JP3293587B2 - Defect marking method, work method of defect-marked coil, and method of manufacturing defect-marked coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is a defect marking method of the steel sheet in the steel process lines, it relates to the production how coils working method and defect marking coils defect marking. More specifically, by marking defects on steel sheets, defects can be reliably displayed and contribute to quality assurance.
And it relates to the production how defects marking coils.

[0002]

2. Description of the Related Art A cold rolled steel sheet manufactured by cold rolling is inspected for surface defects over the entire length of the coil for quality assurance. As a method for detecting the surface defect of a cold-rolled steel sheet, the surface of the steel sheet traveling in the line is scanned in the width direction with a laser beam, and the reflected light is converted into a voltage intensity by a photoelectric conversion element such as a CCD element. A method for determining the presence / absence and degree of the presence has already been established. Regarding an internal defect of a steel sheet, a method of detecting a defect by calculating a defect depth and a defect scale in a thickness direction of the defective steel sheet by a magnetic flaw detector has already been established (Japanese Patent Application Laid-Open No. 5-196581).

Normally, the defect inspection result is displayed on a CRT or the like as information on a defect position, a defect name, a defect grade, or the like, or printed out as a document.

To make all products defect-free,
Cannot be manufactured. Therefore, after removing the harmful defective part of the purchaser based on the defect information displayed on the CRT or the like at the line, or removing the harmful defective part of the purchaser by re-inspection in the next process based on the defect information Has shipped. Further, a document describing the defect information printed out together with the coil including the harmful defect portion is submitted to the purchaser, and the purchaser is asked to remove the harmful defect.

When a harmful defect is removed in the line or in the next step, there is no clear standard for the degree of harm of the surface defect, so the removal of the harmful defect is an over-action in terms of quality assurance. In some cases, the harmful defect portion is not removed due to an oversight or a determination error due to a barely difficult to determine defect. Further, by removing the harmful defective portion, the unit weight of the coil is reduced, and there is an adverse effect such as a decrease in the work efficiency of the purchaser.

On the other hand, the purchaser of the coil must work while checking the document data describing the defect information against the actual product. This operation is not only troublesome, but in some cases, the defect is not identified. There is a risk of processing while dropping.

For these reasons, Japanese Patent Application Laid-Open No. Hei 4-2911
In Japanese Patent No. 38, marking is performed using a marking device that sprays paint or the like on a flawed portion of a steel sheet detected by a flaw detection device, and the flawed portion is easily identified when the purchaser re-examines the flawed portion. It has been proposed to be able to do so.

[0008]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No. 4-2
In the marking method disclosed in Japanese Patent No. 91138, there is no confirmation as to whether or not the marking has been performed normally. Therefore, if the marking is abnormal, it causes more trouble to the purchaser than before. Further, when a paint or the like is sprayed, shading is generated in the marking, and in a place where the paint is abundant, there is a risk that the paint is dried and a flaw is generated in a normal portion. In the case of the spray method, there is no problem when the steel sheet is not coated with oil. However, when the steel sheet is coated with oil, the paint is sprayed on the oil film so that no marking remains on the surface of the steel sheet.

Further, if all the flawed parts are marked, there is a problem that the work becomes complicated because the defective parts which are harmless to the purchaser are also marked, and the work efficiency is reduced.

[0010] For the purchaser, the position of the defect marking should be different between the case where the defect marking of the defective portion is detected automatically and the case where the defect marking is performed manually (visually). That is, when the defect marking is automatically detected, the position of the defect marking is constant, and when the defect marking is manually detected, the work efficiency is better when the defect marking is performed at the defect position.

In some cases, it is preferable to change the position of the defect marking according to the use of the steel sheet. For example, when using a steel plate by press blanking, if the position of the defect marking is fixed, there are adverse effects such as the presence of a defect but no defect marking after pressing, and conversely, the presence of a defect marking but no defect after pressing. May occur. In such a case, the purchaser is inconvenienced more than ever.

In addition, even if the same defect is a harmful defect at the center of the steel sheet, it is a harmless defect at the edge of the steel sheet, or a harmful defect on the surface of the steel sheet, but a harmless defect on the back surface of the steel sheet. The degree of harm varies depending on the application.

Further, internal defects (for example, two sheets) of a steel sheet cannot be visually detected, and when a severe processing such as a press working is performed on the steel sheet, it causes a crack or the like. Therefore, it is beneficial to mark internal defects as well as surface defects.

The present invention has been made in consideration of the above problems, and a main object of the present invention is to perform defect marking in accordance with the usage pattern of a purchaser. and regardless of whether the oil adhesion of rust preventative oil on the surface of the steel sheet, defects marking method to harmful defects reliably and easily identifiable, producing how the coils working methods and defect marking coils defect marking To provide.

[0015]

The gist of the present invention for solving the above problems is as follows. [1] A surface defect meter or an internal defect meter is provided in advance.
In the line, regarding the surface flaw, the defect name, defect grade,
Calculate the defect length and defect position in the width direction,
Indistinguishable defects are identified or even
To calculate the defect length and defect position in the width direction.
Identify harmful and harmless defects in coils using ink.
A series of steel plates equipped with ink marker devices for marking
Harmful defects and
The harmful defect / difficult to determine
When the defect reaches the ink marker device, the defect
Mark that is marked with ink
King way. [2] Defect position information in the width direction of the surface defect meter / internal defect meter
The feature is to change the position of defect marking based on
The defect marking method according to [1]. [3] Change the position of the defect marking according to the use of the steel sheet.
Deficiency described in [1] or [2].
Fall marking method. [4] Marking to distinguish harmful defects and difficult to distinguish defects
The method according to any one of [1] to [3],
Defect marking method. [5] Depending on the type of steel sheet, a defect marking detection device
Any one of [1] to [4], wherein the threshold is changed
The defect marking method described in Crab. [6] Ink marker device and defect marking detection device
Set as a set and follow the defect marking position
The defect marker according to any one of [1] to [6],
King way. [7] Install an ink drying device downstream of the ink marker device
According to any one of [1] to [6],
Defect marking method. [8] Ink marker device, defect marking detection device and
Set the defect marking position
Any of [1] to [7], characterized in that
The defect marking method described in Crab.

[9] Surface flaws in a continuous steel sheet processing line
Surface defect meter to detect and mark the defect position with ink
Ink marker device or even defects inside the steel plate
Install an internal defect meter to detect
Surface flaws are detected, and based on the detected flaw information,
Calculate the grade, defect length, and defect position in the width direction.
Harmful defects, difficult-to-identify defects, and harmless defects
In addition, the internal flaw was detected by the internal flaw meter,
Based on the information, the defect length and the defect position in the width direction are calculated,
Furthermore, harmful / harmless defects are identified, and the harmful defects are identified.
・ Tracking of flaw position for each defect
When the defective portion reaches the ink marker device
To mark the defect position with ink, and
At the time of inspection, defect position information in the width direction of the surface defect meter and internal defect meter
The feature is to change the position of defect marking based on
The defect marking method described in to. [10] A table for detecting surface flaws in a continuous steel sheet processing line
Surface defect meter and ink for marking defect positions with ink
Marker devices, or even detect defects inside steel plates
Install an internal defect meter and detect surface flaws on the steel sheet with the surface defect meter
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Mark the recessed position with ink,
Change the position of the defect marking according to the application of the plate.
And a defect marking method.

[11] Surface flaws in a continuous steel sheet processing line
Surface defect meter to detect and mark with defect ink
Ink marker device, or even a chip inside the steel plate.
Set up an internal defect meter to detect defects, and
Detects surface flaws, and based on the detected flaw information,
Calculate the defect grade, defect length, and defect position in the width direction.
Harmful defects, difficult to determine defects, and harmless defects
Also, the internal flaw is detected by the internal flaw meter, and the detected flaw is detected.
Calculates defect length and width defect position based on information
Harmful and non-hazardous defects are identified.
Tracking of defect positions for defects and difficult to determine defects
And the defective portion reaches the ink marker device.
At this point, the defect location is marked with ink.
At that time, harmful defects and difficult to distinguish defects are marked
Defect marking method characterized by carrying out. [12] A table for detecting surface flaws in a continuous steel sheet processing line
Surface defect meter and ink for marking defect positions with ink
Marker devices, or even detect defects inside steel plates
Install an internal defect meter and detect surface flaws on the steel sheet with the surface defect meter
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Mark the recessed position with ink,
Change the threshold of the defect marking detection device according to the type of plate.
Defect marking method characterized by the following.

[13] Surface flaws in the continuous steel sheet processing line
Surface defect meter to detect and mark with defect ink
Ink marker device, or even a chip inside the steel plate.
Set up an internal defect meter to detect defects, and
Detects surface flaws, and based on the detected flaw information,
Calculate the defect grade, defect length, and defect position in the width direction.
Harmful defects, difficult to determine defects, and harmless defects
Further, to detect the internal flaws of the steel plate within the defect meter to detect flaws
Calculates defect length and width defect position based on information
Harmful and non-hazardous defects are identified.
Tracking of defect positions for defects and difficult to determine defects
And the defective portion reaches the ink marker device.
At this point, the defect location is marked with ink.
At that time, ink marker device and defect marking detection
Set the device to follow the defect marking position
A defect marking method, characterized in that: [14] A table for detecting surface flaws in a continuous steel sheet processing line
Surface defect meter and ink for marking defect positions with ink
Marker devices, or even detect defects inside steel plates
Install an internal defect meter and detect surface flaws on the steel sheet with the surface defect meter
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Mark the recessed position with ink.
Install an ink drying device downstream of the ink marker device
A defect marking method.

