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     At present, in some ultrasonic cleaning machines, the transducers attached to the bottom or wall of the cleaning tank are too densely distributed, and they are arranged next to one another. The power intensity of the input transducer reaches 2-3 watts per square centimeter. On the one hand, such high intensity will accelerate the cavitation corrosion of the surface of the stainless steel plate (the surface in contact with the cleaning liquid) and shorten the service life. On the other hand, due to the sound intensity too high. A large number of large bubbles will be generated near the surface of the steel plate, increasing the sound transmission loss and weakening the cleaning effect away from the transducer. Generally, it is advisable to choose the power intensity of less than 1.5 watts per square centimeter (calculated according to the area of the steel plate with the transducer attached). If the cleaning tank is deep, in addition to the transducer attached to the bottom of the tank, the transducer should also be attached to the tank wall, or only on both sides of the tank body.

     The bonding quality of the transducer and the cleaning tank has a great influence on the quality of the ultrasonic cleaning machine. It is not only necessary to stick firmly, but also requires the adhesive layer to be uniform, not lack of glue and not allowed to have cracks, so that the ultrasonic energy can be transmitted to the cleaning solution to the maximum extent, so as to improve the efficiency of the whole machine and the cleaning effect. Some cleaning equipment is currently used to prevent the transducer from falling out of the cleaning tank. The fixing method of screw and glue is adopted. This connection method can prevent the transducer from falling off. But pay attention to the quality of screw welding. If it is not perpendicular to the surface of the stainless steel plate, the adhesive layer will be uneven, and even there will be cracks or lack of glue, and the energy transmission will be weakened; on the other hand. If the welding is not good, it will also affect the smoothness of the stainless steel surface, resulting in accelerated cavitation corrosion and shortening the service life, so the welding quality is very important.

    One of the ways to judge the bonding quality is to measure the temperature rise of the transducer after the cleaning tank is filled with water and turned on for a period of time. If the temperature of a transducer in many transducers rises very fast, it indicates that the transducer may be poorly bonded. Because the sound radiation is not good at this time, most of the electrical energy is consumed on the transducer and generates heat. Another method is to measure the electrical impedance of the transducers one by one under small signal conditions to determine the bond quality.