PRO-POINT ARC 170 Manuel D'utilisation page 32

8611295 ARC 170 DUAL VOLTAGE ARC/TIG WELDER V1.0
TIG WELDING FUSION 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
Fig. 21
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 (Fig. 21).
32 For technical questions call 1-800-665-8685