KR102329511B1 - Apparatus and method for rolling - Google Patents

Abstract

The present invention relates to a rolling equipment and a rolling method.
A rolling facility according to the present invention includes a rough rolling device having a rough rolling roll for pressing a material to be conveyed; and a finishing rolling roll provided in the conveying path of the material to press the material passing through the rough rolling apparatus a finishing rolling device; and a wiper device provided at the mouth of the finishing rolling roll to grind a 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 includes: a plurality of cooling header units for supplying a cooling fluid to the material at different positions; Including, the plurality of the cooling header unit may supply a cooling fluid to the material before the material comes into contact with the finishing roll within the scope of the wiper device.

Description

Rolling equipment and rolling method {APPARATUS AND METHOD FOR ROLLING}

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 perform rough rolling, and then finish rolling in the finishing mill 30, finishing mill. , after cooling in the run-out table (40, Run Out Table), it can be carried out by winding in the form of a coil in the winding device (50).

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

However, since the work roll used in such a hot rolling process repeatedly comes into contact with a high-temperature slab or steel sheet, it is inevitable to consider the amount of heat input from the high-temperature slab or steel sheet.

When the work roll is exposed to high temperature for a long time, it is in a state of 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. will cause partial or complete peeling. In this way, when mill scale is peeled off the surface of the rolling roll, spindle-type scale and sand-type scale are generated on the surface of the product, thereby reducing the quality of the product.

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

However, depending on the distance at which the nozzle that sprays the coolant on the work roll is spaced apart from the rolling roll, a problem in which the coolant is concentrated in a large amount in a specific area of the work roll may occur.

In addition, cooling only the work roll that repeatedly comes into contact with a high-temperature steel sheet may cause a decrease in cooling efficiency.

KR 10-0406372 B1 (2003.11.07)

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

Another object of the present invention is 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 material.

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

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

A rolling facility according to the present invention includes a rough rolling device having a rough rolling roll for pressing a material to be conveyed; and a finishing rolling roll provided in the conveying path of the material to press the material passing through the rough rolling apparatus a finishing rolling device; and a wiper device provided at the mouth of the finishing rolling roll to grind a 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 includes a device frame arranged to follow the finishing rolling roll in the moving direction of the material; and , a wiper member provided in the device frame; and provided in the device frame or the wiper member, the largest amount of cooling fluid is supplied at a position farthest from the finishing rolling roll, and the smallest amount of cooling fluid is supplied at a position closest to the finishing rolling roll. and a plurality of cooling header units, wherein the plurality of cooling header units may supply a cooling fluid to the material before the material comes into contact with the finishing roll within the scope of the wiper device.

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 roll or the material and an angle formed by the cooling header unit with the material to adjust the material. It may further include a; cooling header control unit for preventing the cooling fluid supplied to the overlap (overlap).

More preferably, the cooling header control unit is connected to the cooling header unit and moves the cooling header unit along the wiper member to change the distance from the cooling header unit to the finishing roll or the material. unit; 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.

More preferably, the cooling header unit may include 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 provided with 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; and 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.

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

More preferably, the angle adjusting unit includes a motor for adjusting an angle in which a rotating shaft is connected to the device frame or the wiper member, and by rotating the device frame or the wiper member by the angle adjusting motor, the cooling nozzle The angle formed by the injection hole with 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 the control means.

More preferably, the sensing unit includes: an angle sensor provided on the device frame or the wiper member; and a distance sensor provided in the cooling pipe.

More preferably, an exit side cooling device 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 (0.08% to 0.3% carbon weight), high-carbon steel (carbon weight 0.3% or more), and niobium (Nb)-added steel.

On the other hand, the present invention as another aspect is a method of rolling a material with a rolling facility, a rough rolling step of pressing the material with a rough rolling device; and supplying a cooling fluid to the material from the inlet side of the finishing roll of the finishing rolling device an entrance cooling step; and a finishing rolling step of pressing the material with the finishing roll after the entrance cooling step or during the entrance 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; A cooling fluid is supplied to the material before it comes into contact with the finishing roll, and the cooling fluid is supplied to a plurality of cooling pipes spaced apart from the finishing roll by different distances, but at a place farthest from the finishing roll. Provided is a rolling method in which the largest amount of cooling fluid is supplied, and the smallest amount of cooling fluid is supplied at a location closest to the finishing rolling roll.

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

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

More preferably, in the entrance cooling step, the temperature of the material comprising 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 (Nb) added steel is The cooling fluid may be supplied to the material so as to be in the range of 850°C or higher and 900°C or lower.

