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Use of medium frequency power supply

Use of medium frequency power supply

Medium frequency power supply is the key used in pipe fitting equipment in an accessory, is also one of the main accessories, the main role is to heat the metal as a whole, the workpiece can reach a temperature range inside and outside. Also used in metal materials casting, stamping, extrusion, rolling and other processing before heating.

Due to the short heating time of intermediate frequency furnace, there is almost no or a small amount of oxide skin when heating, so the weight loss of oxide skin is less than 0.5%, and the weight loss of gas furnace oxide skin is as high as 20%, coupled with the loss and waste of pickling is very large. Therefore, the use of medium frequency power supply, can greatly improve the efficiency, and easy maintenance, reduce the labor intensity of workers, easy to realize automation.

With induction heating, the density of the induced current gradually decreases from the surface to the interior due to the skin effect of high frequency. For the same material, the higher the frequency, the faster the current density decreases from the outer surface to the inner.

In the application of heat treatment, the skin effect of intermediate frequency current is used to improve the mechanical properties of steel parts, so that it has higher hardness and fatigue resistance. For the steel pipe, the heating frequency is due to the diameter of the steel pipe and the thickness of the pipe wall. The smaller the diameter of the steel pipe, the higher the frequency of induction heating.

Quenching load characteristics: little change in load, less chance of overpressure and overpressure, but very frequent starting, short operation cycle.

Application in welding: medium frequency power supply can be used for welding, with the advantages of fast welding speed, little influence on the surrounding heat, no pickling to remove oxide skin. Can also be used after welding to add (tempering), can greatly improve the efficiency.

Intermediate frequency power supply is widely used, and some application fields are under development. With the development of thyristor technology and the accumulation of application experience, the thyristor intermediate frequency power supply will have a broader future.

With the development of all over the world, our company has improved the intermediate frequency power supply of pipe fitting equipment, one is power saving, the other is low noise and so on.