KR102604878B1 - Defensive driving system and method for fault of pickled strip - Google Patents

Abstract

The present invention enables detailed response of pickling steel sheets by mode depending on the degree of defects, enabling economical production of high-quality products through defensive operation, and significantly saving energy by pre-passing subsequent processes for products with strong defects. The present invention relates to a defensive operation system and method for responding to defects in a pickled steel sheet, comprising: a defect detection unit that outputs a defect detection signal to detect defects in a strip that has undergone a pickling process; a progress interruption control unit that determines the defect detection signal detected by the defect detection unit and applies a temporary stop control signal to temporarily stop the progress of the strip when it is determined to be a defect; A defect occurrence notification unit that applies notification information to a notification device so that the operator can confirm that the strip has stopped progressing; and a defensive operation control unit that applies control signals for each operation mode to subsequent processing equipment by an operator or a secondary sensor depending on the degree of the defect.

Description

Defensive driving system and method for fault of pickled strip}

The present invention relates to a defensive operation system and method for responding to defects in pickling steel sheets. More specifically, it is possible to respond in detail to pickling steel sheets by mode depending on the degree of defects, thereby enabling economical production of high-quality products through defensive operation. The strong defect product relates to a defensive operation system and method that responds to defects in pickling steel sheets that can significantly save energy by free-passing subsequent processes.

Generally, in the cold rolled TCM (Tandem Coid Mill) process, plate fracture shapes such as holes/cracks, folding phenomenon, scab phenomenon, and edge crack phenomenon are chronic problems that greatly reduce productivity and generate scrap. In particular, material defects are vulnerable to external forces, including tension during rolling, and can cause this plate fracture shape.

In order to solve these existing problems, technologies have been attempted in the past to detect plate breakage due to tension deviation or thickness deviation in the pickling rolling process. However, these conventional technologies have been used to detect plate breakage in a wide variety of phenomena. It was difficult to detect all of them, and since only two cases were identified: good and defective, there were problems in that even if there were defects, all parts that could be regenerated into good products through appropriate follow-up processes had to be discarded.

In addition, since all subsequent processes are performed even on strips that are determined to be defective, there are problems that energy may be wasted or adversely affect subsequent processing equipment due to unnecessary subsequent processes.

Korean Patent Application No. 10-2005-0129356

The present invention is intended to solve various problems including the above-mentioned problems. Even if there is a defect, if it is a weak defect, it can be regenerated into a good product through an appropriate follow-up process, and can be processed into a pass mode, weak defect mode, or strong defect depending on the degree of the defect. It is possible to respond in detail to pickling steel sheets by mode, so it is possible to economically produce high-quality products through defensive operation, and products with strong defects can be free-passed through the subsequent process, allowing for significant energy savings in pickling steel sheets. The purpose is to provide a corresponding defensive driving system and method. However, these tasks are illustrative and do not limit the scope of the present invention.

A defensive operation system responding to defects in pickling steel sheets according to the spirit of the present invention to solve the above problems includes a defect detection unit that outputs a defect detection signal to detect defects in a strip that has undergone a pickling process; a progress interruption control unit that determines the defect detection signal detected by the defect detection unit and applies a temporary stop control signal to temporarily stop the progress of the strip when it is determined to be a defect; A defect occurrence notification unit that applies notification information to a notification device so that the operator can confirm that the strip has stopped progressing; and a defensive operation control unit that applies control signals for each operation mode to subsequent processing equipment by an operator or a secondary sensor depending on the degree of the defect.

In addition, according to the present invention, the defensive operation control unit includes: a pass mode control unit that outputs a normal progress control signal for a subsequent process to the subsequent process device when it is determined that the operator or the sensor is not in a defective state; A weak defect mode control unit that outputs a process speed control signal to slow down the process speed to the subsequent process equipment to ensure sufficient regeneration time when the operator or the sensor determines that the subsequent process can be performed according to the speed. ; and a strong defect mode control unit that outputs a free pass control signal or a cutting removal signal to the subsequent processing device when the worker or the sensor determines that the subsequent processing is in a strong defect state.

