Current contacting system prolongs torch life

May 17, 2012

Fronius has introduced the second generation of its Contec MD current contacting system. According to the company, in automated welding of aluminum and steel, it extends the endurance time of the torch from five to 15 times compared to a conventional nozzle. It also features high process stability and system availability, exact tool center point, and a flawless weld pattern, the manufacturer reports.

The wire is guided in 0.47-in.-long, V-shaped grooves under a defined contact pressure. After the half-shells start to wear, a mechanical spring ensures that the contact zone remains constant, providing a defined current transfer. At the end of their service life, the two half-shells are replaced, but the nozzle stock, compression spring, clamping nut, and spatter guard are reused.

The system is designed for use with electrode diameters from 0.03 to 0.06 in. and can be used on Robacta, Robacta Drive, and Robacta Drive CMT gas- and water-cooled torches.



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