Campbell Hausfeld WG2045 manual Slag Removal FLUX-CORED Wire only, Welding Positions, Weld Passes

! WARNING

Model WG2040, WG2044, WG2045, WG3000

Welding Guidelines (Continued)

Factors such as diameter and type of weld wire, amperage, position, and work piece material thickness all effect the speed of travel necessary for completing a good weld (See Fig. 15). When the speed is too fast, the bead is narrow and bead ripples are pointed as shown. When the speed is too slow, the weld metal piles up and the bead is high and wide. For Aluminum, travel speed is typically faster.

SLAG REMOVAL (FLUX-CORED WIRE ONLY)

Wear ANSI approved safety

glasses (ANSI Standard Z87.1) and protective clothing when removing slag. Hot, flying debris can cause personal injury to anyone in the area.

After completing the weld, wait for the welded sections to cool. A protective coating called slag now covers the weld bead which prevents contaminants in the 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. 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 for gasless process.

Cover

Filler

Root

Figure 16 - Weld Passes

Figure 17 - Multiple Weld Passes

ALUMINUM WELDING

Any aluminum surface to be welded, must be cleaned thoroughly with a

stainless steel brush to eliminate any oxidation on the weld and grounding surface. 100% Argon shielding gas must be used when welding aluminum. If 100% Argon is not used, metal penetration is unlikely. A Teflon® wire liner, smooth-groove drive roller and aluminum contact tips are recommended when welding aluminum. Campbell Hausfeld offers these parts in Kit WT2530. Call 800-746- 5641 to order.

PUSH VS PULL TECHNIQUE

The type and thickness of the work piece dictates which way to point the gun nozzle. For thin materials (18 gauge and up) and all aluminum, 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 18).

PULL

PUSH

Figure 18

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