Campbell Hausfeld WF2058, WF2057 Welding Guidelines, Welding Positions, Weld Passes, Pull Push

Manual de Instruccones y Lista de Repuestos

Models WF2050, WF2054, WF2057 & WF2058

Welding Guidelines (Continued)

Nota: El ancho (A) del
reborde debe ser	A
aproximadamente el doble
del diámetro de la varilla de
electrodo que se use.	Metal Básico

Corriente, velocidad de
alimentación y velocidad de
desplazamiento normales	Velocidad muy rápida
Corriente muy baja	Velocidad muy lenta
Corriente muy alta	Velocidad de desplazamiento muy lenta

Velocidad de alimentación muy rápida

Figura 11 - Apariencia de la soldadura

air from reacting with the molten metal. Once the weld cools to the point that it is no longer glowing red, the slag can be removed. Removal is done with a chipping hammer. Lightly tap the slag with the hammer and break it loose from the weld bead. The final clean-up is done with a wire brush. When making multiple weld passes, 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 any of the others because welding speed can be increased, the molten metal has 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.

Other positions require different techniques such as a weaving pass, circular pass, and jogging. A higher skill level is required to complete these welds.

Overhead welding is the least desirable position as it is the most difficult and dangerous. Heat setting and wire selection will vary depending upon the position.

All work should be performed in the flat position if possible. For specific

applications, consult an arc welding technical manual.

WELD PASSES

Sometimes more then one pass is necessary to fill the joint. The root pass is first, followed by filler passes and the cover pass (See Fig. 8). If the pieces are thick, it may be necessary to bevel the edges that are joined at a 60º angle. Remember to remove the slag before each pass.

Cover

Filler

Root

Figure 8 - Fillet Welds (60˚ Bevel)

PUSH VS PULL TECHNIQUE

The type and thickness of the work piece dictate which way to point the gun nozzle. For thin materials (18 gauge and up), the nozzle should point out in front of the weld puddle and push the puddle across the workpiece. For thicker steel, the nozzle should point into the puddle to increase weld penetration. This is called backhand or pull technique (See Figure 10).

Figure 9 - Multiple Weld Passes

PULL

PUSH

Figure 10

Base metal

Normal heat, wire speed, travel speed

Heat too low

Heat too high

Wire speed too fast

Figure 11 - Weld Appearance

Travel speed too fast

Travel speed too low

Wire speed too slow

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