Tandem and twin wire welding
Another way of improving productivity and raising the welding speed is to use double
filler wires. Both wires can be connected to the same power unit, which means that they
share a common arc. This method goes under the name of Twin Arc. Alternatively, if
two power units are used, the method is referred to as Tandem Welding. Nevertheless,
the two wires are so close to each other they weld into a common weld pool.
Welding with two wires can increase the speed to at least twice the normal value or,
when welding thin sheet, even higher. In some applications, linear welding speed can be
up to 6
Setting the welding current and voltage can be much more complicated when two
wires are used, particularly with tandem welding as it is necessary to set the welding data
separately for each wire. Because the two arcs are close to each other, they can some-
times interfere through magnetic arc blow effect. Therefore this process often uses
pulsed welding, with the pulses on each wire displaced out of phase with each other..
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Date: 2023-04-10 hits: 656 Return
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