KR20220082425A - Furnace management system in continuous galvanizing line process and management method thereof - Google Patents

Abstract

A furnace management system for a continuous hot-dip galvanizing line process is disclosed. The heating furnace management system of the continuous hot-dip galvanizing line process performs an operation for removing foreign substances to remove the foreign substances present in the hearth roll provided in the heating furnace that heats the steel sheet transferred to the continuous hot-dip galvanizing line. control panel; and a control unit electrically connected to a motor driving unit for driving a motor connected to the hearth roll to transport the steel sheet while removing foreign substances by rotation of the hearth roll, wherein the control unit is configured to detect foreign substances present in the hearth roll from the quality defect inspection device. Upon receiving dent information by to determine a corresponding heart roll for removing foreign substances, and controlling the motor driving unit to alternately perform an acceleration operation and a deceleration operation on a corresponding motor connected to the determined heart roll.

Description

A heating furnace management system for a continuous hot-dip galvanizing line process and a management method therefor

The disclosed invention relates to a heating furnace management system for a continuous hot-dip galvanizing line process and a management method therefor, and more particularly, it is possible to prevent poor quality of a steel sheet material, thereby improving production yield, and preventing deterioration of driving parts. It relates to a furnace management system for a continuous hot-dip galvanizing line process and a method for managing the same.

In general, hot-dip galvanized steel sheet is produced by a continuous hot-dip galvanizing line (CGL) process.

In the continuous hot-dip galvanizing line process, the steel sheet that has passed through the payoff reel, the welding machine, and the looper is crushed with a scale breaker on the surface of the steel sheet, and the scale is removed by a pickling process including a pickling tank and a water washing tank, Heat treatment in a heating furnace, manufacturing an alloy-plated steel sheet through a plating bath, immersing the heat-treated steel sheet in the plating bath accommodated in the plating bath, adjusting the plating amount through gas wiping, and cooling the steel sheet through a cooling zone After that, the hot-dip galvanized steel sheet can be manufactured by passing through a skin pass, a tension leveler, and a post-processing facility.

However, when the heating furnace of the conventional continuous hot-dip galvanizing line process heats the steel sheet, if foreign substances are present in the hearth roll, it is difficult to find the hearth roll in which the foreign material is present, resulting in poor quality of the steel sheet material. yield had dropped.

And, since the heating furnace of the conventional continuous hot-dip galvanizing line process has to continuously turn on/off the motor driving unit for driving the motor connected to the hearth roll in order to remove foreign substances, a phenomenon of deterioration of the driving parts occurred.

For the above reasons, an aspect of the disclosed invention is to provide a heating furnace management system for a continuous hot-dip galvanizing line process capable of improving production yield by preventing poor quality of steel sheet material and a method for managing the same.

Another aspect of the disclosed invention is to provide a heating furnace management system for a continuous hot-dip galvanizing line process capable of preventing deterioration of driving parts, and a method for managing the same.

A heating furnace management system for a continuous hot-dip galvanizing line process according to an aspect of the disclosed invention is configured to remove foreign substances present in a hearth roll provided in a heating furnace for heating a steel sheet transferred to a continuous hot-dip galvanizing line. an operation unit for performing an operation for removing foreign substances; and a control unit electrically connected to a motor driving unit for driving a motor connected to the hearth roll to transport the steel plate while removing the foreign material by rotation of the hearth roll, wherein the control unit is configured to remove the foreign material from the hearth roll from the quality defect inspection device. When receiving dent information by foreign substances present in the roll, the operation unit controls the operation unit to perform a foreign material removal operation for the removal of the foreign material by the operation unit based on the received dent information, and the foreign material is removed When an operation is performed, the motor driving unit determines a corresponding heart roll for removing the foreign material based on the received dent information, and alternately performs an acceleration operation and a deceleration operation on the corresponding motor connected to the determined heart roll may include controlling

When the manipulation unit receives the dent information, the locations of the hearth rolls where the foreign material is predicted to be present based on the received dent information may be displayed.

The manipulation unit is displayed to input the dent interval pitch length value of the received dent information, the diameter value of the hearth roll calculated based on the input dent interval pitch length value is displayed, and the diameter value of the displayed hearth roll is displayed. By checking, the foreign material removal operation display window for performing the foreign material removal operation on the corresponding motor connected to the corresponding hearth roll requiring the foreign material removal may be displayed to be selected.

The control unit further receives a winding length cumulative value of the steel sheet by rotation of the tension reel from a tension reel, the received winding length cumulative value of the steel sheet and the dent interval pitch length value of the received dent information It is possible to further control the manipulation unit to perform a foreign material removal operation for the removal of the foreign material by the manipulation unit based on the manipulation unit.

The controller may further determine a corresponding hearth roll for removing the foreign material based on the received accumulated value of the winding length of the steel sheet and the dent interval pitch length value of the received dent information.

The control unit may control the motor driving unit to alternately perform an acceleration operation at a first predetermined target rotation speed value and a deceleration operation at a predetermined second target rotation speed value for the motor connected to the determined heart roll. have.

The first target rotation speed value and the second target rotation speed value may be determined based on a type of a steel plate, a standard of the steel plate, a diameter of a hearth roll, and a motor load factor.

