First of all, the ultrasonic generator converts the AC power supply into the ultrasonic frequency power supply, whose frequency range is generally 16khz-68khz, up to 1000khz. Then, the power supply is transmitted to the transducer through the cable. The ultrasonic transducer is often composed of several sound heads in parallel to form an acoustic array, where the electrical energy is converted into mechanical vibration energy with the same frequency and transmitted to the cleaning water tank, The ultrasonic sound field of back and forth vibration is formed in the cleaning fluid. In the ultrasonic sound field, because the liquid around the negative pressure area has no time to replenish, countless tiny vacuum bubbles are formed. When the positive pressure comes, the tiny bubbles suddenly close under pressure, and the violent collision between liquids produces a huge shock wave, which can form thousands to tens of thousands of atmospheric pressure and instantaneous high temperature. This is the "cavitation" effect of ultrasonic. Cavitation has a very good cleaning and emulsifying effect, so that the oil from the surface of the cleaning workpiece, so as to achieve the purpose of fast and clean cleaning.