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This is mechanical related question.
All about robot spot welding and the equipment needed for robotized welding. ... This is a type of resistance welding where the spot welds are made at regular ... The process is used for joining sheet materials and uses shaped copper alloy ... it has a low resistance and high thermal conductivity compared to most metals.
Nowadays, spot welding is the process which is used to mate two or more sheetmetals in metro trains. The process is automated using the pnematic power. All the sheetmetals coming in the range of0.5 to3mm are subjected to spot welding.
I think the main concern for spot welding is the thickness and not the material. The material should be coming under the group of metals to act as a good conductor.
Low carbon steel is one of the most readily spot welded materials, as well as being the most commonly used material for stampings and fabrications. It can be spot welded to many ferrous and non-ferrous alloys with varying success, depending on the combination of metals joined.
Higher carbon and low-alloy steels can also be spot welded, although with reservations, because of a tendency to form harder welds, which may degrade weld performance. As carbon content increases, so does brittleness, with an associated propensity for cracking and weld separation.
Tungston
WG
a welding gap
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