the transducer in the ultrasonic cleaner converts high-frequency oscillating electrical signals into high-frequency mechanical oscillations and radiates them in the cleaning solution in the form of longitudinal waves. During the half-wave period of radiation wave expansion, the compactness of the cleaning solution is destroyed and countless bubbles with diameters ranging from 50 to 500 meters are formed. This kind of bubble is filled with solution vapor. During the half-wave period of compression, the bubbles close rapidly, resulting in partial hydraulic impacts of over a hundred Mpa. This phenomenon is called cavitation effect. Under the continuous effect of cavitation, the dirt on the surface of the workpiece or in the concealed areas is cracked and peeled off. Under the effect of ultrasonic waves, the penetration effect of the cleaning solution is enhanced. Pulsating stirring intensifies; The dissolution, dispersion and emulsification are accelerated; Then thoroughly clean the workpiece.