JPH04305316A - Method for processing quality control data for strip - Google Patents

Abstract

PURPOSE:To surely transmit the quality control information of plural processes by continuously writing the quality control data of the strip in the longitudinal direction of the strip, and reading up the above data by developing it reversely at the next process. CONSTITUTION:On the 1st process A, the strip 2 is irradiated with a laser projecting unit 1 by running the laser spot in the lateral direction, and this reflecting light is received with an optical receiver 3. A flow detecting device 5 detects the flaw with this light, a trucking device 9 calculates the feeding quantity of the strip 2. The inspector judges visually the state of the flaw with the display 4, records the judged result with the key board 10. While these data are recorded synthetically to the concentrated control board 11, it is wound to the coil C. The data of concentrated control board 11 is transmitted to the concentrated control board 21. On the next process B, the strip wound to the coil C is uncoiled, the inspection of flaw is executed by referring the data of the data of the concentrated control board 21. Because the information is unified and managed, so the standard of the quality evaluation is made consistent, the oversight or the repetition of working is eliminated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing quality control data when the same strip material is processed while being wound into coils in multiple steps.

0002

[Prior Art] Cold rolled steel strip is subjected to a prescribed heat treatment by passing through a continuous annealing furnace.
At the exit of the line, it is wound up one after another to form a coil. This coil is then uncoiled again in another process in order to undergo surface treatment such as plating depending on its use.

On the other hand, strip materials are inspected for defects over almost the entire surface at each step in order to guarantee their quality, but in order to inspect the surface of the strip, laser light is applied to the surface of the strip running in the line. A system has already been established in which the reflected waves are scanned in the width direction by a photoelectric conversion element such as a CCD element, and this reflected wave is converted into voltage intensity using a photoelectric conversion element such as a CCD element. Based on this signal data, the presence or absence of flaws is determined and a warning is issued to the inspector. (See Japanese Unexamined Patent Publication No. 63-62825, etc.).

[0004] By the way, since sufficient quality control cannot be achieved only with quality checks using optical inspection equipment as described above, conventionally, inspectors were assigned to each process, and each inspected from a different perspective. It was customary for the final judgment to be made. This resulted in inconsistent quality evaluations between each process, and in some cases, duplication of work due to incomplete communication of information.

[0005]

[Problems to be Solved by the Invention] The present invention has been devised to solve the above-mentioned disadvantages of the prior art.
The main purpose is to provide a method for processing quality control data that can unify quality control standards in a series of processes and accurately communicate information related to quality control between multiple processes.

[0006]

[Means for Solving the Problems] According to the present invention, the first step of sequentially winding a strip material that has undergone a certain predetermined treatment process until it is in a coil state; A method for processing quality control data of a strip material, which includes a second step of stretching the coil that has gone through the step again and subjecting it to another process, This is achieved by sequentially writing in the horizontal direction, and in response to the stretching of the strip material in the second step, the flaw data written in the first step is developed and read out in the reverse order of writing. .

[0007]

[Operation] According to such a configuration, various information regarding defects in a series of processes can be managed in a unified manner. Therefore, quality evaluation standards between processes are consistent, and problems such as defects being overlooked or inspection work that has already been performed in a previous process being repeated in the next process can be eliminated.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below based on specific embodiments shown in the accompanying drawings.

FIG. 1 shows the overall configuration of the present invention. This system aims to unify quality control between a first process A in which, for example, a cold-rolled steel plate strip is continuously annealed, and a second process B in which the steel plate that has undergone this process is, for example, hot-dip galvanized. It is for. In the first step A, a laser spot is swept in the width direction from a He-Ne laser projector 1 toward the surface of the strip 2, and the reflected light is received by a light receiver 3 consisting of a photomultiplier or the like. A flaw detection device 5 is configured to detect flaws by comparing the obtained voltage waveform with a predetermined flaw determination value, and to display an image of the flawed portion on the screen of a CRT display 4. The plate speed was obtained by counting the number of rotations of the conveying hearth roll 6 with a rotation number detector 7 consisting of a pulse transmitter, and the plate speed was obtained by detecting the punch holes provided in the welded parts of dissimilar materials with a phototube 8. A tracking device 9 that calculates the feed amount of the strip 2 from the reference position of each coil, a keyboard 10 for the inspector to input visual data, flaw detection data from the flaw detection device 5, and strip data from the tracking device 9. Aggregation and storage of feed amount data, visual data, etc.
Also provided is a centralized control panel 11 that performs integrated control of the entire facility.

