WO2018110946A1 - Rolling facility and rolling method - Google Patents

Abstract

The present invention relates to a rolling facility and a rolling method. According to the present invention, the rolling facility comprises: a roughing mill having a roughing mill roll for pressing a material to be transferred; a finishing mill having a finishing mill roll, which is provided on a material transfer path, and pressing the material having passed through the roughing mill; a wiper device provided at a feed-in side of the finishing mill roll, polishing the surface of the finishing mill roll, and supplying cooling fluid to the material; and a cooling device provided on the material transfer path and cooling the material having passed through the finishing mill, wherein the wiper device can include a plurality of cooling header units for supplying the cooling fluid to the material at different positions.

Description

Rolling Equipment and Rolling Method

The present invention relates to a rolling equipment and a rolling method.

1 schematically shows a hot rolling process for producing a hot rolled steel sheet. In the hot rolling process, the slab that has passed through the heating furnace 10 is transferred to the roughing mill 20 by the transfer roll 5 to be rough-rolled, followed by finishing rolling in the finishing mill 30. After cooling in the run out table 40, the coil may be wound in a coil form in the winding device 50.

At this time, in the rough rolling apparatus 20, the slab moved in the heating furnace 10 is primarily rolled in the form of a steel sheet, and in the finishing rolling apparatus 30, the first rolled steel sheet is rolled to the final target thickness.

By the way, since the work roll used in such a hot rolling process makes repeated contact with a hot slab or steel plate, the heat input from a hot slab or steel plate must be considered.

When the work roll is exposed to high temperature for a long time, it is in thermal fatigue. On the surface of the steel sheet in contact with the work roll, high-strength scales such as hematite and magnetite are generated. Causes partial or complete peeling. As such, peeling black skin on the surface of the rolling roll generates fusiform scales and sand scales on the surface of the product, thereby degrading the quality of the product.

Therefore, in the hot rolling process, the thermal fatigue phenomenon of the work roll should be suppressed, and the temperature of the work roll should be properly managed, but in order to properly manage the temperature of the work roll, a method of spraying cooling water on the work roll may be used.

However, since a problem in which a large amount of coolant is concentrated in a work roll specific region may occur depending on a distance from the nozzle for spraying coolant to the work roll, the position at which the coolant is sprayed should be very carefully controlled.

In addition, cooling only the work roll repeatedly contacting the hot steel sheet may cause a decrease in the cooling efficiency.

An object of the present invention is to prevent damage to the work roll pressurizing the raw material in the hot rolling process, and to improve the quality of the rolled product.

In addition, it is an object to prevent rapid cooling before the raw material is introduced into the work roll, and to increase the cooling efficiency of the work roll and the raw material.

In addition, it is an object to increase the efficiency and productivity of the rolling process.

The present invention relates to a rolling equipment and a rolling method.

Rolling equipment according to the present invention comprises a rough rolling device having a rough rolling roll for pressing the material to be conveyed; and a finishing rolling roll for pressing the material passed through the rough rolling device provided in the transport path of the material; A wiper device provided at an inlet side of the finishing rolling roll to polish the surface of the finishing rolling roll, and supply a cooling fluid to the material; And a cooling device provided in the transport path of the material to cool the material passing through the finishing rolling device, wherein the wiper device comprises: a plurality of cooling header units for supplying a cooling fluid to the material at different locations; It may include.

Preferably, the wiper device, the device frame disposed to follow the finishing rolling roll in the material traveling direction; and a wiper member provided on the device frame; And the largest amount of cooling fluid provided at the apparatus frame or the wiper member and spaced farthest from the finishing rolling roll, and supplying the smallest amount of cooling fluid at the position closest to the finishing rolling roll. Cooling header unit; may include.

More preferably, the wiper device is connected to the cooling header unit to adjust at least one of the distance from the cooling header unit to the finishing rolling roll or the material and the angle formed by the cooling header unit with the material. It may further include a cooling header control unit for preventing the cooling fluid supplied to the material overlap (overlap).

More preferably, the cooling header adjusting unit is connected to the cooling header unit to move the cooling header unit along the wiper member to adjust a distance from the cooling header unit to the finishing rolling roll or the material. unit; And an angle adjusting unit connected to the device frame or the wiper member to adjust the angle formed by the cooling header unit with the material by rotating the device frame or the wiper member.

