Round bar heating furnace

Introduce： Round bar heating furnace is often used for heating forging or annealing of round bars and sheets, providing a selection method for round bar heating furnace , selection of round bar heating furnace structure , selection method of round bar heating furnace power supply, round bar The method of selecting the parameters of the heating furnace .

Consultation

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Introduction

Consultation

Round bar furnaces are often used for heated forging or annealing of round bars and sheets to improve metal thermoplasticity. The metal heating workpiece is placed in the induction coil of the alternating magnetic field. Since the induction directly acts on the workpiece itself to generate eddy current and heat, the round steel heating device has short heating time, convenient temperature control, guaranteed heating quality, improved working conditions, and easy integration. produce. Therefore, it has more and more applications.

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Method for selecting power supply of round bar heating furnace, method for selecting parameters of round bar heating furnace

1000KW power within rod furnace technical parameters Summary
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 roddiameter ( 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 rod heating furnace PLC intelligent control system :

1, the user needs to provide a touch screen or a remote control console

2 , man-machine interface, easy to operate

3 , real-time adjustment of equipment operating parameters

4 , real-time control of the heating process, and has a recording function

5 , different international language switching

Main features of round bar heating furnace :
1. It is used for heating various round steels such as carbon steel and iron;
2 , medium frequency and super audio heating round steel, more heated, more uniform and faster;
3 , round bar heating furnace small volume, easy to move, can be used with any forging and rolling equipment;
4 , the round bar heating furnace makes the round steel heated to the required temperature in a very short time, greatly reducing the metal oxidation, saving material and improving the forging quality;
5 , automatic feeding, automatic feeding, automatic production capacity;
6. The advantages of round bar heating furnace for power saving, environmental protection, cost reduction and manpower expenditure;
7. It is convenient to replace the sensor to meet the different requirements of the overall heating or end heating of the round steel.
What parameters are required for the selection of round bar furnaces?

The selection of round bar heating furnace 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 bar heating furnace can be selected including matching power.

What are the characteristics of the round bar heating furnace structure?

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 furnace lining adopts silicon carbide or integral knotting method, and the use 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 round bar heating furnace?

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 to 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 round bar heating furnace?

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 use a round bar heating furnace? Mainly from several aspects:

1. Shape and size of the heated workpiece

For large workpieces, round bars and solid materials, round rod heating furnaces with relatively high power and low frequency should be used; for small workpieces, pipes, plates, gears, etc., round rod heating furnaces with relatively low power and high frequency are used.

2 , depth and area to be heated

Deep heating depth, large area, overall heating, should use high power, low frequency round bar heating furnace; shallow heating depth, small area, local heating, the use of relatively low power, high frequency round bar heating furnace.

3 , the required heating rate

The required heating speed is fast, and a round rod 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 round rod heating furnace with a slightly larger power is used.

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.

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