CN114985939B - Surface paint removal method for carbon fiber reinforced resin matrix composite material containing conductive layer - Google Patents
Surface paint removal method for carbon fiber reinforced resin matrix composite material containing conductive layer Download PDFInfo
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- CN114985939B CN114985939B CN202210550887.6A CN202210550887A CN114985939B CN 114985939 B CN114985939 B CN 114985939B CN 202210550887 A CN202210550887 A CN 202210550887A CN 114985939 B CN114985939 B CN 114985939B
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- laser
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
- B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The invention provides a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer; the method comprises the following steps: step 1, fixing a sample to be processed on a working platform, and aligning one surface coated with a paint layer with a laser cleaning head; step 2, turning on a pulse laser, and selecting laser parameters of high power, low frequency and wide pulse to remove partial paint layers on the surface of the material; step 3, repeating the step 2 until a small amount of paint layer remains; step 4, adopting the pulse laser which is the same as the step 2, selecting laser parameters of low power, high frequency and narrow pulse to remove the residual paint layer on the surface of the material, and carrying out strengthening treatment on the conductive layer; and 5, turning off the laser, removing the residual waste on the surface of the sample, and taking out the sample. The invention adopts the pulse laser to remove the paint coating, realizes nondestructive removal and performance enhancement of the conductive layer through layered removal and laser enhancement, has high efficiency and wide application range, and has important significance on the repair technology of the aviation aircraft.
Description
Technical Field
The invention relates to the technical field of advanced laser manufacturing of aircraft surfaces; in particular to a paint removing method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer.
Background
The carbon fiber reinforced resin matrix composite is widely applied to modern aviation aircrafts. Because of considering the damage of lightning strike phenomenon, the industry generally uses high pressure to spray aluminum powder, copper powder, tin powder and other metal powder on the surface of the material to form a conductive layer, thereby playing a role in protecting against the damage caused by lightning strike. The surface of the aviation aircraft is painted before leaving the factory, so that the purpose is to improve the corrosion resistance, impact resistance and strong ultraviolet irradiation resistance of the aircraft in a severe service environment. Due to the influence of sunlight, temperature, humidity and other factors, the paint layer on the surface of the airplane can be aged, cracked, partially fallen and the like. Therefore, the aviation aircraft needs to perform work operations such as paint removal, repainting and the like regularly.
The traditional paint removal method mainly comprises the following steps: chemical removal and mechanical removal. The traditional removing method has low working efficiency, severe working environment, serious pollution and high cost; and thus damage to the conductive layer, thereby reducing the conductive efficiency. The chemical corrosion and mechanical vibration phenomena exist in the traditional paint removal method, and the bonding mode between the conductive layer and the matrix is the mechanical bonding between metal and resin, so that the bonding strength between the conductive layer and the matrix can be greatly reduced by using the traditional paint removal method, and the protection effect of the conductive layer on the matrix is finally affected. The conventional method is gradually difficult to be applied to modern aviation materials having a complex structure.
Disclosure of Invention
The invention aims to provide a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer.
The invention is realized by the following technical scheme:
the invention relates to a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer, which comprises the following steps:
step 1, fixing a sample to be processed on a working platform, and aligning one surface coated with a paint layer with a laser cleaning head;
step 2, turning on a pulse laser, and selecting laser parameters of high power, low frequency and wide pulse to remove partial paint layers on the surface of the material;
step 3, repeating the step 2 until a small amount of paint layer remains;
step 4, adopting the pulse laser which is the same as the step 2, selecting laser parameters of low power, high frequency and narrow pulse to remove the residual paint layer on the surface of the material, and carrying out strengthening treatment on the conductive layer;
and 5, turning off the laser, removing the residual waste on the surface of the sample, and taking out the sample.
Preferably, the pulse laser is Nd-YAG laser or CO 2 A laser or a fiber laser.
Preferably, the laser wavelength range of the pulse laser is 100nm-30um; the average power of the pulse laser is in the range of 100W-300W.
Preferably, the pulse laser adopts a galvanometer system to scan light beams, the laser scanning speed is 500mm/s-10000mm/s, and the overlap ratio between adjacent pulses is 1% -99%. Specifically, the on-state delay and off-state delay of the laser pulse, and the scanning mode of the laser are controlled and set by a computer program.
