Bar heating furnace

We are currently selling bar heating furnaces with excellent performance! Adopting advanced technology, the heating is rapid and uniform, and the temperature can be precisely controlled to ensure excellent processing effect of the bar material. It has high stability and safety, and is easy to operate. Suitable for processing various types of metal bar materials, it is your ideal choice to improve production efficiency. Come and choose now!

The complete set of fully automatic bar heating furnace consists of: medium frequency power supply, capacitor cabinet, inductor, fully automatic feeding rack, unloading rack and control cabinet. The medium frequency power supply adopts split structure design, and the power cabinet is GGD standard cabinet. The capacitor cabinet and inductor structure design are compact, which improves the heating efficiency.

Reasonable control of the distance between the inductor and the heated round bar shortens the time that the red hot round bar is exposed to the air, reduces the oxide scale of the round bar, and reduces energy consumption. According to the process parameters set by the user, the speed of the transmission mechanism is automatically controlled. When there is no workpiece in the sensor, the automatic control system automatically reduces the output power of the medium frequency power supply; when the workpiece enters the sensor, the automatic control system automatically increases the output power of the medium frequency power supply

I. Summary of technical parameters of bar heating furnace

Round bar diameter

Round bar length

Heating temperature

Heating furnace power

Φ16mm

300mm

1100

250kw/4000HZ

Φ31-80mm

70-480mm

1250

500kw/2500HZ

Φ12 0mm

1500mm

1250

2000kw/1000HZ

Medium frequency induction heating furnace can be customized according to actual needs

1. Application field of bar heating furnace:

Forging heating: used for heating of round bars, round steel, square steel, steel plates, supplementary temperature, online heating of blue quenching, local heating, online forging of metal materials (such as gears, half-axle connecting rods, bearings, etc.), extrusion, hot rolling, heating before shearing, spray heating, hot assembly, and heating, annealing, tempering of metal materials as a whole.

Heat treatment: mainly for shafts (straight shafts, variable diameter shafts, camshafts, crankshafts, gear shafts, etc.); gears; sleeves, rings, discs; machine tool screws; guide rails; planes; ball heads; hardware tools and other mechanical (automobile, motorcycle) parts surface heat treatment and overall quenching, annealing, tempering, etc. of metal materials.

1. What parameters are required for bar heating furnace selection?

The selection of a bar heating furnace generally requires the following parameters:

First: the shape, outer dimensions, and weight of the heated workpiece.

Second: the material of the heated workpiece (general induction heating is only for metal conductor materials).

Third: the time required for the heated workpiece to reach the target temperature, and the target temperature.

Once the above three points are clear, the bar heating furnace can be selected, including the matching power.

Fourth, what are the characteristics of the bar heating furnace body structure?

1. Furnace body structure: Our company's heating furnace is designed as an integral quick-change type. When the furnace body is replaced for different heating workpieces, it can be quickly replaced.

1. Furnace lining: The furnace lining adopts silicon carbide or integral knotting, and the operating temperature is above 1450℃.

1. Protection: Automatic shutdown when the water temperature exceeds 65℃.

1. Induction furnace water-cooling rail: A water-cooling rail is installed on the induction furnace lining.

Five, how to calculate the power of the bar heating furnace?

P=（0.168×200×693）/（0.24×0.6×145）=1029KW Where: 0.168—average specific heat of ferrous metal; 2080—mass of workpiece (Kg); 200—temperature rise of workpiece heating; 0.24—work-heat equivalent; 0.6—average efficiency (0.6 in this example, generally 0.5~0.65 can be taken, and 0.4 is lower for special-shaped inductors); 145—working cycle (seconds)

According to the above calculation, a 1KHz induction heating device with a rated power of 1500KW can be configured to meet the needs.

1. How to choose the power frequency of the bar heating furnace?

The selection of power frequency follows the principle of optimal heating efficiency and temperature uniformity (core-surface temperature difference). The higher the frequency, the higher the heating efficiency. However, too high a frequency can easily cause overburning of the workpiece surface. According to our experience, choosing a frequency of 2500KHZ can achieve the best heating effect without causing the workpiece temperature to overheat.

VII. How to choose and select a bar heating furnace? Mainly consider several aspects:

1. Shape and size of the workpiece to be heated

For large workpieces, round bars, and solid materials, a bar heating furnace with relatively large power and low frequency should be selected; for small workpieces, pipes, plates, gears, etc., a bar heating furnace with relatively small power and high frequency should be selected.

1. Depth and area required for heating

For deep heating depth, large area, and overall heating, a bar heating furnace with large power and low frequency should be selected; for shallow heating depth, small area, and local heating, a bar heating furnace with relatively small power and high frequency should be selected.

1. Required heating speed

For fast heating speed, a bar heating furnace with relatively large power and relatively high frequency should be selected.

1. Continuous working time of equipment

If the continuous working time is long, a rod heating furnace with slightly larger power should be selected.

1. Connection distance between induction components and equipment

If the connection is long, or even requires the use of water-cooled cables, a medium-frequency induction heating furnace with larger power should be selected.

1. Process requirements

Generally speaking, for processes such as quenching and welding, relatively smaller power and higher frequency can be selected; for processes such as annealing and tempering, relatively larger power and lower frequency can be selected; for processes such as red punching, hot forging, smelting, etc., which require good heating effects, the power should be selected larger and the frequency should be selected lower.

1. Material of workpiece

For metal materials with high melting points, relatively larger power should be selected, and those with low melting points should be selected smaller power; for metal materials with low resistivity, relatively larger power should be selected, and those with high resistivity should be selected smaller power.

Eight, the significant advantages of the bar heating furnace:

1. Compared with traditional heating methods (oil, coal, gas), it has the significant advantages of environmental protection, energy saving, easy operation and low labor intensity;

1. Compared with the thyristor medium frequency, it saves 10%~30% energy and has no harmonic interference to the power grid;

1. Compared with the resistance furnace, it saves 50%~60% energy;

1. It has the advantages of fast heating, uniform heating, no oxide layer and good product quality for customer products;

2. The sensor is isolated by the transformer and is very safe.

1. Environmental protection: no pollution, noise and dust.

1. Strong adaptability: can heat workpieces of various shapes.

1. The equipment occupies a small area of ​​less than two square meters, which is convenient for customers to maximize the use of production space.

Nine, why is the bar heating furnace efficient?

The principle of the bar heating furnace is electromagnetic induction, and its heat is generated in the workpiece itself. Ordinary workers can carry out continuous forging tasks ten minutes after going to work with the bar heating furnace, and there is no need for professional workers to burn and seal the furnace in advance. There is no need to worry about the waste of billets heated by the coal furnace due to power outages or equipment failures. Since this heating method heats up quickly, there is very little oxidation. Compared with coal-fired furnaces, each ton of forgings can save at least 20-50 kg of steel raw materials, and its material utilization rate can reach 95%. Since this heating method heats evenly and the temperature difference between the core and the surface is extremely small, it greatly increases the life of the forging die in forging, and the roughness of the forging surface is also less than 50um. The heat of induction heating is generated in the workpiece itself, so the heating is uniform and the temperature difference between the core and the surface is extremely small. The application of temperature control system can achieve precise control of temperature and improve product quality and qualified rate.