Device and method for laser cleaning composite coating

Abstract

The invention relates to the field of metal surface cleaning, in particular to a device and method for performing laser cleaning on a composite coating. The device includes 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 main control system, and the main control system is connected with a laser control system. The principle that different materials and color coatings have different light absorption wavelengths is used so as to judge whether the coating is cleaned up or not, the absorption peak of the reflected light irradiated on a coating to be cleaned is obtained through the spectrum sensing device so as to judge whether the coating is cleaned up or not,a single-layer coating in a composite coating on the surface of an aircraft can be precisely and specifically removed, the problems that the uniformity is poor and time and labor are wasted in the current manual wiping are solved, composite coatings of different materials and different layers can be subjected to laser cleaning, and universality is achieved.

Description

technical field [0001] The invention relates to the field of metal surface cleaning, in particular to a device and method for laser cleaning composite coatings. Background technique [0002] Composite coating refers to a spray coating composed of two or more materials. With the application of aluminum, magnesium and other alloy materials and composite materials in the aircraft manufacturing industry, the performance of the aircraft, especially the flight speed, has been greatly improved. The performance of aircraft skin coatings also puts forward higher requirements. There are generally three layers of aircraft surface coatings. The first layer is primer, which is close to the aluminum alloy shell with good adhesion and supports the top coat; the second layer is top coat, which is the basic pattern paint; the third layer is varnish, which is wind-resistant and bright. The LOGO on the surface of passenger and cargo aircraft needs to be replaced frequently due to commercial ...

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Problems solved by technology

[0004] Invention patent "Laser cleaning device and method for aluminum alloy anodized film and surface paint film composite layer", application number 201910853255.5, involves cleaning of aluminum alloy anodized film and surface paint film composite layer, but the method is to clean the oxide film and surface paint film Total removal, methods not involving single coat removal

[0005] Invention patent "A method for protecting the anodized film on the surface of the aluminum alloy substrate during the process of laser cleaning the skin paint layer", application number 201910821366.8, which involves the removal method of the composite coating on the surface of the aircraft, but the method is to use different lasers to remove the surface surface Paints and primers, retaining the oxide layer of aluminum alloys, not dealing with methods of removal of single-coat paint layers

[0006] Invention patent "A Method for Laser Removal of Surface Coating of Aircraft Skins", application number 201910897789.8, involves laser cleaning of aircraft skins, but the method only involves laser paint removal process, not layered removal of composite coatings Way

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