KR20190065221A - Apparatus and method for rolling - Google Patents

Abstract

The present invention relates to a rolling facility and a rolling method. The present invention provides the rolling facility, comprising: a roughing mill provided with roughing rolls pressurizing a transferred workpiece; a finishing mill having finishing rolls provided on a transfer path of the workpiece to pressurize the workpiece having passed through the roughing mill; a wiper apparatus provided at an entry side of the finishing rolls to grind the surface of the finishing rolls and supplying a cooling fluid to the workpiece; and a cooling apparatus provided on the transfer path of the workpiece to cool the workpiece having passed through the finishing mill, wherein the wiper apparatus includes a plurality of cooling header units supplying the cooling fluid to the workpiece at different positions, and the plurality of cooling header units may supply the cooling fluid to the workpiece before the workpiece comes into contact with the finishing rolls within a range of the wiper apparatus. The present invention can prevent damage to work rolls pressurizing the workpiece in a hot rolling process and enhance the quality of rolling products.

Description

[0001] APPARATUS AND METHOD FOR ROLLING [0002]

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

Fig. 1 schematically shows a hot rolling step for producing a hot-rolled steel sheet. In the hot rolling step, the slabs having passed through the heating furnace 10 are transferred to a roughing mill 20 by a feed roll 5 and subjected to rough rolling, followed by finish rolling in a finishing mill 30 , Cooling it in a run-out table (40), and then winding it in a coil form in a winding device (50).

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

However, since the work roll used in such a hot rolling process repeatedly contacts with a hot slab or a steel plate, the heat input from a hot slab or steel plate must be taken into consideration.

When the work roll is exposed to high temperature for a long time, it is placed in a thermal fatigue state. On the surface of the steel plate contacting with the work roll, a high intensity scale such as hematite and magnetite is generated. Which is a part or completely peeled off. As such, peeling of the black strip on the surface of the rolled roll causes a spindle scale and a sand scale on the surface of the product, thereby deteriorating the quality of the product.

Therefore, in the hot rolling process, the thermal fatigue phenomenon of the work roll must be suppressed and the temperature of the work roll must be properly controlled. In order to appropriately control the temperature of the work roll, a method of spraying cooling water on the work roll can be used.

However, since the problem of large concentration of cooling water in the work roll specific area may occur depending on the distance that the nozzle for spraying the cooling water to the work roll is separated from the rolling roll, the position of injecting the cooling water must be very carefully controlled.

In addition, cooling only the work roll which repeatedly contacts the high-temperature steel sheet may cause a decrease in the cooling efficiency.

KR 10-0406372 B1 (2003.11.07)

An object of the present invention is to prevent damage to a work roll which presses a work in a hot rolling step and to improve the quality of a rolled product.

It is also an object of the present invention to prevent the material from being rapidly cooled before entering the work roll, and to increase the cooling efficiency of the work roll and the work.

In addition, the object of the present invention is to increase the efficiency and productivity of the rolling process.

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

The rolling facility according to the present invention includes: a rough rolling apparatus having a rough rolling roll for pressing a material to be fed; and a finishing rolling roll provided on a conveying path of the material to press the material passed through the roughing rolling apparatus A wiping 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 a cooling device provided in a conveying 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 cooling fluid to the material at different positions; And a plurality of the cooling header units may supply a cooling fluid to the material before the material contacts the finishing rolling roll within a range of the wiper device.

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

More preferably, the wiper device is connected to the cooling header unit to adjust at least one of a distance from the cooling header unit to the finishing rolling roll or the material and an angle formed by the cooling header unit with the material, And a cooling header adjusting unit for preventing the cooling fluid supplied to the workpiece from overlapping with each other.

More preferably, the cooling header adjustment unit is connected to the cooling header unit, and moves the cooling header unit along the wiper member to adjust the distance from the cooling header unit to the finishing rolling roll or the material unit; And an angle adjusting unit connected to the apparatus frame or the wiper member to rotate the apparatus frame or the wiper member so as to adjust an angle formed by the cooling header unit with the workpiece.

