What Is A Transducer in Ultrasonic

The ultrasonic converter is a device that converts energy. It is divided into an output converter and an input converter. The output transducer converts electrical energy into sound energy and mechanical energy, while the input converter does the opposite.

The structure of the ultrasonic converter

The ultrasonic transducer consists of a front slab, back slab, piezoelectric ceramic stacks, screw bolt, clamping nut, solid horn, and machining tool.

The booster consists of a main rod or multiple slave rods. The ratio of the two connecting rods of the vario-rod determines the ratio of the vario-rod. For example, if the ratio of the vario-rod is 2:1, then the amplified energy of the vario-rod is twice as much as the original. The booster’s ability to increase the amplitude is attributed to the constant vibration energy across all its cross-sections (excluding propagation loss). Since the energy density is directly proportional to the amplitude squared, a smaller cross-section results in a larger energy density. Consequently, this leads to an amplified amplitude of the booster.What is a transducer

The role of ultrasonic converter

The ultrasonic converter can convert the incoming electrical power into mechanical ( ultrasound) and transmit it. It is usually used in conjunction with a booster. The converter is used to receive and emit energy, and the amplifier rod is used to amplify the emitted energy.

Usually, the frequency of ultrasonic mechanical work is determined by the mechanical resonant frequency of the generator, transducer, and booster, so the frequency of the transducer and the booster need to be the same. In this state, the ultrasonic machinery can operate stably.What is a transducer

Advantages of Ultrasonic Converter

High Frequency Sound Waves

One of the main advantages of ultrasonic transducers is their ability to emit high-frequency sound waves. Its power conversion rate is exceedingly high.


Ultrasonic waves are non-destructive, meaning they do not cause damage to the object being measured or cleaned. This makes them ideal for welding with high-precision requirements.

Choosing the Right Ultrasonic Transducer

Consider frequency and size when selecting an ultrasonic transducer.

The frequency of an ultrasonic converter is the number of vibrations produced by sound waves in the transducer, usually expressed in hertz (Hz). The frequency of the transducer should match the frequency of the application.

The material’s density determines the frequency of a transducer and is inversely related to its thickness. The smaller the thickness of the transducer, the higher the frequency; while the larger the diameter of the transducer, the lower the frequency.

Choose appropriate frequency welding for different welding objects. For example, you should choose a 40hz ultrasonic welding machine when welding precision components.What is a transducer


Ultrasound is widely used in various fields such as life, technology, automobiles, and medical care. Ultrasonic welding is also becoming an excellent choice for welding wire on thermoplastics and metals. KNMTECH offers various types of ultrasonic welding, including metal welding machines, plastic welding machines, and food cutting machines. If you have needs, please contact us. We will provide the most comprehensive pre-sales and after-sales services to help you improve your competitiveness.

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