Preferably, in step 2, the output power of the pulse laser ranges from 20% to 100%; the frequency range of the pulse laser is 1kHz-500kHz; the output pulse width of the pulse laser ranges from 200ns to 500ns.
Preferably, in step 4, the output power of the pulse laser ranges from 1% to 20%; the output frequency range of the pulse laser is 500kHz-2000kHz; the output pulse width range of the pulse laser is 1ns-200ns.
Preferably, in step 4, the conductive layer is prepared from pure metal powder of aluminum powder, copper powder or tin powder.
Preferably, in step 4, the conductive layer is prepared by multi-component mixing of aluminum powder, copper powder and tin powder pure metal powder.
The invention has the following advantages:
(1) The invention adopts a pulse laser to remove the paint coating on the surface of the carbon fiber reinforced resin matrix composite material containing the conductive layer; the principle of the invention is as follows: the method realizes the thorough removal of the paint coating by the ablation effect, the thermoelastic vibration effect and the plasma impact effect generated when the laser acts on the surface of the material, and has the advantages of high efficiency, environmental protection, non-contact, high precision, wide application range and the like compared with the traditional paint removal mode.
(2) The invention adopts a mode of multiple removal, and by controlling or adjusting laser parameters in different times of removal and utilizing the difference of interaction modes of laser and materials under different parameters, the nondestructive removal of the conductive layer is realized, and meanwhile, the conductive layer structure is reinforced, and the conductive efficiency is further improved.
Drawings
FIG. 1 is a schematic structural view of a carbon fiber reinforced resin matrix composite material containing a conductive layer according to the present invention and a schematic view of a laser cleaning process;
in the figure, 1 is a laser pulse beam, 2 is a paint coating, 3 is a conductive layer, and 4 is a carbon fiber reinforced resin matrix composite base layer.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only further illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The embodiment relates to a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer, which comprises the following steps:
firstly, cutting a carbon fiber reinforced resin matrix composite material (a paint coating 2, a conductive layer 3 and a carbon fiber reinforced resin matrix composite material base layer 4 sequentially from top to bottom) with a paint layer 2 coated on the surface and containing an aluminum powder conductive layer to a proper size by using a cutting machine, wherein the specific structure is shown in figure 1; fixing a sample to be processed on a working platform, and aligning the surface covered with the paint layer 2 with the laser pulse beam 1;
YAG laser with average power of 300W is used for removing the surface paint layer 2, the wavelength of the used laser is 1064nm, the laser spot is round, the diameter is 50um, the laser output power is 30%, the pulse frequency is 200kHz, the pulse width is 200ns, the scanning speed is 1000mm/s, and the pulse lap rate is 50% by adopting a bow-shaped scanning mode;
thirdly, reducing the output power of the laser to 20% by using the same type of laser in the second step, and keeping the rest parameters unchanged;
fourth, the same type of laser is used in the second step, the laser output power is adjusted to be 5%, the pulse frequency is 1000kHz, the pulse width is 50ns, the scanning speed is 8000mm/s, and the lap joint rate is 50%;
and fifthly, closing the laser, cleaning up the residual waste on the surface of the sample, and taking out the sample.
Example 2
The embodiment relates to a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer, which comprises the following steps:
firstly, cutting a carbon fiber reinforced resin matrix composite material (a paint coating 2, a conductive layer 3 and a carbon fiber reinforced resin matrix composite material base layer 4 sequentially from top to bottom) with a paint 2 coated on the surface to a proper size by using a cutting machine, fixing a sample to be treated on a working platform, and aligning one surface coated with a paint layer with a laser pulse beam 1;
second, C0 with an average power of 100W is used 2 The laser is used for removing the surface paint layer, the wavelength of the laser is 10.6nm, the laser spot is square, the side length is 50um, the laser output power is 50%, the pulse frequency is 300kHz, the pulse width is 300ns, the scanning speed is 900mm/s, and the pulse lap rate is 30% by adopting a bow-shaped scanning mode;
third, repeating the second step;
fourth, the same type of laser in the second step is used, the laser output power is adjusted to be 10%, the pulse frequency is 1500kHz, the pulse width is 100ns, the scanning speed is 5000mm/s, and the lap joint rate is 50%;
and fifthly, closing the laser, cleaning up the residual waste on the surface of the sample, and taking out the sample.
