Idiomas disponibles
Idiomas disponibles
During heating:
■ Do not hold metal objects (other than the workpiece) close to
the inductor.
■ Keep a distance of at least 1 metre from the inductor.
■ Never use a metal strap to support workpieces/inductor or
suspend them in the magnetic field. High currents could start
running through the strap, causing it to heat up.
■ Never remove the inductor from the workpiece.
■ Never disconnect the inductor from the generator.
2.4 Safety provisions
■ The generator can be set to switch off, if it does not detect a
rise in the temperature of the workpiece for a period of time
preset by the manufacturer.
■ If the power through the inductor is too high, it will be
automatically reduced by the generator or the generator will be
switched off completely.
■ The generator will normally not switch on if there is no
workpiece in the inductor.
■ If no inductor has been connected or if only one of the cables
has been connected, the inductor will not switch on.
■ If the inductor coil (fixed versions) gets too hot, the generator
switches off.
■ If the generator becomes too hot or threatens to do so, the
controller automatically regulates the power to find a balance
so that the generator remains in operation without switching
off thermally. If this is no longer possible, the heating process
is switched off.
■ Connect the grounding cable supplied to the workpiece when
using inductors in order to compensate any differences in
potential that may be caused by the induction. This helps
prevent errors in the temperature measurement.
NOTE!
This is not a safety grounding.
Check whether the use of this cable is permitted for the workpiece
in question. The magnetisation induced by the magnet is larger
than 2 A/cm.
Schaeffler Technologies
3. Introduction
3.1 Application
The Schaeffler MF-GENERATOR consists of a generator, 2
temperature sensors, heat resistant gloves. Inductors are ordered
separately. The generator is designed for the connection of
inductors used for heating ferromagnetic workpieces. Suitable
materials include iron, steel, stainless steel, titanium and certain
bronze alloys.
The maximum capacity workpieces can be subjected to is 10kW,
22kW or 44kW, depending on the type of heater.
3.2 Principle of operation
The three-phase voltage is rectified and smoothed. This rectified
voltage is then converted by means of an inverter into an AC
voltage with a frequency between 10 and 25 kHz. The power is
then applied to the workpiece magnetically via a "resonance
capacitor" using an inductor (coil).
Since the frequency is relatively high, the penetrating depth of
the magnetic field is not too large, so that only the outer layer of
the workpiece is heated.
This principle makes heating using medium frequency particularly
suitable for dismantling purposes, such as removing bearing
rings from shafts.
3.3 Operating conditions
■ Use indoors only.
■ At an ambient temperature from 0 to 40ºC.
■ At a relative humidity between 5 and 90%, non-condensing.
■ Use in a dry, clean industrial working environment.
■ Extreme contamination of the air due to moisture (steam),
dust, oil and chemicals is not permitted.
3.4 Demands on the users
■ The user must master the language in which the manual is
written in order to interpret it correctly. In addition, he or she
has basic technical knowledge.
■ The user must not be a wearer of active or passive medical
aids or implants, such as a pacemaker or hearing aid.
3.5 Inadvisable use
■ Schaeffler inductors are made from materials selected with
the greatest care. Do not use self-made inductors or inductors
from other manufacturers. This can result in dangerous
situations or damage to the generator.
■ Generator and inductor(s) are matched. Only use the inductors
included in the scope of delivery or inductors produced by the
manufacturer and suited for the generator.
■ Do not switch on the generator and inductor if the inductor is
not in or around the object to be heated. Workpieces must not
be heated to above the maximum temperature of the inductors
as this may damage the inductors. The maximum operating
temperature is always indicated on a Schaeffler inductor.
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