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

More preferably, the distance adjusting unit comprises: a moving frame for supporting or fixing the cooling pipe; a moving rail provided on the moving frame and the wiper member; And 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 transmitting means includes: a screw housing provided in the moving frame; And a screw member connected to the rotary shaft of the motor connected to the encoder and connected to the screw housing.

More preferably, the angle adjusting unit includes an angle adjusting motor in which a rotation axis is connected to the apparatus frame or the wiper member, and the angle adjusting motor rotates the apparatus frame or the wiper member, The angle at which the jetting port forms with the material can be adjusted.

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

More preferably, the sensing unit comprises: an angle sensor provided on the apparatus frame or the wiper member; And a distance sensor provided in the cooling pipe.

The apparatus may further include an outgoing cooling device provided on an outgoing side of the finishing rolling roll to supply a cooling fluid to the finishing rolling roll.

More preferably, the material may be a material comprising at least one of heavy carbon steel (0.08% to 0.3% by weight of carbon), high carbon steel (0.3% or more by carbon weight) and niobium (Nb)

According to another aspect of the present invention, there is provided a method of rolling a material with a rolling facility, the method comprising: a rough rolling step of pressing the material with a rough rolling device; a step of supplying a cooling fluid to the material at the entry side of the finishing roll of the finishing rolling device A finishing step for finishing the material with the finishing rolling roll after the inlet cooling step or during the inlet cooling step; And an out-side 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, There is provided a rolling method for supplying a cooling fluid to a material before contact with a finishing rolling roll.

Preferably, the incoming cooling step further comprises supplying the cooling fluid to a plurality of cooling lines spaced a different distance from the finishing rolling roll, wherein the cooling fluid is supplied at the greatest distance from the finishing rolling roll And it is possible to supply the smallest amount of cooling fluid nearest to the finishing rolling roll.

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

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

More preferably, the inlet side cooling step is performed such that the temperature of a material including at least one of heavy carbon steel (0.08% to 0.3% by weight of carbon), high carbon steel (0.3% or more by carbon weight) and niobium The cooling fluid may be supplied to the material so as to be in a range of 850 DEG C or higher and 900 DEG C or lower.

According to the present invention, the lifetime of the work roll can be increased and the replacement cycle of the work roll can be extended.

Further, the material is rapidly cooled to prevent the quality of the rolled product from deteriorating, and the cooling efficiency of the material and the work roll can be increased.

Further, the manufacturing cost can be reduced, and the product quality and productivity can be improved.

Fig. 1 schematically shows a conventional rolling process.
2 schematically shows a rolling process according to the present invention.
Figure 3 schematically shows a rolling facility according to the invention.
Figure 4 schematically shows a cooling piping according to the invention.
5 is a perspective view of a wiper device according to the present invention.
6 schematically shows the arrangement of the cooling pipes according to the present invention.
7 is a perspective view of a wiper apparatus according to another embodiment of the present invention.
8 schematically shows a rolling method according to the present invention.
Fig. 9 shows the physical properties of the material rolled by the present invention.

In order to facilitate an understanding of the description of the embodiments of the present invention, elements denoted by the same reference numerals in the accompanying drawings are the same element, and among the constituent elements that perform the same function in each embodiment, Respectively.

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

It is to be understood, however, that the spirit and scope of the present invention are not limited to the embodiments shown, but may be suggested by those skilled in the art in other forms, additions, or alternatives, .

Hereinafter, the case where the cooling water is used as the cooling fluid is described as an example, but the kind of the cooling fluid is not necessarily limited by the present invention, and can be appropriately changed and applied by those skilled in the art.

2, the rolling mill 100 according to the present invention includes a rough rolling device 110 having a rough rolling roll 111 for pressing a material 1 to be fed, A finishing rolling apparatus (120) provided with a finishing rolling roll (121) for pressurizing a work having passed through the roughing rolling apparatus; a finishing apparatus provided on an inlet side of the finishing rolling roll to polish a surface of the finishing rolling roll A wiper device 140 for supplying a cooling fluid to the material, and a cooling device 130 provided in a conveying path of the material to cool the material passed through the finishing rolling device.

At this time, the cooling device 130 may be a run-out table. The wiper device 140 may be provided in each of the finishing rolling rolls 121 provided in the feed path of the work 1 or may be provided only in the finishing rolling roll 121 at any position, But can be appropriately selected and applied by those skilled in the art depending on rolling conditions and the like.