[0010] In the second step B, a tracking device 19 consisting of a rotation speed detector 17 of the hearth roll 16 and a punch hole detector 18 is used to notify the approach of the flawed part to the inspection stage by an audio signal. a display 14 that displays the movement status of the flaw position in real time, a keyboard 20 that inputs visual data, and a first process written on a storage medium 23 such as a magnetic drum or magnetic disk. A centralized control panel 21 is provided for reading out data of A and performing integrated control of each device.

First, in the first step A, the voltage waveform or differential waveform obtained from the voltage intensity signal emitted by the photodetector 3 is compared with a predetermined tolerance value, and if a signal exceeding the tolerance value is input, is sequentially stored in the digital memory built into the flaw detection device 5, and a still image of the flawed area is displayed on a CRT.
It is displayed on the screen of the display 5. At the same time, this flaw occurrence signal is output to the central control panel 11.

On the other hand, the operator visually judges the image of the defective area on the CRT display 5, and sequentially inputs supplementary information from the keyboard 10 as necessary. Of course, this information is stored in the storage medium 23 in correspondence with the position information of the strip 2 tracked by the tracking device 9, or
Alternatively, it is transferred to the central control panel 21 of the second process B via an optical cable or the like.

[0013] After the annealing process has been completed in this way, the strip material wound around the coil C is sent to the second process B and uncoiled again. At that time, the second step B
A data reading section built into the central control panel 21 reversely develops the serial data sequentially written in the first step A, and moves the defective part in response to the tracking signal emitted by the tracking device 19. Monitor. When a flawed part approaches the inspection stage, a sound signal is emitted from the sounding device 22, and information about the flaw is displayed on the CRT display 14. Furthermore, the strip conveyance speed is controlled to be decelerated as necessary to facilitate the verification work. Further, the examiner inputs necessary supplementary data from the keyboard 20 after confirming the defective part.

[0014] The flaw data is updated as necessary, and flaws that are finally determined to be harmful are input into a separate storage device, printed out on an inspection report, or saved as verification data.

[0015]

As described above, according to the present invention, quality display data such as flaw detection data is stored together with longitudinal position tracking data on the strip, and in the next process, the serial data of the previous process is reversely developed. Since data is referenced by performing the following steps, it is possible to ensure correspondence between the position of the strip wound around the coil and the data. Therefore, it is possible to centralize and manage various information related to quality control in a series of strip processing processes, so that quality evaluation standards between each process are consistent, and defects are not overlooked or defects that have already been carried out in the previous process. This eliminates the inconvenience of having to repeat the inspection work in the next process.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of a quality control data processing system based on the present invention.

[Explanation of symbols]

A First step B Second process C Coil 1 Floodlight 2 Strip 3 Photo receiver 4 CRT display 5 Flaw detection device 6 Hearth roll 7 Rotation speed detector 8 Phototube 9 Tracking device 10 Keyboard 11 Centralized control panel 14 CRT display 16 Hearth roll 17 Rotation speed detector 18 Punch hole detector 19 Tracking device 20 Keyboard 21 Centralized control panel 22　Sound generator 23 Storage medium

Claims (1)

[Claims] Claim 1: A first process in which a strip material that has undergone a certain predetermined process is sequentially wound up to form a coil, and a second process in which the coil that has undergone the first process is stretched again and subjected to another process. 2. A method for processing quality control data of a strip material, comprising: writing the quality control data of the strip material in the first step continuously and sequentially in the length direction of the strip material; A method for processing quality control data of a strip material, characterized in that the data written in the first step is reversely expanded and read out in the writing order in response to the stretching of the strip material in the step.