In a heating furnace management method of a continuous hot-dip galvanizing line process according to another aspect of the disclosed invention, a hearth roll provided in a heating furnace for heating a steel sheet transferred to a continuous hot-dip galvanizing line is performed by a quality defect inspection device. When it is determined that there is a foreign material, dent information due to the foreign material is output, the dent information due to the foreign material is received by the control unit, and the foreign material is removed for the removal of the foreign material based on the received dent information by the operation unit operation is performed, and when the foreign material removal operation is performed, the controller determines a corresponding heart roll for removing the foreign material based on the received dent information, and the determined corresponding heart roll is performed by the motor driving unit for driving the motor It may include alternately performing an acceleration operation and a deceleration operation for the corresponding motor connected to the .

The operation of removing the foreign material for the removal of the foreign material may include displaying, by the manipulation unit, positions of the hearth rolls where the foreign material is predicted to exist based on the received dent information.

Performing the foreign material removal operation for the removal of the foreign material is displayed to input the dent interval pitch length value of the received dent information by the manipulation unit, and based on the dent interval pitch length value input by the manipulation unit The calculated diameter value of the hearth roll is displayed, and the displayed diameter value of the hearth roll is checked by the manipulation unit, and the foreign material removal operation is performed for the motor connected to the hearth roll requiring the removal of the foreign material. It may be displayed to select a display window.

To perform the foreign material removal operation for the removal of the foreign material, the accumulated value of the winding length of the steel sheet by the rotation of the tension reel is further received from the tension reel by the control unit, and the received by the operation unit Based on the accumulated value of the winding length of the steel sheet and the dent interval pitch length value of the received dent information, the foreign material removal operation for the removal of the foreign material may be further performed.

The method may further include determining, by the controller, a corresponding hearth roll for removing the foreign material based on the received accumulated value of the winding length of the steel sheet and the dent interval pitch length value of the received dent information.

Alternately performing the acceleration operation and the deceleration operation with respect to the corresponding motor includes, by the motor driving unit, an acceleration operation and a predetermined first rotation speed value for the corresponding motor connected to the determined hearth roll. 2 It may be to alternately perform deceleration with the target rotation speed value.

Alternately performing the acceleration operation and the deceleration operation with respect to the corresponding motor may include, by the control unit controlling the motor driving unit, the first target rotational speed value and the second target rotational speed value according to the type of steel plate and the value of the steel plate. It may be decided based on the size and diameter of the hearth roll and the motor load factor.

According to one aspect of the disclosed invention, it is possible to provide a heating furnace management system for a continuous hot-dip galvanizing line process capable of improving production yield by preventing quality defects of a steel sheet material and a method for managing the same.

According to another aspect of the disclosed invention, it is possible to provide a heating furnace management system for a continuous hot-dip galvanizing line process capable of preventing deterioration of a driving part, and a method for managing the same.

1 shows an example of a continuous hot-dip galvanizing line process to which a heating furnace management system according to an embodiment is applied.
2 shows an example of a steel sheet photographed by a quality defect inspection device during a continuous hot-dip galvanizing line process to which a heating furnace management system according to an embodiment is applied.
3 and 4 show an example in which a dent is formed on the steel sheet by foreign substances present in the hearth roll during the continuous hot-dip galvanizing line process to which the heating furnace management system according to an embodiment is applied.
5 shows the configuration of a heating furnace management system according to an embodiment.
6 illustrates an example in which the positions of the hearth rolls predicted to contain foreign substances are displayed in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.
7 shows an example of inputting a dent interval pitch length value in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.
8 illustrates an example of a process in which a foreign material removal operation display window is displayed to perform a foreign material removal operation in a heating furnace management system of a continuous hot-dip galvanizing line process according to an embodiment.
9 shows an example of determining a corresponding hearth roll for removing foreign substances in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.
10 shows an example of controlling each motor driving unit in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.
11 is an example of alternately accelerating and decelerating a motor to a first target rotational speed value and a second target rotational speed value in a heating furnace management system of a continuous hot-dip galvanizing line process according to an embodiment; show
12 shows an example of a management method of a heating furnace management system according to an embodiment.
13 shows another example of a management method of a heating furnace management system according to an embodiment.
14 shows an example of performing a foreign material removal operation in the heating furnace management system according to an embodiment.
15 illustrates an example in which foreign substances are removed by a motor that alternately performs an acceleration operation and a deceleration operation in the heating furnace management system according to an embodiment.

Like reference numerals refer to like elements throughout. This specification does not describe all elements of the embodiments, and general content in the technical field to which the disclosed invention pertains or content overlapping between the embodiments is omitted. The term 'part, module, member, block' used in this specification may be implemented in software or hardware, and according to embodiments, a plurality of 'part, module, member, block' may be implemented as one component, It is also possible for one 'part, module, member, block' to include a plurality of components.

Throughout the specification, when a part is "connected" to another part, it includes not only direct connection but also indirect connection, and indirect connection includes connection through a wireless communication network. do.

Also, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Throughout the specification, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member exists between the two members.

Terms such as first, second, etc. are used to distinguish one component from another, and the component is not limited by the above-mentioned terms.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In each step, the identification code is used for convenience of description, and the identification code does not describe the order of each step, and each step may be performed differently from the specified order unless the specific order is clearly stated in the context. have.

Hereinafter, the working principle and embodiments of the disclosed invention will be described with reference to the accompanying drawings.

1 shows an example of a continuous hot-dip galvanizing line process to which a heating furnace management system according to an embodiment is applied.

