Short arc welding
The heat input from short arc welding is low, which makes the process suitable for welding in thinner materials.
The drop from the electrode dip into the weld pool. The arc is therefore periodically replaced by a short-circuiting bridge of molten metal.
This can be repeated up to 200 times per second. If the short-circuit current is too
high, it has a considerable effect on the pinch-off forces, causing weld spatter. Some
means of limiting the short-circuit current must therefore be provided in the power unit,
through the use of an inductor coil.
It is not easy, with short-arc welding, to achieve a completely stable arc. The best
way to judge if the welding is going well is by the noise of the arc. The objective is to achieve a consistent, high short-circuiting frequency, resulting in small droplets being
transferred to the workpiece and spatter droplets being so fine that they do not adhere to
the workpiece. Good welding characteristicsin the power source are necessary, although
wire feed speed, current transfer in the contact tip and the welder's skills are also
important
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Date: 2023-04-10 hits: 578 Return
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