside in the width direction, the coolant is prevented from being scattered and reattached to the rolled material, and the rolled material is further wiped by a second wiper roll consisting of a hollow upper and lower pair subjected to crowning. And the coolant discharged from the vicinity of the end of the rolled material wiped by the second wiper roll is lowered in the rolling direction. By removing by jetting air from the side, the uniformly the pressing force of the plate width direction of the rolled material to prevent deformation, it is possible to perform uniform wiping in a plate width direction.

According to the rolling method according to the eighth aspect of the present invention, in the rolling method of removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling, from the pair of hollow upper and lower parts subjected to flat processing Wiping the rolled material with the first wiper roll, and collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, By discharging to the outside in the width direction of the rolled material, scattering of the coolant and reattachment to the rolled material are prevented, and the rolled material is further wiped by a second wiper roll consisting of a hollow upper and lower pair subjected to flat processing. And the coolant discharged from the vicinity of the end portion of the rolled material wiped by the second wiper roll from the downstream side in the rolling direction. Injecting earth is removed, said first wiper roll and said second wiper rolls, by placing such a roll axes of the upper and lower with respect to the plate width direction to cross each other, the plate width direction of the rolled material The pressing force can be made uniform to prevent deformation, and uniform wiping can be performed in the plate width direction.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a schematic view of a rolling mill according to an embodiment of the present invention, FIG. 2 is a schematic view of a wiper device, FIG. 3 is a cross-sectional view of a wiper roll subjected to crowning, and FIG. 4 shows a support structure of the wiper roll. FIG. 5 is a cross-sectional view of the wiper roll subjected to flat processing, FIG. 6 is a diagram illustrating the surface pressure between the wiper roll subjected to crowning and the wiper roll subjected to flat processing during rolling, FIG. Is a cross layout diagram of a wiper roll subjected to flat processing in another wiper device, FIG. 8 is a top view of FIG. 7, FIG. 9 is another cross layout diagram of a wiper roll subjected to flat processing in another wiper device, FIG. 10 is a top view of FIG. 9, and FIG. 11 shows the surface pressure between the wiper roll subjected to crowning during rolling and the wiper roll having a cross arrangement subjected to flat processing. FIG. 12 is a schematic view of a rolling mill according to another embodiment of the present invention. In addition, the arrow in a figure has shown the rolling direction.

  As shown in FIG. 1, the tandem rolling mill 1 includes a front rolling stand 2, a rear rolling stand 3, a coolant header 4, and a wiper device 5. The rolling stands 2 and 3 have the same configuration. The rolling stand 2 includes work rolls 6a and 6b for rolling the rolling material S, intermediate rolls 7a and 7b for supporting the work rolls 6a and 6b, Reinforcing rolls 8a and 8b for supporting the rolls 7a and 7b are provided. Similarly, the rolling stand 3 supports work rolls 9a and 9b for rolling the rolled material S and the work rolls 9a and 9b. Intermediate rolls 10a and 10b and reinforcing rolls 11a and 11b that support the intermediate rolls 10a and 10b are provided.

The coolant header 4 has a configuration in which a plurality of nozzles (not shown) are arranged in the width direction of the rolled material S, and is provided on the upstream and downstream sides of the work rolls 6a, 6b, 9a, 9b in the rolling direction. The coolant C (water or oil or a mixture of water and oil) C for cooling and lubricating the rolled material S and the work rolls 6a, 6b, 9a and 9b is injected.

  As shown in FIG. 2, the wiper device 5 is provided on the downstream side of the rear stand 3 in the rolling direction, and removes deposits such as coolant C adhering to the surface of the rolled material S. The wiper device 5 includes first wiper rolls 12a and 12b, a pair of upper and lower shielding plates 13a and 13b, second wiper rolls 14a and 14b, and air injection devices 15a and 15b. It has been.

  As shown in FIG. 3, the wiper rolls 12a, 12b, 14a, 14b are thin hollow and crowned, and the outer diameter of the central portion in the axial direction is thick and narrows toward the end. Has been. And as shown in FIG. 4, wiper roll 12a, 12b, 14a, 14b is provided so that the rolling material S may be pinched | interposed from an up-down direction, and both ends of 1st wiper roll 12a, 12b are shaft end support members 16a, Both ends of the second wiper rolls 14a and 14b are rotatably supported by shaft end support members 17a and 17b. That is, the wiper rolls 12a, 12b, 14a, and 14b are rotated by the rolled material S.

