Environmental characteristics of medium frequency heating equipment

Environmental characteristics of medium frequency heating equipment

Medium frequency heating furnace is a kind of will power frequency 50 hz alternating current into intermediate frequency power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by the capacitor and inductor in the flow of intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials.
Professional build medium frequency heating furnace/frequency diathermy equipment series of characteristics of heating furnace, heating speed, high production efficiency, less oxidation decarburization, save material and cost, extend the life of the mold.
Due to the principle of electromagnetic induction medium frequency induction heating, the heat inside the workpiece itself, ordinary workers with intermediate frequency electric furnace to work after ten minutes for the task of forging work continuously, without burning furnace professional workers for burning furnace and furnace work ahead of time. Due to the heating mode heat up fast, so few oxidation, medium frequency heating forging of oxidation burning loss is only 0.5%, gas stove heating oxidation burning loss of 2%, coal-fired furnace reached 3%, intermediate frequency heating process saving material, every tons of forgings and burn coal stove compared to save steel raw materials for at least 20 to 50 kilos. The material utilization rate can reach 95%. Table due to the heating way heating uniformity, core temperature difference, so in terms of forging also greatly increase the service life of forging die, forging surface roughness is less than 50 um technology of energy saving, energy-saving 31.5% ~ 54.3%, the proportion of medium frequency heating oil heating than gas heating energy saving 5% ~ 40%. Heating quality is good, can reduce the rejection rate of 1.5%, increasing production rate of 10% ~ 10%, 10% ~ 15% extend the die life.

Medium frequency induction furnace work on what principle

Medium frequency induction furnace work on what principle

How intermediate frequency induction furnace works, what is the principle of intermediate frequency induction furnace, the following is to introduce: medium frequency induction furnace is a kind of will power frequency 50 HZ alternating current into intermediate frequency (above 300 HZ and 20 k HZ) power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by capacitance and induction coil in through the intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials.
The vortex also has some properties of intermediate frequency electric current, i.e., the metal itself free electrons in the resistance of the metal body flow to generate heat. , for example, put a metal cylinder has alternating medium frequency current in induction coil, metal cylinder has no direct contact with induction coil, electric coil temperature is very low, but the surfaces are heated to redness, and even melt, and the redness and melting speed as long as adjust the size and the strength of the current frequency can be achieved. If the cylinder on the coil center, surrounding the cylinder temperature is the same, the cylinder heating and melting did not produce harmful gases, light environmental pollution.

Several advantages of medium frequency induction furnace

Several advantages of medium frequency induction furnace

1 simple, intermediate frequency induction furnace equipment. Compared with electric arc furnace, medium frequency induction 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 induction furnace, high 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 induction 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, the comprehensive cost of the intermediate frequency induction furnace is lower than other steelmaking process.

Induction heating furnace of market strategy

Induction heating furnace of market strategy

Induction heating technology in metallurgical industry heat treatment is a new energy-saving technology. In heat treatment industry, the induction heating furnace because of its fast heating, high energy utilization and energy conservation and environmental protection advantages is widely attention and application of heat treatment industry is a revolutionary technological progress. And iron and steel production, for example in metallurgical industry, iron and steel production points, long, short process, short process of smelting process is based on electric furnace smelting equipment, renewable scrap steel as the main raw material, the production process is beneficial to environmental protection, along with the advance of the electric furnace smelting technology, short process of smelting technology has more and more strong vitality and competitiveness.
There are two kinds of iron and steel production process, short process and long process. Long process consists of the blast furnace, converter, continuous casting and rolling process consisting of; Short process is made up of electric furnace, refining outside the furnace, continuous casting and rolling process. Long process of smelting process for iron ore, coke, coal, limestone and so on scarce resources dependence is extremely strong, is not conducive to environmental protection. At the same time, the discharge of waste gas, waste residue, waste water in the process of production is bigger, dealing with three wastes costs is higher, make long process technology is facing challenges. Short process of smelting process in electric furnace for smelting equipment, renewable scrap steel as the main raw material, is beneficial to environmental protection, in terms of short process of smelting equipment, electric furnace, divided into two kinds of electric arc furnace and induction furnace. Although the traditional electric arc furnace in metallurgical industry occupies a dominant position. But the induction furnace smelting principle makes it have the advantage of innate difference in electric arc furnace.

