JP2000126815A - Method and device for correcting coiled shape of coil, and method and device for judging coiled shape of coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method and device for correcting the coiled shape of a coil by which edge breakage on the side face of a coil is easily and surely prevented and to provide the method and device for judging the coiled shape of the coil by which the coiled shape of the coil is detected at high speed and with high accuracy. SOLUTION: In this method and device 11 for correcting the coiled shape of the coil, the inside peripheral part in the side face Cx of the coil and axial inside surface of the coil C are cooled for a prescribed time from the binding of the coil C with a binding machine until the coiling axis C1 of the coil C is vertically laid. In this method and device 1 for judging the coiled shape of the coil, a light 2 (lighting means) and camera 3 (image picking-up means) are arranged at the job site of a coil conveying line and image processing is executed in an image processing part 4 about the side face Cx of the coil which is picked up with the camera 3 and, after that, the conditions of the side face of the coil are judged in a coiled shape judging part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil winding which corrects the winding of a coil when the rolled steel strip is wound into a coil shape by a winder. The present invention relates to a correction method and device, and a coil shape determination method and device for detecting a coil shape at high speed and with high accuracy.

[0002]

2. Description of the Related Art Generally, a strip is rolled and then wound into a coil by a winder and sent to the next step.
At the time of this winding, there is a mismatch between the speed at which the strip is fed to the winder and the speed at which the strip is wound by the winder, and an inappropriate tension applied to the strip by the rolling mill and the winder. The winding shape of a steel strip (hereinafter referred to as a coil) wound by a winder changes due to local occurrence of tying-up due to an increase in the number of windings,
Poor winding appearance in which the coil end faces are irregular. This poor winding appearance occurs remarkably in the inner peripheral portion of the coil end surface.

[0003] When a coil having a poor winding shape is transported to the next step, the coil winding axis is turned down on the conveyor by an upender from a state in which the coil winding axis is horizontal, that is, the coil winding axis is tilted vertically. In this state, the protruding portion of the coil end face breaks, causing a major trouble when rewinding in the downstream process, which is a quality problem. In addition, such a broken portion of the ear is cut down, which causes a reduction in yield. Such troubles occur remarkably in the case of thin materials.However, even in the case of thick materials, there are various transport problems such as the projecting part getting caught on the conveyor during transportation and the coil shifting or sliding down. May cause.

[0004] In a coil in which the above-mentioned defective winding has occurred, if the degree of defective winding is large, conventionally, a measure such as rewinding and re-winding to correct the coil end surface is provided. Is going. Also,
When the winding axis of the coil is tilted vertically with the up ender from the state where the winding axis of the coil is horizontal, due to the weight of the coil,
Such a treatment may be performed because the rolled surface protruding from the coil end face may retreat into the coil end face.

On the other hand, the winding form of the coil is judged visually by an operator or by using a gauge, and in addition, for example, in JP-A-48-72062, a high-pressure mercury lamp, a condensing mirror, a lens and a slit are disclosed. A light beam is applied to the coil end face from a dedicated illumination device consisting of: an image taken by an imager arranged diagonally above the coil end face, and the captured image is scanned to generate a pulse signal corresponding to irregularities on the coil end face. There has been proposed a method in which a pulse generator is used, and the number of pulses is counted by a pulse counter to detect the winding shape of the coil to determine the quality.

[0006]

However, in order to prevent breakage of the ears, a measure of rewinding and rewinding the coil to prepare the coil end face requires a time and labor for unwinding and winding. There was a problem that it was inefficient. In addition, measures such as retreating the rolled surface protruding from the coil end surface into the coil end surface by the weight of the coil are effective in the case of a relatively thick or hard band, but a thin or soft band. In the case of (1), ear breakage occurs due to the weight of the coil, so this is not a fundamental solution.

[0007] In addition, the expected treatment for the weight of the coil is that even if the coil is thick or hard, when the winding shaft is tilted vertically by the upender, a large rolled surface protrudes from the coil end. Since a load is applied, a flaw may be generated at the end of the rolled surface protruding from the coil end surface, and as a result, it is not suitable for practical use.

Further, when the quality of the winding of the coil is determined by a conventional method using a visual inspection or a gauge by an operator, the burden on the operator in a bad environment and the ambiguity of the judgment standard for each operator Is a problem, and above all, there is a problem that efficiency is poor.

Furthermore, the apparatus disclosed in Japanese Patent Application Laid-Open No. 48-72062, in which the work performed by the worker is implemented, requires many auxiliary facilities such as a high-pressure mercury lamp, a condensing mirror, a lens, and a slit. In addition to the problem that the apparatus becomes complicated and raises the cost of the entire apparatus, in the above configuration, high temperature, dust,
It is difficult to cope with water, oil and narrow space conditions,
Moreover, if maintenance is neglected, detection accuracy will be affected.
There is also a problem that frequent maintenance is required to maintain use.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a method and an apparatus for correcting a coil winding shape, which can easily and surely prevent a break of a coil end face.
In addition, a coil winding judgment method that can detect the coil winding at high speed and high accuracy, and a low cost and simple configuration that does not require many additional facilities An object of the present invention is to provide a coil winding shape judging device which can easily correspond to various conditions and can measure even in a bad environment.

[0011]

In order to achieve the above-mentioned object, the present invention relates to a method for binding a coil with a binding machine, and for a predetermined time until the winding axis of the coil is tilted vertically by an upender.
By cooling the inner peripheral portion of the coil end surface and the inner surface of the shaft of the coil, the steel strip wound in a coil shape is contracted, and the rolled surface protruding from the coil end surface is quickly retracted into the coil end surface by the contraction. It was.
This makes it possible to easily and reliably prevent ear breakage.

Further, according to the present invention, a lighting means and an image pickup means are arranged at the site of a coil transfer line, and image processing is performed on the coil end face picked up by the image pickup means so as to determine the state of the coil end face. It was done.
This makes it possible to determine the state of the coil end face at high speed and with high accuracy, and to cope with a bad environment.

In the present invention, the condition of the coil end face means that the position of the coil end face is indispensable, and the detection result of one or both of the amount of the rolled face protruding from the coil end face and the number of the rolled face protruding from the coil end face. Say.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present inventor has noticed that a steel strip conveyed through a rolling process has been thermally expanded for a while in a high-temperature state. If the wound shape is poor when it is wound up, if it is cooled and the coiled steel strip shrinks, a gap can be created in the winding interval of the steel strip and the coil end face can be adjusted. He knew what he could do and made the following invention.

