CN113231480A - Method for rapidly detecting black wire and black line on surface of aluminum coil on line - Google Patents
Method for rapidly detecting black wire and black line on surface of aluminum coil on line Download PDFInfo
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- CN113231480A CN113231480A CN202110628776.8A CN202110628776A CN113231480A CN 113231480 A CN113231480 A CN 113231480A CN 202110628776 A CN202110628776 A CN 202110628776A CN 113231480 A CN113231480 A CN 113231480A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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Abstract
The invention belongs to the field of aluminum coil surface quality inspection, and particularly discloses a method for rapidly detecting black wires on the surface of an aluminum coil on line, which comprises the following steps: in the process of uncoiling an aluminum coil, a person holds an inclined white reflector at the uncoiling side of the aluminum coil close to the detected position of the aluminum coil by hand, then a hand-held light source is applied between the white reflector and the aluminum coil, the light source is projected to the white reflector, the white reflector forms an enhanced white image on the surface of the aluminum coil under the action of the light source, and the person directly observes a white phase on the surface of the aluminum coil by naked eyes to judge whether a black wire black line exists on the surface of the aluminum coil under the contrast of the white image; the invention realizes the quick inspection of the black wire and black line on the surface of the aluminum coil by the principle that the black wire and black line are easier to identify by the white image formed on the surface of the aluminum coil by the white reflector; the invention has the advantages of simple operation mode and low economic cost investment.
Description
Technical Field
The invention belongs to the field of aluminum coil surface quality inspection, and particularly relates to a method for rapidly detecting black wires on the surface of an aluminum coil on line.
Background
The black wire black line on the surface of the aluminum strip refers to a fine black dot-shaped or strip-shaped defect which is shown on the surface after hot rolling or cast rolling, 1 or more black (dark) thin lines with the width of about 0.2mm to 1.0mm, different depths, different lengths, intermittence and parallel to the rolling direction are shown on the surface of the aluminum strip, and the defect can be seen by naked eyes when the defect is static but is difficult to be found during uncoiling operation.
The surface quality and the mechanical property of the aluminum strip are greatly reduced due to the defects of black wires, black lines and the like on the surface of the aluminum strip, the subsequent production and sale are not facilitated, and the service life and the surface grade of the aluminum strip are reduced due to the black wires and the black lines. For example, if the surface of the thin aluminum foil is provided with black threads and black lines, micropores can be formed by the defects in the later period, so that the number of the needle holes of the aluminum foil exceeds the standard; and as the cosmetic cover material with higher requirements and common high-surface 3C materials, the black lines of the black silk are exposed after oxidation and cannot be used clearly. The materials with high surface requirements do not allow the surface to have black silk and black line defects.
The generation of black wire and black line defects on the surface of the aluminum alloy is manifold, such as small black strips formed when the hot rolling process is not lubricated and rolled cleanly; the guide path is not clean or the external dirt falls on the surface of the strip material and is rolled; cold rolling oil is not clean or an aluminum plate is scratched and the like.
In the aluminum processing industry, the surface requirements of products are often divided into different grades, the surface requirements of blanks of high-surface materials with higher surface requirements are correspondingly higher, so that the blanks are required to be checked when the fed blanks are subjected to cold rolling and cogging, once surface defects such as black wires and black lines which affect later use are found, degradation and material modification are carried out in time, and waste and passivity caused by finding in later processes are avoided.
At present, the method for detecting the black wire and the black line on the surface of the aluminum strip mostly needs to ensure that the aluminum strip is in a static state or a low-speed uncoiling state, and the black wire and the black line on the surface of the aluminum strip cannot be effectively found when the aluminum strip is uncoiled and rapidly runs, so that the use of the aluminum strip is seriously influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for rapidly detecting the black wire and the black line on the surface of an aluminum coil on line, which solves the problems in the background technology.
A method for rapidly detecting black wires on the surface of an aluminum coil on line comprises the following steps: in the process of uncoiling an aluminum coil, a person holds an inclined white reflector at the uncoiling side of the aluminum coil close to the detected position of the aluminum coil, then a handheld light source is applied between the white reflector and the aluminum coil, the light source is projected to the white reflector, the white reflector forms an enhanced white image on the surface of the aluminum coil under the action of the light source, and the person directly observes the white phase on the surface of the aluminum coil by naked eyes to judge whether black threads exist on the surface of the aluminum coil or not under the contrast of the white image.
Further, the white reflecting plate faces upwards or downwards towards one side of the aluminum coil.
Further, the white reflecting plate is white paper or a white board.
Further, the light source is located on the front side of the white reflector or on the upper, lower, left or right side of the front side of the white reflector, and one side of the white reflector facing the aluminum coil is the front side.
Compared with the prior art, the invention has the following beneficial effects:
in the invention, because the surface of the aluminum strip has certain glossiness and is equivalent to a mirror surface, the white reflector can form a white image on the surface of the aluminum strip, and the white reflector forms an enhanced white image on the surface of the aluminum strip under the action of light source irradiation on the white reflector, if the surface of the aluminum strip has black threads and black lines, the aluminum strip can be effectively and timely detected; the method for detecting the black wire and the black line on the surface of the aluminum strip, provided by the invention, has the advantages of simple operation mode, less types of required detection equipment, no need of reducing the uncoiling speed and effective economic cost saving.
