What is Ultrasonic Metal Welding?

The process of ultrasonic metal welding uses high-frequency vibrations. Ultrasonic metal welding works by placing the parts to be welded on the anvil.

Next, force is applied to the parts. Then the upper part is vibrated back and forth with the ultrasonic horn.

This causes the parts to rub together. The ultrasonic energy disperses oxide film layers (cleaning the surface) and results in the mixing of metal atoms, without melting the metals. The activated metal atoms join each other, causing a true metallurgical bond.

Ultrasonic metal welding is sometimes called "cold welding" because it works without melting the metals. It cleans and welds at temperatures lower than the melting point of the metals. It most commonly joins nonferrous metals, but can also be used with others, such as when welding aluminum to ceramics.