[15] Surface flaws in a continuous steel sheet processing line
Surface defect meter to detect and mark with defect ink
Ink marker device, or even a chip inside the steel plate.
Set up an internal defect meter to detect defects, and
Detects surface flaws, and based on the detected flaw information,
Calculate the defect grade, defect length, and defect position in the width direction.
Harmful defects, difficult to determine defects, and harmless defects
Also, the internal flaw is detected by the internal flaw meter, and the detected flaw is detected.
Calculates defect length and width defect position based on information
Harmful and non-hazardous defects are identified.
Tracking of defect positions for defects and difficult to determine defects
And the defective portion reaches the ink marker device.
At this point, the defect location is marked with ink.
At that time, ink marker device and defect marking detection
Device and ink drying device as a set,
Defect marking method characterized by following the marking position
Law. [16] Defects identified as difficult to determine by surface defect meter
The inspector makes a re-evaluation of the
Separately, mark the defect position of the harmful defect with ink.
The defect according to any one of [1] to [15],
Fall marking method. [17] Defects identified as difficult to determine by surface defect meter
Alarm output, automatic deceleration and inspection
Characterized by re-determination of difficult-to-identify defects
Defect marking method according to any one of [1] to [16]
Law.

[18] A defect image display and a defect position display are performed when an inspector re-determines a defect identified as a difficult to determine defect by the surface defect meter [16] or [17]. The defect marking method described in 1. [19] The harmful defects and the difficult-to-discriminate defects are distinguished by changing the color of the defect markings [1] to [1].
8] The method of marking defects according to any one of [1] to [8]. [20] The defect marking method according to any one of [1] to [19], wherein the color of the defect marking is changed according to the type of the steel sheet. [21] The defect marking method according to any one of [1] to [20], wherein a marking detection device is installed downstream of the ink marker device to monitor a marking state. [22] The defect marking method according to any one of [1] to [21], wherein a threshold value of a harmful defect or a harmless defect is changed according to a use of the steel sheet. [23] [1] to [22] (provided that [7], [8],
[14], [15] , [19] and [20] ), a polishing member marker device for marking with a polishing member is installed in place of the ink marker device using ink, and polishing is performed instead of marking with ink. A defect marking method characterized by marking with a member. [24] For surface defects, identification of harmful defects, difficult-to-discriminate defects, and harmless defects is performed based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet, Further, regarding the internal flaws, the harmful / harmless defect is identified based on the defect length, the defect position in the width direction, and the use of the steel sheet, according to any one of [9] to [15]. Defect marking method.

[25] Any of the following (1) to (17)
A coil marked with a defect by the method described in
The equipment with the King detection device
The defect information detected by the King detector is used for defect removal work.
Of a coil marked with a defect characterized by
Working method. (1) A surface for detecting surface flaws in a continuous steel sheet processing line
Defect meter and ink marker for marking defect positions with ink
Detecting defects in steel equipment or even steel plates
A part defect meter is installed and the surface defect meter detects surface flaws on the steel sheet.
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Defects characterized by marking the recessed position with ink
Marking method. (2) Regarding surface flaws, harmful defects, difficult to determine defects, harmless
Defect identification is based on the defect name, defect grade, defect length and width
Orientation, defect position on the front and back, and the purpose of the steel sheet.
In addition, for internal flaws,
Identification, defect length, width defect position and steel plate application
The defect marker according to (1), which is performed based on
King way. (3) A surface defect meter or an internal defect meter is provided in advance.
In the line, regarding the surface flaw, the defect name, defect grade,
Calculate the defect length and defect position in the width direction,
Indistinguishable defects are identified or even
To calculate the defect length and defect position in the width direction.
Identify harmful and harmless defects in coils using ink.
A series of steel plates equipped with ink marker devices for marking
Harmful defects and
The harmful defect / difficult to determine
When the defect reaches the ink marker device, the defect
Mark that is marked with ink
King way. (4) Defects identified as difficult to determine by the surface defect meter are
There rows redetermination the Surveyor, harmful defect-harmless defects and the identification
And mark the locations of harmful defects with ink.
The defect mask according to any one of (1) to (3),
Working method. (5) Defects identified as difficult to determine by surface defect meter
And output an alarm and perform automatic deceleration.
Performs re-determination of difficult-to-identify defects (1)
The defect marking method according to any one of (1) to (4). (6) Defects identified as difficult to determine by surface defect meter
The defect image is displayed when the inspector re-determines.
And (4) displaying the defect position.
The defect marking method according to (5). (7) Defect position information in the width direction of the surface defect meter / internal defect meter
The feature is to change the position of defect marking based on
Defect marking according to any one of (1) to (6),
Method. (8) Change the position of the defect marking according to the use of the steel sheet.
In any one of (1) to (7).
On-board defect marking method. (9) Marking to distinguish harmful defects and difficult to determine defects
The method according to any one of (1) to (8),
Defect marking method. (10) Defect markin distinguishes between harmful defects and difficult to determine defects
(1) to (9), wherein the color is changed by changing the color of the
The method for marking defects according to any one of the above. (11) Change the color of the defect marking according to the type of steel sheet.
In any one of (1) to (10).
On-board defect marking method. (12) Defect marking detection downstream of the ink marker device
It is special to monitor the marking status by installing
The defect marker according to any one of (1) to (11)
King way. (13) Defect marking detection device according to the type of steel sheet
(1) to (12), characterized by changing the threshold of
The defect marking method described in the crab. (14) Ink marker device and defect marking detection device
Set to follow the defect marking position
The defect according to any one of (1) to (13),
Marking method. (15) Install an ink drying device downstream of the ink marker device.
In any one of (1) to (14).
On-board defect marking method. (16) Ink marker device and defect marking detection device
And ink drying device as a set,
(1) to (15), characterized in that
The defect marking method according to any one of the above. (17) Depending on the use of the steel sheet, the threshold of harmful defects and harmless defects
Any of (1) to (16), characterized in that the value is changed
The defect marking method described in Crab.

[26] Any of the following (1) to (17)
A coil marked with a defect by the method described in
Charge the equipment with the King detection device and the cleaning means, and
Deletion of defect information detected by the defect marking detection device
Inspections should be reflected in the past
Judgment is made, and when judged to be harmless, mark
Marking characterized by washing the printing ink
Working method of coil. (1) A surface for detecting surface flaws in a continuous steel sheet processing line
Defect meter and ink marker for marking defect positions with ink
Detecting defects in steel equipment or even steel plates
A part defect meter is installed and the surface defect meter detects surface flaws on the steel sheet.
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Defects characterized by marking the recessed position with ink
Marking method. (2) Regarding surface flaws, harmful defects, difficult to determine defects, harmless
Defect identification is based on the defect name, defect grade, defect length and width
Orientation, defect position on the front and back, and the purpose of the steel sheet.
In addition, for internal flaws,
Identification, defect length, width defect position and steel plate application
The defect marker according to (1), which is performed based on
King way. (3) A surface defect meter or an internal defect meter is provided in advance.
In the line, regarding the surface flaw, the defect name, defect grade,
Calculate the defect length and defect position in the width direction ,
Indistinguishable defects are identified or even
To calculate the defect length and defect position in the width direction.
Identify harmful and harmless defects in coils using ink.
A series of steel plates equipped with ink marker devices for marking
Harmful defects and
The harmful defect / difficult to determine
When the defect reaches the ink marker device, the defect
Mark that is marked with ink
King way. (4) Defects identified as difficult to determine by the surface defect meter are
Inspector performs re-judgment and distinguishes between harmful and harmless defects
And mark the locations of harmful defects with ink.
The defect mask according to any one of (1) to (3),
Working method. (5) Defects identified as difficult to determine by surface defect meter
And output an alarm and perform automatic deceleration.
Performs re-determination of difficult-to-identify defects (1)
The defect marking method according to any one of (1) to (4). (6) Defects identified as difficult to determine by surface defect meter
The defect image is displayed when the inspector re-determines.
And (4) displaying the defect position.
The defect marking method according to (5). (7) Defect position information in the width direction of the surface defect meter / internal defect meter
The feature is to change the position of defect marking based on
Defect marking according to any one of (1) to (6),
Method. (8) Change the position of the defect marking according to the use of the steel sheet.
In any one of (1) to (7).
On-board defect marking method. (9) Marking to distinguish harmful defects and difficult to determine defects
The method according to any one of (1) to (8),
Defect marking method. (10) Defect markin distinguishes between harmful defects and difficult to determine defects
(1) to (9), wherein the color is changed by changing the color of the
The method for marking defects according to any one of the above. (11) Change the color of the defect marking according to the type of steel sheet.
In any one of (1) to (20).
On-board defect marking method. (12) Defect marking detection downstream of the ink marker device
It is special to monitor the marking status by installing
The defect marker according to any one of (1) to (11)
King way. (13) Defect marking detection device according to the type of steel sheet
(1) to (12), wherein the threshold value is changed.
The method for marking defects according to any one of the above. (14) Ink marker device and defect marking detection device
Set to follow the defect marking position
The defect according to any one of (1) to (13),
Marking method. (15) Install an ink drying device downstream of the ink marker device.
In any one of (1) to (14).
On-board defect marking method. (16) Ink marker device and defect marking detection device
And ink drying device as a set,
(1) to (15), characterized in that
The defect marking method according to any one of the above. (17) Depending on the use of the steel sheet, the threshold of harmful defects and harmless defects
Any of (1) to (16), characterized in that the value is changed
The defect marking method described in Crab.

[27] A surface defect meter for detecting surface flaws and
Or an internal defect meter that detects internal defects and an
And an ink marker device for marking with
In a continuous steel sheet processing line,
A defect discriminating step of discriminating harmful defects based on the signal;
When the harmful defect reaches the ink marker device,
Marking process to perform ink marking on the device
In both cases, the marking process is performed using a surface defect meter / internal defect.
Based on the defect position information in the width direction of the
The defect marked
Manufacturing method of il. [28] Surface defect meter for detecting surface flaws and / or internal defects
With an internal defect meter that detects the
Continuous processing of a steel plate with an ink marker device
On the processing line, based on the signal from any defect meter
A defect discriminating step of discriminating harmful defects;
Ink marker at the defect position when it reaches the ink marker device.
Marking step,
The marking process depends on the purpose of the steel sheet,
Defect marking characterized by changing the position of the marking
Manufacturing method of coil.

