Campbell Hausfeld WF2050 Operating Instructions & Parts Manual page 7

Manual de Instruccones y Lista de Repuestos
Nota: El ancho (A) del
reborde debe ser A
aproximadamente el doble
del diámetro de la varilla de
electrodo que se use.
Corriente, velocidad de
alimentación y velocidad de
desplazamiento normales
Corriente muy baja
Corriente muy alta
Velocidad de alimentación muy rápida
Figura 11 - Apariencia de la soldadura
Metal Básico
Velocidad muy rápida
Velocidad muy lenta
Velocidad de desplazamiento muy lenta
34 Sp
Models WF2050, WF2054, WF2057 & WF2058
Welding Guidelines
(Continued)
applications, consult an arc welding
air from reacting with the molten metal.
technical manual.
Once the weld cools to the point that it
is no longer glowing red, the slag can be
WELD PASSES
removed. Removal is done with a
Sometimes more then one pass is
chipping hammer. Lightly tap the slag
necessary to fill the joint. The root pass is
with the hammer and break it loose
first, followed by filler passes and the
from the weld bead. The final clean-up is
cover pass (See Fig. 8). If the pieces are
done with a wire brush. When making
thick, it may be necessary to bevel the
multiple weld passes, remove the slag
edges that are joined at a 60º angle.
before each pass.
Remember to remove the slag before
each pass.
WELDING POSITIONS
Four basic welding positions can be used;
flat, horizontal, vertical, and overhead.
Welding in the flat position is easier than
Filler
any of the others because welding speed
can be increased, the molten metal has
Root
less tendency to run, better penetration
can be achieved, and the work is less
fatiguing. Welding is performed with
the wire at a 45º travel angle and 45º
work angle.
Figure 8 - Fillet Welds (60˚ Bevel)
Other positions require different
techniques such as a weaving pass, PUSH VS PULL TECHNIQUE
circular pass, and jogging. A higher skill
The type and thickness of the work piece
level is required to complete these welds.
dictate which way to point the gun
nozzle. For thin materials (18 gauge and
Overhead welding is the least desirable
up), the nozzle should point out in front
position as it is the most difficult and
of the weld puddle and push the puddle
dangerous. Heat setting and wire
across the workpiece. For thicker steel,
selection will vary depending upon the
the nozzle should point into the puddle
position.
to increase weld penetration. This is
All work should be performed in the flat
called backhand or pull technique (See
position if possible. For specific
Figure 10).
Normal heat, wire speed,
travel speed
Heat too low
Heat too high
Wire speed too fast
Figure 11 - Weld Appearance
Cover
Figure 9 - Multiple Weld Passes
PULL
Figure 10
Base metal
Travel speed too fast
Travel speed too low
Wire speed too slow
www.chpower.com
7
PUSH