KR101193695B1 - Apparatus for inspecting upper and lower surface of hot rolled steel plate and the method thereof - Google Patents
Apparatus for inspecting upper and lower surface of hot rolled steel plate and the method thereof Download PDFInfo
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- KR101193695B1 KR101193695B1 KR20100073066A KR20100073066A KR101193695B1 KR 101193695 B1 KR101193695 B1 KR 101193695B1 KR 20100073066 A KR20100073066 A KR 20100073066A KR 20100073066 A KR20100073066 A KR 20100073066A KR 101193695 B1 KR101193695 B1 KR 101193695B1
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Abstract
The present invention relates to a surface inspection device and inspection method for detecting the upper and lower surface defects of the hot rolled steel sheet, the surface detection unit for detecting the upper and lower surfaces of the rolled steel sheet to obtain surface data, and receives the surface data obtained from the surface detection unit The surface defect calculation control unit extracts the defect data by comparing and determining the surface defects, and receives the defect data extracted from the surface defect calculation control unit, and includes a surface defect marking unit for marking the defect site on the rolled steel sheet. In addition, the integrated inspection of defects on the upper and lower surfaces of the hot rolled steel sheet and the location of the defects can be integrated, and this information can be integrated and managed to improve inspection accuracy for product defects and consequently to improve product reliability. Can be.
Description
The present invention relates to a surface inspection device and inspection method for detecting the upper and lower surface defects of the hot rolled steel sheet, in order to detect the surface defects before the warehouse wearing of the rolled steel sheet, the defect information on the upper and lower surfaces of the hot rolled steel sheet being transported The surface inspection apparatus for detecting surface defects of the upper and lower parts of the hot rolled steel sheet, which can separately manage the surface quality of the hot rolled steel sheet by performing separate marking on the defective portions or by transmitting inspection data on the defective portions to the integrated management server. And an inspection method.
Hot rolled steel sheet, especially thick plate, is subjected to finishing rolling in the thick plate process to the target dimensions according to the process, and after being hot-passed through the cooling phase and commercialized into a thick plate product of a certain thickness.
At this time, the internal quality of the thick plate is evaluated by an ultrasonic flaw detector called UST (ultrasonic transducer), and the surface quality of the thick plate is inspected by the inspectors before it enters the warehouse.
However, the surface defect inspection of the thick plate tends to depend entirely on the manual work of the inspectors, so that in spite of the surface defects sometimes, the defects may not be detected.
Therefore, in order to improve the quality of the hot rolled steel sheet product, as well as to ensure the reliability of the product, an integrated management method for the surface quality of the hot rolled steel sheet product is required.
It is an object of the present invention to automate the inspection of upper and lower defects of a rolled steel sheet, to detect surface defects of products more quickly and accurately, and to detect surface defects of upper and lower surfaces of hot rolled steel sheets which can collectively manage information on the detected surface defects. It is to provide a surface inspection apparatus for.
In addition, another object of the present invention is to develop a device capable of integrally inspecting the upper and lower defects of the rolled steel sheet being transported, while eliminating the application of expensive inspection equipment such as turnover equipment when inspecting the defects of the rolled steel sheet. An object of the present invention is to provide a surface inspection apparatus for detecting surface defects of upper and lower surfaces of a hot rolled steel sheet having improved convenience and accuracy.
In addition, another object of the present invention is to automate the inspection of the upper and lower defects of the rolled steel sheet, to detect the surface defects of the product more quickly and accurately, and at the same time to manage the information on the detected surface defects in the upper and lower parts The present invention provides a surface inspection method for detecting surface defects.
According to the spirit of the present invention, the surface detection unit for detecting the upper and lower surfaces of the rolled steel sheet to obtain surface data; A surface defect calculation control unit which receives the surface data acquired by the surface detection unit, and compares and determines whether there is a surface defect and extracts defect data; It provides a surface inspection apparatus for detecting the surface defects of the upper and lower portions of the hot-rolled steel sheet, including; a surface defect marking unit receiving the defect data extracted from the surface defect calculation control unit, and marking the defect site on the rolled steel sheet.
In this case, the surface detection unit is preferably a non-contact sensor provided respectively on the upper side and the lower side of the rolled steel sheet being transferred.
Such a non-contact sensor includes a laser beam scanning unit which scans light onto upper and lower surfaces of the rolled steel sheet, respectively; And a laser vision input unit configured to receive the reflected light of the light scanned by the optical scanning unit and obtain surface data of the hot rolled steel sheet.
In addition, such a non-contact sensor, an image sensing device for acquiring the surface data of the rolled steel sheet by taking an image image in real time on the upper and lower surfaces of the hot-rolled steel sheet may be used.
