Induction heating equipment can make metal objects instantly heated to any required temperature, including its melting point; There is no need to generate high temperature first and then heat the metal object heated by it like other heating methods, which can directly generate high temperature in the metal object; It can not only heat the metal object as a whole, but also selectively heat each part locally; It is a revolution in heating methods. It is also electric heating, but it can save 40% more electricity than electric furnaces and electric ovens; This is the strong advantage of high frequency induction heating and medium frequency induction heating.
Let's look at the difference between medium frequency induction heating power supply and high frequency induction heating power supply:
Principle of medium frequency induction heating: the workpiece is placed in the induction coil, which is generally a hollow copper tube with medium frequency input. The alternating magnetic field produces an induced current of the same frequency in the workpiece. The distribution of this induced current in the workpiece is uneven. It is strong on the surface, but weak inside, and close to 0 to the heart. Using this skin effect, the workpiece surface can be heated rapidly. Within a few seconds, the surface temperature rises to 800-1000 degrees, while the heart temperature rises very little. Medium frequency induction heating power supplies are mostly used in many fields such as surface quenching of industrial metal parts, metal melting, bar heat penetration and so on. It is to generate a certain induced current on the workpiece surface and quickly heat the part surface, so as to achieve the effect of rapid surface heating and even heat penetration melting. With the advantages of high heating efficiency, fast speed, good controllability and easy mechanization and automation, medium frequency induction heating has been widely used in smelting, casting, elbow, hot forging, welding and surface heat treatment.
Advantages of medium frequency induction heating power supply:
1. High heating temperature and non-contact heating
2. High heating efficiency - energy saving
3. Fast heating speed - less oxidation on the surface of the heated object
4. The temperature is easy to control - the product quality is stable and worry free
5. It can be heated locally - good product quality and energy saving
6. Easy to realize automatic control - labor saving
7. Good working environment - almost no heat, noise and dust
8. Less land occupation - high production efficiency
9. It can heat workpieces with complex shapes and has a wide range of applications
10. The workpiece is easy to heat evenly - the product quality is good
Principle of high frequency induction heating: heating is carried out by using the induced current (eddy current loss) generated by the conductor under the action of high frequency magnetic field and the hysteresis loss caused by the magnetic field in the conductor. Heat treatment of metal hardware and tools by high-frequency induction heating, brazing, welding, fusion of various hardware parts, welding of steel pipes and copper pipes, quenching of mechanical parts and auto parts, annealing and demagnetization of stainless steel, red burning and diathermy before bar forging, pushing elbow stretching and some special heating, melting and melting of a small amount of precious metals and alloys, etc. According to different workpieces, the workpiece can be locally heated, inner hole heated, or overall heated, surface heat treated or overall heat permeable, and the maximum temperature can reach 1500-2500 ℃.
Advantages of high frequency induction heating power supply:
1. High efficiency and energy saving: it can save 2 / 3 of electricity at a higher frequency than the electronic tube
2. Extremely light: only 16-40kg suitcase size
3. Low maintenance cost: no fragile and expensive electronic tube
4. Special safety: no high voltage, avoiding the risk of high voltage electric shock
5. Simple installation: only connect the power supply and water pipe, which can be completed in 10 minutes
6. Easy to operate: you can learn it in a few minutes
Medium frequency induction heating power supply smelts 5kg-60t various metals with high speed and efficiency; Large volume, mature technology, large output power and low failure rate. The effective hardening depth is 2 ~ 10mm (mm), which is mainly used for parts requiring deep hardening layer, such as medium modulus gears, large modulus gears, shafts with large diameter, etc. the high-frequency induction heating power supply is suitable for smelting 1-5kg precious metals. It is faster than the medium frequency furnace, cheaper, smaller in volume and small in land occupation. The effective hardening depth is 0.5 ~ 2mm (mm), It is mainly used for small and medium-sized parts requiring thin hardening layer, such as small module gears, small and medium-sized shafts, etc.