round steel local intermediate frequency heating furnace

Introduce： The local medium frequency heating furnace of round steel is often used for heating forging or annealing of round bars and sheets. It provides the selection method of local medium frequency heating furnace for round steel, the selection of local intermediate frequency heating furnace structure for round steel, local intermediate frequency heating of round steel. Furnace power supply selection method, selection method of local medium frequency heating furnace parameters of round steel

Consultation

Related Products

Related Pictures

20mm bar induction heating forging furnace

Introduction

Consultation

The whole set of round medium steel intermediate frequency heating furnace is controlled by PLC programmable operation table. The equipment is highly automated. The heating temperature of the workpiece is measured by infrared thermometer. The data is transferred to PLC , the power supply is automatically adjusted, and the heating temperature of the workpiece is adjusted. Strong controllability. In addition, the whole set of metal heat treatment equipment can be equipped with automatic feeding, discharge mechanism, closed cooling tower, low voltage electric cabinet and so on.
Summary of technical parameters of round steel local intermediate frequency heating furnace

Within the local intermediate frequency furnace 1000KW power round technical parameters Summary Table
Rated power(KW )	Rated frequency (HZ)	Transformer capacity (KVA)	Secondary voltage (V)	Number of commutating pulses	Sensor voltage(V)	Power consumption (KW.h/t)	Round steeldiameter ( mm )
80	1000~8000	100	380v	6 Pulse	800	450	Φ 6-35
100	1000~8000	160	380v	6 Pulse	800	450	Φ 25-40
120	1000~8000	200	380v	6 Pulse	800	450	Φ 30-50
160	1000~8000	250	380v	6 Pulse	800	450	Φ 40-60
200	1000~8000	315	380v	6 Pulse	800	450	Φ 40-60
250	1000~8000	400	380v	6 Pulse	800	450	Φ 60-80
350	1000~8000	500	380v	6 Pulse	800	450	Φ 80-120
400	500~8000	500	380v	6 Pulse	800	450	Φ 80-120
500	500~8000	630	380v	6 Pulse	800	450	Φ 120-150
1000	500~1000	1250	660V-380V	12 　 Pulse	1200 / (800)	380	Φ 150-250
1500	500~1000	1600	Φ 660V-380V	12 　 Pulse	1200 / (800)	370	Φ 250-400
2000	500~1000	2200	Φ 660V-380V	12 　 Pulse	1200 / (800)	360	Φ 400-800

Round steel local intermediate frequency heating furnace application assembly drawing

Round steel local intermediate frequency heating furnace application field:

Forging heating: used for round steel, round steel, square steel, steel plate heating, temperature compensation, blue quenching, on-line heating, local heating, metal material online forging (such as gears, semi-shaft connecting rods, bearings, etc.) Extrusion, hot rolling, heating before shearing, spray heating, thermal assembly, and heating, annealing, tempering, etc. of the entire metal material.

Heat treatment: mainly for shafts (straight shaft, variable diameter shaft, camshaft, crankshaft, gear shaft, etc.); gears; sleeves, rings, discs; machine tool screws; guide rails; planes; ball heads; hardware tools, etc. Surface heat treatment of mechanical (automobile, motorcycle) parts and heating, annealing, tempering, etc. of the entire metal material.

What parameters are required for the selection of the local medium frequency heating furnace for round steel?

The selection of the local medium frequency heating furnace for round steel generally requires the following parameters:

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

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

Third: the time of the target temperature required for heating the heated workpiece, and the target temperature.

Once the above three points are clear, the round medium local intermediate frequency heating furnace can be selected including matching power.

What are the characteristics of the local medium frequency heating furnace body structure of round steel?

1. Furnace structure: Our company's heating furnace is designed as an overall quick change type. Quick change is possible when changing the furnace body for different heated workpieces.

2. Furnace lining: The lining is made of silicon carbide or integral knotting, and the temperature is above 1450 °C.

3. Protection: Automatic shutdown when the water temperature exceeds 65 °C.

4. Induction furnace water cooling rail: Water-cooled rail is installed on the induction furnace lining.

How to calculate the power of the local medium frequency heating furnace of round steel?

