Special issue-Laser cleaning technology
2023, 52(2): 20220835.
doi: 10.3788/IRLA20220835
Laser with the high brightness and good direction is irradiated to the object to be cleaned. After laser beam is absorbed by the pollution layer and/or substrate, with such processes as light stripping, vaporization, the adhesion force between pollutants and substrate is overcome so that pollutants leave the surface of the object, to achieve the purpose of cleaning, while causing no damage of the object itself. After the 1980s, laser cleaning technology has received more and more attentions. In the past 40 years, as a new efficient environmental cleaning technology, laser cleaning technology has developed rapidly and has been used in electronic components cleaning, cultural relics maintenance, paint and rust removal and other fields. Since 2010, further research on laser cleaning has been carried out, and great achievements have been made in the detection and intelligent control of laser cleaning. Breakthroughs have been made in the mechanism of laser cleaning. Chinese scientists have also made great contributions. The paper summarizes the principle, characteristics, origin and development of laser cleaning technology in the past 40 years, and introduces the development of laser cleaning in China in recent years.
2023, 52(2): 20220784.
doi: 10.3788/IRLA20220784
Laser cleaning technology has many advantages, such as non-contact, high cleaning accuracy, minor damage to the substrate, and being environmentally friendly. It plays an increasingly important role in intelligent manufacturing. With the development of laser cleaning technology, the need for rapid detection and accurate evaluation of laser cleaning quality is becoming increasingly urgent. The laser interacts with the layer to be cleaned and the substrate during laser cleaning. By collecting and analyzing the light, sound, and other signals and surface characteristics changes during the interaction between laser and substance, real-time characterization of the cleaning process and results can be realized, which is gradually widely used in the automated laser precision cleaning process. This review summarizes the working principle and research progress of laser cleaning monitoring technologies such as acoustic wave monitoring, spectral, and image monitoring. The possible future development and trend of laser cleaning monitoring technology are also discussed.
2023, 52(2): 20220780.
doi: 10.3788/IRLA20220780
Laser paint removal technology has the advantages of high efficiency, environmental protection, high safety, real-time monitoring and easy automation, and has become one of the main ways of aircraft paint removal. In this paper, the main methods and mechanisms of laser paint removal technology were analyzed. Secondly, the influence of process parameters on the laser paint removal effect of aircraft skin was summarized, and the design idea of engineering laser paint removal process parameters was proposed. The effectiveness of the design idea was verified by the result of the paint removal of the metal skin of an aircraft. The evaluation methods of laser paint removal effect and the existing technical standards were introduced. Finally, the application examples of laser paint removal for aircraft skin were summarized, and the future research direction and emphasis of laser paint removal technology were prospected.
2023, 52(2): 20220753.
doi: 10.3788/IRLA20220753
With the continuous transformation and upgrading of China's industry, higher requirements have been put forward for the quality, efficiency and service of industrial cleaning. The traditional cleaning methods cannot meet the application needs of industrial fields due to its high pollution, high energy consumption and other defects. As a green, environmentally friendly and non-destructive new cleaning method, laser cleaning has rapidly become a hotspot technology in the field of industrial cleaning. This paper presents three typical laser cleaning methods and summarizes the relevant mechanism of laser cleaning. At the same time, the application progress of laser cleaning in aerospace, shipbuilding, rail transit and other fields is also stated. According to the scientific and technological achievements of the enterprises and institutions of higher learning in laser cleaning systems and equipment at home and abroad in recent years, the difficulties in the promotion and application of laser cleaning in China are put forward, and the development direction of laser cleaning technology in the future is prospected.
