Tig Torch; Tig Welding Principles And Guide - Everlast PowerPro 256 Operator's Manual

SECTION 3
3.8 TIG Torch. Becoming fa-
miliar with a TIG torch is a nec-
essary step to becoming profi-
cient at TIG welding. Due to
constant issues with sharpen-
ing and replacement of the
tungsten, frequent adjustment
and breakdown of the torch
components is often required.
Image 3.8a
Refer to the following image
PowerTig Torch
for a typical TIG torch break-
Assembly
down.
Image 3.8b Typical Torch Parts
1
2
1. Cap. This is also referred to as a Spur or
Rooster Spur. Short caps are available to pro-
vide easy access to tight places.
2. Tungsten. Be sure to select the proper size
tungsten for each job. Avoid use of green tung-
sten (pure) on Everlast Power Series welders.
See chart on page 19.
3. Collet. A snug fitting collet must be used to
prevent slippage and internal arcing.
4. Torch body. All parts connect inside or to
the outside of the torch body through threaded
connections.
5. Gas Insulator. Prevents loss of shielding
gas around cup. Replace if leaking or cracked.
6. Collet body. Holds collet.
7. Cup. Focuses and directs shielding gas
around weld area. Replace if damaged.
continued
3
4
5
7
6
GETTING STARTED
3.9 TIG Operation and Principles.
Before any welding takes place, it is
necessary to put on protective gear and
familiarize yourself with safety precautions.
TIG welding is an elite form of welding. Not
many people learn to fully master the tech-
nique due to the patience and practice this art
form requires. This manual cannot make you
a good welder. Only practice and skill can do
that. Everlast provides this basic information
as a general guideline to assist the operator in
learning basic principles and techniques.
Notice the basic components of the TIG pro-
cess in the image below.
The shielding gas flows out from the torch
head to cool and protect the molten puddle
and the tungsten as the arc continues to melt
the base metal. As the metal melts and a cir-
cular puddle is formed, the Tig torch is slowly
moved forward. While the metal gently flows
together, the filler rod is kept near the arc
and in the gas cone to keep it hot and keep it
from oxidizing. As the metal begins to form a
"keyhole" shaped puddle and penetration of
the metal is achieved, the filler rod is gently
added to the molten puddle and then removed
as a molten drop of filler material is added to
the base material.
As you familiarize yourself with the above di-
gest of basic TIG welding, there are a couple
of basic knowledge items that need to be ad-
dressed.
The tungsten must be shaped prior to initiat-
ing an arc. With inverter based TIG welders,
21
Image 3.9a