The principle of ultrasonic welding

The ultrasonic generator generates the signal frequency required by the ultrasonic transducer, and then uses the thermoplasticity of the plastic to generate heat at a very high speed between the molecules by using high-frequency friction between the working surfaces. When the heat is sufficient to melt, the ultrasonic wave is stopped. Vibration, at this time the workpiece joint is solidified by melting, complete the processing procedure! The traditional ultrasonic generator is manually frequency-modulated, and HZ-2000 digital ultrasonic generator realizes automatic frequency tracking, real-time power display, and friendly communication of human-machine interface!

The frequencies commonly used for plastic processing are 15 kHz and 20 kHz, of which 20 kHz is outside the human hearing range, so it is called ultrasonic, but 15 kHz is still in the human hearing range.

What is an ultrasonic welder?

Ultrasonic welding (USW) is a solid-state welding process that produces a weld by local application of high-frequency vibratory energy while the work pieces are held together under pressure. ⁵. A sound metallurgical bond is produced without melting the base material.

How does ultrasonic welding machine work?

The vibrations, produced by a welding sonotrode or horn, as it is generally known, are used to soften or melt the thermoplastic material at the joint line. The components to be joined are held together under pressure and subjected to vibrations, usually at a frequency of 20 or 40 kHz.

Where is ultrasonic welding used?

Ultrasonic welding is used in almost all major industries like automotive, electronic and appliances, medical, packaging etc. A limitation of ultrasonic welding is that with current technology, large joints cannot be welded in a single operation. In addition, specifically designed joint details are required.

◆ Real-time frequency automatic tracking display;

◆ Welding mode: time, energy

◆Amplitude stepping function;

◆Welding amplitude 10-100 adjustable (1% accuracy)

◆Amplitude compensation

◆Mold impedance analysis + protection

◆Overload protection;

◆Quality management (time, energy mutual detection)

◆ welding record (operation statistics);

◆ powerful, high quality, high welding stability