[0015] That is, in the coil winding straightening method of the present invention, the coil wound by the winding machine is wound on the coil by the winding machine, and then the winding shaft of the coil is wound on the up ender. For a predetermined period of time before tilting vertically, the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the shaft of the coil are cooled, and the rolling surface protruding from the coil end surface to the up-ender side is retracted. .

The water winding mechanism for correcting the winding shape of the coil of the present invention for carrying out the above method is provided so as to face the coil end face in the vicinity of the upender, and the step is performed in accordance with the movement of the coil end face position. The angle is changed, and water is injected so that the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the coil shaft can be cooled.

That is, the coils moving on the transport line include a wide coil and a narrow coil. Further, the coil is mounted on a coil car, moves from the binding machine to the up ender, and is further wound by the up ender. The spindle is tilted so that it is vertical. In such a situation, in order to cool the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the shaft of the coil with respect to the coil end surface, the water injection mechanism in the coil winding correction device having the above-described configuration includes a coil car. When moving from the winder to the up ender via the tying machine, the water spray angle is adjusted stepwise according to the coil end face position (corresponding to the coil width) between the tying machine and the up ender. I changed it.

In the above-mentioned coil winding correction,
In order to always cool the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the coil when water is injected into the coil, it is necessary to detect the position of the coil end surface and the coil end surface, and if necessary, the coil end surface If one or both of the amount and the number of rolled surfaces protruding from the coil are detected, the coil can be cooled accurately.

Accordingly, the coil winding straightening method of the present invention comprises:
At a predetermined time until the winding axis of the coil is tilted vertically by the upender, the coil winding appearance determination method of the present invention described below is performed, and based on the determination of the state of the coil end surface, the inner circumference of the coil end surface on the upender side is determined. The inner surface of the shaft of the coil and the coil is cooled, and the rolled surface protruding from the coil end surface is retracted.

An apparatus for carrying out the above-mentioned coil winding correction method comprises an illuminating means for irradiating the coil end face, and an imaging means for picking up an image of the coil end face illuminated by the illuminating means, in order to carry out the coil winding determining method. Means and an image picked up by the image pick-up means are processed to detect at least the coil end face and the position of the coil end face and, if necessary, to detect one or both of the amount and the number of rolled surfaces protruding from the coil end face And a winding determination unit that determines the winding of the coil based on the detection result by the image processing unit. The water jet angle is changed stepwise so as to cool the inner peripheral portion of the coil end surface and the inner surface of the coil, and the water jet is turned on or off according to the winding shape of the coil. Those having a water injection control means for performing.

By doing so, it is possible to perform control such as changing the water injection angle of the water injection mechanism or appropriately switching the water injection mechanism having a different angle according to, for example, the position of the coil end surface. If the state of the coil end surface is determined and the coil winding is normal, it is possible to perform control such that water is not injected.

Then, the coil winding appearance determining method of the present invention
A method of detecting a winding shape of a coil moving from a binding machine to an up ender, which illuminates an area where a coil end face moves, captures an image, captures the captured area, sets a high binarization level in advance, and sets an image. After processing, the binarization level is gradually reduced from this state to detect the coil end face, and then the state of the coil end face is determined.

Further, in the coil winding shape judging method according to the present invention, in the above-described method, after the binarization level is gradually lowered to detect the coil end face, an optimum level is determined based on the detected luminance level near the coil end face. The state of the coil end surface is accurately determined by automatic binarization level setting for automatically resetting the binarization level.

In the coil winding shape judging method according to the present invention, the state of the coil end face detected by using the image processing technique is judged. Therefore, the coil winding shape determination method of the present invention
In order to improve the image processing speed and reduce disturbance noise, only the necessary area, that is, only the minimum necessary area of the coil end face is detected. In addition, the coil winding shape determination method can accurately determine the state of the coil end surface by setting an optimal binarization level.

More specifically, the detection of the coil end surface in the imaging area is performed as follows. The lighting means
For example, the right half of the coil end face is illuminated obliquely, and the imaging means images the right half of the coil end face obliquely. This is to reduce the load on image processing by emphasizing the difference in brightness in detecting the number and amount of rolled surfaces protruding from the coil end surface, as described later, for example.

Here, in the coil winding shape determination method of the present invention, as shown in FIG.
Instead of performing image processing on the entire area imaged by the imaging means, an image processing area (hereinafter, this area is referred to as an “edge search window”) is set in the imaging area, and an image in the edge search window is captured. Processing is performed. This end face search window has a rectangular shape, the Y coordinate is fixed so as to have a minimum necessary size, and the X coordinate is updated or changed.

At first, since the binarization level is set high, nothing is detected unless a pure white image is included in the imaging area. At this time, the right end of the coil end face is bright (white) because the coil end face is obliquely illuminated by the illuminating means, and the end face of the rolled surface protruding from the coil end face has a small width of the white portion. The width of the white portion of the normal coil end surface is much larger than that of the end surface of the protruded rolled surface. In this case, the left half of the coil end surface and the coil peripheral surface are dark (black) due to the illumination arrangement described above.

Thereafter, the images in the end face search window are sequentially taken in, and the binarization level is gradually reduced, so that the coil end face is detected in the end face search window as shown in FIG. Will be done. At this time,
In the end face search window, there is a possibility that there is an unnecessary image other than the coil end face. Therefore, for the target image data, for example, a contraction filter process of updating n times with the minimum luminance value in the X direction is performed. Once the white portion of the end face of the rolled surface protruding from the detected coil end face is removed, only the normal coil end face is left. Thereafter, the target image data is subjected to, for example, an expansion filter process of updating the maximum brightness value in the X direction n times, thereby obtaining the image data shown in FIG.
As shown in (c), an image is obtained for a reference position of a normal coil end surface.

Thereafter, as shown in FIG. 9C, the minimum value of the X coordinate of the coil end face in the end face search window is obtained by the fillet diameter measurement processing for obtaining the minimum and maximum coordinates of the range where the image having the predetermined brightness or more is located. X1 and the maximum value X2 are detected. Note that, based on the coordinates detected at this time, a region (hereinafter, this region is referred to as a “measurement window”) that surrounds only the coil end surface in a rectangular shape is formed in the end surface search window. Then, after the detection of the coil end face and the detection of the coil end face position are completed, the state of the coil end face is determined.

