WELDING PROCESSES
equipment manufacturing, insulation fastening, cable management, piping supports, and other applications where studs are irreplaceable.
Friction Welding Friction welding is an advanced welding process typically used in high- volume production. It involves rapidly moving one part over the surface of another or rotating it, causing friction that melts and fuses the two. Friction welding and its subgroup
A distinctive feature of ESW is its
reliance on slag conduction, which is pivotal in carrying the welding current through the process. The process finds its application in industries such as shipbuilding, power generation, and petrochemical sectors, where it serves as a crucial welding process.
Resistance Welding Resistance spot and seam welding (RSW) join two or more welded metal sheets by melting them between the two electrodes as a result of electrical resistance flow. The electrodes introduce electricity into the metal sheets. However, welded metal sheets have a higher resistance to electricity than electrodes, causing them to melt and fuse. The electrodes also apply pressure before, during, and after the welding process. Resistance welding is used in the
automotive industry, appliance production, aerospace, and general fabrication, where sheet metal must be welded quickly.
Stud Welding Stud welding is most commonly applied as an arc welding process where the electric arc is drawn between the stud and the metal surface, causing them to fuse. The stud gun also applies pressure, plunging the stud into the molten
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pool. It doesn’t use filler metal but can require a shielding gas or a ceramic shielding ferrule. Stud welding is extremely fast.
It’s the most productive way to weld a large number of studs to the metal surface. It’s most commonly used for through-deck welding in construction, where shear studs are welded to the steel deck before pouring the concrete. It is also heavily used in shipbuilding (decks),
friction stir welding are used in industries where weld quality must pass stringent standards. Some applications are aerospace, defence, chemical, nuclear, and similar industries. Equipment for friction welding can be very expensive and the working process may not be possible for all parts. For example, one part must be symmetrical, and the process must support rotating the part around its centre axis.
Cold Welding Cold welding uses pressure to form a weld between two metals pressed together. It’s most commonly used for welding wires and applications where electric arc or flame could be hazardous. It’s limited to welding ductile metals such as aluminium and copper.
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