3, the inlet side cooling unit 60 is provided at the inlet side of the finishing rolling roll 121 so that cooling water can be supplied to the finishing rolling roll 121. On the exit side of the finishing rolling roll 121, Unit 70 may be provided to supply the cooling water to the finishing rolling roll 121. [

At this time, the wiper device 140 provided at the lower portion of the inlet side cooling unit 60 is in contact with the surface of the finishing rolling roll 121. Further, when the surface of the finishing roll is worn or damaged by a foreign substance or the like, the wiper device 140 does not need to separately perform the finishing roll replacement operation by polishing the surface of the finishing roll, thereby increasing the process efficiency have.

A lubricating unit 80 for supplying rolling oil and air may be provided on the upper part of the wiper device 140. The lubrication unit 80 may include a plurality of supply lines (not shown) connected respectively to lubricating oil supply means (not shown) and air supply means (not shown) and supply nozzles .

In addition, the wiper device 140 includes a plurality of cooling header units 143 that supply cooling fluid to the workpiece at different positions.

The cooling header unit includes a cooling pipe 233 connected to cooling water supply means (not shown) and a cooling nozzle 333 provided in the cooling pipe. The cooling pipe 233 is connected to the finishing roll 121 A third cooling pipe 233c spaced farthest from the finishing rolling roll 121 and a second cooling pipe 233b disposed adjacent to the first cooling pipe 233a and the third cooling pipe 233b, And a second cooling pipe 233b disposed between the first cooling pipe 233a and the second cooling pipe 233b.

However, the number of cooling pipes is not necessarily limited by the present invention, but may be appropriately selected and applied by those skilled in the art depending on the material characteristics and the working environment.

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 roll (121 in FIG. 3). The cooling nozzles 333 may be provided to spray cooling water to the work by being spaced apart from the surface of the finishing roll or the surface of the work.

At this time, since the cooling pipe 233 is separated from the finishing rolling roll or the material by a predetermined distance, the cooling nozzle 333 is present at a predetermined position from the finishing rolling roll or the material, And the distance from the cooling nozzle 333 at another position to the surface of the workpiece is defined as the second jetting distance d2.

In this case, as compared with the first and second firing angles, the first firing distance d1 is shorter than the second firing distance d2, and the closer the cooling pipe 233 is disposed to the finishing rolling roll or the material, .

 It can be seen that the second separation distance d2 becomes longer as the cooling pipe 233 is spaced away from the finishing rolling roll or the material. In this case, overlapping regions of cooling water jetted from the cooling nozzles 333 R) is generated.

When the overlap region R is generated as described above, it is difficult to uniformly supply the cooling water, and a large amount of cooling water is accumulated in a specific region on the material, which lowers the cooling efficiency of the finishing roll and the material.

Accordingly, the present invention provides a wiper device capable of improving the cooling efficiency of the material and the finishing rolling roll, capable of improving the above problems, and capable of uniformly supplying the cooling water.

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

The wiper device 140 according to the preferred embodiment of the present invention includes a device frame 141 which is disposed behind the finishing roll 121 in the traveling direction of the work 1. [

The thickness of the material before being drawn into the finishing rolling roll 121 is thicker than the thickness of the material after being drawn into the finishing rolling roll 121. The thickness of the material is relatively thick at the entry side of the finishing rolling roll 121 And the thinner the thickness of the material than the side of the material is called the "exit".

At this time, the apparatus frame 141 may be disposed at the entrance of the finishing roll 121.

The wiper member 142 may be coupled to the apparatus frame 141 by a coupling member (not shown). However, the wiper member 142 may be integrally formed with the apparatus frame 141. However, the wiper member 142 is not limited to the present invention, and may be appropriately modified by those skilled in the art.

A cooling header unit 143 may be provided in the apparatus frame 141 or the wiper member 142 and the cooling header unit 143 may be provided to supply cooling water to the surface of the work 1. [ At this time, the cooling header unit 143 may be provided in the apparatus frame 141 or the wiper member 142 as described above. Hereinafter, a case where the cooling header unit 143 is provided in the wiper member 142 is described as an example Explain it.