The coil end face position detected as described above is
Naturally, when approaching the up-ender side, the detected end face position X1 becomes smaller (moves to the left in FIG. 9C), and based on this, the angle of water injection is changed stepwise. That's it.

Further, the coil winding shape judging method according to the present invention is characterized in that, after detecting the coil end face and the position of the coil end face, the amount of the rolled face protruding from the coil end face, One or both of the number is detected, and the determination is made based on the detection result.

In order to detect the amount of the rolled surface protruding from the coil end face, after the coil end face and the position of the coil end face are detected, the image data to be targeted in the measurement window, for example, the image data adjacent in the X direction is detected. The amount of the coil projecting from the end face of the coil is detected by performing the second derivative processing for updating and enhancing the luminance value with the absolute value of.

On the other hand, in order to detect the number of rolled surfaces protruding from the coil end face, a predetermined threshold value is set in the image data in the measurement window after the coil end face and the position of the coil end face are detected. The number of protruding rolling surfaces is detected by performing projection addition processing for counting the rising and falling points of the luminance at the threshold value.

By doing so, it is possible to control the water injection in accordance with the condition of the coil end surface, so that water is not injected even though the winding of the coil is normal. It is possible to perform efficient control such that water is appropriately jetted only when the winding shape is abnormal.

Further, if the apparatus for implementing the above-described coil winding appearance judging method of the present invention is configured as follows, it is possible to further improve the image processing speed and reduce the disturbance noise. .

That is, the coil winding shape judging device of the present invention processes an illuminating means for irradiating the coil end face, an imaging means for imaging the coil end face illuminated by the illuminating means, and an image taken by the imaging means. An image processing unit that detects at least the coil end surface and the position of the coil end surface, and if necessary, detects one or both of the amount and the number of the rolling surfaces protruding from the coil end surface, and the detection by the image processing unit. A winding determining unit that determines a winding of the coil based on the result, wherein the imaging unit is provided diagonally above and separated from the coil end surface by a predetermined distance between the illumination unit and the coil end surface. It is.

With respect to the arrangement of the imaging means in the above configuration, the inventor has found the following as a result of arranging the imaging means (camera) at the following positions.

When an image is taken from a position perpendicular to the coil end face, the amount of protrusion of the rolled surface projecting from the coil end face can be accurately detected. However, when the outermost peripheral portion of the coil end face protrudes, the detection accuracy is reduced. However, if the camera position is moved according to the change in the coil width, the amount of protrusion can be detected. When the image is taken from an oblique direction of the coil end surface, the detection accuracy of the rolled surface protruding from the coil end surface is inferior to the above, but one camera can be used up to a coil width of 600 to 2000 mm by correcting the imaging angle. It could be detected by fixed arrangement.

When the image was taken from a direction perpendicular to the coil end face, the detection accuracy was low in both the position of the coil end face, the amount and the number of rolled surfaces projecting from the coil end face. When arranged in accordance with the lighting means, the coil end face position, the amount of protrusion of the rolled surface from the coil end face, the number of protrusions are both good,
In particular, when the image of the specular reflection portion desired to be viewed was taken from the same direction as the illumination means, the result was good.

Therefore, the image pickup means is good as a result of the above-mentioned. In particular, the image pickup means is provided with a predetermined position relative to the coil end face above a position deviated to the left or right of the coil end face provided with the illumination means. An imaging center is set at the center of the coil, and the imaging center is inclined by 50 ° ± 10 ° in the vertical direction, and the imaging center is inclined by 5 ° to 30 ° with respect to a plane parallel to the coil end face. It is preferably provided at the front and rear positions. By doing so, the coil end surface can be clearly imaged.

Further, in addition to the above configuration, the coil winding shape judging device according to the present invention may further comprise: illuminating means at an obliquely upper position separated from the coil end face by a predetermined distance with respect to the same plane as the coil end face. If the planes including are substantially perpendicular to each other, it is possible to further enhance the density (brightness and darkness) of the reflected light with the rolled surface protruding from the coil end face, so that the processing speed can be improved and the influence of disturbance noise can be achieved. Hard to receive.

As described above, since the coil winding shape judging device of the present invention processes and detects the image of the coil end face that has been taken, there are few facilities exposed to the outside, It is possible to easily deal with dust, water, oil, and a narrow space, and it is possible to clearly image the coil end surface.

The coil winding correction device of the present invention
As described above, the image processing is performed on the coil end face imaged by optimally arranging the illumination means and the imaging means to detect one or both of the position of the coil end face, the amount of the rolling surface protruding from the coil end face, and the number of sheets. However, if the water injection mechanism is controlled by the water injection control means based on the detection result, it becomes possible to automate the correction of the coil winding, and the coil winding is correctly corrected, and the correction is performed on the conveyor. Even if it is placed on its side, the rolled surface protruding from the coil end face does not break.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a coil winding shape judging device and a coil winding straightening device using the same according to the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a light, a camera, and a coil winding shape determining apparatus and a coil winding shape correcting apparatus of the present invention.
This shows the arrangement of nozzles. FIG. 2 shows a detailed arrangement of lights and cameras of the coil winding shape determining device and the coil winding shape correcting device of the present invention. FIG. 3 shows a schematic configuration of the coil winding shape determining device and the coil winding shape correcting device of the present invention. FIG.
Indicates the injection state of the nozzle. 5 to 8 show a coil winding shape determination procedure and a coil winding shape correction procedure. 9 to 11
Shows an end face search window and a measurement window display in the imaging region.

In FIG. 1, reference numeral 51 denotes a winder for winding a steel strip (not shown) into a coil. Reference numeral 52 denotes a moving range of a coil car (not shown) that transports the steel strip (hereinafter, referred to as a coil C) wound by the winder 51 to a predetermined position. 53
Is a binding machine that binds the coil C at a predetermined location within the moving range 52 of the coil car. Reference numeral 54 denotes an up-end which turns so that the winding axis C1 of the coil C transported by the coil car is vertical. 55 is an up ender 54
Is a conveyor for transporting the coil C with the winding shaft C1 being vertical to the next step.

