AU2021105569A4 - Device and method for laser cleaning of composite coating - Google Patents
Device and method for laser cleaning of composite coating Download PDFInfo
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- AU2021105569A4 AU2021105569A4 AU2021105569A AU2021105569A AU2021105569A4 AU 2021105569 A4 AU2021105569 A4 AU 2021105569A4 AU 2021105569 A AU2021105569 A AU 2021105569A AU 2021105569 A AU2021105569 A AU 2021105569A AU 2021105569 A4 AU2021105569 A4 AU 2021105569A4
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- 238000004140 cleaning Methods 0.000 title claims abstract description 84
- 238000000576 coating method Methods 0.000 title claims abstract description 69
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title claims abstract description 25
- 238000001228 spectrum Methods 0.000 claims abstract description 65
- 238000010521 absorption reaction Methods 0.000 claims abstract description 44
- 239000013307 optical fiber Substances 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 241000931526 Acer campestre Species 0.000 claims description 2
- 239000010410 layer Substances 0.000 abstract description 12
- 239000002356 single layer Substances 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- 230000031700 light absorption Effects 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 239000003086 colorant Substances 0.000 abstract 1
- 239000003973 paint Substances 0.000 description 18
- 229910000838 Al alloy Inorganic materials 0.000 description 5
- 239000000758 substrate Substances 0.000 description 4
- 239000010407 anodic oxide Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000000862 absorption spectrum Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000026676 system process Effects 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N2021/3196—Correlating located peaks in spectrum with reference data, e.g. fingerprint data
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Biochemistry (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Health & Medical Sciences (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
OF THE DISCLOSURE
The present disclosure relates to the field of metal surface cleaning, particularly to
a device and method for laser cleaning of a composite coating. The device comprises a
laser. The laser is connected with a cleaning head, one end of the cleaning head is
fixedly connected with a spectrum sensing device, the spectrum sensing device is
connected with a master control system, and the master control system is connected
with a laser control system. Through the present disclosure, coatings made of different
materials and having different colors have different light absorption wavelengths so as
to judge whether the coatings are cleaned up. The absorption peak values of a reflected
light irradiating on coatings to be cleaned are obtained through the spectrum sensing
device so as to judge whether the coatings are cleaned up, thereby realizing that the
single-layer coating of the composite coating on the surface of an aircraft is pertinently
and precisely removed, solving the problems of poor uniformity and time-consuming
and labor-consuming manual wiping. The device and method provided by the present
disclosure can be used for laser cleaning of a composite coating made of different
materials and having different layer numbers with laser, and has the universality.
-1/2
DRAWINGS
8 7 6
95
112
FIG. 1
1
Description
-1/2
8 7 6
112
FIG. 1
[01] The present disclosure relates to the field of metal surface cleaning, particularly to a device and method for laser cleaning of a composite coating.
[02] A composite coating refers to a spraying coating consisting of two or more materials. With application of alloy materials such as aluminum and magnesium and composite materials in aircraft industry, the performances of an aircraft, especially the flight speed, have been significantly improved, which puts forward higher requirements on the performances of aircraft skin paint. The coating of the surface of the aircraft generally has three layers among which the first layer is a primer clinging to an aluminum alloy shell, has a good adhesive force and supports a finish paint; the second layer is the finish paint which is a basic pattern paint; the third layer is a varnish which prevents wind erosion and is bright. LOGO on the surfaces of passenger and cargo aircrafts needs to be often changed due to commerce, the old surface coating needs to be cleared away when the surface of the aircraft is damaged or normally maintained every several years (generally 4-6 years), new coating is performed again, and clearing the paint on the surface of the skin is one of the problems of recoating the aircraft.
[03] Due to different uses, the requirements for paint removal are also different. Changing LOGO change only needs to remove the varnish and finish paint on the surface, for example, all the coatings on the surface need to be removed for maintenance. The traditional method is to remove the paint using a chemical paint remover, water pick, dry medium sand blasting and manual sanding. However, the mechanical method has high labor intensity and serious noise pollution, removing sewages on the surface can be easily re-adsorbed in the clean surface to form secondary pollution, so as to cause permanent damage to the surface of a part. For a wet chemical cleaning method, the cleaning time is difficultly effectively controlled, so acidic liquid and alkaline liquid still cause erosion on a substrate to different degrees, and meanwhile waste liquid discharged after chemical cleaning can seriously pollute the environment. The traditional paint removal method is significantly limited in the application of cleaning the surface of the aircraft skin. How to meet high precision, high definition and perform no damage cleaning on the surface of the substrate is a problem to be urgently solved for removing the coating of the aircraft skin.
