WO2022070534A1

WO2022070534A1 - Method for processing metal strip, mark application method, and mark printing device

Info

Publication number: WO2022070534A1
Application number: PCT/JP2021/024510
Authority: WO
Inventors: 善太牧
Original assignee: Ｊｆｅスチール株式会社
Priority date: 2020-09-29
Filing date: 2021-06-29
Publication date: 2022-04-07
Also published as: JP2022056158A; EP4223429A1; JP7028296B1; MX2023003642A

Abstract

The present invention is to execute precise reprinting of a mark in a processing line different from a processing line in which printing has been carried out. A metal strip is subjected to processing in a plurality of processing lines. The present invention comprises: a step for printing a defect mark (K) on a metal strip, in a first processing line; a step for printing a plurality of reference marks (S) aligned at equal intervals along the longitudinal direction of the metal strip, in the first processing line or a processing line upstream from the first processing line; in a downstream second processing line, a step for cutting a metal strip portion to which a first position identification mark has been applied, and after the cutting step, a step for reprinting the defect mark (K) on the metal strip in the same position in the longitudinal direction as the position of the defect mark (K); and in the second processing line, a step for detecting at least one of the plurality of reference marks (S) before applying the defect mark (K), and correcting tracking information for applying the defect mark (K) on the basis of position information for the detected reference mark.

Description

Metal strip processing method, mark applying method, and mark printing device

The present invention relates to a technique for sequentially processing a metal strip on a plurality of processing lines, such as a cold-rolled steel sheet manufacturing processing line. The present invention is, in particular, a technique characterized in a position tracking method between a plurality of processing lines.

As a conventional position tracking process, for example, there is a technique described in Patent Document 1.
In Patent Document 1, in a steel thin plate continuous processing line, a point tracking system using welding points and a method of calculating a transfer position and a coil length based on a detected value of a roll rotation speed using a PLG (pulse generator) are used. ing.

Japanese Unexamined Patent Publication No. 7-3217

In tracking by PLG, there is a possibility that a deviation (error) due to slippage or the like between the conveyed steel plate and the detection roll may occur. Therefore, there is a possibility that a deviation between the measured value by one processing line and the measured value by another processing line, that is, a deviation in the tracking position may occur.
In Patent Document 1, the deviation caused by the slip of the metal band is corrected at the welding point. However, when the coil length shift occurs, the shift remains until the welding point with the next coil. Therefore, in Patent Document 1, even if the amount of each deviation is small, the deviation of the tracking position becomes large when slipping occurs a plurality of times. Therefore, in the next processing line, there is a problem that a longitudinal error exceeding the allowable length may occur at the tracking position.

Here, in the processing line where electroplating is applied to the steel sheet with the defect mark, the amount of plating adhered to the edge of the steel sheet tends to increase due to the concentration of current. Therefore, trimming of the edge portion is required to improve the quality. However, at the customer's site, there is a possibility that the portion of the metal band with the defect mark also uses a portion other than the defective portion. Therefore, it is preferable to print the defect mark as close to the edge portion as possible. Therefore, when the edge portion having an excessive amount of plating adhered is cut off, the defect mark (position specifying mark) already printed on the edge portion is also cut off at the same time. Therefore, it is necessary to reprint the defect mark on the metal strip on the processing line for cutting the edge portion.

However, in the past, there is a possibility that the tracking position between the processing lines is deviated by a predetermined value or more. For this reason, if printing is executed on another processing line based on the printing results of the coil longitudinal position based on the tracking position on one processing line, the printing position will be greatly displaced due to the deviation amount due to the above slipping or the like. Become.
For this reason, in the case of reprinting a mark that requires accuracy such as defect printing, it has conventionally been necessary to manually print it.

Here, if the defect mark is printed on the inside in the width direction to be trimmed, it is considered that there is no need for reprinting. However, in general, the required edge printing accuracy is, for example, 2 mm, which is stricter than the meandering amount in the processing line. In contrast to the meandering of the metal band, printing on the edge can be made to always stand by at the edge of the metal band within an accuracy of 2 mm by moving the mark printing device main body using an edge tracking device. However, the trimmer cannot move the main body. Therefore, it is considered possible to reprint on the edge after cutting the edge with a trimmer. However, it is not realistic to leave a defect print before trimming. Therefore, at present, reprinting is executed after cutting the edge.

The present invention has been made by paying attention to the above points, and an object of the present invention is to accurately reprint a mark on a processing line different from the printed processing line.

In order to solve the problem, one aspect of the present invention is a method for processing a metal band in which the same metal band is sequentially processed by a plurality of processing lines, and a first processing line selected from the plurality of processing lines. Then, in the step of imparting the first position specifying mark to the metal band and the processing line upstream of the first processing line or the first processing line, in the longitudinal direction with respect to the metal band. In the process of adding a plurality of reference marks arranged along the line with a predetermined rule and the second processing line which is a processing line downstream of the first processing line, the first position specifying mark is added. After the step of cutting the metal band portion and the step of cutting the metal band, a second position specifying mark is given to the metal band at the same position as the first position specifying mark in the longitudinal direction. And, in the second processing line, at least one of the plurality of reference marks is detected before the second position specifying mark is given, and based on the position information of the detected reference marks, the second The gist is to provide a process of calibrating tracking information for adding a position identification mark.

