CN101915765A - Flaw inspection method of metal plate micropore - Google Patents
Flaw inspection method of metal plate micropore Download PDFInfo
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- CN101915765A CN101915765A CN201010148832XA CN201010148832A CN101915765A CN 101915765 A CN101915765 A CN 101915765A CN 201010148832X A CN201010148832X A CN 201010148832XA CN 201010148832 A CN201010148832 A CN 201010148832A CN 101915765 A CN101915765 A CN 101915765A
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Abstract
The invention discloses a flaw inspection method of metal plate micropores, which comprises the following steps of: a, heating a metal palte; b, instantly pouring or spraying water onto the heated metal plate to cool the metal plate rapidly; and c, rapidly observing the metal plate by using a thermal infrared imager, and if holes are observed on the metal plate, proving that the metal plate has flaws like through holes, blind holes or impurities . The invention simple and easy to apply, not only can accurately detect the holes or impurities contained by the metal plate during production, but also can detect non-through holes on a steel plate and accurately display the positions of the holes.
Description
Technical field
The present invention relates to the sheet metal technical field of quality detection, particularly the detection technique of metal plate micropore defective.
Background technology
Sheet metal is thin plate especially, as aluminium sheet, steel plate and copper coin, in process of production since a variety of causes in the operation of rolling time regular meeting hole occurs or sneaked into impurity, such product is a substandard product.
Chinese patent CN1758967A (international application no PCT/FR2004/000679), a kind of parts that detect the hole in the material winding of advancing are continuously disclosed, (temporarily slightly---summary) can be used for checking the hole on the steel plate that high-speed and continuous advances, utilize light emission sub-component and the point-to-point method of light-receiving sub-component, detect the hole on the steel plate, its weak point is to detect the hole that does not penetrate on the steel plate, can not detect the impurity in the steel plate, the position that can not accurately show hole, and the image that can't show detection.
Chinese patent CN201138332Y, a kind of steel plate hole on-line measuring device is disclosed, (temporarily slightly---summary), utilize ultraviolet light to detect hole in the steel plate, its weak point detects inconvenient, can not detect the hole that does not penetrate on the steel plate, can not detect the impurity in the steel plate, also be vulnerable to other interference of light sources.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, provide a kind of and make things convenient for, detect accurately, intuitively the method for micropore defective on the sheet metal
Technical scheme of the present invention is as follows:
Flaw inspection method of metal plate micropore comprises the steps: a, sheet metal is heated; B, on the sheet metal after the heating moment water-sprinkling or water spray make it rapid cooling; C, observe with thermal infrared imager fast on sheet metal, as observe hole is arranged on the sheet metal, proving has through hole, blind hole or impurity defect on the sheet metal.
Furthermore: behind described step c, increase steps d: observe same position with thermal infrared imager again after the sheet metal temperature is recovered, step c observes hole on the sheet metal, and steps d is also observed hole on the sheet metal, prove the through hole on the sheet metal; Step c observes hole on the sheet metal, steps d is observed does not have defective hole on the sheet metal, and proving has blind hole or impurity defect on the sheet metal.
Described sheet metal is aluminium sheet, steel plate or the copper coin in aluminium sheet, steel plate or copper coin, the especially rolling mill practice.
In described step a, it is 190-250 ℃ that red temperature is burnt in the sheet metal heating; In described step b, with the water consumption of sheet metal cooling to allow the sheet metal temperature after the cooling be controlled between 160-170 ℃.
The invention has the beneficial effects as follows:
Compared with prior art, the present invention is simple, but not only real-time online, accurately detect contained hole of sheet metal and impurity in the production run, and can detect the blind hole that does not penetrate on the steel plate, and accurately show the position of hole.
The present invention is further illustrated in conjunction with the embodiments.
Embodiment
Embodiment 1:
Flaw inspection method of metal plate micropore, described sheet metal is selected aluminium sheet for use, comprises the steps: a, aluminium sheet is heated to 190-250 ℃, as 201 ℃; B, on the aluminium sheet after the heating moment water-sprinkling or water spray make it sharply to be cooled to 160-170 ℃, as 164 ℃; C, observing fast with thermal infrared imager on aluminium sheet, as observe on the aluminium sheet porosely, then may be through hole, half logical blind hole or impurity, and this sheet metal defectiveness is described.Afterwards, along with temperature recovery hole on the aluminium sheet just can disappear, should grasp opportunity.In order to determine that further viewed hole is through hole, half blind hole or the impurity that leads to, need take d: after the sheet metal temperature is recovered, observe same position with thermal infrared imager again, step c observes hole on the sheet metal, steps d is also observed hole on the sheet metal, proving has through hole on the sheet metal; Step c observes hole on the sheet metal, steps d is observed does not have defective hole on the sheet metal, and proving has blind hole or impurity defect on the sheet metal.
Embodiment 2: sheet metal is a steel plate, and the method that detects hole defect is the same, 250 ℃ of heating-up temperatures or more than, about 160 ℃ of cooling temperature can be lower.
