JPH0827242B2 - Strip surface defect management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a surface defect management device for a strip that visually inspects a strip that is to be inspected for defects while running at a constant speed. More specifically, it is possible to accurately memorize and display the position and the degree of the defect of the surface of the strip, which is visually detected, in the entire strip while reducing the chances of operator's erroneous operation and erroneous judgment. It was done like this.

[Conventional technology]

Inspection of surface defects such as surface defects of strips such as thin steel plate,
While the worker runs the strip on the side of the strip line,
Various surface defects were visually detected, and as soon as these surface defects were found, the display pushbutton corresponding to the position of the strip was pressed to manage the display of the surface defects, but there are many erroneous displays due to erroneous operation or misjudgment. It was.

Therefore, instead of this means, a means for marking a surface defect portion of the strip with a pen or the like to identify a good product and a defective product has been adopted.

However, as the process speed increases, if there is a surface defect at a position with a certain width in the plate width direction, or especially if multiple strips with divided slits have surface defects at the same place, etc. There was a drawback that could not be addressed.

Conventionally, in order to solve this drawback, the quality information from the quality inspection device is stratified for each unit length of the running length of the strip, and the quality pattern of the strip is stored in a computer and grasped. A method and apparatus for inspecting a strip is disclosed in Japanese Examined Patent Publication No. 51-39184, but the one disclosed in Japanese Examined Patent Publication No. 51-39184 is, for example, a vortex flow as a defect detection means of a rolled material. Since a flaw detector is used, it is not possible to achieve the purpose of inspecting the surface defects and the degree of defects of the strip, and at the present time, it is not possible to demonstrate the defect detection capability beyond human visual inspection. Has become.

Also, inspect the surface defects and the degree of defects of the strip,
A means for displaying the inspection result on the corresponding surface portion of the strip is disclosed in Japanese Utility Model Publication No. 53-38671, but the means disclosed in Japanese Utility Model Publication No. 53-38671 does not detect detected defects. Indicates only where along the length of the strip, it is not possible to display in more detail where the defect is in the width direction of the strip. Since there is no effective measure to display the result of visual inspection in conformity with the corresponding strip position, the degree and position (coordinates) of the surface defect should be clearly indicated. It was not possible to do so, and there was still the unsolved fear of work such as re-sorting.

In this manner, the conventional strip surface defect inspection means merely displays and stores which portion in the length direction of the strip member is defective, and the detected surface defect is There has been no effective and reliable means for detecting and displaying the position in the width direction of the zonal band.

[Problems to be solved by the invention]

The inconveniences and problems in the above conventional example are
This is because there was no effective means for causing the work mark to perform accurate and reasonable identification and recognition between the divided width regions of the strip moving at high speed.
It is an object of the present invention to provide a means capable of accurately and reasonably identifying and recognizing between width regions of a strip.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention irradiates the divided width regions of the strip located in the vicinity of the inspection visual field range of the operator with identification light that is easy to visually identify each other, The operator can clearly and reasonably confirm in which width region of the strip the defect detected by the identification light is located.

Hereinafter, a strip surface defect management apparatus according to the present invention will be described with reference to the drawings showing an embodiment of the present invention.

A strip surface defect management device according to the present invention is a device for visually inspecting a surface defect of a traveling strip S and confirming and storing the inspection result.
, Which are located near the side of the strip S and are arranged across the path line of the strip S and individually correspond to the respective division positions of the strip S divided in the width direction. Light L
And a defect position signal indicating at which division position the surface defect of the strip S detected by visual inspection is divided in the width direction and the degree of the detected surface defect. A defect input device 5 having an input portion corresponding to each identification light L that outputs a defect level signal by an operator's operation and an easy input operation, and a length measuring device 3 for measuring the running length of the strip S. And the length measurement signal from the length measuring device 3 and the defect position signal and the defect level signal from the defect input device 5 to specify the position and degree of the detected defect in the entire strip S. And a computer 4 for storing the information.

Each identification light L emitted from the light projecting device 1 is emitted to the surface of the strip S near the inspection visual field range A of the surface defect of the strip S by an inspector (hereinafter referred to as an operator),
The operator who is paying attention to the inspection visual field range A can see it very naturally.