In addition, according to the present invention, the mildly defective mode control unit may output a low-speed rolling control signal for a thickness change (FGC, Fly Gauge Change) section or a defective section to a rolling mill control unit that controls the rolling mill.

In addition, according to the present invention, the strong defect mode control unit may apply a mill entry stop control signal to the rolling mill control unit that controls the rolling mill or apply a corresponding partial cutting control signal to the cutter control unit that controls the cutter. You can.

In addition, according to the present invention, the defensive operation control unit includes an application mode control unit that outputs a release control signal to disable execution of the pass mode, weak fault mode, and hard fault mode, or a standby control signal to wait for the next command. More may be included.

In addition, according to the present invention, the defensive driving control unit includes a mode command input device including at least one of a pass mode switch, a weak fault mode switch, a hard fault mode switch, an application mode switch, and combinations thereof. It can be included.

In addition, according to the present invention, the defect notification unit displays at least one of a green warning light indicating that there is no problem, a yellow warning light indicating a high possibility of a weak defect, a red warning light indicating a high possibility of a strong defect, and combinations thereof. It may be a warning light, including:

In addition, according to the present invention, the defect detection unit includes a camera that takes pictures of the strip being transported after completing the drying process after the sensor process or the pickling process, and the progress stop control unit records the image captured by the camera. A defect determination unit that recognizes images and determines in real time whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof; and a temporary stop control signal output unit that outputs a temporary stop control signal to a strip transfer device control unit that controls the strip transfer device or a trimmer control unit that controls the trimmer when the defect determination unit determines that it is a defect.

Meanwhile, a defensive operation method in response to defects in a pickled steel sheet according to the spirit of the present invention to solve the above problem includes the steps of (a) outputting a defect detection signal to detect defects in the strip that has undergone the pickling process; (b) determining the detected defect detection signal and applying a temporary stop control signal to temporarily stop the progress of the strip if it is determined to be a defect; (c) applying notification information to a notification device so that the operator can confirm that the strip has stopped progressing; and (d) applying a control signal for each operation mode to a subsequent process device by an operator or a secondary sensor depending on the degree of the defect.

In addition, according to the present invention, step (d) includes: (d-1) outputting a normal progress control signal for the subsequent process to the subsequent process device when it is determined that the worker or the sensor is not in a defective state; (d-2) If the worker or the sensor determines that the subsequent process is in a weak defect state, depending on the speed, a process speed control signal is output to slow down the process speed to ensure sufficient regeneration time for the subsequent process equipment. steps; and (d-3) outputting a pre-pass control signal or a cutting removal signal to the subsequent processing device when the worker or the sensor determines that the subsequent processing is in a hard defect state, making it impossible to proceed with the subsequent processing.

In addition, according to the present invention, in step (b), (b-1) the image captured by the camera is recognized and whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof. determining in real time; And (b-2) when it is determined to be a defect, outputting a temporary stop control signal to the strip transfer device control unit that controls the strip transfer device or the trimmer control unit that controls the trimmer.

Additionally, according to the present invention, the pickling process may be part of a cold rolled tandem coid mill (TCM) process.

According to some embodiments of the present invention as described above, even if there is a defect, if it is a weak defect, it is regenerated into a good product through an appropriate follow-up process, such as a pass mode, weak defect mode, strong defect mode, etc. depending on the degree of the defect. It is possible to respond in detail to each pickling steel plate, making it possible to economically produce high-quality products through defensive operation, and has the effect of significantly saving energy by allowing products with strong defects to free-pass subsequent processes. Of course, the scope of the present invention is not limited by this effect.

Figure 1 is an overall conceptual diagram showing a defensive driving system responding to defects in pickled steel sheets according to some embodiments of the present invention.
FIG. 2 is a block diagram showing a progress interruption control unit of a defensive driving system corresponding to a defect in the pickled steel sheet of FIG. 1.
FIG. 3 is a block diagram showing a defensive driving control unit of a defensive driving system responding to a defect in the pickled steel sheet of FIG. 1.
Figure 4 is a flowchart showing a defensive driving method in response to defects in a pickled steel sheet according to some embodiments of the present invention.
Figure 5 is a schematic diagram showing a defensive driving method in response to defects in a pickled steel sheet according to some other embodiments of the present invention.

