Campbell Hausfeld WF2150 Instructions D'utilisation Et Manuel De Pièces page 7

Welding Guidelines
General
The WF2150 and WF2154 can utilize the
Flux Cored Arc Welding (FCAW) process.
The WG2160 and WG2164 can utilize the
Flux Cored Arc Welding (FCAW) process or
the Gas Metal Arc Welding (GMAW)
process. The weld must be protected
(shielded) from contaminants in the air
while it is molten. The FCAW process uses
a tubular wire with a flux material inside.
The flux creates a shielding gas when
melted. The GMAW process uses inert gas
to shield the weld while molten.
When current is produced by a
transformer (welding machine) and flows
through the circuit to the weld wire, an
arc is formed between the end of the
weld wire and the work piece. This arc
melts the wire and the work piece. The
melted metal of the weld wire flows into
the molten crater and forms a bond with
the work piece as shown (Figure 5).
Nozzle
Shielding Gas
Slag
Weld
Crater
Work Piece
Figure 5 - Weld Components
Arc Welding Basics
Six basic techniques affect weld
quality. These are: wire selection, heat
setting, weld angle, wire speed, travel
speed, and electrode extension. An
understanding of these techniques is
necessary for effective welds.
5º - 45º
WORK ANGLE
5º - 45º
TRAVEL ANGLE
Figure 6 - Weld Angle
Base
Metal
Normal Heat,
Wire Speed,
Travel Speed
Heat Too Low
Heat Too High
Figure 7 - Weld Appearance
HEAT SETTING
Contact Tip
The correct heat involves the adjustment
of the welding machine to the required
Flux
(Gasless only)
setting. Heat or voltage is regulated by a
Wire switch on the welder. The heat setting
used depends on the size (diameter) and
type of wire, position of the weld, and
the thickness of the work piece. Consult
specifications listed on the welder. It is
suggested that the welder practice with
scrap metal to adjust settings, and
compare welds with Figure 7.
WIRE TYPE AND SIZE
The correct choice of wire type involves
a variety of factors, such as welding
position, work piece material type,
thickness, and condition of surface to
be welded. The American Welding
Society, AWS, has set up certain
requirements for each type of wire.
FLUX-CORED WIRE
E - 7 0 T - GS
AWS E71T-GS or E71T-11 is
recommended for this welder.
Wire Speed
Too Fast
Weld strength, times
10,000 pounds per
square inch
Welding positions (0 for
flat or horizontal, 1 for
any position)
Tubular flux-cored wire
Flux type
7 7
Models WF2150, WF2154,
WG2160 and WG2164
Travel Speed
Wire Speed Too Slow
SOLID WIRE
ER - 70 S - 6
Weld strength, times
1,000 PSI
Solid wire
Wire composition
ER-70S6 is recommended for this welder.
WELD ANGLE
Weld angle is the angle at which the
nozzle is held during the welding
process. Using the correct angle ensures
proper penetration and bead formation.
As different welding positions and weld
joints become necessary, nozzle angle
becomes an increasingly important
factor in obtaining a satisfactory weld.
Weld angle involves two positions -
travel angle and work angle.
Travel angle is the angle in the line of
welding and may vary from 5º to 45º
from the vertical, depending on
welding conditions.
Work angle is the angle from horizontal,
measured at right angles to the line of
welding. For most applications, a 45º
travel angle and 45º work angle is
sufficient. For specific applications, consult
an arc welding handbook.
www.chpower.com
Travel
Speed
Too Fast
Too Slow