Intermediate frequency forging furnace for standard fasteners

The intermediate frequency forging heating furnace for standard fasteners is often used for diathermy before forging of large bars. Bars of various materials can be used. For the specific diameter of the bar, please contact our technical manager, and we will make it for you according to the diameter of the bar. For suitable sensors, please call 13806806709. We are willing to become a long-term partner with you!

The main features of the intermediate frequency power supply are as follows:

1. Repeated start function to realize the start-up method. It adopts the sweep-type zero-voltage soft start method in the form of self-excitation. During the whole start-up process, the frequency regulation system and current, and the voltage regulation close the system, and track the change of the load at all times. Ideal soft start, this kind of starting method has little impact on the thyristor, which is beneficial to prolong the service life of the thyristor, and has the advantage of easy starting for both light and heavy loads, especially when the steelmaking furnace is full and the freezing furnace can be easily started.

2. Cutting-edge technology and good energy-saving effect The control circuit adopts a microcomputer constant power processing circuit system, and an inverter Ф angle automatic adjustment circuit is installed. During the operation process, it will automatically monitor the changes of voltage, current and frequency at any time, and From this, the change of the load is judged, and the matching of the load impedance will be automatically adjusted to achieve constant power output, thereby achieving the purpose of saving time and electricity and improving the power factor.

3. The perfect design makes the circuit work reliably. Because the control circuit adopts CPLD software design, the program input is completed by the computer, which has high pulse precision, anti-interference, fast response speed, convenient debugging, and has the functions of current cutoff, cutoff voltage, overpass Current, overvoltage, undervoltage, phase loss, water shortage, and many other protection functions, because each circuit element always works within a safe range, thus greatly improving the service life of the equipment.

Fourth, the device can automatically judge the phase sequence of the three-phase incoming line, without the need to distinguish the phase sequence of A, B, and C, and the debugging is extremely convenient.

5. The software used in the program is imported from the United States. The production of the circuit board is all automatic wave soldering, and there is no virtual soldering phenomenon. All kinds of adjustment systems adopt non-contact electronic adjustment, no fault points, extremely low failure rate, and extremely convenient operation. .

6. High-frequency equipment has obvious energy saving and low power grid pollution.

The thyristor intermediate frequency power supply adopts ISP industrial module control, full digital operation, reliable hardware and software protection, complete functions, suitable for metal smelting, heat preservation, heat penetration, metal heat treatment, quenching, sintering and other occasions. The load consists of an induction coil and a compensation capacitor, which are connected to form a parallel resonant circuit.

The basic working principle of the thyristor intermediate frequency power supply is to rectify the 50Hz power frequency AC current into DC through a three-phase bridge rectifier circuit, and then filter it through a filter (DC reactor). It becomes a single-phase intermediate frequency AC to supply the load, so this inverter is actually an AC-DC-AC converter.

In the thyristor static inverter circuit, the three-phase power frequency power supply is stepped down by the transformer and supplied to the inverter. In the inverter, the three-phase bridge semi-controlled full-wave rectification is first performed, and then filtered by the reactor to obtain the DC power supply. , the DC power is converted into a frequency-variable intermediate frequency power supply through a single-phase bridge inverter, which is supplied to the induction furnace.

1. Rectification: The three-phase alternating current (380V) is rectified into direct current through the three-phase bridge full-wave rectification circuit.

2. Filtering: After being filtered by the reactor, a DC power supply with a stable waveform is obtained and supplied to the inverter.

3. Inverter: The filtered DC power is turned on and off by the single-phase bridge inverter circuit, using the thyristor to turn on and off, so that the DC power becomes an intermediate frequency current with adjustable frequency.

The working principle of the intermediate frequency power supply is as follows: using a three-phase bridge-type fully-controlled rectifier circuit to rectify the alternating current into direct current, after smoothing by the reactor, it becomes a constant direct current source, and then through the single-phase inverter bridge, the direct current is inverted. A single-phase intermediate frequency current of a certain frequency (usually 1000 to 8000 Hz). The load consists of an induction coil and a compensation capacitor, which are connected to form a parallel resonant circuit.