  As shown in FIG. 4, the wiper device 5 is provided with a housing 18, and a structural support 19 is supported at the approximate center in the rolling direction. The shaft end support members 16a and 16b are supported so as to be movable in the vertical direction between the inner surface of the housing 18 on the upstream side in the rolling direction and the structural support body 19, and the shaft end support members 17a and 17b are supported in the rolling direction of the housing 18. It is supported so as to be movable in the vertical direction between the inner surface on the downstream side and the structural support 19. The shaft end support members 16a, 16b, 17a, and 17b are formed in substantially the same shape, and the shaft end support member 16a and the shaft end support member 17a, and the shaft end support member 16b and the shaft end support member 17b are interchanged. It is possible to move independently.

  Further, as shown in FIG. 2, the upper shielding plate 13a is supported between the first wiper roll 12a and the second wiper roll 14a above the substantially center of the wiper device 5 (housing 18) in the rolling direction. In the lower part, the groove 20 is extended in the plate width direction (the axial direction of the wiper rolls 12a and 12b). This groove portion 20 is generally longer than the maximum sheet width of the rolled material S, and may be installed at the barrel length of the first wiper rolls 12a and 12b. On the other hand, the lower shielding plate 13b is supported between the first wiper roll 12b and the second wiper roll 14b below the substantially center of the wiper device 5 (housing 18) in the rolling direction. The air injection devices 15a and 15b have a configuration in which a plurality of nozzles (not shown) are arranged in the width direction of the rolled material S, and rolling is performed from above and below on the downstream side of the second wiper rolls 14a and 14b in the rolling direction. Air A is sprayed onto the material S and the second wiper rolls 14a and 14b to remove deposits such as the coolant C adhering to the surfaces of the rolled material S and the second wiper rolls 14a and 14b.

  Next, the rolled material S that has passed through the wiper device 5 is conveyed to a winding device (not shown) and wound into a coil shape.

  Accordingly, the conveyed rolled material S is rolled to a predetermined thickness by adjusting the rolling force and bending force between the rotating work rolls 6a and 6b and between the work rolls 9a and 9b. At this time, the work rolls 6a, 6b, 9a, and 9a are always corrected for roll deflection by a group of rolls such as intermediate rolls 7a, 7b, 10a, and 10b and reinforcing rolls 8a, 8b, 11a, and 11b supported from behind. ing. In addition, the form of the roll group supported from the back in the present embodiment described above is not limited to this, and is supported by a plurality of roll groups supported in the vertical direction or by a plurality of multi-stage roll groups arranged in a cluster. It doesn't matter if you do it.

Further, during rolling, frictional heat and work heat are generated between the rolled material S and the work rolls 6a, 6b or the work rolls 9a, 9a, and the rolled material S and the work rolls 6a, 6b, 9a, 9a. However, the coolant C can be cooled and lubricated by injecting the coolant C from the coolant header 4. The configuration of the coolant header 4 may be a single-row configuration or a multi-row configuration, and its supply method is a zone coolant method in which a plurality of nozzles are simultaneously turned on / off, a spot coolant method in which each nozzle is turned on / off, or the like. There may be. Furthermore, in the coolant at the time of high-speed rolling that exceeds per minute 1000 meters, since a high cooling performance is required, but a mixture of water and oil are used, the mixing ratio of oil to water at this time For example, it is about 3 to 5%, but is not limited to this value.

  Then, the rolled material S, onto which the coolant C sprayed during rolling is adhered, is transported to the wiper device and wiped by being sandwiched between the first wiper rolls 12a and 12b and the second wiper rolls 14a and 14b. Then, the coolant C is removed.

  Here, in a general rolling line, if it is a tandem type rolling mill 1, before and after passing the welding point between the preceding rolled material and the following rolled material, and if it is a reverse type rolling machine 24 described later, rolling is performed. It is well known that acceleration or deceleration is involved at the front and rear end portions of the material. Therefore, when the weight of the wiper roll itself having no rotational driving force is increased, there is a possibility that the acceleration / deceleration of the rolled material cannot be followed by the inertial force of the wiper roll. Thereby, a speed difference arises between both, and a wiper roll will slip. When the slip occurs, the rolled material is rubbed, resulting in deterioration of the rolled material quality and yield, and the basic performance as a wiper device is not satisfied.

