75°
15°
Form a weld pool
Travel direction
Angle torch
Add TIG filler wire
Retract the filler wire
Move the torch forward to the front of
the weld pool
Repeat the process
Gas shield
75°
Form a weld pool
Angle torch
Move the torch slowly and
evenly forward
Travel direction
TIG WELDING FUSION TECHNIQUE
TIG WELDING WITH FILLER WIRE TECHNIQUE
Manual TIG welding is often considered the most difficult of all the welding processes. Because the welder must
maintain a short arc length, great care and skill are required to prevent contact between the electrode and the
workpiece. Similar to Oxygen Acetylene torch welding, TIG welding normally requires two hands and in most
instances requires the welder to manually feed a filler wire into the weld pool with one hand while manipulating
the welding torch in the other. However, some welds combining thin materials can be accomplished without filler
metal like edge, corner, and butt joints. This is known as Fusion welding where the edges of the metal pieces are
melted together using only the heat and arc force generated by the TIG arc. Once the arc is started the torch
tungsten is held in place until a weld pool is created, a circular movement of the tungsten will assist is creating
a weld pool of the desired size. Once the weld pool is established tilt the torch at about a 75° angle and move
smoothly and evenly along the joint while fusing the materials together.
It is necessary in many situations with TIG welding to add a filler wire into the weld pool to build up weld
reinforcement and create a strong weld. Once the arc is started the torch tungsten is held in place until a weld
pool is created, a circular movement of the tungsten will assist is creating a weld pool of the desired size. Once
the weld pool is established tilt the torch at about a 75° angle and move smoothly and evenly along the joint. The
filler metal is introduced to the leading edge of the weld pool. The filler wire is usually held at about a 15° angle
and fed into the leading edge of the molten pool, the arc will melt the filler wire into the weld pool as the torch is
moved forward. Also a dabbing technique can be used to control the amount of filler wire added, the wire is fed
into the molten pool and retracted in a repeating sequence as the torch is moved slowly and evenly forward. It is
important during the welding to keep the molten end of the filler wire inside the gas shield as this protects the end
of the wire from being oxidised and contaminating the weld pool.
RAZOR MIG 250 Manual |
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DC TIG WELDING GUIDE