More preferably, the cooling header unit includes a plurality of cooling pipes provided on the wiper member so as to face the material and spaced apart from each other by a predetermined distance; And cooling nozzles provided in the cooling pipe and provided in plural in the width direction of the material.

More preferably, the distance control unit, a moving frame for supporting or fixing the cooling pipe; and a moving rail provided in the moving frame and the wiper member; And a power transmission means connected to the moving frame or the cooling pipe to move the moving frame or the cooling pipe along the moving rail.

More preferably, the power transmission means, a screw housing provided in the moving frame; And a screw member connected to the rotating shaft of the motor connected to the encoder and connected to the screw housing.

More preferably, the angle adjusting unit is provided with an angle adjusting motor having a rotating shaft connected to the device frame or the wiper member, and by rotating the device frame or the wiper member by the angle adjusting motor of the cooling nozzle The angle formed by the injection port and the material can be adjusted.

More preferably, the wiper device may further include a sensing unit provided in at least one of the device frame, the wiper member, and the cooling pipe, and electrically connected to a control means.

More preferably, the sensing unit, the angle sensor provided in the device frame or the wiper member; And a distance sensor provided in the cooling pipe.

More preferably, the exit cooling device is provided on the exit side of the finishing rolling roll to supply a cooling fluid to the finishing rolling roll; may further include.

More preferably, the material may be a material including at least one of medium carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon weight 0.3% or more) and niobium (N _b ) additive steel.

On the other hand, the present invention as another aspect of the present invention is a method of rolling a raw material in a rolling equipment, a rough rolling step of pressing the raw material with a rough rolling device; and supplying a cooling fluid to the raw material at the inlet side of the finishing rolling roll of the finishing rolling device. A side rolling step of pressurizing the material with the filament rolling roll after the side cooling step or during the side cooling step; And an exit cooling step of supplying a cooling fluid to the finishing rolling roll and the material at the exit side of the finishing rolling roll after the finishing rolling step or during the finishing rolling step.

Preferably, in the side cooling step, the cooling fluid is supplied to the plurality of cooling pipes spaced apart from each other by the distance from the finishing rolling roll, and the largest amount of cooling fluid is supplied from the most far away from the finishing rolling roll. And, the smallest amount of cooling fluid can be supplied in the closest to the finishing rolling roll.

More preferably, the side cooling step may include a nozzle adjusting step of changing the position of the nozzle for supplying the cooling fluid or rotating the nozzle.

More preferably, the nozzle adjusting step may be performed by changing the distance from the nozzle to the finishing rolling roll or the material or by changing the angle formed by the nozzle with respect to the material.

More preferably, the side cooling step, the temperature of the material of the material comprising at least one of medium carbon steel (carbon weight 0.08% ~ 0.3%), high carbon steel (carbon weight 0.3% or more) and niobium (N _b ) additive steel Cooling fluid can be supplied to the material so that the range of 850 ℃ to 900 ℃.

According to the present invention has an effect that can increase the life of the work roll and prolong the replacement cycle of the work roll.

In addition, it is possible to prevent the material from being rapidly cooled to lower the quality of the rolled product and to increase the cooling efficiency of the material and the work roll.

In addition, manufacturing costs can be reduced and product quality and productivity can be improved.

1 schematically illustrates a conventional rolling process.

Figure 2 schematically shows a rolling process according to the present invention.

Figure 3 schematically shows a rolling equipment according to the present invention.

Figure 4 schematically shows a cooling pipe according to the present invention.

5 is a perspective view of the wiper device according to the present invention.

Figure 6 schematically shows the arrangement of the cooling pipe according to the present invention.

7 is a perspective view of a wiper device according to another embodiment of the present invention.

8 schematically shows a rolling method according to the invention.

Figure 9 shows the physical properties of the raw material rolled by the present invention.

In order to facilitate understanding of the description of the embodiments of the present invention, the elements described with the same reference numerals in the accompanying drawings are the same elements, and the related elements among the components that will act the same in each embodiment may be represented by the same or extension numbers. Notation.

