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Idiomas disponibles
Idiomas disponibles
GB
NO GAS WELDING
In the "NO GAS welding" the torch is connected
to the negative pole and the ground cable to the
positive pole. By gas welding the shielding gas is
used to protect the weld pool from oxidation and
porosity. By NO GAS welding this protection is
given by a special wire called "flux cored wire",
this technique simplifies the use of these machines
compared to the machines with standard wire, on
which the gas flow must be adjusted separately.
PREPARATION FOR WELDING
•
Connect the welding machine to the 230V
50/60Hz line;
IMPORTANT: make sure that the polarity of
torch and ground cable is correctly set (FIG.5).
For NO GAS welding the ground cable must
be connected to the positive terminal (+),
while the torch must be connected to the
negative terminal (-) (FIG.5).
•
Connect the ground cable to the workpiece
and make sure that the contact is good;
•
Make sure that the wire-feeding roll is cor-
rectly positioned (groove matching the wire
diameter). Note that each roll has two groo-
ves one marked by 0.9mm and the other
marked by 0.7mm.
ADVANTAGES OF NO GAS WELDING
•
There is no need for gas cylinders.
•
Welding outdoors is easier because there
are fewer chances that wind blows away the
shielding gas.
•
Welding time is about 50% less compared to
the normal electrode welding.
•
The learning time for the operator is very
short.
•
Minimum waste of welding material.
•
Most important, this process allows to com-
plete the welding more quickly and efficien-
tly.
•
Less heat, less distortion.
•
Possibility to weld thin materials.
WELDING PROCEDURES
•
Your welding power source has four or six
positions for the regulation of the current in
the various conditions.
•
The choice of the position for the welding is
determined by the thickness of the material
to weld.
•
Also the gas flow rate is determined by the
thickness of the material to weld.
•
For the adjustment of the power source make
reference to the graphs and of the following
pages.
20
REFERENCE TABLE FOR MODELS WITH
FOUR POSITIONS FOR REGULATION
STEEL - 0.6 MM GAS WELDING WIRE
WORKPIECE
WELDING
THICKNESS
POSITION
(mm)
A
0.6 - 0.8
1
0.8 - 1.0
1
1.0 - 2.0
2
2.0 - 3.0
2
STEEL - 0.8 MM GAS WELDING WIRE
WORKPIECE
WELDING
THICKNESS
POSITION
(mm)
A
0.6 - 0.8
1
0.8 - 1.0
2
1.0 - 2.0
2
2.0 - 3.0
2
ALUMINIUM - 0.8MM GAS WELDING WIRE
WORKPIECE
WELDING
THICKNESS
POSITION
(mm)
A
0.8
1
1.0 - 2.0
2
2.0 - 3.0
2
SOFT STEEL - 0.9 MM WIRE
NO-GAS WELDING
WORKPIECE
WELDING
THICKNESS
POSITION
(mm)
A
0.6 - 0.8
1
0.8 - 1.0
1
1.0 - 1.2
2
1.2 - 2.0
2
WIRE SPEED
ADJUSTMENT
B
C
MIN
LOW
MAX
MEDIUM
MIN
MEDIUM
MAX
ALTA
WIRE SPEED
ADJUSTMENT
B
C
MAX
LOW
MIN
MEDIUM
MAX
MEDIUM
MAX
HIGH
WIRE SPEED
ADJUSTMENT
B
C
MIN
MEDIUM
MIN
MEDIUM
MAX
HIGH
WIRE SPEED
ADJUSTMENT
B
C
MIN
LOW
MAX
MEDIUM
MIN
MEDIUM
MAX
HIGH
Tab.1
Fig. 7
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