Ultrasonic welding is based on high-frequency vibrations (typically between 20 and 40 kHz) that cause surface friction and viscoelastic heating at the weld. The most important process parameters are ...

Figure 1. Direct ultrasonic welding. Figure 2. Staking onto thermoplastics. Figure 3. Insertion/fixation of metal element onto thermoplastics. Ultrasonic joining in plastics and polymer materials is ...

Processes include friction welding methods (vibration and rotation welding), ultrasonic welding, microwave welding, high-frequency welding, hot-plate welding and laser welding. The method best ...

Continuous ultrasonic welding was used to weld the stringers to the in-situ solidified thermoplastic aircraft skin - a world first. The resistance welding process, which was further developed by DLR ...