Further, in order to clarify the gist of the present invention, a description of elements and techniques well known by the prior art will be omitted, and hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

However, the spirit of the present invention is not limited to the embodiments presented, and may be proposed in other forms in which specific elements have been added, changed, or deleted by those skilled in the art, but are also included within the scope of the same spirit as the present invention. Leave it on.

Hereinafter, a case in which cooling water is used as the cooling fluid will be described as an example, but the type of cooling fluid is not necessarily limited by the present invention and may be appropriately changed and applied by those skilled in the art.

First, as shown in Figure 2, the rolling equipment 100 according to the present invention is provided with a rough rolling device 110 having a rough rolling roll 111 for pressing the material (1) to be conveyed, and the transport path of the material A finishing rolling device (120) having a finishing rolling roll (121) configured to pressurize a material having passed through the rough rolling device, and provided at an inlet side of the finishing rolling roll to polish the surface of the finishing rolling roll, It may include a wiper device 140 for supplying a cooling fluid to the material and a cooling device 130 provided in the conveying path of the material to cool the material passed through the finishing rolling device.

In this case, the cooling device 130 may be a runout table. In addition, the wiper device 140 may be provided in each of the finishing rolling rolls 121 provided in the material 1 conveying path, or may be provided only in the finishing rolling rolls 121 at any position. The present invention is not limited to the above, but is a matter that those skilled in the art can appropriately select and apply according to rolling conditions.

In addition, as shown in Figure 3, the entrance side of the finishing rolling roll 121 is provided with an entrance cooling unit 60 to supply the cooling water to the finishing rolling roll 121, the exit cooling on the exit side of the finishing rolling roll 121 The unit 70 may be provided to supply cooling water to the finishing rolling roll 121.

At this time, the wiper device 140 provided on the lower side of the side cooling unit 60 contacts the surface of the finishing rolling roll 121. And, if the surface of the finishing rolling roll is worn or damaged by foreign matter, etc., the wiper device 140 does not need to perform the finishing rolling roll replacement work separately by polishing the surface of the finishing rolling roll to increase the process efficiency. have.

The upper portion of the wiper device 140 may be provided with a lubrication unit 80 for supplying the rolling oil and air. The lubrication unit 80 may include a supply nozzle (not shown) provided in each of the supply pipes (not shown) connected to each of the lubricating oil supply means (not shown) and the air supply means (not shown). .

In addition, the wiper device 140 includes a plurality of cooling header units 143 for supplying a cooling fluid to the material at different positions.

The cooling header unit includes a cooling pipe 233 connected to a cooling water supply means (not shown), and a cooling nozzle 333 provided in the cooling pipe, wherein the cooling pipe 233 is the most on the finishing rolling roll 121. The first cooling pipe 233a disposed close to each other, the third cooling pipe 233c spaced farthest from the finishing rolling roll 121, the first cooling pipe 233a and the third cooling pipe 233b. It may include a second cooling pipe 233b disposed between.

However, the number of cooling pipes is not necessarily limited by the present invention, and may be appropriately selected and applied by those skilled in the art according to material properties and working environments.

As shown in FIG. 4, the cooling pipe 233 may be provided with a plurality of cooling nozzles 333 arranged in the width direction of the finishing rolling roll (121 of FIG. 3). In addition, the cooling nozzle 333 may be provided to inject a coolant to the material spaced apart a predetermined distance from the surface of the finishing rolling roll or the surface of the material.

At this time, since the cooling pipe 233 is spaced a predetermined distance from the finishing roll or the material, the cooling nozzle 333 is present in a predetermined position from the finishing rolling roll or the material, and the material surface from the cooling nozzle 333 Up to the first injection distance d ₁ , and from the cooling nozzle 333 at another position to the material surface, the second injection distance d ₂ .

In this case, the first injection distance (d ₁ ) is shorter than the _second injection distance (d ₂ ) in preparation for the first and second spraying distances, so that the cooling pipe 233 is disposed closer to the finishing roll or the material. It can be seen that the range is shortened.

It can be seen that the _second injection distance d ₂ is longer as the cooling pipe 233 is farther away from the finishing rolling roll or the material, and in this case, an overlap area that overlaps the cooling water injected from the cooling nozzle 333. It can be seen that (R) occurs.

