Knowledge | 2022-05-23
Some instructions on the ultrasonic cleaning process
The ultrasonic cleaning process is the most common in-tank immersion. Therefore, for large components, high-power ultrasonic cleaning devices are required. The high-power ultrasonic cleaning device is generally not easy to be equipped with. Therefore, some large components are used to use local cleaning methods. The transducers of the ultrasonic cleaning device will be designed according to the shape and local cleaning parts of the large component. The energy device meets the shape requirements of the component to achieve local ultrasonic cleaning. There is also a universal ultrasonic cleaning device. The ultrasonic frequency used is fixed, but for special components, it can be equipped with a multi-frequency ultrasonic cleaning device. The shape and cleaning requirements required by the part can be adjusted to the ultrasonic cleaning frequency.
Local cleaning and multi-frequency cleaning in the above ultrasonic cleaning process depends on the geometric shape, size, and cleaning requirements of the components. The universal ultrasonic cleaning process is still in slot cleaning. Ultrasonic cleaning is a complex process, which has both the effect of ultrasonic fields and the physical and chemical effects of cleaning liquid. Therefore, the effects of various parameters in the process of ultrasonic cleaning on the cleaning effect are the result of a composite effect. In various parameters, the main parameters are ultrasonic power, ultrasonic frequency, and the temperature of the cleaning fluid.
In the ultrasonic cleaning process, the location of the cleaning part in the cleaning slot is worth noting. It has a considerable effect on improving the cleaning effect and ensuring the normal use of ultrasound cleaning devices. Generally, a large component of large weight should be avoided directly to the bottom of the cleaning tank, causing the cleaning slot to not vibrate, so that the ultrasonic cleaning device cannot reach normal work. The components should be fixed on the dedicated tools in the normal tools of the cleaning tank, and they are hung upside down in the cleaning tank. The large components should not be in contact with the bottom or wall of the cleaning tank. At the same time Source, this can achieve a good cleaning effect.
Ultrasonic cleaning is particularly suitable for small precision parts. Machining accuracy and high surface rough parts. After polishing and grinding, polishing paste and grinding paste residual on the surface of the parts are used by ultrasonic cleaning and chemical water cleaning liquid. This can achieve a good cleaning effect. The components that are cleaned by ultrasonic should be resolved first, otherwise, the residual iron dander should not be easily eliminated.
In the best working case during ultrasonic cleaning, the output impedance of the ultrasonic generator is equal to the dynamic impedance of the converter. At this time, the ultrasonic generator has the largest electrical power to pass to the transducer, so the ultrasonic power converted by the transducer is also the largest. The adjustment of the ultrasonic cleaning device during the use process is mainly to adjust the frequency knob of the generator.This can make the frequency of the output signal consistent with the inherent resonance frequency of the converter. The small air bubbles are rolling, which produces the phenomenon of upper and lower streaming, which is similar to the boiling water. At this time, it feels like it is stitched into the probe.
There are many ways to check the quality of ultrasonic cleaning. In summary, there are two main categories: one is estimated to be cavitation intensity. This category includes the aluminum foil method, which can estimate the strength of the amortization intensity. As well as the verification method -measuring the noise. The other is a method that directly estimates the quality of components, which includes the degree of dirt on the estimated components and the degree of cleaning after washing. Generally, there are many categories.
In the process of ultrasonic cleaning, adjust the temperature of the cleaning liquid and accurately control the main parameters of the cleaning process. The cleaning tank can have a sandwich tank body. In the interlayer, there is a cooling circulation flow to take away the heat from the ultrasonic radiation. And the cooling water flow is adjusted to control the temperature of the cleaning liquid.