Medium frequency melting furnace cast iron is the development direction

Medium frequency melting furnace cast iron is the development direction

Compared with cupola, using medium frequency furnace iron liquid, can reduce pollution of the environment, is advantageous to the liquid iron quality control, investment is less, and can be easily for nodular cast iron, vermicular cast iron and grey cast iron and other cast iron grade of production, mode of production is very flexible. Compared with using mainly iron ingredients melting scrap steel carburization process smelting iron liquid, can reduce the cost of iron liquid, 1000 yuan.
Medium frequency furnace melting iron liquid, after crushing, processing clean blasting foundry return, can significantly improve the quality of molten iron, reduce energy consumption of molten iron. Our foundry in 10 t worked as a production test on the intermediate frequency furnace, using clean furnace charge back, in the production of high-power diesel engine cylinder head, casting blowhole rejection rate was 6% lower, liquid iron smelting consumption reduce 90 kw · h/t; At the same time can effectively reduce the labor intensity of workers, grilled slag, improving casting smelting operation environment, reduce the slagging phenomenon of power frequency furnace throat opening, solve the problem of difficult after the oven slagging, prolonging the service life of power frequency furnace lining 20%, improve the efficiency of smelting production. Therefore, using medium frequency furnace melting iron liquid, to attach great importance to purification of furnace charge, especially back to the burden of crushing, blasting purification treatment, which is play the efficiency of the intermediate frequency furnace smelting iron a very important link.

Vacuum furnace smelting non-ferrous metal alloy

Vacuum furnace smelting non-ferrous metal alloy

Non-ferrous metal alloy vacuum furnace smelting in below atmospheric pressure until the high vacuum (from 100 kpa to 1.3 x 10-10 pa) under the condition of non-ferrous metal smelting and casting process. The production of refractory, rare and active metal material, is also a material with high purity and high quality metal important modern smelting technology. Vacuum smelting in 1917 began to transition from laboratory scale to the factory, at that time, only a small amount of smelting nickel base alloy, thermocouple material and heat resistance. With the development of vacuum technology and military industry and modern science and technology, the need for high performance new metal materials, vacuum melting has been developing rapidly. Titanium in the 1950 s began to mass production. In the 70 s have dozens of tons to hundreds of tons of capacity of vacuum smelting equipment, now has developed into a important production department is equipped with modern technology and equipment of special material. Vacuum melting because the purification effect of strong, volatile impurities, gas effect is good, strong deoxidization ability, nitride and hydride can pyrolysis, some cannot be under atmospheric chemical reactions can also, especially the reaction with gaseous product formation, so to get high purity, uniform texture, low air content, less impurity, less defect and good performance of metal material processing. Atomic energy industry with high purity barium, hafnium and vanadium and thorium, high temperature alloy, thermoelectric, active metal titanium and zirconium alloys and magnetic materials, refractory metal, tungsten, molybdenum, tantalum, niobium and electric vacuum with copper, nickel alloys were produced by vacuum remelting process. Main vacuum smelting equipment and method of vacuum induction melting furnace, electric arc furnace smelting (see non-ferrous metal alloy vacuum arc furnace smelting) and electron beam furnace smelting 3 kinds.
Vacuum induction furnace smelting, is to put the sensor and the crucible into a vacuum, in 2 ~ 1.3 x 1.3 x 10-10-3 pa vacuum melting, used in the production of high temperature alloy and precision. Electron beam furnace smelting is under high vacuum (1.3 x 1.3 x 10-1 ~ 10-5 pa) with one or several, electron beam emitted from the electron gun bombardment was melted objects to melt drip into the condensed ingot water-cooled copper mold. Electron beam furnace smelting Yu Chaochun metal and refractory metal smelting.