Hereinafter, various preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art, and the following examples may be modified into various other forms, and the scope of the present invention is as follows. It is not limited to the examples. Rather, these embodiments are provided to make the present disclosure more faithful and complete and to fully convey the spirit of the present invention to those skilled in the art. Additionally, the thickness and size of each layer in the drawings are exaggerated for convenience and clarity of explanation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will now be described with reference to drawings that schematically show ideal embodiments of the present invention. In the drawings, variations of the depicted shape may be expected, for example, depending on manufacturing technology and/or tolerances. Accordingly, embodiments of the present invention should not be construed as being limited to the specific shape of the area shown in this specification, but should include, for example, changes in shape resulting from manufacturing.

Figure 1 is an overall conceptual diagram showing a defensive driving system 100 that responds to defects in pickled steel sheets according to some embodiments of the present invention.

First, as shown in FIG. 1, the defensive operation system 100 in response to defects in the pickling steel sheet according to some embodiments of the present invention can largely detect defects in the strip 1 that has undergone the pickling process. a defect detection unit 10 that outputs a defect detection signal, and a temporary stop control signal that temporarily stops the progress of the strip 1 when the defect detection signal detected by the defect detection unit 10 is determined to be defective. A progress interruption control unit 20 that authorizes, a defect occurrence notification unit 30 that applies notification information to a notification device so that the operator 2 can confirm the interruption of progress of the strip 1, and depending on the degree of the defect. It may include a defensive operation control unit 40 that applies control signals for each operation mode to subsequent processing equipment by the operator 2 or a secondary sensor.

Here, the pickling process line may be part of a cold rolled TCM (Tandem Coid Mill) process line. As shown in FIG. 1, the pickling process line includes a welder ( 30), a pickling device 4 for acid pickling the strip 1, a drying device 5 for drying the strip 1, and a size desired by the consumer. A trimmer 6 for cutting, a rolling mill 7 for cold rolling the strip 1, and a strip transfer device 8 for transporting the strip 1 may be installed.

In addition, for example, as shown in FIG. 1, the pickling process line includes a rolling mill control unit 50 that controls the rolling mill 7, a trimmer control unit 60 that controls the trimmer 6, and the strip transfer unit. A strip transfer device control unit that controls the device 8 may be additionally installed.

Accordingly, the normal strip 1 is welded lengthwise in the welder 30 while being transported along the pickling process line by the strip conveying device 8, and then pickled in the pickling device 4, It can be dried in the drying device 5, cut to a desired size by the trimmer 6, and rolled while passing through the rolling mill 7.

However, the pickling process line is not necessarily limited to the drawing, and pickling process lines of a wide variety of types and shapes may be applied.

In addition, for example, as shown in FIG. 1, the defect detection unit 10 may include a camera 11 that takes pictures of the strip 1 being transported after completing the sensor process or the drying process after the pickling process. You can. However, the defect detection unit 10 is not necessarily limited to cameras, and all types of sensors that can detect the shape, distance, form, etc. of the strip 1 can be applied.

In addition, for example, as shown in FIG. 1, the defect occurrence notification unit 30 includes at least a green warning light 31 to indicate that there is no abnormality, a yellow warning light 32 to indicate that there is a high possibility of a weak defect, and a yellow warning light 32 to indicate that there is a high possibility of a strong defect. It may be a warning light that includes one or more of the red warning light 33 indicating high altitude and combinations thereof.

FIG. 2 is a block diagram showing the progress stop control unit 20 of the defensive driving system 100 corresponding to a defect in the pickled steel sheet of FIG. 1.

