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Jun 17, 2022
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The trick of an experienced welder when welding thin metal 0.3 mm

Welding thin metal with a thickness of 0.3 mm, especially galvanized, is a rather difficult and unsafe task even for an experienced welder, since zinc fumes are very toxic and the welding process must be carried out outdoors or in a well-ventilated area and better with forced ventilation. Canvas or leather mittens or gloves should be worn on hands.

The trick of an experienced welder when welding thin metal 03 mm

The process of welding thin metal. The trick of an experienced welder

When welding thin metal, there are severe restrictions on the amount of welding current (should be within 30-50 A), but this makes it difficult to hold the electric arc. It is also necessary to use thin electrodes with a diameter of 1.6 to 2.0 mm. Along the welding line, remove the zinc coating, for example, with a wire brush and all contamination in the form of dust, dirt, oils, paints, protective films and other coatings.

The trick of an experienced welder when welding thin metal 03 mm

In order not to burn through thin metal, it is necessary to weld it not with a continuous seam without tearing off the electrode, but intermittently with a minimum gap between the workpieces to be welded. It is preferable in this case to use reverse polarity, which contributes to less sticking of the electrode and reduces the likelihood of thin metal burns.

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Traditionally, several methods of welding thin metal are used. The greatest difficulties arise when welding such a metal butt. Usually, even for an experienced welder, butt welding is not always given, and even more so for a beginner. The burnout of the metal in its design at first is 100% ensured even with intermittent electrode guidance.

The trick of an experienced welder when welding thin metal 03 mm

The overlap welding process of two thin metal blanks makes the task somewhat easier. An experienced welder almost always succeeds in overlap welding, but for a beginner, this option will present a certain difficulty. The task is somewhat facilitated due to the fact that the contact area of ​​the parts to be welded increases.

The trick of an experienced welder when welding thin metal 03 mm

The most suitable method for joining thin metal sheets is flange welding of the parts to be welded. To do this, we mark the edges of the workpieces to be welded and perform flanging, using, for example, a bench vise.

The trick of an experienced welder when welding thin metal 03 mm
The trick of an experienced welder when welding thin metal 03 mm

Then, holding and pressing the parts to be welded by both flanges with pliers, we perform an intermittent welding process of the flanges.

The trick of an experienced welder when welding thin metal 03 mm
The trick of an experienced welder when welding thin metal 03 mm

In this case, thin metal seems to thicken and instead of welding two sheets of 0.3 mm each, we weld, as it were, one sheet of double thickness (0.6 \u003d 0.3 + 0.3 mm).

The trick of an experienced welder when welding thin metal 03 mm

Welding electrodes for general use on Aliexpress at a discount – http://alii.pub/606j2h

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