KR20150075486A - Apparatus for continuous annealing furnace and control method thereof - Google Patents

Abstract

Disclosed are a continuous annealing facility and a control method thereof. The continuous annealing facility includes: a fixating roll; at least one rotation roll placed on a path where a steel plate is guided by the fixating roll to rotate in the transfer direction of the steel plate; and a foreign substance removal device to remove foreign substances adhering to at least one rotation roll by selectively coming in contact with the rotation roll. According to the present invention, the continuous annealing facility removes foreign substances adhering to the rotation roll.

Description

[0001] APPARATUS FOR CONTINUOUS ANNEALING FURNACE AND CONTROL METHOD THEREOF [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous annealing apparatus and a control method thereof, and more particularly to a foreign matter removing apparatus capable of removing foreign matter adhered to a rotating roll in a continuous annealing apparatus.

The process of producing steel sheets among steel products consists of annealing annealing after steel making, steelmaking, hot rolling and cold rolling in sequence. The cold-rolled steel sheet is deformed due to work hardening, and therefore, it is necessary to heat-treat the steel sheet in order to use the steel sheet as a product. The annealing heat treatment is to heat the steel sheet at a high temperature to soften the internal deformed structure of the steel sheet and to heat the steel sheet at a temperature of about 800 ° C or higher, which is not lower than the recrystallization temperature of the steel sheet, for a certain period of time. The steel sheet has different mechanical properties such as yield strength, hardness and elongation of the steel sheet depending on annealing heat treatment conditions. Therefore, the annealing heat treatment can determine the mechanical properties of the final product of the steel sheet and is one of the important processes in the steel manufacturing process.

Each zone of the continuous annealing furnace undergoing the continuous annealing process is divided into a preheating section, a heating section, a soaking section, a standing section Slow Cooling Section, Rapid Cooling Section, Over Aging Section, and Final Cooling Section to serve as heating and cooling.

The present invention relates to a continuous annealing apparatus provided with a foreign matter removing device capable of removing foreign matter adhered to a rotating roll in a continuous annealing facility and a control method thereof.

According to an embodiment of the present invention, there is provided a continuous annealing apparatus including: a stationary roll; At least one rotary roll located on a path through which the steel sheet is guided by the stationary roll and rotating in the conveying direction of the steel sheet; And a foreign matter removing device for selectively removing at least one of the at least one rotating roll and removing the foreign matter adhered to the at least one rotating roll.

Wherein the foreign material removing device includes a knife portion contacting the surface of the at least one rotating roll that contacts the guide portion and a guide portion guiding the movement path of the foreign matter removed from the at least one driven roller by the contact between the knife portion .

The foreign substance removing apparatus may further include a foreign matter storing unit for storing foreign matter dropped from the guide unit and discharging the foreign matter to the outside at a predetermined cycle.

The foreign material removing device may include an inclined surface formed in the other direction from one direction, and the foreign material falling on the foreign material removing device may be discharged to the outside along the inclined surface together with the injected fluid.

The foreign matter removing device may contact the at least one rotating roll in accordance with a predetermined period.

The steel sheet may be conveyed in contact with at least one of the stationary roll and the at least one stationary roll.

At least a portion of the radius of the at least one rotating roll may overlap the radius of the fixed roll.

According to another aspect of the present invention, there is provided a control method for continuous annealing equipment, including moving a foreign material removing device to contact a surface of at least one rotating roll; And discharging the foreign matter removed from the at least one rotating roll by the contacting foreign material removing device to the outside based on a predetermined period.

The discharging step may include sensing the amount of the foreign matter accumulated in the foreign matter storing part included in the foreign matter removing device, and injecting the fluid into the foreign matter receiving part according to the amount of the foreign matter.

The moving step may be performed based on at least one of a predetermined amount of foreign matter adhered to the at least one rotating roll detected and a predetermined period.

