IGBT 120kw Gear High Frequency induction hardening quenching
machine
1. Brief introduction of induction hardening machine
High-frequency quenching is mostly used for surface quenching of
industrial metal parts. It is a metal heat treatment method that
generates a certain induced current on the surface of the
workpiece, rapidly heats the surface of the part, and then rapidly
quenches it. Induction heating equipment, that is, equipment for
induction heating of workpieces for surface quenching.
2. Technical Parameter of High Frequency Induction Hardening
Quenching Machine:
Working voltage | 380V/50HZ |
Voltage range | 340V-420V |
DC power | 120KW |
DC current | 130A |
Oscillation frequency | 18-35KHZ |
Efficiency | 90% |
Duty cycle | 100% |
Weight | 230KG |
Dimension | 600*480*1360mm,800*500*580mm |
Cooling water flow | 0.2MPa-45L/Min,0.2MPa-55L/Min |
3. Induction Quenching Hardening Machine Application:
Where is induction hardening used?
Induction is used to harden numerous components. For example:
gears, crankshafts, camshafts, drive shafts, output shafts, torsion
bars, rocker arms, CV joints, tulips, valves, rock drills, slewing
rings, inner and outer races.
(1) For auto parts and motorcycle parts hardening.
(2) For machinery parts, like gears, transmission wheels, axles,
shafts, spline shafts, ball stud hardening.
(3) For machine tools quenching, like guide rail machine tools
hardening.
(4) For spanner, pliers, CNC machines, hammer, axe hardening etc.
4. What are the advantages of induction hardening?
Induction heating equipment, that is, equipment for induction
heating of workpieces for surface quenching. The principle of
induction heating: the workpiece is placed in the inductor, and the
inductor is generally a hollow copper tube inputting intermediate
frequency or high frequency alternating current (1000-300000Hz or
higher). The alternating magnetic field generates an induced
current of the same frequency in the workpiece. The distribution of
this induced current in the workpiece is uneven, it is strong on
the surface, but weak in the interior, and it is close to 0 in the
center. This skin effect is used. , the surface of the workpiece
can be heated rapidly, and the surface temperature rises to
800-1000ºC within a few seconds, while the temperature of the core
changes very little.
How to choose induction hardeing equipment?
Selection of induction heating frequency: The frequency is selected
according to the requirements of heat treatment and heating depth.
The higher the frequency, the shallower the heating depth.
1. The depth of high-frequency (above 10KHZ) heating is 0.5-2.5mm,
which is generally used for the heating of small and medium-sized
parts, such as small-module gears and small and medium-sized shaft
parts.
2. the intermediate frequency (1~10KHZ) heating depth is 2-10mm,
which is generally used for the heating of shafts with large
diameters and gears with large and medium modules.
3. The depth of the hardened layer by power frequency (50HZ)
heating is 10-20mm, which is generally used for diathermy of
larger-sized parts and surface quenching of large-diameter parts
(diameter above 300mm, such as rolls, etc.).
Application of induction heating surface quenching: The comparison
with ordinary heating and quenching is as follows:
1. The heating speed is extremely fast, which can expand the
transformation temperature range of the A body and shorten the
transformation time.
2. After quenching, the surface layer of the workpiece can obtain
extremely fine cryptocrystalline martensite, and the hardness is
slightly higher (2-3HRC). Lower brittleness and higher fatigue
strength.
3. The workpieces treated by this process are not easy to be
oxidized and decarburized, and even some workpieces can be directly
assembled and used after treatment.
4. The hardened layer is deep, easy to control and operate, easy to
realize mechanization and automation.