As shown in Figures 1 and 2, the progress interruption control unit 20 recognizes the image captured by the camera 11 and detects at least holes, cracks, folds, scabs, edge cracks, and combinations thereof. A defect determination unit 21 that determines in real time whether one or more defects exist, and a strip transfer device control unit 60 or trimmer 6 that controls the strip transfer device 8 when the defect determination unit 21 determines that it is a defect. ) may include a temporary stop control signal output unit 22 that outputs a temporary stop control signal to the trimmer control unit 70 that controls the trimmer control unit 70.

Therefore, the progress interruption control unit 20 recognizes the image captured by the camera 11 and determines in real time whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof. And, when it is determined to be a defect, a series of processes are performed to output a temporary stop control signal to the strip transfer device control unit 60, which controls the strip transfer device 8, or the trimmer control unit 70, which controls the trimmer 6. You can.

FIG. 3 is a block diagram showing the defensive driving control unit 40 of the defensive driving system 100 corresponding to a defect in the pickled steel sheet of FIG. 1.

As shown in FIGS. 1 to 3, the defensive driving control unit 40 of the defensive driving system 100 corresponding to a defect in the pickling steel sheet according to some embodiments of the present invention is operated by the worker 2 or the A pass mode control unit 41 that outputs a normal progress control signal for the subsequent process to the subsequent process equipment when it is determined that it is not in a defective state by the sensor, and which enables the subsequent process to proceed according to the speed by the operator 2 or the sensor. A weak defect mode control unit 42 that outputs a process speed control signal to the subsequent process device when determined to be in a weak defect state, and a weak defect mode control unit 42 that outputs a process speed control signal to the subsequent process equipment, and when determined to be a strong defect state in which subsequent process progress is impossible by the worker 2 or the sensor, the subsequent process A strong defect mode control unit 43 outputs a pre-pass control signal or a cutting removal signal to the process device, and outputs a release control signal to disable the pass mode, weak defect mode, and strong defect mode performance, or waits for the next command. An application mode control unit 44 that outputs a control signal and at least one of a pass mode switch (S1), a weak defect mode switch (S2), a strong defect mode switch (S3), an application mode switch (S4), and combinations thereof. It may include a mode command input device 45 including the above.

More specifically, for example, the weakly defective mode control unit 42 outputs a low-speed rolling control signal in the thickness change (FGC, Fly Gauge Change) section or defective section to the rolling mill control section 50 that controls the rolling mill 7. It is possible, and the strong defect mode control unit 43 applies a mill entry stop control signal to the rolling mill control unit 50 that controls the rolling mill 7 or a cutting machine that controls a cutting machine (not shown). The corresponding partial cutting control signal can be applied to the control unit (not shown).

Therefore, when the defensive operation control unit 40 determines that the worker 2 or the sensor is not in a defect state, it outputs a normal progress control signal for the subsequent process to the subsequent process equipment, and the worker 2 or the sensor 40 outputs a normal progress control signal to the subsequent process equipment. If the sensor determines that the subsequent process is possible according to the speed, a process speed control signal is output to the subsequent process device, and the worker 2 or the sensor determines that the subsequent process is not possible. When this happens, a pre-pass control signal or a cutting removal signal is output to the subsequent processing device, a release control signal is output to disable the pass mode, weak defect mode, and strong defect mode performance, or a series of processes are performed to wait for the next command. You can.

Therefore, even if there is a defect, if it is a weak defect, it can be recycled into a good product through an appropriate follow-up process. Depending on the degree of the defect, it is possible to respond in detail to the pickling steel sheet by mode such as pass mode, weak defect mode, strong defect mode, etc. through defensive operation. High-quality products can be produced economically, and defective products can be free-passed through subsequent processes, thereby significantly saving energy.

Figure 4 is a flowchart showing a defensive driving method in response to defects in a pickled steel sheet according to some embodiments of the present invention.

