What is the difference between laser cleaning and ultrasonic cleaning?
Ultrasonic cleaning is to use the cavitation, acceleration and direct flow of ultrasonic waves in the liquid to directly and indirectly affect the liquid and dirt, so that the dirt layer is dispersed, emulsified, and peeled off, so as to achieve the purpose of cleaning. At present, ultrasonic cleaning, cavitation and direct current in traditional cleaning methods are widely used. What is the difference between laser cleaning and ultrasonic cleaning?
The ultrasonic cleaning machine uses the alternating frequency signal sent by the ultrasonic generator, which is converted into the mechanical oscillation of the alternating frequency by the transducer and propagated to the medium-cleaning liquid. Strong ultrasonic waves are dispersed in the cleaning solution in the form of a dense dense phase. Clean the object for radiation. The phenomenon of "cavitation" occurs, that is, the formation of "air bubbles" in the cleaning fluid, causing rupture. When the "cavitation" reaches the moment when the surface of the object to be washed is broken, it will generate an impact force far exceeding 1000 atmospheres, causing the dirt on the surface, holes, and crevices of the object to scatter, crack and peel off, so that the object can be purified and cleaned.
Laser cleaning technology refers to the use of high-energy laser beams to irradiate the surface of the workpiece, so that the surface dirt, rust spots or coatings are evaporated or peeled off instantly, and the surface attachments or surface coatings of the cleaning objects are effectively removed at high speed, so as to achieve a clean process. It is a new technology based on the interaction effect between laser and materials. Compared with traditional cleaning methods such as traditional mechanical cleaning methods, chemical corrosion cleaning, liquid-solid strong impact cleaning, and high-frequency ultrasonic cleaning, it has obvious advantages.
Ultrasonic cleaning does require a medium such as water or detergent. The higher the power density of the ultrasonic wave, the stronger the cavitation effect, the faster the speed, and the better the cleaning effect. However, for precision objects with very high surface finish, long-term cleaning with high power density will cause cavitation and corrode the surface of the object. Use 50 °C~70°C working temperature.
The advantage of the handheld laser cleaning machine is that it does not come into contact with the cleaning material. The ultrasonic cleaning method is close-range cleaning. There is mechanical force on the surface of the cleaning object, which is easy to damage the surface of the object. Laser cleaning is a non-contact process that can be conveniently operated from a distance.
Compared with traditional cleaning methods such as ultrasonic cleaning and chemical corrosion cleaning, laser cleaning has obvious advantages. It is efficient, fast, low-cost, and has low thermal and mechanical loads on the substrate. The cleaning is non-destructive; it does not endanger the health of the operator; the cleaning process is easy to realize automatic control and remote cleaning.