The operation panel 50 of the defect input device 5 is a part for inputting at which divided position of the strip S the surface defect visually detected by the operator and to what extent the surface defect is input. The position and degree of the defect are input to the computer 4 as a defect position signal and a defect level signal, respectively, and displayed on the operation panel 50.

The length measuring device 3 measures the passage length of the strip S that is traveling and conveyed, and outputs a length measurement signal, which is a signal for specifying the position of the strip S in the length direction, to the computer 4. To do.

The computer 4 constantly inputs the length measuring signal from the length measuring device 3, and in this state, the defect position signal and the defect level signal are inputted from the defect input device 5, whereby the length measuring signal and the defect position signal are inputted. The position (coordinates) and degree of the defect detected on the surface of the strip S by matching with the defect level signal are specified and stored.

[Operation] Since the strip surface defect management apparatus of the present invention is configured as described above, the operator inspecting the strip S for surface defects can detect the surface defect and, at the same time, detect it visually. By recognizing the identification light L that has been detected, it is possible to very naturally confirm at which division position of the strip S the detected defect is located. Therefore, the division position of the detected defect can be detected accurately. It can be input to the defect input device 5.

The defect position signal and the defect level signal input to the defect input device 5 are displayed on the operation panel 50 as they are and also output to the computer 4, and are compared with the length measurement signal constantly input by the computer 4, The position and degree of the defect in the entire strip S are specified and stored.

〔Example〕

The strip S that is inspected for surface defects by the device of the present invention may be a single thin steel plate having a large width, or a plurality of strip steels obtained by dividing and slitting a single thin steel plate at an appropriate width value. It may be. In particular, in the case of a plurality of strip steels with divided slits, it is possible to simultaneously inspect each strip steel in the state of being divided, and it is possible to dramatically improve the work efficiency of the surface defect inspection. it can.

In the case of the illustrated embodiment, the light projecting device 1 is provided on the downstream side immediately after the inspection visual field range A, which is a portion for inspecting surface defects in the pass line of the strip S.

In this light projecting device 1, at least the same number of light sources 11 such as lamps as the dividing positions are provided in a mounting frame 10 arranged across the path line of the strip S so that mutual emitted light beams do not interfere with each other. Attached to the light source 11 as a mask plate 12, for example, two slidably assembled to each other, and traveling through light-shielding plates 13 and 15 provided with slit holes 14 and 16 corresponding to each light source 11. The surface of the strip S is irradiated.

The two light-shielding plates 13 and 15 are provided in order to adapt the width of the identification light L emitted from each light source 11 to the surface of the strip S to the width of the divided positions. Shading plates 13, 15
Racks 19 and 23 are integrally provided at one end of
These racks 19 and 23 mesh with each other and
19 is fixed to the output shaft of the motor 17, and this motor 17
The light shielding plates 13 and 15 are slid in the opposite directions by the operation of, and the positional relationship between the slit holes 14 and 16 is changed, so that the projection width l of the identification light L (hereinafter simply referred to as width 1) is changed. Change.

The change adjustment of the width 1 of the identification light L is performed according to the number of division positions, and in some cases, a large width 1 value may be set as shown by the broken line in FIG. A light source 11 that does not need to be operated is generated. In such a case, the amount of relative movement of both light shields 13 and 15, that is, the motor 17
Since the width 1 of the identification light L can be known in advance from the number of rotations of the above, the number of rotations of the motor 17 is accurately adjusted by the pulse generator 21 or the like to set the width 1 of the identification light L, and the width l Is stored in the computer, the light source 11 which is no longer required to operate is brought into a non-operating state by operating the switch 54 shown in FIG. 4, and the positional relationship of the identification light L changed in this way is known. It can easily be set according to the number of active light sources 11.

The setting of the identification light L corresponding to the number of division positions of the strip S is performed by the motor 17 by a computer (not shown).
The rotary switch 22 interlocked with may automatically select the required light source 11 in accordance with the width 1 of the identification light L, or may manually select and set the light source 11.

The mask plate 12 is for facilitating the discrimination between the identification lights L by the operator. For this means, the identification lights L are made to have different colors, or the identification code is transmitted. The means of is adopted.

