A medium frequency induction furnace is a power supply device that converts 50HZ AC power into medium frequency (above 300Hz to 20K Hz) AC power. It rectifies three-phase AC power into DC power, which is then converted into an adjustable medium frequency current. The DC current is supplied to the medium frequency alternating current flowing through the capacitor and induction coil, generating high-density magnetic lines in the induction coil and cutting the metal material contained in the induction coil, generating large eddy currents in the metal material.

Medium frequency induction furnace refers to an induction furnace powered by a power supply with a current frequency in the range of 150-8000Hz. The frequency of use is 150-2500Hz. As the furnace capacity increases, the frequency of the current used decreases. The capacity of domestically produced medium frequency induction furnaces ranges from 50KG to 20T, with corresponding current frequencies of 2500-150Hz.

This type of eddy current also has some properties of intermediate frequency current, that is, the free electrons of the metal itself flow in a resistive metal body to generate heat. For example, placing a metal cylinder in an induction coil with alternating medium frequency current, the metal cylinder is not in direct contact with the induction coil, and the temperature of the coil itself is already very low. However, the surface of the cylinder is heated to turn red or even melt, and the speed of this turning red and melting can be achieved by adjusting the frequency and current strength. If the cylinder is placed at the center of the coil, the temperature around the cylinder is the same, and the heating and melting of the cylinder does not produce harmful gases or strong light pollution to the environment.

Characteristics of series melting furnaces:

(1) High melting efficiency, good energy-saving effect, compact structure, and strong overload capacity.

(2) The temperature around the furnace is low, there is less smoke and dust, and the working environment is good.

(3) The operation process is simple and the melting operation is reliable.

(4) The metal composition is uniform.

(5) Melting and heating are fast, furnace temperature is easy to control, and production efficiency is high.

(6) The furnace has a high utilization rate and is easy to change varieties.

(7) The long arc-shaped magnetic yoke shields against magnetic leakage and reduces external magnetic resistance. It shields the magnetic leakage at both ends of the coil and seamlessly adheres to the inner and outer walls of the magnetic yoke with an arc-shaped cross-section, increasing the effective magnetic permeability area and providing better support for the coil. The positive and negative rotation coils improve the efficiency of the system.

Characteristics of the series of heat transfer furnaces:

Fast heating speed, high production efficiency, less oxidation and decarbonization, saving material and forging die costs

Due to the principle of medium frequency induction heating being electromagnetic induction, the heat is generated within the workpiece itself. Ordinary workers can start continuous forging tasks in ten minutes after using a medium frequency electric furnace, without the need for professional furnace workers to perform furnace burning and sealing work in advance. There is no need to worry about the waste of heated billets in the coal furnace caused by power outages or equipment failures. Due to its fast heating rate, this heating method has less oxidation, saving at least 20-50 kilograms of steel raw materials per ton of forgings compared to coal-fired furnaces, and its material utilization rate can reach 95%. Due to the uniform heating and small temperature difference between the core and surface, this heating method greatly increases the service life of the forging die in forging, and the surface roughness of the forging is also less than 50um.

Superior working environment, improved worker working environment and company image, pollution-free, low energy consumption

Compared with coal furnaces, induction heating furnaces no longer expose workers to the scorching sun and smoke of coal furnaces, and can meet the various indicators required by environmental protection departments, while establishing the company's external image and the future development trend of the forging industry. Induction heating is a more energy-efficient heating method in electric heating furnaces, which heats a ton of forging from room temperature to 1100 ℃ with a power consumption of less than 360 degrees.

Uniform heating, small temperature difference between core and surface, high temperature control accuracy

Induction heating generates heat within the workpiece itself, resulting in uniform heating and a small temperature difference between the core and surface. The application of temperature control system can achieve precise temperature control and improve product quality and qualification rate.

The medium frequency induction furnace heating device has the advantages of small size, light weight, high efficiency, excellent thermal processing quality, and favorable environment, and is rapidly phasing out coal-fired furnaces, gas furnaces, oil fired furnaces, and ordinary resistance furnaces. It is a new generation of metal heating equipment.

The intermediate frequency furnace is the main equipment in the casting forging and heat treatment workshop, and its stability, reliability, and safety are the guarantees for the normal and stable operation of the casting forging and heat treatment production line in the assembly line.