Abstract
Ultrasonic welding is devoted to weld thin sheet me tals of similar or dissimilar couples of non-ferrou s alloys like copper, aluminum and magnesium without addition of filler material rin high quality weld; it can count on a lo w energy consumption and on a joining mechanism based on a solid state plastic de formation which creates a very homogeneous metallic structure between the base materials, free from pores & characterized by refin ed grains and confined inclusions’ Ultrasonic metal welding can join also painted or covered sheet metals. Thin sheets of aluminium have been joined to thin copper sheets by means of Ultrasonic spot Welding. Results are particularly effective in order to eval uate the relevance of various phenomena influencing the lap joint technique obtained on thin aluminium and copper by the application of Ultrasonic Metal Spot Welding (USMSW). The Present study considers the experiments carried out on the aluminum and copper sheets joints at room temperature. The aim is to e valuate the relevance of various factors influencing the lap joining techniq ue, allowing a deep understanding of the phenomena and the possibility to keep them under control; in the meantime, the feasibilit y and relevance of the proposed hybrid joining tech nology is discussed..
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