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12 Welding
The welding parameters necessary for welding aluminium studs according
to DIN EN ISO 13918 are to be ascertained and checked by the user due to
the material characteristics (differences in alloy composition) and the used
shielding gas options.
Information and recommendations on this can be found in
DIN EN ISO 14555
.
When welding with shielding gas, an approximately 10 % longer welding
time is generally selected for the same welding current. When using the lib-
rary mode, the values for welding current and welding time are automatically
adapted to the welding process.
For alloyed steel a 10 % lower current is generally selected.
The specified values apply for welding in welding position PA. When welding
in welding position PC, the welding time must be reduced.
For short-cycle stud welding with drawn arc, the welding time is less than
100 ms. It is dependent not only on the stud diameter, but also on the availa-
ble current:
(I in A = min. 100 x Ø in mm)
When welding without weld pool protection, the welding time should be se-
lected as short as possible.
The welding energy is selected through the welding time alone.