As such, when the overlap region R is generated, it is difficult to uniformly supply the cooling water, and a large amount of the cooling water is aggregated in a specific region on the material, thereby lowering the cooling efficiency of the finishing roll and the material.

Accordingly, the present invention can improve such a problem, and provide a wiper device capable of providing a uniform cooling water and simultaneously improving the cooling efficiency of the raw material and the finishing rolling roll.

5 shows a wiper device 140 according to a preferred embodiment of the present invention.

The wiper device 140 according to an exemplary embodiment of the present invention includes an apparatus frame 141 disposed to be trailed by the finishing rolls 121 in the material 1 traveling direction.

The thickness of the raw material before entering the finishing rolling roll 121 is thicker than the thickness of the next material entering the finishing rolling roll 121, but the thickness of the raw material is relatively thick as the entrance side of the finishing rolling roll 121. The thickness of the raw material is thinner at the entrance side.

At this time, the device frame 141 may be disposed on the mouth side of the finishing rolling roll 121.

In addition, the wiper member 142 may be coupled to the device frame 141 by a coupling member (not shown). However, the wiper member 142 may be provided integrally with the device frame 141, which is not necessarily limited by the present invention and is a matter that can be appropriately changed and applied by those skilled in the art.

The apparatus frame 141 or the wiper member 142 may be provided with a cooling header unit 143, the cooling header unit 143 may be provided to supply the cooling water to the surface of the material (1). At this time, as described above, the cooling header unit 143 may be provided in the device frame 141 or the wiper member 142. Hereinafter, the cooling header unit 143 is provided in the wiper member 142. Explain.

However, this is for the purpose of clarity, not intended to limit the present invention, the location where the cooling header unit 143 is provided is a matter that can be appropriately selected by those skilled in the art.

In addition, when the cooling header unit 143 is provided in the apparatus frame 141 or the wiper member 142 at the side of the finishing rolling roll, the rolling mill space can be efficiently utilized. Therefore, according to the present invention, not only can a cooling header unit applicable to an actual rolling mill space be constructed, but also a suitable cooling header unit can be constructed in an actual rolling mill space.

In addition, according to the cooling header unit 143 of the present invention, there is an effect that can perform the material surface cooling according to the actual thickness of the material (1) regardless of the reduction ratio, finishing rolling roll gap, finishing rolling roll diameter and the like.

In the hot rolling process, the material may have different thicknesses according to physical conditions such as ambient temperature and material heating history even under the same rolling conditions and reduction ratios. Therefore, the data of the material whose thickness is estimated by the rolling conditions, the reduction ratio, etc. (in this case, since the thickness of the material is determined by the interval of the finishing rolling roll for pressing the material, the thickness of the material is determined by the interval between the finishing rolling rolls). If the cooling water is supplied, the cooling operation optimized for the actual material thickness cannot be performed.

Therefore, in the present invention, the cooling header unit 143 supplies the cooling water directly to the surface of the raw material 1 so as to cool the surface of the finishing roll roll entry material below the critical point. Such a method can cool the surface of the material more efficiently than the method of supplying the cooling water to the finishing rolling roll or the finishing rolling roll gap, and furthermore, it is possible to efficiently cool the finishing rolling roll.

In addition, there is an effect that can prevent the material surface defects caused by non-uniform cooling of the raw material and finishing rolling roll.

As described above, the cooling header adjusting unit which moves the cooling header unit 143 on the wiper member 142 to remove the overlap region (R of FIG. 4), which is a region where the coolant overlaps, to achieve more uniform cooling. 144 may be provided.

On the other hand, the cooling header unit may be provided with a plurality of the lower portion of the wiper member, to supply the largest amount of the cooling fluid at a position farthest away from the finishing rolling roll, and at a position closest to the finishing rolling roll It can be provided to supply the least amount of cooling fluid.

