The main component of the butt welding machine is a step-down transformer, and the two ends of the secondary coil are the workpiece to be welded and the electrode. When working, the arc is ignited, and the electrode is fused into the gap of the workpiece at the high temperature of the arc. Because the iron core of the welding transformer has its own characteristics, it has the characteristics of a sharp drop in voltage, that is, the voltage drops after the electrode is ignited; when the electrode is stuck and short-circuited, the voltage drops sharply. Next, we will introduce the principle of butt welding machine and the advantages of butt welding machine.
What the butt welding machine uses is that the resistance will generate heat when the workpiece is in contact with each other, so as to achieve the purpose of heating the workpiece and make the metal surface melt, and the weld is formed under the condition of plastic deformation of the solid phase metal of the workpiece counterpart. The grain, weld structure and composition are close to the base metal, so it is easier to obtain equal-strength and equal-plastic welded joints. In the process of flashing, it has the self-protection function of exhausting air and reducing metal oxidation, so that there are fewer defects such as inclusions and incomplete penetration of welds.
Scope of application of butt welding machine
Welding has a wide range of applications. In principle, all metal materials that can be forged can be welded by flash butt welding. For example, low carbon steel, high carbon steel, alloy steel, stainless steel and other non-ferrous metals and alloys can be welded by flash butt welding.
The welding cross-sectional area range is large, generally from tens to tens of thousands of mm2 cross-sectional area can be welded.
Flash butt welding is widely used in welding various plates, pipes, profiles, solid parts, knives, etc. It is widely used and is an economical and efficient welding method.