Drawings
FIG. 1 is a schematic diagram of the detection of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
A method for rapidly detecting black wires on the surface of an aluminum coil on line comprises the following steps: in the process of uncoiling an aluminum coil, a person holds an inclined white reflector at the uncoiling side of the aluminum coil close to the detected position of the aluminum coil, then a handheld light source is applied between the white reflector and the aluminum coil, the light source is projected to the white reflector, the white reflector forms an enhanced white image on the surface of the aluminum coil under the action of the light source, and the person directly observes the white phase on the surface of the aluminum coil by naked eyes to judge whether black threads exist on the surface of the aluminum coil or not under the contrast of the white image.
In this embodiment, the white reflector is inclined upward or downward toward one side of the aluminum roll.
In this embodiment, the white reflecting plate is a white paper or a white board.
In this embodiment, the light source is located on the front side of the white reflector or on the upper, lower, left, or right side of the front side of the white reflector, and a side of the white reflector facing the aluminum roll is the front side.
The working principle of the invention is as follows:
the surface of the aluminum strip is a smooth surface, the aluminum strip has a good mirror effect, the white reflecting plate is arranged on the uncoiling side of the aluminum strip in an inclined angle, then a light source is applied to the front surface of the white reflecting plate or the position of the front surface of the white reflecting plate which is upward, downward, leftward or rightward, under the enhancement action of the light source, an enhanced white image is formed on the surface of the aluminum roll, and if the surface of the aluminum roll has black threads and black lines, the black threads and the black lines are under the contrast of the white image, so that the aluminum roll can be more easily identified and detected.
In the specific implementation of the invention, as shown in fig. 1, a person holds a white reflector 1, the white reflector 1 is vertical to the ground, a light source 2 is arranged at a lower position of the front surface of the white reflector 1, under the enhancement action of the light source 2, the white reflector 1 forms a white image 3 on the surface of an aluminum strip, and the person stands at one side of an aluminum coil to observe the white image 3; in this embodiment, the width of the white reflector 1 may be the same as the width of the aluminum roll, and certainly, in order to facilitate the operation of a person, the size of the white reflector 1 may be the same as that of the a4 paper, and during the detection, the person only needs to hold the white reflector 1 to move back and forth along the width direction of the aluminum roll to observe the black wire and black line condition on the surface of the aluminum roll; the light source 2 can be a handheld shadowless lamp, and can also be a lighting lamp carried by a mobile phone, and a detection person only needs to hold a white reflecting plate and a light source by one hand, and black wire and black line detection is carried out on one side surface of the aluminum coil.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A method for rapidly detecting black wires on the surface of an aluminum coil on line is characterized by comprising the following steps: in the process of uncoiling an aluminum coil, a person holds an inclined white reflector at the uncoiling side of the aluminum coil close to the detected position of the aluminum coil, then a handheld light source is applied between the white reflector and the aluminum coil, the light source is projected to the white reflector, the white reflector forms an enhanced white image on the surface of the aluminum coil under the action of the light source, and the person directly observes the white phase on the surface of the aluminum coil by naked eyes to judge whether black threads exist on the surface of the aluminum coil or not under the contrast of the white image.
2. The method for rapidly detecting the black wire and the black line on the surface of the aluminum coil on line according to claim 1, wherein the method comprises the following steps: the white reflecting plate faces upwards or downwards towards one side of the aluminum coil.
3. The method for rapidly detecting the black wire and the black line on the surface of the aluminum coil on line according to claim 1 or 2, wherein the method comprises the following steps: the white reflecting plate is white paper or a white board.
4. The method for rapidly detecting the black wire and the black line on the surface of the aluminum coil on line according to claim 1, wherein the method comprises the following steps: the light source is positioned on the upper side, the lower side, the left side or the right side of the front side of the white reflector, and one side of the white reflector facing the aluminum coil is the front side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110628776.8A CN113231480B (en) | 2021-06-04 | 2021-06-04 | Method for rapidly detecting black wire and black line on surface of aluminum coil on line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110628776.8A CN113231480B (en) | 2021-06-04 | 2021-06-04 | Method for rapidly detecting black wire and black line on surface of aluminum coil on line |
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| CN113231480A true CN113231480A (en) | 2021-08-10 |
| CN113231480B CN113231480B (en) | 2023-07-11 |
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| CN111982917A (en) * | 2020-08-21 | 2020-11-24 | 无锡隆达金属材料有限公司 | Visual inspection method for surface quality of inner hole of copper or copper alloy short and straight pipe |
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2021
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| DE102007043937A1 (en) * | 2006-09-13 | 2008-03-27 | Innovent E.V. | Optically transparent dielectric coating thickness and refractive index determining method, involves determining theoretical reflectance minimum through numerical iteration, and finding thickness of coating to be determined |
| DE202010003121U1 (en) * | 2010-03-03 | 2010-06-02 | Ldv-Systeme Gmbh | Roll control device |
| CN202814894U (en) * | 2012-08-09 | 2013-03-20 | 大亚科技股份有限公司 | Device for detecting dirt on surface of aluminum foil |
| CN203231983U (en) * | 2013-05-16 | 2013-10-09 | 江西科伦药业有限公司 | On-line lamp inspection device for visible foreign matter determination |
| CN104345061A (en) * | 2013-08-06 | 2015-02-11 | 大连奥特马工业有限公司 | Defect detection method for opening and closing strip |
| CN104897679A (en) * | 2014-03-05 | 2015-09-09 | 鞍钢股份有限公司 | Method for inspecting surface defects of steel plate |
| CN106645181A (en) * | 2017-02-24 | 2017-05-10 | 清华大学 | Microscopic vision-based roller grinding surface defect detecting system |
| CN109001217A (en) * | 2018-08-25 | 2018-12-14 | 深圳市木森科技有限公司 | A kind of detection method and detection device of phone housing defect |
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| CN113231480B (en) | 2023-07-11 |
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