Luoyang HongtengIntermediate frequency induction furnace
The most common fault phenomenon in the use of a medium frequency furnace is that it cannot start normally. The following list of common reasons and detection methods for failure to start: 1. Thyristor breakdown, multimeter measurement, resistance are almost zero. 2. If the water-cooled cable is broken, the two ends can be stripped and connected to the two ends of the cable. If it can be started, it indicates that the cable is broken. Attention should be paid not to pull high power to avoid unnecessary danger caused by burning off the power cable with a high current. 3. The intermediate frequency transformer burns out. Measure the resistance of 1000V gear, which should be around 70. 4. Intermediate frequency output sintering, because the intermediate frequency output line is too small, the power has been lost in heat energy. 5. The harmonic current resistance of the current transformer burns out. 6. There is a problem with the inverter pulse transformer. 7. If the electric heating capacitor burns out, remove the copper bar and check it with a 1000V insulation resistance meter or a multimeter to see the charging and discharging. 8. The smelting furnace passes through the furnace and measures...
The biggest feature of induction heating is to heat the workpiece directly. Its advantages are good working conditions, fast heating of the workpiece, easy temperature control, no metal impurities, and small metal burnout during the heating process, so it is widely used. The main disadvantage of induction heating is the complexity of the equipment. At present, induction heating is mainly used for quenching, diathermy, smelting, brazing, and sintering in the machinery manufacturing industry and metallurgical industry. 1) Quenching is to heat the workpiece to a certain temperature and then quickly cool it down, so that the metallographic structure of the workpiece is changed to a certain extent, thereby increasing the hardness and wear resistance of the workpiece. However, the workpiece becomes brittle after quenching, and the fatigue resistance becomes worse. In order to solve this contradiction, surface quenching occurs, that is, only the metal surface is heated (without heating inside), and then quickly cooled down. In this way, the metal surface is quenched and the hardness and wear resistance of the workpiece is increased. Maintain a certain strength. Induction heating is the most ideal heating method for surface hardening. Due to the proximity effect and skin effect, during induction heating,...
1. One set of power supplies is equipped with one furnace body. This method has no spare furnace body, low investment, small floor space, high efficiency, and it is suitable for intermittent production. 2. One set of power supplies is equipped with two furnace bodies. In this way, the two furnace bodies can work alternately, and they are on standby for each other. Generally, the foundry shops adopt this configuration. A high-performance high-current furnace change switch can be selected between the two furnace bodies to switch, making the change more convenient. 3. N sets of power supplies are equipped with N+1 furnace bodies. In this way, multiple furnace bodies share a spare furnace body, which is suitable for use in workshops that require mass castings. High-performance high-current furnace changer switch can be used to switch the power supply between furnace bodies. 4. One set of power supply is equipped with two furnace bodies with different capacities and different purposes, one of which is for smelting and the other is for heat preservation. The furnace body has different capacities. For example, a set of 3000kW power supply is equipped with a 5t smelting furnace and a 20t holding furnace. A high-performance...
Many friends will probably think again before buying a melting furnace, “What size furnace do I need?” In fact, there are two ways to quickly find the furnace you want The first way is based on how much you want to produce per hour. When you know how much you can produce per hour, choose the same melting furnace as you want. For example, if you want to melt 2 tons of scrap in an hour, you choose a 2-ton furnace. Because under normal circumstances, melting furnace melting time is about 1 hour The second method is based on how much waste you want to melt at one time. When you want to melt 500kg of scrap at a time, you choose a 500kg furnace
1. The principle of intermediate frequency heating furnace is based on electromagnetic induction heating, following the effect theory of electromagnetic, such as electromagnetic ring effect, skin effect, sharp corner effect, proximity effect, diathermic effect, conduction effect, and so on. 2, Intermediate frequency heating furnace is mainly composed of frequency conversion device and induction coil, frequency conversion device will power frequency 50Hz alternating current into if 100Hz– 10000H alternating current, the three-phase power frequency alternating current into direct current after rectification, and then the direct current into adjustable if current, supply by the capacitor and the induction coil flow in the intermediate frequency alternating current, High-density magnetic field lines are generated in the induction ring, and the metal materials stored in the induction ring are cut to produce a large eddy current in the metal materials. 3. The frequency conversion device and induction coil of the intermediate frequency heating furnace make the heated metal material produce eddy current. This eddy current also has some properties of the intermediate frequency current, that is, the free electrons of the metal itself flow in the metal body with resistance to produce heat. , for example, put a metal cylinder has alternating medium frequency current...
Before changing rolls, check whether the online rolls are the rolls of the changed sorts, rolling varieties, and specifications; Scrub each sideways, roll flat head and inner hole of the sleeve, and apply clean grease after scrubbing. After the preparation work is completed, the rack can be replaced according to the roll replacement plan, and its working steps are as follows: 1. Turn off the cooling water of the rolling mill and dismantle the inlet and outlet guides. 2. Remove the water pipe joints of the upper and lower rolls. 3. Activate the hydraulic locking device for opening the rack. 4. Horizontal stand select “stand traversal” to advance the stand and move the rolling mill to the limit position on the operating side. (The vertical mill selects the “stand up/down” button to lower the stand and lower the mill to the lower limit position.) 5. Pull out the fixing pin of the flat headset bracket wrench and pull the bracket wrench to separate the flat head of the frame from the flat headset bracket. 6. Pull the “rack traversal” button of the horizontal rolling mill, Make the flat headcover bracket back, disengage the flat headcover from the roll flat head,...
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