JP2001252718A - Marking apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a marking apparatus having high reliability so as not to overlook a minute flaw in a material to be inspected as well as not to overlook a flaw in the inspection for the product to be inspected after primary working. SOLUTION: The apparatus is provided with a flaw detection apparatus 20 to detect a position/length of a flaw in a running steel material 1, a marking position/range control apparatus 22, in which a lower limit value/upper limit value of a marking length and a lower limit value of a marking interval are set beforehand, a start position/range of the making is instructed by the flaw information from the flaw detection apparatus 20, a tracking apparatus 24 to output a marking command in a time zone conducting the marking by tracking a start position/range of the marking by the instruction from apparatus 22 and a marking apparatus 26 to impart a mark on a steel plate 1 by the marking command from the apparatus 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking device for displaying marks, patterns, prints, and the like on flaws and unique parts on a continuous production line, an inspection line, or the like.

[0002]

2. Description of the Related Art As a method of displaying marks, patterns, printing, and the like on flaws and unique parts on a continuous production line or an inspection line, known devices such as an ink jet system and ink dot marks are commercially available. However, when a mark is formed with these, it is difficult to mark the mark directly above the flaw so as to cover the flaw. For example, in the case of a band-shaped material to be marked, when there are a plurality of flaws in the width direction,
It cannot be said that it is impossible to make a mark so as to cover a flaw with respect to dirt or the like spread not in a dot but in a plane.

[0003] Normally, in a device such as an ink jet system or ink dot marking which is commercially available as a device for displaying a mark, a pattern, a print, or the like on these flaws or peculiar portions, for example, an edge of a line center or a band-shaped material to be marked is used. The marking is fixed at a predetermined position in the line so as to mark the vicinity or the like.

For example, according to Japanese Patent Publication No. 7-36003, a mark sensor for checking whether or not a marking device has reliably marked a flaw detected by a flaw sensor is provided downstream of the marking device. When marking is performed by tracking the part, the mark sensor is operated only while the flaw is moved to a position of D ± α with respect to the distance D between the flaw sensor and the mark sensor. (The above α is 300 mm in the embodiment). In this method, even when a long flaw is present, marking is performed only on the tip of the long flaw, and marking is determined.

[0005]

In a continuous production line, an inspection line, etc., marks, patterns, etc.
In a conventional method of displaying a print or the like, marking is fixed at a predetermined position in a production or inspection line so as to mark, for example, near a line center or an edge of a band-shaped material to be marked. As a result, when shipping a band-shaped material to be marked, there is a problem that it is unclear where in the width direction there is a flaw. However, when the length of one sheet is short depending on the use, even if it is unclear where the flaw is, there is no problem if all the marked portions are cut off.
These are when the used amount or cut length of one sheet is short, but when the used amount or cut length of one sheet is long, very large waste occurs.

For example, in the case of a steel plate for an outer panel for an automobile,
The usage amount or cut length of one sheet is long. In this case, when the sheet is divided, punched out, and cut at the peripheral portion, etc., in a length suitable for the purpose of use when the very small flaws are between the flaws or the continuous flaws are appropriately separated. In addition, the marked portion may be cut off, and the position of the flaw may be unknown. Therefore, in the case of a band-shaped material to be marked, it is necessary that a defective portion remains clearly even after the primary processing. In other words, even when the primary processing is performed using the defective part, the inspector needs to be able to easily recognize these and remove the same.

According to Japanese Patent Publication No. 7-36003, the tip of a mark added to a flaw is divided, punched,
When the peripheral portion and the like are cut, it becomes apparent that the flaw portion is clearly processed even if it is subjected to primary processing. As a result, if a serious flaw is overlooked, it is expected that a press machine trouble will occur in a post-process such as secondary processing.

[0008]

According to a first aspect of the present invention, there is provided a marking apparatus for detecting a flaw of a material to be inspected while traveling, and sequentially outputting information on the position and length of the flaw in the traveling direction each time. Flaw detection means, and sequentially input flaw information output by the flaw detection means to calculate the center position of the length of each flaw and the interval between the next flaw, for these input and calculated flaw information, Marking position / range control means for designating a marking start position and a range of a material to be inspected with reference to a preset shortest range and longest range of a single marking and a minimum interval between markings, and the marking position / range control The marking start position and range of the material to be inspected are tracked according to the instruction of the means, and a marking command is issued at the time when the position and range reach the arrangement position of the marking means on the downstream side in the traveling direction. And tracking means for, in which the tracking means and a marking means for applying a mark to be inspected material in a time zone during which output the marking command.

