Metal welding is used in the automotive and electronics industries to produce batteries, cable connections, etc. In metal welding, metals are welded in high temperatures, for instance. We differentiate between metal active gas (MAG) and metal inert gas (MIG) welding. Active gases form a connection with the metal, inert gases do not.
Ultrasonic welding, on the other hand, uses ultrasonic waves to join the metals. The ultrasonic welding of metals is a cold welding process, as barely any heat is generated apart from at the weld spot. At this point, high-frequency sound waves are introduced to the parts being welded. Precise tools make it possible to retain a consistent quality during each weld process, and to have reproducible results each time.
More information:
https://www.herrmannultraschall.com/en/welding-using-ultrasonics/metal-welding
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