Further, an aspect of the present invention is a method for treating a metal band in which the same metal band is sequentially treated by a plurality of treatment lines, and the metal band is a first treatment line selected from the plurality of treatment lines. In the step of imparting the first position specifying mark to the metal band and the processing line upstream of the first processing line or the first processing line, the metal band is predetermined along the longitudinal direction. In the process of adding a plurality of reference marks arranged in a regular manner and in the second processing line which is a processing line downstream of the first processing line, the metal band to which the first position specifying mark is added. A step of cutting the portion and a step of adding a second position specifying mark to the metal band at the same position in the longitudinal direction as the first position specifying mark are provided after the cutting step. The longitudinal position of the first position specifying mark is associated with the reference mark selected from the plurality of reference marks, and in the second processing line, the first position is based on the position information of the selected reference mark. The gist is to specify the position in the longitudinal direction of the specific mark and determine the position where the second position specifying mark is applied.

Further, an aspect of the present invention is a marking method for imparting a mark to the metal strip when sequentially treating the same metal strip with a plurality of treatment lines, and the first aspect selected from the plurality of treatment lines. In the processing line 1, a first position specifying mark for specifying a position is attached to the metal band, and the metal band is marked on the first processing line or a processing line upstream of the first processing line. A second processing line, which is a processing line downstream of the first processing line, is provided with a plurality of reference marks arranged with a predetermined rule along the attached longitudinal direction, and the first processing line is described above. A second position identification mark is given at a position where the position identification mark and the position in the longitudinal direction are the same, and when the second position identification mark is given, based on the position of the reference mark selected from the plurality of reference marks. The gist is that the position to attach the second position specifying mark is determined by specifying the position in the longitudinal direction of the first position specifying mark.

Further, in the embodiment of the present invention, when the same metal band is sequentially treated by a plurality of treatment lines, the second treatment line selected from the plurality of treatment lines is upstream from the second treatment line. A mark giving device for giving a second position specifying mark at a position where the position in the longitudinal direction of the metal strip is the same as the first position specifying mark given in the first processing line of the above. A reference mark printing device that is arranged on the processing line or a processing line upstream of the first processing line and prints a reference mark on a metal band, and a predetermined rule along the longitudinal direction with respect to the metal band. A reference mark printing processing unit that executes a process of printing a plurality of reference marks lined up with a characteristic via the reference mark printing device, a reference mark selected from the plurality of reference marks, and the first position identification. A related information acquisition unit that obtains related information associated with a mark, a mark detection unit that is provided on the second processing line and detects a reference mark, and a mark detecting unit that is arranged on the second processing line and is formed on a metal strip. From the reprinting device that gives the second position identification mark, the related information obtained by the related information acquisition unit, and the position information of the reference mark detected by the mark detection unit, the metal band of the first position identification mark. The gist is to include a reprinting processing unit that specifies a longitudinal position and executes a process of printing the second position specifying mark via the reprinting device based on the identified longitudinal position. do.

According to the aspect of the present invention, the position tracking deviation is compensated (calibrated) by the reference marks arranged in the longitudinal direction according to a certain rule. As a result, according to the aspect of the present invention, it is possible to accurately print at the same position in the longitudinal direction on different processing lines. That is, according to the aspect of the present invention, the tracking deviation can be suppressed to a small size. Therefore, according to the aspect of the present invention, it is possible to automatically perform the printing process that has been manually performed when reprinting at the same position.

It is a figure explaining the equipment structure of the 1st processing line which concerns on embodiment based on this invention. It is a top view explaining the arrangement of a printing apparatus. It is a figure explaining the structure of the 1st processing control part. It is a figure exemplifying 11 groups of print record data. It is a figure which shows the printing example corresponding to FIG. It is a figure exemplifying 11 groups of print record data. It is a figure explaining the equipment structure of the 2nd processing line which concerns on embodiment based on this invention. It is a figure explaining the structure of the 2nd processing control part. It is a figure which shows the printing example corresponding to FIG. It is a figure which shows the example of reprint. It is a figure explaining a comparative example.

Next, an embodiment of the present invention will be described with reference to the drawings.
The present embodiment relates to a metal strip treatment method and treatment equipment for sequentially treating the same metal strip (such as a steel plate) with a plurality of treatment lines. In the present embodiment, a processing line for producing a metal strip, particularly a processing line for producing a cold-rolled steel sheet, will be described.
However, the present invention is not limited to the processing line for manufacturing the metal strip. This is applicable as long as it is a processing facility that processes the same metal band in order on a plurality of processing lines.

In the present embodiment, a case where the metal band is processed while rewinding the coiled metal band and the metal band is wound again in each processing line will be described as an example. Therefore, the metal band may be expressed as a coil. The present invention is applicable even when the metal band is not wound in each processing line.
Further, in the present specification, the longitudinal direction refers to the longitudinal direction (transportation direction) of the metal band to be processed.
In the present embodiment, at least a plurality of processing lines include a first processing line and a second processing line.

