Full transcript
0:04welcome and welcome once again to the channel learn every day
0:13electrode welding is also known as small mma electric welding or with the
0:20code 111 it is a fusion welding process in which we melt both the metal
0:28to be welded Just as the filler metal in this case is the electrode, if we carry out
0:35the welding correctly we will obtain a strong and resistant union.
0:42It is one of the most used manual electric arc welding processes along with
0:49the welding process itself, since the process semi-automatic and also along with the process,
0:58the coated electrode welding equipment is very simple, it consists of a portal clamp,
1:06all together with its cable resistant to the amperage to be used and a connection or terminal, the other part
1:13would be the ground, the cable and the edge would have We would also have the same characteristics as the
1:19connections inside the machine where the terminals will go. The power source, also
1:25called a welding machine, commonly contains the power outlet at the same time, and there are different
1:32types. It also has a transformer whose mission is to transform the voltage that
1:40It is supplied by the network from a high voltage to a low voltage and change the intensity from a
1:48low intensity to a higher intensity and to make the soldered joints.
1:55Nowadays, most power sources also have a rectifier whose mission
2:02It is to transform the current that is through the network from alternating current to direct current. They
2:10also have an intensity or amperage regulator and of course the connections where
2:16the terminals of both the ground and the electrode holder clamp go depending on how we place it.
2:22We will have one polarity or another if we place the electrode holder clamp on the positive pole
2:30we will have the reverse unit, however if we place the electrode holder clamp on the
2:40negative terminal or in the negative connection we will have direct polarity direct current electrode to
2:49negative in the process of welding itself we would have the base metal on one hand and on the other hand
2:56the electrode we would later establish the arc which we would do
3:02as we lit a match or a match in this way we would obtain what the
3:09electric arc is, it is what provides the temperature necessary to melt both the base metal and
3:15the electrode, thus we would generate a molten pool as we move forward with the
3:22electrode we would generate a welding bead the electrode is consumable and wears out it is
3:31composed of a coating and inside we have a soul that is made of metal, this
3:39metal soul, as it approaches the melting bath, increases the temperature, transforming
3:46into metal drops, these metal drops travel from the soul to the melting bath through the
3:55electric arc, not all of the metal that comes out From the electrode core goes to the fusion bath, there is part of the
4:03metal that comes out of the fusion valley in the form of projections, as you are seeing in
4:09this three-dimensional simulation, during the welding process, around the fusion bath,
4:18which is red hot, we have air. The air is logically composed of a large amount
4:25of oxygen. If this oxygen comes into contact with the metal or with the melting bath when it is at
4:32high temperatures, what will happen is that it will contaminate the bath, the metal will oxidize and
4:39therefore therefore we are going to obtain a weld that is not going to be resistant or healthy therefore it is not going to
4:46be acceptable however it does not require protection gas this protection against oxygen is
4:55achieved thanks to the coating the coating when it decomposes in part it becomes gases
5:03These gases create a column of smoke that prevents the access of oxygen and therefore prevents the
5:13oxidation of the metal. The coating, in addition to producing smoke to protect the fusion bath,
5:19contains chemical elements that eliminate impurities that may exist in the bath. of fusion,
5:26this coating travels towards the fusion bath surrounding the metal drops to later
5:33form a slag with the impurities that may be found in the bath and ends on the surface
5:40of the deposited bead, thus protecting both the drops on their journey. from the soul
5:47from the electrode to the melt pool and to the weld bead itself when it is still at high temperatures
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