Welding method usually performed by a welding robot
Not to be confused with Cold welding.
Cold metal transfer (CMT) is a welding method that is usually performed by a welding robot. The CMT machine detects a short circuit which sends a signal that retracts the welding filler material, giving the weld time to cool before each drop is placed. This leaves a smooth weld that is stronger than that of a hotter weld. This works well on thin metal that is prone to warping and the weld burning through the material. This type of welding is more efficient than other GMAW methods when the metal is thinner than 10mm, anything thicker and the expense begins to overcome traditional welding.[1] Welding wire is fed through the system that is controlled by a computer, the computer adjusts things such as wire feed, welding speed, and amps going through the wire. This allows precise welding of materials like steel and aluminum, with very little slag and spatter, resulting in a cleaner finish weld.[2]
^Imoudu, Nelson Edoh (June 2017). The Characteristic of Cold Metal Transfer (CMT) and its application For Cladding(PDF) (Master's thesis). University of Tromsø – The Arctic University of Norway.
^Selvi, S.; Vishvaksenan, A.; Rajasekar, E. (2018). "Cold metal transfer (CMT) technology - An overview". Defence Technology. 14: 28–44. doi:10.1016/j.dt.2017.08.002.
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