Embodiment 3: sheet metal is a copper coin, and the method that detects hole defect is the same, 220 ℃ of heating-up temperatures or more than, about 165 ℃ of cooling temperature.
In the present invention's technical scheme required for protection sheet metal be not limited to aluminium sheet, steel plate and copper coin, other sheet metal is also being included wherein.
Water-sprinkling or water spray described in the present invention's technical scheme required for protection, water wherein, also available other refrigerant replaces, and the replacement scheme of deriving thus also should be within the present invention's scope required for protection.
Claims (6)
1. flaw inspection method of metal plate micropore comprises the steps: a, sheet metal is heated; B, on the sheet metal after the heating moment water-sprinkling or water spray make it rapid cooling; C, on sheet metal, observe with thermal infrared imager fast, as observe hole is arranged on the sheet metal, prove through hole, blind hole or impurity defect on the sheet metal.
2. flaw inspection method of metal plate micropore according to claim 1, it is characterized in that: behind described step c, increase steps d: after the sheet metal temperature is recovered, observe same position with thermal infrared imager again, step c observes hole on the sheet metal, steps d is also observed hole on the sheet metal, proving has through hole on the sheet metal; Step c observes hole on the sheet metal, steps d is observed does not have defective hole on the sheet metal, and proving has blind hole or impurity defect on the sheet metal.
3. flaw inspection method of metal plate micropore according to claim 1 is characterized in that: described sheet metal is aluminium sheet, steel plate or copper coin.
4. flaw inspection method of metal plate micropore according to claim 3 is characterized in that: described steel plate is aluminium sheet, steel plate or the copper coin in the rolling mill practice.
5. according to described any flaw inspection method of metal plate micropore of claim 1-4, it is characterized in that in described step a that it is 190-250 ℃ that red temperature is burnt in the sheet metal heating; In described step b, with the water consumption of sheet metal cooling to allow the sheet metal temperature after the cooling be controlled between 160-170 ℃.
6. flaw inspection method of metal plate micropore according to claim 5 is characterized in that: in described step a, red temperature is burnt in the sheet metal heating be about 200 ℃; In described step b, with the water consumption of sheet metal cooling to allow the sheet metal temperature after the cooling be controlled between 165 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010148832 CN101915765B (en) | 2010-01-14 | 2010-03-17 | Flaw inspection method of metal plate micropore |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010004085.2 | 2010-01-14 | ||
| CN201010004085 | 2010-01-14 | ||
| CN 201010148832 CN101915765B (en) | 2010-01-14 | 2010-03-17 | Flaw inspection method of metal plate micropore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101915765A true CN101915765A (en) | 2010-12-15 |
| CN101915765B CN101915765B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010148832 Active CN101915765B (en) | 2010-01-14 | 2010-03-17 | Flaw inspection method of metal plate micropore |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5562345A (en) * | 1978-11-02 | 1980-05-10 | Kawasaki Steel Corp | Surface flaw detection method for steel material |
| JPS6276436A (en) * | 1985-09-30 | 1987-04-08 | Furukawa Electric Co Ltd:The | Internal defect detecting method for plate material |
| CN101136346A (en) * | 2007-08-31 | 2008-03-05 | 中山大学 | Chip welding spot on-line detecting, defect identification device and chip packaging device |
| DE102008012533A1 (en) * | 2008-03-04 | 2009-09-10 | INPRO Innovationsgesellschaft für fortgeschrittene Produktionssysteme in der Fahrzeugindustrie mbH | Surface defect and/or internal defect testing method for connected component, involves strongly cooling droplets of water spray by steep temperature gradients, and homogenously and convectively exciting water spray for thermography |
-
2010
- 2010-03-17 CN CN 201010148832 patent/CN101915765B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5562345A (en) * | 1978-11-02 | 1980-05-10 | Kawasaki Steel Corp | Surface flaw detection method for steel material |
| JPS6276436A (en) * | 1985-09-30 | 1987-04-08 | Furukawa Electric Co Ltd:The | Internal defect detecting method for plate material |
| CN101136346A (en) * | 2007-08-31 | 2008-03-05 | 中山大学 | Chip welding spot on-line detecting, defect identification device and chip packaging device |
| DE102008012533A1 (en) * | 2008-03-04 | 2009-09-10 | INPRO Innovationsgesellschaft für fortgeschrittene Produktionssysteme in der Fahrzeugindustrie mbH | Surface defect and/or internal defect testing method for connected component, involves strongly cooling droplets of water spray by steep temperature gradients, and homogenously and convectively exciting water spray for thermography |
Non-Patent Citations (3)
| Title |
|---|
| 《制造业自动化》 20091031 徐长航等 红外图像处理技术在金属表面缺陷检测中的应用 51-52 1-6 第31卷, 第10期 * |
| 《机械工程学报》 20090430 徐科等 热轧带钢表面缺陷在线检测的方法与工业应用 111-114 1-6 第45卷, 第4期 2 * |
| 徐长航等: "红外图像处理技术在金属表面缺陷检测中的应用", 《制造业自动化》 * |
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| Publication number | Publication date |
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| CN101915765B (en) | 2013-04-17 |
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