The frequency of an ultrasonic wave on a single-groove industrial ultrasonic cleaning machine is generally more than 28KHz. High up to 128 kHz above, the commonly used is 40 kHz, this frequency is more general and suitable for most workpiece cleaning. The lower the frequency, the lower the degree of fineness of cleaning, but the intensity will be stronger. Conversely, the more fine cleaning, the intensity will be reduced. Then this frequency through the transducer, also known as ultrasonic drive power, electronic box, or ultrasonic controller, is an important part of a high-power ultrasonic system. Driven by high-frequency ultrasonic waves, the transducer vibrates hundreds of thousands of times per second. This vibration is transmitted to a cleaning tank fastened to it. Through which kinetic energy is transferred to the liquid in the tank. At this high frequency of vibration, the liquid will produce cavitation.
Is an ultrasonic cleaning machine suitable for the electroplating industry?
At present, the electroplating industry is not familiar with the practical application of ultrasonic cleaning machines, electroplating, and pre-treatment to remove the dirt and impurities on the surface of the workpiece, so that it becomes a suitable plating active surface. The reason for poor electroplating quality is poor pre-treatment. And the pre-treatment is not good, and most of the non-use of ultrasonic cleaning equipment.
The ultrasonic frequency is generally between 20-100 kHz. Common workpiece pre-processing, generally using low-frequency, medium-power ultrasonic cleaning equipment, such as frequency 25-28 kHz, power density 1W/cm.
Due to the low frequency than the high frequency in the medium easily cavitation, for the shape of a simple, not very precise, the precision of workpiece, this kind of cleaner can meet the requirements. It is characterized by high noise and low prices. For some precision, a higher density of the workpiece is generally used for a high-frequency 40-68KHZ high-power ultrasonic cleaning machine. Therefore, the kind of cleaning machine for the gap, Gap, deep hole, blind hole, and other complex appearances of the workpiece cleaning effect is better. But the role of ultrasonic cleaning is only a solution to reach the place to play a cleaning role. That is to say, to avoid deep holes, and blind holes in the air, and to pay attention to impurities landing, oil on the float and disposal cleaning is not in place.
Before electroplating disposal must be based on the actual conditions of the workpiece, and the use of appropriate methods for useful cleaning. The metal substrate is generally divided into stamping parts and die-casting parts. Stamping parts above the oil for the general stamping oil, because its density is relatively high, so relatively easy to clean.
Can use pickling, and electrolysis commonly. The zinc, aluminum, copper, and other die-casting parts are difficult to clean because of the addition of various elements in the die-casting, in addition to molding, lifting, calendering, cutting, and polishing process must also use a variety of oil products, such as motor oil, polishing oil, etc. . For ultrasonic cleaning machine, oil can be easily removed. But polishing oil is divided into butter white oil, green oil, and so on, and this is difficult to remove compared to the past. Therefore, it is necessary to select appropriate ultrasonic cleaning equipment and cleaning fluid.
The workpiece is rinsed after plating, but some more complex work pieces, especially those with gaps, deep holes and blind holes (such as eyeglasses spring legs) can not play an ideal role. Only through the use of ultrasound to remove crevices, deep holes, and blind holes in the remaining plating solution. Generally in this respect can choose the slightly higher frequency, and power density of the general ultrasonic cleaning machine can be.
