JPH06144695A - Automatic sheet defect inspecting device - Google Patents

Abstract

PURPOSE:To improve the quality of sheet products by correcting errors in a short time by a simple device. CONSTITUTION:A detector 1a for detecting defects, a detector 1b for detecting the presence of a strip, a display arithmetic part 2 for displaying the position of the defect and the strip cutting position at an indicator 2a by a lamp, and a sheet cutting part 3 with a cutting machine and the like are provided on a frost line. The position of the indicating lamp is then corrected by the error correcting part 2e of the display arithmetic part 2 so that the sheet is made into the assigned length after cutting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet defect automatic inspection apparatus for cutting a coiled material into a sheet shape, and in particular, an inspection is performed by associating defect data therein with a designated cutting dimension length. .

[0002]

2. Description of the Related Art Conventionally, as a sheet surface inspection apparatus,
A pulse generator for data tracking and a pulse oscillator for a cutting device are provided to detect the amount of the strip fed out, and are provided with an element capable of setting a mechanical error for improving measurement accuracy and a parameter for temperature correction.

[0003]

However, in such an apparatus, it is necessary to make a correction at regular intervals, but the correction work is extremely complicated, and it is difficult due to the surrounding conditions. Is. In addition, the scratch detection tracking for cutting the coil into a sheet shape is continuous measurement, and the cutting part is a measurement for each cutting, that is, a measurement at the time of sheet cutting, and a slight error occurs in each measuring device,
This is accumulated, and there is a problem in sheet product quality due to coil flaw detection and tracking. Here, the sheet indicates a sheet after being cut by a cutting machine, and before that, it is called a strip. Also, for material defects, the front and back,
Various defects such as surface scratches and pinholes are conceivable, but hereinafter, these are collectively referred to as scratches.

[0004]

SUMMARY OF THE INVENTION The present invention was devised in view of the above-mentioned points, and an object of the present invention is to provide a sheet product of a sheet product by a simple device and capable of performing error correction in a short time. The present invention provides an automatic sheet defect inspection device that improves quality. The means is a heart defect automatic inspection device that cuts a material such as a coiled iron plate, stainless steel, paper, etc. to a specified size length, and displays a detection unit and a signal of this detection unit on the frost line. It is composed of a display calculation unit that performs calculation and a sheet cutting unit that receives a signal from this display calculation unit and cuts into sheets of a specified dimension length.

The detection unit determines the relative position between the first detector for detecting defects in the strip of material and the indicator which the strip is flowing through the frost line and which is included in the display calculation unit. It consists of two detectors. The display calculation unit includes a plurality of indicators for displaying the position of the strip defect position and the strip cutting position in the line direction of the strip, and a shift register for moving the display of this indicator in the line direction along with the movement of the strip. , A first pulse generator that transmits the movement of the strip to this shift register with a pulse signal, a setter that sets the specified dimension length of the material, a sheet cutting dimension length in the sheet cutting section, and a designation by this setting instrument An error correction unit that corrects the error with the cutting dimension length and the defect detected by the first detector can be stored, and the stored defect and the designated cutting dimension length can be displayed on the display, and the specified cutting dimension can also be displayed. The length signal is transmitted to the sheet cutting section, and further, for example, whether or not there is a defect within the specified dimension length of the strip at the final display position of the display. Betsushite consists of a calculator or the like is performed for accommodating the data to first-in first-out,
The sheet cutting unit is composed of a cutting machine or the like that cuts the strip into specified lengths.

That is, the sheet cutting section for cutting the coiled material into a sheet detects flaws, pinholes, stains, etc. of the material, and mixes defective or poor quality parts into the shipped product cut into the sheet. This is to improve product quality without doing so.The defective area detected by the surface inspection detector is tracked according to the movement of the strip, and the defective area can be visually confirmed and the sheet cutting length setting device can be used to specify the specified length. Set the height and display the display device to display the coil cut position so that it can be judged, and the calculator is equipped with a device that can judge which position of the strip is defective before being cut into a sheet. It is a thing. Further, a looper is provided immediately after the display device to buffer the difference between the feed speed (line speed) and the cutting speed immediately before the cutting device. As a result, the pulse oscillator for data tracking of the above-mentioned surface inspection detector and the pulse oscillator for the cutting device are installed on the line.

[0007]

The display calculation unit for displaying the scratch position and the sheet cutting position stores the signal inputted from the first detector for detecting the scratch by giving the pulse signal from the pulse signal device to the calculation unit. The scratch signal is moved and the scratch position is moved as the strip moves. Further, the cutting length preset by the sheet cutting length setting device is also moved by the signal from the pulse transmitter in the cutting position display. The cutting machine provided in the sheet cutting section after the looper is also set via the display device, and is cut by the signal of the pulse transmitter provided in the sheet cutting section for the set length. The cutting position is displayed as a relative position to the second detector after passing through the pulse generator. Further, in this apparatus, the display position of the cutting position is corrected by a certain amount by the input +/- signals of the correction push-button switch to correct and the position to be cut by the cutting device after the looper can be adjusted. It will be possible. An embodiment of the present invention will be described in detail below with reference to the drawings.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In FIG. 1, a detection unit 1 is provided on a frost line.
And a line display calculation unit 2 for inputting a signal from the detection unit 1 to perform display and calculation, and a sheet cutting unit 3 for receiving a signal from the display calculation unit 2 and cutting into a sheet having a specified dimension length. Has been done. The detection unit 1 determines that the strip is flowing through the frost line and the first detector 1a that detects defects in the strip of material, and the display calculation unit 2
A second detector 1b indicating a relative position to the indicator 2a included in