The first processing line is a processing line that performs processing for attaching the first position specifying mark to the metal band. The second processing line is a processing line downstream from the first processing line. The second processing line is a processing line for performing a process of attaching a second position specifying mark to a position having the same position in the longitudinal direction as the first position specifying mark. In the present embodiment, the first position specifying mark is a defect mark indicating the position in the longitudinal direction of the defect having in the metal band. The second position specifying mark is a mark obtained by reprinting the defect mark. The first position specifying mark and the second position specifying mark do not have to be marks having the same shape.
There may be one or more other processing lines between the first processing line and the second processing line. In the present embodiment, the first processing line is a processing line for electroplating processing.
The first processing line does not have to be a processing line for electroplating processing.

(First processing line)
As shown in FIG. 1, as the equipment configuration of the first processing line, a payoff reel 1, a tension reel 2, a PLG 3, a plating processing unit 4, a defect inspection device 5, a printing device 6, and a first line control unit 7 are provided. ..

<Payoff reel 1 and tension reel 2>
The payoff reel 1 and the tension reel 2 execute rewinding / winding processing of the metal band 10 as a coil, and the metal band 10 is conveyed from the payoff reel 1 to the tension reel 2. There is.

<Plating process unit 4>
The plating processing unit 4 is arranged on the upstream side of the defect inspection device 5, and executes a process of adhering plating to the surface of the metal band 10.

<PLG3>
The PLG 3 including an encoder and the like detects the rotation speed of the roller that rotates with the transportation of the metal band 10, and supplies the detection signal to the first line control unit 7.

<Defect inspection device 5>
The defect inspection device 5 is a device for detecting defects on the surface or inside of the conveyed metal band 10, and when the defects are detected, the defect detection signal is supplied to the first line control unit 7.

<Printing device 6>
The printing device 6 is arranged on the downstream side of the defect inspection device 5. As shown in FIG. 2, the printing device 6 includes a defect mark printing device 6A and a reference mark printing device 6B.

[Printing device for defect mark 6A]
The defect mark printing device 6A of the present embodiment is arranged, for example, on the operator side (hereinafter, also referred to as OP side) of the metal band 10. Then, the defect mark printing device 6A ejects ink to the OP side end portion of the metal band 10 based on the print signal from the first line control unit 7 to print the defect mark K.

[Printing device for reference mark 6B]
The reference mark printing device 6B of the present embodiment is arranged, for example, on the drive side (hereinafter, also referred to as the DR side) of the metal band 10. Then, the reference mark printing device 6B injects ink onto the DR side end portion of the metal band 10 based on the printing signal from the first line control unit 7, and sequentially prints the reference mark S. That is, in the present embodiment, the defect mark K is printed on one end of the metal band 10 in the width direction, and the reference mark S is printed on the other end.
Here, the OP side is the operator side in the width direction of the metal band 10. The DR side refers to the side opposite to the OP side, and refers to the equipment side in the width direction of the metal band 10.

<First line control unit 7>
The first line control unit 7 is composed of a PLC (program logic controller) or the like. As shown in FIG. 3, the first line control unit 7 includes a first position tracking unit 7A, a defect mark printing processing unit 7B, and a reference mark printing processing unit 7C.

<First position tracking unit 7A>
The first position tracking unit 7A executes a known tracking process for detecting the line speed of the metal band 10 and the position in the longitudinal direction from the tip of the metal band 10 based on the detection signal from the PLG3, and positions the position. Calculate tracking information.

<Defect mark printing processing unit 7B>
When the defect detection signal from the defect inspection device 5 is input, the defect mark printing processing unit 7B acquires the longitudinal position of the defect detection position based on the position tracking information by the first position tracking unit 7A. Further, the defect mark printing processing unit 7B supplies a print signal to the defect mark printing device when the defect detection position in the longitudinal direction reaches the printing position by the defect mark printing device 6A based on the line speed. The defect mark printing processing unit 7B supplies a printing signal in consideration of the operation delay. As a result, the defect mark K is printed on the OP side end of the metal band 10.
The defect mark printing processing unit 7B outputs the printing record data 11 of the printing of the defect mark K via the defect mark printing device 6A to the database 8. Each print record data 11 includes, for example, data of a mark type and a print position which is longitudinal position information of the metal band 10.

<Reference mark printing processing unit 7C>
Further, the reference mark printing processing unit 7C performs processing based on the tracking information from the first position tracking unit 7A and the line speed of the metal band 10. That is, the reference mark printing processing unit 7C sequentially outputs a printing signal to the reference mark printing device 6B so that the reference mark S is printed at equal intervals along the longitudinal direction from a predetermined reference position. The predetermined reference position is a reference position in the longitudinal direction separated from the tip of the unwinding of the metal band 10 by a preset distance. As a result, the reference marks S are sequentially imparted to the DR side ends of the metal strip 10 at equal intervals (for example, every 10 m) along the longitudinal direction. The plurality of reference marks S may not be printed at equal intervals, and may be printed so as to be lined up with a predetermined rule along the longitudinal direction.

The reference mark printing processing unit 7C outputs the printing record data 11 of the printing of the reference mark S via the reference mark printing device 6B to the database 8. Each print record data 11 includes, for example, data of a mark type and a print position which is position information in the longitudinal direction.
Here, it is preferable to add identification information for identifying each reference mark S to the plurality of reference marks S. As the identification information, ascending order numbers can be exemplified in the order of printing.