FIG. 2 shows an example of the configuration of the operation panel 50 of the defect input device 5. The upper part of the figure shows a defect push button which is a push button with an identification lamp that is pushed when a defect is detected corresponding to each divided position.
51 is provided, and a defect level push button 52, which is a push button with the same identification lamp, which is divided into multiple stages according to the degree of the defect detected corresponding to each defect push button 51, is provided in the lower stage.

That is, when the operator detects a defect of the strip S, the operator selects and presses the defect push button 51 identified corresponding to the identification light L of the defective division position, and corresponds to the defect push button 51. Found defect level push button 52 arranged,
Select and press according to the level of this defect. At this time, if the pressed defect push button 51 is turned on so as to be displayed with the same means as the identification means applied to the identification light L, it is possible to reduce the mistake in the identification of the detection division position. As a result, the selection of the division position can be confirmed, and the occurrence of errors can be eliminated accordingly.

The defective push button 51 may be lit by pressing the defective push button 51 once and then turning it off again, or by turning on the pressed button 51.

FIG. 4 shows a principle diagram of the control sequence of the defect input device 5. Each defect push button 51 and defect level push button 52 are connected to a control circuit section 53 which is connected in parallel to the power supply. Each control circuit unit 53 corresponds to a defect push button 51, a series circuit of a defect indicator 55 of this defect push button 51 and a relay 8, a defect level push button 52 and this defect level push button 52 between two power lines. The defect level indicator lamp 56 and a parallel circuit in which a series circuit is connected in parallel are inserted in parallel.

It should be noted that the output of the defect signal and the defect level signal to the computer 4 is preferably configured to be achieved under the condition that the defect push button 51 and the defect level push button 52 are turned on. This is because even if the defect push button 51 is mistakenly pressed, unless the defect level push button 52 is turned on, the signal of this error is calculated by the computer 4.
This is because you don't have to enter it into
This is because it can be solved by a simple operation called pushing the 51 again.

Further, the switch 54 for the light source 11 constitutes each contact of the rotary switch 22 in FIG. 3 showing the configuration example of the light projecting device 1.

Further, as the operation panel 50 of the defect input device 5, a configuration example in which one defect push button 51 and three defect level push buttons 53 are provided is shown, but for example, only the defect push button 51 is provided,
If the defect level is set according to the number of pressing operations of the defect push button 51 per unit time, the plurality of defect level push buttons 53 can be completely eliminated.

In the case of the embodiment shown in FIG. 1, the marking device 6 which operates in accordance with the defect signal output from the defect input device 5 on the downstream side of the inspection visual field range A and the installation location of the light projecting device 1 passes the pass line of the strip S. It is placed across.

The marking device 6 is provided corresponding to each division position, and the distance between the traveling speed of the strip S and the inspection visual field range A and the marking device 6 from the time when the defect signal is input from the defect input device 5. The marking operation is performed on the surface of the strip S after a time set in accordance with the above, thereby providing a reference for promptly displaying the detected defects on the surface of the strip S.

In the case of the marking device 6 shown in FIG. 1, a spray gun is connected to the paint supply pipe 61 and the compressed air supply pipe 60 provided across the pass line via the electromagnetic on-off valve 62 and the electromagnetic on-off valve 63, and the corresponding When the defective push button 51 of the control circuit unit 53 is turned on, the relay 8 that operates by turning on the both electromagnetic open / close valves 62,
The open state of 63 causes the coating material to be spray-applied to the target surface portion of the strip S after a preset period of time.

As the marking device 6, the spray gun described above is not specified, and the one using the coating roller shown in FIG. 5 or the one using the coating stamp shown in FIG. 6 can be used.

