JP4325218B2 - Defect mark marking method and metal band marking defect mark - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for marking a defect mark on a defect position of a long metal strip represented by a steel strip and facilitating confirmation of the longitudinal position of the defect in a subsequent process.
In the following, a steel strip that is a typical example of a metal strip will be described.
[0002]
[Prior art]
In equipment that continuously processes coiled steel strip, such as continuous pickling equipment, continuous annealing equipment, continuous plating equipment, etc., a defect mark is marked on the defective part of the steel strip, and the defect mark is marked in the downstream process equipment. Detecting and performing necessary processing such as care and defect removal.
[0003]
Conventionally, as a method of marking a defect mark for clearly indicating this defective portion, a line having a predetermined width and a predetermined length is used by using a marking device such as an inkjet marker or a felt pen or a marking tool on the surface of the steel strip having the defective portion. Marking is performed by attaching a defect mark in the form of a mark. Further, the longitudinal position information of the defect is input and recorded in a storage device or recorded by handwriting or the like in a storage device in order to facilitate defect mark confirmation in a subsequent process. For this reason, the line is provided with a length measuring device such as a length measuring roll (measuring roll) so that the position information in the longitudinal direction of the defect becomes clear.
[0004]
Based on FIG. 4, the example of the installation which performs the marking applied conventionally is demonstrated. FIG. 4 conceptually illustrates the equipment for marking, and is different from the actual equipment.
A defect detection sensor 4 is arranged on the continuous line of the steel strip 1, and when the defect 10 is detected and determined as a defect by the inspection device 5, dot-like ink is ejected from the defect mark nozzle 8, and the surface of the steel strip 1 is discharged. A linear defect mark 2 is attached on top. The defect mark 2 is usually attached to either side of the end portion in the longitudinal direction of the steel strip 1 so that confirmation in a subsequent process is easy. However, the defect mark nozzle 8 may be attached in the vicinity of the defect 10 by, for example, automatically traversing. The position where the defect mark 2 is marked (position in the longitudinal direction of the steel strip 1) is recorded in the process computer 7 that manages the line based on the input from the length measuring roll 6.
[0005]
In FIG. 4, the automated line has been described. However, the operator who monitors the line visually checks the defect, marks it with a felt pen, etc., and records the longitudinal position information of the defect on the form by looking at the length measurement display. It is also done.
By the way, in the length measurement using this length measurement roll, the length measurement is usually started with the tip of the steel strip as a base point, and the length measurement values are accumulated. Further, in a continuous line that is processed by joining the front and rear end portions of the steel strip, a punched hole is made in the vicinity of the joined portion as a mark, and the length measurement value is accumulated using the punched hole as a base point. The length measurement by the length measuring roll is generally a method of calculating the distance by detecting the rotational speed (rotation angle) of the roll brought into contact with the steel strip surface.
[0006]
However, the steel strip is very long, and there are coils with a length exceeding 10 km. If there is a measurement error due to wear or slip of the measurement roll, the error is accumulated and becomes a very large error.
Therefore, even if trying to check the defect mark based on the longitudinal position information of the defect in the subsequent process, the defect mark cannot be found at the corresponding position, and the defect mark can only be found after confirming a wide range. There is.
[0007]
In Patent Document 1, because of the large accumulated error as described above, a mark that can recognize the position in the longitudinal direction of the coil (that is, a reference mark) is used to solve the problem that the automatic deceleration process at the tail end of the steel strip is displaced. A longitudinal position marking steel strip coil is disclosed. Then, it is assumed that accurate automatic deceleration processing at the tail end of the steel strip can be realized by measuring the length with a length measuring roll using the reference mark as a base point. In addition, by recording defective parts such as wrinkles on the inspection line at a length position with the reference mark as the base point, the accuracy of the longitudinal position can be made extremely accurate, which helps save labor for inspection personnel in the next process. It is said.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-24528
[Problems to be solved by the invention]
As described above, the present invention improves the conventional marking method with low accuracy in the longitudinal direction of the defect, and performs high-accuracy confirmation of the corresponding defect mark based on the longitudinal position information of the defect mark recorded in the storage means. It is possible to do that. Then, in order to find a defect mark, the line speed is started to be decelerated early, so that the problem that the sheet passing time becomes long and the productivity of the line is hindered is solved.
[0010]
That is, the present invention provides a defect mark marking method and a defect marking metal strip that do not require unnecessary deceleration of the line speed performed for defect mark confirmation and do not hinder the productivity of the line.
[0011]
[Means for Solving the Problems]
The present invention is a defect marking method and a defect marking metal strip described in the following items.
(1) While measuring the length of the metal strip in the longitudinal direction, detecting the defect and marking the defect mark at the longitudinal position of the defect, recording the longitudinal position information of the defect in the storage means, In the process, a defect marking method for confirming a corresponding defect mark based on the longitudinal position information of the defect mark recorded in the storage means, wherein the longitudinal position is determined in advance in conjunction with the marking of the defect mark In marking one or more fiducial marks on the metal strip, when the planned position for marking the fiducial mark is within a predetermined length from the already marked defect mark, the defect mark is substituted for the fiducial mark. A feature defect marking method.
(2) The defect marking method according to (1), wherein the reference mark is marked at a predetermined pitch.
( 3 ) The defect marking method according to (1) or (2) above, wherein the marking colors of the defect mark and the reference mark are different.
( 4 ) The defect marking method according to any one of the above (1) to ( 3 ), wherein the marking mark marking ink is an extinct ink.
( 5 ) A defect mark is marked at a position in the longitudinal direction of the defect, and one or more reference marks having a predetermined longitudinal position are marked, and a planned position for marking the reference mark has already been marked. A defect marking metal strip , wherein the defect mark is substituted for a reference mark when it is within a predetermined length from the defect mark .
( 6 ) The defective marking metal strip according to ( 5 ), wherein the reference mark is marked at a predetermined pitch.
( 7 ) The defect marking metal strip according to (5) or (6) , wherein the marking color of the defect mark and the reference mark are different.
( 8 ) The defective marking metal strip according to any one of the above (5) to (7) , wherein the marking mark marking ink is an extensible ink.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described based on the conceptual facility example shown in FIG. In addition, the same number is attached | subjected to the member same as the example of the conventional equipment already demonstrated in FIG. 4, and description here is abbreviate | omitted.
In a preferred embodiment of the present invention, a reference mark nozzle 9 is newly provided in addition to the conventionally provided defect mark nozzle 8, and a reference mark whose longitudinal position is determined in advance in parallel with the defect mark 2 is provided. 3 is marked. The reference mark 3 is marked based on an instruction output from the process computer 7 managing the line based on the input from the length measuring roll 6. The process computer 7 records the marked reference marks 3 and the marking positions of the defect marks 2 in correspondence with each other. By doing so, an operator who confirms the defect in a later process can easily confirm the defect by confirming the defect mark 2 while referring to the reference mark 3.
[0013]
The reference mark 3 is preferably marked at a predetermined pitch so that the operator can easily refer to it. In addition, it is preferable that the markings of the defect mark 2 and the reference mark 3 are different so that the operator can easily distinguish them. Since the reference mark 3 becomes unnecessary after the operator confirms the defect mark 2, it is preferable that the reference mark 3 is made of an erasable ink that can be easily erased. As the extensible ink, for example, water-soluble ink that can be washed away with water is suitable.
[0014]
Incidentally, in the present invention, predetermined position for marking a reference mark, when already there from marked defect marks within a predetermined length, you substitute the defect marked instead of the reference mark. In that case, if the operator does not mark the reference mark at a position where there should be a reference mark to be marked every predetermined pitch in order to reduce the number of markings, etc., the operator can easily place a defect mark at a position within a predetermined length from that position. Can be found.
[0015]
In the above description, the example in which the reference mark nozzle 9 is newly provided in addition to the conventionally provided defect mark nozzle 8 has been described. However, the present invention is not limited to this example. The defect mark 2 and the reference mark 3 may be marked only by the nozzle 8 for use. Further, the defect mark 2 and the reference mark 3 may be marked as parallel lines adjacent to the vicinity, or may be marked on the same line. The important point is that both the defect mark 2 and the reference mark 3 are marked for easy viewing by the operator.
[0016]
Figure 2 is a defect mark 21 to 27 which is marked in response to the defect 10 on the metal strip 1 (indicated by black dots.) Is a schematic diagram showing an example of the reference mark 31 to 34 marked with a predetermined pitch, the reference An example of the metal band which marked the defect mark of invention is shown.
On the other hand, FIG. 3 shows that in the present invention, the reference marks were not marked at the reference mark planned positions 31a and 32a scheduled to be marked within the predetermined length (indicated here by Xm) from the defect marks 22a and 24a. An example is shown. In this case, the defect marks 22a and 24a become defect marks also serving as reference marks. The reference mark 33 is marked as usual because it is located at a position exceeding a predetermined length (Xm) from the defect mark 25.
[0017]
【The invention's effect】
The defect marking method and defect marking metal strip of the present invention makes it possible to eliminate the need to reduce the line speed, which has been performed for defect mark confirmation, in the downstream process of the line, thus eliminating the line productivity hindrance factor. I was able to.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing an example of equipment suitable for application of a defect marking method of the present invention.
FIG. 2 is a schematic diagram showing an example of a defect marking metal strip according to a reference invention.
FIG. 3 is a schematic view showing another example of the defect marking metal strip of the present invention.
FIG. 4 is a schematic diagram showing an example of equipment for performing conventional defect marking.
[Explanation of symbols]
1 Steel strip (metal strip)
2, 21-27 Defect mark
22a, 24a Defect mark 3, 31-34 fiducial mark
31a, 32a Reference mark planned position 4 Defect detection sensor 5 Inspection device 6 Measuring roll (Measuring roll)
7 Process computer 8 Defect mark nozzle 9 Reference mark nozzle
10 defects

