Campbell Hausfeld WS2800 Operating Instructions & Parts Manual page 6

Operating Instructions and Parts Manual
Shielded Metal Arc Welder
When current (amperage) flows electrode is brought straight down and
through the circuit to the electrode, an tapped on the work piece.
arc is formed between the end of the
With the scratching method, drag the
electrode and the work piece. The arc
electrode at an angle along the surface
melts the electrode and the work
much like striking a match. Regardless
piece. The melted metal of the
of method, upon contact with the
electrode flows into the molten crater
plate, immediately raise the electrode
and forms a bond with the work piece
a distance equal to the diameter of the
as shown.
electrode or it will stick to the surface.
Always hold the electrode pointed into
Wire
the weld.
Flux
Note: Should the electrode stick to the
Slag
work piece, break it loose by quickly
Weld twisting or bending at the holder while
Work piece
pulling upward. If the electrode does
not break loose, disengage the
electrode by releasing it from the
holder.
Figure 9 - Weld Components Crater
Arc Welding Basics
Five basic techniques affect weld
Note: Discontinue using and discard
quality. These are: electrode selection,
electrodes that burn down to 1 to 2
current setting, weld angle, arc length,
inches from the electrode holder.
and travel speed. Proper implementation
Striking an Arc of these techniques is necessary for
good weld quality.
Place the bare end of the electrode in
the holder. Grip the holder lightly to
Electrode Type and Size
reduce tiring of the hand and arm.
The correct choice of electrode type
Note: Always keep the jaws of the
involves a variety of factors, such as
holder clean to insure good electrical
welding position, work piece material
contact with the electrode.
type, thickness, and condition of
Be careful not to
WARNING surface to be welded. The American
!
touch the work
Welding Society, AWS, has set up
piece or welding bench with the
certain requirements for each type of
electrode as this causes arc flashes.
electrode.
There are two methods which can be
All electrodes are classified into five
used to start or strike the arc; the
main groups: mild steel, high-carbon
tapping method and the scratching
steel, special alloy steel, cast iron, and
method. In the tapping method, the
nonferrous such as aluminum. The
AWS Electrode Classification
E - 6 0 1 3
Same as
electrode
diameter
Same as
electrode
diameter
Figure 10 - Striking An Arc
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majority of arc welding is done with
the electrodes in the mild steel group.
The electrode material should corres-
pond with the work piece material.
Flux coatings are made for use with
either AC (alternating current), DC
(direct current) reverse polarity, or DC
straight polarity, although some
function well on both AC and DC
current.
Commonly Used Electrodes
1. E-6011 Deep Penetrating
• The strong arc force and rapid
solidification of the metal makes
vertical and overhead welding
easier with this rod.
• Where time does not permit rust,
scale or paint removal, this rod
penetrates rapidly and easily.
• Acceptable for AC or DC welding
current (reverse polarity).
2. E-6013 General Purpose
• All position, smooth deposit rod
with low spatter.
• For all mild steel and general
purpose work.
• Acceptable for AC or DC welding
current (straight or reverse
polarity).
3. E-7014 Iron Powder
• A general purpose "drag" rod for
all positions.
• Ideal for situations where fit
between metal pieces is poor.
• The iron powder in the flux coating
combines with the filler rod to
make a smooth deposit with very
little spatter.
• Ideal for ornamental work.
• Acceptable for AC or DC welding
E = Electrode
current (reverse polarity).
60= Mild steel
4. E-7018 Low Hydrogen
70= High strength Steel
• An all position high strength
1 = Electrode can be used electrode designed to produce low
hydrogen content combined with
in all positions
excellent mechanical properties.
2 = Electrode is restricted
• Acceptable for AC or DC welding
for use in flat or
current (reverse polarity).
horizontal position
only
Flux type
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Modelo WS2800
paso para soldar. Primero deberá hacer
un paso primordial, éste será seguido
por pasos adicionales de relleno (vea la
Fig. 8 y 9). Si las piezas son gruesas, tal
vez sea necesario biselar los bordes
que están unidos en un ángulo de 60º .
Recuerde que deberá limpiar las
escorias antes de cada paso.
Nota: El ancho (A) del reborde debe ser
aproximadamente el doble del diámetro de
la varilla de electrodo que se use.
Corriente, longitud del arco y
velocidad normales
Corriente muy baja
Corriente muy alta
Figura 14 - Apariencia de la soldadura
Metal Básico
Velocidad muy rápida
Velocidad muy lenta
Longitud del arco muy larga
Longitud del arco muy corta
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