Example 3
The embodiment relates to a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer, which comprises the following steps:
firstly, cutting a carbon fiber reinforced resin matrix composite material (a paint coating 2, a conductive layer 3 and a carbon fiber reinforced resin matrix composite material base layer 4 sequentially from top to bottom) with a paint coated on the surface to a proper size by using a cutting machine, fixing a sample to be treated on a working platform, and aligning one surface coated with a paint layer with a laser pulse beam 1;
the second step, the fiber laser with the average power of 250W is used for removing the surface paint layer, the wavelength of the laser is 2100nm, the laser spot is round, the diameter is 100um, the laser output power is 50%, the pulse frequency is 300kHz, the pulse width is 200ns, the scanning speed is 1000mm/s, and the pulse lap rate is 80% by adopting an arc scanning mode;
thirdly, the same type laser in the second step is used, the laser output power is adjusted to be 5%, the pulse frequency is 1000kHz, the pulse width is 100ns, the scanning speed is 4000mm/s, and the pulse lap rate is 20%;
and fourthly, closing the laser, cleaning up the residual waste on the surface of the sample, and taking out the sample.
Example 4
The embodiment relates to a paint removal method for the surface of a carbon fiber reinforced resin matrix composite material containing a conductive layer, which comprises the following steps:
firstly, cutting a carbon fiber reinforced resin matrix composite material (a paint coating 2, a conductive layer 3 and a carbon fiber reinforced resin matrix composite material base layer 4 in sequence from top to bottom) with a paint coated on the surface and containing an aluminum/nickel bi-component metal powder conductive layer to a proper size by using a cutting machine, fixing a sample to be treated on a working platform, and aligning one surface coated with a paint layer with a laser pulse beam 1;
second, C0 with an average power of 100W is used 2 The laser is used for removing the surface paint layer, the wavelength of the laser is 10.6nm, the laser spot is circular, the diameter is 1mm, the laser output power is 30%, the pulse frequency is 500kHz, the pulse width is 250ns, the scanning speed is 800mm/s, and the pulse lap rate is 60% by adopting a bow-shaped scanning mode;
thirdly, the same type laser in the second step is used, the laser output power is adjusted to be 10%, the pulse frequency is 1100kHz, the pulse width is 100ns, the scanning speed is 2000mm/s, and the pulse lap rate is 10%;
and fourthly, closing the laser, cleaning up the residual waste on the surface of the sample, and taking out the sample.
The invention adopts a pulse laser to remove the paint coating on the surface of the carbon fiber reinforced resin matrix composite material containing the conductive layer; the principle of the invention is as follows: the method realizes the thorough removal of the paint coating by the ablation effect, the thermoelastic vibration effect and the plasma impact effect generated when the laser acts on the surface of the material, and has the advantages of high efficiency, environmental protection, non-contact, high precision, wide application range and the like compared with the traditional paint removal mode. The invention adopts the pulse laser to remove the paint coating, realizes nondestructive removal and performance enhancement of the conductive layer through layered removal and laser enhancement, has high efficiency and wide application range, and has important significance on the repair technology of the aviation aircraft.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (1)
1. The paint removing method for the surface of the carbon fiber reinforced resin matrix composite material containing the conductive layer is characterized by comprising the following steps of:
step 1, fixing a sample to be processed on a working platform, and aligning one surface coated with a paint layer with a laser cleaning head;
step 2, turning on a pulse laser, and selecting laser parameters of high power, low frequency and wide pulse to remove partial paint layers on the surface of the material;
step 3, repeating the step 2 until a small amount of paint layer remains;
step 4, adopting the pulse laser which is the same as the step 2, selecting laser parameters of low power, high frequency and narrow pulse to remove the residual paint layer on the surface of the material, and carrying out strengthening treatment on the conductive layer;
step 5, closing the laser, removing the residual waste on the surface of the sample, and taking out the sample;
the pulse laser is Nd-YAG laser and CO 2 A laser or a fiber laser;
the laser wavelength range of the pulse laser is 100nm-30um; the average power range of the pulse laser is 100W-300W;
the pulse laser adopts a galvanometer system to scan light beams, the laser scanning speed is 500mm/s-10000mm/s, and the overlap ratio between adjacent pulses is 1% -99%;
in the step 2, the output power range of the pulse laser is 20% -100%; the frequency range of the pulse laser is 1kHz-500kHz; the output pulse width range of the pulse laser is 200ns-500ns;
in the step 4, the output power range of the pulse laser is 1% -20%; the output frequency range of the pulse laser is 500kHz-2000kHz; the output pulse width range of the pulse laser is 1ns-200ns, and the conducting layer is prepared from pure metal powder of aluminum powder, copper powder or tin powder or is prepared by multi-component mixing of pure metal powder of aluminum powder, copper powder and tin powder.