The coil winding shape judging device 1 of the present invention, as a part of the coil winding straightening device 11 of the present invention to be described later, is used as an illuminating means in the vicinity of the winder 51, that is, obliquely forward in the transport direction of the coil car. Light 2 and, for example, a two-dimensional CCD camera 3 (hereinafter abbreviated as camera 3) as imaging means
Are provided as shown in FIG. That is, light 2
The plane 2a including the optical axis of the light 2 is shifted to the right of the coil end face Cx so as to irradiate either the left or right half of the end face Cx of the coil C (hereinafter, referred to as the coil end face Cx), that is, the right half in this embodiment. In the biased position, the center plane 53a of the binding machine 53
The bundling machine 53 is provided so as to be substantially perpendicular to the work surface 53b.

Further, the camera 3 is positioned at a position separated from the coil end face Cx by a predetermined distance above a position biased toward the side where the light 2 is provided (that is, right side) on the coil end face Cx. The work surface 53b of the binding machine 53 is inclined at an angle of, for example, 30 ° with respect to a plane parallel to the center plane 53a.
Is provided so that an angle between a plane perpendicular to the plane and a plane including the optical axis 3a of the camera 3 is, for example, 50 °.

That is, the light 2 irradiates only the portion required for imaging by the camera 3 on the right half of the coil end surface Cx, and the camera 3 images only the portion illuminated by the light 2. Have been placed. By doing so, the influence of disturbance light can be suppressed, and the coil end face Cx
A rolling surface portion (hereinafter referred to as a protruding portion P) protruding from
An image in which the normal coil end surface Cx is clear can be obtained.

Further, as shown in FIG. 3, the coil winding form judging device 1 processes the image picked up by the camera 3 to detect at least the coil end face Cx and the position of the coil end face Cx, and Accordingly, based on the detected coil end surface Cx and the position of the coil end surface Cx, the amount of the protrusion P, the protrusion P
An image processing unit 4 that detects one or both of the numbers of the images, and a winding appearance determining unit 5 that determines the state of the coil end surface Cx based on image data from the image processing unit 4.

Further, the coil winding shape judging device 1 having the above configuration
Is provided with a water injection mechanism that injects water onto the coil end face Cx when the winding shape of the coil C is determined to be defective by the winding shape determining unit 5. As shown in FIG. 1, two cooling water jets are vertically arranged in a side view at a position facing the winding axis C1 of the coil C in a plan view, as shown in FIGS. 3 and 4. And a nozzle control unit 14 as a water injection control unit for controlling the first nozzle 12 and the second nozzle 13. Then, the coil winding corrector 11 switches the first nozzle 12 and the second nozzle 13 by the nozzle controller 14 based on the determination by the winding determiner 5 of the coil winding determiner 1 to perform water spray control.

The correction of the coil end surface Cx by water injection is performed by uniformly jetting the inner peripheral portion (projecting portion P) of the coil end surface Cx and the inner peripheral surface of the coil C for cooling. But,
The coil C has a difference in width and a change in the distance to the first and second nozzles 12 and 13 when moving. Therefore, the first nozzle 12 and the second nozzle 13 of the coil winding corrector 11 of the present embodiment are provided based on the following experimental results in order to always spray water to the above-described locations.

With respect to the cooling water spray nozzle, 0 °, 25 °
As a result of previously experimenting with nozzle angles of ゜ and 90 °, at 0 °, the water spray portion concentrates on one point and is difficult to spray water on the inner peripheral portion of the coil end face Cx, and water is evenly sprayed on the axial inner surface of the coil C. It is not easy, and at 25 °, water can be sprayed on the inner surface of the axis of the coil C. However, depending on the width of the coil C, it is not easy to spray water evenly on the inner surface of the axis of the coil C.
At 90 °, the watering portion was too wide and it was not easy to water the inner surface of the coil C.

The cooling water sprinkling nozzle was tested for nozzle shape. As a result, when the water pressure was 5 kg / cm ² , the flow rate was 100 L / min, and the watering distance was 0 to 2000 mm, the cooling water sprinkling nozzle was rotated in a screw shape to sprinkle a donut shape. It was preferred to use a possible hollow cone nozzle.

Further, as a result of an experiment on the number of cooling water sprinkling nozzles, it is difficult to cope with a change in the width of the coil C and a change in the front and rear positions of the coil C when the nozzle is jetted from one position using a nozzle having a fixed angle. It turns out. However, as long as the nozzle can change the angle, it can correspond to even one position.

Based on the above experimental results and the calculation of the width of the coil C, the coil end face Cx, and the distance between the nozzle, the coil winding straightening device 11 of this embodiment has a nozzle shape of a hollow cone and a diameter of 35 ± 5 °. No. 1 adjustable nozzle angle in range
Nozzle 12 and a nozzle shape of hollow cone, 80 ° ±
A second nozzle 13 whose nozzle angle can be adjusted within a range of 7 ° is arranged in a vertical direction in the state shown in FIG. Then, these are switched and controlled.

FIG. 4 shows a state of water spraying when the first nozzle 12 and the second nozzle 13 of the coil winding corrector 11 of the present invention are switched and used. The condition shown in FIG. 4 is that the pressure of the cooling water from the first nozzle 12 and the second nozzle 13 is 5 kg / c.
m ² , the flow rate is 100 liter / min, when the coil inner diameter is constant, when the coil width is narrow (coil narrow width), or when the watering distance is long, the first nozzle 12 is used and the coil width is wide (coil wide ) Or when the watering distance is short
Nozzle 13 was used. In this case, as shown in FIG. 4, by switching the first nozzle 12 and the second nozzle 13,
According to the width of the coil C and the front and rear positions of the coil C, water could always be sprayed on the inner peripheral portion of the coil end surface Cx and the inner surface of the axis of the coil C.

Further, by disposing the first nozzle 12 and the second nozzle 13 in the coil end face receiving portion of the up-endr 54, the up-endr 54 can be set at a predetermined angle (for example, 4 degrees).
5 °), water could be efficiently sprayed on the inner surface of the coil shaft by the second nozzle 13 which is a wide-angle nozzle, and the cooling effect could be improved.

Further, the coil winding shape judging device 1 and the coil winding shape correcting device 11 are commonly used, for example, a monitor 6 for confirming the winding shape judging condition of the coil end face Cx. An alarm operation unit 7 for notifying the user of the situation and a coil conveyance control unit 8 for controlling the conveyance of the coil C are provided.