[29] A surface defect meter for detecting surface flaws and
Or an internal defect meter that detects internal defects and an
And an ink marker device for marking with
In a continuous steel sheet processing line,
A defect discriminating step of discriminating harmful defects based on the signal;
When the harmful defect reaches the ink marker device,
Marking process to perform ink marking on the device
In both cases, the marking step is performed according to the type of steel sheet,
Changing the threshold value of the defect marking detection device.
Manufacturing method of coil with defect marking. [30] Surface defect meter for detecting surface flaws and / or internal defects
With an internal defect meter that detects the
Continuous processing of a steel plate with an ink marker device
On the processing line, based on the signal from any defect meter
A defect discriminating step of discriminating harmful defects;
Ink marker at the defect position when it reaches the ink marker device.
Marking step,
The marking process consists of an ink marker device and a defect marker.
Follow the defect marking position by setting the
Characterized by a defect marked coil
Production method.

[31] A surface defect meter for detecting surface flaws and
Or an internal defect meter that detects internal defects and an
And an ink marker device for marking with
In a continuous steel sheet processing line,
A defect discriminating step of discriminating harmful defects based on the signal;
When the harmful defect reaches the ink marker device,
Marking process to perform ink marking on the device
In both cases, the marking step is performed under the ink marker device.
Defect marker characterized by installing an ink drying device in the stream
Manufacturing method of the coil. [32] Surface defect meter for detecting surface flaws and / or internal defects
And internal defects meter for detecting, marking ink to the defect position
Continuous processing of a steel plate with an ink marker device
On the processing line, based on the signal from any defect meter
A defect discriminating step of discriminating harmful defects;
Ink marker at the defect position when it reaches the ink marker device.
Marking step,
The marking process consists of an ink marker device and a defect marker.
Set the defect detection device and the ink drying device as a set
Defect marking characterized by following the marking position
Manufacturing method of the coil. [33] Surface defect meter for detecting surface flaws and / or internal defects
With an internal defect meter that detects the
Continuous processing of a steel plate with an ink marker device
On the processing line, based on the signal from any defect meter
A defect discriminating step of discriminating harmful defects;
Ink marker at the defect position when it reaches the ink marker device.
Marking step,
The defect discrimination process discriminates between harmful defects and defects that are difficult to distinguish,
In the marking process, harmful defects or difficult to determine defects
Marking when it reaches the marker
Marking harmful defects and difficult-to-identify defects
Method of producing coil with defect marking characterized by the following:
Law.

[34] Surface defect meter and / or internal defect in advance
The position of the defect is calculated on the line equipped with the
Mark the coil identified with
Installed on a continuous steel sheet processing line equipped with an ink marker device.
Information on the charging process to be entered and the harmful defects identified in advance.
The harmful defect reaches the ink marker device based on
Mark that marks the defect position with ink
And the marking step,
Based on the defect position information in the width direction of the surface defect meter and internal defect meter
The position of the defect marking is changed
A method of manufacturing a coil with a defect marking. [35] A laser provided with a surface defect meter and / or an internal defect meter in advance.
Position of the defect in-is arithmetic, harmful defect is identified
Ink marker to mark the coil
Charger for charging a continuous steel sheet processing line with equipment installed
Based on the previously identified hazardous defect information
When the harmful defect reaches the ink marker device,
Marking process for marking the defect position with ink
In addition to providing the marking process,
The position of the defect marking is changed accordingly.
Manufacturing method for defective marked coils.

[36] Surface defect meter and / or internal defect
The position of the defect is calculated on the line equipped with the
Mark the coil identified with
Installed on a continuous steel sheet processing line equipped with an ink marker device.
Information on the charging process to be entered and the harmful defects identified in advance.
The harmful defect reaches the ink marker device based on
Mark that marks the defect position with ink
And the marking step,
Depending on the type of steel sheet, the threshold of the defect marking detection device
Characteristic of a coil marked with a defect
Production method. [37] A laser provided with a surface defect meter and / or an internal defect meter in advance.
Calculates the location of the defect and identifies harmful defects
Ink marker to mark the coil
Charger for charging a continuous steel sheet processing line with equipment installed
Based on the previously identified hazardous defect information
When the harmful defect reaches the ink marker device,
Marking process for marking the defect position with ink
And the marking step includes an ink marker.
-Device and defect marking detection device as a set
Defect marker characterized by following the marking position
Manufacturing method of king coil.

[38] Surface defect meter and / or internal defect
The position of the defect is calculated on the line equipped with the
Mark the coil identified with
Installed on a continuous steel sheet processing line equipped with an ink marker device.
Information on the charging process to be entered and the harmful defects identified in advance.
The harmful defect reaches the ink marker device based on
Mark that marks the defect position with ink
And the marking step,
Install an ink drying device downstream of the ink marker device.
Method of producing coil with defect marking characterized by the following
Law. [39] A laser provided with a surface defect meter and / or an internal defect meter in advance.
Calculates the location of the defect and identifies harmful defects
Ink marker to mark the coil
Charger for charging a continuous steel sheet processing line with equipment installed
Based on the previously identified hazardous defect information
When the harmful defect reaches the ink marker device,
Marking process for marking the defect position with ink
And the marking step includes an ink marker.
-Device, defect marking detection device and ink drying device
Set as a set and follow the defect marking position
A method for producing a coil marked with a defect. [40] A laser provided with a surface defect meter and / or an internal defect meter in advance.
Calculates the location of the defect and identifies harmful defects
Ink marker to mark the coil
Charger for charging a continuous steel sheet processing line with equipment installed
Based on the previously identified hazardous defect information
When the harmful defect reaches the ink marker device,
Marking process for marking the defect position with ink
And the coil inserted in the charging step
As for harmful defects and difficult-to-discriminate defects,
In the marking step, harmful defects or defects that are difficult to determine are detected.
Marking when it reaches the ink marker device
In addition, harmful defects and difficult to distinguish defects are marked separately.
Production of coils marked with defects
Method.

[41] Identification of a defect that is difficult to determine with a surface defect meter
Inspectors make a re-evaluation of the found defects,
Identify defects and mark them with ink at the locations of harmful defects.
[33] or [40], characterized in that
The method of manufacturing defects marked coil. [42] Defects identified as difficult to determine by surface defect meter
Alarm output, automatic deceleration and inspection
Characterized in that the worker re-determines the difficult-to-identify defect [3]
3] or the defect marking according to [40] or [41].
Manufacturing method of the manufactured coil. [43] Defects identified as difficult to determine by surface defect meter
Inspection of defect images
[41], which is characterized in that the indication and defect position indication are performed.
Or the coil marked with the defect described in [42].
Construction method. [44] Defect markin distinguishes between harmful defects and difficult to determine defects
[33], [4].
0] to [43].
Coil manufacturing method.

[45] The color of the defect marking is changed according to the type of the steel sheet, [27] to [4].
4] The method for producing a coil marked with a defect according to any one of [4]. [46] The method for producing a defective-marked coil according to any one of [27] to [45], wherein a defect marking detection device is installed downstream of the ink marker device to monitor a marking state. [47] The method of manufacturing a coil with a defect marking according to any one of [27] to [46], wherein the threshold value of the harmful defect is changed according to the use of the steel sheet. [48] [27] to [47] (however, [31], [3]
2], [38], [39] , [44], and [45] ), instead of an ink marker device that uses ink, a polishing member marker device that performs marking with a polishing member is installed, and marking is performed with ink. A method for producing a defect-marked coil, characterized in that marking is performed with a polishing member instead. [49] For surface defects, identification of harmful defects, difficult-to-discriminate defects, and harmless defects is performed based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet, Further, regarding internal flaws, harmful / harmless defects are distinguished based on the length of the defect, the defect position in the width direction, and the use of the steel sheet [27] to [33].
Method of manufacturing coils marked with defects according to any of the above
Law . [50] The method according to [27] or [3], wherein the position of the defect marking is set to a position where blanking is not removed based on the defect position information in the width direction of the surface defect meter / internal defect meter.
4] The method for producing a coil marked with a defect according to [4].

[51] A surface defect meter for detecting surface flaws and
Or an internal defect meter that detects internal defects and an
And an ink marker device for marking with
In a continuous steel sheet processing line,
A defect discriminating step of discriminating harmful defects based on the signal;
When the harmful defect reaches the ink marker device,
Marking with ink that disappears with a weak alkaline detergent
Defect marking characterized by having a marking step
Manufacturing method of the coil. [52] Marking length in the marking step
Is set so that the defect does not fall outside the defect marking.
The defect marking according to [51],
Manufacturing method of coil. [53] Marking line width in the marking step
Is in the range of 3 to 10 mm [5
1] or the coil marked with a defect according to [52].
Manufacturing method. [54] In the marking step, the ink is placed at the defect position.
Press the felt impregnated directly onto the steel plate to
It is characterized by being attached to a steel plate for marking [5
1] to [53].
Manufacturing method of the coil.

[55] In the marking step,
The pressing pressure of the bolt must be in the range of 150 to 500 g.
The defect-marked core according to [54],
Manufacturing method of il. [56] The defect discriminating step includes a harmful defect and a difficult-to-discriminate defect.
And the marking step is performed with harmful defects.
Or when the difficult-to-identify defect reaches the ink marker device
[51] to [5] characterized by marking with
5] The carp described in any one of the above [ 5].
Manufacturing method. [57] Detection of defect marking downstream of the ink marker device
Markin installs a delivery device and checks the marking status
[51] to [5].
6] The carp described in any one of the above.
Manufacturing method. [58] A table for detecting surface flaws in a continuous steel sheet processing line
Surface defect meter and ink for marking defect positions with ink
Marker devices, or even detect defects inside steel plates
Install an internal defect meter and detect surface flaws on the steel sheet with the surface defect meter
Then, based on the detected flaw information, the defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Identify difficult-to-identify defects and harmless defects.
The internal flaw of the steel sheet is detected by the fault gauge, and based on the detected flaw information
To calculate the defect length and defect position in the width direction.
Harmless / harmless defects are identified, and the harmful defects /
Tracking of the defect position for each difficult defect
When the defective portion reaches the ink marker device,
Marking in the fall position with ink that disappears with weak alkaline detergent
The production of coils marked with defects.
Construction method.