1, the heating furnace management system of the continuous hot-dip galvanizing line process uses at least one of the quality defect inspection device 20 and the tension reel 30 to transfer the steel sheet (S) to the continuous hot-dip galvanizing line. ), it is determined whether there is a foreign material in the hearth roll 7 provided in the heating furnace A, and if there is a foreign material, the corresponding hearth roll 7 is used to remove the foreign material using the management device 110. It is determined and may control the motor driving unit 40 that drives the motor 50 to alternately perform an acceleration operation and a deceleration operation with respect to the corresponding motor 50 connected to the determined corresponding heart roll 7 .

Such a heating furnace management system for the continuous hot-dip galvanizing line process can quickly find and remove foreign substances (M) present in the hearth roll 7 even during the operation of the continuous hot-dip galvanizing line process, thereby preventing poor quality of steel sheet material. This can improve the production yield. In addition, since the heating furnace management system of the continuous hot-dip galvanizing line process does not turn on/off the motor driving unit 40 that drives the motor 50 , deterioration of the driving parts may be prevented.

Hereinafter, the furnace management system of the continuous hot-dip galvanizing line process will be examined in detail.

The heating furnace management system of the continuous hot-dip galvanizing line process may include a heating furnace A, a quality defect inspection device 20 , a tension reel 30 , and a management device 110 .

First, in the continuous hot-dip galvanizing line process, the steel sheet (S) that has passed through the payoff reel (1), the welding machine (2) and the looper (3) is used with a scale breaker (4) to scale the surface of the steel sheet (S). Grinding, removing scale by a pickling process including a pickling tank (5) and a water washing tank (6), heat-treating in a heating furnace (A), and manufacturing an alloy-plated steel sheet through a plating tank (8), After immersing the heat-treated steel sheet (S) in the plating bath accommodated in the plating bath (8), adjusting the amount of plating through gas wiping (9), and cooling the steel sheet (S) through the cooling zone (10), The alloy plated steel sheet can be manufactured by passing through the skin pass 11 , the tension leveler 12 , and the post-treatment facility 13 .

The heating furnace (A) can heat the steel sheet (S) transferred to the continuous hot-dip galvanizing line. For example, the heating furnace (A) may heat the steel plate (S) to 850 °C or higher. The heating furnace (A) may include a heart roll (Heart Roll, 7) for transferring the steel plate (S).

The quality defect inspection apparatus 20 may inspect the quality defects for the steel sheet S that has passed the post-processing facility 13 . The quality defect inspection apparatus 20 may inspect defects such as a surface state and an imbalance state of the steel plate S. For example, the quality defect inspection apparatus 20 may include a high-definition camera. The quality defect inspection apparatus 20 may be mounted on a ceiling surface or a separate structure, and may acquire image data of the steel plate S by photographing the steel plate S that has passed through the post-processing facility 13 . The quality defect inspection apparatus 20 may acquire image data of the steel plate S at a specific time period.

2 shows an example of a steel sheet photographed by a quality defect inspection device during a continuous hot-dip galvanizing line process to which a heating furnace management system according to an embodiment is applied.

As shown in FIG. 2 , the quality defect inspection apparatus 20 may acquire image data of the steel sheet S for the steel sheet S wound by the tension reel 30 . If the obtained image data of the steel sheet S includes dent information D, the quality defect inspection apparatus 20 determines that there is a foreign material in the hearth roll 7, and dent information caused by the foreign material (D) may be transmitted to the management device 110 . The quality defect inspection apparatus 20 may transmit the dent interval pitch length value W of the dent information D to the management apparatus 110 based on the obtained image data of the steel sheet S. For example, the foreign material may be a thin piece of flake that is dropped from the steel sheet material during the manufacturing of the steel sheet. The flakes are not treated under appropriate conditions for steel sheet production in the previous process of the heating furnace (A), and may be detached from the steel sheet material when heat-treated in the heating furnace (A). The dent information D may be steel sheet defect information in which the flake is attached to the hearth roll 7 and becomes at least one of a concave state and a scratched state in which the steel sheet S is dented by the rotation of the hearth roll 7 . .

The tension reel 30 may wind the steel plate S by clockwise rotation in a moving direction. The tension reel 30 may transmit the accumulated value L of the winding length of the steel plate S by rotation to the management device 110 .

3 and 4 show an example in which a dent is formed on the steel sheet by foreign substances present in the hearth roll during the continuous hot-dip galvanizing line process to which the heating furnace management system according to an embodiment is applied.

3 and 4, the dent D1 may be formed in a state in which the steel plate S is scratched by the rotation of the hearth roll 7 to which the foreign material M is attached, and the steel plate S It can be formed in this recessed state.

5 shows the configuration of a heating furnace management system according to an embodiment.

As shown in FIG. 5 , the management device 110 may include a manipulation unit 111 and a control unit 112 . For example, the management device 110 may be a PC or a tablet PC or a notebook computer.

The operation unit 111 receives the dent information D by the foreign material M from the control unit 112 and removes the foreign material M present in the hearth roll 7 based on the received dent information D. An operation for removing the foreign material M may be performed. The operation unit 111 receives the dent interval pitch length value W of the cumulative winding length L of the steel sheet S and the dent information D from the control unit 112, and the received winding length of the steel sheet S Based on the accumulated value (L) and the dent interval pitch length value (W) of the dent information (D), an operation for removing the foreign material (M) can be performed to remove the foreign material (M) present in the hearth roll (7) have.

