How to choose the frequency of ultrasonic cleaning machine

The ultrasonic cavitation threshold is closely related to the frequency of ultrasonic waves. The higher the frequency, the higher the cavitation valve. In other words, the lower the frequency, the easier it is to generate cavitation, and the compression and thinning of the liquid at low frequencies have a longer time interval, so that the bubbles can grow to a larger size before collapsing, increasing the altitude. The chemical strength is beneficial to the cleaning effect.

Therefore, low-frequency ultrasonic cleaning is suitable for occasions where the surface of large parts or the dirt and the surface of the cleaning part are highly bonded. However, it is easy to corrode the surface of the cleaning parts, it is not suitable for cleaning parts with high surface finish, and the cavitation noise is large. At a frequency of about 40KHZ, under the same sound intensity, more cavitation bubbles are generated than when the frequency is 20KHZ, and the penetrating power is strong. It is suitable to clean workpieces with complex surface shapes or blind holes. The chemical strength is low, and it is suitable for occasions where the bonding force between the cleaning dirt and the surface of the cleaned part is weak. High-frequency ultrasonic cleaning is suitable for fine cleaning of computers and microelectronic components; megahertz ultrasonic cleaning is suitable for cleaning integrated circuit chips, silicon wafers and wave films, which can remove micron and sub-micron dirt without any damage to the cleaning parts. Therefore, considering the cleaning effect and economy, the frequency is generally selected in the range of 20130KHZ. Of course, the correct selection of the frequency is very important, and the selection of the specific and suitable working frequency needs to be obtained through certain experiments.