[59] Coils whose harmful defects have been identified
Installed an ink marker device for marking
A charging process for charging a continuous steel sheet processing line,
Based on the information on the identified hazardous defect,
When the ink reaches the ink marker device,
Markin marking with ink that disappears with alkaline detergent
Marking process characterized by having a marking process
Coil manufacturing method. [60] A laser provided with a surface defect meter and / or an internal defect meter in advance.
Calculates the location of the defect and identifies harmful defects
Ink marker to mark the coil
Charger for charging a continuous steel sheet processing line with equipment installed
Based on the previously identified hazardous defect information
When the harmful defect reaches the ink marker device, the defect
Mark the position with ink that disappears with a weak alkaline detergent.
Defect marking comprising a marking step
Manufacturing method of king coil. [61] Marking length in the marking step
It is set so that the defect portion is not out of the defect marking
Defect according to [59] or [60], characterized in that:
Manufacturing method of the marked coil. [62] Line width of marking in the marking step
Is in the range of 3 to 10 mm [5
[9] The defective markin according to any one of [61] to [61].
Manufacturing method of the coil. [63] In the marking step, an ink is placed at the defect position.
Press the felt impregnated directly onto the steel plate to
It is characterized by being attached to a steel plate for marking [5
[9] The defective markin according to any one of [62] to [62].
Manufacturing method of the coil.

[64] In the marking step,
The pressing pressure of the bolt must be in the range of 150 to 500 g.
The defect-marked core according to [63], characterized in that
Manufacturing method of il. [65] Regarding the coil inserted in the charging step
Indicates that harmful defects and difficult-to-discriminate defects are discriminated
In the marking step, a harmful defect or a defect
Marking when the ink reaches the ink marker device
Any one of [59] to [64]
4. A method for producing a coil marked with a defect according to claim 1. [66] Detection of defect marking downstream of the ink marker device
Markin installs a delivery device and checks the marking status
[59] to [6], characterized by having a
5] The carp described in any one of the above [5].
Manufacturing method. [67] A surface defect meter or an internal defect meter is provided in advance.
Line, the surface flaw, defect name, defect grade,
Calculate the defect length and defect position in the width direction, and furthermore, harmful defects
・ Differentiable defects are identified or internal flaws
To calculate the defect length and defect position in the width direction.
Identify harmful and harmless defects in coils using ink.
A series of steel plates equipped with ink marker devices for marking
Harmful defects and
The harmful defect / difficult to determine
The defect position when the defect reaches the ink marker device
Then, attach the ink that disappears with a weak alkaline detergent to the steel plate
Marking is characterized by defect marking
Manufacturing method of coil.

[0035]

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described specifically. 1 to 4 show an example of the arrangement of the main equipment of a continuous steel sheet processing line used in the description of the embodiment of the present invention.

In FIG. 1, reference numeral 3 denotes a surface defect meter, which has detectors 2 and a signal processing unit 4 on the front and back of the steel plate 1, and 5 denotes a CR.
T and 6 are centralized control panels, 7 is a secondary judgment input device, 8 is a defect marking device (ink marker device), 9 is a defect marking detection device, 10 is a tension reel, 11 is a transport roll, 12 is a pulse transmitter, 13 is a steel plate transport distance calculating device, 14 is an external storage device, 15 is a cutting machine, and 16 is an inspection table.

FIG. 2 shows a magnetic flaw detector (internal defect meter) 34 having a magnetic sensor 35 for detecting an internal defect of the steel plate 1 and a signal processor 36 in addition to the apparatus shown in FIG. 3 and 4, an ink drying device 40 for drying the marked ink is provided downstream of the defect marking device (ink marker device) 8 of the device shown in FIGS. 1 and 2, respectively.

In the apparatus shown in FIGS. 1 to 4, the detector 2 on the front and back of the steel plate of the surface defect meter 3 detects candidate flaws on the front and back of the steel plate 1 and sends the detected signal to the signal processing unit 4.
The signal processing unit 4 determines a defect name, a defect grade, a defect grade,
Calculation of the defect length and defect position in the width direction is performed.

The magnetic sensor 3 of the magnetic flaw detector 34
At 5, the internal defect of the steel plate 1 is detected, and the detected signal is sent to the signal processing unit 36. The signal processing unit 36 calculates the defect length and the position in the width direction of the defect based on the signal obtained from the feature amount of the defect candidate of the signal exceeding a certain threshold value, and calculates the calculation result as a signal processing unit of the surface defect meter 3. Send to 4.

Also, marking information such as the name of the marking target defect (including the internal defect when the internal defect meter 34 is provided), defect grade, edge dead zone, etc., sent from the host computer 23 for each of the front and back surfaces, and the surface defect A marking command is calculated based on the result calculated based on the defect information detected by the total 3, or further based on the type and use of the steel sheet.

The calculated marking command and the calculated defect information are displayed on the screen of the CRT 5, and a defect occurrence signal, defect information and a defect position are output to the central control panel 6.

Further, the number of revolutions of the transport roll 11 for transporting the steel sheet 1 is measured by the pulse transmitter 12, the steel sheet transport distance calculating device 13 calculates the steel sheet feed length, and outputs the calculation result to the centralized control panel 6. . The centralized control panel 6 edits the defect information, discriminates harmful defects and difficult-to-identify defects (internal defects are harmful defects, the same applies hereinafter) from defect names and defect grades, and, if necessary, Further, harmful defects and difficult-to-discriminate defects are discriminated in consideration of the defect position information on the front and back surfaces and the use of the steel sheet. If necessary, the centralized monitoring panel 6 further determines the presence / absence of marking for the harmful defect / hard-to-discriminate defect that has been discriminated as described above.

The centralized control panel 6 is provided with the steel plate transport distance calculating device 1
The defect position is tracked based on the feed length of the steel sheet sent from 3 and a warning is output to the re-determination location (inspection table) 16 for the arrival of the difficult-to-discriminate defect. If necessary, automatic deceleration is performed, and a defect image is displayed on the CRT 5a, so that the operator can easily determine the defect.

When the defective portion arrives at the secondary determination location (inspection table) 16, the operator visually inspects and makes a secondary determination, checks the detection result of the surface defect meter 3 on the CRT 5, and confirms whether the result is correct. Or not. If the result is different, the correction is performed, the correction result is input to the secondary determination input device 7, and further output to the centralized control panel 6. FIG. 5 is a diagram showing an example of the screen display of the CRT 5. The defect information already displayed is the information of the surface defect meter 3, and the blank is a place to input the secondary judgment result.

The centralized control panel 6 re-edits the defect information based on the correction information, and discriminates harmful defects and difficult-to-discriminate defects from defect names and defect grades. Furthermore, the centralized control panel 6
Based on the feed length of the steel sheet 1 obtained from the rotation speed of the transport roll 11, the position of the harmful defect / difficulty to determine (if marking is determined, the marking is determined to be present) is tracked. Before the defective portion passes through the defect marking device 8, the defect marking device 8 and the defect marking detection device 9 are moved to a position having a defect. Then, when the defective portion passes through the defect marking device 8, an activation signal is output so as to activate the defect marking device 8.

The defect marking device 8 is activated based on the activation signal, and marking is performed on the harmful defect portion / difficult-to-identify defect portion in synchronization with the timing at which the harmful defect / difficult-to-identify defect passes through the defect marking device 8. .

The defect marking device 8 starts marking simultaneously with a marking command. The marking is performed by directly pressing the felt impregnated with the ink against the steel plate 1 and causing the ink to adhere to the steel plate 1. Even a coil coated with oil can be marked on the steel plate surface. Further, since there is no problem of shading such as paint, there is no generation of a press flaw on the surface of the steel sheet. Since the felt comes into direct contact with the steel plate 1 and wears, if the felt is marked beyond the reference length, the central control panel 6
Will output a warning to alert workers to change felt.

The marking length is set in consideration of the tracking accuracy of the defect position so that the defective portion does not go outside the defect marking. In this apparatus, in consideration of the tracking accuracy, 0.5 m is added to each of the front and rear of the defect length discriminated by the centralized control panel 8, and a command is output so as to mark 1 m longer than the defect length. In the case of a point-like defect having a length of about several mm or less, a command is output to add 0.25 m before and after each point to perform marking.

It is more desirable to determine the length of the marking by an agreement with the purchaser. In addition, the central control panel 6
Monitors the allowable number of markings and the allowable marking length as other management items, and outputs an abnormal alarm to the alarm device 24 when these become equal to or larger than the allowable values.

The host computer 23 manages each coil based on the information from the centralized control panel 6 and determines whether or not it can be shipped.

FIG. 6 is a diagram showing a state of a defect portion position and a defect marking position.
Within the display range in the length direction.

The line width of the marking is optimally in the range of 3 to 10 mm from the viewpoint of easy detection by visual inspection and easy detection by the defect marking detection device 9. Further, the felt pressing pressure is 15
The range of 0-500 g is optimal.

Although the number of the defect marking device 8 may be one,
It is desirable that two inks are provided and two kinds of inks are prepared so that the color of the marking can be changed.

By providing two defect marking devices 8 and preparing two types of ink, the color of the ink is changed in accordance with the defect grade (for example, when the harmful defect of the purchaser is clear, red ink is used. Marking is performed and defects that are difficult to determine are marked with blue ink.) Or, change the color of the ink according to the type of steel sheet (for example, use black ink for steel sheets with a white background such as electrogalvanized steel sheets). In the case of a black steel plate such as an alloyed hot-dip galvanized steel plate, the marking is performed with white ink.) When performing the defect identification work, more efficient work becomes possible. Also, in press working, etc., the defect marking part may be blanked out even though there is a defect, so the defect marking is placed at any position in the width direction of the steel sheet regardless of the location of the harmful defect part. It is preferable that the marking can be performed. In any case, it is necessary to select an ink that disappears with a weak alkaline detergent. However, depending on the use of the steel sheet, there is a case where it does not need to be erased by a weak alkaline detergent.

