Electrode Welding Phases - Stel TIG μP 353H DC Manual De Instrucciones

TECHNICAL DESCRIPTION
current, with the electrode on the positive pole (inverse polarity), even though
there are basic electrodes for alternating current. Basic coatings are very greedy
for humidity, so they must be kept in a dry place, in well closed boxes.
It must also be remembered that steels with a carbon content of more than 0.6%
must be welded with special electrodes.
- Cellulose coatings. These are electrodes that weld with direct current, connected
to the positive pole; they are essentially used for welding pipes, on account of the
viscosity of the pool and the high degree of penetration. They need generators
with suitable properties.
5.2- 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)
b)
0÷3 0
3÷6 0
6÷12 0÷1.5
60
ENGLISH
TIG µP 353H DC
COD. 6903700030
d (mm) ß (°)
0 0
s/2 MAX 0
0÷2 >60
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
current, with the electrode on the positive pole (inverse polarity), even though
there are basic electrodes for alternating current. Basic coatings are very greedy
for humidity, so they must be kept in a dry place, in well closed boxes.
It must also be remembered that steels with a carbon content of more than 0.6%
must be welded with special electrodes.
- Cellulose coatings. These are electrodes that weld with direct current, connected
to the positive pole; they are essentially used for welding pipes, on account of the
viscosity of the pool and the high degree of penetration. They need generators
with suitable properties.
5.2- 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)
b)
0÷3 0
3÷6 0
6÷12 0÷1.5
60
ENGLISH
TIG µP 353H DC
COD. 6903700030
d (mm) ß (°)
0 0
s/2 MAX 0
0÷2 >60
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