SECTION 18 − GUIDELINES FOR TIG WELDING (GTAW)

 

 

 

 

gtaw 7/2006

18-1. Positioning The Torch

 

 

 

 

 

 

!

Grinding the tungsten elec-

 

 

 

trode produces dust and fly-

 

 

 

ing sparks which can cause

 

 

 

injury and start fires. Use lo-

 

 

 

cal exhaust (forced ventila-

 

3

 

tion) at the grinder or wear an

 

 

approved respirator. Read

 

 

 

 

 

 

MSDS for safety information.

2

 

 

Consider using

cerium or

 

 

 

lanthanum based tungsten

 

 

 

instead of thoriated. Tho-

 

 

 

rium dust contains low-level

 

 

4

radioactive material. Proper-

 

 

ly dispose of grinder dust in

 

 

 

an environmentally safe way.

90°

 

 

Wear proper face, hand, and

 

 

body protection. Keep flam-

1

 

 

mables away.

 

 

1

Workpiece

 

 

 

 

 

 

Make sure workpiece is clean

 

 

before welding.

 

 

 

2

Work Clamp

 

 

 

Place as close to the weld as

10−15°

 

possible.

 

 

3

Torch

 

 

 

 

4

 

4

Filler Rod (If Applicable)

 

5

5

Gas Cup

 

 

6

Tungsten Electrode

°

6

10−25

 

Select and prepare

tungsten

 

 

 

 

according to Section 17.

 

 

Guidelines:

 

5 6

The inside diameter of the gas cup should be at least three times the tungsten diameter to provide ade- quate shielding gas coverage. (For example, if tungsten is 1/16 in diameter, gas cup should be a minimum of 3/16 in diameter.

1/16 in

3/16 in Bottom View Of Gas Cup

Tungsten extension is the distance the tungsten extends out gas cup of torch.

The tungsten extension should be no greater than the inside diameter of the gas cup.

Arc length is the distance from the tungsten to the workpiece.

Ref. ST-161 892

OM-4409 Page 77

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Miller Electric OM-4409 manual Guidelines for TIG Welding Gtaw, Positioning The Torch

OM-4409 specifications

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