The continuous annealing equipment and the control method thereof according to the present invention have the effect of removing foreign matter adhered to the rotating roll in the continuous annealing equipment.

1 is a view showing a continuous annealing facility according to an embodiment of the present invention.
Fig. 2 is a view showing a roll in the continuous annealing equipment of Fig. 1;
Figs. 3 to 5 are diagrams showing foreign matter movement in the roll of Fig. 2; Fig.
FIG. 6 is a view showing a foreign matter removing method of the foreign material removing apparatus operating in the roll of FIG. 2;
Figure 7 is a perspective view of a debris removal device operating in the roll of Figure 2;
FIG. 8 is a view showing a method of discharging foreign matter removed in the roll of FIG. 2;
Fig. 9 is a view showing the operation of the foreign material removing apparatus operating in the roll of Fig. 2;
FIG. 10 is a flow chart showing an operation process of the foreign material removing apparatus operating in the roll of FIG. 2;

The above objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. It is to be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. Like reference numerals designate like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Further, numerals (e.g., first, second, etc.) used in the description process of this specification are only an identifier for distinguishing one component from another component

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

1 is a view showing a continuous annealing facility according to an embodiment of the present invention.

Referring to FIG. 1, in a cold rolled steel sheet manufacturing process, a cold rolled steel strip by a cold mill (RCM) 11 is rewound by a payoff reel 12 Is welded by a welder (13).

Next, the steel sheet is removed from the Entry Looping Tower (ELT) 15 of the Continuous Annealing Line (CAL) 16 after the pollutants are removed through the Electrolytic Cleaning Line (ECL) Wait for a while to secure welding time. That is, the steel sheet remains in the ELT 15 for a predetermined period of time while welding the steel sheet at the entrance side of the continuous annealing facility 16. [ The upper carriage in the ELT 15 moves up and down to adjust the amount of steel sheet stored in the ELT 15 to supply the steel sheet to the inlet side of the continuous annealing facility 16. [

The steel sheet is subjected to the continuous annealing process while passing through the continuous annealing facility 16. [

The annealing furnace of the continuous annealing equipment 16 is heated by heating including a preheating section (PHS) 21, a heating section (HS) 22, a soaking section (SS) 23, (SCS) 24, a Rapid Cooling Section (RCS) 25, an Over Aging Section (OAS) 26, a Final Cooling Section, FCS) 27, and the like.

The preliminary stage 21 preheats the steel sheet input to the entrance side of the annealing furnace using the exhaust gas generated by the fuel combustion in the heating stand 22 and the heating stage 22 conveys the steel sheet passing through the preheating stage 21 And the temperature is raised.

The steel plate passed through the heating stand 22 is then subjected to cracking at a constant temperature in the crack base 23 and slowly cooled through circulation cooling of the atmospheric gas while passing through the cold base 24.

The steel plate passed through the stationary cold bar 24 is quenched by the main gas jet, the cooling roll, the auxiliary gas jet or the like in the cold bar 25, overexposed at the overcome bar 26, And finally cooled.

On the other hand, the steel sheet after passing through the continuous annealing equipment 16 stays in the DLT (Delivery Looping Tower) 17 for a predetermined time to secure the winding time in the winding reel (TR)

Next, the steel sheet is rough-rolled through a skin pass mill (SPM) 18, and is wound on a product-by-product basis in the winder 20 after the welded portion is cut again by the cutter 19.

Fig. 2 is a view showing a roll in the continuous annealing equipment of Fig. 1;

As shown, the continuous annealing facility 16 according to an embodiment of the present invention includes a stationary roll FR, at least one rotating roll R1 to R3, and a debris removing device 60 .

