An overview on characteristics and performance of ultrasonic welding process on different materials

Abstract

In recent days, ultrasonic welding processes are playing an extraordinary role in all industrial applications. Metals and non metals were processed under USW with different melting points. Thin wires of foils are easily welded through this process. High quality of welded joints can be achieved through USW without protective gas shield. The different process factors such as amplitude of vibrations, welding mode, down speed, pressure of trigger, weld time and clasp time were considered to determine the strength and quality of the joints. The varieties of joint designs were possible with definite features. The different ranges of frequencies have been applied in between the interface of the work piece. The plastic deformation of the metal occurred due to incorporation of vibrational energy and localized melting of the metal along the joint to be welded. The welded joints were quickly completed without any drying process which is suitable to soft and hard materials. The joint quality depends on the ultrasonic vibrations. The work piece to be joined were detained together under pressure and applied to ultrasonic vibrations (range between 20 and 40 kHz). This review paper deals about the ultrasonic welding characteristics, interface of welding joints, performance and welding factors for different materials.