Ultrasonic welding

After a general introduction and a description of the apparatus a survey is given of the variables involved in ultrasonic welding, in particular the pressure, the power and the welding time, and also their mutual dependence. It is shown that the physical properties, and the dimensions and the state of the surface of the materials under test also play an important role. Most measurements have been carried out on aluminium and copper. There is not enough data available to give a detailed explanation of the mechanism of ultrasonic welding. When the welding conditions are known, however, a reproducible weld can be obtained. These investigations have been confined to metal welding