Electrode Welding Phases - Stel TIG μP 261H 1f Manual De Instrucciones

TIG µP 261H - 263H
TECHNICAL DESCRIPTION
viscosity of the pool and the high degree of penetration. They need generators
with suitable properties.
6.2- ELECTRODE WELDING PHASES (MMA)
- Preparatory phase:
a) Preparation of the edges to be welded.
The preparation of the edges varies according to the thickness of the material to
be welded, the welding position, the type of joint and the working requirements.
However, it is always advisable to work on clean parts, free from oxide, or without
rust or other substances that could damage the weld.
The edges can be prepared with "U" section calking for a weld without rewelding;
with "X" section calking when rewelding of the reverse weld is needed.
- Table for preparing "U" shaped edges.
s (mm) a (mm)
0÷3 0
3÷6 0
6÷12 0÷1.5
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.
- The current stability of the generator allows working at low values and in
particularly difficult conditions.
The following 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
56
ENGLISH
COD. 6907600050
d (mm) α (°)
0 0
b)
s/2 MAX 0
Choosing
0÷2 >60 the
electrode.
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
TIG µP 261H - 263H
TECHNICAL DESCRIPTION
viscosity of the pool and the high degree of penetration. They need generators
with suitable properties.
6.2- ELECTRODE WELDING PHASES (MMA)
- Preparatory phase:
a) Preparation of the edges to be welded.
The preparation of the edges varies according to the thickness of the material to
be welded, the welding position, the type of joint and the working requirements.
However, it is always advisable to work on clean parts, free from oxide, or without
rust or other substances that could damage the weld.
The edges can be prepared with "U" section calking for a weld without rewelding;
with "X" section calking when rewelding of the reverse weld is needed.
- Table for preparing "U" shaped edges.
s (mm) a (mm)
0÷3 0
3÷6 0
6÷12 0÷1.5
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.
- The current stability of the generator allows working at low values and in
particularly difficult conditions.
The following 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
56
ENGLISH
COD. 6907600050
d (mm) α (°)
0 0
b)
s/2 MAX 0
Choosing
0÷2 >60 the
electrode.
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