Ultrasonic cleaning is based on cavitation, that is, countless bubbles in the cleaning fluid rapidly formed and quickly imploded. The resulting impact will be immersed in the cleaning fluid of the workpiece inside and outside the surface of the dirt peeled off. With the increase of ultrasonic frequency, the number of bubbles increases and the burst impact force decreases. Therefore, high-frequency ultrasonic is especially suitable for cleaning small particles of dirt without damaging the surface of the workpiece.
Cavitation: cavitation is the ultrasound to more than 20,000 times per second compression and pressure reduction interaction of high-frequency transformation to the liquid transmission. When the pressure is reduced, the vacuum nuclear group bubble appears in the liquid, and when the pressure is applied, the vacuum nuclear group bubble produces a strong impact force when it is pressed and crushed, thus stripping the dirt on the surface of the cleaned object, thus achieving the goal of precision cleaning. Direct inflow: the phenomenon of ultrasonic waves flowing in a liquid in the direction of sound propagation is called a direct inflow. When the acoustic intensity is 0.5 W/CM2, the direct inflow can be seen by the naked eye, and the flow velocity is about 10 cm/s perpendicular to the vibrating surface. Through this direct flow, the micro-oil dirt on the surface of the cleaned object is stirred, and the cleaning fluid on the surface of the dirt also produces convection. The solution of the dissolved dirt is mixed with the new solution so that the dissolving speed is accelerated, it plays an important role in the removal of dirt.
Acceleration: acceleration produced by the propulsion of liquid particles. For the high-frequency ultrasonic cleaning machine, cavitation is not significant, then the cleaning mainly by liquid particles under the action of ultrasonic acceleration of particles to clean dirt ultra-precision.
Acceleration: acceleration produced by the propulsion of liquid particles. For the high-frequency ultrasonic cleaning machine, cavitation is not significant, then the cleaning mainly by liquid particles under the action of ultrasonic acceleration of particles to clean dirt ultra-precision.
The ultrasonic cleaning method exceeds the conventional cleaning methods, especially since the surface of the workpiece is more complex, such as some uneven surfaces, there are blind holes in the mechanical parts, and some products are especially small and require high cleanliness. Such as Clocks and precision machinery parts, electronic components, and circuit board components, such as the use of ultrasonic cleaning can achieve very good results. The principle of ultrasonic cleaning is that the high-frequency oscillating signal from the ultrasonic generator is transmitted to the medium-cleaning solvent through the conversion of the transducer into the high-frequency mechanical oscillating signal, causing the liquid to flow and produce tens of thousands of tiny bubbles. These bubbles form and grow in the negative pressure region of ultrasonic longitudinal propagation, and quickly close in the positive pressure region. In a process known as“Cavitation,” the bubbles close, creating an instantaneous high pressure of more than 1,000 atmospheres, continuous instantaneous high pressure as a series of small“Explosions” constantly impact the surface of the object, so that the surface of the object and the cracks in the rapid exfoliation of dirt, to achieve the object surface purification.
Compared with many other cleaning methods, ultrasonic cleaning has the following advantages: good cleaning effect, high cleanliness, and consistent cleanliness of all workpieces; It can clean the deep hole, the thin seam, and the concealed place of the workpiece, and has no damage to the surface of the workpiece. Because the ultrasonic wave cleaning speed is fast, the quality is good, also can reduce environmental pollution greatly. Therefore, ultrasonic cleaning technology is being applied in more and more industrial sectors.
In the professional and group production enterprises, ultrasonic cleaning machine has gradually replaced the traditional soaking, scrubbing, pressure washing, vibration cleaning, steam cleaning, etc., the high efficiency and cleanliness of the ultrasonic cleaning machine, thanks to the penetration and cavitation impact of its sound waves as they travel through the medium, makes it easy to clean parts with complex shapes, cavities and fine voids, the process of oil removal, rust prevention, and phosphating can be completed in just two or three minutes under Sonication. The speed can be increased several times, even tens of times, compared with traditional methods. The cleanliness can also reach high standards, this highlights the difficult or irreplaceable results that can not be achieved by other treatment methods in many situations where surface quality and productivity of the product are required to be high.
