Lincoln Electric 4000 manual Overhead Welding, Welding Sheet Metal, Hardfacing To Reduce Wear

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B-17

OPERATION

B-17

 

 

 

Overhead Welding

Various techniques are used for overhead welding. However, in the interest of simplicity for the inexperi- enced welder, the following technique will probably take care of his needs for overhead welding:

1.Use 1/8” (3.2mm) 90-105 A or 3/32” (2.5mm) 70 A AWS 6011 electrode on AC.

2.Put the electrode in he holder so it sticks straight out.

3.Hold the electrode at an angle approximately 30° off vertical, both seen from the side and seen from end. (See drawing below.)

Side View

End View

30° 30°

It is important to hold a VERY SHORT arc. (A long arc will result in falling molten metal; a short arc will make the metal stay.)

If necessary, and this is dictated by the appearance of the molten puddle, a slight back and forth whipping technique may be used to prevent “dripping”.

Welding Sheet Metal

Welding sheet metal presents an additional problem- burn through. Follow these simple rules:

1.Hold a very short arc. This, together with the prop- er travel speed, will eliminate burn through.

2.Use 1/8” (3.2mm) or 3/32” (2.5mm) AWS 6011.

3.Use low amperage. 75 A for 1/8” (3.2mm) elec- trode, 70 A for 3/32” (2.5mm) electrode.

4.Move rapidly enough to stay ahead of the molten slag. A whipping technique may be used to further minimize burn through.

5.If you have a choice, use lap joints rather than fil- lets or butts; the double thickness effect of a lap joint makes it much easier to weld without burning through.

Hardfacing (To Reduce Wear)

There are several kinds of wear. The two most often encountered are:

1.Metal to Ground Wear: Plowshares, bulldozer blades, buckets, cultivator shares, and other metal parts moving in the soil.

2.Metal to Metal Wear: Trunnions, shafts, rollers and idlers, crane and mine car wheels, etc.

Each of these types of wear demands a different kind of hardfacing electrode.

When applying the proper electrode, the service life of the part will in most cases be more than double. For instance, hardfacing of plowshares results in 3-5 times more acreage plowed.

How to Hardface the Sharp Edge (Metal to Ground Wear)

1.Grind the share, approximately one inch along the edge, so the metal is bright and clean.

2.Place the share on an incline of approximately 20-30°. The easiest way to do this is to put one end of the share on a brick. (See drawings) Most users will want to hardface the underside of the share, but some might find that the wear is on the top side. The important thing is to hardface the side that wears.

3.Use 1/8” (3.2mm) Wearshield at 80-100 A. Strike the arc about one inch from the sharp edge.

POWER-ARC 4000

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Contents POWER-ARC Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion IiiPrécautions DE Sûreté Please Examine Carton and Equipment For Damage Immediately On-Line Product RegistrationMaster Table of Contents for ALL Sections Installation Technical Specifications POWER-ARCSafety Precautions Location and VentilationStoring Engine Exhaust can killPRE-OPERATION Engine Service Power-Arc 4000 Typical Fuel Consumption Muffler DeflectorSpark Arrester 8 HP Carb. Certified 9 HP Honda 9 HP Kool Bore PlusCable Size and Length Electrical Output ConnectionsWelding Cable Connections Auxiliary Power Receptacles Cable InstallationMachine Grounding Plugs and HAND-HELD EquipmentPremises Wiring Circuit BreakersTable A.2 Electrical Device USE with the POWER-ARC Type Common Electrical Devices Possible ConcernsSafety Instructions OperationOperating Instructions General DescriptionOperational Features and Controls Design Features AdvantagesRecommended Applications Welding CapabilityControls and Settings GENERATOR/WELDER ControlsGasoline Engine Controls Starting the Engine Engine OperationBefore Starting the Engine BREAK-IN Period Stopping the EngineRunning the Engine Generator Operation General InformationTable B.3 Generator Power Applications Welding Operation Control Function / Operation Current Control DialMaterial Thickness Electrode Type Size Setting Welding GuidelinesStick Welding What Happens in the Arc? Welding arcCorrect Welding Speed Correct Welding Position Correct Arc LengthCorrect Way to Strike An Arc Common Metals Types of WeldsUse the following Do the followingPenetration Fillet WeldsMultiple Pass Welds Welding in the Vertical PositionVertical-Up Welding Vertical-Down WeldingHow to Hardface the Sharp Edge Metal to Ground Wear Overhead WeldingWelding Sheet Metal Hardfacing To Reduce WearWelding Cast Iron Cast Iron Plate PreparationSelecting Electrodes Out-of-Position Group AWS E6011High-Speed Group AWS E6013 Low Hydrogen Group Stable-Arc E7018Lincoln Electric Accessories AccessoriesOPTIONS/ACCESSORIES Maintenance Routine and Periodic MaintenanceEngine Maintenance Engine AdjustmentsFigure D.2 Clean Rotating SCREEN/FINGER GUARD/DEBRIS Guard Honda Table D.1 Engine Maintenance PartsPart GENERATOR/WELDER Maintenance Figure D.5. Brush Removal and ReplacementFigure D.6. Major Component Locations Troubleshooting HOW to USE Troubleshooting GuideSymptoms Possible AreasTroubleshooting Engine requires service to head, head gasket, and/or valves Diagrams Wiring Diagram Power ARC 4000 Codes 10671 4000 POWER-ARC POWER-ARC Precaucion Warnung
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