As shown in Figure 4, the defensive driving method in response to defects in the pickling steel sheet according to some embodiments of the present invention includes (a) a defect detection signal to detect defects in the strip 1 that has undergone the pickling process; (b) determining the detected defect detection signal and applying a temporary stop control signal to temporarily stop the progress of the strip (1) when it is determined to be a defect, (c) the strip (1) (d) applying notification information to a notification device so that the operator can check the interruption of progress, and (d) applying a control signal for each operation mode to the subsequent process equipment by the operator or a secondary sensor depending on the degree of the defect. It can be included.

In addition, for example, in step (b), (b-1) the image captured by the camera 11 is recognized to determine whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof. A step of determining in real time and (b-2) when it is determined to be a defect, a temporary stop control is provided to the strip transfer device control unit 60 that controls the strip transfer device 8 or the trimmer control unit 70 that controls the trimmer 6. It may include the step of applying a signal.

Here, for example, step (d) includes (d-1) applying a normal progress control signal for the subsequent process to the subsequent process equipment when it is determined that the worker 2 or the sensor is not in a defective state; (d-2) applying a process speed control signal to the subsequent process device when the worker or the sensor determines that the subsequent process is in a weak defect state that can proceed with the speed, and (d-3) the worker (2) Alternatively, if the sensor determines that the process is in a hard defect state in which subsequent processing cannot proceed, it may include applying a pre-pass control signal or a cutting removal signal to the subsequent processing device.

Figure 5 is a schematic diagram showing a defensive driving method in response to defects in a pickled steel sheet according to some other embodiments of the present invention.

As shown in FIGS. 1 to 5, more specifically, for example, the defect detection unit 10 can use SIS (Surface Inspection System), and the communication period is a constant period (10 seconds) and the camera You can shoot and communicate with (11), and at this time, the coil number, index, defect detection time, defect control information, defect code, defect location (W, L), defect size (X, Y) etc. can be detected.

Next, in the first stage of the material defect defense operation, the trimmer (6) is stopped according to the defect location through coil tracking, and a green warning light (31) indicates that there is no problem, and a yellow warning light (32) indicates that there is a high possibility of a weak defect. , the operator can be notified using a red warning light (33), which indicates that there is a high possibility of a strong defect.

Next, in the second stage of material defect defense operation, in the case of a weak defect, the transfer speed of the thickness change (FGC, Fly Gauge Change) section can be controlled according to the judgment of the operator or program, and in the case of a strong defect, the rolling process can be controlled. You can pre-pass and be cut later.

In other words, notching, etc. can be performed if necessary through reconfirmation by the operator, or the response mode can be determined by pressing the TCM control, that is, the pass, weak defect, and strong defect buttons, and the command can be canceled and the next signal can be signaled by pressing the apply button. It can be switched to standby state.

These manipulation results can then be transmitted to the server computer so that they can be stored as operator control information.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the attached patent claims.

1: strip
2: worker
3: welder
4: Pickling device
5: Drying device
6: trimmer
7: rolling mill
8: Strip conveying device
10: defect detection unit
11: Camera
20: Progress stop control unit
21: Defect determination unit
22: Temporary interruption control signal output unit
30: Defect occurrence notification unit
31: Green warning light
32: Yellow warning light
33: Red warning light
40: Defensive driving control unit
41: Pass mode control unit
42: weak fault mode control unit
43: Strong fault mode control unit
44: Application mode control unit
45: Mode command input device
S1: Pass mode switch
S2: Slight fault mode switch
S3: Hard fault mode switch
S4: Apply mode switch
50: rolling mill control unit
60: Strip transfer device control unit
70: Trimmer control unit
100: Defensive driving system responding to defects in pickling steel plates

Claims (12)