  Therefore, in the present invention, by providing the first wiper rolls 12a and 12b and the second wiper rolls 14a and 14b formed in a hollow shape, the inertial force is reduced and slipping is prevented, thereby reducing the quality of the rolled material S. It is possible to prevent a decrease and a decrease in yield, and to cope with high-speed rolling.

  In the conventional rolling mill, the wiper roll obtains the rotational driving force from the rolled material, and the wiper roll also obtains the rotational driving force from the wiper roll. For this reason, the backup roll slips without being able to follow the acceleration / deceleration of the rolled material, and both rolls are rubbed and scratched. As a result, it is transferred to the rolled material, leading to a reduction in the quality of the rolled material. In order to prevent the slip between the backup roll and the wiper roll, it is conceivable to lower the acceleration / deceleration rate, but this leads to a decrease in productivity and is not a good idea.

  Therefore, in the present invention, by not using the backup roll, it is possible to avoid the problems of an increase in running cost due to a decrease in the bearing life of the backup roll and complication of equipment due to the installation of the bearing oil supply mechanism. Furthermore, the yield is improved, the equipment introduction cost and the running cost can be reduced, and the maintainability can be improved.

As described above, the wiper rolls 12a, 12b, 14a, 14b are supported by the shaft end support members 16a, 16b, 17a, 17b at both ends thereof. Therefore, the wiper roll subjected to flat processing as shown in FIG. 5 (a wiper roll 21a to be described later, 21b, 22a, 22b) simply providing the pressing force to the rolled material S, that is, the rolled material S and the first The surface pressure between the wiper rolls 12a and 12b or the second wiper rolls 14a and 14b becomes non-uniform, and the shape of the rolled material S may be disturbed. Further, the wiping property in the plate width direction is non-uniform.

  Here, FIG. 6 is used to compare the surface pressure between the wiper roll subjected to the crowning process in the width direction of the rolled material and the wiper roll subjected to the flat process. In FIG. 6, the surface pressure of the wiper roll subjected to crowning is indicated by a solid line, and the surface pressure of the wiper roll subjected to flat processing is indicated by a dashed line.

  As shown in FIG. 6, in the wiper roll subjected to the flat processing, it is understood that the surface pressure is low at the center portion of the plate width and the surface pressure is increased toward the end portion of the plate. That is, at a low surface pressure, the ability to remove the coolant is reduced (large amount of residual oil). On the contrary, at a high surface pressure, the wiping performance is excessively increased and the shape of the rolled material is disturbed. On the other hand, in the wiper roll subjected to the crowning process, a portion having a slightly high surface pressure exists in the vicinity of the plate end portion, but a substantially smooth and constant surface pressure can be applied throughout the entire width of the plate. As a result, the coolant removal capability becomes substantially uniform in the width direction of the rolled material, maintains the shape rolled by the work roll, and does not cause abnormal plate shape disturbance. FIG. 6 also shows the surface pressure distribution at the time of changing the sheet width of the rolled material. When the sheet width is changed, in the wiper roll subjected to flat processing, the surface pressure distribution in the sheet width direction is shown. Is uneven. On the other hand, in the wiper roll subjected to the crowning process, even if the plate width is changed, the surface pressure distribution in the plate width direction hardly changes, and a substantially constant surface pressure can be applied.

  Thus, by providing the wiper rolls 12a, 12b, 14a, 14b subjected to the crowning process, a substantially constant surface pressure can be applied in the sheet width direction without depending on the sheet width of the rolled material S. The coolant removal capability can also be formed uniformly in the plate width direction. In addition, since the shape of the rolled material S can be maintained, the occurrence of waves and scratches in the longitudinal direction of the rolled material S can be prevented.

  In the coolant removal method, first, the coolant C formed in a thick layer on the surface of the rolled material S is removed by the first wiper rolls 12a and 12b. The coolant C adhering to the surface of the rolled material S is caused to flow outward in the width direction of the rolled material S or upstream in the rolled material direction by wiping the first wiper rolls 12a and 12b. The coolant C that has flowed out of the sheet width falls as it is below the rolled material S, or is placed on the surface of the gap between the first wiper roll 12a and the first wiper roll 12b outside the sheet width and taken out downstream in the rolling direction. It is. At this time, since the first wiper rolls 12a and 12b are rotated as the rolled material S is conveyed, the coolant C is scattered by the centrifugal force.

