JYD-3828-ZY2 is the 28khz high power ultrasonic welding transducer.
1.Low calorific value
2. Large output power
3. Small resonance impedance
4. Long working hours
5. High conversion efficiency
Specially processed Ceramic, Mechanically strong with excellent stability.
High energy conversion efficiency with excellent mechanical characteristics.
Low heat loss on high power operation.
Frequency: 28 ±0.3 kHz
Static Capacitance: 3700-4200pF
Operation Power: Max. 500Watt
Connecting screw: 1/2*20 UNF
Notices: one year of warranty and customer services
Q: How does ultrasonic transducer work?
A: The ultrasonic vibrator is composed of an ultrasonic transducer and an ultrasonic horn to form an ultrasonic vibration system. Ultrasonic transducer is a device that can convert high-frequency electric energy into mechanical energy. Ultrasonic horn is a passive device that does not generate vibration. It only changes the amplitude of the vibration input from the ultrasonic transducer and then transmits it. Impedance transformation.
The ultrasonic transducer can generate regular vibration under the excitation of a suitable electric field, and its amplitude is generally about 10 μm. Such amplitude is not enough to directly complete the welding and processing steps. Therefore, the transducer links a properly designed ultrasonic horn, and the amplitude of the ultrasonic wave can be varied within a wide range, as long as the material strength is sufficient, the amplitude can exceed 100μm.
When the ultrasonic horn is longitudinally stretched and vibrated, the movement of the particles on the left and right sides of a cross section in the middle is just opposite, which is equivalent to the existence of a relatively stationary section. This section is called the node, which is also the best fixed point of the vibrator. Deviation from this node will reduce the working efficiency of the vibrator, commonly known as leakage.
The order of influence of welding process parameters is: the input electric power has the greatest influence, the first welding delay time is second, and the welding time is again, the welding effect is the least. There are four kinds of parameters for welding time, which are one welding delay time, one welding time, two welding delay time and secondary welding time.
One welding delay time refers to the upper acoustic pole walking down to the ultrasonic time; one welding time refers to the first ultrasonic welding time; the secondary welding delay time refers to the upper acoustic pole leaving the weldment to walk upward to emit the ultrasonic Time; secondary welding time refers to the second ultrasonic welding time.
One welding mainly inputs vibration energy to the weldment, which causes solid phase fusion of the weldment fitting surface, which has a great influence on the welding quality. If the welding delay time is too long, the welding head (upper sound electrode) of the welding machine is completely pressed down before the ultrasonic wave is emitted. At this time, the shearing force provided by the welding head to the welding piece is insufficient to drive the workpiece to follow the welding head vibration, and the welding piece is Excessive frictional resistance results in a small relative velocity between the weldments, less heat generated by friction, and less effective weld area of the weldment; conversely, the compression force exerted by the weld head on the weldment is not large enough. When the ultrasonic is emitted, it is easy to displace the weldments.
The secondary welding is mainly beneficial to the demolding of the weldment and the acoustic pole, and the degree of influence on the welding quality is relatively light. The change of welding air pressure will lead to the change of static load of welding. If the static load of welding is insufficient, the amount of plastic deformation of the weldment may be insufficient during ultrasonic welding, and it is difficult to form a good welding surface; otherwise, the contact surface between weldments may be There is no relative sliding, and there is still no welding between the weldments. The input electric power is related to the ultrasonic amplitude, and the ultrasonic amplitude refers to the moving distance of the ultrasonic vibration in the vibration direction. The greater the input electrical power, the greater the ultrasonic amplitude and the more energy is input to the weldment. Studies have shown that within a certain amplitude range, the percentage of interface soldering increases with the increase of ultrasonic amplitude.