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The intermediate frequency induction furnace (hereinafter referred to as intermediate frequency furnace) has a working frequency between 50~ 10 Hz and is widely used in smelting non-ferrous metals and ferrous metals. Compared with other foundry equipment, medium frequency induction furnace has the advantages of high thermal efficiency, short melting time, less alloy element burning loss, wide melting material, small environmental pollution, and accurate control of temperature and composition of metal liquid.
This eddy also has some properties of the intermediate frequency current, that is, the free electrons of the metal flow in the metal body with resistance to generate heat. A three-phase bridge type fully controlled rectifier circuit is used to rectify alternating current to direct current. For example, a metal cylinder is placed in an induction coil with alternating middle frequency current. The metal cylinder does not contact the induction coil directly. The temperature of the coil itself is very low, but the cylinder surface is heated to redness and even melting. The rate of redness and melting can be achieved by adjusting the frequency and the strength of the current. If the cylinder is placed in 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 gas and strong light pollution. Medium frequency furnace is widely used in the smelting of nonferrous metal [mainly used in smelting steel, alloy steel, special steel, iron and other ferrous materials as well as smelting of non-ferrous metal materials such as stainless steel and zinc. It can also be used for smelting of copper and aluminum and other nonferrous metals and heating, heat preservation and double operation with blast furnace. ], forged heating [for the heat of rod, round steel, square steel, steel plate, heating, heating, on line heating, local heating, forging metal materials online (such as gear, semi shaft connecting rod, bearing and so on), extrusion, hot rolling, shearing before heating, heating, heating, and heating, and the tempering and annealing of the metal material as a whole. Tempering and so on. ] heat treatment and tempering production line [main shaft (axis, variable axis, camshaft, crankshaft, gear shaft, etc.); gear class; sleeve, ring, disk type; machine tool screw; guide rail; plane; ball head; hardware tools and other machinery (automobile, motorcycle) parts surface heat treatment and metal material overall conditioning, annealing, tempering, and so on. Medium frequency furnace is a power device that converts 50HZ alternating current to intermediate frequency (more than 300HZ to 1000HZ). It turns the three-phase power frequency alternating current into DC, then turns DC into adjustable intermediate frequency current, and supplies the intermediate frequency alternating current flowing through the capacitor and induction coil, and produces high density magnetic field in the induction coil. Force lines, and cut metal materials in the induction coil, produce large eddy currents in metal materials. Use the principle of electromagnetic induction to heat the metal.

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