  The upper and lower shielding plates 13a and 13b are provided so that the scattered coolant C does not adhere to the surface of the rolled material S again, and the upper shielding plate 13a and the lower shielding plate 13b have different structures. The upper shielding plate 13a is formed in a plate shape, and a groove portion 20 that collects the coolant C scattered upward and discharges it toward the outer side in the width direction of the rolled material S is provided at the end portion. On the other hand, the lower shielding plate 13b is formed in a plate shape, and collects the coolant C scattered downward and discharges it toward the outer side or the lower side of the rolled material S in the width direction.

In this way, by preventing re-adhesion of the coolant S to the rolled material S after passing through the first wiper rolls 12a and 12b, it adheres to the surface of the rolled material S during conveyance to the second wiper rolls 14a and 14b . The film thickness of the coolant S can be made as thin as possible. Thereby, the coolant removal load of the 2nd wiper rolls 14a and 14b can be reduced.

  Thereafter, the coolant C remaining thinly on the surface of the rolled material S is further removed by wiping the second wiper rolls 14a and 14b. The second wiper rolls 14a and 14b are preferably of the same specifications as the first wiper rolls 12a and 12b in view of maintainability. Further, the coolant S removed to the outside in the width direction of the rolled material S by wiping the second wiper rolls 14a and 14b falls below the second wiper rolls 14a and 14b outside the plate width, or the second wiper roll. It adheres to the surface of 14a, 14b, and is taken out to the rolling direction downstream with the rotation. Here, the total amount of the coolant C taken out per rotation is very small compared to the amount taken out by the first wiper rolls 12a and 12b, and the coolant C is scattered when the second rolls 14a and 14b are wiped. There is nothing.

However, as the rolling progresses, the removed coolant C adheres to the surfaces of the second wiper rolls 14a and 14b one after another. Therefore, air A is injected from the downstream side in the rolling direction to the vicinity of both ends of the rolled material S of the second wiper rolls 14a and 14b by the air injection devices 15a and 15b , and deposited on the surfaces of the second wiper rolls 14a and 14b. The coolant C is blown away from the rolled material S and the second wiper rolls 14a and 14b. Since the amount of the coolant C adhering to the surfaces of the second wiper rolls 14a and 14b is very small, it is not necessary to recover the air A containing the coolant C after being blown off.

  In a conventional rolling mill, a blower device for supplying air between the first wiper roll and the second wiper roll in the entire width direction of the rolled material, a device for sucking the supplied air, and a vacuum suction source However, in the present invention, by providing the upper and lower shielding plates 13a and 13b for preventing re-adhesion of the scattered coolant C, the coolant removal performance can be maintained and the equipment cost can be reduced.

  In addition, the shaft end portions of the wiper rolls 12a, 12b, 14a, and 14b are independently supported by the shaft end support members 16a, 16b, 17a, and 17b, thereby improving the maintainability such as the centering of the rolls and the roll changing operation. Is done. Further, since the strength of the housing 18 can be reinforced by the structural support 19, it is possible to contribute to the thinning of the housing 18.

  Since the wiper device 5 can be made compact with a small number of parts by configuring as described above, the initial cost and the running cost can be reduced. Moreover, since the distance from the rolling mill 1 to the winding device can be shortened by making the wiper device 5 compact, the yield can be improved, and the plate thickness disposed on the exit side of the work rolls 6a, 6b or the work rolls 9a, 9b. Since the distance to the meter and the shape detector can be shortened, the rolling accuracy can be improved.

  Next, the case where the 1st wiper roll 21a, 21b and the 2nd wiper roll 22a, 22b which performed the flat process shown in FIG. 5 is provided is demonstrated.

  As shown in FIGS. 7 and 8, the wiper device 23 includes first wiper rolls 21a and 21b, a pair of upper and lower shielding plates 13a and 13b, and second wiper rolls 22a and 22b made of a pair of upper and lower sides from the upstream side in the rolling direction. And air injection devices 15a and 15b are provided. The wiper rolls 21a, 21b, 22a, and 22b are thin hollow and flat. The first wiper rolls 21a and 21b and the second wiper rolls 22a and 22b are arranged such that the upper and lower roll axes cross each other in the plate width direction, and the first wiper rolls 21a and 21b and the second wiper rolls 21a and 22b are arranged. A pair of upper and lower wiper rolls 22a and 22b are arranged in a cross at a predetermined cross angle in the same direction.

