Ultrasonic Oscillator for Welding

The Ultrasonic Oscillator for Welding is similar to the cleaning transducer in principle, but it also offsets the expansion stress of piezoelectric ceramics by applying prestress to achieve large-scale high-frequency vibration. Because the welding transducer requires large instantaneous power, it has high requirements for materials and processes, because it is a high-power acoustic super energy device. It usually combines with horn and working head to form a high-power and large amplitude vibration system to complete the ultrasonic welding of plastics, metals and other materials.

Ultrasonic welding is the ultrasonic vibration generated by the transducer, which generates high-frequency friction and heat generation on the surface of the welded object contacting the gap under pressure, so as to achieve the purpose of hot-melt welding.Ultrasonic welding transducers are high-power transducers that work in gaps or pulses, and their power is generally calculated based on the instantaneous peak power.

Ultrasonic oscillator for welding is a kind of piezoelectric ceramics that resonates with ultrasonic frequency. It converts electrical signals into mechanical vibration through the piezoelectric effect of materials. The interior usually contains an electrical storage element and a mechanical vibration system. When the sensor is used as a transmitter, the electrical oscillation signal from the excitation power supply will cause the CLP energy storage element of the sensor to change in the electric or magnetic field. The influence of this change is that some people generate driving force on the sensor of the mechanical vibration system to make it enter the vibration state, so as to promote the contact with the medium of the mechanical vibration of the frequency converter and the vibration reduction system, and make the sound wave radiate in the medium. The process of receiving sound waves is the opposite process of suppressing the vibration of the transducer. Therefore, the transducer vibration and mechanical vibration system make the energy storage element of the transducer change correspondingly in the electric or magnetic field with the help of certain physical effects, which will lead to the electrical output of the sensor to produce voltage and current corresponding to the acoustic signal voltage and current.

FAQ

Q: What about the main feature on ultrasonic oscillator for welding ?

Ultrasonic transducer is the high-frequency mechanical vibration source and function of ultrasonic welding machine. It converts the electric energy or magnetic energy output by ultrasonic generator into mechanical vibration of the same frequency. At present, there are two kinds of transducers used in ultrasonic welding machines, one is magnetostrictive transducer, the other is piezoelectric ceramic transducer

Due to the low efficiency and low cost performance of magnetostrictive transducers, and the need to add a DC polarized magnetic field, ultrasonic welding machines have been rarely used.

The basic principle of piezoelectric ceramic transducer is based on the piezoelectric effect of crystal material. This material is piezoelectric crystal material. Ultrasonic welding machine is mainly used for the production of piezoelectric ceramics. When the material deforms in the mature field, the surface of piezoelectric crystal will generate charges, and an electric field will be generated inside the crystal. On the contrary, when the crystal is affected by an electric field, the metal will deform. This situation is called piezoelectric effect, and the former is called positive effect or negative effect.

Q: Precautions for the installation of our company's transducer:

1. Select appropriate materials and adjust the hardness process to process and produce horns and working heads.

2. When installing the horn or working head, be sure to pay attention to frequency matching, and apply sound-guiding glue to the joint.

3. Use solvents such as acetone to clean the surface to be joined during installation. .

4. Establish the impedance control process of the bonding process to reduce the bonding impedance of the vibrator and improve the electro-acoustic conversion efficiency of the vibrator.

5. Pay attention to improving the insulation measures after the vibrator electrode is installed.

For more details of Ultrasonic Oscillator for Welding, please feel free to contact us