According to the cooling header unit provided as described above, it is possible to prevent the temperature of the material 1 from changing rapidly before entering the finishing rolling roll 121. That is, the smallest amount of cooling fluid is supplied from the third cooling pipe 233c farthest from the finishing rolling roll 121 to cool the raw material 1, and the third cooling pipe (233) is provided in the second cooling pipe 233b. Cooling the raw material 1 by supplying a larger amount of cooling fluid than 233c), and supplying the largest amount of cooling fluid through the first cooling pipe 233a immediately before the finishing rolling roll 121, the finishing rolling roll Brittle material can be prevented from being quenched before the raw material is introduced into the 121, which contributes to the improvement of moldability.

In particular, when the material (1) is a material containing at least one of medium carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon weight 0.3% or more), and niobium (N _b ) additive steel Can be maximized.

More preferably, by controlling the amount of cooling water supplied to the cooling pipe, the material temperature before being introduced into the finishing rolling roll 121 may be in a range of 850 ° C. or more and 900 ° C. or less to maximize the formability of the material 1. have.

9, the material 1 is a material including at least one of medium carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon weight 0.3% or more), and niobium (N _b ) additive steel. In this case, when the temperature of the material is between 850 ° C and 900 ° C, hematite (ferrous oxide; Fe ₂ O ₃ ) and magnetite (ferric oxide; Fe ₃ O ₄ ) are harder than filament rolling rolls. Since the fraction of is increased to cause the peeling of the skin, which is a surface defect, it is very effective to improve the surface temperature of the material to be 850 ℃ or more and 900 ℃ or less.

To this end, a separate temperature measuring means (not shown) may be provided at the entrance side of the finishing rolling roll 121, which is also a matter that can be selected and applied by those skilled in the art.

As described above, a sudden decrease in the surface temperature of the material causes a temperature drop throughout the material thickness direction, which adversely affects the rolling passivity, thereby uniformizing the material while preventing the quenching and the coolant overlap region (R in FIG. 4). Cooling is very important.

Therefore, by controlling the distance and angle of the cooling pipe 233 through the cooling header control unit 144, it is possible to cool the material 1 in an optimal state.

The cooling header adjusting unit may vary the distance from the cooling nozzle 333 to the material surface by moving the cooling pipe 233 on the wiper member 142 by the distance adjusting unit 343.

The distance adjusting unit 343 may change the position of the cooling nozzle 333 on the wiper member 142, thereby changing the injection distance which is the distance from the cooling nozzle 333 to the material surface.

According to the cooling header adjusting unit 144 provided as described above, it is possible to adopt a suitable position of the cooling pipe 233 according to the rolling conditions, thereby preventing the overlap of the cooling water supplied from the plurality of cooling nozzles, the cooling water It is effective to remove the overlap area, which is the overlap area.

This ultimately means that the cooling efficiency of the raw material and finishing rolling roll is improved, which means that the quality of the rolled product is improved.

Preferably, the cooling header adjusting unit 144 is cooled by rotating the wiper member 142 in which the cooling pipe 233 is installed by the angle adjusting unit (when the cooling pipe is installed in the device frame, by rotating the device frame). The angle formed by the nozzle 333 and the surface of the material 1 may be changed, which will be described later.

Meanwhile, in order to easily move the cooling pipe 233 on the wiper member 142, a moving frame 241 is provided between the wiper member 142 and the cooling pipe 233, and the moving frame 241 and the wiper member ( The moving rail 242 may be provided between the 142.

Preferably, the movable rail 242 may be provided as an LM guide, but this is not necessarily limited to the present invention and may be replaced by other guide means.

According to the moving frame 241 and the moving rail 242 as described above, the movement path of the cooling pipe 233 on the wiper member 142 can be set in advance, and the stable movement of the cooling pipe 233 can be realized. .

 The distance adjusting unit 343 for moving the cooling pipe 233 on the wiper member 142 includes a moving frame 241 for supporting or fixing the cooling pipe 233, and the moving frame and the wiper member 142. Is connected to the moving rail 242 and the moving frame or the cooling pipe may include a power transmission means 243 for moving the moving frame or the cooling pipe along the moving rail.

A screw member connected to the rotating shaft of the motor 246 connected to the screw housing 244 and the encoder 247 provided in the power transmission means 243, the screw member connected to the screw housing 244 and passes through the inside of the screw housing 245 may be included.