A defect detection unit that outputs a defect detection signal to detect defects in the strip that has undergone the pickling process;
a progress interruption control unit that determines the defect detection signal detected by the defect detection unit and applies a temporary stop control signal to temporarily stop the progress of the strip when it is determined to be a defect;
A defect occurrence notification unit that applies notification information to a notification device so that the operator can confirm that the strip has stopped progressing; and
It includes a defensive operation control unit that applies control signals for each operation mode to subsequent processing equipment by an operator or a secondary sensor according to the degree of the defect,
The defensive driving control unit,
a pass mode control unit that outputs a normal progress control signal for a subsequent process to the subsequent processing device when it is determined by the operator or the sensor that the state is not in a defective state;
a weak defect mode control unit that outputs a process speed control signal to the subsequent process device when the operator or the sensor determines that the subsequent process is possible in a weak defect state; and
a strong defect mode control unit that outputs a free pass control signal or a cutting removal signal to the subsequent processing device when the operator or the sensor determines that the subsequent processing is in a strong defect state;
A defensive operation system that responds to defects in pickling steel plates, including: delete According to claim 1,
The weak fault mode control unit,
A defensive operation system that responds to defects in pickled steel plates that outputs a low-speed rolling control signal in the thickness change (FGC, Fly Gauge Change) section or defective section to the rolling mill control unit that controls the rolling mill. According to claim 1,
The strong fault mode control unit,
A defensive operation system that responds to defects in pickled steel sheets by applying a mill entry stop control signal to the rolling mill control unit that controls the rolling mill or applying a corresponding partial cutting control signal to the cutter control unit that controls the cutter. According to claim 1,
The defensive driving control unit,
An application mode control unit that outputs a release control signal to disable execution of the pass mode, weak fault mode, and strong fault mode, or outputs a standby control signal to wait for the next command;
A defensive operation system that responds to defects in pickling steel plates, further comprising: According to claim 5,
The defensive driving control unit,
a mode command input device including at least one of a pass mode switch, a weak fault mode switch, a hard fault mode switch, an application mode switch, and combinations thereof;
A defensive operation system that responds to defects in pickling steel plates, further comprising: According to claim 1,
The defect occurrence notification unit,
Defense against defects in pickling steel sheets, which is a warning light that includes at least one of a green warning light indicating that there is no problem, a yellow warning light indicating a high possibility of a weak defect, a red warning light indicating a high possibility of a strong defect, and combinations thereof. Driving system. According to claim 1,
The defect detection unit,
It includes a camera that takes pictures of the strip being transported after completing the sensor process or the drying process after the pickling process,
The progress interruption control unit,
A defect determination unit that recognizes the image captured by the camera and determines in real time whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof; and
A temporary stop control signal output unit that outputs a temporary stop control signal to a strip transfer device control unit that controls the strip transfer device or a trimmer control unit that controls the trimmer when the defect determination unit determines that it is a defect;
A defensive operation system that responds to defects in pickling steel plates, including: (a) outputting a defect detection signal to detect defects in the strip that has undergone the pickling process;
(b) determining the detected defect detection signal and applying a temporary stop control signal to temporarily stop the progress of the strip if it is determined to be a defect;
(c) applying notification information to a notification device so that the operator can confirm that the strip has stopped progressing; and
(d) applying a control signal for each operation mode to a subsequent process device by an operator or a secondary sensor according to the degree of the defect,
In step (d),
(d-1) applying a normal progress control signal for the subsequent process to the subsequent process device when it is determined by the operator or the sensor that the state is not in a defective state;
(d-2) applying a process speed control signal to the subsequent process device when the worker or the sensor determines that the subsequent process is in a weak defect state capable of proceeding at a speed; and
(d-3) applying a pre-pass control signal or a cutting removal signal to the subsequent processing device when the worker or the sensor determines that the subsequent processing is in a hard defect state;
Defensive driving method in response to defects in pickled steel plates, including: delete According to clause 9,
In step (b),
(b-1) recognizing the image captured by the camera to determine in real time whether there is at least one defect among holes, cracks, folds, scabs, edge cracks, and combinations thereof; and
(b-2) when determined to be defective, applying a temporary stop control signal to the strip transfer device control unit that controls the strip transfer device or the trimmer control unit that controls the trimmer;
Defensive driving method in response to defects in pickled steel plates, including: According to clause 9,
The pickling process is a defensive operation method that responds to defects in pickled steel sheets, which is part of the cold rolling process (TCM, Tandem Coid Mill).

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