Next, a coil winding shape determining method and a coil winding shape correcting method will be described based on the operations of the coil winding shape determining device 1 and the coil winding shape correcting device 11 of the present invention. First, a schematic procedure for correcting the winding shape of the coil C will be described below. The coil winding corrector 11 can select whether or not to use automatic cooling as shown in # 51 of FIG.
When the automatic cooling is not used (not used in # 51), a standby state is set. On the other hand, if automatic cooling is used in # 51 in FIG. 8 (used in # 51), automatic injection or semi-automatic injection can be selected in # 52.

For example, when the use of automatic cooling is selected in # 51 and the automatic injection is selected in # 52, the processing is performed in the following procedure. In the case of automatic injection, it is determined whether or not water is to be injected based on the state of the coil end surface Cx by a coil winding appearance determination procedure. The coil winding shape determination procedure is roughly divided into detection of the coil end face Cx and detection of the coil end face Cx position,
In addition, for example, in this embodiment, both the detection of the amount of the protrusion P and the detection of the number of the protrusions P on the coil end surface Cx are performed. Then, the condition of the coil end face Cx is determined based on the detection result of the amount and the number of the projecting portions P on the coil end face Cx,
When the coil winding is poor and water is sprayed, the first nozzle 12 and the second nozzle 12 are connected based on the position detection of the coil end surface Cx.
The nozzle 13 is switched and water is jetted.

The processing in FIG. 5 includes detecting the coil end face Cx,
The procedure for detecting the position of the coil end face Cx is shown.

The outline of the processing in FIG. 5 is as follows.
Is performed only once, and until the measurement start signal that is output when the coil C arrives at the binding machine 53 is # 2,
To # 5 and # 6 to # 9 to # 2 are repeated.

Since the binarization level in the end face search window (FIG. 9) W1 set here is set high in advance, the procedure of # 2 to # 5 and # 6 to # 9 to # 2 is not performed. When the coil end face Cx cannot be detected, and the measurement start signal is output in # 9, # 12, # 13, # 7 to #
The process is repeated until the binarization level is lowered at 10 and the coil end face Cx can be detected, and the coil end face Cx is detected.
Is detected, the optimal binarization level and the filter are reset in # 11 based on the luminance level around the coil end face Cx detected at this time. Further, an optimum binarization level and a filter used for detecting the amount and the number of the protruding portions P on the coil end surface Cx at this time are set.

That is, in the initial state of the coil winding determination device 1 (a state in which it does not pass through # 12 to be described later), the binarization level is set to a considerably high level. Therefore, the image is taken by the camera 3 and displayed on the monitor 6. The entire imaging area to be displayed is displayed dark, and nothing can be detected. Since the coil winding appearance determining device 1 starts the following processing from this state, erroneous detection due to disturbance noise can be reduced.

In # 1, the initial setting is # 8 to be described later.
Resetting the flag indicating that the automatic binarization processing has passed, returning the search range of the end face search window W1 of # 3 described later to the initial value, returning the binarization setting value of # 6 to the initial value, the first The switching information of the nozzle 12 or the second nozzle 13 is initialized (selecting the first nozzle 12).

The end face search window W1 needs to be set large so as to reliably catch the coil end face Cx. However, in order to improve the image processing speed, at least the horizontal direction (X direction) of the imaging area is required. Is set to be large and can be varied, and the length in the vertical direction (Y direction) of the imaging region is set to a minimum necessary size and fixed. This is the same in a measurement window W2 described later. Therefore, in # 1, the maximum and minimum values of the X coordinate are set in the imaging area as shown in FIG. 9A. And
After the measurement of the processing time is started (# 2), the X coordinate value of the end face search window W1 is set using the initial value set in # 1 (# 3).

Thereafter, an image of the area of the end face search window W1 set in # 3 is fetched (# 4), and it is determined whether or not the measurement end signal has been turned on (# 5).

In step # 5, it is determined whether or not the measurement end signal has been output when the coil C arrived at the up-ender 54 at # 58 in FIG. 8 and the up-end 54 started turning. The predetermined time during which the measurement end signal is output (ON) at # 5 (YES at # 5) returns to # 1, and after the predetermined time has elapsed, the output of this measurement end signal is stopped (NO at # 5). ), Proceed to # 6.

In # 6, the value of the binarization level is set once for the area in the end face search window W1 using the value of the binarization level set in # 1. Subsequently, in # 7, in the end face search window W1, contraction / expansion processing is performed to detect the coil end face Cx, and fillet diameter measurement processing is performed to detect the position of the coil end face Cx.

In step # 7, the coil end surface Cx is detected by performing the contraction / expansion process, and the position of the coil end surface Cx is detected by performing the fillet diameter measurement process. When passing through # 7, #
Since the binarization level is the high binarization level set in # 6 using # 1, the X coordinate of the coil end face Cx cannot be detected. Of course, if a low binarization level is set in advance, the coil end face Cx can be detected quickly.
On the other hand, since it is easily affected by disturbance noise and the frequency of erroneous detection increases, in the present invention, when the coil end face Cx cannot be detected after passing through # 7, the binarization level is gradually reduced. I have.

In # 8, it is determined whether or not the vehicle has passed through # 11 described below. That is, # 9, FIG. 6, and FIG.
When returning to # 2 in FIG. 5 and repeating the processing, the coil end surface C
Since the x detection and the position detection of the coil end face Cx have been performed, the binarization level is determined to be an appropriate value, a flag indicating that an appropriate binarization level has been set is set, and the binarization level after # 8 is set. Is skipped (YES in # 8). Since the vehicle passes through # 8 for the first time during the coil winding appearance determination procedure, the flag indicating that the vehicle has passed # 11 is not set (NO in # 8), and the process proceeds to # 9.

In # 9, as described above, # 53 in FIG.
In step (1), whether or not the coil C has arrived at the binding machine 53 is detected, and the state of the measurement start signal output from the coil transport control unit 8 to the image processing unit 4 via the nozzle control unit 14 is determined. I have. In other words, when the coil C arrives at the binding machine 53 and it is ready to inject water from the first nozzle 12 or the second nozzle 13, the measurement start signal is turned on, and the coil C arrives at the binding machine 53. If not, the measurement start signal is off.

If the measurement start signal is not turned on at # 9, that is, if the coil C has not arrived at the binding machine 53 (NO at # 9), the process returns to # 2 and the measurement start signal is turned on. The process is repeated until the result is (YES in # 9). When the measurement start signal is turned on in # 9 (# 9
YES), proceeding to # 10, in # 10, whether the coil end face Cx was detected in # 7, that is, necessary for subsequent detection,
It is determined whether the position of the coil end face Cx has been detected and whether the binarized level has been detected.