In the marking device according to a second aspect of the present invention, in the marking device according to the first aspect, the marking position / range control means sets the marking as an instruction for the sequentially input flaw information. For each flaw information, a marking range that is equal to or longer than the length of the flaw is determined between the set shortest range and the longest range, and the center position of the marking range substantially coincides with the center position of the length of the flaw. In this way, the start position and range of each separate marking are determined as described above, and when there are a plurality of pieces of flaw information that are successively input, the interval between the markings for the plurality of pieces of flaw information is equal to or more than the set minimum gap If it is the said individual marking, otherwise, as the combined marking as the starting position of the individual or combined marking and It is an indication of the circumference.

According to a third aspect of the present invention, in the marking apparatus according to the first or second aspect, the marking position / range control means inspects each of the sequentially input flaw information. When indicating the marking start position and range of the material, if the range to be marked exceeds the longest range of the set single marking, one or both of the alarm signal and the marking hold control signal It has signal output means for outputting a signal.

According to a fourth aspect of the present invention, in the marking apparatus according to the first or second aspect, the marking position / range control means is configured to determine the number and length of markings in advance for each product unit of the material to be inspected. The allowable number and the allowable length for the integrated number and the integrated length are respectively set, and the integrated number or the integrated length of the marking indicated by the marking position / range control means is the set allowable number or the allowable length. If the number exceeds the limit, a signal output means for outputting one or both of a warning signal and a marking suspension control signal is provided.

A marking device according to a fifth aspect of the present invention is the marking device according to any one of the first to fourth aspects, wherein the marking device is disposed downstream of the marking means in the running direction of the material to be inspected. Mark detecting means for detecting a mark given to the material to be inspected by the marking means, and the corresponding position and range of the material to be inspected to which the tracking means has output a marking command have reached the arrangement position of the mark detecting means. Monitoring means for monitoring whether or not the mark detection means has detected a mark during a time period.

According to a sixth aspect of the present invention, in the marking apparatus according to the fifth aspect, a camera for photographing a mark is used as the mark detecting means.
The apparatus further includes a judgment unit for judging the quality of the mark by using the image data taken by the camera at a corresponding position and range of the inspection material to which the tracking unit has output the marking command.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a marking device according to an embodiment of the present invention. In FIG. 1, 1
Is a steel plate, 20 is a flaw inspection device, 21 is a manual input switch,
22 is a marking position / range control device, and 23 is a higher-order CP.
U or manual setting device, 24 is a tracking device, 25
Is a marking receiving roll, 26 is a marking device, 27 is a camera, and 28 is a lighting device. 29 is the running steel 1
Is a position detector for detecting the running position of the motor, for example, by counting the output of a pulse generator coupled to a rotating roll. Reference numeral 30 denotes a determination device, and 31 denotes a monitor.

FIGS. 2 and 3 are views showing Embodiments 1 and 2 of the marking pattern of the present invention.
Will be described. As shown in FIG. 2A, the flaw detection device 20 of FIG. 1 detects a flaw or a peculiar portion in the width direction of the steel sheet 1 which is wound and traveled by the winding device, and each time the detection is performed, Location and length (L _d )
Position / range control device 2 by sequentially outputting the information of
Supply to 2. In the example of FIG. 2A, the flaw detection device 20
Is obtained by counting the position signal from the position detector 29 at the time of flaw detection (for example, the distance from the winding start position (0.0 m, m is meter), and the pulse signal generated for each unit distance traveled). position signal) reads indicated by the count value to be, AAA is first flaw generation position of FIG., Am position, its length is detected as L _d1, also the following defects occur position B
The positions and lengths of BB and Bm are detected as L _d2 .

The marking position / range control device 22 includes:
Normally, flaw information on the position and length of each flaw from the flaw detection device 20 is input. However, when the marking is manually designated, a marking designation signal from the manual input switch 21 is input. The marking position / range control device 22 includes a steel material 1 before the marking process.
The following various marking reference information adapted to the use purpose (for example, a steel plate for an outer panel or an electric appliance for an automobile) is set in advance by the upper CPU or the manual setting device 23.

[Marking Reference Information] (1) The shortest range of a single marking (L _min , for example, 0.
5m) This indicates the lower limit of the marking range (length, L _M ), no matter how small the flaw length (L _d ) is.
This means that the marking length will not be shorter than the shortest range. When the flaw is very small, the flaw length L
_d is a margin d (d is a preset or fixed value)
Is smaller than the shortest range, the marking range is set to the shortest range. (2) the longest range of a single marking (L _max , eg 5
m) This indicates the upper limit of a single marking range by individual marking or linked marking (described later). Even if the length of the flaw is long or the flaw is continuously generated, it is a good product. Means that the marking length is not longer than the longest range. However, depending on the occurrence of flaws, the range to be marked may exceed this upper limit. In this case, another processing such as stopping the marking processing and generating an alarm (defective product) Processing).