  Here, using FIG. 11, the surface pressures of the wiper roll subjected to the crowning process in the width direction of the rolled material and the wiper roll having the cross arrangement subjected to the flat process are compared. In FIG. 11, the surface pressure of the wiper roll subjected to the crowning process is indicated by a solid line, and the surface pressure of the wiper roll having a cross arrangement subjected to the flat process is indicated by an alternate long and short dash line.

  As shown in FIG. 6, when the flat wiper roll is arranged without crossing, the surface pressure in the plate width direction is non-uniform. However, as shown in FIG. By arranging the wiper rolls in a cross arrangement, a surface pressure distribution substantially equivalent to that of the wiper roll subjected to crowning can be obtained. This can achieve the same effect even when the plate width of the rolled material is changed.

  Moreover, as shown in FIGS. 9 and 10, the cross arrangement direction of the first wiper rolls 21a and 21b and the second wiper rolls 22a and 22b may be arranged in the opposite direction. In the case of cross arrangement, the rolling direction and the rotation direction of each roll are shifted by the cross angle, and there is a concern about twisting of the rolled material S. Moment is balanced on the upper surface side of the rolled material S in contact with the wiper roll 21a and the second wiper roll 22a, the lower surface side of the rolled material S in contact with the first wiper roll 21a and the second wiper roll 22b, and all the upper and lower surfaces. Therefore, the rolling material S can be conveyed more stably.

  Therefore, even if the wiper rolls 21a, 21b, 22a, and 22b that are flatly processed and arranged in a cross manner are provided, a substantially constant surface pressure is applied in the plate width direction without depending on the plate width of the rolled material S. The coolant removal capability can also be formed uniformly in the plate width direction. In addition, since the shape of the rolled material S can be maintained, the occurrence of waves and scratches in the longitudinal direction of the rolled material S can be prevented.

  Further, the wiper rolls 21a, 21b, 22a, 22b are independently supported by shaft end support members 16a, 16b, 17a, 17b as shown in FIG. 4, and a cross angle setting mechanism (not shown) that can set a plurality of cross angles. The cross angle can be easily changed by supporting with. Note that when the plate width of the rolled material S is wide, the cross angle is controlled to be large, and when the plate width is small, the cross angle is controlled to be small. Therefore, maintainability such as centering of each roll and roll recombination operation when the cross arrangement is changed can be improved.

  The same effect can be obtained even if the wiper rolls 12a, 12b, 14a, 14b subjected to crowning are arranged in a cross manner. Further, when one of the wiper rolls 12a and 12b is crowned and the other is flattened, and / or when either one of the wiper rolls 14a and 14b is crowned and the other flattened The same effect can be obtained also in.

  Moreover, when using non-metallic rolls, such as a nonwoven fabric roll, for the 1st wiper rolls 12a and 12b, when either one of a crowning process or cloth arrangement | positioning is provided to at least 2nd wiper rolls 14a and 14b, the same A wiping effect can be obtained. Even when a crowning roll is used, as described above, one of the second wiper rolls 14a and 14b may be crowned and the other may be flat.

  In the present embodiment, the tandem rolling mill 1 has been described, but the present invention can also be applied to a reverse rolling mill 24 as shown in FIG.

  As shown in FIG. 12, in the rolling mill 24, the coolant header 4 is provided on both sides of the rolling stand 2, the wiper device 5 is provided on both sides thereof, and the winding device 25 is provided on both sides thereof. In the reverse type rolling mill 24, the rolling direction changes for each pass, and the rolling material S is taken up by the take-up device 25 on the entry / exit side in each pass. Therefore, it is necessary to arrange the wiper device 5 on the entry / exit side. In this case, the wiper device 5 arranged on the entry side in each path direction of the rolled material S is used to prevent the backflow of the coolant C supplied on the entry side while holding the rolled material S in the vertical direction. On the other hand, the wiper device 5 arranged on the outlet side can obtain the same effects as described above.