The stationary roll FR may be a roll for guiding the steel plate 30 conveyed in the continuous annealing facility 16. [ A plurality of fixed rolls (FR) may be provided in the continuous annealing facility (16) at a certain distance from each other. The steel plate 30 to be fed from a plurality of spaced apart fixed rolls FR is located below the fixed roll FR in the specific fixed roll FR and is located below the fixed roll FR in the other fixed roll FR. Can be located on the upper side. That is, it means that the steel plate 30 can be processed by being moved between the upper side and the lower side of the fixed roll FR alternately. The fixed roll FR may be fixed. That is, it means that the steel plate 30 can be guided without rotating at the installed point.

The rotary rolls R1 to R3 may be located on the outer peripheral side of the fixed roll FR. At least a part of the rotating rolls R1 to R3 located on the outer peripheral side of the fixed rolls FR can overlap the radius of the fixed rolls FR. For example, it means that at least a part of the rotary rolls R1 to R3 can be positioned inside the fixed rolls FR. A part of the rotary rolls R1 to R3 and / or the fixed rolls FR protruding from the surface of the stationary roll FR can be brought into contact with the conveyed steel plate 30, have.

The rotating rolls R1 to R3 can rotate. The direction of rotation of the rotating rolls R1 to R3 may correspond to the direction in which the steel plate 30 is fed. For example, the rotating rolls R1 to R3 rotate in the machine direction, which means that the steel plate 30 can be fed.

The number of the rotating rolls R1 to R3 may be plural. For example, it means that the plurality of rotary rolls R1 to R3 can be spaced a certain distance from the outer circumferential side of the fixed roll FR. The plurality of rotating rolls R1 to R3 may include first to third rotating rolls R1 to R3. For example, the second and third rotary rolls R2 and R3 may be disposed around the first rotary roll R1.

The foreign material removing device 60 may selectively contact at least one of the at least one rotating rolls R1 to R3 to remove foreign matters adhered to the rotating rolls R1 to R3.

The foreign matter may be a substance dropped into the continuous annealing facility 16 during the process. The foreign substance may be a substance containing iron powder. The foreign matter falling into the continuous annealing equipment 16 can be adhered to the steel sheet 30 and / or the rotating rolls R1 to R3 to be conveyed. In the case where foreign matter adheres to the rotating rolls R1 to R3, a rotation of the rotating rolls R1 to R3 may cause dent defects in which the steel plate 30 is periodically scratched. Since such a defect occurs inside the continuous annealing facility 16, it may take a considerable time to detect and take corrective action once a defect occurs. The foreign matter removing device 60 according to the embodiment of the present invention can reduce the defective rate of the steel plate 30 that has been completed by periodically and / or automatically removing the foreign substances attached to the rotating rolls R1 to R3 have.

The foreign material removing device 60 can operate based on the operation of the operator and / or the control signal by the control device. For example, the control device can monitor the state of the rotating rolls R1 to R3 and / or the steel plate 30 through a sensor such as a camera. When it is determined that a foreign substance has occurred, the control device can operate the foreign material removing device 60 to remove the foreign substance. The foreign material removing device 60 may include a roll contact portion 40 and a foreign matter storage portion 50.

The roll contact portion 40 may be a portion that substantially contacts the rotary rolls R1 to R3. The roll contact portion 40 contacts at least one of the rotating rotating rolls R1 to R3 to remove foreign matter adhering to the surfaces of the rotating rolls R1 to R3. The roll contact portion 40 may include a knife portion 42 and a guide portion 44. [

The knife portion 42 can contact the surfaces of the rotating rolls R1 to R3. The knife portion 42 may be a relatively sharp edge portion. For example, the knife portion 42 means that the two sides of the guide portion 44 can be formed to meet and be formed.

The guide portion 44 can guide the moving path of the foreign matter removed by the knife portion 42 that is in contact with the rotating rolls R1 to R3. That is, it means that the foreign matter removed from the rotating rolls R1 to R3 can serve to provide a path for moving to the foreign substance receiving portion 50. [

The foreign matter storage portion 50 may be a portion where the foreign matter removed by the roll contact portion 40 is received. The foreign substances collected in the foreign substance storage portion 50 can be removed to the outside when they accumulate more than a certain amount or when a certain period of time is reached.

