The new revolution in digital GMA welding

CMT: Three letters – one new technology – innumerable benefits

CMT stands for Cold Metal Transfer. In the context of welding, “Cold” is a relative term, of course. Nevertheless, the fact is that in this new process, the workpieces to be joined - and above all their weld zones - remain considerably “colder” than they would do in conventional GMA (gas metal arc) welding. The reduced thermal input leads to advantages such as low distortion and higher precision. This, however, is just one of the distinguishing features of this new GMA technology for automated and robot-assisted applications. The other significant benefits for users include the higher quality of the welded joints, freedom from spatter, the ability to weld light-gauge sheet from 0.3 mm, and the facility for joining both galvanised sheets and steel to aluminium. By "higher quality", what is meant here is e.g. higher uniformity and reproducibility, and thus fewer rejects. As well as for welding, the new technology is also suitable for use with brazing processes. By the time CMT was ready for series industrial production, Fronius had invested five years'  development work, and corresponding resources, in the CMT process and in the equipment to go with it.