However, this is for the sake of clarity and not for the purpose of limiting the present invention, and the position where the cooling header unit 143 is provided can be appropriately selected by a person skilled in the art.

Further, if the cooling header unit 143 is provided in the apparatus frame 141 or the wiper member 142 on the side of the finishing rolling roll, the rolling mill space can be efficiently utilized. Therefore, according to the present invention, it is possible not only to construct a cooling header unit applicable in the actual mill space, but also to construct a suitable cooling header unit in the actual mill space.

According to the cooling header unit 143 of the present invention, the material surface cooling according to the actual thickness of the material 1 can be performed regardless of the reduction rate, the finishing rolling roll gap, the finishing roll diameter, and the like.

In the hot rolling process, the materials may have different thicknesses depending on the physical conditions such as the rolling conditions, the rolling temperature and the material heating history even under the rolling reduction. Therefore, the data of the material whose thickness is estimated by the rolling condition, the reduction rate, etc. (In this case, the thickness of the material is determined by the interval of the finishing rolling rolls pressing the material. It is impossible to perform cooling work optimized for the actual material thickness.

Therefore, in the present invention, the cooling header unit 143 supplies the cooling water directly to the surface of the work 1 to cool the surface of the material on the finish side of the finishing roll to a temperature below the critical point. Such a method can efficiently cool the surface of a workpiece as compared with a method of supplying cooling water to a finishing rolling roll or a finishing rolling roll gap, and further has an effect of efficiently cooling up to a finishing rolling roll.

In addition, there is an effect that surface defects of the material caused by uneven cooling of the material and the finishing roll can be prevented.

The cooling header unit 143 is moved on the wiper member 142 so as to remove the overlap region (R in Fig. 4), which is an overlap region of the cooling water, 144 of FIG. 7) may be provided.

On the other hand, a plurality of cooling header units may be provided in the lower part of the wiper member, and the cooling head unit may supply the largest amount of cooling fluid at a position farthest away from the finishing rolling roll, And may be provided to supply the least amount of cooling fluid.

According to the cooling header unit thus provided, it is possible to prevent the temperature of the work 1 from suddenly changing before entering the finishing rolling roll 121. That is, the minimum amount of the cooling fluid is supplied from the third cooling pipe 233 farthest from the finishing rolling roll 121 to cool the material 1, and the second cooling pipe 233b to the third cooling pipe 233c to cool the material 1 and supply the greatest amount of cooling fluid through the first cooling pipe 233a immediately before the finishing rolling roll 121, It is possible to prevent brittleness from occurring due to rapid cooling of the material before being drawn into the mold 121, thereby contributing to an improvement in moldability.

Particularly, when the material (1) is a material containing at least one of heavy carbon steel (0.08% to 0.3% of carbon weight), high carbon steel (0.3% or more of carbon weight) and niobium .

More preferably, the amount of the cooling water to be supplied to the cooling pipe is controlled so that the material temperature before being drawn into the finishing rolling roll 121 is in the range of 850 to 900 캜 to maximize the formability of the material (1) have.

9, when the material 1 is a material containing at least one of heavy carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon steel 0.3% or more) and niobium (Nb) (Ferrous oxide; Fe ₂ O ₃ ) and magnetite (ferric oxide; Fe ₃ O ₄ ), which are harder than the finishing rolls, when the material temperature is in the range of 850 ° C. to 900 ° C. The surface fraction of the material is increased to cause the peeling of the surface, which is a surface defect, so that the surface temperature of the material is preferably 850 ° C or more and 900 ° C or less.

For this purpose, as shown in FIGS. 5 to 7, a separate temperature measuring means (not shown) may be provided at the entrance of the finishing rolling roll 121, but this can also be selected and applied by those skilled in the art.

As described above, the sudden decrease in the surface temperature of the material causes a decrease in the temperature in the entire thickness direction of the material, which adversely affects the rolling conveyance. Therefore, It is very important to cool down.

Therefore, the material 1 can be cooled to an optimum state by adjusting the distance and angle of the cooling pipe 233 through the cooling header adjusting unit 144. [

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

The distance adjustment unit 343 can change the position of the cooling nozzle 333 on the wiper member 142 and thereby change the distance of the spray from the cooling nozzle 333 to the work surface.