6 shows an example in which the positions of the hearth rolls predicted to be present in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment are displayed.

As shown in FIG. 6 , the manipulation unit 111 may include a Human-Machine Interface (HMI) module to perform an operation for removing the foreign material (M). When the manipulation unit 111 receives the dent information D from the control unit 112 , the hearth rolls 7a to 7j provided in the heating furnace A predicted to contain foreign substances based on the received dent information D. The position P of may be displayed. The operation unit 111 further receives the accumulated value (L) of the winding length of the steel sheet (S) by the rotation of the tension reel 30 from the control unit 112, and the dent interval pitch length value (W) of the dent information (D) When receiving additional The positions P of the heart rolls 7a to 7j provided in ) may be further displayed. The positions P of the heart rolls 7a to 7j may be displayed along with a blinking operation having a predetermined period on the screen. The manager and/or operator may select the display window corresponding to the position P of the heart rolls 7a to 7j performing the blinking operation by a touch screen method or a mouse click method.

7 shows an example of inputting a dent spacing pitch length value in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.

As shown in FIG. 7 , when the display window corresponding to the position P of the heart rolls 7a to 7j is selected by the manager and/or the operator, the operation unit 111 controls the dent information ( D) may be displayed to input the dent spacing pitch length value (W). The manager and/or operator may input the dent interval pitch length value W by a touch screen input method or a mouse click input method.

8 illustrates an example of a process in which a foreign material removal operation display window is displayed to perform a foreign material removal operation in a heating furnace management system of a continuous hot-dip galvanizing line process according to an embodiment.

As shown in FIG. 8 , when the dent interval pitch length value of the dent information D is input by the manager and/or the operator, the operation unit 111 is a hearth roll calculated based on the input dent interval pitch length value. A diameter value can be displayed. The manipulation unit 111 may display the motors (motors #1 to motor #4, ...) corresponding to the diameter value of the hearth roll together with the diameter value of the hearth roll calculated based on the dent interval pitch length value in a list format. can The operation unit 111 is an on-button to perform the foreign material removal operation alone or in duplicate for the motors (motor #1 to motor #4, ...) corresponding to the diameter value of the hearth roll requiring the removal of the foreign material (M). can be displayed. The manager and/or operator checks the displayed diameter value of the hearth roll and the motors (motor #1 to motor #4, ...) corresponding to the diameter value of the hearth roll requiring foreign material removal, The on button of the foreign material removal operation display window for performing the foreign material removal operation for the corresponding motor connected to the corresponding heart roll can be selected. The manager and/or operator may select the foreign material removal operation display window using a touch screen method or a mouse click method.

The control unit 112 includes a motor driving unit 40 for driving a motor 50 connected to the hearth roll 7 to transport the steel plate S while removing foreign substances M by rotation of the hearth roll 7 and electrical can be connected to The controller 112 may include a processor 112a and a memory 112b, and the processor 112a may include a programmable logic controller (PLC).

When the processor 112a receives the dent information D by the foreign material M present in the hearth roll 7 from the quality defect inspection device 20, the operation unit 111 based on the received dent information D Thus, it is possible to control the manipulation unit 111 to perform a foreign material removal operation for the removal of the foreign material M.

The processor 112a further receives the winding length accumulated value L of the steel sheet S by rotation of the tension reel 30 from the tension reel 30, and the hearth roll 7 from the quality defect inspection device 20 When the dent interval pitch length value (W) of the dent information (D) by the foreign material (M) present in the The manipulation unit 111 may be further controlled to perform a foreign material removal operation for the removal of the foreign material M by the manipulation unit 111 based on the dent spacing pitch length value W of the .

When the foreign material removal operation is performed by the manipulation unit 111 , the processor 112a may determine a corresponding hearth roll 7 for removing the foreign material based on the dent information D received from the quality defect inspection apparatus 20 . . When the foreign material removal operation is performed by the manipulation unit 111 , the processor 112a determines the accumulated value L of the winding length of the steel plate S received from the tension reel 30 and the dent received from the quality defect inspection device 20 . Based on the dent interval pitch length value (W) of the information (D), it is possible to further determine the corresponding heart roll 7 for removing foreign substances.

9 shows an example of determining a corresponding hearth roll for removing foreign substances in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.

As shown in FIG. 9 , the processor 112a includes a first heart roll 7a, a second heart roll 7b, and a third heart roll 7c for removing foreign substances based on the received dent information D. and a fourth heart roll 7d may be determined. The processor 112a includes a first hearth roll 7a and a second hearth roll 7a for removing foreign substances based on the received winding length accumulation value of the steel sheet S and the dent interval pitch length value W of the received dent information D. The heart roll 7b, the third heart roll 7c, and the fourth heart roll 7d can be determined. The processor 112a may determine the corresponding heart rolls 7a to 7d corresponding to the corresponding motors (motor #1 to motor #4) illustrated in FIG. 8 .

The processor 112a may control the motor driving unit 40 to alternately perform an acceleration operation and a deceleration operation on the corresponding motor 50 connected to the determined corresponding heart roll 7 .