In this case, the image sensing device may be a CCD (charged coupled device) sensor or a complementary metal oxide semiconductor (CMOS) sensor.
The surface defect calculation control unit may include: a data input unit configured to receive surface data obtained from the surface detection unit; And a data processor which compares and determines a difference in surface data according to the presence or absence of surface defects by using the input surface data, and extracts defect data corresponding to the surface defect present region.
The surface defect calculation controller may further include a data recorder configured to record and store defect data extracted by the data processor in real time or at a predetermined time.
The surface defect calculation controller may further include a marking controller for instructing the marking of the surface defect marking unit to be executed based on the defect data extracted by the data processor.
The surface defect marking portion is provided on the upper side of the rolled steel sheet being transferred, and is conveyed from side to side with respect to the width of the rolled steel sheet, and the marking is performed on the surface of the rolled steel sheet according to the defect data command.
The surface defect marking unit, the paint storage unit is provided for storing the coating material for marking; A paint withdrawal control unit for controlling the withdrawal of the paint for marking from the paint storage unit; And a paint spray nozzle part which receives the drawn marking paint and sprays it into a defect present region of the rolled steel sheet.
Here, the paint withdrawal control unit, the paint withdrawal pipe connected to the paint storage unit to form a withdrawal pipe for marking paint; And a valve formed in the paint drawing pipe to control the opening and closing of the paint for marking.
In this case, a solenoid valve capable of drawing opening, closing, and controlling the flow rate of the paint for marking may be used.
The defect data of the rolled steel sheet extracted by the surface defect calculation controller may be transmitted to at least one monitoring means of an integrated management server, a PC, and a personal terminal through a wired or wireless interface.
On the other hand, according to another aspect of the present invention, (a) obtaining the surface data for the upper and lower surfaces for the rolled steel sheet; (b) receiving the obtained surface data and comparing the difference in surface data according to the presence or absence of surface defects of the rolled steel sheet; (c) extracting defect data corresponding to the surface defect present region on the rolled steel sheet; And (d) marking the surface defect present region on the basis of the extracted defect data. The surface inspection method for detecting the upper and lower surface defects of the hot rolled steel sheet may be provided.
In this case, after the step (c), (c-1) the extracted defect data is recorded and stored in a separate database; may further include.
In addition, after the step (c), (c-2) the extracted defect data is transmitted to the integrated management server in real time through a wired interface; may further include.
And (c-3) after the step (c), the extracted defect data is transmitted and monitored through a wired / wireless interface in real time or through a PC or a personal terminal whenever a user request is received. Can be.
According to the present invention, the surface inspection apparatus and the inspection method for detecting the upper and lower surface defects of the hot-rolled steel sheet, the defects on the upper and lower surfaces of the hot-rolled steel sheet and the location of the defects are integrated and the information on the detected defects is marked in real time. In addition, by managing such information integrally, it is possible to reduce the product defect rate, and through the increase in the reliability of the product quality, there is an advantageous technical effect that can improve the product competitiveness.
In addition, according to the surface inspection apparatus and inspection method for detecting the upper and lower surface defects of the hot-rolled steel sheet according to the present invention, in order to more precisely inspect the upper and lower defects of the hot-rolled steel sheet being transported, by providing each non-contact sensing portion on the upper and lower sides of the hot-rolled steel sheet, There is an advantageous technical effect that can improve inspection convenience and inspection accuracy.
Further, according to the present invention, the surface inspection apparatus and inspection method for detecting the upper and lower surface defects of the hot-rolled steel sheet, not only to obtain an image of the defect on the surface of the hot-rolled steel sheet, but also to manage the obtained defect information integrally. Accordingly, there is an advantageous technical effect that can further improve product defect rate process control.
1 is a view showing a surface inspection equipment having a sensing unit for inspecting only the upper surface for detecting the hot-rolled steel sheet surface defects,
2 is a view schematically illustrating a surface inspection apparatus for detecting upper and lower surface defects of a hot rolled steel sheet according to one embodiment of the present invention;
FIG. 3 is a view illustrating a marking of a defect present region using a surface inspection apparatus for detecting upper and lower surface defects of a hot rolled steel sheet according to one embodiment of the present invention; FIG.
4 is a flowchart illustrating a surface inspection method for detecting upper and lower surface defects of a hot rolled steel sheet according to an embodiment of the present invention.
Hereinafter, a surface inspection apparatus for detecting top and bottom surface defects of a hot rolled steel sheet according to a preferred embodiment of the present invention will be described.
Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings.
The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.
.