(3) Minimum spacing between markings (G
_min , for example, 0.25 m) This is the case where individual marking ranges are set for two flaws detected before and after the traveling of the steel sheet.
When the interval between the two flaws is small, a part of the set individual marking area may overlap or the interval between the markings may be smaller than the minimum interval. In this case, the two markings are connected. Into a single marking. In other words, it has the meaning of a reference value for determining whether marking for two consecutive flaws is an individual marking or a linked marking. In addition, as shown in FIG. 3B, when a plurality of flaws are present in a row and the intervals between the individual markings are all less than the minimum interval, all the individual markings are connected to form a single Marking.

(4) The total allowable number of markings for each product unit (for example, 5) For example, for each steel coil (length from the start of winding to the end of winding), the integrated value of the number of markings on the flaw is If the number is equal to or less than the allowable number of integrated products, it is a reference value for determining a good product, and if the number is equal to or greater than the allowable number, it is a determination reference value. (5) Accumulated allowable length of marking for each product unit (for example, 20 m) For example, if the integrated value of the range (length) where the flaw is marked for each coil of steel is less than this allowable length, it is a good product if it is longer than this allowable length. Is a determination reference value for determining that

When the marking position / range control device 22 sequentially receives information on the position and length of the flaw in the running direction of the steel sheet 1 from the flaw detecting device 20, the center position of the length of each flaw and the next Calculate the interval with the flaw. Here, it is necessary to determine the center position of the length of each flaw in order to determine the starting position and the range of the marking so that the center position of the marking range almost coincides with the center position of the flaw when performing marking. This is because (see FIG. 2B). In the present invention, as shown in FIGS. 2 and 3, the range (length) of the marking is always larger than the length of the flaw, and does not become smaller than the length of the flaw. Also determine the distance between the next flaw is because required when calculating the distance between the marking mutual (G _M), in the FIG. 2 (a), the distance between the next flaw (G _d ) Is the position detection value B
BB, from _{Bm (AAA, A m + L} d1) obtained by subtracting.

The marking position / range control device 22 responds to the information on the occurrence position and length of each flaw, the center position of the calculated flaw length, and the information on the interval between the next flaw, as described above. The following (1) and (2) processes are performed to instruct marking. (1) First, for each flaw information, a marking range that is longer than the length of the flaw is determined from the set shortest range to the longest range, and the center position of this marking range is the center position of the length of the flaw. The starting position and range of each individual marking are determined so as to substantially coincide with. (2) When there are a plurality of pieces of flaw information that are successively input, if the interval between the markings for the plurality of pieces of flaw information is greater than or equal to the set minimum interval, the individual marking is performed. If not, the start position and range of the individual or linked markings are instructed to the tracking device 24 as linked markings (see (b) and (c) of FIG. 2).

The tracking device 24 includes a position detector 29
The start position and range of the marking of the steel sheet 1 are instructed by the marking position / range control device 24 by using the position detection signal input from the controller, and the position and the range of the marking device 26 are located on the downstream side in the traveling direction. Marking device 2 sends a marking command at the time of reaching the position
6 is output. The marking device 26 performs marking on the steel plate 1 during a time period when the tracking device 24 outputs the marking command. Further, the tracking device 24
Lighting device 28 and camera 2 according to a marking command from
7. Lighting and photographing are performed in conjunction with 7. The image captured by the camera 27 is displayed on the monitor 31 to confirm that the marking is actually performed, or is used by the determination device 30 to determine the quality of the marking.

The marking position / range control device 2
2 designates a marking start position and a range of a material to be inspected for each of the sequentially input flaw information,
When the range in which the marking is to be instructed exceeds the set maximum range of the single marking ( _Lmax ), one or both of the alarm signal and the marking hold control signal are output. The driver can arbitrarily select the handling of the corresponding product, such as cutting the relevant range of the inspection target material, creating an abnormal form, or canceling the marking, using the alarm signal or the control signal.

Further, the marking position / range control device 22 has an integrated number and an allowable number for the integrated length and the integrated number obtained by integrating the number and length of the markings for each product unit of the steel sheet 1 (for example, for each coil) in advance. The length is set, and the marking position / range control device 22
When the designated number of markings or the total length exceeds the set allowable number or length, one or both of an alarm signal and a marking hold control signal are output. As a result, discrimination between a non-defective product and a defective product is performed for each product unit, and the driver can quickly perform a process based on a result of the discrimination.