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According to the present invention, there is an effect of increasing the life of the work roll and extending the replacement cycle of the work roll.

In addition, it is possible to prevent the quality of the rolled product from being deteriorated due to the rapid cooling of the material, and it is possible to increase the cooling efficiency of the material and the work roll.

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

1 schematically shows a typical rolling process.
2 schematically shows a rolling process according to the present invention.
3 schematically shows a rolling facility according to the present invention.
4 schematically shows a cooling pipe according to the present invention.
5 is a perspective view of a wiper device according to the present invention.
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 present invention.
Figure 9 shows the physical properties of the material rolled by the present invention.

In order to help the understanding of the description of the embodiment of the present invention, the elements indicated by the same reference numerals in the accompanying drawings are the same elements, and the related elements among the elements that perform the same operation in each embodiment are the same or extended numbers. marked.

In addition, in order to clarify the gist of the present invention, descriptions of elements and techniques well known by the prior art will be omitted, and below, 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 presented embodiment, and certain components may be proposed in other forms with addition, change, or deletion by those skilled in the art, but this is also included within the scope of the same spirit as the present invention make it clear

Hereinafter, a case in which cooling water is used as the cooling fluid will be described as an example, but the type of the 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 FIG. 2, the rolling equipment 100 according to the present invention includes a rough rolling device 110 having a rough rolling roll 111 for pressing the material 1 to be transferred, and a transfer path of the material. A finishing rolling device 120 provided with a finishing rolling roll 121 provided to press the material passing through the rough rolling device, and a finishing rolling device provided at the mouth of the finishing rolling roll to polish the surface of the finishing rolling roll, and It may include a wiper device 140 for supplying a cooling fluid to the material, and a cooling device 130 provided on the transfer path of the material to cool the material passing through the finishing rolling device.

In this case, the cooling device 130 may be a run-out table. In addition, the wiper device 140 may be provided on all of the finishing rolls 121 provided in the material 1 transport path, or may be provided only on the finishing rolls 121 at any one position, which is the present invention. It is not limited by the rolling conditions, etc., it is a matter that can be appropriately selected and applied by those skilled in the art.

In addition, as shown in FIG. 3 , an inlet cooling unit 60 is provided at the inlet side of the finishing rolling roll 121 to supply cooling water to the finishing rolling roll 121 , and outlet cooling is provided at the exit side of the finishing rolling roll 121 . A unit 70 is provided to supply cooling water to the finishing roll 121 .

At this time, the wiper device 140 provided under the inlet cooling unit 60 is in contact with the surface of the finishing roll 121 . In addition, the wiper device 140 grinds the surface of the finishing roll when the surface of the finishing roll is worn or damaged by foreign substances, thereby eliminating the need for a separate finishing rolling roll replacement operation, thereby increasing process efficiency. have.

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

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, and the cooling pipe 233 is most suitable for the finishing rolling roll 121. A first cooling pipe (233a) disposed close, a third cooling pipe (233c) 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 therebetween.

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 characteristics and working environment.

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

At this time, as the cooling pipe 233 is spaced apart from the finishing rolling roll or the material by a certain distance, the cooling nozzle 333 is present at a predetermined position from the finishing rolling roll or the material, and from the cooling nozzle 333 to the material surface. Up to is the first injection distance d1, and from the cooling nozzle 333 at another position to the surface of the material is the second injection distance d2.

At this time, if the first and second injection distances are compared, the first injection distance d1 is shorter than the second injection distance d2. Through this, the closer the cooling pipe 233 is disposed to the finishing roll or the material, the greater the injection distance. It can be seen that the shorter

It can be seen that the second injection distance d2 becomes longer as the cooling pipe 233 is spaced farther from the finishing roll or the material, and in this case, the overlap region ( R) can be seen.

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

Accordingly, the present invention provides a wiper device capable of improving such a problem, uniform cooling water supply, and improving cooling efficiency of a material and a finishing roll.

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

The wiper device 140 according to a preferred embodiment of the present invention includes a device frame 141 arranged to follow the finishing roll 121 in the moving direction of the material 1 .

The thickness of the material before being drawn into the finishing roll 121 is thicker than the thickness of the material after being drawn into the finishing roll 121. And, the thickness of the material is thinner than the inlet side is called the exit side.

In this case, 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 may be appropriately changed and applied by those skilled in the art.