The processor 112a selects the corresponding heart rolls 7a to 7d corresponding to the corresponding motors (motor #1 to motor #4) by selecting the on button of the foreign material removal operation display window of the manipulation unit 111 shown in FIG. 8 . It is determined, and each of the motor driving units 40 may be controlled to alternately perform an acceleration operation and a deceleration operation for each corresponding motor 50 connected to the corresponding heart rolls 7a to 7d.

10 shows an example of controlling each motor driving unit in the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment.

10, the processor 112a includes a first heart roll 7a, a second heart roll 7b, a third heart roll 7c, and a fourth heart roll (7c) for removing the foreign material M. A first motor driving unit to alternately perform an acceleration operation and a deceleration operation with respect to the first motor 50a, the second motor 50b, the third motor 50c, and the fourth motor 50d respectively connected to 7d) (50a), the second motor driving unit 50b, the third motor driving unit 50c, and the fourth motor driving unit 50d may be controlled, respectively.

11 is an example of alternately accelerating and decelerating a motor to a first target rotational speed value and a second target rotational speed value in a heating furnace management system of a continuous hot-dip galvanizing line process according to an embodiment; show

As shown in FIG. 11 , the processor 112a performs an acceleration operation with a predetermined first target rotational speed value for the corresponding motor 50 connected to the determined corresponding hearth roll 7 and performs an acceleration operation with a second predetermined target rotational speed value. The motor driving unit 40 may be controlled to alternately perform the deceleration operation. The motor driving unit 40 may include a pulse generator encoder (PLG encoder) to rotate the corresponding motor 50 according to the first target rotation speed value and the second target rotation speed value received from the control unit 112 . At least one of a motor current feedback control, a motor current feedforward control, a rotational speed feedback control, and a rotational speed feedforward control may be performed on the rotational speed value of the corresponding motor 50 output from the pulse generator encoder.

The first target rotation speed value and the second target rotation speed value may be determined based on the type of the steel plate, the standard of the steel plate, the diameter of the hearth roll, and a motor load factor. The first target rotation speed value and the second target rotation speed value may be set in the controller 112 by adding a motor load factor to a compensation factor indicating a correlation between the type of the steel plate, the standard of the steel plate, and the diameter of the hearth roll. The compensation factor may be expressed as in [Equation 1], and the motor load factor may be expressed as [Equation 2] below.

[Equation 1]

는 보상 팩터,

는 탄소강 면적,

는 강판 폭,

는 강판 두께,

는 허스롤 직경일 수 있다.At this time,

is the reward factor,

is the area of carbon steel,

is the steel plate width,

is the thickness of the steel plate,

may be the hearth roll diameter.

[Equation 2]

는 모터의 단자전압,

는 모터의 역기전압,

는 모터의 계자,

은 모터의 회전수,

는 모터의 주회로 전류,

은 모터의 주회로 저항일 수 있다.At this time,

is the motor terminal voltage,

is the back electromotive voltage of the motor,

is the field of the motor,

is the number of revolutions of the motor,

is the main circuit current of the motor,

may be the main circuit resistance of the motor.

The processor 112a includes an image processor for processing dent information (D) or a dent interval pitch length value (W) of dent information (D), and a digital signal processor for processing a winding length accumulation value (L) of the steel plate (S) and a micro control unit (MCU) that generates a signal for driving the motor 60 in response to a manipulation signal to remove the foreign material M.

The memory 112b may temporarily store the dent information D or the dent interval pitch length value W of the dent information D. The memory 112b may temporarily store the dent information D or the processing result of the dent interval pitch length value W of the dent information D. The memory 112b may temporarily store the accumulated value L of the winding length of the steel plate S. The memory 112b may temporarily store the processing result of the winding length accumulation value L of the steel plate S. The memory 112b may temporarily store an operation signal manipulated to remove the foreign material M. The memory 112b may temporarily store the processing result of the manipulation signal manipulated to remove the foreign material M. The memory 112b may temporarily store a signal for driving the motor 60 in response to a manipulation signal to remove the foreign material M. The memory 112b may temporarily store a processing result of a signal for driving the motor 60 in response to a manipulation signal to remove the foreign material M.

The memory 112b includes a program and/or data for the processor 112a to process the dent information D or the dent interval pitch length value W of the dent information D, and the memory 112b includes the processor 112a. A program and/or data for processing the accumulated value L of the winding length of the provisional steel plate S, and the memory 112b, the processor 112a responds to an operation signal to remove the foreign material M. The motor 60 It is possible to store a program and/or data for processing a signal for driving the .

The memory 112b may include a buffer memory, and not only volatile memories such as S-RAM and D-RAM, but also flash memory, read-only memory (ROM), and erasable memory (Erasable). Non-volatile memory such as Programmable Read Only Memory (EPROM) may be included.

12 shows an example of a management method of a heating furnace management system according to an embodiment. 13 shows another example of a management method of a heating furnace management system according to an embodiment.

12 and 13 , the quality defect inspection apparatus 20 may perform a quality defect inspection on the steel plate S ( 1210 ).

The quality defect inspection apparatus 20 may determine whether a foreign material is present in the hearth roll 7 ( 1220 ). The quality defect inspection apparatus 20 acquires image data of the steel sheet S for the steel sheet S wound by the tension reel 30, and based on the obtained image data of the steel sheet S, the hearth roll 7 ), it is possible to determine whether a foreign material (M) is present. If dent information D is included in the acquired image data of the steel sheet S, the quality defect inspection apparatus 20 may determine that the foreign material M is present in the hearth roll 7 .