The display calculation unit 2 shifts the display strips of a plurality of display devices 2a for indicating the position of the strip defect position and the strip cutting position in the line direction along with the movement of the display strips 2a in the line direction. A first pulse generator 2c for transmitting the movement of the strip to the shift register 2b by a pulse signal, a setter 2d for setting a designated dimension length of the material, and a sheet cutting section 3
Error correction unit 2e that corrects an error between the sheet cutting dimension length and the designated cutting dimension length in the setting device 2d, and stores the defect detected by the first detector 1a, and the stored defect or designated cutting The dimension length is displayed on the display unit 2a, the signal of the designated cutting dimension length is transmitted to the sheet cutting unit 3, and further, for example, the lamp an at the final display position of the display unit 2a,
The sheet cutting unit 3 includes a calculator 2f that determines whether or not there is a defect within the designated dimension length of the strip in bn and stores the data in first-in first-out (not shown). This device is composed of a cutting machine 3a, a pulse generator 3b, a computing unit 3c, etc. for cutting the strip into a specified length.

Reference numeral 4 is a looper for absorbing the difference between the line speed and the cutting speed. 2g and 3d are major rolls, 3e is a feed roll, 3f and 3g are drive motors, 5 is a strip, and PB.
Is a push button switch, a1 and a2 are lamps on a plurality of flaw position display sides, and b1 and b2 are lamps on a disconnection position display side. The lamps b1 and b2 on the cutting position display side are arranged in a line in the frost line direction corresponding to the lamps a1 and a2 on the scratch position display side.

Next, the operation will be described. The strip 5 moves in the frost line direction and the major roll
When it reaches 2G, the pulse generator 2c starts operating and generates a pulse. Then, the strip 5 further moves and falls on the second detector (for example, photodetector) 1b. Here, since the distance between the major roll 2g and the detector 1b is a fixed distance, when the line speed is constant, the number of pulses generated when the strip 5 moves is naturally determined. For example, if the interval is 1000 mm and one pulse is 10 mm, the number of pulses generated during this period is 100.

Next, the flow of the strip 5 will be described before the description of the case where the strip 5 has a flaw and the case where the cutting position of the strip 5 is displayed. The strip 5 that has passed the detector 1b is the first detector 1a for detecting scratches.
Then, the lamps a1 and b1 at the tip of the display 21a move downward. Here, the position of the detector 1a is fixed between the display 2a and the detector 1b, like the detector 1b. Therefore, since the distance between them is known, the number of pulses generated during this period is N Then, the distance can be known from 1 / N. In this embodiment, the major roll 2 is in the line direction.
Although the description is made in the order of g, the detector 1b, the detector 1a, and the display 2a, there are cases where the detector 1a comes first. Strip 5 is an indicator 2a depending on the frost line speed
Move from the lamp a1 and b1 position of the toward the lamp a2 and b2,
After passing through the lamps an and bn at the final display position of the display device 2a, the cutting machine 3a is passed through the looper 4 and the major roll 3d and the feed roll 3e. The sheet-shaped product is finished by cutting at the signal.

Next, the case where the strip 5 is scratched will be described. When a flaw is detected by the detector 1a, this flaw signal is transmitted to the calculator 2f and stored therein. As for this scratch position, since the number of pulses between the detector 1b and the detector 1a is known as described above, it is possible to know what pulse the flaw is from the detector 1b or at what distance. . After that, the scratch reaches the lamp a1 at the tip of the display 2a as the strip 5 moves, and the lamp a1 is turned on by the calculator 2f. Since the strip 5 is moving at a constant line speed, the shift register 2b accordingly advances to the next ramp a2. Since there is a distance between the lamp a1 and the lamp a2, and this distance is fixed, the ratio of the distance to one pulse described above also applies here.

That is, assuming that the distance between the lamps a1 and a2 is L1 and the pulse count number is n1, (L1 / N1) is the distance per pulse, and the pulse count number from the lamp a1 is N2.
In that case, the next lamp a2 is not lit in the state of N2 <N1. However, since the strip 5 is moving in the line direction, when the first pulse n2 hits the lamp a2, it lights up and two lamps a1 and a2 light up. This lighting is when the flaw is the distance L1 + α (α is an arbitrary distance within the distance L1), and it goes without saying that only one lamp is turned on when there is a flaw in the case of L1 / N1. In this way, the lighting of the scratch display lamp is moved to the lamp an at the final display position by the shift register 2b. Of course, the number of scratches is not limited to one, and in some cases, three lamps may be lit continuously or one lamp may be lit at two distant lamps.