In the case of marking with ink as described above, there is no problem if the ink dries, but normal ink requires several seconds to dry. If the ink has not dried, the ink will transfer to the roll or coil. If the oil is applied before the ink dries, the ink does not dry forever, and the ink is transferred when the coil is wound on a tension reel. The above problem can be surely solved by installing an ink drying device for drying the marked ink downstream of the ink marker device.

FIG. 7 is a diagram showing a case where one defect marking device 8 and one defect marking detection device 9 are provided. The defect marking device 8 and the defect marking detection device 9 are arranged at the same position in the width direction of the steel plate 1 on the gantry 25, and are moved by a motor 27 to a position in the width direction of the steel plate indicated by the marking command. It can be moved through.

FIG. 8 is a diagram showing a case where two defect marking devices and two defect marking detection devices are provided. The defect marking device 8a and the defect marking detection device 9a, the defect marking device 8b and the defect marking detection device 9b
The racks 25a and 25b are arranged at the same position in the width direction of the steel plate 1 and can be moved independently of each other in the width direction of the steel plate as in the case of the apparatus of FIG.

FIGS. 9 and 10 are diagrams showing an ink drying device installed downstream of the defect marking device. In FIG. 9, the defect marking device 8 and the ink drying device 40
In FIG. 10, the defect marking device 8, the ink drying device 40, and the defect marking detection device 9 are disposed at the same position on the gantry 25 in the width direction of the steel plate 1. In any device, the motor 2 is located at the position in the width direction of the steel sheet specified by the marking command.
7 can be moved via a moving device 26 which is driven.

Defect marking device 8 and ink drying device 4
Alternatively, two or more defect marking detection devices 9 may be installed. In FIG. 11, the defect marking device 8a, the ink drying device 40a, and the defect marking device 8b
And the ink drying device 40 are mounted on the frames 25a, 25, respectively.
12 is disposed at the same position in the width direction of the steel plate 1. In FIG. 12, the defect marking device 8 a and the ink drying device 4
8a, the defect marking detection device 9a, the defect marking device 8b , the ink drying device 40b, and the defect marking detection device 9b are arranged at the same position in the width direction of the steel plates 1 of the gantry 25a, 25b, respectively. As in the case, they can be moved independently of each other in the width direction of the steel sheet.

FIG. 13 shows an example of a defective portion and a defective marking position in a case where marking is performed using one defect marking device. It is indicated by 21.

FIG. 14 shows a case in which two defect marking devices are provided and marking is performed using inks of different colors.
Due to (for example, red), the difficult-to-identify defect 22 is displayed with a defect marking 21b (for example, blue).

The defect marking detection device 9 constantly monitors the state of the defect marking, monitors the marking length, ink blurring, the presence or absence of a marking in a non-defective area, and outputs the monitoring result to the central control panel 6. In order to improve the detection accuracy of the defect marking, it is preferable to correct the threshold value of the defect marking detection device according to the type of the steel sheet. The centralized control panel 6 judges the quality of the marking.
4 to call attention to the operator and instruct the customer to suspend the shipment of the coil. Take measures such as re-inspection for the coil whose shipment has been suspended.

When the defect marking monitored by the defect marking detecting device 9 is judged to be normal, the defect information and the defect position are inputted to the external storage device 14 and the defect information and the defect position are reversed after being cut by the cutting machine 15. Unfolding, that is, converting the position from the inner circumference of the coil to the position from the outer circumference, and printing out.

Since the coil is cut by the cutting machine 15 for each purchaser, the length of the coil is based on the cutting signal from the cutting machine 15. Documents to be sent to the purchaser are developed in reverse, starting from the outer peripheral side of the coil, to make it easier for the purchaser to utilize.

Since the position of the harmful defect is clearly marked in this manner, the presence of the harmful defect can be easily determined at the time of removal of the harmful defect in the next step or rewinding of the coil during processing by the purchaser. Will be able to

In the above description, the visual inspection of the operator is involved in the judgment of the harmful defect. However, the visual inspection may not be performed as long as the defect detection accuracy of the surface defect meter 3 can be satisfied. Further, by installing the defect marking detection device in the next step of the marked coil, it is possible to perform a more accurate and efficient defect removal operation.

In the apparatus shown in FIGS. 1 to 4, the surface defect meter 3 or the magnetic flaw detector 34, the defect marking device 8, and the defect marking detecting device 9 are arranged on the same line. However, as described above, in a line provided with a surface defect meter or a further internal defect meter, based on the flaw information detected by the surface defect meter or the further internal defect meter, the position of the defect, the defect name and the defect grade are determined. It has already been performed to calculate, display this information on a CRT or the like, or print out the information on a document.

Therefore, at least one of the defect marking device and the defect marking detecting device is installed on a line different from the line provided with the surface defect meter or the internal defect meter, and the surface defect meter or the internal defect meter is provided. Harmful defects and difficult-to-identify defects are identified on the line, and based on this information, marking on the defect position and confirmation of the defect marking are performed on the another line, as in the case of the apparatus of FIGS. May be printed out as a document.

In this case, the harmful defect / difficult-to-identify defect information edited and discriminated on the line provided with the surface defect meter or the internal defect meter together with the defect position information is transferred to the centralized control panel of another line via the external storage device. Output, track the harmful defects / defects difficult to identify on another line, perform marking with the defect marking device, monitor the status of the defect marking with the defect marking detection device, and re-edit the monitoring result with the central control panel. Output to an external storage device.
By doing so, the effects of the present invention can be achieved with less expensive equipment.

In this case, examples of arrangement of the main equipment of another line are shown in FIGS. FIG. 15 shows a case where the oiler 17 is disposed downstream of the defect marking detection device 9.
FIG. 17 shows a case in which a trimmer 18 and an inspection table 16 are provided on the upstream side of the marking device 8 and a defect marking detection device 9 is provided on the downstream side. . In the case of FIG. 17, if necessary, the result of the visual inspection of the defect on the inspection table can be secondarily corrected in the same manner as in the case of FIGS.

An example of working on a marked coil will be described with reference to FIGS.

FIG. 18 shows a recoil line which is a lower process of the continuous line. In addition to the defect marking detection device 9, a cleaning liquid jetting device 32 and a cleaning liquid wiping device 33 are additionally provided. When the defect marking detection device 9 detects a defect marking of a defect that is difficult to determine, a line stop command is output, and the inspector performs a re-determination. The inspector classifies harmful defects and harmless defects. If it is determined that the mark is harmless, the cleaning liquid spraying device 32 sprays a weak alkaline cleaning liquid to wash off the marking, and then the cleaning liquid wiping device 33 wipes off the cleaning liquid and the marking ink to reapply oil. The defective and difficult-to-identify defects are re-determined, and the nicks and harmful defects determined to be harmful defects are removed by the cutting machine 15 and only the non-defective coils are removed from the tension reel 10.
Take up with.

FIG. 19 shows a shear line. The sheet having no defect marking is sent to the non-defective piler 29, and when the defect marking detection device 9 installed on the entrance side of the sheet line detects the defect marking, it outputs to the gate switching device 28, and the gate switching device 28 switches the gate. The sheet having the defect marking portion is sent to the defective product pillar 30 to remove the harmful defect portion and the difficult-to-identify defect portion.

For the steel plate to be pressed, it is preferable to adopt a marking method in consideration of the application. FIG. 20 and FIG. 21 are diagrams showing examples of defect marking in the case of inspecting the harmful defect portion 20 visually after pressing. FIG.
In the case of 0, the defect marking 21 is performed on the defective portion 20, and FIG. The position of the defect marking may be appropriately determined according to the defect information in the width direction and the use of the steel sheet.

In the above, the case where the ink marker device is installed in the defect marking device 8 and the defect position is marked, or the defect-marked coil is further worked has been described. A member marking device may be provided to mark a defect position with a polishing member.

In a defect marking apparatus using a polishing member, a polishing member such as a grindstone attached to the tip of a cylinder or a nonwoven fabric containing an abrasive is directly pressed against the steel plate 1 or pressed against the steel plate 1 while rotating a brush roll. To mark.

In the case of a defect marker device using a polishing member, the response of the marking is somewhat inferior to that of the ink marker device. In consideration of the fact that the color cannot be changed, except for performing the marking display according to the defect clade, the same defect marking as in the case of using the ink marker device, the operation of the coil with the defect marking is possible. .

When a polishing member is used, it is preferable that the marking length is slightly longer than the marking length using ink in consideration of tracking accuracy and responsiveness. Specifically, 0.5 m to 1.0 m are added before and after to the defect length discriminated by the centralized control panel 8, respectively, and 1 m to 2 m from the defect length.
Outputs a command for long marking. In the case of a point defect having a length of about several mm or less, a command is output so as to add 0.25 m to 1.0 m before and after, respectively, to perform marking. The line width of the marking is optimally in the range of 50 to 200 mm from the viewpoint of easy detection by visual inspection and easy detection by the defect marking detection device 9. FIG.
FIG. 4 is a diagram illustrating a state of a defect portion position and a defect marking position.

When two ink marker devices are installed,
As shown in FIG. 14, the color of the ink was changed according to the defect grade. However, when a polishing member is used, the color cannot be changed. When two polishing member marker devices are installed, change the marking line according to the defect grade. By performing marking, the same operation as the ink marker device can be performed.

FIG. 23 shows an example of a defective portion and a defective marking position when marking is performed using two polishing member marker devices. The harmful defect portion 20 is indicated by one defect marking 21a, and the difficult-to-identify defect 22 is indicated by two defect markings 21b.

When defect marking is performed using a polishing member, there is no problem of shading such as paint, so that no pressing flaw is generated on the surface of the steel sheet, and even if the coil is coated with oil, the surface of the steel sheet is reliably formed. Can be marked. Further, oiling may be performed immediately after the marking, and a drying device such as the case of marking with ink is not required, so that a simpler device can be obtained.

