421 Ultrasonic Welding of Metal Sheets

The technique of ultrasonic welding has been successfully applied to metal sheets, which can be welded to other metallic materials such as aluminum and copper etc. Those welding techniques can be considered for possible application where the welding is achieved at a low temperature or by short welding time of a thin surface layer followed by ultrasonic welding. For example, the ultrasonic welding of Cu/Fe could be finished under the condition of amplitude of 30μm of-ultrasonic horn top, welding pressure of 12MPa and required duration of 1.0s. Since the ultrasonic vibration cleans the contact surface, a surface treatment prior to the welding is not necessary.