Here, the processing line for printing the plurality of reference marks S may be a line on the upstream side of the first processing line.
When the processing line for printing the plurality of reference marks S and the processing line for printing the defect mark K are the same line (first processing line), the following configuration is preferable. That is, as shown in FIG. 2, it is preferable that the defect mark printing device 6A and the reference mark printing device 6B face each other in the width direction of the metal band 10 with the transport direction of the metal band 10 interposed therebetween. However, when the processing line for printing the plurality of reference marks S and the processing line for printing the defect mark K are the same line, for example, the following configuration is used. That is, it is not necessary to simultaneously perform the process of printing the defect mark by the defect mark printing device 6A and the process of printing the reference mark by the reference mark printing device 6B. Either of them may be executed first as long as it is in the same line (first processing line). This is because, within the same processing line, there is no relative deviation between the position information of the defect mark and the position information of the reference mark in the longitudinal position, or the deviation is slight.

It should be noted that, due to the influence of slippage and the like, the tracking information on each line is deviated by, for example, about 3%. This leads to a deviation of about 30 m at 1000 m, for example.
The plurality of reference marks S are arranged at equal intervals, for example, along the longitudinal direction of the metal band 10. Therefore, for example, since the first or last reference mark S can be printed close to the longitudinal end portion of the metal band 10, the information accuracy of the tracking position is high. Here, it is assumed that the defect mark K is added to the processing lines after the processing line to which the reference mark S is added. In this case, if the printing position of the defect mark K is specified while calibrating the tracking position at the position of the reference mark S, the relative relationship between the reference mark S and each defect mark K in the longitudinal direction is in an accurate state. Become.

(Upper computer 9)
The higher-level computer 9 is a higher-level computer than the first line control unit 7 and the second line control unit 26 described later. The host computer 9 is provided with a related information acquisition unit 9A.

<Related information acquisition unit 9A>
The related information acquisition unit 9A is started after the processing on the first processing line is completed. As shown in FIG. 4, the related information acquisition unit 9A executes a process of arranging the print record data 11 in the database 8 in ascending order using the position in the longitudinal direction as a key, and creates the print record data group 12. FIG. 4 shows a case where the final end of the coil is cut by a cutting device (not shown). The processing record data of the cut position is also obtained as a part of the print record data 11. Here, the print result data group 12 shown in FIG. 4 is an example in which the defect mark K and the reference mark S as shown in FIG. 5 are attached to the metal band 10.

As a result, each defect mark K can be associated with one or more reference marks S selected from the plurality of reference marks S.
At this time, for example, when identification information is given to the reference mark S, the reference mark S for specifying the position of the defect mark K may be given a symbol to that effect with respect to the print record data group 12. For example, as the reference mark S, a number for identification may be printed together with the mark itself. As the numbers to be printed, for example, a counter is used, and the numbers are changed in ascending or descending order each time printing is performed.

Further, it may separately have a data group of information on the reference mark S for specifying the position of the defect mark K and information on the separation distance from the reference mark S to the target defect mark K.
The reference mark S for specifying the position of the defect mark K does not have to be the reference mark S closest to the defect mark K.
Here, it is assumed that an odd number of other processing lines intervenes between the first processing line and the second processing line. In this case, the rewinding direction of the coil constituting the metal band 10 is the same in the first processing line and the second processing line.

On the other hand, it is assumed that there is no other processing line or an even number of other processing lines intervenes between the first processing line and the second processing line. In this case, the directions of the coils to be processed are opposite in the first processing line and the second processing line. Therefore, the unwound outer side of the coil processed by the first processing line is the axis of the coil processed by the second processing line.
In this case, the process of arranging the print record data 11 in the database 8 in descending order using the position in the longitudinal direction as a key is executed. Then, as shown in FIG. 6, the process of converting the print position to the position in the longitudinal direction from the coil tip side is executed to create the print record data group 12. In this case, the shear cut position at the tail end of the first processing line becomes the tip end at the second processing line.
The process of the related information acquisition unit 9A may be executed by the first line control unit 7 and the second line control unit 26 described later.

(Second processing line)
As shown in FIG. 7, as the equipment configuration of the second processing line, the payoff reel 20, the tension reel 21, the PLG 22, the print mark recognition device 23, the trim device 24, the reprint device 25, and the second line control unit 26 are included. Be prepared.

<Payoff reel 20 and tension reel 21>
The payoff reel 20 and the tension reel 21 execute a rewinding / winding process of the metal band 10 as a coil. The metal strip 10 is configured to be conveyed from the payoff reel 20 toward the tension reel 21.

<PLG22>
The PLG 22 including an encoder or the like detects the rotation speed of the roller that rotates with the transportation of the metal band 10, and supplies the detection signal to the second line control unit 26.

<Print mark recognition device 23>
The print mark recognition device 23 constitutes a mark detection unit. The print mark recognition device 23 is composed of an image pickup element such as a camera, detects a reference mark S attached to the surface of the metal band 10, and outputs a detection signal to the second line control unit 26. At this time, a counter for recognition may be provided, and the counter may be made smaller or larger each time the reference mark S is made to improve the degree of discrimination of the detected reference mark S.

