Electric welding is a very well -known way of fastening metal parts, known since the end of the 19th century. But this method has gained greatest widespread and popularity in the middle of the 20th century.
Advantages of electric welding over other methods of connecting metal structures:
– Saving metal, which is why the weight of the structure is significantly less without loss of strength.
– A significant reduction in work time and, as a result, a decrease in the cost of the structure.
– The ability to make a complex typical design of the components, and not use expensive technologies – casting and stamping.
– Relatively cheap technological equipment with high performance.
– The ability to quickly switch to new types of materials.
– The possibility of using components and assemblies in the repair, without subjecting them to complete disassembly.
– High reliability of welded joints.
The processes of electric arc welding in manual and semi -automatic method are actually identical – this is the melting of the metal of the elements of the product and electrode through an electric arc. During the welding process, the molten metal is mixed, forming a strong, sealed seam.
But semi -automatic welding has its own characteristics and advantages:
– Technological: good performance, high quality of the weld, it is convenient to make short seams under constrained conditions (you do not need to cut the electrode to get to a difficult place), you can weld in weight.
– Economic: due to the simplification and technological process of the work process, significant savings are achieved.
Semi -automatic welding differs in the nature of the weld:
– welding under a layer of fluxes;
– welding in the gases protecting seam;
– Welding using powder wire.
Semi -automatic welding devices are distinguished by the type of wire receipt:
– pulling;
– pushing;
– universal.