Good vacuum induction furnace protection maintenance methods

Good vacuum induction furnace protection maintenance methods:

1) the pump protection maintenance, please see the detail its use manual;
2) vacuum induction furnace, when not in use for a long time, it is necessary to properly keep system with cooling water should be put on net. Especially in the winter should adhere to the indoor temperature above 10 ℃, smooth with antifreeze bad equipment and adhere to the outstanding conditions;
3) work to introduce choose 46 anti-wear hydraulic oil, oil using oil temperature within 15 ℃, 60 ℃;
4) the oil should be consented to enter the tank after strict filtering;
5) oil each replaced once a year, for the first time in the replace time shall not exceed three months;
6) check check once every six months pressure gauge,
7) the machine is stopped for a long time, the processing appearance should be wiped clean and coated with anti-rust oil.
8) don't know the structure of the machine function or procedure should not private line to start the machine;
9) machine in the process of operation, should not be for maintenance and adjustment mould;
10) when machine found serious leak or other abnormal (such as the action is not reliable, large noise, vibration, etc.) should be parking analysis reason, try to wipe out, not being put into production.
11) shall not be overloaded or beyond the maximum offset distance use;
12) long-term need not when vacuum induction furnace, vacuum box should be insured deposit under the vacuum condition, all equipment cooling water should be put on net. Especially in the winter should adhere to the indoor temperature above 10 ℃, smooth with antifreeze bad equipment and adhere to the outstanding conditions;
13) before beginning each technical process, should be measured a heater resistance and insulation resistance to ground, ensure no short circuit, open circuit representation;
14) regularly check system all wiring is loose or break line, such as found that should tighten loose place, will break from cohesion;
15) heating chamber, such as attack damage need to replace, otherwise the heat preservation effect;
16) to check the electric control cabinet back each relay is instrumentation, such as loose surface are detected, should be timely put tight;
17) time to arrange, electric control cabinet to remove adherent dust, crushed, metal scraps, etc., don't make it work for a long time in high temperature, moisture, dust pollution environment;
18) claims that did not work, please send electric control cabinet back all the status of the circuit breaker from ON to OFF, or directly closed the total power, avoid shock disturbance;
19) using the touch screen, pay attention to the operation process, avoid the wrong operation; Touch screen together to gently, avoiding the damage to the screen.

Vacuum induction brazing furnace process method

Vacuum induction brazing furnace process method

Vacuum induction brazing furnace process methods is more, mainly is divided according to the use of equipment and working principle. According to the heat source such as have infrared, electron beam, laser, plasma, glow discharge brazing, etc.; According to the working process of the points have contact reaction brazing and diffusion brazing, etc. Contact reaction brazing is the use of filler metals andparent metal reaction liquid filling joint gap. Diffusion brazing is to increase the thermal diffusion time, make the weld and parent metal full homogenization, to get the same as the parent metal properties of joints. Vacuum induction brazing furnace process method
Soldering iron soldering for small soft soldering of simple or very thin parts.
Wave soldering is used for large quantities of printed circuit boards and electronic components assembly welding. Welds, around 250 ℃ in the molten solder under the pressure of pump through the narrow seam formation wave, workpiece after wave for welding. This method is of high productivity, can realize automatic production on line.
Flame brazing with combustible gases mixed with oxygen or air combustion flame as a heat source in welding. Flame brazing equipment is simple, easy to operate, according to workpiece shape available flame heating welding at the same time. This method is suitable for the bicycle frame, aluminum water spout and other medium and small welding.
Dip soldering part or the whole workpiece in covering flux of solder bath or only the molten salt salt bath heat welding. This method is heated evenly and quickly, more accurate temperature control, suitable for mass production and welding of large components. Salt bath salt in more composed of soldering flux. After welding workpieces are often left plenty of soldering flux, cleaning work.
Induction brazing with high frequency, intermediate frequency or power frequency inductive current welding method as a heat source. High-frequency heating is suitable for welding thin wall pipe fittings. Coaxial cable and jewels can be away from the power of the induction coil, the field brazing, especially suitable for some large components, such as the rockets need to remove the pipe joint welded on.
Furnace brazing will be assembled in solder artifacts in heating furnace of welding, often need to add solder, also can use a reducing gas or inert gas protection, heat evenly. Mass production can be adopted when the continuous furnace.
Vacuum induction brazing furnace workpiece heating in vacuum chamber, is mainly used to request the product with high quality and ease of oxidation material welding.