According to the cooling header adjusting unit 144 thus provided, it is possible to adopt the position of the cooling pipe 233 appropriate for the rolling conditions, thereby preventing the cooling water supplied from the plurality of cooling nozzles from overlapping, There is an effect that the overlap region which is the overlap region can be removed.

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

Preferably, the cooling header adjustment unit 144 is configured to rotate the wiper member 142 (by rotating the apparatus frame when the cooling pipe is installed in the apparatus frame) by cooling the wipe member 142 provided with the cooling pipe 233 by the angle adjusting unit, The angle at which the nozzle 333 forms with the surface of the work 1 may be changed, which will be described later.

A moving frame 241 is provided between the wiper member 142 and the cooling pipe 233 so as to easily move the cooling pipe 233 on the wiper member 142. The moving frame 241 and the wiper member 142 may be provided with a moving rail 242.

Preferably, the moving 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 guiding means.

According to the moving frame 241 and the moving rail 242, the movement path of the cooling pipe 233 can be set in advance on the wiper member 142, 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 a power transmitting means (243) connected to the moving frame or the cooling pipe to move the moving frame or the cooling pipe along the moving rail.

A screw housing 244 connected to the rotation shaft of the motor 246 connected to the screw housing 244 and the encoder 247 provided in the power transmitting means 243 and connected to the screw housing 244, (245).

A bracket member for supporting the screw member 245 may be further provided between the screw member 245 and the screw housing 244 to support the screw member 245. When the screw member 245 is provided, The screw member 245 can be efficiently supported when the length is long or the moving distance is long, and the screw member 245 due to the load can be prevented from becoming stuck.

However, the present invention is not necessarily limited to the present invention, but may be appropriately selected and applied by those skilled in the art.

The screw member 245 may be provided with threads protruding from the outer circumference and the screw housing 244 may be provided with a thread groove that engages with the thread of the screw member 245. At this time, when the screw member 245 is rotated by the motor 246, the screw housing 244 does not rotate but is arranged to perform a linear motion, so that the movable frame 241 connected to the screw housing 244 is moved It is possible to linearly move along the second axis 242.

A bearing (not shown) may be provided in a region where the screw housing 244 engages 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, and the distance that the cooling pipe 233 moves can be detected by the encoder 247. The encoder 247 can sense the number of revolutions of the motor 246 to calculate the rectilinear travel distance, which can preferably be performed more efficiently by control means (not shown) electrically connected to the encoder 247 .

The distance by which the cooling pipe 233 is separated from the surface of the work 1 can be adjusted by moving the moving frame 241 through the rotation of the motor 246. Accordingly, by adjusting the position of the cooling pipe 233, it is possible to adjust the spreading distance of the cooling water, and by adopting the appropriate position of the cooling pipe 233 according to the rolling conditions, the cooling water injected from the cooling nozzle 333 is superimposed It is possible to prevent the overlap region (R in Fig. 4) from being generated.

At this time, the cooling pipe 233 may be separately controlled, but this is not a limitation of the present invention.

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

In addition, the cooling nozzle 333 of the cooling pipe 233 may adjust the angle? At which the cooling water is sprayed. The angle θ for spraying the cooling water can be adjusted by rotating the wiper device 140, specifically the wiper member (142 in FIG. 5) or the apparatus frame (141 in FIG.

The angle? For spraying the cooling water can be sensed by an angle sensor 255 that may be provided on the wiper member.

On the other hand, when the distance from the cooling pipe to the surface of the work (1) is h, the separation distance (d) is as shown in the following [Expression 1].

[Equation 1]

The thickness of the raw material 1 is set before the raw material 1 is drawn into the finishing rolling roll 121 and the value of the angle θ at which the cooling water is injected by the angle sensor 255 can be known. In this case, the optimum injection distance at which the cooling water overlap region does not occur may be a previously derived value. The angle (?) For injecting cooling water does not change after the diameter of the finishing roll 121 and the initial setting Lt; / RTI >

Therefore, the cooling pipe can be moved to the optimum spraying distance at which the overlap area does not occur through the distance control unit 343 of the present invention, and the cooling water can be sprayed through the angle adjusting unit (350 in Fig. 7) The apparatus frame or wiper member may be rotated to form the angle [theta].