Preferably, a bracket member for supporting the screw member 245 is further provided between the screw member 245 and the screw housing 244 to support the screw member 245. When the length is long or the moving distance is long, the screw member 245 can be efficiently supported, and the screw member 245 can be prevented from sagging due to the load.

However, this is also not necessarily limited to the present invention and is a matter that can be appropriately selected and applied by those skilled in the art.

The screw member 245 may include a screw thread protruding from the outer circumference, and a screw groove engaged with the screw thread of the screw member 245 may be provided inside the screw housing 244. At this time, when the screw member 245 is rotated by the motor 246, the screw housing 244 does not rotate, it is provided to make a linear movement, the moving frame 241 connected to the screw housing 244 is a moving rail It can be linear movement along (242).

Preferably, a bearing (not shown) is provided in a region where the screw housing 244 is engaged with the screw member 245 to prevent rotation of the screw housing 244 due to the rotation of the screw member 245.

When the moving frame 241 moves, the cooling pipe 233 moves. The distance that the cooling pipe 233 moves may be sensed by the encoder 247. The encoder 247 may calculate the linear travel distance by sensing the rotational speed of the motor 246. Preferably, the encoder 247 may be more efficiently performed by a control means (not shown) electrically connected to the encoder 247. .

By moving the moving frame 241 through the rotation of the motor 246 it is possible to adjust the distance that the cooling pipe 233 is separated from the surface of the material (1). Therefore, by adjusting the position of the cooling pipe 233 using this, the injection distance of the cooling water can be adjusted, and by adopting the position of the appropriate cooling pipe 233 according to the rolling conditions, the cooling water injected from the cooling nozzle 333 overlaps with each other. It is possible to prevent the overlap region (R in FIG. 4) that is the region from occurring.

At this time, the cooling pipe 233 may be provided so as to control each individually, but this is a matter that can be selected by those skilled in the art is not necessarily limited by the present invention.

On the other hand, the present invention provides a sensing unit 145 shown in FIG. The moving distance and position of the cooling pipe 233 may be grasped by the distance sensor 355 provided in the cooling pipe 233. Preferably, the distance sensor 355 may also be electrically connected to a control means (not shown).

In addition, the cooling nozzle 333 of the cooling pipe 233 may adjust the angle (θ) at which the cooling water is injected. The angle θ for spraying the coolant may be adjusted by rotating the wiper device 140, specifically, the wiper member (142 of FIG. 5) or the device frame (141 of FIG. 5) at an angle.

In addition, the angle θ of spraying the coolant may be sensed by the angle sensor 255 that may be provided in the wiper member.

On the other hand, when the distance from the cooling pipe to the surface of the raw material 1 is h, the injection distance (d) is as shown in [Equation 1].

Before the raw material 1 is drawn into the finishing rolling roll 121, the thickness of the entrance raw material 1 is set, and the value of the angle θ at which the coolant is injected by the angle sensor 255 can be known. At this time, the optimum injection distance where the coolant overlap area does not occur may be a value derived in advance, but the angle θ for spraying the coolant does not change after the initial setting when the diameter of the finishing rolling roll 121 and the target material are determined. Value.

Therefore, the cooling pipe can be moved to an optimum injection distance through which the overlap region does not occur through the distance adjusting unit 343 of the present invention, and sprays the cooling water initially determined through the angle adjusting unit (350 of FIG. 7). The device frame or wiper member may be rotated to form an angle θ.

That is, when the distance from the current cooling pipe to the surface of the material 1 is h ', the movement amount d' of the cooling pipe 233 for setting the optimum injection distance d _opt is expressed by Equation 2 below.

In this case, when each cooling pipe is provided to change the distance and angle collectively, [Equation 1], [Equation 2] can be calculated based on the first cooling pipe 233a, each cooling pipe When the distance and the protractor are provided to be changed separately, the above [Formula 1], [Formula 2] can be applied separately for each cooling pipe, the injection distance and the injection angle can also be calculated separately in each cooling pipe. have.

Hereinafter, referring to FIG. 7, a configuration of adjusting the angle θ of spraying the coolant is described in detail. The angle θ of spraying the coolant is connected to the device frame 141 or the wiper member 142. By rotating the device frame or the wiper member may be adjusted by the angle adjusting unit 350 for adjusting the angle formed by the cooling header unit 143 and the surface of the material (1).