  Therefore, according to the rolling mill which concerns on this invention, work roll 6a, 6b and work roll 9a, 9b which consist of a pair of upper and lower sides which roll the rolling material S, rolling material S, work roll 6a, 6b, and work roll 9a, 9b. In a rolling mill 1 that includes a coolant header 4 that supplies a coolant C for cooling and lubricating and a wiper device 5 that removes the coolant C adhering to the rolled material S, the wiper device 5 is from the upstream side in the rolling direction. The first wiper rolls 12a and 12b, which are a pair of upper and lower hollows wiping the rolled material S and subjected to crowning processing, and upper and lower shielding plates 13a and 13b for preventing the coolant C from scattering and reattaching to the rolled material S And second wiper rolls 14a and 14b made of a pair of upper and lower hollows wiping the rolled material S and subjected to crowning, Even if the sheet width of the rolled material is changed by providing air injection devices 15a and 15b for injecting air A from the downstream side in the rolling direction to the vicinity of the end portion of the rolled material S to be wiped by the iper rolls 14a and 14b. Since a uniform pressing force can be applied in the plate width direction and undulation in the length direction can be suppressed, uniform wiping can be performed in the plate width direction. Further, since the wiper rolls 12a, 12b, 14a, 14b do not slip to the rolled material S during high-speed rolling and also in the acceleration / deceleration region of the rolling speed, scratches can be suppressed. Furthermore, since the wiper device 5 is made compact, the initial cost and the running cost can be reduced, and the distance to each detector and the winding device can be shortened, so that the rolling accuracy is improved and the yield is improved. Can be improved.

  Further, shaft end support members 16a and 16b and shaft end support members 17a and 17b for supporting shaft ends of the first wiper rolls 12a and 12b and the second wiper rolls 14a and 14b, respectively, and shaft end support members 16a, 16b and 17a. , 17b and a structure support 19 that supports the wiper rolls 12a, 12b, 14a, and 14b so as to be movable in the vertical direction. Strength can be reinforced.

  Also, the first wiper rolls 21a and 21b and the second wiper rolls 22a and 22b that have been subjected to flat processing are arranged with the upper and lower roll axes crossing each other with respect to the plate width direction and arranged in the same direction. Accordingly, the pressing force of the rolled material S in the sheet width direction can be made uniform to prevent deformation, and uniform wiping can be performed in the sheet width direction.

  Moreover, the rolling material S can be conveyed stably by crossing and arrange | positioning the 1st wiper roll 21a, 21b and the 2nd wiper roll 22a, 22b in the reverse direction.

  In addition, the cross angle can be easily changed by providing a cross angle setting mechanism that sets the cross angle according to the plate width of the rolled material S.

  Further, the shaft end support members 16a and 17a are interchangeable at the shaft ends of the first wiper rolls 12a and 21a and the second wiper rolls 14a and 22a, and the shaft end support members 16b and 17b are interchangeable with the first wiper roll. The shaft ends of 12b and 21b and the second wiper rolls 14b and 22b are interchangeable. From this, when the recombination cycle of the wiper roll is different between the first wiper roll and the second wiper roll, the standby roll can be set to one set. In addition, maintainability can be improved even during normal times.

  It is applicable to a rolling mill equipped with a wiper device.

It is the schematic of the rolling mill which concerns on one Example of this invention. It is the schematic of a wiper apparatus. It is sectional drawing of the wiper roll which gave the crowning process. It is the schematic which showed the support structure of the wiper roll. It is sectional drawing of the wiper roll which gave the flat process. It is the figure which showed the surface pressure of the wiper roll which gave the crowning process at the time of rolling, and the wiper roll which gave the flat process. It is a cross arrangement figure of the wiper roll which performed flat processing in other wiper devices. FIG. 8 is a top view of FIG. 7. It is the other cross arrangement figure of the wiper roll which performed flat processing in other wiper devices. FIG. 10 is a top view of FIG. 9. It is the figure which showed the surface pressure of the wiper roll which gave the crowning process at the time of rolling, and the wiper roll of the cross arrangement | positioning which gave the flat process. It is the schematic of the rolling mill which concerns on the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,24 Rolling mill 2,3 Rolling stand 4 Coolant header 5,23 Wiper apparatus 6a, 6b, 9a, 9b Work roll 7a, 7b, 10a, 10b Intermediate roll 8a, 8b, 11a, 11b Reinforcement roll 12a, 12b, 21a , 21b First wiper rolls 13a, 13b Shield plates 14a, 14b, 22a, 22b Second wiper rolls 15a, 15b Air injection devices 16a, 16b, 17a, 17b Shaft end support member 18 Housing 19 Support structure 20 Groove 25 Winding apparatus