A cooling header unit 143 may be provided on the device 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 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 , but hereinafter, the cooling header unit 143 is provided in the wiper member 142 as an example. let me explain

However, this is for clarity of explanation, not intended to limit the present invention, and the location at which the cooling header unit 143 is provided can be appropriately selected by those skilled in the art.

In addition, if the cooling header unit 143 is provided on the device frame 141 or the wiper member 142 at the entrance of the finishing roll, the space of the rolling mill can be efficiently utilized. Therefore, according to the present invention, it is possible to construct a cooling header unit applicable to the actual rolling mill space, as well as to construct a suitable cooling header unit in the actual rolling mill space.

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

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

Therefore, in the present invention, the cooling header unit 143 supplies cooling water directly to the surface of the material 1 to cool the surface of the material at the entrance of the finishing roll to below a critical point. In this method, the surface of the material can be cooled more efficiently than the method of supplying cooling water to the finishing roll or the finishing roll gap, and furthermore, the finishing rolling roll can be efficiently cooled.

In addition, there is an effect of preventing defects on the surface of the material caused by non-uniform cooling of the material and the finishing roll.

And, as described above, the cooling header control unit ( 144 of FIG. 7) may be provided.

On the other hand, the cooling header unit may be provided in plurality at the lower portion of the wiper member, supplying the largest amount of cooling fluid at the position furthest away from the finishing rolling roll, and supplying the largest amount of cooling fluid at the position closest to the finishing rolling roll. It may be provided to supply the smallest amount of cooling fluid.

According to the cooling header unit provided in this way, it is possible to prevent the temperature of the material 1 from rapidly changing before entering the finishing rolling roll 121 . That is, the material 1 is cooled by supplying the smallest amount of cooling fluid from the third cooling pipe 233c farthest from the finishing roll 121, and the third cooling pipe from the second cooling pipe 233b ( 233c) is supplied to cool the material 1, and when the largest amount of cooling fluid is supplied through the first cooling pipe 233a placed just before the finishing roll 121, the finishing rolling roll It is possible to prevent brittleness caused by the rapid cooling of the material before it is drawn into (121), thereby contributing to the improvement of formability.

In particular, this effect is further maximized when the material 1 is a material containing at least one of medium carbon steel (0.08% to 0.3% carbon weight), high carbon steel (carbon weight 0.3% or more), and niobium (Nb) added steel. can be

More preferably, by controlling the amount of cooling water supplied to the cooling pipe so that the temperature of the material before it enters the finishing rolling roll 121 is in the range of 850°C or more and 900°C or less, the formability of the material 1 can be maximized. have.

This is, as shown in FIG. 9, 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 (Nb) added steel. When the material temperature is between 850℃ and 900℃, the hardness of Hematite (ferrous oxide; Fe ₂ O ₃ ) and Magnetite (ferric oxide; Fe ₃ O ₄ ) is stronger than that of the finishing roll. As the fraction increases, it causes mill scale exfoliation, which is a surface defect, so keeping the surface temperature of the material at 850°C or higher and 900°C or lower is very effective in improving quality.

To this end, 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 is also a matter that can be selected and applied by those skilled in the art.

As described above, the sudden drop in the surface temperature of the material causes a temperature drop in the entire thickness direction of the material, which adversely affects the rolling passability. Cooling down is very important.

Accordingly, the material 1 can be optimally cooled by adjusting the distance and angle of the cooling pipe 233 through the cooling header control unit 144 .

The cooling header control unit may change the distance from the cooling nozzle 333 to the surface of the material 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 surface of the material.

According to the cooling header control unit 144 provided in this way, it is possible to adopt an appropriate position of the cooling pipe 233 according to the rolling conditions, and accordingly, it is possible to prevent the cooling water supplied from a plurality of cooling nozzles from overlapping, and the cooling water There is an effect of removing the overlapping area, which is the overlapping area.

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

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

On the other hand, 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 ( A moving rail 242 may be provided between the 142 .

Preferably, the moving rail 242 may be provided as an LM guide, but this is not necessarily limited by 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 there is an effect that can implement the stable movement of the cooling pipe 233. .

The distance adjusting unit 343 for moving the cooling pipe 233 on the wiper member 142 is provided in the moving frame 241 for supporting or fixing the cooling pipe 233, the moving frame and the wiper member 142. It may include a moving rail 242 and a power transmission 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 member connected to the rotation shaft of the motor 246 connected to the screw housing 244 and the encoder 247 provided in the power transmission means 243, is connected to the screw housing 244 and passes through the inside of the screw housing (245).

