VIEW ISO 9000 CERTIFICATE

APPLICATIONS OF THE LINEAR ULTRASONIC METAL WELDING PROCESS

The process in particular can be used where other welding methods fail or are uneconomic. Contrary to other welding processes, different types of materials can be bonded, as long as their hardness differences are not too great. Excellent results are possible with pure aluminium and copper. These metals can be bonded not only to themselves but also to many other metals, e.g. gold, silver, silicon, nickel etc. As a rule the parts to be welded do not have to be pre-treated. The part 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.2 mm, otherwise there is no limit.

The conventional ultrasonic metal welding process, either on a continual basis for welding longitudinal seams (with rotating sonotrode) or linear, for round, square or rectangular spot welds, has broad applications today, particularly in the electronics sector. The linear ultrasonic metal welding process is also suitable for ring welds with relatively small diameters. However, once the welds become larger than about 8 mm, parallelism tolerances, but above all amplitude differences, have a negative effect on weld quality along the ring weld face. The amplitude differences which are unavoidable, because of the weld tool construction and as a result of the vibration boundary conditions, limit the applications of linear ultrasonic metal welding in the area of ring welds.

Welding || Metal welding || Techniques || Advantages || Continous Welding
Applications || Torsional welding || Ring welding