[04] The invention patent "LASER CLEANING DEVICE AND METHOD FOR AN ALUMINUM ALLOY ANODIC OXIDE FILM AND A SURFACE PAINT FILM COMPOSITE LAYER", with application No. 201910853255.5, relates to cleaning of an aluminum alloy anodic oxide film and a surface paint film composite layer, but its manner is to completely remove all the oxide films and the surface paint films without removal of a single-layer coating.
[05] The invention patent "METHOD FOR PROTECTING AN ANODIC OXIDE FILM ON SURFACE OF A SUBSTRATE IN THE PROCESS OF LASER CLEANING
THE SKIN PAINT LAYER OF THE ALUMINUM ALLOY SUBSTRATE", with application No. 201910821366.8, relates to a removal manner of a composite coating on the surface of an aircraft, but its manner is to remove the finish paint and the primer on the surface utilizing different lasers to retain an aluminum alloy oxide layer without removal of a single-layer paint layer.
[06] The invention patent "METHOD FOR REMOVING COATING OF SURFACE OF AIRCRAFT SKIN BY LASER", with application No. 201910897789.8, relates to the method of laser cleaning aircraft skin, but its manner only involves a process of removing the paint layer by laser without the layered removal of a composite coating.
[07] In view of this, the present disclosure is especially put forward.
[08] The present disclosure provides a device and method for laser cleaning of a composite coating in order to solve the defects in the prior art.
[09] The present disclosure is implemented through the following technical solution:
[10] Provided is a device for laser cleaning of a composite coating, comprising a laser, the laser being connected with a cleaning head through energy transmission optical fiber, wherein one end of the cleaning head is fixedly connected with a spectrum sensing device, the spectrum sensing device is connected with a master control system via a data line, and the master control system is connected with a laser control system through a communication line A, and the laser control system is connected with the laser through a communication line B; the spectrum sensing device comprises a white light source, the entrance port of a light shielding cover is fixed on the light exist port of the white light source, the exist port of the light shielding cover is fixed on the entrance port of an integral sphere, the lower end of the light shielding cover is opened, the integral sphere is connected with a spectrometer, and the spectrometer is connected with the master control system through the data line; the master control system receives spectrum data transmitted from the spectrometer, the spectrum data is processed and then compared with the while light spectrum of a white light stored in the master control system to respectively obtain an initial absorption peak value and a cleaning absorption peak value, then the cleaning absorption peak value is compared with the initial absorption peak value in real time to obtain a difference value, and the maser control system controls whether the laser works or not through the laser control system according to the difference value.
[11] Preferably, the light shielding cover is V-shaped.
[12] Preferably, an included angle between the exit channel of the light shielding cover and a reflection channel is 10-30° .
[13] Preferably, magnesium oxide or barium sulfate is uniformly smeared on the inner wall of the light shielding cover.
[14] The present disclosure also comprises a method for laser cleaning of a composite coating, comprising the following steps:
[15] S1, a white light source is turned on, white a light emitted by the white light source irradiates on a to-be-cleaned coating, the integral sphere receives a reflected light, the reflected light is transmitted to a spectrometer through an optical fiber, spectrum data collected by the spectrometer is transmitted to a master control system through the data line, the master control system processes the received spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source having been stored inside to obtain an initial absorption peak value;
[16] S2, opening the laser to perform laser cleaning on the to-be-cleaned coating; and
[17] S3, the spectrum sensing device simultaneously keeps working while performing step S2, the master control system processes the spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source having been stored inside to obtain a cleaning absorption peak value, and meanwhile the cleaning absorption peak value is compared with the initial absorption peak value to obtain a difference value between the cleaning absorption peak value and the initial absorption peak value, and the difference value is compared with a threshold set in the master control system, if the difference value does not exceed the threshold, the laser continues working and repeats cleaning all the time; if the difference value exceeds the set threshold, the master control system gives an instruction to the laser control system through a communication line A, and the laser control system controls the laser to stop working.
[18] As a preferred embodiment:
[19] In step S2, the laser power of the laser is set as 200-500 W.
[20] In step S3, the threshold is set as 30 nm.
[21] The present disclosure has the beneficial effects:
[22] 1. For the paint removal requirements of the aircraft skin, the single-layer coating of the composite coating on the surface of the aircraft can be pertinently and precisely removed, solving the problems of poor uniformity and time-consuming and labor-consuming manual wiping.