<Trim device 24>
The trim device 24 of the present embodiment is arranged on both sides of the metal band 10 in the width direction, and continuously cuts both end edges of the conveyed metal band 10. The trim device 24 of the present embodiment is performed before reprinting by the reprinting device 25.
It is assumed that the defect mark is reprinted only on one end side in the width direction. In this case, the trim device may be arranged on the downstream side of the reprint device 25, and the end portion on the reference mark S side (DR side) may be cut off after reprinting. The trim device is a trim device that cuts off the end portion on the reference mark S side (DR side) on the other end side.
In the present embodiment, in order to reprint the defect mark on both ends in the width direction, both ends are cut together.
Here, it is also conceivable to perform the cutting process by the trim device 24 after the reprint by the reprint device 25. However, in this case, reprinting is performed inside the printing of the defect mark on the first processing line. However, in metal strips subjected to such processing, it is not necessary to put a reference mark, and in many cases, reprinting is not necessary. Further, if reprinting is performed before cutting the end portion, there is a problem that the cutting width becomes larger than necessary.

<Reprinting device 25>
The reprinting device 25 of the present embodiment reprints the defect mark K, which is the second position specifying mark, by injecting ink onto the end portion of the metal band 10 based on the printing signal from the second line control unit 26. Print.

<Second line control unit 26>
The second line control unit 26 is composed of a PLC (program logic controller) or the like. As shown in FIG. 8, the second line control unit 26 includes a second position tracking unit 26A and a reprint processing unit 26B.

<Second position tracking unit 26A>
The second position tracking unit 26A executes a known tracking process for detecting the line speed of the metal band 10 and the position in the longitudinal direction from the tip portion of the metal band 10 based on the detection signal from the PLG 22, and positions the position. Calculate tracking information.
The second position tracking unit 26A of the present embodiment refers to the created print record data group 12 each time a print detection signal from the print mark recognition device 23 is input. Then, the second position tracking unit 26A calibrates the position information (tracking information) in the longitudinal direction obtained by detecting the PLG 22 of the corresponding reference mark S at the longitudinal position of the print record data 11, thereby providing information on the tracking position. Improve the accuracy of.

<Reprint processing unit 26B>
The reprint processing unit 26B refers to the created print record data group 12 based on the position tracking information by the second position tracking unit 26A. Then, the reprint processing unit 26B determines whether the longitudinal position of the print record data 11 with respect to the next defect mark K comes to the print position by the reprint device 25 in the longitudinal direction. After making such a determination, the reprint processing unit 26B supplies a print signal to the reprint device 25. The print signal is supplied in consideration of the operation delay. As a result, the defect mark K is reprinted on the trimmed OP side end portion of the metal band 10.

Alternatively, when the reprint processing unit 26B inputs the detection signal of the reference mark S from the print mark recognition device 23, the reprint processing unit 26B refers to the created print record data group 12. The reprint processing unit 26B determines whether the detected reference mark S is the previous reference mark S on the upstream side of the print record data 11 for the next defect mark K. When the detected reference mark S is the previous reference mark S on the upstream side of the print record data 11 for the next defect mark K, the reprint processing unit 26B performs the next processing. That is, the reprint processing unit 26B identifies the position in the longitudinal direction of the defect mark K from the position information of the reference mark S detected by the print mark recognition device 23 and the print record data group 12. Then, the reprint processing unit 26B supplies a print signal to the reprint device 25 based on the line speed. In this process, it is determined that the position obtained by adding the separation distance from the reference mark S to the defect mark K to the longitudinal position of the determined mark position in the longitudinal direction comes to the printing position by the reprinting device 25. Run. The print signal is supplied in consideration of the operation delay. As a result, the defect mark K is reprinted on the cut OP side end portion of the metal band 10.

(Operation and others)
In the present embodiment, as shown in FIG. 5, reference marks S are printed at equal intervals on the DR side end of the metal band 10 in the first processing line. Further, in the first processing line, the defect mark K is printed on the OP side of the metal band 10. Further, in the first processing line, the print record data 11 of the defect mark K and the plurality of reference marks S are sequentially stored in the database 8.
The plurality of print record data 11 stored in the database 8 are sorted in ascending or descending order using the position in the longitudinal direction as a key to form the print record data group 12 (see FIGS. 4 and 6).

Further, in the embodiment, the reference mark S is detected in the second processing line, and the position tracking information is proofread with the print position information in the print record data 11 of the detected reference mark S. This proofreads the print misalignment. As a result, the accuracy of the position tracking information with respect to the defect mark K position in the second processing line is improved.
Further, in the second processing line, after trimming the OP side end portion of the metal band 10, the defect mark K is reprinted at the same position in the longitudinal direction as the printed defect mark K.
At this time, the position in the longitudinal direction to be reprinted is specified with reference to the position of the reference mark S.
Here, it is assumed that the orientations of the coils in the longitudinal direction on the first processing line and the second processing line are the same. In this case, based on the print record data group 12, as shown in FIG. 5, the reprint position of the defect mark K is the distance LA in the longitudinal direction from the reference mark S on the upstream side of the target defect mark K. Can be identified.

On the other hand, it is assumed that the orientations of the coils in the longitudinal direction on the first processing line and the second processing line are reversed. In this case, as shown in FIG. 9, the reprinting position of the defect mark K can be specified by the separation distance LB in the longitudinal direction from the reference mark S on the upstream side of the target defect mark K. Since the distance L0 between the adjacent reference marks S already exists, the separation distance LB can be obtained by setting L0-LA = LB.
As shown in FIG. 10, the defect mark K as the second position specifying mark is reprinted at the position advanced by the separation distance LA or LB from the tracking position of the reference mark S selected from the plurality of reference marks S. do. In FIG. 10, the defect mark K is reprinted on both the left and right ends, but reprinting may be performed on only one side. In FIG. 10, reference numeral 10A indicates an excised portion of the end portion of the metal band 10.

