Medium frequency induction furnace

Medium frequency induction furnace

Vacuum brazing furnace, medium frequency induction furnace medium frequency induction furnace used for power supply in 150 - a - 10000 hz frequency range of induction furnace as medium frequency induction furnace, the main in 150 - a - 2500 hz frequency range. Domestic small frequency power frequency induction furnace for 150, 1000 and 2500 Hertz.
Medium frequency induction furnace is a kind of applicable to the smelting of high quality steel and alloy smelting equipment, and work well in induction furnace has the following advantages:
1) the melting speed, high production efficiency. Medium frequency induction furnace power density is big, the power of each tonne of steel liquid configuration than about 20 a 30% larger power frequency induction furnace. Therefore, in the same conditions of medium frequency induction furnace melting speed, high production efficiency.
2) strong adaptability, flexible use. Each in medium frequency induction furnace molten steel can all net, replace the steel grade is convenient; Per furnace and power frequency induction furnace molten steel does not allow the net, you must retain part of the liquid steel for the start of furnace, thus replacing steel grade is not convenient, only applies to single varieties of steel smelting.
3) electromagnetic stirring effect is better. As a result of the liquid steel under electromagnetic force is with power frequency is inversely proportional to the square root, so stirring force of intermediate frequency power supply is smaller than power frequency power supply. For removing impurities in steel and homogeneous chemical composition, uniform temperature, stirring effect of intermediate frequency power supply is better. Power frequency power supply big stir force make molten steel on the lining of scouring force increases, not only reduce the refining effect and can dramatically reduce the useful service life of crucible.
4) starting operation is convenient. Due to the skin effect of medium frequency current greater than the power frequency current, so the intermediate frequency induction furnace at the start, no special requirements to burden, after loading can rapid heating temperature; While power frequency induction furnace for specialized production of furnace charge block (and the approximate size of crucible, about in the cast steel or cast iron piece of crucible half height) to start the heating, and heating up slowly. Read this, under the condition of cycle operation mostly use medium frequency induction furnace. Start convenient bring another advantage is that can save electricity when cycle operation.

The preparation and production of induction melting furnace before use operation procedures

The preparation and production of induction melting furnace before use operation procedures

Preparation of the induction melting furnace before use
1. Check each distributor is normal.
2. Check the water, water pressure and flow rate is in line with the requirements.
3. Check the vacuum pump and vacuum system is normal.
4. Check the control cabinet and temperature measuring meter and the indicator light is normal.
5. The processed workpiece cleaned thoroughly with alcohol or gasoline
6. Artifacts in furnace, tooling, material basket, etc shall be clean and dry.
7. Vacuum cleaning furnace scale and sundry.
8. Use silk or wool fabric dipped in alcohol or gasoline wipe the oven door and furnace cover seal.
9. The workpiece is put should smooth and may not be in the running and scattered and crooked blowing process.
Induction melting furnace production operation procedures
1. The starting power supply, set the switch control cabinet in automatic control location.
2. Input the parameters of the process planning into the computer.
3. The workpiece with charging car smoothly away in furnace.
4. Close the oven door and lock (cover), to ensure the seal.
5. According to the technological requirements to choose good cooling medium and cooling method and pressure.
6. Press the cycle start button, equipment execution procedures: vacuum heating _ _ cooling automatically.
7. Check the equipment each system operation is normal, if there is any abnormal timely report the captain.
8. Before, we should restore the normal pressure in the furnace, the light is normal after open the oven door (cover).
9. When discharging, carefully operation, workpiece and tooling shall glory hole collision.

Intermediate frequency electric furnace casting low-temperature wax

Intermediate frequency electric furnace casting low-temperature wax

Intermediate frequency electric furnace casting low-temperature wax mould dewaxing easy preparation, high recovery and reuse pattern material. Faults caused by the low softening temperature strength is low, can not meet the higher requirements for quality castings, low temperature wax stearic acid in the process of using easy saponification deterioration of the casting surface quality, based on the above shortcomings have popped up in the production of medium temperature wax instead of low temperature wax and now the stearic acid price is more expensive, according to the manufacturer with their own way to choose a color.

Induction melting furnace in iron industry "charm"

Induction melting furnace in iron industry "charm"

In the iron industry, the two most commonly used to induction melting furnace were power frequency induction furnace and intermediate frequency induction melting furnace.
First for medium frequency induction melting furnace, its strong adaptability, the variety of burden or piece of degree is not very strict, so widely used in melting cast iron, its melting alloy cast iron, nodular cast iron and so on need induction smelting products are widely used in manufacturing.
Power frequency induction furnace melting slag is relatively slow, some are not suitable for slagging, production lack of flexibility, cold start need to start, but at the same time it makes heating and metal melting, uniform heating temperature, burning loss is small, can facilitate the regulation of iron liquid ingredients, small relatively dirty. So usually suitable for metals and alloys remelting and heating up.

Induction melting operation steps and common fault analysis

 Induction melting operation steps and common fault analysis

Induction smelting step useful check single crystal furnace, try single crystal furnace before formal jobs, single crystal furnace, melting product sampling inspection, adjustment test, the use of single crystal furnace power security, after the completion of these steps can be omitted.
Should be reviewed by induction melting equipment, see if there are any obvious damaged parts, and then according to the requirements of specification to the trial operation, if after trial work is normal, you can begin to formal production, but also constantly in the process of production of check products, to see if some of the products, product quality is qualified, if the index is not up to standard, will adjust the machine quality is unqualified, until melting product quality up to par.
Common single crystal furnace fault are crystal rods, single crystal furnace crystal rod shaking machine can still functioning, but the production efficiency is low, induction smelting products quality is poor so in order to improve the efficiency of the induction melting and quality, not blind smelting, must inspect the single crystal furnace. Crystal rods should inspect lift shaking head, cooling system and vacuum system. If it is lift head appear problem, is under maintenance, changed institutions or rotating mechanism. If it is cooling system and vacuum system appear problem, need to adjust the silicon material and structure of a heavy hammer. There is no problem if you examine these places, see if the inert gas such as argon flow inside the furnace, argon gas flow in the furnace, requires a modified single crystal furnace, the evenness of single crystal furnace thermal field distribution.

