If you are interested in welding, then learn to navigate in terms of its classification. The types of welding differ in physical terms, depending on the form of energy used to form the welded joint. Learn about the theory of the three classes of welding: thermal, thermomechanical and mechanical. Each of them includes separate types of welding, which are subdivided according to a variety of technical and technological characteristics.
Instructions
Step 1
Manual welding is performed by a person using a tool. The welding equipment receives energy from a special source. For example, when performing arc welding - fusion welding, heating is carried out by an electric arc. Arc welding is performed with an electrode that, first melted during welding, consequently acts as a filler metal. The molten electrode is introduced into the weld pool as an additional component to the molten base metal.
Step 2
Construction and assembly production takes the first position in terms of the volume of arc welding.
Choosing an electrode, craftsmen no longer prefer steel electrode rods, chopped from wire, coated with a dried chalk solution to facilitate combustion. Now, when welding, electrodes with rods made of wire are used, the chemical composition of which includes special substances. The electrode must be covered with a special coating consisting of substances that protect the arc metal during welding from the harmful effects of the environment.
Step 3
To form a welded joint, the master strikes an arc at the point of the future seam, melts the edges of the base metal together with the electrode. It is necessary to ensure that the space between the parts to be welded is filled with liquid metal of the edges of the main part and the electrode. The welder achieves mixing of metals in one bath, the formation of a single seam. Then the electrode must be moved, heading towards the seam and along it, so that the connection of the parts is formed.
Step 4
When performing submerged arc welding, make sure that the arc burns under the ball of welding flux. Welding should be done with automated welding equipment. First, the arc is excited. Then the electrode wire or filler metal is fed. In this case, the relative movement of the arc and the welded product is carried out by mechanisms without human participation. The welder enters the appropriate program. The welding arc melts the main product, wire and flux. The process continues until the formation of a weld pool covered with a layer of molten flux. When the arc burns under flux, it is reliably protected from the harmful effects of air.
