Electric Welding Processing Hefei Donghao Anhui Electric Welding Processing

Electric welding processing Hefei Donghao Anhui electric welding processing

In industrial production, arc welding is a very common metal joining method. As for daily maintenance, it is also a very common metal connection method. However, many people are not clear about the principle behind using electric energy to create high temperatures to melt metal.

How a welding machine converts energy

The working starting point of the welding machine is to connect to ordinary city power or industrial power. The pressure reducer, the core component of the machine, starts to operate. It greatly reduces the input voltage of 220 volts or 380 volts to reduce the welding stress in the riveting of engineering machinery . At the same time, the current intensity is significantly enhanced. This rise and fall of energy conversion prepares the conditions for the high-temperature arc required for welding. The powerful current ignites the arc between the welding rod and the workpiece. Its temperature center can exceed 3000 degrees Celsius, which is enough to quickly melt steel and welding rods.

The role of welding rod and shielding gas

The heat of the arc causes the core of the electrode to melt, forming molten droplets that transfer to the workpiece, creating a permanent connection between the two pieces of metal. The welding rod does not only have a metal core. The coating wrapped on its surface decomposes under high temperature conditions, producing gas and slag. These products can effectively cover the molten pool and block oxygen and nitrogen in the air, thereby preventing the weld metal from oxidizing and becoming brittle. In carbon dioxide gas shielded welding, the welding gun will continuously eject CO2 gas, which also forms a protective layer to ensure welding quality.

Welding rod selection under different working conditions

If you want to choose a welding rod, you must first consider the service environment of the weldment. For structures that bear impact loads, such as bridges and hoisting machinery, the welds must have both high strength and high toughness . To reduce the welding stress in riveting welding of engineering machinery , low-hydrogen welding rods are generally used. This type of welding rod can reduce the hydrogen content in the weld, significantly reducing the risk of cold cracking. In chemical equipment or coastal environments, when metal comes into contact with corrosive media, stainless steel electrodes or nickel-based electrodes must be used to match the corrosion resistance of the material.

Matching special temperature environment and welding materials

High temperature environments have special requirements for welding materials, and low temperature environments also have special requirements for welding materials. For example, heat-resistant steel electrodes containing elements such as chromium and molybdenum need to be used in boilers to ensure that the weld maintains stable performance under high temperature conditions. On the contrary, in low-temperature scenarios such as LNG storage tanks, special welding rods with very good low-temperature toughness must be used to prevent the structure from brittle fracture at low temperatures.

Constraints on weldment structure and construction

The characteristics of the welded structure itself will also directly affect the selection of welding rods. Electric welding processing Hefei Donghao Anhui electric welding processing. For thick and large components or rigid structures with complex shapes, the welding stress is extremely high, so low-hydrogen welding materials with excellent crack resistance must be used. For welding rods, when the welding position is difficult to clean and there is rust or oil stains, acidic welding rods that are insensitive to impurities should be selected. As for welding rods that are unable to flip the workpiece over for flat welding due to limited space, it is necessary to use welding rods that can weld in all positions.

Outstanding advantages of steel structure buildings

The core process of modern steel structure buildings is arc welding. This type of building uses composite wall panels and floor slabs, and pipe lines can be embedded inside to reduce the welding stress in the riveting of engineering machinery . It is also highly integrated with smart home systems. Compared with traditional concrete structures, steel structures are 30 to 50 percent lighter in weight and have thinner walls, which can effectively increase the actual usable area. It has excellent ductility, so its seismic resistance is outstanding, and its designed service life can reach a hundred years, showing the technical aesthetics of modern architecture.

During your welding operations or when choosing welding services, the most common confusion you encounter is the problem of material selection or the evaluation criteria for the final welding quality? Welcome to share your experience or questions. If you feel this article is helpful, please give it a like to support it.