How Much Do You Know About the Application of Intermediate Frequency Furnaces in Casting?

Intermediate frequency furnaces are widely used in forging and hot stamping. Round steel quenching and tempering, metal quenching, and other industries. The heating principle of intermediate frequency equipment for heat treatment of bars is to convert power frequency current into intermediate frequency current. A magnetic field is generated in the inductor coil to heat metal tools, which has the characteristics of fast heating speed, energy saving, environmental protection, and non-contact heating. The emergence of intermediate frequency furnaces has greatly promoted the development of enterprises.

 

The heart of the intermediate frequency furnace is the thyristor, and its correct use is crucial to the work of the equipment. If silicon is often fired, the electric furnace stops swinging, and production is affected, vigilance should be aroused. The working current of thyristor ranges from hundreds of amps to several thousand amps, and the voltage is generally 2000 volts. Good main control board protection and good water cooling conditions are necessary.

 

Overload characteristics of thyristor: The damage of the thyristor is called breakdown. Under ordinary water-cooling conditions, the current overload capacity can reach more than 110%; there is no voltage overload capacity, that is, silicon will inevitably be damaged under overvoltage conditions, and considering the surge voltage, manufacturers generally choose silicon components when manufacturing equipment. For example, when the rated working voltage in the intermediate frequency furnace cabinet is 750V, two 1400V withstand voltage silicon components can be selected to work in series, which is equivalent to 2800V withstand voltage.

 

The structural characteristics of the intermediate frequency furnace are mainly the use of intermediate frequency heating design, the heating frequency range is between 100Hz-800Hz, which is suitable for the depth of heat penetration of casting heating, meets the requirements of casting heating uniformity, reduces the consumption of raw materials, and saves forging materials. In the production process of intermediate frequency, in order to improve the automation degree of intermediate frequency furnace heating, manufacturers use a large number of PLC control components and control system software to ensure the application of intermediate frequency furnace in casting heating automation production line, thus improving the enterprise to a large extent The output power of casting heating.

 

What are the outstanding features of an intermediate frequency furnace?

 

1. It is very convenient to install and operate, and you can learn it as soon as you learn it; ultra-small size, light weight, movable, and small footprint;

 

2. 24-hour uninterrupted smelting capacity; power saving and energy saving;

 

3. It is convenient to replace the furnace bodies with different weights, different materials, and different starting methods to meet various melting requirements; the ultra-small intermediate frequency induction heating power supply is used, which is completely different from the traditional intermediate frequency power supply;

 

4. The heating has good thermal permeability and uniform temperature. The medium frequency magnetic field has a magnetic stirring effect on the molten metal, which is beneficial to the uniform composition and scum;

5. According to the recommended equipment and maximum melting capacity, the melting time of each furnace is 40-60 minutes.