During electroplating, phosphating, spraying, welding, packaging and integrated circuit assembly of industrial products, grease, dust, rust scale, residual solvent, binder and other dirt on the surface must be removed to ensure the quality of the next process. At present, mechanical cleaning, chemical cleaning and ultrasonic cleaning are widely used in the cleaning industry, but their application is greatly limited under the constraints of environmental protection and the requirements of high-precision market.
The mechanical method cannot meet the cleaning requirements of high-definition cleanliness; Chemical cleaning methods are easy to cause environmental pollution, and the cleanliness obtained is also very limited; Especially when the dirt composition is complex, a variety of cleaning agents must be selected for repeated cleaning to meet the requirements of surface cleanliness; Although the ultrasonic cleaning method has good cleaning effect, it is powerless to clean submicron dirt particles. The size of the cleaning tank limits the scope and complexity of the processed parts, and the drying of the workpiece after cleaning is also a difficult problem.
Laser cleaning technology is a new cleaning technology developed rapidly in recent ten years. It is gradually replacing the traditional surface treatment cleaning technology in many fields because of its many advantages. It can adapt to the cleaning of various surface dirt, has little environmental pollution, and can not damage the matrix.
At present, this method has become the supplement and extension of traditional cleaning methods, and has broad application prospects because of its inherent advantages. Compared with the traditional cleaning process, the characteristics of laser cleaning technology are: it is a “dry” cleaning, does not need cleaning solution or other chemical solutions, and the cleanliness is much higher than that of chemical cleaning process; The scope of dirt removal and applicable substrate are very wide.
By adjusting the laser process parameters, the pollutants can be effectively removed and the surface can be restored as new without damaging the substrate surface; Laser cleaning can easily realize automatic operation and reduce labor force; Laser cleaning has high efficiency and saves time; Laser decontamination equipment can be used for a long time with low operation cost; Laser cleaning technology is a “green” cleaning process. The waste eliminated is solid powder, small volume, easy to store, and basically does not pollute the environment.
