Effect of spot welding processing parameters on ferrous and non ferrous metal
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Date
2018-06
Authors
Mohd Fahmi Hafiz Abd Halim
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Abstract
Resistance Spot Welding (RSW) is the joining metal process that has been widely
used in industry nowadays especially in aerospace and automotive industry. RSW method
is focusing on the joining of sheet metal combination because of its limitation to the
certain thickness only. There has many research has been done on discussing about the
effect of welding parameters towards the properties and behaviour of spot welded joint.
However, this project is focusing on resistance spot welding (RSW) parameters towards
the tensile strength of the spot welded joint. The selected welding process parameters
involved are squeeze time, of 50ms and 100ms, welding pressure, of 0.37kN and 0.38kN
and also welding current of 4kA and 7kA. Experiments were conducted by joining the
similar combination of materials for copper, aluminium and galvanized iron and
dissimilar materials combination for copper and galvanized iron. The reliability of the
data expressed in form of Z score value for each set combination. They are calculated and
plotted in the bell shaped graph to make sure all the Z score value is placed between range
of -2 to 2. There are some few problems in the RSW method such as burn marks on the
spot welded joint and surface damage due to over pressure during RSW process.