Production Introduction
Laser cleaning technology refers to the use of high-energy laser beams to irradiate the surface of the workpiece to make the dirt, rust or coating on the surface evaporate or peel instantly, so as to achieve a clean process. The mechanism of laser cleaning is mainly based on the fact that contaminants on the surface of the object absorb the laser energy, either vaporize or evaporate, or instantly expand by heat to overcome the adsorption force of the particles on the surface and make them detach from the surface of the object, thereby achieving the purpose of cleaning. To sum up, it roughly includes four aspects: laser vaporization and decomposition, laser peeling, thermal expansion of dirt particles, substrate surface vibration and particle vibration; and laser cleaning is often the result of multiple mechanisms acting simultaneously. The mechanism of laser cleaning varies according to the difference between the surface attachments and the thermal physical parameters of the substrate. When the thermal physical parameters of the surface attachment and the matrix material are quite different, the laser cleaning mechanism includes: ablation vaporization, thermal vibration and thermal shock mechanism, and acoustic vibration mechanism, such as laser cleaning paint and rubber layers. When the thermophysical parameters of the surface attachment and the base material are not much different, the main ablation vaporization mechanism is at work, such as laser rust removal.