The foreign substance storage portion 50 can also serve as a support for the stationary roll FR. For example, the foreign substance storage portion 50 means that it can be an axis of the fixed roll FR.

Figs. 3 to 5 are diagrams showing foreign matter movement in the roll of Fig. 2; Fig.

As shown in these drawings, the foreign substance removing apparatus 60 according to the embodiment of the present invention can effectively remove foreign matter that can scratch the steel plate 30. [

As shown in Figs. 3 and 4, the foreign substance 70 can be moved in accordance with the progress of the process. For example, the foreign matter 70 can be attached to the steel sheet 30 to be transferred and moved. The foreign substance 70 may be a piece of iron falling inside the continuous annealing facility 16 or the like.

As shown in Fig. 5, the foreign matter 70 attached to the steel plate 30 and moving may be attached to the first rotating roll R1. If the foreign matter adheres to the first rotating roll R1, it is possible to periodically scratch the steel plate 30 as the first rotating roll R1 rotates. Such a regular flaw may be a factor for lowering the merchantability of the finished steel plate 30. [

The foreign material removing device 60 can operate according to a constant cycle. For example, after the apparatus is operated for several hours, the deodorization apparatus 60 may be automatically operated.

The foreign material removing device 60 can be operated by a control signal of the control device. For example, if attachment of foreign matter is detected, it means that the control device can operate the foreign material removing device 60.

FIG. 6 is a view showing a foreign matter removing method of the foreign material removing apparatus operating in the roll of FIG. 2;

As shown in the figure, the foreign material removing apparatus 60 according to an embodiment of the present invention approaches the rotating rolls R1 to R3 to remove foreign matter. For example, it means that the foreign substance 70 attached to the first rotating roll R1 can be removed by contacting the first rotating roll R1. The removed foreign matter 70 may be moved along the guide portion 44 and then stacked in the foreign matter containing portion 50.

Figure 7 is a perspective view of a debris removal device operating in the roll of Figure 2;

As shown, the foreign material removing apparatus 60 according to an embodiment of the present invention can contact the outer peripheral surface of the rotating first rotating roll R1.

The control device can move the roll contact portion 40 up and down. That is, as described above, the roll contact portion 40 may be moved based on a predetermined period and / or a sensed value so that the knife portion 42 is brought into contact with the outer periphery of the first rotary roll R1.

The foreign matter that has come into contact with the knife portion 42 can be removed from the first rotating roll R1 and moved along the guide portion 44 and then dropped.

FIG. 8 is a view showing a method of discharging foreign matter removed in the roll of FIG. 2;

As shown in the figure, the foreign substance removing apparatus 60 according to the embodiment of the present invention can discharge the foreign substances removed from the rotating rolls R1 to R3 to the outside of the apparatus.

As shown in the figure, the removed foreign matter can be accumulated in the foreign matter storage portion 50. [ If the foreign matter is accumulated in the foreign matter storage portion 50 to a certain degree, the accumulated foreign matter may be discharged to the outside. For example, it is possible to allow foreign substances accumulated by flowing fluid to the foreign substance storage portion 50 to be discharged to the outside together with the fluid.

The foreign substance storage portion 50 may be formed with an inclined surface. For example, the one end side bottom surface of the foreign substance storage portion 50 may be the first height, and the other end side bottom surface may be the second height. The second height may be a value greater than the first height. Due to the presence of the inclined surface, the foreign matter accumulated by the fluid can be easily removed. In addition, due to the presence of the inclined surface, the foreign matter that has fallen into the foreign substance storage portion 50 may be naturally discharged to the outside.