In the case of the marking device 6 using the coating roller 74 shown in FIG. 5, the compressed air supply pipe 60 whose opening and closing is controlled by the electromagnetic opening / closing valve 62 is connected to the cylinder 65 fixedly fixed by the fixing tool 64, and the cylinder 65 is fixed. Piston 66 and push-up spring 67 inside
Is provided, and a paint pot 70 having a paint injection port 71 is provided at the lower end of a stroke rod 68, which is a piston rod extending below the cylinder 65, via an intermediate cushion spring 69. 72 and squeeze roller
73, and a coating roller 74 having a cushion spring 76 and a cushion bar 75 are attached. When the solenoid on-off valve 62 is opened, compressed air is supplied into the cylinder 65, and the stroke rod 68 causes the elastic force of the push-up spring 67. Again, the coating roller 74 is pressed against the surface of the strip S to apply the paint to the surface of the strip S having a defect.

In the case of the marking device 6 using the coating stamp 77 shown in FIG. 6, its structure is the suction roller shown in FIG.
72, a squeezing roller 73, and instead of a coating roller 74 having a cushion spring 76 and a cushion bar 75,
The structure is such that a coating stamp 77 is provided, the other structure is exactly the same, and the coating operation is also the same as in the embodiment of FIG.

As a means for utilizing the marking device 6, the strip S
Not only by displaying the detected defects on the surface, but by marking the tail end side of the strip S, for example,
It is also possible to facilitate the final sorting of defective products.

〔The invention's effect〕

As is clear from the above description, the surface defect management apparatus for a strip according to the present invention, since the identification light for indicating the division position of the strip is located near the inspection visual field range by the operator, In the visual field of the operator who is inspecting the surface defect of the strip, the identification light corresponding to the division position of the strip that is inspected is always located. Whether or not it is a position can be recognized without fail at the same time as the detection of a defect, thereby making it possible to almost completely eliminate an error in the input operation of the detected defect to the defect input device, and also the dividing position of the detected defect. Since the recognition of the defect is inevitably achieved at the same time as the detection of the defect, the operation time from the defect detection to the input to the defect input device can be achieved extremely quickly, so that the pass line of the strip can be detected. Since it can follow speeding sufficiently and can inspect the strip by dividing it into widths, it can accurately, smoothly and quickly even if the inspection target is multiple slit strips running in parallel. In addition, it has many excellent effects such as the detection and management of surface defects.

[Brief description of drawings]

FIG. 1 is an overall arrangement perspective view showing an embodiment of the device of the present invention. FIG. 2 is a diagram showing a configuration example of an operation panel of the defect input device in the device of the present invention. FIG. 3 is a vertical sectional view showing an embodiment of the light projecting device. FIG. 4 is a principle control circuit diagram showing an example of a control sequence of the defect input device. FIG. 5 is a vertical cross-sectional view showing one structural example of the marking device. FIG. 6 is a vertical cross-sectional view showing another configuration example of the marking device. DESCRIPTION OF SYMBOLS 1; Light projecting device, 10; Mounting frame, 11; Light source, 3; Length measuring device, 4; Calculator, 5; Defect input device, 50; Operation panel, 51; Defect push button, 5
2; Defect level push button, 53; Control circuit section, 6; Marking device, 60; Compressed air supply pipe, 62, 63; Electromagnetic on-off valve, 74; Coating roller, 77; Coating stamp, A; Inspection visual field range, L; Identification light, S; strip, l; width.

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-55-80043 (JP, A) JP-A-55-117908 (JP, A)

Claims (2)

[Claims] 1. A device for visually inspecting a surface defect of a running strip (S) and confirming and storing the inspection result, the device being located near an operator's inspection visual field range (A). A plurality of identification lights which are arranged across the path line of the strip (S) and individually correspond to the respective division positions divided in the width direction of the strip (S) for easy mutual identification ( L) for projecting light, a defect position signal indicating at which divided position the surface defect of the strip (S) detected by visual inspection is divided in the width direction, and A defect input device (5) having an input portion corresponding to each of the identification lights (L) that outputs a defect level signal indicating the degree of the detected surface defect by an operator's operation and an input operation is easy.
A length measuring device (3) for measuring the running length of the strip (S), a length measuring signal from the length measuring device (3) and a defect position signal from the defect input device (5) And a defect level signal, and a computer (4) for identifying and storing the position and degree of the detected defect in the entire strip (S), and a surface defect management device for the strip. 2. The strip body according to claim 1, wherein the strip body (S) is a plurality of slit strips divided in the width direction, and the division positions are the individual slit strips. Surface defect management device.