Soham Impex SI-TIG-300, Operating Manual

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TIG Welding Fusion Technique
TIG Arc
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.
Form a Weld Pool Angle Torch Torch Move