Hereinafter, a case in which the angle adjustment unit 350 is provided in the device frame 141 will be described as an example, but this is not necessarily limited to the present invention and is a matter that can be appropriately changed and applied by those skilled in the art.

The angle adjusting unit 350 may include an angle adjusting motor 351 to which the rotating shaft is connected to the apparatus frame. In this case, the encoder 352 may also be connected to the angle adjusting motor 351.

Preferably, the device frame 141 may also be provided with an angle sensor 163 to detect the rotation state and angle, all of the above sensors are electrically connected to a control means (not shown) so that the information is transmitted to the operator. Can be configured.

As such, when the device frame 141 is rotated by the angle adjusting motor 351, the wiper member 142 connected to the device frame 141 is rotated, and thus the cooling nozzle 333 is rotated.

Therefore, the operator can adjust the angle (θ) that the cooling nozzle 333 sprays the coolant on the surface of the material 1 according to the same principle. It can be more effective in preventing.

Hereinafter, a case in which the angle adjustment unit 350 is provided in the device frame 141 will be described as an example, but this is not necessarily limited to the present invention and is a matter that can be appropriately changed and applied by those skilled in the art.

The angle adjusting unit 350 may include an angle adjusting motor 351 to which the rotating shaft is connected to the apparatus frame. In this case, the encoder 352 may also be connected to the angle adjusting motor 351.

Preferably, the device frame 141 may also be provided with an angle sensor 163 to detect the rotation state and angle, all of the above sensors are electrically connected to a control means (not shown) so that the information is transmitted to the operator. Can be configured.

As such, when the device frame 141 is rotated by the angle adjusting motor 351, the wiper member 142 connected to the device frame 141 is rotated, and thus the cooling nozzle 333 is rotated.

Therefore, the operator can adjust the angle (θ) that the cooling nozzle 333 sprays the coolant on the surface of the material 1 according to the same principle. It can be more effective in preventing.

On the other hand, the present invention as another aspect of the present invention, as shown in Figure 8, the rough rolling step of pressing the material with a rough rolling device by a method of rolling the material in a rolling equipment (S610), at the inlet side of the finishing rolling roll of the finishing rolling device Side cooling step (S620) for supplying the coolant to the material, after the side cooling step or during the side cooling step, the finishing rolling step (S630) and the finishing rolling step or the finishing rolling step of pressing the material with the finishing rolling roll It may include a side cooling step (S640) for supplying the cooling water to the finishing rolling roll and the material at the exit side of the finishing rolling roll.

At this time, the side cooling step (S620) may include a nozzle adjustment step (S621) for changing the position of the nozzle for supplying the cooling water or rotate the nozzle, the nozzle adjustment step from the nozzle to the finishing rolling roll or the This can be done by changing the distance to the material or by changing the angle the nozzle forms with respect to the material.

Here, the exit cooling step S640 may be performed by supplying cooling water to the finishing rolling roll 121 at the exit side of the finishing rolling roll 121 by the exit cooling unit 70.

According to such a rolling method, it is possible to uniformly spray the cooling water onto the surface of the material, and accordingly, the cooling of the surface of the material can be performed efficiently, thereby preventing the phenomenon of partial or complete peeling of the surface of the rolling roll. There is an effect to further improve.

The matters described above have been described with respect to an embodiment of the present invention, and the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be apparent to one of ordinary skill in the art.

Claims (17)