A supplementary description of the embodiment of the marking pattern in FIGS. (A) of FIG. 2 shows the distance G _d of length L _d1, L _d2 and two flaws of the two flaws longitudinal by running, in FIG (b), the center position of the marking range L _M performed and the possible to match the center position of the length L _d of the flaw, since an interval G _M between marking each other set minimum distance G _min or more, each individual marking to two flaws consecutive It is shown that. FIG. 2
Of (c) it is because it is below the minimum range G _min interval G _M between marking each other is set, indicating that perform linking marking connecting the two individual markings range shown by the broken line.

FIG. 3A shows a case where the length of the flaw is very short, and a case where the next flaw does not exist near the flaw. In this case, as shown in FIG. The marking is performed such that the center position of the flaw portion and the center position of the marking coincide with the length of the shortest range L _min of the single marking.
FIG. 3B shows a case in which small flaws continue after a long flaw. If individual flaws are provided for each flaw, a part of the individual markings overlap or the interval between the markings is set. since the less the minimum spacing G _min which is, when it becomes all the individual markings linked marking is coupled as shown in FIG., the range of the connecting marking (length) is the longest range L _max or less that is set Is shown.

FIG. 4 is a view showing one embodiment of a case where a marked plate of the present invention is punched. A product marked on an original plate including a flaw is cut by a user after shipment, and is punched according to the use. FIG. 4 (a)
Shows a product marked on a flaw portion of an original sheet according to the present invention. Marking is performed on a large area compared to the size of the flaw. FIG. 4 (b) shows a case where the original sheet steel of FIG. 4 (a) is punched according to the purpose. Even after the punching, it is clearly shown that the primary processed product contains a flaw portion. I have. In some cases, flaws may also be punched out, but according to the marking method of the present invention, a range in which flaws remain remains, and re-inspection of this range is
Easy. And if the flaws are punched out,
The rest can be sufficiently used as a product, and the yield is improved. Compared to this, when marking was performed at the equivalent of the flaw length as before, if the marking part was punched out, the defective primary processed product was shipped as a good product, or the press machine was broken in a later process Etc. may cause serious troubles.

[0028]

As described above, according to the present invention, a flaw detecting means for detecting flaws in a material to be inspected during traveling and sequentially outputting information on the position and length of the flaws in the traveling direction each time,
The flaw information output by the flaw detection means is sequentially input to calculate the center position of the length of each flaw and the interval between the next flaw, and a predetermined single Marking position / range control means for designating the marking start position and range of the material to be inspected with reference to the shortest range and longest range of the marking and the minimum interval between the markings, and the inspection by the instruction of the marking position / range control means A tracking unit that tracks a marking start position and a range of the material and outputs a marking command during a time period when the position and the range reach the arrangement position of the marking unit on the downstream side in the traveling direction; and the tracking unit outputs the marking command. And marking means for applying a mark to the material to be inspected during the time period during which the Without overlooked that the fine flaws to set the lower limit of the marking length that, also can be clearly even flaws part included in the primary processed products.

Further, according to the present invention, the marking position / range control means sets, for each of the pieces of flaw information, the set shortest range to the longest range as markings instructing the sequentially input flaw information. Determine a marking range that is equal to or longer than the length of the flaw, and determine a start position and a range of a separate marking so that the center position of the marking range substantially matches the center position of the length of the flaw,
Next, when there are a plurality of pieces of flaw information that are successively input, if the interval between the markings for the plurality of pieces of flaw information is equal to or greater than the set minimum interval, the individual markings are used. Indicate the start position and range of individual or linked markings as linked markings, so the lower limit of marking length, upper limit and lower limit of marking interval should be set according to the intended use of the material to be inspected. By setting, even when the marked material to be inspected is cut and punched, not only re-inspection after punching becomes easy, but also serious troubles in the post-process can be avoided and the yield is improved. . Also,
If there is an abnormality, it is possible to know which position of the original steel sheet has an abnormality, and it is very easy to follow up, which can contribute to the improvement of the inspection system and the accuracy of the inspection apparatus.

According to the present invention, the marking position / range control means indicates a marking when indicating the marking start position and the range of the material to be inspected for each of the sequentially input flaw information. When the power range exceeds the longest range of the set single marking, the driver has signal output means for outputting one or both of an alarm signal and a marking hold control signal. By using these output signals, the corresponding range of the material to be inspected can be cut or appropriate processing can be performed.