1 is a view showing a surface inspection equipment having a sensing unit for inspecting only the upper surface for detecting the hot-rolled steel sheet surface defects.
Before describing the surface inspection apparatus for detecting the top and bottom surface defects of the hot rolled steel sheet in detail, the surface inspection equipment including only a general configuration will be briefly introduced.
The surface inspection apparatus of the hot rolled steel sheet which is generally introduced and used is limited only to the function of detecting the top surface defect of the hot rolled steel sheet S being transported by the lower roller table R. For this purpose, the hot rolled steel sheet S The
Types of the
In this case, it may be convenient for the inspector to inspect the surface quality of the hot rolled steel sheet in real time, but it is difficult to integrate the information and the missed surface defect of the hot rolled steel sheet may be frequently caused by the error of the inspector. .
In this case, in order to inspect the lower surface defects of the hot rolled steel sheet, a separate device (eg, turn over equipment) is required, and in addition, inconvenience of inspection may be inferior.
2 is a view schematically illustrating a surface inspection apparatus for detecting upper and lower surface defects of a hot rolled steel sheet according to an embodiment of the present invention.
2 clearly shows only the main features in order to conceptually clearly understand the present invention, and as a result, various modifications of the drawings are expected, and the scope of the present invention needs to be limited by the specific shapes shown in the drawings. There is no.
2, the surface inspection apparatus for detecting the upper and lower surface defects of the hot rolled steel sheet according to an embodiment of the present invention, the
Hot-rolled steel sheet (S), in particular, the thick plate is subjected to finishing rolling in the thick plate process to the target dimensions according to the process, and after the hot correction passes through the cooling phase is produced into a thick plate product of a certain thickness.
At this time, the internal quality of the thick plate can be evaluated by an ultrasonic flaw detector called UST (ultrasonic transducer), in order to more effectively perform inspection of the surface defects of the thick plate, the present invention was devised.
As mentioned above, the
The
The
Here, the non-contact sensor is a sensing means as opposed to a contact sensor that makes a separate probe contact the surface of the rolled steel sheet S and mechanically measures surface defects. Can be.
As a specific example, the non-contact sensor may be a laser vision system (LVS) for quick image processing and an image sensing device for monitoring as well as accurate image processing.
If the non-contact sensor of the present invention uses a laser vision, although not separately illustrated, a laser beam scanning unit (not shown) for scanning light onto upper and lower surfaces of the rolled steel sheet S and the laser beam scanning unit, respectively. A laser vision device may be configured to include a laser light input unit configured to receive the reflected light of the scanned light to obtain surface data of the hot rolled steel sheet.
On the contrary, if the non-contact sensor of the present invention uses an image sensing device, a CCD capable of acquiring surface data of the rolled steel sheet by capturing an image image in real time on the upper and lower surfaces of the hot rolled steel sheet S, although not separately illustrated. A charged coupled device sensor or a complementary metal oxide semiconductor (CMOS) sensor may be used.
Here, the CCD sensor has two functions such as storage by charge accumulation and transfer by transfer of charge, which enables highly integrated image processing, which is currently used as a sensor for various video cameras as well as digital cameras. .
The CMOS sensor is a sensor for storing image data through an A / D converter process in which one light receiving element has one transistor, converts photons received by each light receiving element into electrons, and then converts the photons into voltage. It is a sensor that has lower power consumption and price competitiveness compared to CCD method. However, there is a possibility that a lot of noise is generated compared to the above-described CCD sensor, there is a disadvantage that the sensitivity is low, and the dynamic range is narrow, it is good to select and apply appropriately according to the form of the corresponding embodiment.
That is, since the
And, as shown in FIG. 2, the
Therefore, in order to detect the upper and lower surfaces of the hot rolled steel sheet S in real time, the arrangement of FIG. 2 may be preferable. In addition, the upper and lower surfaces of the hot rolled steel sheet S may be detected at a predetermined time difference. In order to achieve this, the arrangement may be made in a predetermined spaced interval.
Next, the defect
The
In addition, the defect
The defect
The
The
That is, if the surface data without a defect is X i , the surface data of the region where the defect is present is determined as X d , and the presence or absence of a defect on the rolled steel sheet S is extracted through the data difference between each other. Extract defect data.
The
The
And the defect
The defect
In addition, as can be confirmed through FIG. 2, in addition to the
In this way, the supervisor or inspector can quickly and accurately monitor the surface defects of the rolled steel sheet S anytime, anywhere, thereby improving the convenience of inspection for the surface defects of the rolled steel sheet S, and further, the product defect rate. By lowering the product reliability can be promoted.