[23] 2. The method of the present disclosure can be used for laser cleaning of a composite coating made of different materials and having different layer numbers, and has universality.
[24] 3. In the present disclosure, the problems that the single-layer cleaning is poor in manual uniformity and time-consuming and labor-consuming can be replaced at present; compared with the laser cleaning of the composite coating, layering cleaning can be achieved by using a single laser with simple operation; the difference between while light absorption spectrums is judged through the coatings with high accuracy; selective removal of the coatings can be effectively achieved through control of laser parameters
[25] FIG. 1 is a structural diagram of a device according to the present disclosure.
[26] FIG. 2 is a structural diagram of a spectrum sensing device according to the present disclosure.
[27] Reference signs in the drawings, 1 laser, 2 energy transmission optical fiber, 3 cleaning head, 4 spectrum sensing device, 5 data line, 6 master control system, 7 communication line A, 8 laser control system, 9 communication line B, 10 white light source, 11 light shielding cover, 12 to-be-cleaned coating, 13 integral sphere, 14 optical fiber, and 15 spectrometer.
[28] The specific examples of the present disclosure will be put forward. It is noted that the present disclosure is not limited to the following specific examples, and equivalent variations made on the basis of the technical solution of this application are all included within the protective scope of the present disclosure.
[29] The device for laser cleaning of a composite coating provided by the present disclosure includes a cleaning head 3 for cleaning a coating. In the present disclosure, cleaning is performed by laser. Therefore, the cleaning head 3 is connected with a laser 1 through an energy transmission optical fiber 2, and a pulse laser emitted by the laser 1 is transmitted to the cleaning head 3 through the energy transmission optical fiber 2. The present disclosure is different from the prior art in that the other end of the cleaning head 3 is fixedly connected with a spectrum sensing device 4, typically, the other end of the cleaning head 3 is fixedly connected with the shell of the spectrum sensing device 4 through bolts, and there are no special limitations here. The spectrum sensing device 4 of the present disclosure will be introduced in detail below.
[30] The spectrum sensing device 4 includes a white light source 10, an integral sphere 13 and a spectrometer 15, wherein the white light source 10 is used for emitting a white light, the integral sphere 13 is used for receiving the reflected light of the white light, and a light shielding cover 11 is connected between the white light source 10 and the integral sphere 13. The entrance port of the light shielding cover 11 is fixed on the light exit port of the white light source 10, the exit port of the light shielding cover 11 is fixed on the light entrance port of the integral sphere13, and the lower end of the light shielding cover 11 is opeed. In this way, an exit channel is formed between the entrance port and the lower opening end of the light shielding cover 11, and a reflection channel is formed between the lower opening end and the upper exit port of the light shielding cover 11. The white light emitted by the white light source 10 enters the exit channel, irradiates on the to-be-cleaned coating 12 through the lower opening end, and then a part of the reflected light of the white light irradiating on the to-be-cleaned coating 12 enters the reflection channel and enters the integral sphere 13 through the reflection channel. The integral sphere 13 receives the reflected light of the white light and then transmits the reflected light to the spectrometer 15 through the optical fiber 14. The spectrometer 15 collects the spectrum data of the reflected light of the white light and transmits the spectrum data to the master control system 6.
[31] In order to facilitate the collection of more reflected light of the white light, improve the measurement accuracy, and meanwhile optimize the volume of the spectrum sensing device 4, it is preferred that the shape of the light shielding cover 11 is designed as a V-shape, and an included angle between the exit channel and the reflection channel of the light shielding cover 11 is controlled between 10-30°, as shown in Fig. 1. The design of the light shielding cover 11 avoids the interference of light, impurities and natural light on the absorption spectrum in the process of laser cleaning, thereby improving the measurement accuracy.
[32] The light shielding cover 11 is further optimized, and magnesium oxide or barium sulfate is uniformly seared on the inner wall of the light shielding cover 11, so that a diffuse reflection coefficient in the light shielding cover 11 is close to 1, which is conducive to collection and transmission of the white light and the reflected light.
[33] The above spectrometer 15 is connected with the master control system 6 through the data line 5, the master control system 6 is connected with the laser control system 8 through the communication line A7, and the laser control system 8 is connected to the laser 1 through the communication line B9.