Now, in the coil winding shape determination procedure, # 1
When the signal passes through 0 for the first time, since the binarization level is set to be high as it is, the coil end face Cx cannot be detected in # 7 (NO in # 10). Lowering the level of search, end face search window W1
(# 13), the coil end face Cx is detected in O. in # 10. Until K (YES in # 10), # 7
Then, the process of detecting the coil end face Cx and detecting the position of the coil end face Cx is repeated.

When correction is made so as to gradually decrease the binarization level by passing through # 12 and # 13 many times, FIG.
As shown in (b), when the coil end face Cx gradually appears in the end face search window W1 and thereafter, the detected coil end face Cx is subjected to the contraction and expansion processing at # 7 and the fillet diameter measurement processing is performed. When the X coordinate values X1 and X2 of only the coil end face Cx are detected and the position of the coil end face Cx can be detected (YES in # 10), as shown in FIG. Proceed to. In step # 11, when the required X coordinate of only the coil end face Cx is detected in step # 7, the binarization level at this time is reset as an optimum state. At # 11, the measurement window W2 is displayed in the end face search window W1.

Further, in step # 11, it is assumed that the positions of the coil end face Cx and the coil end face Cx have been detected, so that the optimum binarization level is reset based on the luminance levels around X1 and X2 at this time. The optimum binarization level and filter set used for detecting the amount of the protruding portion P of the coil end surface Cx to be detected, and the optimum binarization level and filter set used for detecting the number of the protruding portions P of the coil end surface Cx are set. Go and flag. As a result, the result of # 8 does not become NO.
11, # 12 and # 13 do not pass.

Next, the procedure of FIG. 6 will be described. FIG.
Is performed when the automatic injection is selected at # 52 in FIG.
This is a nozzle switching process used when any of the semi-automatic injections is selected. In other words, the operation of injecting water is performed by selecting the automatic injection, semi-automatic injection, and in any case, detecting the coil end surface Cx and performing the position of the coil end surface Cx after performing the processing of FIG. The first nozzle 12 or the second nozzle 13 is switched based on the detection result.

In # 21 of FIG. 6, the X obtained in # 7 of FIG.
The coordinate values of the measurement window W2 set based on 1, X2 are set. In # 22, X1, X2 obtained in # 7 are set.
It is determined whether or not the range of the measurement window W2 (the detection result within) set based on the above is appropriate. If the detection result is proper in # 22 (YES in # 22), the flow proceeds to # 23. For example, if an error such as erroneous detection has occurred and is not proper (NO in # 22), the setting is made in # 21. The coordinate value immediately before the setting is set (# 24), and the process returns to # 2 in FIG. 5 ().
Start again from the end face position measurement. Generally, this process is not performed except when particularly large disturbance noise (for example, light such as welding light) enters the camera 3 and the process proceeds to # 23.

At # 23, it is determined whether the position of the coil end face Cx is closer to the up ender 54 or to the binding machine 53 than the predetermined position, and the end face position X1 determined at # 7 is determined.
(The number of pixels in the X direction) is corrected for the angle of the camera 3 and is converted into a distance (mm) in the X direction from the upender 54. If the number of pixels corresponding to the distance in the X direction is equal to or more than a predetermined value (YE in # 23)
S), if the coil end face Cx is approaching the up-endr 54 or is switched to the second nozzle 13 as the wide coil C (# 25), and if the number of pixels corresponding to the distance in the X direction is smaller than a predetermined value (NO in # 23) ), The coil end face Cx moves to a position far from the up-ender 54 or is switched to the first nozzle 12 as the narrow coil C (# 26).

If the measurement start signal is not on at # 27 (NO at # 27), that is, if the coil C has not arrived at the binding machine 53 at # 53 of FIG. 8, the process returns to # 2 of FIG. (), The process is repeated.
Since the measurement start signal is turned on at # 9, the process proceeds to FIG. 7 assuming that the measurement start signal is turned on at # 27 (YES at # 27).

The procedure shown in FIG. 7 is performed when the automatic start is selected in step # 52 of FIG. 8, and when the coil C arrives at the binding machine 53 in step # 53, the measurement start signal is turned on. This processing is performed only for a certain time, that is, when the automatic injection is selected, the coil is being bound, the binding is being completed, the coil is being moved, the up-ender 54 is turning, that is, # in FIG.
Until the measurement end signal 5 is turned on, the detection of the coil end face Cx and the position detection of the coil end face Cx in FIG.
This is always performed by the loop of S. In FIG. 7, the amount of protrusion P on the coil end face Cx and the number of protrusions P on the coil end face Cx are detected using the binarization level set in FIG.

In # 31 of FIG. 7, a measurement window W2 set based on X1 and X2 measured in # 7 of FIG.
Are set as an area range for detecting the amount of the protruding portion P on the coil end surface Cx, and in # 32, the binary value for detecting the amount of the protruding portion P also set in # 11 of FIG. The binarization level is set using the binarization level.

Thereafter, in the range of the measurement window W2, as shown in FIGS. 10A to 10D, the measurement window W2 is expanded based on X1 of the measurement window W2 detected as shown in FIG. 9C. , X1 based on X1,
X3 are sequentially detected based on X2. Then, the measurement window W2 is further expanded from, for example, X5 in FIG. 10, and if the protruding portion P of the coil end surface Cx is not detected any more, the expansion of the measurement window W2 is stopped, and measurement including X1 to X5 is now performed. For the range of the window W2, the second derivative processing is performed to emphasize the protrusion P of the coil end face Cx, and the amount (X1-X5) of the protrusion P is detected (# 33).

Here, the reason why the measurement window W2 is gradually expanded is that if the measurement window W2 is set to be large at one time, there is a high possibility that an unnecessary portion (such as noise) will be detected.

The weight per pixel (measured amount mm) depends on where the coil end face Cx is from the optical axis of the camera 3.
Is corrected (# 34), and at the same time, the range of the measurement window W2 that fluctuates with the angle correction of the camera 3 is also corrected (# 35).

Subsequently, in # 36, the measurement window W2
It is determined whether or not there is an abnormality in the setting of the range. If there is an abnormality in a state that cannot be normally considered due to sudden disturbance noise or the like (YES in # 36), the process returns to # 2 in FIG. The process is repeated, and if there is no abnormality (N in # 36)
O) In order to detect the number of projecting portions P on the coil end surface Cx, #
Proceed to 37. In # 37, within the range of the measurement window W2, the number of projecting portions P of the coil end face Cx is detected by the projection addition processing.