Claims (8)

While detecting the defect while measuring the length of the metal strip in the longitudinal direction and marking the defect mark at the position in the longitudinal direction of the defect, the longitudinal position information of the defect is recorded in the storage means, A defect marking method for confirming the corresponding defect mark based on the longitudinal position information of the defect mark recorded in the storage means,
In addition to marking the defect mark, when marking one or more reference marks having predetermined longitudinal positions on the metal band, the planned position for marking the reference mark is a predetermined length from the already marked defect mark. A defect marking method characterized by substituting the defect mark for a reference mark when it is within .   The defect marking method according to claim 1, wherein the reference mark is marked at a predetermined pitch. Defect marking method according to claim 1 or 2, characterized in that the marking color of the defect mark and the reference mark of the different. Defect marking method according to any one of claims 1 to 3, characterized in that the marking ink of the reference mark and the variable-extinguishing ink. A defect mark is marked at a position in the longitudinal direction of the defect, and one or more reference marks having a predetermined longitudinal position are marked, and the planned position for marking the reference mark is determined from the already marked defect mark. A defect marking metal strip , wherein the defect mark is substituted for a reference mark when it is within a predetermined length . The defect marking metal strip according to claim 5 , wherein the reference mark is marked at a predetermined pitch. The defect marking metal strip according to claim 5 or 6 , wherein the defect mark and the reference mark have different marking colors. The defect marking metal strip according to any one of claims 5 to 7 , wherein the marking mark marking ink is an extinct ink.

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