In the process of building a house, there is often a need for welding work. And a rare repair will do without it. And it is advisable for each builder to be able to carry out welding.
It is not enough to study the process of manual arc welding in theory, it is also necessary to test this process in practice. Only practice will help to learn how to cook and create strong compounds. Arc welding is the process of melting the edges of the parts connected using an electric arc that occurs between the electrode and the part.
Under the influence of an electric arc, the edge of the parts welded will melt, forming a welding bath into which metal flows from a molten electrode. After solidification, a welding seam is formed at this place and in this way an inextricable, strong connection is obtained.
In theory, the process of manual arc welding occurs as follows: the contact electrode of the welding apparatus and the electrode located in the hands of the welder are connected to the parts, after which they light up the arc.
This is done with a short touch of the electrode to the part. Then the electrode is diverted from the part at a certain distance (3-4 mm) required for the burning of the arc. The length of the arc strongly affects the quality of the weld. With a short arc, a high -quality seam forms, t. To. The metal from the electrode will quickly pass the arc gap, less oxidizing. With a long arc, the seam will turn out porous, fragile.
The electrode is kept at an angle of 70-80 ° in relation to the part to obtain a high-quality seam. When swar, the end of the electrode make oscillatory movements, which improve the warming of the edges of the seam, slow down the cooling of the welds, promote the homogeneity of the seam and eliminate the non -car of the seam. The amplitude of the oscillations depends on the required seam width.
Of course, it is difficult to explain the welding process in theory, therefore it is best that at first the knowledgeable and more experienced person stands over your soul and show you at least the basics.
