Stel TIG μP 353H DC Manual De Instrucciones página 61

ENGLISH
TIG µP 353H DC
COD. 6903700030
Choosing the electrode.
The choice of the electrode diameter depends on the thickness of the material, the
type of joint and the welding position.
When welds in "position" are needed, the pool tends to slip due to gravity, so it is
recommended to use electrodes with a small diameter, making a series of passes.
For electrodes with a large diameter, high welding currents are needed, which
provide sufficient heat energy.
c) Setting the welding current.
Diametro elettrodo
mm
1.6
2
2.5
3.25
4
5
6
- The current stability of the generator allows working at low values and in
particularly difficult conditions.
The above table indicates the minimum and maximum current that may be used
for welding on carbon steel.
However, normally the data for welding with the various types of electrode are
provided by the manufacturer.
- Lighting the arc:
The electric arc is lit by rubbing the tip of the electrode on the part that is to be
welded, then quickly retracting the electrode until the arc is maintained.
If the movement is too slow it may cause the electrode to stick to the part, in this
case the electrode may be freed by pulling it to one side; on the other hand, if the
movement is too fast it may extinguish the arc.
- Making the weld:
There are many techniques for making the joints and they vary according to the
operator's requirements. Two classical methods will be studied as an example:
1) butt joint
STEL s.r.l. – Via del Progresso n° 59 – 36020
Loc. Castegnero (VICENZA) - ITALY
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail:stelgroup.com
http: www.stelgroup.it
TECHNICAL DESCRIPTION
Corrente di saldatura
min. max.
25 50
40 70
70 110
110 140
140 180
210 280
260 350
61
ENGLISH
TIG µP 353H DC
COD. 6903700030
Choosing the electrode.
The choice of the electrode diameter depends on the thickness of the material, the
type of joint and the welding position.
When welds in "position" are needed, the pool tends to slip due to gravity, so it is
recommended to use electrodes with a small diameter, making a series of passes.
For electrodes with a large diameter, high welding currents are needed, which
provide sufficient heat energy.
c) Setting the welding current.
Diametro elettrodo
mm
1.6
2
2.5
3.25
4
5
6
- The current stability of the generator allows working at low values and in
particularly difficult conditions.
The above table indicates the minimum and maximum current that may be used
for welding on carbon steel.
However, normally the data for welding with the various types of electrode are
provided by the manufacturer.
- Lighting the arc:
The electric arc is lit by rubbing the tip of the electrode on the part that is to be
welded, then quickly retracting the electrode until the arc is maintained.
If the movement is too slow it may cause the electrode to stick to the part, in this
case the electrode may be freed by pulling it to one side; on the other hand, if the
movement is too fast it may extinguish the arc.
- Making the weld:
There are many techniques for making the joints and they vary according to the
operator's requirements. Two classical methods will be studied as an example:
1) butt joint
STEL s.r.l. – Via del Progresso n° 59 – 36020
Loc. Castegnero (VICENZA) - ITALY
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail:stelgroup.com
http: www.stelgroup.it
TECHNICAL DESCRIPTION
Corrente di saldatura
min. max.
25 50
40 70
70 110
110 140
140 180
210 280
260 350
61