Technical characteristics of medium frequency melting furnace

Technical characteristics of medium frequency melting furnace

Medium frequency melting furnace for melting equipment in cast iron smelting and duplex melting has decades of history, China's manufacturing and labor frequency furnace and medium frequency furnace has a wealth of experience, in the power structure, frequency conversion technology, integrated control, circulating cooling technology and so on many aspects have made remarkable progress. Using medium frequency furnace melting and heat preservation of more and more manufacturers.
Medium frequency melting furnace features:
1) used for smelting medium frequency melting furnace, at present can be made in a single capacity also can achieve nearly tons, can meet the needs of the mass production. But many enterprises power capacity expansion is often difficult to overcome obstacles. Therefore, medium frequency melting furnace is more suitable for small and medium scale production.
2) commonly used medium frequency melting furnace to melt the various grades of steel and non-ferrous metals. Just for iron casting production, the adaptability of medium frequency melting furnace to product better than the cupola, medium frequency melting furnace can be a variety of high alloy cast iron smelting, such as high chromium cast iron.
3) medium frequency melting furnace are discontinuous melting, interval for a period of time to provide equal to furnace capacity of iron liquid, mode of production for stage duty, medium frequency melting furnace are more appropriate.

Several advantages of medium frequency furnace

Several advantages of medium frequency furnace

Medium frequency furnace has the following advantages:
1 simple, intermediate frequency furnace equipment. Compared with electric arc furnace, intermediate frequency furnace itself does not need large furnace equipment, don't need a large furnace equipment (such as hydraulic pressure, rotating mechanism, etc.), also don't require a lot of water cooling system, so its monomer equipment investment is relatively low, the equipment is simple and easy to master.
2, only has the function of the steel because of intermediate frequency furnace, no oxygen blowing in steelmaking process, so don't oxygen generator and other large equipment, it can also save money.
3, due to the small size, medium frequency furnace height is low, so the factory also was much lower than other steelmaking workshop, therefore, its cost in the factory building construction is also less than other types of steelmaking plant.
4, small and intermediate frequency furnace capacity, production arrangement is more flexible, especially suitable for small single piece casting production.
5, in addition, power frequency furnace and its related technology level is low, short-term easy to grasp.
6, the most low-end products in the market demand is not high, intermediate frequency furnace comprehensive cost is lower than other steelmaking process.

The application of medium frequency induction heating technology

The application of medium frequency induction heating technology

Induction heating technology in our country the earliest application military-industrial complex, automobiles, machinery and other industries, then gradually expand to the metallurgical industry, in the early 1980 s shougang special steel company in the domestic first began using the intermediate frequency heating technology, with 45 momnb, 35 crmo, 40 cr, 40 mn2mo and 45 # steel quenched and tempered treatment; For GCr15 steel tube cold working in the middle of the softening heat treatment; On 5 cr21mn9ni4n steel pipe solution heat treatment; For T10A, mn2 20, 20 # steel bar annealing heat treatment, has achieved good effect.
Using electromagnetic induction heating principle of intermediate frequency electric current for oil well tube of quenching, tempering and normalizing, in the United States and other developed countries have already belongs to a kind of mature technology, and in the field of oil special pipe manufacture to a wide range of applications. LONGSTAR company, unlimited companies in the United States, Russia, Japan JFE company tower dry rogge metallurgy factory, the volga steel pipe enterprise has its own medium frequency induction heat treatment production line.
Induction heating by electricity as an energy source, is completely different from using natural gas, gas, such as gas or liquefied petroleum gas in the heating process of steel tube produces soot, form of air pollution. Because power belongs to the green energy, will not cause damage to the environment, accord with the requirement of human society for environmental protection, so the government encourages the development of environmental protection technology development at home and abroad. At the same time, the use of induction heating technology to quenching, tempering and normalizing of steel tube, fast heating, high efficiency and convenient production organization

What is the intermediate frequency furnace?

What is the intermediate frequency furnace?

Intermediate frequency furnace using 200-2500 hz frequency induction heating power supply, heat insulation, it is mainly used for smelting carbon steel, alloy steel, special steel, also can be used for copper, aluminum and other non-ferrous metal smelting and the temperature. Equipment is small in size, light weight, high efficiency, less consumption, melting heat up quickly, easy to control furnace temperature, high production efficiency.
Medium frequency induction furnace hot water works
Using medium frequency furnace power supply mode is different from the power frequency electric boiler, is a 380 v power frequency ac power input of intermediate frequency power supply cabinet (intermediate frequency power supply is contained in the over-voltage protection, over-current protection, such as over voltage, over current phenomenon will automatically stop alarm), in the medium frequency power supply will be contained in the power frequency ac power rectifier for single phase dc, again through the inverter single-phase ac frequency voltage, electric current (single-phase ac frequency voltage and current are safe), the single-phase ac frequency voltage and current input induction heater produced for induction heating of the water in the boiler. This boiler heating process cwe separation, safe and reliable.