Alternatively, in the present embodiment, in the second processing line, while proofreading the tracking information with the reference mark S, the reprinting position in the longitudinal direction is specified and reprinted based on the printing record of the defect mark K.
Here, it is also theoretically possible to detect the defect mark K printed on the first processing line on the second processing line and print it at the same position in the longitudinal direction of the steel sheet as the defect mark K without printing the plurality of reference marks S. Is possible. However, there is a possibility that the defect mark K has not been seen or over-examined.

It is for the following reasons. When the print mark is detected at the line speed, the camera cannot recognize the type of the mark, so only the presence or absence of printing is detected. Therefore, when the defect marks K are densely continuous as shown in FIG. 11, there is a possibility that a plurality of marks are recognized as one mark and a part of the defect marks K is not detected. Further, there is a possibility that the dirt 30 is recognized as the defect mark K and over-tested. When such two identification abnormalities occur, for example, the defect mark K shifts by one. For this reason, the defect type and the print mark are different for all the defects after the mark that caused the identification abnormality, which causes a serious quality abnormality.

On the other hand, in the present embodiment, the defect mark K can be reprinted based on the distance from the reference mark S by using a plurality of reference marks S arranged according to a predetermined rule. Therefore, it is possible to reduce the possibility of unseen due to the denseness of the defect marks K. Further, it is possible to prevent the dirt 30 from being recognized as the defect mark K.
Further, in the present embodiment, the reference mark S is printed at a fixed interval such as a fixed length interval. Therefore, the deviation of the interval for each reference mark S is small, and it is possible to mask the area other than the vicinity of the mark printing portion. Therefore, it is possible to prevent over-inspection by recognizing dirt or the like as a mark. Further, since the unseen reference mark S can be confirmed by the presence or absence of the detection of the reference mark S at the planned detection location, the unseen reference mark S can be detected at an early stage.
As described above, in the present embodiment, by printing a plurality of reference marks S and reprinting with the plurality of reference marks S as a reference, the defect mark K can be reprinted more accurately.

(effect)
(1) The present embodiment is a method for treating a metal strip in which the same metal strip is sequentially treated by a plurality of treatment lines, and the first treatment line selected from the plurality of treatment lines is the metal strip. In the step of imparting the first position specifying mark to the metal band and the processing line upstream of the first processing line or the first processing line, the metal band is predetermined along the longitudinal direction. In the process of adding a plurality of reference marks arranged in a regular manner and in the second processing line which is a processing line downstream of the first processing line, the metal band to which the first position specifying mark is added. After the step of cutting the portion and the step of cutting in the second processing line, a second position specifying mark is placed at the same position as the first position specifying mark in the longitudinal direction with respect to the metal band. At least one of the plurality of reference marks is detected in the step of giving and before the second position specifying mark is given in the second processing line, and the above is based on the position information of the detected reference marks. A step of calibrating the tracking information for adding the second position specifying mark is provided.

The treatment of the metal strip 10 is, for example, a treatment for manufacturing the metal strip 10. Further, it is a process of the metal strip 10 for manufacturing a cold-rolled steel sheet.
According to this configuration, the reference marks S arranged in the longitudinal direction according to a certain rule calibrate the misalignment of the position tracking for imparting the second position specifying mark in the second processing line. As a result, in the present embodiment, it is possible to print at the same position in the longitudinal direction on different processing lines. That is, according to this configuration, the tracking deviation can be suppressed to a small size. Therefore, it is possible to automatically perform the printing process that was manually performed when reprinting at the same position.

(2) In the present embodiment, there is a method for treating a metal band in which the same metal band is sequentially treated by a plurality of treatment lines, and the first treatment line selected from the plurality of treatment lines is used for the metal band. In the step of imparting the first position specifying mark to the metal band and the processing line upstream of the first processing line or the first processing line, the metal band is predetermined along the longitudinal direction. In the process of adding a plurality of reference marks arranged in a regular manner and in the second processing line which is a processing line downstream of the first processing line, the metal band to which the first position specifying mark is added. After the step of cutting the portion and the step of cutting in the second processing line, a second position specifying mark is placed at the same position as the first position specifying mark in the longitudinal direction with respect to the metal band. The process of attaching is provided, and the longitudinal position of the first position specifying mark is associated with the reference mark selected from the plurality of reference marks, and the position information of the selected reference mark is provided in the second processing line. Based on the above, the position in the longitudinal direction of the first position specifying mark is specified, and the position of the second position specifying mark is determined.

According to this configuration, the position tracking deviation is compensated by the reference marks S arranged in the longitudinal direction according to a certain rule. As a result, it becomes possible to print at the same position in the longitudinal direction on different processing lines. That is, according to this configuration, the tracking deviation can be suppressed to a small size. Therefore, it is possible to automatically perform the printing process that was manually performed when reprinting at the same position.

