What kind of welding is ultrasonic welding?

Ultrasonic welding belongs to pressure welding.

Ultrasonic welding is a kind of pressure welding. There are five kinds of pressure welding, including butt welding, roll welding, point projection welding and diffusion welding. The other four pressure welding methods are collectively called resistance welding. Ultrasonic welding uses the mechanical vibration of ultrasonic waves to generate high-frequency vibration and friction on the joint surface of the weldment, and then generates heat energy, which makes the temperature of the joint surface rise rapidly, and the substances on the joint surface melt at high temperature to form liquid, which flows into the gaps between the welding surfaces.

After the ultrasonic vibration stops, the welding system continues to apply pressure with a specific intensity and time, and the welding surface is shaped by the link of atomic bonds. Compared with the common welding method, the ultrasonic welding process greatly shortens the time, and the welding firmness is much higher than the common welding method. Ultrasonic welding can be applied to metals and plastics to achieve fast and high quality welding.

Application method of ultrasonic welding

1, welding method?

Under moderate pressure, the ultrasonic ultra-high frequency vibration of the welding head makes the joint surface of two plastics generate friction heat and instantly melt and combine, and the welding strength can be comparable to that of the body. By adopting suitable workpieces and reasonable interface design, water tightness and air tightness can be achieved, and the inconvenience caused by using auxiliary materials can be avoided, thus achieving efficient and clean welding. ?

2. Riveting method?

Ultrasonic ultra-high frequency vibration welding head is pressed on the protruding tip of plastic products, which instantly heats up and melts into the shape of rivets, and materials of different materials are mechanically riveted together.

3. Embedding?

With the conduction of welding head and proper pressure, metal parts (such as nuts, screws, etc. ) can be instantly squeezed into the reserved plastic hole and fixed at a certain depth. The tension and torsion after completion can be comparable to the strength of traditional molding in the mold, which can avoid the defects of damage of injection mold and slow injection. ?

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