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A |
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Alternate current, generator (AC)
- output current in sinusoidal form. It is obtained
through a transformer, which turns the mains current
into a current suitable for welding.
Amperometer- it measures
the output current of the generator.
Anti-sticking - device that
switches off welding power source if the electrode
sticks to the material being welded, so that it can be
removed manually.
Arc force - device that
prevents short-circuit.. |
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B |
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Base metal - metal being
welded. |
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C |
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Coated electrode - metal
stick consisting of a core (which conducts the current
and supplies welding material) and a coating (which
protects the weld pool and stabilises the electric arc).
Current - measured in
Ampere, quantity of electricity flowing every second in
a wire of a determined section
Current, regulation field -
indicator of minimum and maximum current supplied by a
generator. |
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D |
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Direct current, generator (DC)
- output current in form of continuous wave, obtained
through the rectifier, placed downstream of the
tranformer, which converts alternate current into direct
current. Typical of the inverters
Duty Cycle - working cycle
of the generator, expressed in percentage, before
reaching thermostatic protection. |
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E |
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Electric arc - area where
the current between electrode and base material flows. |
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H |
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Hertz -
Frequency-measurement unit.
High Frequency HF -
Frequency higher than 10,000 Hertz.
HF ignition - arc ignition
through a high-frequency impulse. The spark is generated
by a high-frequency generator.
Hot start - Device that
eases electric arc ignition. |
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M |
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Mains fuse - device that
cuts off mains power supply in case of excessive current
absorption.
Microprocessor - high
performance small sized electronic device that can be
programmed to carry out many functions. |
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O |
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Open circuit voltage - it
is the voltage, expressed in Volts, measured at the
power outlets of the generator, when the circuit
(welding, cutting, charging) is open, i.e. there is no
current circulation. |
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P |
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Pilot arc ignition -
ignition of the pilot arc by high-frequency spark
operating in the circuit of the pilot arc itself.
Pulsed current, generator -
pulsed current is obtained superimposing to direct base
current another component, usually a square wave form,
to produce a periodic pulsation of the arc.
Pulsed arc, transfer - can
be obtained from pulsed current generators.
The pulses cause the detachment of small drops of
material and the consequent formation of the spray arc. |
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R |
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Reverse polarity connection
- the electrode holder gun (torch) is connected to the
positive pole of the welding generator, whereas the
earth clamp is connected to the negative pole. |
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S |
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Short arc, transfer -
welding material transferred in the weld pool through
small drops which create continuous short-circuits.
Suitable for welding thin pieces.
Synergic, generator - by an
appropriate knob, all welding parameters are adjusted.
All the parameters previously set by the producer can be
recalled according to the work to carry out
Solid wire - metal wire in
coils used as welding material, protection of weld pool
being provided by the gas from the gas cylinder.
Straight polarity connection
- the electrode holder gun (torch) is connected to the
negative pole of the welding generator, whereas the
earth clamp is connected to the positive pole.
Scratch ignition - spark
started by rubbing the electrode on the welding
material. |
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T |
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Tubular wire - metal wire
in coils, used both as welding material and for the
protection of the weld pool (no-gas welding, additional
gas cylinder not necessary). |
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W |
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Welding material -
electrode, wire or stick, to fill the joint. |
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