Frequency and application occasions of different heating methods of yüksek frekanslı söndürme ekipmanı

1) Frequency range of high frequency induction heating method: common 40KHZ to 200KHZ, commonly used 40KHZ to 80KHZ. The heating depth and thickness are about 1-2mm. Induction heating surface hardening equipment is mostly used for deep heating, red punching, forging, annealing, tempering, quenching and tempering, surface quenching, heating and welding of medium diameter pipes, hot assembly, pinion quenching, etc. of small workpieces.

2) Ultra-high frequency induction heating method

The frequency is relatively highest, the frequency range: above 200KHZ, up to dozens of MHZ. The heating depth and thickness are the smallest, about 0.1-1mm. It is mostly used for the quenching and welding of local very small parts or very thin bars, and the surface quenching of small workpieces.

At the same time, these five kinds of induction heating equipment have certain advantages. They all use IGBT induction heating power supplies. They are the most energy-saving and environmentally friendly induction heating equipment in the 21st century.

3) Super audio frequency induction heating method

Frequency range: ordinary 20KHZ to 40KHZ (because the audio frequency is 20HZ to 20KHZ, so it is called super audio). The heating depth and thickness are about 2-3mm. It is mostly used for deep heating, annealing, tempering, quenching and tempering of workpieces with medium diameter, heating, welding, thermal assembly of thin-walled pipes with larger diameter, and medium gear quenching.

4) Low frequency induction heating method

The lowest frequency, the frequency range: power frequency (50HZ) to about 1KHZ, the commonly used frequency is mostly power frequency. The relative heating depth is the deepest, and the heating thickness is the largest, about 10-20mm;. Mainly used for overall heating, annealing, tempering and surface quenching of large workpieces. High frequency welding equipment

5) Frequency range of intermediate frequency induction heating method: ordinary 1KHZ to 20KHZ, the typical value is about 8KHZ. The heating depth and thickness are about 3-10mm. It is mostly used for heating, annealing, tempering, tempering and surface quenching of larger workpieces, large diameter shafts, large diameter thick wall pipes, large modulus gears, and red punching and forging of smaller diameter bars.

The new generation of high-frequency quenching equipment greatly improves production efficiency. The advantages are mainly manifested in the following points:

①Main features: small size, high power, fast heating, transparent core, low power consumption.

② Circuit characteristics: The main device adopts IGBT module, the circuit does not control full bridge rectification, capacitor filtering, bridge inverter, series resonance output. It is fundamentally different from the old-fashioned intermediate frequency using thyristor parallel resonance.

③Power saving situation: Compared with the old-fashioned thyristor intermediate frequency, the thyristor intermediate frequency heating uses about 470 degrees per ton of workpiece.

④Power saving principle: Uncontrollable rectification, and the rectifier circuit is fully conductive. High power factor, voltage type series resonance, etc., determine the substantial power saving of this equipment.