[34] The above master control system 6 stores the white light spectrum of the white light source 10 in the spectrum sensing device 4. The master control system 6 receives the spectrum data transmitted by the spectrometer 15, processes the spectrum data and then compares the processed spectrum data with the white light spectrum stored in the master control system 6 to obtain the absorption peak value;
[35] Before the to-be cleaned coating 12 is cleaned, the white light source 10 emits a white light to irradiate on the to-be-cleaned coating 12. The reflected light is collected by the integral sphere 13 and transmitted to the spectrometer 15. The master control system 6 receives the spectrum data transmitted by the spectrometer 15, processes the spectrum data and then compares the processed spectrum data with the white light spectrum stored in the master control system 6. The absorption peak value obtained at this moment is called an initial absorption peak value;
[36] In the process of cleaning the to-be-cleaned coating 12, the master control system 6 receives the spectrum data transmitted by the spectrometer 15 in real time, processes the spectrum data and then compares the processed spectrum data with the white light spectrum stored in the master control system 6 in real time. The absorption peak value obtained at this moment is called a cleaning absorption peak value.
[37] In the process of cleaning, the master control system 6 compares the cleaning absorption peak value with the initial absorption peak value in real time to obtain a difference value. If the difference value exceeds the set threshold, the master control system 6 controls the laser 1 through the laser control system 8 to stop working. If difference value does not exceed the threshold, the laser 1 can continue working and repeat cleaning until the difference value exceeds the threshold.
[38] The method for coating a cleaning using the device for laser cleaning of a composite coating provided by the present disclosure comprises the following steps:
[39] (I) Obtaining of the initial absorption peak value of the to-be-cleaned coating 12
[40] The white light source 10 in the spectrum sensing device 4 is turned on, the white light source 10 emits a white light through the light shielding cover 11 to irradiate on the to-be-cleaned coating 12, the reflected light is received by the integral sphere 13 and transmitted to the spectrometer 15 by the optical fiber 14, and the spectrum data collected by the spectrometer 15 is transmitted to the master control system 6 by the data line 5, The master control system 6 processes the received spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source 10 having been stored inside to obtain the light wavelength absorption range of the to-be-cleaned coating 12, and record absorption peak values. At this moment, the absorption peak value of the to-be-cleaned coating 12 before being cleaned is recorded as an initial absorption peak value.
[41] (II) laser cleaning of the to-be-cleaned coating 12
[42] The laser 1 is turned on, the pulse laser emitted by the laser 1 is transmitted to the cleaning head 3 through the energy transmission optical fiber 2, and the cleaning head 3 starts the cleaning work.
[43] As a further preferred embodiment, the laser power of the laser 1 of the present disclosure is set within a range of 200-500 W, which ensures that the laser cleaning parameter is from 1 kHz to 50 kHz. This parameter can guarantee that the thickness of the coating cleaned away each time is between 20 mm and 30 mm, avoiding the influence on the lower coating.
[44] (III) Judge whether the to-be-cleaned coating 12 is clean
[45] While step (2) is exerted, the spectrum sensing device 4 keeps working. The spectrum sensing device 4 is located in front of the cleaning direction of the cleaning head 3. In the process of cleaning, the white light emitted by the white light source 10 irradiates on the to-be-cleaned coating 12, and the reflected light of the white light is similarly received by the integral sphere 13 and transmitted to the spectrometer 15 by the optical fiber 14, the spectrum data collected by the spectrometer 15 is transmitted to the master control system 6 through from the data line 5, the master control system 6 processes the received spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source 10 having been stored inside to obtain the light wavelength absorption range of the to-be-cleaned coating 12 and records the absorption peak values. At this moment, the absorption peak value in the cleaning process is recorded as the cleaning absorption peak value.
[46] In the process of cleaning, the master control system 6 compares the cleaning absorption peak value with the initial absorption peak value in real time to obtain the difference value between the cleaning absorption peak value and the initial absorption peak value, and compares the difference value with the threshold set in the master control system 6. If the difference value does not exceed the threshold, the coating is not cleaned up, and the laser 1 continues working and repeats cleaning all the time; if the difference value exceeds the set threshold, it indicates that the next coating has been reached, and the to-be-cleaned coating 12 has been cleaned up. At this moment, the master control system 6 gives an instruction to the laser control system 8 through the communication line A7. The laser control system 8 controls the laser 1 to stop working, and the cleaning of the to-be-cleaned coating 12 is completed.
[47] The above threshold can be set according to spectral absorption characteristics of a specific coating. In this embodiment, for the aircraft coating, the preferred threshold is set to 30nm, that is, when the difference value between the cleaning absorption peak value and the initial absorption peak value is greater than or less than 30nm, it means that the to-be-cleaned coating 12 has been cleaned, and the master control system 6 controls the laser 1 to stop working.
