A handheld self-adaptive laser cleaning device with self-converting dual-wavelength laser beams

Abstract

The invention provides a hand-held adaptive laser cleaning device capable of self-changing double-wavelength laser beams. The hand-held adaptive laser cleaning device comprises a laser, a transmission fiber, a lifting focusing assembly, a laser ranging sensor, a galvanometer scanning system, a lifting guide electric driving assembly and a double-wavelength laser beam composite system. The galvanometer scanning system is used for focusing the incident laser beams on the surface of a workpiece, and enabling the laser beams to make scanning movement on the surface of the workpiece according to the set track. The lifting focusing assembly is arranged below the laser beam emitting end of the galvanometer scanning system. The input end of the double-wavelength laser beam composite system and the laser are connected through the transmission fiber, the double-wavelength laser beams are output after internal optical transformation, and the output end of the double-wavelength laser beam composite system is fixedly connected with the laser beam incident end of the galvanometer scanning system. According to the hand-held adaptive laser cleaning device, the two laser beams with the different wavelengths act on the surface of the material simultaneously so that composite pollutants of various components can be completely removed simultaneously, and the cleaning quality is greatly improved.

Description

technical field [0001] The invention belongs to the field of laser cleaning, and in particular relates to a hand-held self-adaptive laser cleaning device for self-converting dual-wavelength laser beams. Background technique [0002] Cleaning is aimed at the dirt, rust or coating on the surface of the material, using chemical or physical principles to make it evaporate or peel off instantly, that is, to remove the surface attachment or surface coating of the object and obtain a clean material surface. [0003] At present, there are two types of surface cleaning technologies at home and abroad: chemical cleaning and physical cleaning. Chemical cleaning mainly uses chemical reactions to remove the main chemical components in the dirt. Due to incomplete cleaning and the discharge of a large amount of acid and salt during cleaning, it pollutes the environment and corrodes equipment, so the scope of application is relatively small. In contrast, the physical cleaning method is to ...

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Problems solved by technology

Studies have shown that dry ice cleaning is most effective when it is applied to remove non-metallic dirt from metal substances. Therefore, it is widely used to clean organic residues or pollutants in precision parts and molds. The disadvantage is that it is difficult to clean stubborn metal oxides. thorough

Gas blast cleaning has good performance on stubborn stains such as various inks, paints and coatings. Famous aviation manufacturing companies such as Boeing and Airbus as well as the U.S. Air Force are using gas blast cleaning technology to remove paint from aircraft, but its shortcomings The reason is that the cost of consumables is high, the cleaning depth is limited, and there are problems such as microscopic residues and mechanical stress deformation.

The disadvantage of ultrasonic cleaning technology is that it is limited by the size of the cleaning pool equipment. It is generally only suitable for cleaning small parts in the workshop. It is difficult to clean large parts online, and it will also produce a lot of pollution and toxic waste water.

[0010] 1) Most of the laser cleaning machines are handheld devices, and the control method completely depends on the operator holding the cleaning processing head, and relying on the human eye (or using a distance sensor) to maintain a reasonable focus range of the laser beam on the surface of the workpiece, resulting in poor precision and physical exertion Large, cleaning efficiency is not high

[0011] 2) Generally, single-wavelength pulsed lasers are used for cleaning and processing, which completely relies on the overlapping scanning of Gaussian laser beams to ablate and remove pollutants on the surface of the material, which is limited by the absorption rate of different materials for single-wavelength laser energy and the interaction between laser and matter. The mechanism of action is different, and it is difficult to completely remove complex pollutants with multiple components (metal rust, organic polymer attachments, inorganic oxides, etc.), the cleaning quality is not high, and it cannot meet the ultra-fine cleaning requirements of complex pollutants

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