If ultrasonic waves hit a material (such as plastic), the molecular chains in it will begin to vibrate. Molecules begin to move and rub against each other. This generates energy (i.e. friction heat). For thermoplastics, this causes them to start melting. Ultrasonic welding uses this principle. After a short holding time under additional pressure, various materials (components) are welded at the molecular level in the welding area.
Non ferrous metal ultrasonic welding technology
Aluminum, silver, copper, nickel and other non-ferrous metals are mainly used for ultrasonic welding. Nonferrous Metals refer to all pure metals except iron and alloys containing less than 50% iron (connection of different metals). Ultrasonic welding is not used for pure ferrous metals.
Ultrasonic welding of aluminum and copper
The welding of aluminum and copper is becoming more and more important, especially due to the steady growth of lithium-ion battery market. These are increasingly used as energy storage sources, especially in the electric vehicle industry. Mainly aluminum and copper welding, used for cable and terminal connection in electrical and automotive industries. Highly accurate and reliable welding methods are essential. Ultrasonic welding can do this. Other advantages are short welding time, high energy efficiency and durability of the final product.
