18
Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
ARC WELDING
The consumable electrode is connected to a high amperage low voltage
supply which creates an electric arc between the electrode and the
workpiece.
Benefits over TIG welding include less experience needed and torch kit or
shielding gas are not required.
The most difficult aspect of the arc welding process, particularly for beginners,
is that of striking an arc. We strongly recommend that you practice on some
pieces of scrap metal to get the feel of the operation before you start an
actual welding job.
1. Holding the welding mask close-up to your face, give a short stroke with
the electrode on the workpiece. As soon as the arc is primed, withdraw the
electrode from the workpiece to leave a gap. The current will flow across
the gap with a crackling noise and a brilliant arc. Continue to weld in one
direction, maintaining the small gap as you go.
2. As soon as the arc is struck, maintain a distance from the workpiece equal
to the diameter of the electrode. Keep this distance as constant as
possible for the duration of the weld. As you advance along the workpiece
the angle of the electrode must be maintained at between 20º and 30º.
NOTE:
When you prime the arc be sure to withdraw the electrode swiftly
to leave the gap, otherwise the electrode will weld itself to the
workpiece. If this occurs give the electrode a short sharp jerk to
free it and, if necessary, prime the arc again. If you cannot free
the electrode, switch the machine off immediately and free it.
Take care the electrode will get red hot very quickly and will be
capable of burning through welding gloves.
WARNING: WHEN WELDING ALWAYS ENSURE THERE IS ADEQUATE
VENTILATION IN THE WORK AREA AS THE WELDING PROCESS GIVES OFF
TOXIC FUMES.
WARNING: DO NOT STRIKE THE ELECTRODE ON THE WORKPIECE, AS THIS
MAY DAMAGE THE ELECTRODE.
WARNING: WELDING ARCS PRODUCE HARMFUL UV/IR LIGHT WHICH CAN
SERIOUSLY DAMAGE YOUR EYES. ALWAYS USE A WELDING FACE-SHIELD
WITH A SUITABLE FILTER THAT CONFORMS TO CURRENT STANDARDS.
WARNING: NEVER LOOK AT THE ARC WITHOUT A SUITABLE WELDING
FACE-SHIELD
WARNING: PROTECT BYSTANDERS BY USING WELDING SCREENS/
CURTAINS.
Содержание 6012100
Страница 32: ......