12 , when the quality defect inspection apparatus 20 determines that the foreign material M is present in the hearth roll 7 (Yes of 1220 ), the quality defect inspection apparatus 20 detects the foreign material M by the quality defect inspection apparatus 20 . It is possible to output the dent information (D) by (1231). If the quality defect inspection apparatus 20 determines that the foreign material M does not exist in the hearth roll 7 (NO in 1220), it may continue to perform a process for manufacturing a subsequent steel plate (1221).

The management device 110 may receive, by the controller 112, the dent information D due to the foreign material M (1241). The dent information D may be steel sheet defect information in which the flake is attached to the hearth roll 7 and becomes at least one of a concave state and a scratched state in which the steel sheet S is dented by the rotation of the hearth roll 7 . .

Referring to FIG. 13 , when the quality defect inspection apparatus 20 determines that the foreign material M is present in the hearth roll 7 (Yes of 1220 ), the steel plate S by rotation by the tension reel 30 It is possible to further output the winding length accumulated value L of and further output the dent interval pitch length value W of the dent information D due to the foreign material M by the quality defect inspection apparatus 20 (1232). ). The tension reel 30 may wind the steel plate S by clockwise rotation in a moving direction.

The management device 110 receives, by the control unit 112, the dent interval pitch length value (W) of the dent information (D) by the winding length accumulation value (L) of the steel plate (S) and the foreign material (M). may (1242).

12 and 13 , the management device 110 may perform a foreign material removal operation for the removal of the foreign material M based on the received dent information D by the operation unit 111 and receive It is possible to perform the foreign material removal operation for the removal of the foreign material (M) based on the cumulative value (L) of the winding length of the steel sheet (S) and the dent interval pitch length value (W) of the dent information (D) (1250) .

14 shows an example of performing a foreign material removal operation in the heating furnace management system according to an embodiment.

Referring to FIG. 14 , the management device 110 by the operation unit 111, the received dent information (D) or the received winding length cumulative value (L) of the received steel plate (S) and the dent interval of the dent information (D) Based on the pitch length value W, the positions P of the hearth rolls 7a to 7j where the foreign material M is predicted to be present may be indicated ( 1251 , see FIG. 6 ). When the operation unit 111 receives the dent information (D) or the cumulative value (L) of the winding length of the steel sheet (S) and the dent interval pitch length value (W) of the dent information (D) from the control unit 112, the received dent Based on the information (D) or the received winding length cumulative value (L) of the steel sheet (S) and the dent interval pitch length value (W) of the dent information (D), in the heating furnace (A) where foreign substances are predicted to exist Positions P of the provided heart rolls 7a to 7j may be indicated. The positions P of the heart rolls 7a to 7j may be displayed along with a blinking operation having a predetermined period on the screen. The manager and/or operator may select the display window corresponding to the position P of the heart rolls 7a to 7j performing the blinking operation by a touch screen method or a mouse click method.

The management device 110 may be displayed to input a dent interval pitch length value of the received dent information D by the manipulation unit 111 ( 1252 , see FIG. 7 ). When the display window corresponding to the position P of the heart rolls 7a to 7j is selected by the manager and/or the operator, the operation unit 111 is the dent interval pitch length value of the dent information D by the manager and/or the operator may be displayed for input. The manager and/or operator may input the dent interval pitch length value W by a touch screen input method or a mouse click input method.

The management device 110 may display the diameter value of the hearth roll calculated based on the input dent spacing pitch length value by the manipulation unit 111 ( 1253 , see FIG. 8 ). When the dent interval pitch length value of the dent information D is input by the manager and/or the operator, the manipulation unit 111 may display a diameter value of the hearth roll calculated based on the input dent interval pitch length value. The manipulation unit 111 may display the motors (motors #1 to motor #4, ...) corresponding to the diameter value of the hearth roll together with the diameter value of the hearth roll calculated based on the dent interval pitch length value in a list format. can The operation unit 111 is an on-button to perform the foreign material removal operation alone or in duplicate for the motors (motor #1 to motor #4, ...) corresponding to the diameter value of the hearth roll requiring the removal of the foreign material (M). can be displayed.

The manager and/or operator checks the displayed diameter value of the hearth roll and the motors (motor #1 to motor #4, ...) corresponding to the diameter value of the hearth roll that needs to be removed by the operation unit 111, An on button of the foreign material removal operation display window for performing a foreign material removal operation for a corresponding motor connected to a corresponding hearth roll requiring foreign material (M) removal may be selected ( 1254 ). The manager and/or operator may select the foreign material removal operation display window using a touch screen method or a mouse click method.

12 and 13 , when a foreign material removal operation is performed by the operation unit 111 , the management device 110 performs a corresponding hearth for foreign material removal based on the dent information D received by the control unit 112 . It is possible to determine the roll 7, and based on the accumulated value (L) of the winding length of the steel sheet (S) received by the control unit 112 and the dent interval pitch length value (W) of the received dent information (D), foreign matter It is possible to determine the corresponding heart roll 7 for removal (1260, see FIG. 9). The control unit 112 removes foreign substances based on the received dent information (D) or the accumulated winding length value (L) of the received steel sheet (S) and the dent interval pitch length value (W) of the received dent information (D) A first heart roll 7a, a second heart roll 7b, a third heart roll 7c, and a fourth heart roll 7d may be determined for each. The controller 112 may determine the corresponding heart rolls 7a to 7d corresponding to the corresponding motors (motors #1 to #4) illustrated in FIG. 8 .

