Heatline
Induction heating is not just distinguished through the cost
reduction, but also by speed, precision and the repeat accuracy.
Also under consideration of ecological aspects the induction heating
offers compared to fossil fuel- or resistance heating key benefits. We
are able to heat nearly all electrical conducting material with
induction heating: copper, aluminium, brass, steel (also stainless
steel), titan, and even more.
Especially in the field of induction hardening we have reached results
which can not be achieved with conventional techniques: For example the
contour hardening of gear-parts, tooth-wheels or other
high-sophisticated parts in the automotive industry.
EFD uses its international patented the multi-frequency technique,
which is supplying high and medium frequency to one work piece at the
same time trough one induction coil. Thereby it is possible to hard
complex contours and work piece geometries. A further special process,
which was successfully developed by EFD, is the hardening of large
bearing rings without any remaining soft-zone on the runway.
Because of the fast heating, especially in case of induction hardening
– the change of dimension, distortion deformations are reduced to an
acceptable minimum value – almost zero. So in many cases finished work
pieces can be inductive hardened, and it is not necessary to refinish
them.
To avoid a potential scaled or coloured surface of the work piece,
heating under protective atmosphere is possible.
A further advantage of inductive heating, compared to gas is, the lapse
of most of the radiant heat, what results an unwanted heating nearby
the main heating zone. Most of the time gas torches are permanent
operated, what raises the consumption and that results in higher costs.
Induction heating generators on the other hand just take energy for the
moment of heating. The energy is regional focused and mostly limited to
the sphere of the inductor. As an further advantage, the high
effectiveness can mentioned. So the processes can be done more
ecological and economical.
The heat contribution at induction heating is not just reduced to the
surface, like when heating with a torch. The inductive heating acts
because of the magnetic force fields and the frequency dependent
penetration depth in the work piece. With this mechanism we bring the
energy to the place where it is required – inside the work piece.
Inductive heating processes are computer monitorable, full
controllable, and reproduceable. This gives us the possibility of
process data documentation and the reproducibility of the heating
cycle.
Induction heating processes are controllable over a standard machine
control-system via analogue signals, line-PLC, Siemens-Controls,
profi-bus or Ethernet.
For simple heating tasks manual operation of the induction equipment is
always possible. This offers intervention in the process and let the
user all liberties.
The induction heating generators from EFD are mainly equipped with
rugged IGBT transistor, which are available on the free market. These
components we successfully run in our medium- and high