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| CN202210550887.6A CN114985939B (en) | 2022-05-20 | 2022-05-20 | Surface paint removal method for carbon fiber reinforced resin matrix composite material containing conductive layer |
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| CN202210550887.6A CN114985939B (en) | 2022-05-20 | 2022-05-20 | Surface paint removal method for carbon fiber reinforced resin matrix composite material containing conductive layer |
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| CN114985939B true CN114985939B (en) | 2023-08-18 |
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| US4756765A (en) * | 1982-01-26 | 1988-07-12 | Avco Research Laboratory, Inc. | Laser removal of poor thermally-conductive materials |
| CN108160620A (en) * | 2017-12-29 | 2018-06-15 | 武汉金顿激光科技有限公司 | A kind of face of weld Paint removing process |
| CN108787636A (en) * | 2018-08-01 | 2018-11-13 | 湖南信奥光电技术有限公司 | A kind of method of laser cleaning removal composite material surface enamelled coating |
| CN109821823A (en) * | 2019-04-08 | 2019-05-31 | 哈尔滨工业大学 | A kind of CO2Laser/ps pulsed laser and ns pulsed laser compound cleaning method |
| CN110449418A (en) * | 2019-09-19 | 2019-11-15 | 中国民用航空飞行学院 | A kind of surface paint removal method and its application of Aluminum alloy airplane skin |
| CN111014185A (en) * | 2019-11-06 | 2020-04-17 | 株洲国创轨道科技有限公司 | Method and device for cleaning paint by laser |
| CN112827947A (en) * | 2021-02-19 | 2021-05-25 | 铭镭激光智能装备（河源）有限公司 | Laser-based paint removal method and system, terminal device and storage medium |
| CN113732519A (en) * | 2021-09-03 | 2021-12-03 | 陈亚军 | Design method for laser paint removal process parameters of aluminum alloy aircraft skin |
| CN113877893A (en) * | 2021-08-20 | 2022-01-04 | 西安飞机工业（集团）有限责任公司 | Method for laser cleaning of cadmium coating on surface of workpiece and laser cleaning device |
-
2022
- 2022-05-20 CN CN202210550887.6A patent/CN114985939B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4756765A (en) * | 1982-01-26 | 1988-07-12 | Avco Research Laboratory, Inc. | Laser removal of poor thermally-conductive materials |
| CN108160620A (en) * | 2017-12-29 | 2018-06-15 | 武汉金顿激光科技有限公司 | A kind of face of weld Paint removing process |
| CN108787636A (en) * | 2018-08-01 | 2018-11-13 | 湖南信奥光电技术有限公司 | A kind of method of laser cleaning removal composite material surface enamelled coating |
| CN109821823A (en) * | 2019-04-08 | 2019-05-31 | 哈尔滨工业大学 | A kind of CO2Laser/ps pulsed laser and ns pulsed laser compound cleaning method |
| CN110449418A (en) * | 2019-09-19 | 2019-11-15 | 中国民用航空飞行学院 | A kind of surface paint removal method and its application of Aluminum alloy airplane skin |
| CN111014185A (en) * | 2019-11-06 | 2020-04-17 | 株洲国创轨道科技有限公司 | Method and device for cleaning paint by laser |
| CN112827947A (en) * | 2021-02-19 | 2021-05-25 | 铭镭激光智能装备（河源）有限公司 | Laser-based paint removal method and system, terminal device and storage medium |
| CN113877893A (en) * | 2021-08-20 | 2022-01-04 | 西安飞机工业（集团）有限责任公司 | Method for laser cleaning of cadmium coating on surface of workpiece and laser cleaning device |
| CN113732519A (en) * | 2021-09-03 | 2021-12-03 | 陈亚军 | Design method for laser paint removal process parameters of aluminum alloy aircraft skin |
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