A REVIEW ON THE APPLICATION OF RESISTANCE SPOT WELDING OF AUTOMOTIVE SHEETS
Publication Date : 01/08/2015
The automotive industry is now one of the most important sectors of all developed economies. It provides job opportunities to many people at various levels of the economy. Resistance spot welding is the dominant welding process in the automotive industry. The structural integrity of a vehicle depends largely on the quality of resistance spot welds. The process is fast, effective and also complicated due to complex interactions between electrical, mechanical, thermal and metallurgical processes. Due to increasing demand for improved fuel efficiency, reduced CO2 emission and superior crashworthiness, significant effort is continuously being applied to develop lightweight materials with excellent strength-ductility combination. This paper reviews automotive sheet materials and mechanical performance of resistance spot welds in terms of weld nugget size, load bearing capacity and failure mode, under quasi static loading conditions. It also reviews the effect of process parameters such as welding current, welding time and electrode force on the mechanical performance of spot welds.
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