(3) Here, in the present embodiment, in the second processing line, after the processing of cutting (trimming) the portion of the metal band 10 to which the first position specifying mark is given, it is removed by the cutting treatment. The second position specifying mark (mark for reprinting) is given to the portion of the end portion of the metal band 10 in the width direction that has not been formed.
In this case, the process of cutting off the portion of the metal band 10 to which the first position specifying mark is given is executed before the second position specifying mark is given.
According to this configuration, it is possible to add a second position specifying mark to the end portion of the metal band 10 with high position accuracy.
The method of reprinting before trimming has no advantage. This is because the printing on the first processing line and the reprinting have the same information, so that there is no need for reprinting.

(4) In the present embodiment, the plurality of reference marks S are given identification information for identifying each reference mark S.
According to this configuration, each reference mark S can be individually identified.

(5) In the present embodiment, the longitudinal position of the first position specifying mark is specified by the longitudinal distance of the metal band 10 from the selected reference mark S.
According to this configuration, the longitudinal position of the first position specifying mark can be associated with the selected reference mark S.

(6) In the present embodiment, in the second processing line, a process of cutting off a portion of the metal band 10 to which the plurality of reference marks S are attached is performed.
For example, the process of cutting off the portion of the metal band 10 to which the plurality of reference marks S are attached is executed before the second position specifying mark is attached.
According to this configuration, the reference mark S can be removed.

(7) In the present embodiment, the first position specifying mark and the second position specifying mark are defect marks K indicating the positions of the defects of the metal band 10 in the longitudinal direction.
According to this configuration, the defect mark K can be reprinted with high accuracy.

(8) The present embodiment is a mark-imparting method for imparting a mark to the metal strip when sequentially treating the same metal strip with a plurality of treatment lines, and is a method selected from the plurality of treatment lines. In the processing line 1, a first position specifying mark for specifying a position is attached to the metal band, and the metal band is marked on the first processing line or a processing line upstream of the first processing line. A second processing line, which is a processing line downstream of the first processing line, is provided with a plurality of reference marks arranged with a predetermined rule along the attached longitudinal direction, and is the first processing line. A second position identification mark is given at a position where the position identification mark and the position in the longitudinal direction are the same, and when the second position identification mark is given, based on the position of the reference mark selected from the plurality of reference marks. By specifying the position in the longitudinal direction of the first position specifying mark, the position to attach the second position specifying mark is determined.

(9) In the present embodiment, when the same metal band is sequentially treated by a plurality of treatment lines, the second treatment line selected from the plurality of treatment lines is upstream from the second treatment line. A mark giving device for giving a second position specifying mark at a position where the position in the longitudinal direction of the metal strip is the same as the first position specifying mark given in the first processing line of the above. A reference mark printing device that is arranged on the processing line or a processing line upstream of the first processing line and prints a reference mark on a metal band, and a predetermined rule along the longitudinal direction with respect to the metal band. A reference mark printing processing unit that executes a process of printing a plurality of reference marks lined up with a characteristic via the reference mark printing device, a reference mark selected from the plurality of reference marks, and the first position identification. A related information acquisition unit that obtains related information associated with a mark, a mark detection unit that is provided in the second processing line and detects a reference mark, and a mark detection unit that is arranged in the second processing line and is formed on a metal strip. From the reprinting device that gives the second position identification mark, the related information obtained by the related information acquisition unit, and the position information of the reference mark detected by the mark detection unit, the metal band of the first position identification mark. It is provided with a reprint processing unit that specifies a position in the longitudinal direction and executes a process of printing the second position specifying mark via the reprint device based on the specified longitudinal position.

According to this configuration, the position tracking deviation is compensated and calibrated by the reference marks S arranged in the longitudinal direction according to a certain rule. As a result, it becomes possible to print at the same position in the longitudinal direction on different processing lines. That is, according to this configuration, the tracking deviation can be suppressed to a small size. Therefore, it is possible to automatically perform the printing process that was manually performed when reprinting at the same position.

(10) It is preferable that the plurality of reference marks S are provided with identification information for identifying each reference mark S.
According to this configuration, each reference mark S can be easily identified.

(11) In the present embodiment, the related information is the longitudinal direction of the metal band 10 between the longitudinal position of the first position specifying mark and the longitudinal position of the reference mark S selected from the plurality of reference marks S. Contains information on the separation distance of.
According to this configuration, the longitudinal position of the first position specifying mark can be associated with the selected reference mark S.

Here, the entire contents of the Japanese patent application 2020-164011 (filed on September 29, 2020), for which the present application claims priority, form part of the present disclosure by reference. Although the description has been made here with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications of each embodiment based on the above disclosure are obvious to those skilled in the art.

