The cleaning of the engine cylinder head and other parts of the ultrasonic cleaning machine is a difficult problem. Because the inner cavity of this kind of parts is more complex, the internal iron and sticky sand and other sundries are difficult to remove, so the cleaning degree is very uneasy and often super poor.
In the aspects of the cleaning degree of the cylinder head, many measures have been taken, such as strengthening the dandruff of the finishing positions, improving the capacity of the existing cleaning equipment, reducing the circulation cycle of the work pieces, and adding manual arrangement, and still have not reached the effect of aspirations, and finally the traditional soaking technology has to be completed. Soaking about a small batch of production can still be, but for large batch production, because of long cleaning time, production beat can not be satisfied, so the cost will be added.
To solve the problem of cleaning degree thoroughly, it is necessary to select new skills and equipment. Nowadays, many companies make use of ultrasonic cleaning equipment to wash. The following are the principles and applications of ultrasonic cleaning technology.
The ultrasonic wave conveyed in the liquid can clean the surface of the object. The principle can be explained by the "cavitation" scene. The cleaning effect and the ultrasonic intensity of the "cavitation" occurring in the liquid are closely related. The ultrasonic wave conveys the ultrasonic wave in the liquid. When the acoustic pressure reaches a atmospheric pressure, the power density of the ultrasonic wave is about 0.35W/cm2, then the peak of the ultrasonic wave pressure in the liquid can easily reach the vacuum or negative pressure; but in fact, there is no negative pressure scene, and thus occurs in the liquid. A large force is made to crack the liquid molecule into an empty (cavitation core), which is vacuum or very close to the vacuum, which reaches the maximum at 1.5 weeks under the signal voltage (or ultrasonic pressure) value.
It is crushed by the increase of the surrounding pressure. At this time, the liquid molecules knock out a very strong impact, and the ultrasonic cleaning machine will be hit by the dirt that is cleaned by the surface of the object, and the shock waves of these fine and dense bubbles are called "cavitation" effect. The cavitation effect is very easy to occur at the junction of solid and liquid, so that the object in the liquid under the effect of immersion ultrasound has an extraordinary cleaning effect. In addition, because the ultrasonic has a strong penetration of the solid, it can penetrate the surface of the other side of the cleaned material, and the inner cavity, blind hole and slit of the medium, which will drop the dirt on the surface of the cleaning material and reach the perfect cleaning effect.
At the same time, the ultrasonic cleaning machine has the effect of ultrasonic neutralization and neutralization, which can be more useful to avoid cleaning the oil from the surface of the cleaned object. So this "cavitation" effect on the liquid immersed in the ultrasonic effect of the surface of the body surface (such as pipes, box parts) can be cleaned, which is an important aspect of ultrasonic cleaning better than other methods of cleaning.