[48] If the next layer needs to be cleaned, the above steps (I)-(III) are repeated.
[49] The above cleaning method of the present disclosure can ensure the cleaning accuracy and accurate layered cleaning, which not only can clean up the upper coating but also does not damage the lower coating.
[50] The embodiment described above is only one of the more preferred embodiments of the present disclosure. The general changes and substitutions made by those skilled in the art within the scope of the technical solution of the present disclosure shall be included in the protective scope of the present disclosure.
Claims (5)
1. A device for laser cleaning of a composite coating, comprising a laser (1), the laser (1) being connected with a cleaning head (3) through energy transmission optical fibers (2), wherein one end of the cleaning head (3) is fixedly connected with a spectrum sensing device (4), the spectrum sensing device (4) is connected with a master control system (6) via a data line (5), and the master control system (6) is connected with a laser control system (8) through a communication line A (7), and the laser control system (8) is connected with the laser (1) through a communication line B (9); the spectrum sensing device (4) comprises a white light source (10), the entrance port of a light shielding cover (11) is fixed on the light exist port of the white light source (10), the exist port of the light shielding cover (11) is fixed on the entrance port of an integral sphere (13), the lower end of the light shielding cover (11) is opened, the integral sphere (13) is connected with a spectrometer (15) through optical fibers (14), and the spectrometer (15) is connected with the master control system (6) through the data line (5); the master control system (6) receives spectrum data transmitted by the spectrometer (15), the spectrum data is processed and then compared with the while light spectrum of the white light (10) stored in the master control system (6) to respectively obtain an initial absorption peak value and a cleaning absorption peak value, and compare the cleaning absorption peak value with the initial absorption peak value in real time to obtain a difference value, and the maser control system (6) controls whether the laser (1) works or not through the laser control system (8) according to the difference value.
2. The device for laser cleaning of a composite coating according to claim 1, wherein the light shielding cover (11) is V-shaped; wherein an included angle between the exit channel of the light shielding cover (11) and a reflection channel is 10-30° .
3. The device for laser cleaning of a composite coating according to claim 1, wherein magnesium oxide or barium sulfate is uniformly smeared on the inner wall of the light shielding cover (11).
4. A method for laser cleaning of a composite coating using the device according to any one of claim 1 to 3, comprising the following steps: S1, a white light source (10) is turned on, a white light emitted by the white light source (10) irradiates on a to-be cleaned coating (12), the integral sphere (13) receives a reflected light, the reflected light is transmitted to a spectrometer (15) through an optical fiber (14), spectrum data (5) collected by the spectrometer (15) is transmitted to a master control system (6) through the data line (5), the master control system (6) processes the received spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source (10) having been stored inside to obtain an initial absorption peak value; S2, opening the laser (1) for laser cleaning of the to-be-cleaned coating (12); and S3, the spectrum sensing device (4) keeps working while exerting step S2, the master control system (6) processes the spectrum data and then compares the processed spectrum data with the white light spectrum of the white light source (10) having been stored inside to obtain a cleaning absorption peak value, and meanwhile the cleaning absorption peak value is compared with the initial absorption peak value in real time to obtain a difference value between the cleaning absorption peak value and the initial absorption peak value, and the difference value is compared with a threshold set in the master control system (6), if the difference value does not exceed the threshold, the laser (1) continues working and repeats cleaning all the time; if the difference value exceeds the set threshold, the master control system (6) gives an instruction to the laser control system (8) through a communication line A (7), and the laser control system (8) controls the laser (1) to stop working.
5. The method for laser cleaning of a composite coating according to claim 4, wherein in step S2, the laser power of the laser (1) is set as 200-500W; wherein in step S3, the threshold is set as 30 nm.
FIG. 1 －1/2－
DRAWINGS
FIG. 2 －2/2－
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021105569A AU2021105569A4 (en) | 2021-08-16 | 2021-08-16 | Device and method for laser cleaning of composite coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2021105569A AU2021105569A4 (en) | 2021-08-16 | 2021-08-16 | Device and method for laser cleaning of composite coating |
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| Publication Number | Publication Date |
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| AU2021105569A4 true AU2021105569A4 (en) | 2021-10-21 |
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| AU2021105569A Ceased AU2021105569A4 (en) | 2021-08-16 | 2021-08-16 | Device and method for laser cleaning of composite coating |
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2021
- 2021-08-16 AU AU2021105569A patent/AU2021105569A4/en not_active Ceased
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