1 Payoff reel 2 Tension reel 2, PLG
4 Plating processing unit 5 Defect inspection device 6 Printing device 6A Defect mark printing device 6B Reference mark printing device 7 First line control unit 7A First position tracking unit 7B Defect mark printing processing unit 7C Reference mark printing processing unit 8 Database 9 Upper computer 9A Related information acquisition unit 10 Metal strip 11 Print record data 12 Print record data group 20 Payoff reel 21 Tension reel 21, PLG
23 Print mark recognition device 24 Trim device 25 Reprint device 26 Second line control unit 26A Second position tracking unit 26B Reprint processing unit K Defect mark S Reference mark

Claims

It is a method of processing a metal band in which the same metal band is sequentially treated by a plurality of processing lines.
In the first processing line selected from the plurality of processing lines, a step of imparting a first position specifying mark to the metal band and a step of imparting a first position specifying mark.
A step of imparting a plurality of reference marks arranged in a predetermined rule along the longitudinal direction to the metal band in the first processing line or a processing line upstream of the first processing line. When,
In the second processing line, which is a processing line downstream of the first processing line, the step of cutting off the metal band portion to which the first position specifying mark is given, and
In the second processing line, after the cutting step, a second position specifying mark is given to the metal band at the same position as the first position specifying mark in the longitudinal direction.
In the second processing line, at least one of the plurality of reference marks is detected before the second position identification mark is added, and the second position is specified based on the position information of the detected reference marks. The process of proofreading the tracking information for adding the mark, and
A method for treating a metal band, which comprises.
It is a method of processing a metal band in which the same metal band is sequentially treated by a plurality of processing lines.
In the first processing line selected from the plurality of processing lines, a step of imparting a first position specifying mark to the metal band and a step of imparting a first position specifying mark.
A step of imparting a plurality of reference marks arranged in a predetermined rule along the longitudinal direction to the metal band in the first processing line or a processing line upstream of the first processing line. When,
In the second processing line, which is a processing line downstream of the first processing line, the step of cutting off the metal band portion to which the first position specifying mark is given, and
In the second processing line, after the cutting step, a second position specifying mark is attached to the metal band at the same position as the first position specifying mark in the longitudinal direction.
Equipped with
The longitudinal position of the first position specifying mark is associated with the reference mark selected from the plurality of reference marks.
In the second processing line, the position in the longitudinal direction of the first position specifying mark is specified based on the position information of the selected reference mark, and the position of the second position specifying mark is determined.
A method for treating metal strips, which is characterized by the fact that.
The method for processing a metal band according to claim 1 or 2, wherein identification information for identifying each reference mark is given to the plurality of reference marks.
The treatment of the metal band according to claim 2 or 3, wherein the position in the longitudinal direction of the first position specifying mark is specified by the separation distance in the longitudinal direction of the metal band from the selected reference mark. Method.
The processing of the metal band according to any one of claims 1 to 4, wherein the process of cutting off the metal band portion to which the plurality of reference marks are attached is performed in the second processing line. Method.
The metal band processing method according to claim 5, wherein the process of cutting off the metal band portion to which the plurality of reference marks are attached is executed before the second position specifying mark is applied.
The first position identification mark and the second position identification mark are the defect marks indicating the longitudinal positions of the defects of the metal band according to any one of claims 1 to 6. The described method for treating a metal band.
A method for manufacturing a metal band, comprising the method for treating the metal band according to any one of claims 1 to 7.
The method for manufacturing a metal strip according to claim 8, wherein the cold-rolled steel sheet is manufactured.
It is a mark giving method for giving a mark to the metal strip when sequentially treating the same metal strip with a plurality of treatment lines.
In the first processing line selected from the plurality of processing lines, the first position specifying mark for specifying the position with respect to the metal band is attached.
A plurality of reference marks arranged with a predetermined rule along the longitudinal direction attached to the metal strip on the first processing line or the processing line upstream of the first processing line are given.
In the second processing line, which is a processing line downstream of the first processing line, a second position specifying mark is given at a position where the position in the longitudinal direction is the same as that of the first position specifying mark.
When the second position specifying mark is given, the second position is specified by specifying the longitudinal position of the first position specifying mark based on the position of the reference mark selected from the plurality of reference marks. Determine the position to put a specific mark,
A marking method characterized by that.
In the second processing line selected from the plurality of processing lines when sequentially processing the same metal band by a plurality of processing lines, the first processing line upstream of the second processing line gives the same metal band. It is a mark giving device for giving a second position identification mark at the same position as the first position identification mark made and the position in the longitudinal direction of the metal band.
A reference mark printing device that is arranged on the first processing line or a processing line upstream of the first processing line and prints a reference mark on a metal band.
A reference mark printing processing unit that executes a process of printing a plurality of reference marks arranged with a predetermined rule along the longitudinal direction on the metal band via the reference mark printing device.
A related information acquisition unit that obtains related information that associates the reference mark selected from the plurality of reference marks with the first position specifying mark, and the related information acquisition unit.
A mark detection unit provided on the second processing line to detect the reference mark, and
A reprinting device arranged on the second processing line to give a second position identification mark to the metal strip, and a reprinting device.
From the related information obtained by the related information acquisition unit and the position information of the reference mark detected by the mark detection unit, the position in the longitudinal direction of the metal band of the first position identification mark is specified, and the position in the specified longitudinal direction is set. Based on this, a reprint processing unit that executes a process of printing the second position specifying mark via the reprint device, and
A mark printing device characterized by being provided with.
The mark printing device according to claim 11, wherein the plurality of reference marks are provided with identification information for identifying each reference mark.
The related information is characterized by including information on the separation distance in the longitudinal direction of the metal band between the longitudinal position of the first position specifying mark and the longitudinal position of the reference mark selected from the plurality of reference marks. The mark printing device according to claim 11 or 12.
The first position identification mark and the second position identification mark are any one of claims 11 to 13, characterized in that they are defect marks indicating the longitudinal positions of defects of the metal band. The described mark printing device.