The motor driving unit 40 may drive the motor 40 to alternately perform an acceleration operation and a deceleration operation with respect to the corresponding motor 50 connected to the corresponding heart roll 7 determined by the control unit 112 ( 1270 ). , see Fig. 10). The motor driving unit 40 selects the on button of the foreign material removal operation display window of the manipulation unit 111 shown in FIG. may be determined, and the motors 40 may be respectively driven to alternately perform an acceleration operation and a deceleration operation for each corresponding motor 50 connected to the corresponding heart rolls 7a to 7d. The motor driving unit 40 includes a first heart roll 7a, a second heart roll 7b, a third heart roll 7c, and a fourth heart roll 7d respectively connected to the first heart roll 7a, the second heart roll 7b, and the fourth heart roll 7d for removing the foreign material M. The first motor 50a and the second motor ( 50b), the third motor 50c, and the fourth motor 50d may be driven, respectively.

The motor driving unit 40 accelerates the motor 50 connected to the hearth roll 7 determined by the control unit 112 to a predetermined first target rotational speed value and decelerates to a second predetermined target rotational speed value. The motor 40 may be driven to alternately perform the operation ( 1270 , see FIG. 11 ). The motor driving unit 40 rotates the corresponding motor 50 output from the pulse generator encoder to rotate the corresponding motor 50 according to the first target rotation speed value and the second target rotation speed value received from the control unit 112 . At least one of a motor current feedback control, a motor current feedforward control, a rotational speed feedback control, and a rotational speed feedforward control may be performed with respect to the speed value. The control unit 112 may determine the first target rotational speed value and the second target rotational speed value based on the type of the steel plate, the standard of the steel plate, the diameter of the hearth roll, and the motor load factor. The first target rotation speed value and the second target rotation speed value may be set in the controller 112 by adding a motor load factor to a compensation factor indicating a correlation between the type of the steel plate, the standard of the steel plate, and the diameter of the hearth roll.

15 illustrates an example in which foreign substances are removed by a motor that alternately performs an acceleration operation and a deceleration operation in the heating furnace management system according to an embodiment.

15 , the first motor 50a, the second motor 50b, the third motor 50c, and the fourth motor 50d have a first hearth roll 7a and a second hearth roll 7a to remove foreign substances. The acceleration operation and the deceleration operation may be alternately performed with respect to the roll 7b, the third heart roll 7c, and the fourth heart roll 7d, respectively. The first motor 50a, the second motor 50b, the third motor 50c, and the fourth motor 50d may rotate according to the first target rotation speed value and the second target rotation speed value.

12 and 13 , the manipulation unit 111 is configured to remove foreign substances present in the first heart roll 7a, the second heart roll 7b, the third heart roll 7c, and the fourth heart roll 7d. If it is removed, the foreign material removal operation may not be performed ( 1280 ). When the foreign substances present in the first heart roll 7a, the second heart roll 7b, the third heart roll 7c, and the fourth heart roll 7d are removed, the operation unit 111 displays the foreign material removal operation display window again. may be displayed (see FIG. 8 ). The manipulation unit 111 may be displayed to select an off button of the foreign material removal operation display window. The manager and/or operator may select the off button of the foreign material removal operation display window by a touch screen method or a mouse click method. The control unit 112 may be changed to a release mode for not performing the foreign material removal operation by selecting the off button of the foreign material removal operation display window. When the first motor 50a, the second motor 50b, the third motor 50c, and the fourth motor 50d are driven for removing foreign substances, the control unit 112 may include the first motor 50a and the second motor 50d. Each of the rotation speed values is received from 50b, the third motor 50c, and the fourth motor 50d, and it may be determined that the foreign matter has been removed based on the respective rotation speed values. When each rotation speed value is less than a predetermined reference value, the control unit 112 may determine that foreign matter is present, and if each rotation speed value is greater than a predetermined reference value, it may be determined that the foreign material has been removed.

As described above, the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment can quickly find and remove foreign substances (M) present in the hearth roll 7 even during the operation of the continuous hot-dip galvanizing line process, It is possible to prevent quality defects of the steel sheet material, thereby improving the production yield.

Since the heating furnace management system of the continuous hot-dip galvanizing line process according to an embodiment does not continuously turn on/off the motor driving unit 40 for driving the motor 50 , deterioration of the driving parts may be prevented.

Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing instructions executable by a computer. Instructions may be stored in the form of program code, and when executed by a processor, may create a program module to perform the operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

The computer-readable recording medium includes all types of recording media in which computer-readable instructions are stored. For example, there may be read only memory (ROM), random access memory (RAM), magnetic tape, magnetic disk, flash memory, optical data storage, and the like.