When the marking is performed using a brush roll on the grinding member, a brush roll capable of marking the entire width of the steel plate may be provided as necessary, and the marking may be performed over the entire width of the steel plate.

[0084]

As described above, according to the present invention, harmful defects can be reliably and easily formed without generating flaws on the steel plate by defect marking and regardless of whether or not oil such as rust-preventive oil adheres to the surface of the steel plate. Defect marking can be performed , and coils with defect marking can be manufactured.
You.

Further, by tracking the defect position on the surface of the steel sheet and marking the harmful defect portion, the purchaser can easily detect the defect portion. In addition, the harmful defect portion can be rolled and shipped with a required coil length, thereby improving the work efficiency of the purchaser.

Further, the marking display method is changed in accordance with the degree of defect, or the appropriate marking display is performed in consideration of the defect name, the degree of defect, and the use of the steel sheet.

By using the ink marker device, a defect marking color is displayed in consideration of the background color of the steel sheet according to the type of the steel sheet, so that the effect of improving the work efficiency and preventing the defect from being overlooked can be improved. Excellent.

By using the grinding member marker device, even if the coil is coated with oil, the surface of the steel plate can be reliably marked, and oil can be coated immediately after the marking.
Furthermore, since a drying device as in the case of marking with ink is not required, a simpler device can be obtained.

Further, the work of removing the harmful defect portion is facilitated and the work efficiency is greatly improved for the steel plate maker, and the excess defect removal work is not required even for the defect which is difficult to determine, thereby improving the yield.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of the arrangement of essential equipment of a first steel sheet coiling line according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of the arrangement of main components of a second steel sheet coiling line according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of the arrangement of essential equipment of a third steel sheet coiling line according to an embodiment of the present invention.

FIG. 4 is a diagram showing an example of arrangement of main facilities of a fourth steel sheet coiling line according to an embodiment of the present invention.

FIG. 5 illustrates an example of a CRT display screen.

FIG. 6 is a diagram showing a state of a defect portion position and a defect marking position.

FIG. 7 is a diagram showing an example of equipment arrangement when one defect marking device and one defect marking detection device are provided.

FIG. 8 is a diagram showing an example of equipment arrangement when two defect marking devices and two defect marking detection devices are provided.

FIG. 9 is a diagram showing an example of equipment arrangement when one defect marking device and one ink drying device are provided.

FIG. 10 is a diagram showing an example of a facility arrangement in a case where one defect marking device, one defect marking detection device, and one ink drying device are provided.

FIG. 11 shows a defect marking device and an ink drying device, each of which is 2
The figure which shows the example of the equipment arrangement | positioning at the time of providing.

FIG. 12 is a diagram of equipment arrangement when two defect marking devices, two defect marking detection devices, and two ink drying devices are provided.

FIG. 13 is a diagram showing an example in which a defect is marked using one defect marking device.

FIG. 14 is a diagram showing an example in which harmful defects and difficult-to-discriminate defects are separately marked using two defect marking devices.

FIG. 15 is a diagram showing an example of arrangement of main facilities of a line including a defect marking device and a defect marking detection device.

FIG. 16 is a diagram showing an example of an arrangement of main components of another line including a defect marking device and a defect marking detection device.

FIG. 17 is a diagram showing an example of the arrangement of main facilities of a line including an inspection table and a defect marking detection device in addition to the defect marking device and the defect marking detection device.

FIG. 18 is a diagram showing an example of arrangement of main facilities of a coiling line including a defect marking detection device.

FIG. 19 is a diagram showing an example of arrangement of main facilities of a shear line including a defect marking detection device.

FIG. 20 is a diagram showing an example in which defect marking is performed on a defective portion.

FIG. 21 is a diagram showing an example in which defect marking is performed at the same location on both sides in the width direction of the steel sheet, regardless of the location of the defective portion.

FIG. 22 is a diagram showing a state of a defect portion position and a defect marking position.

FIG. 23 is a diagram showing an example in which harmful defects and difficult-to-discriminate defects are separately marked using two defect marking devices.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel plate 2 Detector 3 Surface defect meter 4 Signal processing part 5, 5a CRT 6 Centralized control panel 7 Secondary judgment input device 8, 8a, 8b Defect marking device 9, 9a, 9b Defect marking detection device 10 Tension reel 11 Transport roll Reference Signs List 12 pulse transmitter 13 steel plate transport distance calculation device 14 external storage device 15 cutting machine 16 inspection table 17 oiler 18 trimmer 19 payoff reel 20 harmful defect 21, 21a, 21b defect marking 22 difficult-to-discriminate defect 23 upper-level computer 24 alarm device 25, 25a , 25b gantry 26 moving device 27 motor 28 gate switching device 29 non-defective Piler 30 defective Piler 31 steel plate transport length display 32 cleaning liquid injection device 33 cleaning liquid wiping device 34 magnetic flaw detector (internal defect meter) 35 magnetic sensor 36 signal processing unit 40 , 4 a, 40b ink drying device

────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masahiro Iwabuchi 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Kozo Harada 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Inside (72) Inventor Shinichi Asanaga 1-1-2 Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Shigemi Fukuda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (56) References JP-A-2-259454 (JP, A) JP-A-5-196581 (JP, A) JP-A-2-38953 (JP, A) JP-A-3-118912 (JP, A) JP-A-4-145349 (JP, A) JP-A-61-245045 (JP, A) JP-A-52-96084 (JP, A) JP-A-62-249039 (JP, A) JP-A-49-73356 (JP, A) JP, A) Shokai Sho 57-4 743 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01N 21/84-21/958 B21C 51/00

Claims (67)