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 there is an effect that can prevent the screw member 245 from sagging due to a load.

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

The screw member 245 may have a screw thread protruding from the outer periphery, 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, and as it is provided to perform a linear motion, the moving frame 241 connected to the screw housing 244 is a moving rail. It can move in a straight line along (242).

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

When the moving frame 241 moves, the cooling pipe 233 moves, and the distance the cooling pipe 233 moves may be sensed by the encoder 247 . The encoder 247 may detect the number of rotations of the motor 246 and calculate the straight movement distance, preferably this may be performed more efficiently 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, the distance at which the cooling pipe 233 is spaced apart from the surface of the material 1 can be adjusted. Therefore, by adjusting the position of the cooling pipe 233 using this, the injection distance of the cooling water can be adjusted. It is possible to prevent an overlap region (R in FIG. 4 ) from being generated.

In this case, the cooling pipe 233 may be provided to be individually controlled, but this is selectable by those skilled in the art and is not necessarily limited by the present invention.

Meanwhile, the present invention provides the sensing unit 145 shown in FIG. 6 . The moving distance and position of the cooling pipe 233 may be detected 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 angle θ at which the cooling nozzle 333 of the cooling pipe 233 sprays the cooling water may be adjusted. The angle θ at which the coolant is sprayed may be adjusted by rotating the wiper device 140 , specifically, the wiper member ( 142 in FIG. 5 ) or the device frame ( 141 in FIG. 5 ) by a predetermined angle.

In addition, the angle θ at which the coolant is sprayed may be detected by an 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 material (1) is h, the injection distance (d) is as shown in [Equation 1] below.

[Formula 1]

The thickness of the raw material 1 is set before the raw material 1 is drawn into the finishing roll 121 , and the value of the angle θ at which the cooling water is sprayed by the angle sensor 255 can be known. At this time, the optimal spraying distance at which the coolant overlap region does not occur may be a value derived in advance. The coolant spraying angle θ does not change after the initial setting when the diameter of the finishing roll 121 and the target material are determined. be the value

Therefore, it is possible to move the cooling pipe to an optimal injection distance in which an overlap area does not occur through the distance adjustment unit 343 of the present invention, and to inject the cooling water initially determined through the angle adjustment unit (350 in FIG. 7 ). The device frame or wiper member can be rotated to form an angle θ.

That is, if 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 optimal injection distance (d opt ) is as shown in [Equation 2] below.}

[Formula 2]

At this time, in the case where each cooling pipe is provided such that the distance and angle are collectively changed, the [Equation 1] and [Equation 2] may be calculated based on the first cooling pipe 233a, and each cooling pipe When the distance and protractor are individually provided to be changed, the [Equation 1] and [Equation 2] can be applied individually for each cooling pipe, and the injection distance and the injection angle can also be calculated separately from each cooling pipe. have.

Hereinafter, the configuration for adjusting the angle θ at which the coolant is sprayed will be described in detail with reference to FIG. 7 . The angle θ at which the coolant is sprayed is connected to the device frame 141 or the wiper member 142. By rotating the device frame or the wiper member, the cooling header unit 143 may be adjusted by the angle adjusting unit 350 which adjusts the angle formed with the surface of the material 1 .

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

The angle adjusting unit 350 may include a motor 351 for adjusting the angle of which the rotating shaft is connected to the device frame. At this time, the encoder 352 may also be connected to the angle adjustment motor 351 .

Preferably, the device frame 141 is also provided with an angle sensor to detect the rotational state and angle. have.

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

Accordingly, the operator can adjust the angle θ at which the cooling nozzle 333 sprays the coolant on the surface of the material 1 according to the same principle. may be more effective in preventing

On the other hand, the present invention as another aspect, as shown in FIG. 8, is a method of rolling a material with a rolling equipment, a rough rolling step (S610) of pressing the material with a rough rolling apparatus, and the Inlet cooling step (S620) of supplying a cooling fluid to the material, and finishing rolling step (S630) of pressing the material with the finishing roll after or during the entrance cooling step (S630) and after the finishing rolling step or the finishing During the rolling step, an exit cooling step (S640) of supplying a cooling fluid to the finishing rolling roll and the material at the exit side of the finishing rolling roll is included, wherein the inlet cooling step is performed before the material comes into contact with the finishing rolling roll. To provide a rolling method for supplying a cooling fluid to the material.