The disclosed embodiments have been described with reference to the accompanying drawings as described above. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be practiced in other forms than the disclosed embodiments without changing the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

20: quality defect inspection device 30: tension reel
40: motor driving unit 50: motor
110: management device 111: control panel
112: control unit 112a: processor
112b: memory

Claims (14)

an operation unit for performing an operation for removing foreign substances so as to remove foreign substances present in a heart roll provided in a heating furnace for heating the steel sheet transferred to the continuous hot-dip galvanizing line; and
and a control unit electrically connected to a motor driving unit for driving a motor connected to the hearth roll to transport the steel plate while removing the foreign material by rotation of the hearth roll,
The control unit is
When receiving dent information due to a foreign material present in the hearth roll from the quality defect inspection device, the operation unit performs a foreign material removal operation on the removal of the foreign material by the operation unit based on the received dent information. to control,
When the foreign material removal operation is performed, a corresponding heart roll for removing the foreign material is determined based on the received dent information, and an acceleration operation and a deceleration operation are alternately performed on a corresponding motor connected to the determined corresponding heart roll A heating furnace management system for a continuous hot-dip galvanizing line process comprising controlling the motor driving unit. According to claim 1,
The operation unit,
When the dent information is received, based on the received dent information, the location of the hearth rolls where the foreign material is expected to be present is displayed. According to claim 1,
The operation unit,
Displayed to input a dent interval pitch length value of the received dent information,
The diameter value of the hearth roll calculated based on the input dent interval pitch length value is displayed,
Continuous hot-dip galvanizing line process heating furnace that is displayed to select a foreign material removal operation display window for performing a foreign material removal operation on a motor connected to a corresponding hearth roll requiring foreign material removal by checking the displayed diameter value of the hearth roll management system. According to claim 1,
The control unit is
Further receiving from a tension reel (Tension Reel) the cumulative value of the winding length of the steel sheet by the rotation of the tension reel,
Continuous molten zinc for further controlling the operation unit to perform a foreign material removal operation for the removal of the foreign material by the operation unit based on the received winding length accumulated value of the steel sheet and the dent interval pitch length value of the received dent information The furnace management system of the plating line process. 5. The method of claim 4,
The control unit is
A heating furnace management system for a continuous hot-dip galvanizing line process for further determining a corresponding hearth roll for removing the foreign material based on the received accumulated value of winding length of the steel sheet and the dent interval pitch length value of the received dent information. According to claim 1,
The control unit is
Continuous hot-dip galvanizing for controlling the motor driving unit to alternately perform an acceleration operation at a predetermined first target rotational speed value and a deceleration operation at a predetermined second target rotational speed value for the corresponding motor connected to the determined corresponding hearth roll Furnace management system in line process. 7. The method of claim 6,
The heating furnace management system for a continuous hot-dip galvanizing line process, wherein the first target rotation speed value and the second target rotation speed value are determined based on a type of a steel plate, a standard of a steel plate, a diameter of a hearth roll, and a motor load factor. If the quality defect inspection device determines that there is a foreign material in the hearth roll provided in the heating furnace for heating the steel sheet transferred to the continuous hot-dip galvanizing line, dent information due to the foreign material is output,
By the control unit, receiving the dent information by the foreign material,
By the manipulation unit, on the basis of the received dent information to perform a foreign material removal operation for the removal of the foreign material,
When the foreign material removal operation is performed, the controller determines a corresponding hearth roll for removing the foreign material based on the received dent information,
A heating furnace management method for a continuous hot-dip galvanizing line process, comprising alternately performing an acceleration operation and a deceleration operation on the determined motor connected to the determined hearth roll by a motor driving unit for driving the motor. 9. The method of claim 8,
To perform the foreign material removal operation for the removal of the foreign material,
The heating furnace management method of the continuous hot-dip galvanizing line process in which the position of the hearth rolls predicted to contain the foreign material is displayed based on the received dent information by the manipulation unit. 9. The method of claim 8,
To perform the foreign material removal operation for the removal of the foreign material,
Displayed by the manipulation unit to input a dent interval pitch length value of the received dent information,
The diameter value of the hearth roll calculated based on the input dent interval pitch length value is displayed by the manipulation unit,
Continuous melting is displayed to select a foreign material removal operation display window for performing a foreign material removal operation on a corresponding motor connected to a corresponding hearth roll requiring the foreign material removal by checking the diameter value of the displayed hearth roll by the manipulation unit How to manage the furnace in the galvanizing line process. 9. The method of claim 8,
To perform the foreign material removal operation for the removal of the foreign material,
Receiving, by the control unit, the cumulative value of the winding length of the steel sheet by the rotation of the tension reel from a tension reel,
Continuous hot-dip galvanizing line process to further perform, by the manipulation unit, a foreign material removal operation for the removal of the foreign material based on the received winding length cumulative value of the steel sheet and the received dent interval pitch length value of the received dent information of the furnace management method. 12. The method of claim 11,
Continuous hot-dip galvanizing line process further comprising, by the controller, determining a corresponding hearth roll for removing the foreign material based on the received accumulated value of the winding length of the steel sheet and the dent interval pitch length value of the received dent information of the furnace management method. 9. The method of claim 8,
Alternating the acceleration operation and the deceleration operation for the corresponding motor includes:
Continuous melting of alternately performing, by the motor driving unit, an acceleration operation at a first predetermined target rotation speed value and a deceleration operation at a second predetermined target rotation speed value for the motor connected to the determined hearth roll How to manage the furnace in the galvanizing line process. 14. The method of claim 13,
Alternating the acceleration operation and the deceleration operation for the corresponding motor includes:
Continuous melting in which the control unit for controlling the motor driving unit determines the first target rotation speed value and the second target rotation speed value based on the type of steel plate, the standard of the steel plate, the diameter of the hearth roll, and the motor load factor How to manage the furnace in the galvanizing line process.

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