P=(0.168×200×693)/(0.24×0.6×145)=1029KW In the formula: 0.168—the average specific heat of the ferrous metal; 2080—the mass of the workpiece (Kg); 200—the temperature rise of the workpiece heating; 0.24— Work heat equivalent; 0.6 - average efficiency (0.6 in this case, generally 0.5 ~ 0.65, lower profile sensor, take 0.4); 145 - work beat (seconds)

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

How to choose the power frequency of the local medium frequency heating furnace of round steel?

The choice of power frequency follows the principle of optimal heating efficiency and temperature uniformity (core temperature difference). The higher the frequency, the higher the heating efficiency, but the too high frequency is likely to cause the surface of the workpiece to be too burnt. According to our experience, the frequency is selected to be 2500KHZ. , the best heating effect can be obtained without overheating the workpiece temperature.

How to choose and choose the local medium frequency heating furnace of round steel? Mainly from several aspects:

1. Shape and size of the heated workpiece

Large workpieces, round steels and solid materials shall be selected from local medium frequency heating furnaces with large relative power and low frequency; small workpieces, tubes, plates, gears, etc., and round steel partial intermediate frequency heating furnace with low relative power and high frequency. .

2. Depth and area required for heating

The heating depth is deep, the area is large, and the whole heating should be selected from the local medium frequency heating furnace with large power and low frequency; the heating depth is shallow, the area is small, local heating, and the local intermediate frequency heating furnace with small relative power and high frequency is selected.

3, the required heating rate

The required heating speed is fast, and a round medium local intermediate frequency heating furnace with relatively large power and relatively high frequency should be selected.

4, the continuous working time of the equipment

The continuous working time is long, and the partial medium frequency heating furnace with a slightly larger power is relatively selected.

5, the connection distance between the sensing component and the device

The connection length is long, and even the use of water-cooled cable connection is required. The medium-frequency induction heating furnace with higher power should be used relatively.

6, process requirements

In general, quenching, welding and other processes, relatively power can be selected smaller, frequency selection is higher; annealing, tempering and other processes, relative power selection is larger, frequency selection is lower; red punch, hot calcination, smelting, etc., need For a heating process, the power should be chosen to be larger and the frequency selected lower.

7, the material of the workpiece

The relative power of the high melting point of the metal material is larger, the relative power of the lower melting point is smaller, the power of the smaller resistivity is larger, and the power of the larger resistivity is smaller.

Round steel local intermediate frequency heating furnace has significant advantages:

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

2. Compared with the thyristor intermediate frequency, the energy saving is 10%~30%, and there is no harmonic interference to the power grid;

3. Compared with the resistance furnace, the energy saving is 50%~60%;

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

5. The sensor is isolated by a transformer and is very safe.

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

7. Adaptability: It can heat various workpieces with different shapes.

8, the equipment occupies a small area, less than two square meters, to facilitate customers to maximize the use of production space.

Why is the round steel partial intermediate frequency heating furnace high efficiency?

The principle of local medium frequency heating furnace of round steel is electromagnetic induction, and its heat is generated in the workpiece itself. The ordinary workers can carry out the continuous work of forging task ten minutes after working in the local medium frequency heating furnace of round steel . No professional workers need to burn in advance. Furnace and sealing furnace work. Don't worry about the waste of the heated billet of coal stove caused by power failure or equipment failure. Because of the rapid heating rate of this heating method, there is very little oxidation, and at least steel raw materials are saved per ton of forgings compared with coal burning furnace. 20-50 kg, its material utilization rate can reach 95%. Because the heating method is evenly heated, the core surface temperature difference is very small, so the forging die life is greatly increased in forging, and the surface roughness of the forging piece is also less than 50um. Induction heating heat is generated in the workpiece itself, so the heating is even, the temperature difference between the core and the core is very small. The temperature control system can be used to achieve accurate temperature control to improve product quality and pass rate.

Understand Wikipedia： induction heating

Recommended Reading： Induction heating furnace

Recommended Reading： round bar induction heating furnace

PREV：Round steel local heating electric furnace

NEXT：Round steel medium frequency induction heating furnace

[ BACK ]