Fig. 9 is a view showing the operation of the foreign material removing apparatus operating in the roll of Fig. 2;

As shown therein, the foreign material removing apparatus 60 according to an embodiment of the present invention can be moved in first to third directions D1 to D3. For example, the control device can move the foreign material removing device 60 in the first to third directions D1 to D3 based on the degree of contamination sensed. Alternatively, the controller may sequentially move the foreign material removing apparatus 60 in the first to third directions D1 to D3 based on a predetermined period.

A plurality of foreign material removing devices 60 may be provided. For example, two or more dehumidifiers 60 may be provided to remove debris as required.

FIG. 10 is a flow chart showing an operation process of the foreign material removing apparatus operating in the roll of FIG. 2;

As shown in the figure, the controller of the continuous annealing system according to an embodiment of the present invention can perform a step S10 of detecting a foreign matter removal cycle.

The foreign matter removing period may be a preset period. That is, it means that it may be set at the time of production of the apparatus and / or by the operator of the apparatus to remove the foreign matter 70 at regular intervals.

The foreign matter removing period may be a period determined by the amount of foreign matter 70 attached. For example, when the number of attached foreign matters 70 is large, the period is short, and when there are few foreign substances 70 attached, it means that the period can be long.

When the foreign matter removal cycle arrives (S20), a step S30 of operating the knife section 42 may proceed. That is, it means that the control device can start the knife portion 42 to contact the rotary rolls R1 to R3.

The step S40 of sensing the storage amount of the foreign substance 70 may be performed.

The storage amount of the foreign substance 70 can be detected by various sensors including a camera.

If the stored amount of the foreign substance 70 is equal to or larger than the preset amount (S50), the step of discharging the stored foreign substances (S60) may proceed.

The discharge of the stored foreign matter can be proceeded by a method of injecting fluid into the foreign substance storage portion 50. [ The fluid injected into the foreign substance storage portion 50 moves along the inclined portion 52 and can be discharged to the outside together with the accumulated foreign matter 70.

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 and scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

40: roll contact portion 50: foreign matter receiving portion
60: Foreign body removing device

Claims (10)

Fixed roll;
At least one rotating roll located on a path through which the steel sheet is guided by the stationary roll and rotating in the conveying direction of the steel sheet; And
And a foreign matter removing device for selectively removing at least one of the at least one rotating rolls to remove foreign matter adhered to the at least one rotating roll. The method according to claim 1,
The foreign matter removing device includes:
A knife portion contacting the surface of the at least one rotating roll which is in contact with the knife portion,
And a guiding portion for guiding a moving path of the foreign matter removed from the at least one driven roller by contact with the knife portion. 3. The method of claim 2,
The foreign matter removing device includes:
Further comprising a foreign matter storage portion for storing the foreign matter dropped from the guide portion and discharging the foreign matter to the outside at a predetermined cycle. The method of claim 3,
The foreign matter removing device includes:
And an inclined surface formed in the other direction in one direction,
Wherein the foreign substance dropped onto the foreign material removing device is discharged to the outside along the inclined surface together with the injected fluid. The method according to claim 1,
The foreign matter removing device comprises:
And contact the at least one rotating roll in accordance with a predetermined cycle. The method according to claim 1,
In the steel sheet,
Wherein the at least one stationary roll is transported in contact with at least one of the stationary roll and the at least one stationary roll. The method according to claim 1,
At least a portion of the radius of the at least one rotating roll,
Wherein the fixed roll is overlapped with the radius of the fixed roll. Moving the foreign material removing device to contact the surface of at least one rotating roll; And
And discharging the foreign matter removed from the at least one rotating roll by the contacted foreign material removing device to the outside based on a predetermined cycle. 9. The method of claim 8,
Wherein said discharging comprises:
Sensing the amount of the foreign matter accumulated in the foreign matter containing portion included in the foreign matter removing device,
And injecting a fluid into the foreign matter storage portion according to the amount of the foreign matter. 10. The method of claim 8,
Wherein the moving comprises:
Wherein the control is performed based on at least one of a detected amount of foreign matter adhered to the at least one rotating roll and a preset period.

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