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

The above has been described with respect to one embodiment of the present invention, the scope of the present invention is not limited thereto, and various modifications and variations are possible within the scope 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.

100: rolling equipment 110: rough rolling equipment
111: rough rolling roll 120: finishing rolling device
121: finishing rolling roll 130: cooling device
140: wiper device 141: device frame
142: wiper member 143: cooling header unit
144: cooling header control unit 145: detection unit
233: cooling pipe 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 adjustment unit 351: angle adjustment motor
352: encoder 355: distance sensor

Claims (17)

a rough rolling device having a rough rolling roll for pressing the material to be transferred;
a finishing rolling apparatus provided in the conveying path of the material and having a finishing rolling roll for pressing the material passing through the rough rolling apparatus;
a wiper device provided at the mouth of the finishing roll to grind the surface of the finishing 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 that has passed through the finishing rolling device; including,
The wiper device is
an apparatus frame arranged to follow the finishing rolling roll in the moving direction of the material;
a wiper member provided on the device frame; and
It is provided on the device 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. Includes a plurality of cooling header units;
A plurality of the cooling header units,
A rolling facility for supplying a cooling fluid to the material before the material comes into contact with the finishing roll within the range of the wiper device.
delete According to claim 1,
The wiper device is
It is connected to the cooling header unit and adjusts at least one of a distance from the cooling header unit to the finishing roll or the material and an angle formed by the cooling header unit with the material so that the cooling fluid supplied to the material overlaps ( overlap) cooling header control unit to prevent;
Rolling facility, characterized in that it further comprises.
4. 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 change a distance from the cooling header unit to the finishing 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;
A rolling facility comprising a.
5. The method of claim 4,
The cooling header unit,
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 provided with a plurality of cooling nozzles in the width direction of the material;
A rolling facility comprising a.
6. The method of claim 5,
The distance adjusting unit,
a moving frame for 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;
A rolling facility comprising a.
7. The method of claim 6,
The power transmission means,
a screw housing provided in the moving frame; and
a screw member connected to the rotation shaft of the motor connected to the encoder and connected to the screw housing;
A rolling facility comprising a.
6. The method of claim 5,
The angle adjustment unit,
and a motor for adjusting an angle in which a rotating shaft is connected to the device frame or the wiper member, and by rotating the device frame or the wiper member by the angle adjusting motor, the angle formed by the nozzle of the cooling nozzle with the material is adjusted rolling equipment.
9. The method of claim 8,
The wiper device is
a sensing unit provided in at least one of the device frame, the wiper member, and the cooling pipe and electrically connected to the control means;
Rolling facility, characterized in that it further comprises.
10. The method of claim 9,
The sensing unit is
an angle sensor provided on the device frame or the wiper member; and
a distance sensor provided in the cooling pipe;
A rolling facility comprising a.
11. The method of any one of claims 1, 3 to 10,
an exit side cooling device provided on the exit side of the finishing rolling roll and supplying a cooling fluid to the finishing rolling roll;
Rolling facility, characterized in that it further comprises.
12. The method of claim 11,
The material is a rolling facility, characterized in that the material comprises 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 (Nb) added steel.
a rough rolling step of pressing the material with a rough rolling device;
Inlet cooling step of supplying a cooling fluid to the material at the inlet side 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 entrance cooling step or during the entrance 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;
The inlet cooling step is
A cooling fluid is supplied to the material before the material comes into contact with the finishing roll, and the cooling fluid is supplied to a plurality of cooling pipes spaced apart from each other by different distances from the finishing roll, but furthest from the finishing roll. A rolling method in which the largest amount of cooling fluid is supplied at a space that is spaced apart and the smallest amount of cooling fluid is supplied at a place closest to the finishing rolling roll.
delete 14. The method of claim 13,
The inlet cooling step is
a nozzle adjustment step of changing a position of a nozzle for supplying a cooling fluid or rotating the nozzle;
A rolling method comprising a.
16. The method of claim 15,
The nozzle adjustment step is
A rolling method, characterized in that it is performed by changing the distance from the nozzle to the finishing roll or the material or by changing the angle the nozzle forms with respect to the material.
17. The method of any one of claims 13, 15 and 16,
The inlet cooling step is
So that the temperature of the material containing at least one of medium-carbon steel (0.08% to 0.3% carbon weight), high-carbon steel (carbon weight 0.3% or more) and niobium (Nb)-added steel is in the range of 850°C to 900°C A rolling method, characterized in that supplying a cooling fluid to the material.

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