Ultrasonic Torsional Welding
Ultrasonic torsion welding uses ultrasonic waves and rotary motion to join non-ferrous metals. It is especially suited for large areas or cylindrical parts.
Physico-chemical mechanism of action
Ultrasonic torsion welding uses ultrasonic waves introduced into the workpiece via a rotational vibration motion. This generates high energy that plastically forms and joins the metals at the joint line.
Metallurgical relevance & risks during welding
This technique is especially suitable for non-ferrous metals like aluminum or copper. It enables high welding speed and a uniform joint. However, an overly fast ultrasonic signal can lead to overheating and local stresses, which can cause cracks or damage to the workpieces.
Workshop practice & operational instructions
For successful ultrasonic torsion welding, it is important that the tool is correctly set and held stable. The vibration frequency should be set to 20-30 kHz, and the rotor speed should be between 1000 and 3000 rpm. Too high energy can cause overheating, so careful control of welding parameters is essential.