Concept of induction heating
Our factory has some understanding of induction heating and welcomes everyone to ask related questions and purchase. Induction heating is a simple method for heating a batch of metal to a specified temperature.
Judian 5-ton induction furnace price
It can replace large furnace heating with long start-up and shutdown times and low efficiency. In contrast, induction heating devices have the advantages of small size, rapid start-up, cleanness and high efficiency. The energy of the induction heating furnace can enter the workpiece directly, and its heating time can often be as short as a few minutes (except when heating large objects), and this heating process is very suitable for automated production methods.
Induction heating
Although the cost of electricity per unit of energy is high, it can be compensated by high heating efficiency. As discussed in the previous article of this site (and will be explained in detail in it), induction heating occurs within a certain surface depth (heating from room temperature at a frequency of 50 Hz, the heating depth of steel is 2 mm; copper is 10 mm). The heat of heating needs to reach the rest of the bar or slab through heat conduction. Nonferrous metals have a high thermal conductivity, so there is no problem with heat transfer to the rest of the body. However, for steel and other metals with low thermal conductivity, we must avoid overheating or even melting of the surface.
Billet induction heating furnace
Heat flow is an important aspect of penetration heating. The figure shows a typical billet induction heating furnace.
Since we do not seek to limit the heating layer to the surface (for example, for quenching), we can use a lower frequency for heating. In this way, non-changing frequency industrial frequency (50/60 Hz) induction heating is obviously worthy of attention, and medium frequency induction heating (1~10 kHz) also has a wide range of uses. Penetration heating can be used for forging, forming, annealing and induction melting. It can also be used for extrusion heating of aluminum and other nonferrous metals. These heating applications are powerful, and since the furnace productivity is as high as several tons per hour, the power supply must be quite large (although hundreds of thousands of kilowatts are not uncommon, most commonly used are hundreds of kilowatts). The existence of Curie point causes the characteristics of steel heating.
Another feature of induction heating is reproducibility. For a given material, the power required will repeat the power of the previous heating cycle. In this way, the heating time can be used to measure the heating temperature, so that the heating required for a certain material can be determined.
This article is useful for fixed production rate heating with automatic feeding and automatic discharging; the selected cycle time is to ensure that the material can be processed at an appropriate temperature in the next process. It is used in most automated black metal induction heating forging production lines. The final heating temperature range is often 1150~1300℃, and a deviation of ±30℃ is usually allowed. In the case of uninterrupted power, the induction coil works continuously. Several workpieces can be heated by the induction coil on time, or several long bars can be heated sequentially by the induction coil.