Correct Application Techniques - Linde BOC Smootharc Advance MIG 425R Operating Manual

54 BOC Smootharc Advance III MIG 425R & 555R Operating manual

14.0 Correct Application Techniques

Correct Application Techniques
Direction of welding.
MIG welding with solid wires takes place normally with a push technique. The
welding torch is tilted at an angle of 10° towards the direction of welding.
(Push technique)
10°
The influence of changing the torch angle and the welding direction on the
weld bead profile can be seen below.
Torch perpendicular to workpiece narrow bead width with increased
reinforcement.
10°
Torch positioned at a drag angle of 10° narrow bead with excessive
reinforcement.
Electrical stickout
C Contact Tube Setback
S
Standoff Distance
V
Visible Stickout
A
Arc length
E
Electrical Stickout
Gas Nozzle
Consumable
Electrode
Workpiece
Flux cored welding with cored wires takes place normally with the drag
technique. The welding torch is tilted at an angle of 10° away from the
direction of welding. For all other applications the torch angle remains the
same.
0–15°
90° 90°
Torch position for butt welds
When welding butt welds the torch should be positioned within the centre of
the groove and tilted at an angle of ±15° from the vertical plane. Welding is
still performed in the push technique.
45°
45°
Torch position for fillet welds
When welding fillet welds the torch should be positioned at an angle of 45°
from the bottom plate with the wire pointing into the fillet corner. Welding is
still performed in the push technique.
Contact Tube
C
V
S
A
0–15°
E