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| CUTTING AND GOUGING |
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| The cutting, gouging and piercing by means of shielded
metal arc welding principles is a flexible and economic
method of removing metal. The process does not require
any compressed air, gas or any type of special
electrode holder as standard equipment can be used. |
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| The coating on cutting and gouging electrodes develops
a strong gas jet, which blows away the molten material.
These electrodes are excellent for preparation prior to
repair of cast iron. The jet drives out and burns away
impurities and/or graphite on the surface and thus reduces
the risk of cracking and porosity when welding
later. Gouging of manganese steel can also be suitably
done. |
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| For gouging normally AC or DC- should be used, whereas
for cutting and piercing DC+ is recommended. The
arc is struck holding the electrode at 90° to the workpiece.
Once the arc is ignited, the electrode has to be
pointed in the appropriate direction at 5-1 0° to the job
surface and pushed in the forward direction. A to-andfro
motion has to be maintained to carryon with the cutting
or gouging action. For piercing, the arc has to be
struck in a vertical position and the electrode pushed
down to penetrate through the material. The electrode is
manipulated with a sawing motion to enlarge the bore. |
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| More Info... |
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