Good User Reputation for Hand Held Welding Machine - 20Khz 2000w Ultrasonic Vibrator with high quality transducer for nonwoven welding – Powersonic

20Khz Ultrasonic Vibrator with high quality transducer for nonwoven welding

Transducer Parameter

Description

Ultrasonic vibrator is a kind of device, also called ultrasonic vibrator. The whole connected with transducer and horn is called 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 is amplified by the front and rear radiation cover blocks that match the acoustic impedance.
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 to 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.
When the horn performs longitudinal expansion and contraction vibration, the movement directions of the mass points on the left and right sides of a certain cross section in the middle are just opposite, which is equivalent to the existence of a relatively static nodal plane. This nodal surface is called a node, which is also the best fixed point of the vibrator. Deviation from the fixed node of this node will reduce the working efficiency of the vibrator, commonly known as leaky wave.

Commonly used materials

1. Aluminum horns have high sound transmission efficiency, but the material strength is low, easy to crack and threaded holes
2. The steel horn has high strength, but the acoustic impedance is relatively large
3. Titanium alloy horns have good overall performance, but the disadvantages are high price and difficult processing.

Principle

Ultrasonic transducers are widely used. According to the application industries, they are divided into industry, agriculture, transportation, life, medical treatment and military. According to the realized functions, it is divided into ultrasonic processing, ultrasonic cleaning, ultrasonic detection, detection, monitoring, telemetry, remote control, etc.; according to the working environment, it is divided into liquid, gas, biological body, etc.; according to the nature, it is divided into power ultrasonic, detection ultrasonic, ultrasonic imaging, etc. .

The audio frequency electrical signal higher than 28KHZ generated by the ultrasonic generator is converted into the mechanical oscillation of the same frequency through the piezoelectric inverse effect of the transducer, and radiated in the cleaning liquid in the form of ultrasonic longitudinal wave. Due to the alternating positive pressure and negative pressure of the ultrasonic longitudinal wave propagation, countless tiny bubbles of more than 1000 atmospheres are generated and blasted at any time, forming a small local high-pressure bombardment on the surface of the cleaning object, so that the dirt on the surface of the object and the gap can be quickly peeled off. This is the unique “cavitation effect” of ultrasonic cleaning. Definition of ultrasonic vibrator

Ultrasonic vibrator is also called ultrasonic vibrator. In the industry, the whole connection between 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 is amplified by the front and rear radiation cover blocks that match the acoustic impedance.