In other words, if the distance from the present cooling pipe to the surface of the work 1 is h ', the movement amount d' of the cooling pipe 233 for setting the optimum d _opt is as shown in the following equation.

[Equation 2]

At this time, when each of the cooling pipes is provided so that the distance and the angle are collectively changed, the above-mentioned [Expression 1] and [Expression 2] can be calculated on the basis of the first cooling pipe 233a, The equations (1) and (2) can be individually applied to the respective cooling pipes, and the spraying distance and the spraying angle can be separately calculated from the respective cooling pipes have.

7, an angle θ for spraying the cooling water is connected to the apparatus frame 141 or the wiper member 142. In this case, And may be adjusted by an angle adjusting unit 350 that adjusts the angle at which the cooling header unit 143 is formed with the surface of the work 1 by rotating the apparatus frame or the wiper member.

Hereinafter, the case where the angle regulating unit 350 is provided in the apparatus frame 141 will be described as an example, but the present invention is not limited to the present invention and can be appropriately changed by those skilled in the art.

The angle adjusting unit 350 may include an angle adjusting motor 351 whose rotational axis is connected to the apparatus frame. At this time, 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 to sense the rotational state and angle, all of which may be electrically connected to control means (not shown) have.

When the apparatus frame 141 is rotated by the angle adjusting motor 351 as described above, the wiper member 142 connected to the apparatus frame 141 rotates, and the cooling nozzle 333 rotates accordingly.

Accordingly, the operator can adjust the angle? Of spraying the cooling water on the surface of the work 1 according to this principle. In addition to the distance for spraying the cooling water, if the angle is adjusted together, It can be more effective in preventing the problem.

As shown in FIG. 8, the present invention as another aspect relates to a method of rolling a material by a rolling facility, comprising: a rough rolling step (S610) of pressing the material with a roughing rolling apparatus; (S620) for supplying a cooling fluid to the material; a finishing step (S620) for supplying a cooling fluid to the material; a finishing step (S630) for pressing the material with the finishing rolling roll after the finishing step or during the finishing step And an outgoing cooling step (S640) for supplying a cooling fluid to the finishing rolling roll and the material at the exit side of the finishing rolling roll during the rolling step, wherein the inlet cooling step is performed before the material is contacted with the finishing rolling roll And a cooling fluid is supplied to the material.

The inlet cooling step S620 may include a nozzle adjustment step S621 for changing the position of the nozzle supplying the cooling fluid or rotating the nozzle.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be apparent to those of ordinary skill in the art.

100: rolling facility 110: rough rolling device
111: rough rolling 120: finishing rolling apparatus
121: finishing roll 130: cooling device
140: Wiper device 141: Device frame
142: wiper member 143: cooling header unit
144: cooling header adjustment unit 145: sensing unit
233: cooling piping 241: moving frame
242: moving rail 243: power transmission means
244: screw housing 245: screw member
246: Motor 247: Encoder
255: angle sensor 333: cooling nozzle
350: Angle adjusting unit 351: Angle adjusting motor
352: Encoder 355: Distance sensor

Claims (17)

