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Weldskill 200 ac/dc inverter – Tweco 200DC Inverter Arc Welding Machine User Manual

Page 43

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WELDSKILL 200 AC/DC INVERTER

Manual 0-5207

4-7

BASIC WELDING GUIDE

Art # A-07702

Figure 4-16: Multi Run Vertical Fillet Weld

Art # A-07703

Figure 4-17: Examples of Vertical Fillet Welds

2. Vertical Down

The Ferrocraft 21 electrode makes welding in this position particularly easy. Use a 3.2mm electrode at

100 amps. The tip of the electrode is held in light contact with the work and the speed of downward

travel is regulated so that the tip of the electrode just keeps ahead of the slag. The electrode should

point upwards at an angle of about 45º.
3. Overhead Welds

Apart from the rather awkward position necessary, overhead welding is not much more difficult that

downhand welding. Set up a specimen for overhead welding by first tacking a length of angle iron at

right angles to another piece of angle iron or a length of waste pipe. Then tack this to the work bench

or hold in a vice so that the specimen is positioned in the overhead position as shown in the sketch.

The electrode is held at 45º to the horizontal and tilted 10º in the line of travel (Figure 4-18). The tip of

the electrode may be touched lightly on the metal, which helps to give a steady run. A weave technique

is not advisable for overhead fillet welds. Use a 3.2mm Ferrocraft 12XP electrode at 100 amps, and

deposit the first run by simply drawing the electrode along at a steady rate. You will notice that the

weld deposit is rather convex, due to the effect of gravity before the metal freezes.

Art # A-07704

Figure 4-18: Overhead Fillet Weld

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