Further, according to the present invention, the marking position / range control means includes an allowable number and an allowable length corresponding to an integrated number and an integrated length obtained by previously integrating the number and length of the marking for each product unit of the material to be inspected. Is set, and if the integrated number or the integrated length of the markings specified by the marking position / range control means exceeds the set allowable number or the allowable length, one of the warning signal and the marking hold control signal is output. Since it has a signal output means for outputting one or both signals, a non-defective product
Defective products are determined, and the driver can quickly perform processing based on the results of the determination.

According to the invention, there is provided a mark detecting means which is arranged downstream of the marking means in a running direction of the material to be inspected and detects a mark given to the material to be inspected by the marking means; Monitor means for monitoring whether or not the mark detection means has detected a mark during a time period when the position and range of the material to be inspected to which the means has output the marking command have reached the arrangement position of the mark detection means. Therefore, whether the marking by the marking means is actually performed on the material to be inspected is confirmed by the mark detecting means and the monitor means, and the reliability of the material to be inspected which has been detected can be improved.

Further, according to the present invention, a camera for photographing a mark is used as the mark detecting means, and image data photographed by the camera at a corresponding position and range of the inspection material to which the tracking means has output a marking command is used. Means for determining the quality of the mark is additionally provided, so that a defective mark such as unclear marking can be detected, and the reliability of the marking can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a marking device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a first embodiment of a marking pattern according to the present invention.

FIG. 3 is a diagram showing a second embodiment of a marking pattern according to the present invention.

FIG. 4 is a view showing one embodiment of a case where a marked plate of the present invention is punched.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel plate 20 Defect inspection device 21 Manual input switch 22 Marking position / range control device 23 Upper CPU or manual setting device 24 Tracking device 25 Marking receiving roll 26 Marking device 27 Camera 28 Illumination device 29 Position detector 30 Judgment device 31 Monitor

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akira Kazama 1-2-1 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 2G051 AA37 AB02 CA04 DA06 DA15 EB01 5B057 AA01 BA11 BA24 CC03 DA03 DA08 DA16

Claims (6)

[Claims] 1. A flaw detecting means for detecting flaws of a material to be inspected during running and sequentially outputting information on the position and length of flaws in the running direction each time, and flaw information output by the flaw detecting means. Input sequentially and calculate the center position of the length of each flaw and the interval between the next flaw, and for these input and calculated flaw information,
Marking position / range control means for designating a marking start position and a range of a material to be inspected with reference to a preset shortest range and longest range of a single marking and a minimum interval between markings, and the marking position / range control A tracking means for tracking a marking start position and a range of the material to be inspected according to an instruction of the means, and outputting a marking command in a time zone when the position and the range reach the arrangement position of the marking means on the downstream side in the traveling direction; A marking means for applying a mark to the material to be inspected during a time period during which the means outputs a marking command. 2. The marking position / range control means,
As the marking to be instructed for the sequentially input flaw information, first, for each flaw information, a marking range equal to or longer than the length of the flaw is determined from the set shortest range to the longest range. The start position and range of the separate markings are determined so that the center position of the mark substantially coincides with the center position of the length of the flaw. When the interval between the markings for the flaw information is equal to or more than the set minimum interval, the individual marking is set as the individual marking. Otherwise, the starting position and range of the individual or linked marking are indicated as the linked marking. The marking device according to claim 1, wherein: 3. The marking position / range control means,
When indicating the marking start position and range of the material to be inspected for each of the sequentially input flaw information, when the range to be marked exceeds the longest range of the set single marking, 3. The marking device according to claim 1, further comprising a signal output unit that outputs one or both of an alarm signal and a marking hold control signal. 4. The marking position / range control means,
The number of markings and the length of the marking are integrated in advance for each product unit of the material to be inspected, and the allowable number and allowable length for the integrated number and the total length are set, and the integrated number of markings specified by the marking position / range control means or When the integrated length exceeds the set allowable number or the allowable length, there is provided signal output means for outputting one or both of an alarm signal and a marking suspension control signal. Item 3. The marking device according to Item 1 or 2. 5. A mark detecting means which is arranged downstream of the marking means in the running direction of the material to be inspected and detects a mark given to the material to be inspected by the marking means, and wherein the tracking means issues a marking command. Monitoring means for monitoring whether or not the mark detection means has detected a mark during a time period when the output position and range of the material to be inspected have reached the arrangement position of the mark detection means. The marking device according to claim 1. 6. A mark photographing camera is used as the mark detecting means, and the quality of the mark is determined by using image data photographed by the camera in a corresponding position and range of the inspection material to which the tracking means outputs a marking command. The marking device according to claim 5, further comprising a determination unit for determining.