Arc welding of metal by metal electrode

Are you interested in manual arc welding of metals by an electrode from the supplier company AvecGlob? Here you will find interesting information on this topic /

Classification and preparatory transitions

There are four basic processes for manual electrode welding:

Shielded arc welding

MIG / metal welding with inert gas

Arc welding under a layer of flux

TIG / arc welding with tungsten non-consumable electrode.

The most common shielded metal arc welding. When choosing the technological methods, take into account the location of such welding — outdoors or indoors, but using shielded welding it is possible not to worry about external temperature, wind, etc. Also, when choosing the type of electrode correctly, there is no reason to take care of the quality of the surface of the initial blanks.

To safely perform manual welding of the electrode, protective clothing, a mask, a fan (welding fumes — are toxic) are necessary. Then follows the preparation of blanks. The surface to be welded must be free and clean from rust, with a minimum of oil, water and paint. Excessive humidity with this kind of welding impairs the quality of the welded seam.

Sequence of execution

Manual electro welding of the electrode is as follows:

connect the grounding clamp from the electrode to the metal;

in the place where the welding begins, the arc is ignited;

as the electrode melts, a metal melt occurs in the weld zone to form a liquid metal bath, the coating around the electrode creating a shield for oxygen of the air that will tend to contaminate the weld seam;

During the movement of the electrode along the welding line, it continues to melt, creating a crater and replenishing the welding bath.

A good clean connection and a properly selected technique contribute to the formation of an even and reliable seam.

Supplier — AvekGlob Company — offers at affordable prices from the manufacturer various metals and alloys, in the quantity and assortment that are required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer.

Electrode selection for welding

It is determined by the nature of the welding joint. When flat welding any type of electrode is suitable, it is important to choose the correct electrode holder. Its material is subject to certain requirements for mechanical strength, including bending. It is believed that the strength of the electrode holder should be twice the limit of the temporary resistance of the welded steel.

When adjusting the welding machine, the electrode is selected, the polarity is set (in accordance with the recommendations) and the welding machine is transferred to the required power range. The advantage is given to the rig that allows welding both constant and alternating current.

Quality control of manual electrode welding

Attention is drawn to the following problems:

adhesion of the welding electrode. Temporary interruption of the arc is performed by submitting from the opposite side of a piece of inappropriate metal, on which it is necessary to translate the arc. Then, the remainders of the welding flux are separated from the rod and the arc is restarted;

difficulty in moving the electrode holder. For complex surfaces, both hands should be used (therefore the mask has a preference in front of the shield);

To improve the quality of the welded seam, the electrode is moved in a circular motion.

Supplier — AvekGlob Company — offers to purchase various metals, alloys, welded structures in any quantity and range of sizes. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.