The different frequency advantages of induction heating equipment have the following points:
1. Low frequency induction heating method
The lowest frequency, frequency range: power frequency (50HZ) to about 1KHZ, the commonly used frequencies are 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
2. Medium frequency induction heating method
Frequency range: ordinary 1KHZ to about 20KHZ, the typical value is about 8KHZ. The heating depth and thickness are about 3-10mm. It is mostly used for heating, annealing, tempering, quenching and tempering and surface quenching of large workpieces, large diameter shafts, large diameter thick-walled pipes, large modulus gears and other workpieces, as well as red punching and forging pressing of smaller diameter bars.
3. Ultrasonic induction heating method
Frequency range: Ordinary 20KHZ to 40KHZ (because the audio frequency is 20HZ to 20KHZ, so it is called super audio). Heating depth and thickness, about 2-3mm. It is mostly used for deep heating, annealing, tempering, quenching and tempering of medium-diameter workpieces, heating, welding, and hot assembly of large-diameter thin-walled pipes, and medium gear quenching, etc.
4. High frequency induction heating method
Frequency range: ordinary 40KHZ to 200KHZ, commonly used 40KHZ to 80KHZ. Heating depth, thickness, about 1-2mm. Induction heating surface quenching equipment is mostly used for deep heating, red punching, forging pressing, annealing, tempering, quenching and tempering, surface quenching, medium diameter pipe heating and welding, hot assembly, pinion quenching, etc. for small workpieces.
5. UHF induction heating method
The frequency is relatively high, and the frequency range is generally above 200KHZ, which can be as high as dozens of MHZ. The heating depth and thickness are the smallest, about 0.1-1mm. It is mostly used for quenching and welding of local extremely small parts or extremely thin bars, surface quenching of small workpieces, etc.
At the same time, these five kinds of induction heating equipment have certain advantages. They all use IGBT induction heating power supply, which is the most energy-saving and environmentally friendly induction heating equipment.
①Main features: small size, high power, fast heating, transparent core, low power consumption.
② Power saving situation: Compared with the old-fashioned thyristor intermediate frequency, the thyristor intermediate frequency heating consumes about 470 degrees of electricity per ton of workpiece.
③ Circuit features: The main device adopts IGBT module, the circuit does not control full-bridge rectification, capacitor filtering, bridge inverter, and series resonance output. It is fundamentally different from the old-fashioned intermediate frequency using thyristor parallel resonance.
④Power saving principle: Uncontrollable rectification, the rectification circuit is fully turned on. High power factor, voltage-type series resonance, etc., determine the substantial power saving of this equipment.
Hangzhou Yinda Electric Furnace Co., Ltd. is a manufacturing and service type enterprise which specializes in the design and production of all kinds of complete induction melting and heating equipment. custom Medium Frequency Furnace manufacturers and Foundry Casting Furnace Suppliers.Our company widely cooperates with the scientific research institutions both home and abroad and is devoted to researching and producing the complete equipment in induction heating, forging heating, heating treatment, quenching, soldering and brazing and another hot working field on the premise of taking the induction furnace (10kg-70T) as the leading product.