(57) [Claims] 1. A line provided with a surface defect meter or an internal defect meter in advance to calculate a defect name, a defect grade, a defect length, and a defect position in the width direction of a surface defect, and furthermore, a harmful defect and a defect which is difficult to determine. Identified, or further, for internal flaws, calculate the length of the defect, the defect position in the width direction, and furthermore, the coil where the harmful defect / harmless defect is identified, the ink marker device for marking the coil with ink Loading the continuous processing line, and marking the defect position with ink at the time when the harmful defect / difficult-to-identify defect reaches the ink marker device based on the information of the harmful defect / difficult-to-identify defect identified in advance. A defect marking method. 2. The defect marking method according to claim 1, wherein the position of the defect marking is changed based on the defect position information in the width direction of the surface defect meter and the internal defect meter. 3. The defect marking method according to claim 1, wherein the position of the defect marking is changed according to the use of the steel sheet. 4. The defect marking method according to claim 1, wherein marking is performed by distinguishing between harmful defects and defects that are difficult to determine. 5. The defect marking method according to claim 1, wherein a threshold value of the defect marking detection device is changed according to a type of the steel sheet. 6. The defect marking method according to claim 1, wherein an ink marker device and a defect marking detection device are set as a set and follow the defect marking position. 7. The defect marking method according to claim 1, wherein an ink drying device is provided downstream of the ink marker device. 8. The defect marking according to claim 1, wherein an ink marker device, a defect marking detection device, and an ink drying device are set to follow a defect marking position. Method. 9. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel plate, are installed on a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and identifies harmful defects, difficult-to-discriminate defects, and harmless defects. Done, also
The internal defect meter detects the internal flaw of the steel sheet, calculates the defect position in the length and width directions of the defect based on the detected flaw information, and further identifies harmful defects and harmless defects. For difficult defects, each defect position is tracked, and when the defective portion reaches the ink marker device, the defect position is marked with ink, and at that time, the defect position in the width direction of the surface defect meter and the internal defect meter is measured. 3. The defect marking method according to claim 1, wherein the position of the defect marking is changed based on the information. 10. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel sheet, are installed in a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel sheet, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At this time, a defect marking method characterized by changing the position of the defect marking according to the use of the steel sheet. 11. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel plate, are installed on a continuous steel sheet processing line. Detects the surface flaws on the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel sheet, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At this time, a defect marking method characterized by distinguishing harmful defects and difficult-to-identify defects. 12. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel plate, is installed in a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel sheet, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At this time, a defect marking method characterized by changing a threshold value of a defect marking detection device according to a type of a steel sheet. 13. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel sheet, are installed on a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel sheet, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At this time, a defect marking method, wherein an ink marker device and a defect marking detection device are set so as to follow a defect marking position. 14. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel plate, is installed on a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel sheet, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At that time, a defect marking method, wherein an ink drying device is installed downstream of the ink marker device. 15. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel plate, is installed on a continuous steel sheet processing line. Detects the surface flaws of the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel plate, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further identifying harmful defects and harmless defects, for the harmful defects and difficult to determine defects, tracking the position of each flaw, and marking the defect position with ink when the defective portion reaches the ink marker device, At this time, a defect marking method comprising setting an ink marker device, a defect marking detection device, and an ink drying device so as to follow a defect marking position. 16. An inspector re-determines a defect identified as a difficult-to-identify defect by a surface defect meter, identifies the defect as a harmful defect or a harmless defect, and marks the defect position of the harmful defect with ink. The defect marking method according to any one of claims 1 to 15, wherein: 17. A defect which is output as a warning and automatically decelerates for a defect identified by the surface defect meter as a defect which is difficult to determine, and an inspector re-determines the defect which is difficult to determine. Item 17. The defect marking method according to any one of Items 16. 18. A defect image display and a defect position display when an inspector re-determines a defect identified as a difficult-to-identify defect by the surface defect meter. The described defect marking method. 19. The method according to claim 1, wherein harmful defects and difficult-to-discriminate defects are distinguished by changing the color of the defect marking.
19. The defect marking method according to claim 18. 20. The method according to claim 1, wherein the color of the defect marking is changed according to the type of the steel sheet.
The defect marking method according to any one of the above items. 21. The defect marking method according to claim 1, wherein a defect marking detection device is installed downstream of the ink marker device to monitor a marking state. 22. The defect marking method according to claim 1, wherein a threshold value of a harmful defect or a harmless defect is changed according to a use of the steel sheet. 23. In Claims 1 to 22 (excluding Claims 7, 8 , 14 , 15 , 19 and 20 ),
A defect marking method, comprising: installing a polishing member marker device for marking with a polishing member in place of an ink marker device using ink, and performing marking with a polishing member instead of marking with ink. 24. For surface defects, identification of harmful defects, difficult-to-discriminate defects, and harmless defects is performed based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet. In addition, for internal flaws,
The defect marking method according to any one of claims 9 to 15, wherein the identification of the harmless defect is performed based on a defect length, a defect position in a width direction, and a use of the steel sheet. 25. A coil which has been subjected to defect marking by the method according to any one of the following (1) to (17) is loaded into a facility provided with a defect marking detection device, and a defect detected by the defect marking detection device is provided. A method of operating a coil with a defect marked, wherein information is reflected in a defect removing operation. (1) Install a surface defect meter for detecting surface flaws and an ink marker device for marking defects at positions on the continuous processing line of steel sheets with an ink, or an internal defect meter for detecting defects inside the steel sheet. Detects surface flaws on the steel sheet, and based on the detected flaw information, the defect name, defect grade,
Calculate the defect length, defect position in the width direction, further identify harmful defects, difficult-to-identify defects, and harmless defects, detect internal flaws in the steel sheet with an internal defect meter, and based on the detected flaw information, The length of the defect, the defect position in the width direction is calculated, furthermore, harmful defects and harmless defects are identified, and for the harmful defects and difficult to determine defects, the defect positions are tracked. A defect marking method, wherein the defect position is marked with ink at the time of arrival. (2) For surface defects, identification of harmful defects, difficult-to-identify defects, and harmless defects is performed based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet. The defect marking method according to (1), wherein harmful defects and harmless defects are identified for internal flaws based on the defect length, the defect position in the width direction, and the use of the steel sheet. (3) Calculate the defect name, defect grade, defect length, and defect position in the width direction for the surface flaws on the line provided with the surface defect meter or the internal defect meter in advance, and
Install an ink marker device that identifies defects that are difficult to distinguish, or calculates defect positions in the length and width directions of defects for internal flaws, and marks coils that have been identified as harmful or harmless with ink. Into the continuous processing line for
A defect marking method, wherein the defect position is marked with ink when the harmful defect / difficult-to-identify defect reaches an ink marker device, based on information about the difficult-to-identify defect. (4) Defects identified as difficult to determine by the surface defect meter are
The defect marking method according to any one of (1) to (3), wherein the inspector performs re-determination, distinguishes between harmful defects and harmless defects, and marks the positions of the harmful defects with ink. (5) For a defect identified as a difficult-to-identify defect by the surface defect meter, an alarm is output, automatic deceleration is performed, and the inspector re-determines the difficult-to-identify defect.
The defect marking method according to any one of (1) to (4). (6) The defect described in (4) or (5), wherein the inspector performs a defect image display and a defect position display when the inspector re-determines a defect identified as a difficult to determine defect by the surface defect meter. Defect marking method. (7) The defect marking method according to any one of (1) to (6), wherein the position of the defect marking is changed based on defect position information in the width direction of the surface defect meter and the internal defect meter. (8) The defect marking method according to any one of (1) to (7), wherein the position of the defect marking is changed according to the use of the steel sheet. (9) The defect marking method according to any one of (1) to (8), wherein marking is performed by distinguishing between harmful defects and defects that are difficult to determine. (10) The harmful defects and the difficult-to-discriminate defects are distinguished by changing the color of the defect marking (1) to (9).
The method for marking defects according to any one of the above. (11) The defect marking method according to any one of (1) to (10), wherein the color of the defect marking is changed according to the type of the steel sheet. (12) The defect marking method according to any one of (1) to (11), wherein the marking state is monitored by installing a defect marking detecting device downstream of the ink marker device. (13) The defect marking method according to any one of (1) to (12), wherein the threshold value of the defect marking detection device is changed according to the type of the steel sheet. (14) The defect marking method according to any one of (1) to (13), wherein a set of the ink marker device and the defect marking detection device is set to follow the defect marking position. (15) The defect marking method according to any one of (1) to (14), wherein an ink drying device is installed downstream of the ink marker device. (16) The defect marking method according to any one of (1) to (15), wherein an ink marker device, a defect marking detection device, and an ink drying device are set to follow the defect marking position. (17) The defect marking method according to any one of (1) to (16), wherein the threshold value of the harmful defect and the harmless defect is changed according to the use of the steel sheet. 26. A coil which is defect-marked by the method according to any one of the following (1) to (17) is charged into a facility provided with a defect marking detecting device and a cleaning means, and the coil is subjected to the defect marking detecting device. A defect-marked coil characterized in that the detected defect information is reflected in the defect removal work, and the inspector re-determines the difficult-to-identify defect, and when it is determined to be a harmless defect, the marking ink is washed by a cleaning means. Working method. (1) Install a surface defect meter for detecting surface flaws and an ink marker device for marking defects at positions on the continuous processing line of steel sheets with an ink, or an internal defect meter for detecting defects inside the steel sheet. Detects surface flaws on the steel sheet, and based on the detected flaw information, the defect name, defect grade,
Calculate the defect length, defect position in the width direction, further identify harmful defects, difficult-to-identify defects, and harmless defects, detect internal flaws in the steel sheet with an internal defect meter, and based on the detected flaw information, The length of the defect, the defect position in the width direction is calculated, furthermore, harmful defects and harmless defects are identified, and for the harmful defects and difficult to determine defects, the defect positions are tracked. A defect marking method, wherein the defect position is marked with ink at the time of arrival. (2) For surface defects, identification of harmful defects, difficult-to-identify defects, and harmless defects is performed based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet. The defect marking method according to (1), wherein harmful defects and harmless defects are identified for internal flaws based on the defect length, the defect position in the width direction, and the use of the steel sheet. (3) Calculate the defect name, defect grade, defect length, and defect position in the width direction for the surface flaws on the line provided with the surface defect meter or the internal defect meter in advance, and
Install an ink marker device that identifies defects that are difficult to distinguish, or calculates defect positions in the length and width directions of defects for internal flaws, and marks coils that have been identified as harmful or harmless with ink. Into the continuous processing line for
A defect marking method, wherein the defect position is marked with ink when the harmful defect / difficult-to-identify defect reaches an ink marker device, based on information about the difficult-to-identify defect. (4) Defects identified as difficult to determine by the surface defect meter are
The defect marking method according to any one of (1) to (3), wherein the inspector performs re-determination, distinguishes between harmful defects and harmless defects, and marks the positions of the harmful defects with ink. (5) For a defect identified as a difficult-to-identify defect by the surface defect meter, an alarm is output, automatic deceleration is performed, and the inspector re-determines the difficult-to-identify defect.
The defect marking method according to any one of (1) to (4). (6) The defect described in (4) or (5), wherein the inspector performs a defect image display and a defect position display when the inspector re-determines a defect identified as a difficult to determine defect by the surface defect meter. Defect marking method. (7) The defect marking method according to any one of (1) to (6), wherein the position of the defect marking is changed based on defect position information in the width direction of the surface defect meter and the internal defect meter. (8) The defect marking method according to any one of (1) to (7), wherein the position of the defect marking is changed according to the use of the steel sheet. (9) The defect marking method according to any one of (1) to (8), wherein marking is performed by distinguishing between harmful defects and defects that are difficult to determine. (10) The harmful defects and the difficult-to-discriminate defects are distinguished by changing the color of the defect marking (1) to (9).
The method for marking defects according to any one of the above. (11) The defect marking method according to any one of (1) to (20), wherein the color of the defect marking is changed according to the type of the steel sheet. (12) The defect marking method according to any one of (1) to (11), wherein the marking state is monitored by installing a defect marking detecting device downstream of the ink marker device. (13) The threshold (1) to (12), wherein the threshold value of the defect marking detection device is changed according to the type of steel sheet.
