Principle of high frequency induction heating machine and overvoltage protection during heating

High-frequency high-frequency current flows to the heating coil (usually made of copper tube) that is wound into a ring or other shape, thereby generating a strong magnetic beam with an instantaneous change in polarity in the coil, and heating objects such as metals. When placed in the coil, the magnetic beam will penetrate the entire object to be heated. In the opposite direction of the heating current inside the object to be heated, a correspondingly large eddy current will be generated. Due to the existence of resistance in the object being heated, it will generate A lot of Joule heat makes the temperature of the object itself rise rapidly to achieve the purpose of heating all metal materials. 1. Automobile manufacturing industry. Induction heat treatment technology is widely used in the automobile manufacturing industry, and the induction heating and quenching of auto parts with high-frequency induction heating machines has risen to about 50% of all heat-treated parts. The purpose of induction quenching is to improve the wear resistance of parts. , A considerable part is to improve the torsional fatigue strength and bending fatigue strength of parts. Typical parts of high-frequency heating machines include crankshaft, camshaft, flywheel ring gear, half shaft, shift fork, cross shaft, shock absorber shaft, etc. 2. Metallurgical machinery. The roller adopts double frequency induction hardening to achieve the best heating depth, others such as large modulus gears, steel pipe welds are annealed or tempered. 3. Building materials. Mainly include quenching of prestressed steel bars and annealing of welds. At present, a considerable number of heat treatment production lines for pipe pile steel wires have been built in China. Recently, a heat treatment production line for sleeper steel wires has been added. 4. Tractors and construction machinery. Except the engine quenching parts are similar to the automobile engine, there are many parts in the walking part that need to be quenched and heat treated with a high frequency induction heating machine, such as driving wheels, guide wheels, rollers, chain links, pins, sleeves, water pump shafts, valves Rocker arms, bulldozer blades, tractor final drive gears, etc. 5. Textile machinery. Spindles and other parts of the spinning machine use high-frequency induction heating machines for induction quenching and tempering heat treatment. Induction heating equipment 6. Bearing industry. The proportion of high-frequency induction heating machines for induction hardening of bearing rings, especially the raceways of large bearing rings, railway bearings, etc., is increasing year by year. 7. Heavy machinery. The heavy-duty mechanical induction heat treatment parts have large-modulus gears for transmission, and the shovel tooth plate of the excavator. 8. Machine tool manufacturing industry. In the machine tool manufacturing industry, the parts that need to be quenched with a high-frequency induction heating machine include the speed change gear of the spindle box, the spindle, the speed change fork, the surface of the guide rail and the wear-resistant parts of various small parts. For the purpose of protecting the components, circuits or accessories of electrical equipment, ensuring production quality and operating results, if the voltage of the equipment exceeds +15% during operation, there will be 'overvoltage-15% is 'undervoltageThe principle of overvoltage protection for ordinary electrical equipment in the gold Induction melting furnace is to connect a 'varistor' in parallel at both ends of the power supply line. Carry out the insurance action, the rear end of the power supply will be free from the danger of overvoltage. Although this also achieves the purpose of overvoltage protection, the varistor cannot continue to be used after the overvoltage breakdown, and needs to be replaced in time. Trouble, if not replaced or repaired in time, there will be circuit and equipment damage, and even fire. The high-frequency induction heating furnace is equipped with overvoltage protection and undervoltage protection circuits. Once overvoltage or undervoltage occurs, the overvoltage or undervoltage indicator on the panel will automatically light up to perform alarm protection, that is, prompt The staff should immediately take protective measures, so as to protect the equipment in a timely manner, without the need to replace the accessories, effectively prevent the occurrence of fire hazards, and make it safer. Kehua Induction Heating Equipment is a non-standard customized high-frequency induction heating machine manufacturer that produces high-frequency heating machines, high-frequency quenching equipment, high-frequency brazing machines, and intermediate-frequency melting furnaces. I want to know more about high-frequency heating machines, high-frequency For details of quenching equipment, high frequency brazing machine, and intermediate frequency melting furnace, please contact us.
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