Next, an operation for removing the strip 5 in the portion where the flaw is detected is performed. Originally, the strip 5 is cut into a sheet having a specified length by the cutting machine 3a, and the specified length is set by the setter 2d. 2d
The setting signal from is given to the computing unit 2f, and the designated dimension length is displayed by a lamp by the computing unit 2f. In other words, the cutting position signals at the tip and end of the specified dimension length are synchronized with the pulse of the pulse generator 2c described above, and when the cutting position signal at the tip is given to the display device 2a from the calculator 2f, the lamp b1 lights up. To do. Then, the shift register 2b shifts to the next lamp b2, the lamp a1 also continues to be in a lighting state, and the lamp is extinguished when a terminal disconnection position signal is input.

After the lights are turned off, in order to distinguish the previous cutting strip 5 from the next cutting strip 5 and display the lamps, the lamps are turned off by a designated dimension length, and when the end signal of this turning off is input, the next cutting strip 5 is displayed. The cutting strip 5 lights up,
The subsequent cutting strip 5 repeats this. In this way, the respective positions of the scratch and the cutting are displayed relative to the display device 2a, and the strip 5 having the scratch is discriminated by the lamps an and bn at the final display position, for example. That is, when the tip cutting position signal of the strip 5 is given from the calculator 2a to the lamp bn at the final display position, it is searched from this position whether there is any flaw in the specified dimension length range of the strip 5 displayed on the display 2a. If there is a scratch, the fact that the strip 5 has a scratch is stored in the first-in first-out. Then, the strips 5 sequentially stored in the first-in first-out,
After passing through the cutting machine 3a, signals of a sheet with scratches and a sheet without scratches are transmitted to the sorting machine.

The sheet is manufactured by cutting the strip 5 into the designated length in this way, but there is an error between the designated length of the setter 2d and the designated length of the sheet. As described above, the error gradually increases even if they match at first. Therefore, as the error compensating means for the designated dimension length of the designated dimension length sheet, the designated dimension length is corrected while observing the display 2a. That is, measure the sheet after cutting,
When measuring how much error this length has with respect to the specified dimension length, the correction of this error is corrected by the push button PB of the error correction unit 2e to the positive or negative side of the indicator 2a at the cutting position lighting lamp. Move so that the length of the sheet after cutting matches the specified length.

In some cases, such error correction may be performed manually as described above, or the length of the sheet after cutting may be counted by a pulse oscillator and compared with a reference pulse number to determine whether the error is positive or negative. The negative deviation may be made to correspond to the forward rotation or the reverse rotation of the servo motor, and the lighting position of the lamp may be moved forward or backward by the amount of the deviation. Further, the determination as to which of the strips 5 has a flaw is made at the final lamp position of the display 2a, but the present invention is not limited to this, and any position after the flaw position is detected may be used. Further, if the scratch itself is small, if the length of the strip is large, wasting a strip of one strip will reduce the yield, and as a solution to this, the scratch b Based on the number of pulses, the setter 2d
Any means such as moving the tip position signal from this position to this position and displaying the cutting position of the designated dimension length on the lamp with this point as a reference point is included.

[0019]

As described above, according to the present invention, the relative relationship between the scratch position and the cutting position is visually confirmed by the lamp display, and when the sheet does not have the specified length, the lighting lamp of the indicator is turned on. You can correct the error while watching. This makes it possible to easily correct an error in a short time, has various advantages such as an increase in the yield of sheet products, and is extremely useful in practice.

[0020]

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 detector 1a detector 1b detector 2 display calculator 2a display 2b shift register 2c pulse oscillator 2d setting device 2e error correction unit 2f calculator 3 sheet cutting unit 3a cutting machine 4 looper 5 strip

Claims (1)

[Claims] 1. In a sheet defect automatic inspection device for cutting a material such as a coiled iron plate, stainless steel, and paper into specified lengths, a detection unit and a signal from this detection unit are input and displayed on the frost line. And a display calculation unit that performs calculation,
It is composed of a sheet cutting unit for inputting a signal from the display calculation unit and cutting it into sheets of a specified length. The detection unit includes a first detector for detecting defects in a strip of material and a strip. Is flowing through the frost line, and is composed of a second detector that indicates the relative position to the display unit included in the display calculation unit. The display calculation unit determines that the strip defect position and the strip cutting position are A plurality of indicators for indicating the position in the line direction, a shift register for moving the display of this indicator in the line direction along with the movement of the strip, and a first for transmitting the movement of the strip to this shift register by a pulse signal. 1 pulse generator, setting device for setting the specified dimension length of the material, sheet cutting dimension length in the sheet cutting part and this setting device An error correction unit that corrects the error with the constant cutting dimension length, and stores the defect detected by the first detector, displays the stored defect and the designated cutting dimension length on the display, and also specifies the designated cutting dimension. The dimension length signal is transmitted to the sheet cutting section, and further, for example, at the final display position of the display, it is determined whether or not there is a defect within the designated dimension length of the strip, and the data is output to the first-in-first-out. An automatic sheet defect inspection system that consists of a computing unit that stores and the like, and a sheet cutting unit that consists of a cutting machine that cuts strips into specified lengths.