A rough rolling apparatus having a rough rolling roll for pressing a material to be fed;
A finishing rolling apparatus provided on a conveying path of the work and having a finishing rolling roll for pressing a work having passed through the roughing apparatus;
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
And a cooling device provided in a conveying path of the material to cool the material passing through the finishing rolling device,
The wiper device
And a plurality of cooling header units for supplying cooling fluid to the material at different positions,
The plurality of cooling header units may include:
And a cooling fluid is supplied to the material before the material contacts the finishing roll within a range of the wiper device.
The method according to claim 1,
The wiper device
A device frame disposed after the finishing rolling roll in the material traveling direction;
A wiper member provided on the apparatus frame; And
And a cooling fluid supply unit that is provided in the apparatus frame or the wiper member and supplies the largest amount of cooling fluid at a position farthest away from the finishing rolling roll and supplies the smallest amount of cooling fluid at a position closest to the finishing rolling roll The cooling header unit;
The rolling apparatus comprising:
3. The method of claim 2,
The wiper device
Wherein at least one of a distance from the cooling header unit to the finishing rolling roll or the material and an angle formed by the cooling header unit with the material is adjusted so that the cooling fluid supplied to the material is overlapped the cooling header adjustment unit prevents the cooling header adjustment unit from overlapping.
Further comprising:
The method of claim 3,
The cooling header adjustment unit includes:
A distance adjusting unit, connected to the cooling header unit, for moving the cooling header unit along the wiper member to vary a distance from the cooling header unit to the finishing roll or the material; And
An angle regulating unit connected to the apparatus frame or the wiper member for rotating the apparatus frame or the wiper member to adjust an angle formed by the cooling header unit with the workpiece;
The rolling apparatus comprising:
5. The method of claim 4,
The cooling header unit includes:
A plurality of cooling pipes provided on the wiper member to face the material and spaced apart from each other by a predetermined distance; And
A cooling nozzle provided in the cooling pipe and having a plurality of nozzles in a width direction of the material;
The rolling apparatus comprising:
6. The method of claim 5,
The distance adjustment unit
A moving frame for supporting or fixing the cooling pipe;
A moving rail provided on the moving frame and the wiper member; And
Power transmission means connected to the moving frame or the cooling pipe for moving the moving frame or the cooling pipe along the moving rail;
The rolling apparatus comprising:
The method according to claim 6,
The power transmitting means includes:
A screw housing provided in the moving frame; And
A screw member connected to a rotary shaft of a motor connected to the encoder and connected to the screw housing;
Wherein the rolling apparatus comprises:
6. The method of claim 5,
Wherein the angle adjusting unit comprises:
And an angle adjusting motor in which a rotary shaft is connected to the apparatus frame or the wiper member, and the apparatus frame or the wiper member is rotated by the angle adjusting motor to adjust an angle formed by the jet port of the cooling nozzle with the material Rolling mill.
9. The method of claim 8,
The wiper device
A sensing unit provided on at least one of the apparatus frame, the wiper member, and the cooling pipe, the sensing unit being electrically connected to the control means;
Further comprising:
10. The method of claim 9,
The sensing unit includes:
An angle sensor provided on the apparatus frame or the wiper member; And
A distance sensor provided in the cooling pipe;
Wherein the rolling apparatus comprises:
11. The method according to any one of claims 1 to 10,
An outgoing cooling device provided on the exit side of the finishing rolling roll for supplying a cooling fluid to the finishing rolling roll;
Further comprising:
12. The method of claim 11,
Characterized in that the material is a material comprising at least one of heavy carbon steel (carbon weight 0.08% to 0.3%), high carbon steel (carbon weight 0.3% or more) and niobium (Nb) added steel.
A rough rolling step of pressing the material by the rough rolling device;
An inlet side cooling step of supplying a cooling fluid to the material at an inlet side of a finishing rolling roll of a finishing rolling apparatus;
A scarification rolling step of pressing the material with the finishing rolling roll after the inlet cooling step or the inlet cooling step; And
And an outgoing 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 or after the finishing rolling step,
The in-
Wherein the cooling fluid is supplied to the material before the material contacts the finishing rolling roll.
14. The method of claim 13,
The in-
A cooling fluid is supplied to a plurality of cooling pipes spaced apart from each other by a different distance from the finishing rolling roll so as to supply the greatest amount of cooling fluid at the farthest distance from the finishing rolling roll, Wherein the cooling fluid is supplied in the smallest amount of cooling fluid.
15. The method of claim 14,
The in-
A nozzle adjusting step of changing the position of the nozzle supplying the cooling fluid or rotating the nozzle;
Wherein the rolling is performed in a rolling direction.
16. The method of claim 15,
Wherein the nozzle adjustment step comprises:
And changing a distance from the nozzle to the finishing rolling roll or the work or changing an angle formed by the nozzle with respect to the work.
17. The method according to any one of claims 13 to 16,
The in-
The temperature of the material including at least one of medium carbon steel (0.08% to 0.3% by weight of carbon), high carbon steel (at least 0.3% by weight of carbon) and niobium (Nb) And the cooling fluid is supplied to the material.

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