Welding characteristics of ultrasonic seam welding system using a complex vibration circular disk welding tip

The continuous welding characteristics of a 27 kHz ultrasonic seam welding system using a complex vibration circular disk welding tip are studied. The vibration characteristics of a complex vibration converter were improved c ompared with the prototype model. The circular disk welding tip vibrates in both transverse and torsional vibration modes and an elliptical vibration locus is obtained at the circumference of the circular disk welding up. An ultrasonic seam welding equipment consists of a complex vibration circular disk welding tip that is driven by a longitudinal vibration system through a longitudinal-torsional vibration converter, and an automatic specimen shi fting stage. A large number of aluminum plate specimens of 0.3 mm to 0.5 mm thickness and 50 mm to 300 mm length were continuously joined to a thick a luminum plate at multiple welding parts.