Modeling and prediction of weld strength in ultrasonic metal welding process using artificial neural network and multiple regression method

In ultrasonic metal welding, two metal sheets are joined by the application of high frequency ultrasonic vibrations (20 kHz) under moderate pressure in which the vibrations are applied parallel to the interface between the sheets. The high frequency relative motion between the sheets forms a solid–state weld through progressive shearing and plastic deformation between surface asperities that disperses oxides and contaminants. It brings in an increasing area of pure metal contact between the adjacent surfaces to be joined. The schematic representation of ultrasonic metal welding is shown in Figure 1.