ATD Tools 3175 Bedienungsanleitung PDF herunterladen (Seite 21)

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force, is directed more toward the metal

above the weld joint. This is to help prevent

the weld puddle from running downward

while still allowing slow enough travel speed

to achieve good penetration. A good start-

ing point for angle B is about 30 degrees

DOWN from being perpendicular to the

work piece.

3. The VERTICAL POSITION (Figure 17) is

the next most difficult position. Pulling the

gun from top to bottom may be easier for

many people, but in some instances it can

be difficult to prevent the puddle from run-

ning downward. Pushing the gun from bot-

tom to top may provide better puddle con-

trol and allow slower rates of travel speed to

achieve deeper penetration. When vertical

welding, angle B (see HOLDING THE GUN -

p.18) is usually always kept at zero, but

angle A will generally range from 45 to 60

degrees to provide better puddle control.

WARNING

Hot slag can cause fires and serious injury

from burns! Be sure to wear protective cloth-

ing and eye gear when using the Overhead

Position.

4. The OVERHEAD POSITION (Figure 18) is

the most difficult welding position because

gravity is pulling at the weld puddle trying to

make it drip off the work piece. Angle A (see

HOLDING THE GUN - p.18) should be

maintained at 60 degrees, the same as in

the flat position. Maintaining this angle will

reduce the chances of molten metal falling

into the nozzle should it drip from the weld

puddle. Angle B should be held at zero

degrees so that the wire is aiming directly

into the weld joint. If you experience exces-

sive dripping of the weld puddle, select a

lower heat setting. Also, the weave bead

tends to work better than the stringer bead

when welding overhead.

MULTIPLE PASS WELDING

Butt Weld Joints. When butt welding thick-

er materials, you will need to prepare the

edges of the material to be joined by grind-

ing a bevel on the edge of one or both

pieces of the metal being joined. When this

is done, a V is created between the two

pieces of metal, that will have to be welded

closed. In most cases more than one pass or

bead will need to be laid into the joint to

close the V. Laying more than one bead into

the same weld joint is known as a multiple-

pass weld.

Figure 17. Vertical Position

Figure 16. Horizontal Position

Figure 18. Overhead Position

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