First, the principle of high-frequency welding
High-frequency welding is a process that utilizes the resistive heat effect of high-frequency current to weld metal materials together. Its working principle is to place the metal material in the magnetic field of high frequency current, under the action of the magnetic field within the metal material to produce eddy currents, and produce a large amount of resistance heat, so that the metal material melts and achieve the purpose of welding. High-frequency welding is usually applied to the welding of thin-walled metal materials, such as steel pipe, steel plate and so on.
Second, the manufacture and advantages of high-frequency welded steel pipe
The manufacture of high-frequency welded steel pipe mainly includes the following steps: first of all, the metal plate is rolled into a round tube of a certain diameter, and then the ports at both ends of the tube are processed to ensure the sealing of the tube; secondly, the tube is placed in a high-frequency welding machine, and the use of high-frequency current heats the ports at both ends of the tube to the melting state, and the two ends of the ports are quickly docked together, and the high-frequency current passes through the joints to produce resistive heat, so that the two ports melt The high frequency current generates resistance heat through the joint, so that the two ports are fused together; finally, after cooling, shaping and testing steps, the finished product of high-frequency welded steel pipe can be obtained.
Compared with the traditional arc welding, high-frequency welding has the following advantages: first of all, the welding speed, high efficiency, can realize mass production; secondly, the welding quality is high, the mechanical properties of the joints are excellent, there is no weld deformation and other defects at the joints; again is energy-saving and environmentally friendly, the high-frequency welding process uses only 1/10 of the power of the traditional arc welding; and finally, it is possible to realize automated production, reducing the labor intensity of workers. Labor intensity.
Third, the application of high-frequency welded steel pipe
Due to the high-frequency welded steel pipe has excellent mechanical properties, energy saving and environmental protection and high efficiency and low cost and other advantages, its application range is very wide. The following are the main application areas of high-frequency welded steel pipe:
1. Water supply and drainage pipes: high-frequency welded steel pipe has good corrosion resistance and compressive strength, and can be used to manufacture water supply and drainage pipes. Compared with other piping materials, high-frequency welded steel pipe manufacturing and installation costs are lower, more secure and reliable. 2.
2. Gas pipeline: gas pipeline requires high safety, high frequency welded steel pipe joints without welding stress, can better ensure the safe operation of the pipeline. At the same time, high-frequency welded steel pipe's lightweight and easy to install also reduces the installation cost.
3. Oilfield and chemical pipelines: Due to the special characteristics of oilfield and chemical industry, the requirements for pipelines are relatively high. High-frequency welded steel pipe has excellent pressure resistance, corrosion resistance and fatigue resistance, and is widely used in the oilfield and chemical industry.
4. Construction steel structure: High frequency welded steel pipe is also widely used in the field of construction steel structure. Due to its excellent mechanical properties and easy processing characteristics, it can be used to manufacture a variety of construction steel structure parts.
Fourth, the development trend of high-frequency welding technology
With the continuous progress of science and technology and the continuous development of industrial production, high-frequency welding technology is also constantly developing and improving. The following are the possible future development trends of high-frequency welding technology:
1. Efficient: to further improve the productivity of high-frequency welding is an important future direction of development. By improving equipment, optimizing the process and improving the level of operation, you can further improve the production efficiency of high-frequency welding.
2. automation: automation is an important development direction of modern manufacturing. Through automated equipment and control systems, you can realize the full automation of high-frequency welding production, improve production efficiency and product quality.
3. Diversification: With the different requirements of different fields for pipe materials and properties, the types and specifications of high-frequency welded steel pipe will continue to diversify. At the same time, the welding technology for different materials will continue to develop and improve.
4. Environmental protection: With the improvement of people's awareness of environmental protection, high-frequency welding technology of environmental protection will also become an important direction of development in the future. Through the use of environmentally friendly materials and the use of environmentally friendly technology and other ways to reduce the impact of high-frequency welding on the environment.
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