The method for marking defects according to any one of the above. (14) The defect marking method according to any one of (1) to (13), wherein a set of the ink marker device and the defect marking detection device is set to follow the defect marking position. (15) The defect marking method according to any one of (1) to (14), wherein an ink drying device is installed downstream of the ink marker device. (16) The defect marking method according to any one of (1) to (15), wherein an ink marker device, a defect marking detection device, and an ink drying device are set to follow the defect marking position. (17) The defect marking method according to any one of (1) to (16), wherein the threshold value of the harmful defect and the harmless defect is changed according to the use of the steel sheet. 27. A continuous steel sheet processing line provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects and an ink marker device for marking a defect position with ink. A defect discriminating step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of performing ink marking at a defect position when the harmful defect reaches the ink marker device, wherein the marking step includes: A method for manufacturing a defect-marked coil, comprising changing a position of a defect marking based on defect position information in a width direction of the defect meter / internal defect meter. 28. A continuous steel sheet processing line in which a surface defect meter for detecting a surface flaw and / or an internal defect meter for detecting an internal defect and an ink marker device for marking a defect position with ink are provided. A defect discrimination step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of ink marking a defect position when the harmful defect reaches the ink marker device, wherein the marking step is performed using a steel plate. A method of manufacturing a coil with a defect marking, wherein the position of the defect marking is changed according to the use of the coil. 29. A continuous processing line for a steel sheet provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects, and an ink marker device for marking a defect position with ink. A defect discrimination step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of ink marking a defect position when the harmful defect reaches the ink marker device, wherein the marking step is performed using a steel plate. A method of manufacturing a coil having a defect marked thereon, wherein the threshold value of the defect marking detection device is changed according to the type of the coil. 30. A continuous steel sheet processing line provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects, and an ink marker device for marking a defect position with ink. A defect discriminating step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of performing ink marking at a defect position when the harmful defect reaches the ink marker device, wherein the marking step is performed using an ink. A method for manufacturing a defect-marked coil, comprising setting a marker device and a defect marking detection device as a set and following the defect marking position. 31. A continuous processing line for a steel sheet provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects, and an ink marker device for marking a defect position with ink. A defect discriminating step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of performing ink marking at a defect position when the harmful defect reaches the ink marker device, wherein the marking step is performed using an ink. A method for producing a defect-marked coil, comprising installing an ink drying device downstream of a marker device. 32. A continuous processing line for a steel plate provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects, and an ink marker device for marking a defect position with ink. A defect discriminating step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of performing ink marking at a defect position when the harmful defect reaches the ink marker device, wherein the marking step is performed using an ink. A method for manufacturing a coil having a defect marked thereon, wherein a marker device, a defect marking detection device, and an ink drying device are set so as to follow a defect marking position. 33. A continuous steel sheet processing line in which a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects and an ink marker device for marking a defect position with ink are provided. A defect discrimination step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of ink marking a defect position when the harmful defect reaches the ink marker device, The defect discrimination step includes: Distinguishing harmful defects and difficult-to-discriminate defects, the marking step performs marking when the harmful defects or the difficult-to-discriminate defects reach the ink marker device, and performs marking by distinguishing harmful defects and difficult-to-discriminate defects. A method of manufacturing a coil with a defect marking. 34. A continuous steel sheet provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect in a line provided with a surface defect meter and / or an internal defect meter in advance. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The method of manufacturing a defect-marked coil, wherein the marking step changes a position of the defect marking based on information on a defect position in a width direction of the surface defect meter and the internal defect meter. 35. A continuous steel plate provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect on a line provided with a surface defect meter and / or an internal defect meter in advance. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The method of manufacturing a coil with a defect marking, wherein the marking step changes a position of the defect marking according to a use of the steel sheet. 36. A continuous steel sheet provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect on a line provided with a surface defect meter and / or an internal defect meter in advance. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The method of manufacturing a coil with a defect marking, wherein the marking step changes a threshold value of a defect marking detection device according to a type of a steel sheet. 37. A continuous steel sheet provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect in advance using a line provided with a surface defect meter and / or an internal defect meter. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The method of manufacturing a defective-marked coil, wherein the marking step comprises setting an ink marker device and a defect marking detection device as a set and following the defect marking position. 38. A continuous steel sheet provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect in advance using a line provided with a surface defect meter and / or an internal defect meter. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The method of manufacturing a defective-marked coil, wherein the marking step includes installing an ink drying device downstream of the ink marker device. 39. A continuous steel sheet provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect in advance using a line provided with a surface defect meter and / or an internal defect meter. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. The marking step includes a step of setting an ink marker device, a defect marking detection device, and an ink drying device so as to follow a defect marking position. 40. A continuous steel sheet provided with an ink marker device for marking a coil, in which a harmful defect is identified, with ink by previously calculating the position of the defect on a line provided with a surface defect meter and / or an internal defect meter. A charging step of charging the processing line, and a marking step of marking the defect position with ink when the harmful defect reaches the ink marker device, based on information of the harmful defect identified in advance. Regarding the coil loaded in the loading step, harmful defects and difficult-to-discriminate defects are discriminated, and in the marking step, marking is performed when the harmful defects or the difficult-to-discriminate defects reach the ink marker device. A method for producing a defect-marked coil, wherein marking is performed by distinguishing between harmful defects and difficult-to-identify defects. 41. An inspector re-determines a defect identified as a hard-to-identify defect by the surface defect meter, identifies the defect as a harmful defect or a harmless defect, and marks the defect position of the harmful defect with ink. 41. The method for producing a defect-marked coil according to claim 33 or claim 40. 42. An inspector performs re-determination of a hard-to-identify defect while outputting an alarm and automatically decelerating a defect identified as a hard-to-identify defect by the surface defect meter. 42. The method for producing a coil with a defect marking according to claim 40 or 41. 43. The inspector according to claim 41 or claim 42, wherein a defect image display and a defect position display are performed when an inspector re-determines a defect identified as a difficult to determine defect by the surface defect meter. A method for producing a coil marked with a defect as described. 44. The method according to claim 3, wherein harmful defects and difficult-to-discriminate defects are distinguished by changing the color of the defect marking.
3. The method for manufacturing a defect-marked coil according to claim 1. 45. The defect marking color is changed according to the type of steel sheet.
5. The method for manufacturing a coil having a defect marked therein according to any one of the above items 4. 46. A coil with a defect marking according to claim 27, wherein a defect marking detection device is installed downstream of the ink marker device to monitor a marking state. Manufacturing method. 47. The method according to claim 27, wherein the threshold value of the harmful defect is changed according to the use of the steel sheet. 48. claims 27 to claim 47 (except Claim 31,32,38,39, except 44 and 45), the abrasive member marker marking the polishing member in place of the ink marker device using the ink A method for producing a defect-marked coil, comprising installing an apparatus and marking with a polishing member instead of marking with ink. 49. For surface flaws, harmful defects, difficult-to-discriminate defects, and harmless defects are identified based on the defect name, defect grade, defect length, defect position in the width direction, defect position on the front and back surfaces, and the use of the steel sheet. In addition, for internal flaws,
The defect marking according to any one of claims 27 to 33, wherein the identification of the harmless defect is performed based on the defect length, the defect position in the width direction, and the use of the steel sheet.
Coil manufacturing method . 50. The position of the defect marking is set to a position where blanking is not removed based on defect position information in the width direction of the surface defect meter and the internal defect meter.
A method for producing a coil with a defect marking according to claim 7 or 34. 51. A continuous steel sheet processing line provided with a surface defect meter for detecting surface flaws and / or an internal defect meter for detecting internal defects, and an ink marker device for marking a defect position with ink. A defect discriminating step of discriminating a harmful defect based on a signal from the defect meter, and a marking step of marking the defect position with ink that disappears with a weak alkaline detergent when the harmful defect reaches the ink marker device. A method for producing a coil marked with a defect. 52. The method according to claim 51, wherein the marking length in the marking step is set so that the defective portion does not come out of the defect marking. 53. The method according to claim 51, wherein the line width of the marking in the marking step is in a range of 3 to 10 mm. 54. The marking step according to claim 51, wherein the felt impregnated with the ink is directly pressed against the steel plate at the defect position to cause the ink to adhere to the steel plate for marking. A method for producing a coil marked with a defect according to any one of claims. 55. The method according to claim 54, wherein the pressing force of the felt in the marking step is in a range of 150 to 500 g. 56. The defect discriminating step discriminates a harmful defect from a difficult-to-discriminate defect, and the marking step performs marking when a harmful defect or a difficult-to-discriminate defect reaches the ink marker device. 56. The method for producing a defect-marked coil according to any one of items 51 to 55. 57. The apparatus according to claim 5, further comprising a marking confirmation step of installing a defect marking detection device downstream of the ink marker device to confirm a marking state.
57. The method of manufacturing a coil with a defect marking according to any one of claims 1 to 56. 58. A surface defect meter for detecting a surface flaw and an ink marker device for marking a defect position with ink, or an internal defect meter for detecting a defect inside a steel sheet, are installed on a continuous steel sheet processing line. Detects the surface flaws on the steel sheet with a meter, calculates the defect name, defect grade, defect length, and defect position in the width direction based on the detected flaw information, and further identifies harmful defects, difficult-to-discriminate defects, and harmless defects. In addition, the internal defect meter detects the internal flaw of the steel plate, and calculates the defect length and the defect position in the width direction based on the detected flaw information.
Further harmful defects and harmless defects are identified, the harmful defects and difficult-to-discriminate defects are each tracked for the position of the defect, and when the defective portion reaches the ink marker device, the defect position disappears with a weak alkaline detergent. A method for producing a coil with defect marking, characterized by marking with ink. 59. A method according to claim 59, wherein the coil in which the harmful defect is identified comprises:
A charging step of charging a continuous processing line of a steel sheet provided with an ink marker device for marking with ink, and, based on information of a previously identified harmful defect, a defect when the harmful defect reaches the ink marker device. Marking at a position with ink that disappears with a weak alkaline detergent. 60. A continuous steel plate provided with an ink marker device for marking a coil in which a harmful defect has been identified by calculating the position of the defect in advance on a line provided with a surface defect meter and / or an internal defect meter. A charging step of charging the processing line, and marking based on information of the harmful defect identified in advance, where the harmful defect reaches the ink marker device at the defect position with ink that disappears with a weak alkaline detergent. And manufacturing a coil with a defect marking. 61. The method according to claim 59, wherein the marking length in the marking step is set so that a defective portion does not go outside the defect marking. Method. 62. The coil according to claim 59, wherein a line width of the marking in the marking step is in a range of 3 to 10 mm. Production method. 63. The marking step according to claim 59, wherein in the marking step, felt impregnated with ink is directly pressed against the steel sheet to attach the ink to the steel sheet to perform the marking. A method for producing a coil marked with a defect according to any one of claims. 64. The method according to claim 63, wherein the pressing pressure of the felt in the marking step is in a range of 150 to 500 g. 65. A coil inserted in the loading step is discriminated from a harmful defect and a difficult-to-discriminate defect, and in the marking step, the harmful defect or the difficult-to-identify defect reaches the ink marker device. 65. The method of manufacturing a coil with a defect marking according to any one of claims 59 to 64, wherein marking is performed at a point in time. 66. The apparatus according to claim 5, further comprising a marking confirmation step of installing a defect marking detection device downstream of the ink marker device to confirm a marking state.
66. The method of manufacturing a coil with a defect marking according to any one of claims 9 to 65. 67. A line provided with a surface defect meter or an internal defect meter in advance, calculates a defect name, a defect grade, a defect length, and a defect position in a width direction for a surface defect, and furthermore, deletes a harmful defect / difficult defect Is identified, or further, for the internal flaw, the length of the defect, the defect position in the width direction is calculated,
In addition, coils with harmful and harmless defects identified
It is inserted into a continuous processing line of steel plates equipped with an ink marker device for marking with ink, and based on information on harmful defects and difficult-to-discriminate defects identified in advance, the harmful defects and
A method of manufacturing a defect-marked coil, characterized in that when a hard-to-identify defect arrives at an ink marker device, a mark is applied by attaching an ink that disappears with a weak alkaline detergent to a steel plate at the defect position.