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Idiomas disponibles
Idiomas disponibles
tungsten non-consumable electrode and the workpiece. The
high temperature (7000°C) burns off slags and thus allows
high quality welding using a limited quantity of heat.
The tungsten electrode is inserted into a torch designed for:
- transmitting the welding current to electrode
- protecting the electrode and the molten pool from oxidation
by a stream of inert gas flux (Argon) which flows around the
electrode and through the ceramic nozzle.
TIG WELDING SYSTEM (Fig. C)
On prepared thin thicknesses (up to 1mm ca.), welding may
be done without the filler rod, by the fusion of the edges of the
joint.
WITHOUT FILLER ROD (Fig. D)
For greater thicknesses it is necessary to use filler rods of the
same composition as the basic material. These must be of a
suitable diameter, with the edges properly prepared.
BUTT JOINT WITH OR WITHOUT FILLER ROD (Fig. E)
For a good weld it is important for the workpieces to be
accurately cleaned, with no oxides, oil, grease, solvents, etc.
remaining on the surface. It is necessary to sharpen the
tungsten electrode axially on the grinder wheel as indicated
below. Make sure that the tip is perfectly concentric in order to
avoid arc deviations. This operation should be repeated
periodically according to usage and wear, or if the electrode
is accidentally contaminated, oxidated or incorrectly used.
CHECK OF THE ELECTRODE TIP (Fig. F)
The diameter of the electrode is to be selected according to
the following tables taking into account that for the DC
welding (electrode negative), 2% thoriated Tungsten
electrodes (red colour code) are generally used. For AC
welding pure Tungsten electrodes (colour code green) are
usually used. It is most important in order to produce a good
weld that the proper electrode diameter is used with the
corresponding current.
WELDING PARAMETERS
ON STAINLESS STEEL (DC)
Thickness Current
ø Electrode ø Nozzle Argon øFiller Rod
(mm)
(A)
(mm)
0,5 - 0,8
15 - 30
1
30 - 60
1,5
70 - 100
2
90 - 110
3
120 - 150
1,6 - 2,4
4
140 - 190
5
190 - 250
2,4 - 3,2
WELDING PARAMETERS
ON DEOXIDA TED COPPER (DC)
Thickness Current
ø Electrode ø Nozzle Argon øFiller Rod
(mm)
(A)
(mm)
0,5 - 0,8
20 - 30
1
80 - 100
1,5
110 - 140
3
170 - 210
4
200 - 250
WELDING PARAMETERS
ON ALUMINIUM AND ITS ALLOYS (AC + HF) (AC+HF)
Thickness Current
ø Electrode ø Nozzle Argon øFiller Rod
(mm)
(A)
(mm)
1
30-45
1,5
60-85
1,6-2,4
2
70-90
(mm) (I/min)
1
6,5
3
1
6,5
3 - 4
1,6
9,5
3 - 4
1,6
9,5
4
9,5
5
2,4
9,5 - 11
5 - 6
11 - 12,5 6 - 7
(mm) (I/min)
1
6,5
4
1,6
9,5
6
1,6
9,5
8
2,4
11
10
3,2
11 - 12,5 10 - 12 2,4 - 3,2
(mm) (I/min)
1,6
6,5
4-6
9,5
4-6
2,4
9
4-6
3
110-160
5
180-240
6
220-300
The normal stick-out of the electrode from the ceramic nozzle
is 2-3mm and can reach up to 8mm for corner welding.
GAS CONNECTION
Connect the rubber hose from the back of the unit to the
pressure reducer, which should be mounted to the Argon
cylinder beforehand.
Open the cylinder and regulate the quantity of gas at each
application according to welding parameters (see welding
parameters table above), with a maximum of 15 l/min. Adjust
the gas flow if necessary while welding.
CHECK THE SEALS OF GAS HOSING AND ALL
CONNECTIONS.
TORCH CONNECTION
- The torch cable must be connected to the correct quick
connection (-) /
- Connect the three pole connector (torch pushbutton) to its
socket push right in and turn fully.
- Connect the torch gas hose to its connector and tighten
carefully WITHOUT USING WRENCHES.
- In case of water cooled torches, connect the 'BLUE' hose to
the delivery connector (cold water) of a WATER COOLING
SYSTEM and the 'RED' hose to the return connector (hot
water).
WORK CABLE CONNECTION
The work cable must be connected to the quick clamp (+ /
) while the collet on the other side must be connected to
the workpiece or to a work table as close as possible to the
joint.
WARNING !
The use of metallic components which are not part of the
workpiece, such as the return lead of the welding current,
can be dangerous and can result in poor welding.
REMOTE CONTROL
It is possible to connect a remote control to the 8 pole socket
(E) in order to regulate the welding current.
(mm)
On request, either manual or pedal-operated remote controls
---
are available. A device incorporated on the latter allows for
1
the starting and stopping of welding without using the torch
1,5
pushbutton.
1,5 - 2,0
On request is available also the remote control TIG-PULSE
2 - 3
which enables TIG welding with pulse direct current and
3
permits a remote control of the main parameters. By this
3 - 4
procedure and on special applications there are highlighted
some positive featuresof the TIG welding like :
small weld pool, better control of the heat input,limited
heating. Root runs, welds on thin thicknesses and/or in
position. Welding of metals easily cracked under heating.
Better control of penetration on the head-flat-horizontal joints
(mm)
without filler rod.
---
Possibility to execute better welds on pieces of various
1,5
thicknesses as well as of different steels (e.g. INOX and low
1,5
alloyed steels).
2
The maximum current value that the remote controls can
regulate is equal to the current value set on the
potentiometer of the unit.
(Fig. H)
1. Potentiometer ''lb'' : regulates intensity of the back ground
current (from 5A a
(mm)
2. Potentiometer ''lp'': regulates intensity of pulse current (
1,2-2,0
250A).
2
3. Potentiometer ''tp'' (with switch) : regulatespulse current
2
time (from 0.1 to 3s +/- 10%). When in OFF position the
- 13 -
2,4-3,2
11
5,6
3,2-4,0
11
6-9
4
12,5-16 8-12
(Fig. G)
<=
A2)
2
3
4
<=
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