A rough rolling device having a rough rolling roll for pressurizing the conveyed material; A finishing rolling apparatus provided in a conveying path of the raw material and having a finishing rolling roll for pressing the raw material passing through the rough rolling device; A wiper device provided at an inlet side of the finishing rolling roll to polish a surface of the finishing rolling roll and supply a cooling fluid to the material; And Included in the conveying path of the material cooling device for cooling the material passed through the finishing rolling device; including, The wiper device, And a plurality of cooling header units for supplying cooling fluid to the material at different positions. The method of claim 1, The wiper device, An apparatus frame disposed to follow the finishing roll in the material traveling direction; A wiper member provided in the apparatus frame; And It is provided in the apparatus frame or the wiper member, and supplies the largest amount of cooling fluid at a position farthest from the finishing rolling roll, and supplies the smallest amount of cooling fluid at a position closest to the finishing rolling roll. Cooling header unit; Rolling equipment comprising a. The method of claim 2, The wiper device, The cooling fluid supplied to the material is connected to the cooling header unit by adjusting at least one of a distance from the cooling header unit to the finishing roll or the material and the angle formed by the cooling header unit with the material. Cooling header control unit to prevent overlap; Rolling equipment characterized in that it further comprises. The method of claim 3, The cooling header control unit, A distance adjusting unit connected to the cooling header unit to move the cooling header unit along the wiper member to vary the distance from the cooling header unit to the finishing rolling roll or the material; And An angle adjusting unit connected to the device frame or the wiper member to rotate the device frame or the wiper member to adjust an angle formed by the cooling header unit with the material; Rolling equipment comprising a. The method of claim 4, wherein The cooling header unit, A plurality of cooling pipes provided on the wiper member so as to face the material and spaced apart from each other by a predetermined distance; And Cooling nozzles provided in the cooling pipe, the plurality of cooling nozzles provided in the width direction of the material; Rolling equipment comprising a. The method of claim 5, The distance control unit, A moving frame supporting or fixing the cooling pipe; A moving rail provided on the moving frame and the wiper member; And A power transmission means connected to the moving frame or the cooling pipe to move the moving frame or the cooling pipe along the moving rail; Rolling equipment comprising a. The method of claim 6, The power transmission means, A screw housing provided in the moving frame; And A screw member connected to a rotating shaft of a motor connected to an encoder and connected to the screw housing; Rolling equipment comprising a. The method of claim 5, The angle adjustment unit, An angle adjusting motor having a rotating shaft connected to the apparatus frame or the wiper member, and adjusting the angle formed by the injection hole of the cooling nozzle with the material by rotating the apparatus frame or the wiper member by the angle adjusting motor. Rolling equipment. The method of claim 8, The wiper device, A sensing unit provided in at least one of the apparatus frame, the wiper member, and the cooling pipe and electrically connected to a control means; Rolling equipment characterized in that it further comprises. The method of claim 9, The detection unit, An angle sensor provided in the device frame or the wiper member; And A distance sensor provided in the cooling pipe; Rolling equipment comprising a. The method according to any one of claims 1 to 10, An exit cooling device provided at the exit side of the finishing rolling roll to supply a cooling fluid to the finishing rolling roll; Rolling equipment characterized in that it further comprises. The method of claim 11, The material is a rolling equipment, characterized in that the material comprising at least one of medium carbon steel (carbon weight 0.08% ~ 0.3%), high carbon steel (carbon weight 0.3% or more) and niobium (N _b ) additive steel. By rolling the material by rolling equipment, A rough rolling step of pressurizing the material with a rough rolling device; An entrance cooling step of supplying a cooling fluid to the material at the entrance of the finishing rolling roll of the finishing rolling device; A finishing rolling step of pressing the material with the finishing rolling roll after the entering side cooling step or during the entering side cooling step; And An exit cooling step of supplying a cooling fluid to the finishing rolling roll and the material at the exit side of the finishing rolling roll after the finishing rolling step or during the finishing rolling step; Rolling method comprising a. The method of claim 13, The side cooling step, Cooling fluid is supplied to the plurality of cooling pipes spaced apart from the finishing rolling roll by a different distance, the largest amount of cooling fluid is supplied from the most far away from the finishing rolling roll, and closest to the finishing rolling roll. Rolling method characterized in that to supply the least amount of cooling fluid in the place. The method of claim 14, The side cooling step, A nozzle adjusting step of changing a position of a nozzle for supplying a cooling fluid or rotating the nozzle; Rolling method comprising a. The method of claim 15, The nozzle adjustment step, Rolling method, characterized in that for changing the distance from the nozzle to the finishing rolling roll or the material or the angle formed by the nozzle relative to the material. The method according to any one of claims 14 to 16, The side cooling step, The temperature of the material of the material including at least one of medium carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon weight 0.3% or more) and niobium (N _b ) additive steel ranges from 850 ° C to 900 ° C Rolling method, characterized in that for supplying a cooling fluid to the material.

Images