Next, the surface
The surface
As can be seen through Figure 2, the surface
To this end, the surface
The surface
Here, the marking paint (P) is a solution that can be sprayed on the defect present region of the rolled steel sheet (S) to display the meaning that there is a defect, and specific examples thereof include ink, paint, and the like. have.
The
And the paint
According to the instruction of the marking
At this time, it is preferable to use a solenoid valve that can adjust the flow rate of the marking paint P as well as withdrawal opening and closing of the marking paint P as the
And the paint spray nozzle unit 138 sprays the marking paint (P) supplied in accordance with the control of the paint
At this time, the paint spray nozzle unit 138 is preferably formed in a form that can be transported left, right along the width direction of the rolled steel sheet (S), which implements an effective marking for the entire width direction of the rolled steel sheet (S) To do this.
FIG. 3 is a diagram illustrating a marking of a defect present region using a surface inspection apparatus for detecting upper and lower surface defects of a hot rolled steel sheet according to an embodiment of the present disclosure.
As shown in FIG. 3, during the transfer of the rolled steel sheet S having defects on the upper and lower surfaces, surface data of the
The surface
Next, the surface inspection method for detecting the top and bottom surface defects of the hot rolled steel sheet according to a preferred embodiment of the present invention.
4 is a flowchart illustrating a surface inspection method for detecting upper and lower surface defects of a hot rolled steel sheet according to an embodiment of the present invention.
First, surface data of upper and lower surfaces of a rolled steel sheet is obtained (ST100).
Hot-rolled steel sheet (S), in particular, the thick plate is subjected to finishing rolling in the thick plate process to the target dimensions according to the process, and after the hot correction passes through the cooling phase is produced into a thick plate product of a certain thickness.
At this time, the internal quality of the thick plate can be evaluated by an ultrasonic flaw detector called UST (ultrasonic transducer), the surface defects of the thick plate can be detected through the surface data acquisition in this step (ST100).
Next, the obtained surface data is input to compare and determine a difference in surface data according to the presence or absence of a surface defect of the rolled steel sheet (ST200).
Next, defect data corresponding to the surface defect present region on the rolled steel sheet is extracted (ST300).
In this case, the extracted defect data refers to information on the surface area where the defect exists, including both the upper surface and the lower surface of the rolled steel sheet.
Defect data extracted in this step (ST300), may be stored and stored in a separate database, and may be transmitted to the integrated management server in real time through a wired interface, real-time or user requests through a wired or wireless interface Whenever it is available, it can be transmitted and monitored through a PC or personal terminal (eg PDA, mobile phone, smartphone). Thereby, the supervision and management of the surface defect of a rolled sheet steel can be made efficiently.
Next, marking is performed on the surface defect present region based on the extracted defect data (ST400).
In performing this marking, in order to more effectively manage the surface defects, a determination is made as to where the defects exist in the upper and lower surfaces of the rolled steel sheet, and the defects exist only on the upper surface, the defects exist only on the lower surface, and the upper and lower parts. It would be desirable to perform different types of marking separately distinguishing the presence of defects on both surfaces.
Further, at the end of this step ST400, the surface defect inspection for the rolled steel sheet is not terminated, but for all the lengths of the rolled steel sheet being transferred, all the above steps ST100, ST200, ST300, ST400 are repeatedly Can be implemented.
The surface inspection apparatus and the inspection method for detecting the upper and lower surface defects of the hot rolled steel sheet according to the present invention have been described above.
It is to be understood that the above-described embodiments are illustrative in all aspects and should not be construed as limiting, the scope of the invention being indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.
S: rolled steel sheet
R: roller table
P: Marking Paint
110, 110 ′: surface detector
120: surface defect calculation control
130: surface defect marking portion
140: interface
150: integrated management server
Claims (17)
The surface defect marking portion is provided on the upper side of the rolled steel sheet being transferred, and is moved left and right with respect to the width of the rolled steel sheet, and performs marking on the surface of the rolled steel sheet according to the defect data command extracted from the surface defect calculation control unit. Surface inspection apparatus for detecting the upper and lower surface defects of the hot rolled steel sheet.
The surface detector,
Surface inspection apparatus for detecting the upper and lower surface defects of the hot-rolled steel sheet, characterized in that the non-contact sensor provided on the upper side and the lower side of the rolled steel sheet being transferred.
The non-contact sensor,
A laser beam scanning unit scanning light onto upper and lower surfaces of the rolled steel sheet; And
Surface inspection for detecting the upper and lower surface defects of the hot-rolled steel sheet, characterized in that the laser vision device comprising a; laser light input unit for receiving the reflected light of the light scanned by the laser beam scanning unit to obtain the surface data of the hot-rolled steel sheet Device.
