Spot Welding

Spot attachment is one in every of the oldest attachment processes. it's employed in a good vary of industries however notably for the assembly of sheet steel vehicle bodies. this is often a kind of resistance attachment wherever the spot welds square measure created at regular intervals on overlapping sheets of metal. Spot attachment is primarily used for connexion components that square measure unremarkably up to three millimetre in thickness. Thickness of the components to be welded ought to be equal or the quantitative relation of thickness ought to be but 3:1. The strength of the joint depends on the amount and size of the welds. Spot-weld diameters vary from three millimetre to twelve.5 mm.