The processing in # 37 is as shown in FIG.
For the luminance waveform B of the protruding portion P in the measurement window updated as # 33, the rising point and the falling point at the threshold value SL of the predetermined luminance, for example, n1 to n8 in the present embodiment, are obtained. A point and a falling point are paired to make one sheet. Therefore, in the case of this embodiment, FIG.
As shown in FIG. 1, the rising and falling points are n1 to n1.
Eight points of n8, which are divided by two, and one pair (n7 and n8) of the outermost peripheral portion of the coil end face Cx is not counted as a normal coil end face Cx (-1), so (8/2) -1,
The number of protrusions P is three.

After that, the range of the measurement window W2 is corrected and returned to the end surface position measurement (# 38), and the measurement result is displayed on the monitor (# 39). Then, the coil end surface Cx
Is determined (# 40), that is, when it is determined that the winding is correct by comparing with a preset reference value (YES in # 40), the process returns to # 2 in FIG. When it is determined (NO in # 40), the first nozzle 12 or the second nozzle 12
A signal is output to the nozzle control unit 14 to turn on the nozzle 13 (# 41), and the process returns to # 2 in FIG.

The above description is about the coil winding shape determination process performed in # 54 of FIG. 8, and the determination result of # 40 in FIG. In the case of K (YES in # 40), the image processing determination is O.D. in # 54 of FIG. K (OK in # 54), the coil winding shape correction processing ends without spraying water. On the other hand, at # 40 in FIG. If it is not K (NO in # 40), a signal to turn on the nozzle is output in # 41,
As a result, in # 54 of FIG. Assuming that it is G (NG in # 54), the process proceeds to # 55 in FIG. 8 in response to the nozzle-on signal in # 41 in FIG.

On the other hand, even when the semi-automatic processing is selected in # 52 of FIG. 8, while performing the processing of FIG. 5 and FIG.
Proceed to 55. In # 55, it is determined whether the position of the coil end face Cx detected by the processing in FIGS. 5 and 6 is closer to the upender 54 or to the binding machine 53 than a predetermined position, and if it is smaller than a predetermined value (# 55, YES), water is jetted from the first nozzle 12 as the coil end face Cx is moving farther from the up-ender 54 or as the narrow coil C (# 56), and if it is equal to or more than the predetermined value (#) 55
YES), the water is injected from the second nozzle 13 as the coil C whose end face Cx is approaching the up-endr 54 or as the wide coil C (# 57).

When water is injected from the first nozzle 12 in # 56, when the coil C moves to a predetermined position in the direction of the up-endr 54 (that is, when the coil C exceeds the predetermined value determined in # 54), The first nozzle 12 is turned off and the second nozzle 13 is turned on (# 57). And
At # 57, water is continuously injected from the second nozzle 13, and at # 58, it is determined whether or not the up-ender 54 has turned for a predetermined time, and if it has turned (YES at # 58), the second nozzle 13 is turned off (#). 59), and end the process. On the other hand, in # 58,
If the up-ender 54 has not been turning for a predetermined time (NO in # 58), the process returns to # 55 and returns to the coil position Cx.
Is confirmed, and the processing up to # 58 is repeated.

In step # 58, when the coil C arrives at the up ender 54 and the up ender 54 turns until the coil C falls down at a predetermined angle, the nozzle controller 1
4 outputs a measurement end signal to the image processing unit 4. At this time, YES is determined in # 5 of FIG.

According to the above configuration and procedure, since the image processing method is used to detect the coil winding, the members exposed to the transfer site of the coil C are the light 2, camera 3,
Since it is the first nozzle 12 and the second nozzle 13, it was possible to correspond to various conditions around the coil transfer line.

Further, the processing load of the image processing is compensated for by arranging the lights 2 and the camera 3 as much as possible. In the image processing procedure, the binarization level is set appropriately.
By performing image processing of only a necessary part, the winding shape of the coil C is detected through detection of the coil end face Cx, detection of the position of the coil end face Cx, detection of the amount and the number of protrusions P on the coil end face Cx. The time required to output the pass / fail judgment to the monitor 6 can be within 300 ms per cycle, and the detection accuracy of the position of the coil end face Cx and the amount of the protruding portion P can be improved despite high-speed processing. ± 5
mm, the detection accuracy of the number of protruding sheets can be made ± 1, and the accuracy of water spraying on the inner surface of the coil C can be made within ± 50 mm.

[0095]

As described above, the coil winding correction method and apparatus of the present invention provide a coil winding correction method for a predetermined period of time from when the coil is moved from the binding machine to when the winding axis of the coil is tilted vertically by the upender. The inner peripheral portion of the end face and the inner surface of the coil are cooled. As a result, the strip wound in a coil shape in a thermally expanded state contracts, and a gap occurs in the rolled surface of the rolled strip due to the contraction, and the rolled surface protruding from the coil end surface is moved to the coil end surface. It is possible to quickly retreat, so that it is possible to easily and surely prevent the rolled surface protruding from the coil end face from breaking.

Further, the coil winding appearance determining method and apparatus of the present invention perform image processing on an image of only the coil end face, detect the coil end face, and then determine the coil end face state. Further, when performing this image processing, the arrangement of the illuminating means and the imaging means may be illuminated only at a necessary portion of the coil end surface to take an image, thereby further increasing the speed of the image processing. Can be. In addition, since only the illumination means and the imaging means are arranged at the site of the coil transfer line, a simple and inexpensive configuration can be achieved without requiring many auxiliary facilities, and the maintenance is easy and the system can cope with a bad environment. Can be
Even in a bad environment, the coil winding shape can be determined with high speed and high accuracy.

[Brief description of the drawings]

FIG. 1 is a plan view around a winder showing an arrangement of an illuminating unit, an imaging unit, and a water injection mechanism in a coil winding appearance determining device and a coil winding straightening device of the present invention.

FIGS. 2A and 2B show details of an arrangement relationship between an illuminating unit and an imaging unit in the coil winding shape determining device and the coil winding shape correcting device of the present invention, wherein FIG. FIG.

FIG. 3 is a diagram showing a schematic configuration of a coil winding shape determining device and a coil winding shape correcting device of the present invention.

FIG. 4 is a view showing a state of water injection by a water injection mechanism in the coil winding correction device of the present invention.

