Principle and application of high frequency induction heating machine

A strong magnetic beam with instantaneous polarity change is generated in the high-frequency induction coil, and the metal that needs heat treatment is placed in the high-frequency coil, and the magnetic beam will penetrate the whole heated metal object. In the interior of the object heated by induction, a strong eddy current is produced in the opposite direction of the induction heating current. Because there is resistance in the metal heated by induction, a strong Joule heat energy is generated, which makes the temperature of the object heated by induction rise rapidly, so as to achieve the purpose of heat treatment. Therefore, high frequency induction heating machine in the industry, also known as: high frequency induction heating equipment; High and medium frequency induction hardening equipment; Induction diathermy equipment; High frequency quenching machine, high frequency induction heating machine, high frequency welding machine.

Main uses:

The main uses of high frequency induction heating machine are: metal heat treatment, metal quenching, metal annealing, metal tempering, metal diathermy, metal brazing, silver welding, copper welding, metal heat mold, metal melting, metal embedding plastic, etc.

characteristic:

High frequency induction heating machine adopts IGBT power amplifier, soft switch resonance double regulation and frequency automatic tracking system, MOSFET device and unique frequency conversion technology, which makes high frequency operation stable. The high frequency induction heating machine has constant current and power control function, which greatly optimizes the metal heating process.

Under the same conditions, the high frequency induction heating machine can save 50% power compared with the traditional high frequency electron tube heating equipment, without high frequency radiation and interference. Reduced power load and power capacity, with 100% full load design, high frequency induction heating machine can work 24 hours continuously.

High frequency induction heating machine, with automatic heating, heat preservation, cooling three time function setting, is conducive to improve the heating quality of high frequency induction heating machine, simplify the manual operation. The higher the high frequency frequency, the shallower the heating depth, the lower the high frequency, and the better the heat permeability. Induction heating machine 1 ~ 20kHz high frequency automatic tracking

Adapt to the industry

The main application fields are: high frequency induction welding, high frequency induction heat treatment, high frequency induction metal melting, etc. Such as: welding of carbide saw blade, diamond cutter, drilling tool, turning tool, planer, milling cutter, reamer and other cutting tools; Heat treatment of standard parts, bolts, power tools, hardware tools and hand tools; Pliers, spanners, screwdrivers, hammers, axes, auto parts, crankshafts, connecting rods, piston pins, crank pins, sprockets, camshaft, valves, various rocker arms and rocker shafts; High frequency quenching treatment for various gears, spline shafts, transmission half shafts, small shafts and shifting forks in the gearbox.

Installation steps of high frequency induction heating machine:

1) Place the main and auxiliary machines: generally, the main machine (operation control machine) is placed on the top and the auxiliary machine (power output machine) is placed on the bottom.

2) Connect the water and electricity supply of the main and auxiliary machines: connect the waterways in a straight up and down way with the two thin water pipes in the accessories. Then connect the circuit with two cables in the accessories, red to red and black to black. Be sure to tighten, no bad contact. Connect the ground wire of the main and auxiliary machines.

3) Power connection: This machine is a three-phase power supply mode (380V). Connect three red wires to the special three-phase knife switch or air switch (above 65A). Connect the ground wire again.

4) Water connection: the cooling water pressure of this machine is 0.1mpa-0.3mpa (about 1-3kg). Please select a 370W single-phase (220V) water pump and a water tank or pool (depending on the continuous working time and workload, select the volume, and install a small cooling tower if necessary). The water outlet of the water pump is connected with the water inlet of the machine by a water pipe, and the return water of the machine is returned to the pool by a water pipe to realize the circulating cooling of the water flow.

5) Installation of induction ring: select, install and fix induction ring according to the shape and size of heated metal workpiece. Note that the induction coil should not be short circuited.

6) Put in the workpiece: put the workpiece to be heated into the center of the induction ring, the gap around should be basically the same, and the workpiece and the induction ring should not collide.

Operation steps:

1) Water supply: start the water pump and observe whether the water flow at the outlet is normal.

2) Power on: first close the knife switch, then turn on the air switch at the back of the machine, and then turn on the power switch on the control panel.

3) Setting: select the operation mode (full-automatic, semi-automatic, manual and foot control) according to the needs, and set the heating time, heat preservation time and cooling time in the automatic and semi-automatic control (each time can not be set to 0, otherwise the normal automatic circulation cannot be achieved). Before the first use and not proficient, should choose manual or foot control mode.

4) Start up: the heating power potentiometer should be adjusted to the minimum before each start-up, and then slowly adjusted to the required power after the start-up. Press the start button to start the machine. At this time, the heating indicator light on the panel will be on. At the same time, there will be a normal working sound and the working light will flash synchronously.

5) Observation and temperature measurement: in the heating process, it is mainly to determine when to stop heating by visual inspection according to experience. Inexperienced operators can use temperature controller to detect the temperature of the workpiece.

6) Stop: when the temperature reaches the requirement, press the stop button to stop heating. After the workpiece is replaced, it can be started again.

7) Power off: the machine can work continuously for 24 hours. Turn off the power switch when not in use. Turn off the knife switch or the air switch after the machine when not in use for a long time. When the machine is shut down, the power supply should be cut off first and then the water supply should be cut off, so as to facilitate the internal heat of the machine and the heat emission of the induction coil.

Note: the machine should not work without load as far as possible, and it can not run without load for a long time, otherwise, the performance and stability of the machine will be affected!

maintain:

When using in places with poor air environment, dust should be prevented from entering the machine, and no water should be splashed into the machine. Keep the cooling water clean and change it regularly. Keep air circulation in high temperature environment