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12 Welding
12.2 Determining the Welding Time
Determination of welding time at the power unit using the arrow keys depends i.a.
on
– the welding gun used,
– the material of the welding element,
– the diameter of the welding element,
– the material of the workpiece.
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Determine the welding time to be set at the power unit using the following tables.
The figures in these table are indicative values and must be checked
by means of a test welding on the original material with the same pro-
perties as the original workpiece.
When welding with shielding gas, a 10 % longer time is normally selected.
When welding alloyed steel, a 10 % lower current is normally selected.
The given values apply to weldings in the welding position PA. The welding
time shall be reduced for welding in the welding position PC.
In the case of short cycle stud welding, the welding time is less than
100 ms. It depends not only on the stud diameter, but also on the available
current intensity (I[A] = min. 100 x Ø (mm)). The welding time should be as
short as possible in the case of welding without weld pool protection.