The following eight elements are necessary for users of ultrasonic cleaning machines. Please read the following carefully:
First , the choice of frequency
Ultrasonic cleaners range in frequency from 28 kHz to 120 kHz . The physical cleaning forces caused by cavitation when using water or water cleaners are clearly beneficial for low frequencies, typically around 28-40 kHz . For parts with small gaps, slits and deep holes, it is better to use high frequency (generally 40 kHz or more), even several hundred kHz . Use 40 kHz for cleaning watch parts . If you use broadband FM cleaning, the effect is better.
Second , the choice of power
The effect of the ultrasonic cleaner is not necessarily proportional to (power × cleaning time), sometimes with low power, and it takes a long time to remove dirt. And if the power reaches a certain value, the dirt is sometimes removed quickly. If the power is too large, the cavitation intensity will be greatly increased, and the cleaning effect will be improved. However, the more precise parts will also have an etch point, which is not worth the loss, and the cavitation at the bottom of the cleaning cylinder is severe, and the water point corrosion is also increased. Large, when using organic solvents such as trichloroethylene, there is basically no problem, but when using water or water-soluble cleaning solution, it is easy to be affected by water spots. If the surface of the vibrating plate has been scratched, cavitation corrosion occurs under the high power. Severe, so choose the ultrasound power according to the actual use.
Third , the choice of cleaning fluid temperature
The most suitable cleaning temperature of the water cleaning solution is 40-60 °C, especially in the case of cold weather, if the cleaning liquid temperature is low, the cavitation effect is poor, and the cleaning effect is also poor. Therefore, some washing machines are wound around the heating cylinder to heat the heating wire for temperature control. When the temperature rises, cavitation is easy to occur, so the cleaning effect is good. When the temperature continues to rise, the gas pressure in the vacuole increases, causing the impact sound pressure to drop, reflecting the multiplication of these two factors.
Fourth , the production of the cleaning basket
When cleaning small parts, the basket is often used, and it is particularly noticeable because the mesh is causing ultrasonic attenuation. It is better to use a mesh of 10 mm or more when the frequency is 28 khz .
V. Determination of the location of the cleaning parts
Generally, the liquid level of the cleaning liquid is preferably more than 100 mm above the surface of the vibrating body . Since the single-frequency cleaning machine is affected by the standing wave field, the amplitude at the node is small, and the amplitude at the amplitude is large, resulting in uneven cleaning. Therefore, the best choice for cleaning items should be placed at the volatility.
Sixth, ultrasonic cleaning machine technology and cleaning fluid selection
Before purchasing the ultrasonic cleaning machine system, the following application analysis should be carried out on the parts to be cleaned: Defining the material composition, structure and quantity of the parts to be washed, and analyzing and clarifying the dirt to be removed, which are all the cleaning methods to be used. Prerequisites for determining whether to apply an aqueous cleaning solution or a solvent. The final cleaning process also requires a cleaning experiment to verify. Only in this way can a proper cleaning system, a well-designed cleaning process and a cleaning solution be provided. Considering the influence of the physical properties of the cleaning solution on ultrasonic cleaning, the vapor pressure, surface tension, viscosity and density should be the most significant factors. Temperature can affect these factors, so it also affects the efficiency of cavitation. Any cleaning system must use a cleaning fluid.
Seven, cleaning parts processing
Another consideration for ultrasonic cleaners is the design of the upper and lower materials of the cleaning member or the tooling in which the cleaning member is placed. When the cleaning parts are in the ultrasonic cleaning tank, the cleaning parts and the cleaning basket must not touch the bottom of the tank. The total cross-sectional area of ​​the cleaning member should not exceed 70% of the cross-sectional area of ​​the ultrasonic bath . Rubber and non-rigid plastics absorb ultrasonic energy, so care should be taken when using such materials for tooling. Insulating cleaning parts should also be given special attention. The tool basket is not designed properly, or the workpiece is too heavy, even though the efficiency of the best ultrasonic cleaning system is greatly reduced. Hooks, shelves and beakers can be used to support the cleaning parts.
"The Seven Must-See Elements of Ultrasonic Cleaning Machine" is provided by Shanghai Bashu. For more information on ultrasonic cleaning machine, please visit: http://
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