Claims (8)

A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
A first wiper roll consisting of a pair of upper and lower hollows wiping the rolled material and subjected to crowning;
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
A second wiper roll comprising a pair of upper and lower hollows wiping the rolled material and subjected to crowning;
A rolling mill comprising: an air injection device that injects air from the downstream side in the rolling direction to the vicinity of an end of the rolled material that is wiped by the second wiper roll. In the rolling mill according to claim 1,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
A rolling mill comprising: a structural support that supports the shaft end support member so as to be movable in the vertical direction. A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
A first wiper roll consisting of a pair of upper and lower hollows that wipes the rolled material and is flattened;
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
A second wiper roll consisting of a pair of upper and lower hollows wiping the rolled material and flattened;
An air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll;
Furthermore,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
A structural support that supports the shaft end support member so as to be movable in the vertical direction;
The rolling machine characterized in that the first wiper roll and the second wiper roll are arranged so that the upper and lower roll axes cross each other in the sheet width direction and cross in the same direction. A work roll consisting of a pair of upper and lower parts for rolling the rolled material;
A coolant device for supplying a coolant for cooling and lubricating the rolled material and the work roll;
In a rolling mill provided with a wiper device that removes the coolant adhered to the rolled material,
From the upstream in the rolling direction, the wiper device
A first wiper roll consisting of a pair of upper and lower hollows that wipes the rolled material and is flattened;
By facing the first pair of upper and lower wiper rolls and being formed in a plate shape, collecting the coolant scattered by the rotation of the first wiper roll, and discharging it to the outside in the width direction of the rolled material, A shielding plate for preventing splashing of coolant and reattachment to the rolled material;
A second wiper roll consisting of a pair of upper and lower hollows wiping the rolled material and flattened;
An air injection device for injecting air from the downstream side in the rolling direction to the vicinity of the end of the rolled material to be wiped by the second wiper roll;
Furthermore,
Shaft end support members that respectively support shaft ends of the first wiper roll and the second wiper roll;
A structural support that supports the shaft end support member so as to be movable in the vertical direction;
A rolling mill characterized in that the first wiper roll and the second wiper roll are arranged so that the upper and lower roll axes cross each other with respect to the sheet width direction and cross in the opposite direction. In the rolling mill according to claim 3 or 4,
A rolling mill comprising a cross angle setting mechanism for setting a cross angle according to a plate width of the rolled material. In the rolling mill according to claim 2,
The rolling machine, wherein the first wiper roll to which the shaft end support member is attached and the second wiper roll to which the shaft end support member is attached are installed interchangeably. In the rolling method of removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling,
Wiping the rolled material with a first wiper roll consisting of a hollow upper and lower pair subjected to crowning,
By collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, and discharging it to the outside in the width direction of the rolled material, Preventing splashing of coolant and reattachment to the rolled material,
Wiping the rolled material further with a second wiper roll consisting of a hollow upper and lower pair subjected to crowning,
The rolling method characterized by removing the coolant discharged from the vicinity of the end of the rolled material wiped by the second wiper roll by injecting air from the downstream side in the rolling direction. In the rolling method of removing the coolant adhered to the rolled material after supplying the coolant for cooling and lubrication during rolling,
Wiping the rolled material with a first wiper roll consisting of a pair of upper and lower hollow processed flat,
By collecting the coolant scattered by the rotation of the first wiper roll by a plate-shaped shielding plate facing the pair of upper and lower first wiper rolls, and discharging it to the outside in the width direction of the rolled material, Preventing splashing of coolant and reattachment to the rolled material,
Further wiping the rolled material with a second wiper roll consisting of a pair of upper and lower hollow processed flat,
Removing the coolant discharged from the vicinity of the end of the rolled material to be wiped by the second wiper roll by injecting air from the downstream side in the rolling direction;
The rolling method, wherein the first wiper roll and the second wiper roll are arranged such that upper and lower roll axes cross each other in the sheet width direction.

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