The non-contact sensor,
Surface inspection apparatus for detecting the upper and lower surface defects of the hot-rolled steel sheet, characterized in that the image sensing device for obtaining the surface data of the rolled steel sheet by taking an image image in real time on the upper and lower surfaces of the hot-rolled steel sheet.
The image sensing device,
Surface inspection apparatus for detecting the upper and lower surface defects of the hot rolled steel sheet, characterized in that the CCD (charged coupled device) sensor or a complementary metal oxide semiconductor (CMOS) sensor.
The surface defect calculation control unit,
A data input unit configured to receive surface data acquired by the surface detector; And
And detecting the difference in the surface data according to the presence or absence of the surface defect by using the input surface data, and extracting the defect data corresponding to the region of the surface defect. Surface inspection device.
The surface defect calculation control unit,
And a data recording unit for recording and storing the defect data extracted by the data processing unit in real time or at a predetermined time. The surface inspection apparatus for detecting surface defects of the upper and lower surfaces of the hot rolled steel sheet.
The surface defect calculation control unit,
And a marking control unit for instructing marking on the surface defect marking unit based on the defect data extracted from the data processing unit.
The surface defect marking portion,
A paint storage unit provided to store the paint for marking;
A paint withdrawal control unit for controlling the withdrawal of the paint for marking from the paint storage unit; And
And a paint spray nozzle unit receiving the drawn marking paint and spraying the sprayed paint into a defect present region of the rolled steel sheet.
The paint withdrawal control unit,
A paint withdrawal pipe connected to the paint storage to form a withdrawal pipe for marking paint; And
Surface inspection apparatus for detecting the surface defects of the upper and lower surfaces of the hot-rolled steel sheet, characterized in that it comprises a;
The valve,
Surface inspection apparatus for detecting the surface defects of the upper and lower parts of the hot-rolled steel sheet, characterized in that the solenoid valve capable of withdrawing and opening and closing the marking paint and flow control.
The defect data of the rolled steel sheet extracted by the surface defect calculation control unit is transmitted to at least one monitoring means of an integrated management server, a PC, and a personal terminal through a wired or wireless interface. Surface inspection device.
After the step (c), (c-1) recording and storing the extracted defect data in a separate database; surface inspection method for detecting the upper and lower surface defects of the hot-rolled steel sheet further comprising.
After step (c),
(c-2) the extracted defect data is transmitted to the integrated management server in real time through a wired interface; surface inspection method for detecting the upper and lower surface defects of the hot-rolled steel sheet.
After step (c),
(c-3) the extracted defect data is transmitted and monitored through a PC or a personal terminal through a wired / wireless interface in real time or whenever there is a user request; hot-rolled steel sheet upper and lower surface defects further comprising a Surface inspection method for detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20100073066A KR101193695B1 (en) | 2010-07-28 | 2010-07-28 | Apparatus for inspecting upper and lower surface of hot rolled steel plate and the method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| KR20100073066A KR101193695B1 (en) | 2010-07-28 | 2010-07-28 | Apparatus for inspecting upper and lower surface of hot rolled steel plate and the method thereof |
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| KR20120011944A KR20120011944A (en) | 2012-02-09 |
| KR101193695B1 true KR101193695B1 (en) | 2012-10-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018132258A1 (en) * | 2017-01-10 | 2018-07-19 | Sunspring America, Inc. | Technologies for identifying defects |
| KR101880626B1 (en) | 2017-03-17 | 2018-07-20 | 주식회사 포스코 | Slab support structure |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316931B (en) * | 2013-05-27 | 2016-03-02 | 首钢总公司 | A kind of method of adding up strip surface defect density |
| CN106475425B (en) * | 2015-08-25 | 2019-05-28 | 宝山钢铁股份有限公司 | A kind of online surface quality of strip checks equipment and inspection method |
| CN105301005B (en) * | 2015-11-11 | 2018-12-14 | 首钢集团有限公司 | A method of prediction hot rolled coil surface defect is in slab thickness direction position |
-
2010
- 2010-07-28 KR KR20100073066A patent/KR101193695B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018132258A1 (en) * | 2017-01-10 | 2018-07-19 | Sunspring America, Inc. | Technologies for identifying defects |
| US10768120B2 (en) | 2017-01-10 | 2020-09-08 | Sunspring America, Inc. | Technologies for identifying defects |
| KR101880626B1 (en) | 2017-03-17 | 2018-07-20 | 주식회사 포스코 | Slab support structure |
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| Publication number | Publication date |
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| KR20120011944A (en) | 2012-02-09 |
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