Ultrasonic waves are transformed into mechanical vibrations through transducers. The characteristics of transducers depend on material selection and manufacturing process. The performance and service life of transducers of the same size and shape are very different. The commonly used high-power ultrasonic transducer is used in ultrasonic plastic welding machine, ultrasonic metal welding machine, various handheld ultrasonic tools, continuous working ultrasonic emulsifier, atomizer, ultrasonic engraving machine and so on. Commonly used products such as 15KHz 20KHz 28KHz 35KHz 40KHz 55KHz 70KHz can also design and produce non-standard transducers according to the special requirements of customers to meet all kinds of needs.The ultrasonic vibrator is also called the ultrasonic vibrator, and the whole after connecting the transducer and the horn is called the vibrator. It is a device that realizes the mutual conversion between electrical energy and mechanical energy (acoustic vibration) by the piezoelectric effect of piezoelectric ceramics, and amplifies the device through the front and rear radiation cover blocks matched with acoustic impedance. [1]
Since the horn is a passive device, it does not produce vibration itself, but transmits the input vibration after changing the amplitude, completing the impedance transformation.
Ultrasonic transducers can produce regular vibration under the excitation of electric field, but the amplitude is generally about 10μm. Such amplitude is not enough to directly complete the welding and processing procedures.
Therefore, after the transducer is connected with a reasonably designed horn, the amplitude of the ultrasonic wave can be changed in a large range, as long as the material strength is sufficient, the amplitude can exceed 100 μm.

Ultrasonic transducer composition:
1. Middle piezoelectric ceramic element 2. Front and rear metal cover 3. Prestressed screw 4. Electrode sheet 5. Insulating tube
This kind of sandwich transducer generates stable ultrasonic waves when the load changes, which is a relatively basic and main method to obtain a power ultrasonic drive source.
According to different designs, the main forms of ultrasonic transducers are:
1. Column type 2. Inverted horn type 3 Steel back cover type 4. Intermediate aluminum sheet type
Mainly applicable to ultrasonic plastic welding machine, ultrasonic plastic welding, ultrasonic metal welding machine, ultrasonic cleaning machine, ultrasonic sonochemical equipment, etc.

Main Features of Ultrasonic welding transducer:

1. High mechanical quality

2. Piezoelectric element offer a high speed of vibration.

3. Having steady output amplitude even the load markedly changed.

4. Extended using temperature, ensuring good amplitude linearity

5. Bolt-on mounting gives the fast, easy installation and high reliability.

6.easy for assembling

7. good heat resistance

8. large range of working temperature

9.low resonance impedance and heat productivity

10.good construction

11.fastened by bolt