FIG. 5 is a part of a procedure of a coil winding shape judging method in the coil winding shape correcting method of the present invention, and shows a procedure for detecting a coil end face and detecting a coil end face position and setting an appropriate binarization level. FIG.

FIG. 6 is a diagram showing a part of a procedure of a coil winding shape determining method in the coil winding shape correcting method of the present invention, and showing a procedure up to switching of a water injection mechanism based on a coil end surface position detection result.

FIG. 7 is a part of the procedure of the coil winding shape determination method in the coil winding shape correction method of the present invention, in which the amount and the number of rolling surfaces protruding from the coil end surface are detected to determine whether or not water injection is necessary. It is a figure which shows the procedure until it does.

FIG. 8 is a view showing a schematic procedure of a coil winding shape correcting method of the present invention.

9A and 9B show an image processing state in the coil winding shape determination method and apparatus according to the present invention, wherein FIG. 9A shows a state where an end face search window is set in an imaging visual field, and FIG. 9B shows a coil end face in the end face search window. FIG. 7C is a diagram illustrating a state where the position is to be detected, and FIG. 7C illustrates a state where an X coordinate serving as a reference of the coil end surface position is detected for controlling the water injection mechanism and setting a measurement window.

FIGS. 10 (a) to (d) show ranges of measurement windows for measuring the amount of protrusion and the number of rolled surfaces protruding from the coil end surface in the image processing situation of the coil winding shape determination method and apparatus of the present invention. It is a figure showing the update situation of.

FIG. 11A is a diagram illustrating a state of a steel strip protruding from an end face of a coil processed by a protrusion amount measurement window in an imaging visual field in an image processing state by the coil winding appearance determination method and device of the present invention; (b) is a diagram showing a situation in which the number of rolling surfaces protruding from the coil end surface is detected from the signal waveform in the projection addition measurement process.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 coil winding shape judging device 2 light (illuminating means) 3 camera (imaging means) 4 image processing unit 5 winding shape judging unit 11 coil winding straightening device 12 first nozzle (water injection mechanism) 13 second nozzle (water injection mechanism) 14) Nozzle control unit (water injection control means) W1 end surface search window W2 measurement window C coil Cx coil end surface P Projection (rolled surface projecting from coil end surface)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Hamata 1850 Minato, Wakayama City, Wakayama Prefecture F-term in the Wakayama Works, Sumitomo Metal Industries, Ltd. 3F064 AA06 EA10 EB15 4E026 AA11 BA11 DA03 DA18

Claims (11)

[Claims] 1. A predetermined time until a coil wound around a rolled strip is wound by a winder, the coil is bound by a binding machine, and a coil winding shaft is vertically lowered by an upender.
A method for correcting a coil winding shape, comprising cooling an inner peripheral portion of a coil end surface on an up-ender side and an inner surface of a shaft of a coil, and retreating a rolled surface protruding from the coil end surface to the up-ender side. 2. The method according to claim 1, wherein the coil end face is provided so as to face the coil end face in the vicinity of the upender, and the angle is changed stepwise with the movement of the coil end face position.
A water injection mechanism for coil winding correction, wherein water is injected so as to be able to cool the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the coil shaft. 3. A method for detecting a winding shape of a coil moving from a binding machine to an up-ender, wherein the area in which the coil end face moves is illuminated, imaged, and the imaged area is captured to obtain a high binarization level in advance. And performing image processing, gradually decreasing the binarization level from this state, detecting the coil end face, and then determining the coil end face condition. 4. An image pickup range is taken in, a high binarization level is set in advance, and image processing is performed.
After detecting the coil end face by lowering the binarization level, the optimum 2 based on the detected luminance level near the coil end face.
4. The coil winding shape judging method according to claim 3, wherein the coil end surface condition is accurately judged by an automatic binarization level setting for automatically resetting a binarization level. 5. A coil end surface condition is detected by detecting one or both of an amount of a rolled surface protruding from the coil end surface and a number of rolled surfaces protruding from the coil end surface after detecting the coil end surface and the position of the coil end surface. The method according to claim 3, wherein the determination is performed based on a detection result. 6. The method according to claim 3, wherein after detecting the coil end face and the coil end face position, the coil end face is moved stepwise in accordance with the detected coil end face position. Wherein the angle is changed to spray water so as to cool the inner peripheral portion of the coil end surface on the up-ender side and the inner surface of the shaft of the coil. 7. The method according to claim 5, wherein:
Detects one or both of the amount of the rolling surface protruding from the coil end surface and the number of the rolling surface protruding from the coil end surface, and the coil winding appearance is defective according to the coil end surface condition determined based on the detection result. Wherein the method is characterized by spraying water. 8. In order to perform a coil winding appearance determination method,
Illuminating means for illuminating the coil end face, imaging means for imaging the coil end face illuminated by the illuminating means, and processing of an image taken by the imaging means to detect at least the coil end face and the position of the coil end face, An image processing unit that detects one or both of the amount of the rolling surface protruding from the coil end surface and the number of the rolled surface according to the winding shape determination unit that determines the winding shape of the coil based on the detection result by the image processing unit Wherein the imaging means is provided diagonally above the illumination means and the coil end face and separated from the coil end face by a predetermined distance. 9. The coil winding form judging device according to claim 8, wherein the illuminating means is disposed diagonally above the coil end face and separated from the coil end face by a predetermined distance and including the optical axis with respect to the same plane as the coil end face. A coil winding shape judging device, wherein the coil winding shape judging device is arranged so as to be substantially orthogonal. 10. An illuminating means for illuminating a coil end face, an imaging means for imaging a coil end face illuminated by the illuminating means, and processing of an image taken by the imaging means in order to carry out the coil winding appearance judging method. An image processing unit that detects at least the coil end surface and the position of the coil end surface, and detects one or both of the amount of the rolled surface protruding from the coil end surface and the number of the rolled surface as necessary, And a winding shape judging unit for judging a winding shape of the coil based on the detection result, wherein the winding shape judging unit further includes an inner peripheral portion and a coil axis of the coil end surface on the up-ender side in accordance with the position of the coil end surface. The water injection angle is changed stepwise so as to cool the inner surface, and, in accordance with the winding shape of the coil, water injection control means for performing on or off control of water injection is characterized by having Coil winding correction device. 11. A coil winding correction device according to claim 10, wherein the coil winding determination device according to claim 8 or 9 is used.