As a rule the parts to be welded do not have to be pre-treated. The parts turned towards the welding tool must not be too thick or too heavy, otherwise there is no relative movement. In the case of aluminium sheet the maximum thickness is approx. 2mm, apart from this there is no limit. The conventional ultrasonic metal welding process, either on a continual basis for longitudinal seams (with rotating sonotrode) or linear, for round, square or rectangle spot welds, has many possible applications today, particularly in the electronics sector.
The linear ultrasonic metal welding process is also suitable for ring welds with relatively small diameters.