Put the oil-stained parts into the oil-removing liquid, and perform the oil-removing process (cleaning the workpiece parts) under the action of an ultrasonic field with a certain frequency. Ultrasonic waves alternately radiate forward in the cleaning liquid to make the liquid flow, producing tens of thousands of tiny bubbles, which vibrate under the action of sound field. The vibration of bubbles will generate high-speed relative motion to scrub the solid surface, forming a shearing force to act on the scale layer on the surface of the object, thus removing the dirt on the object. At the same time, the vibrating bubbles will also enter the gap of the pollution layer, so that the bubbles will drill in and vibrate, and the oil will be emulsified and fall off by itself. Industrial ultrasonic cleaning machine can not remove oil without cleaning agent, because it is only physical stirring, and only with the corresponding cleaning agent can the oil be stripped.
The principle of ultrasonic cleaning machine is to convert the high-frequency oscillation signal sent by ultrasonic generator into high-frequency mechanical oscillation through transducer and spread it to cleaning liquid. Ultrasonic waves radiate forward alternately in the cleaning liquid, making the liquid flow and producing tens of thousands of tiny bubbles, and the tiny bubbles existing in the liquid vibrate under the action of sound field.
It should be noted that the frequency of ultrasonic cleaning is generally within the specified range, because the frequency of ultrasonic determines the strength of shock wave generated by the bursting of cavitation bubbles. The lower the frequency, the more obvious the cavitation effect will be, but the noise will be relatively high. Generally applicable to larger and heavier parts or workpieces with relatively flat surfaces (generally 28khz). The higher the frequency, the weaker the cavitation effect, but the noise is relatively low. Suitable for smaller and more precise parts or removing tiny particles, such as watch parts and electronic crystals with more tortuous and complicated shapes (generally 40khz). For cleaning parts with ultra-small gaps, deep holes and slits, it is best to use high-frequency ultrasonic cleaning instruments (generally above 40kHz).