The basic principle of ultrasonic assembly involves conversion of high frequency electrical energy to high frequency mechanical energy in the form of reciprocating vertical motion which,when applied to a thermoplastic,generates frictional heat at the plastic /plastic or plastic /metal interface.In ultrasonic welding , this frictional heat melts the plastic,allowing the two surfaces to fuse together.

Super Ultrasonics assembly systems are generally composed of the following major elements: a Generator,Transducer(Converter),Cone(Booster),Horn(Sonotrode),and holding fixtures(Nest).