Lincoln Electric 5000 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 5000

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Contents Safety Depends on You Power ARCCalifornia Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding Sparks can cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéPlease Examine Carton and Equipment For Damage Immediately Thank YouTable of Contents Technical Specifications Power ARC InstallationSafety Precautions Location and VentilationStoring Stacking TiltingLifting Assembly of Wheels and Handle to the Tube Frame OIL PRE-OPERATION Engine ServiceFuel Spark ArresterWelding Cable Connections Electrical Output ConnectionsAuxiliary Power Receptacles Cable InstallationMachine Grounding Premises Wiring Power Cord Connections to TWIST- Lock PlugsPlugs and HAND-HELD Equipment Circuit BreakersThese Devices Without Operation Safety InstructionsOperating Instructions General DescriptionRecommended Applications Welding CapabilityLimitations GENERATOR/WELDER Controls Controls and SettingsGasoline Engine Controls Figure B.2 Gasoline Engine ControlsEngine Operation Before Starting the EngineStarting the Engine BREAK-IN Period Stopping the EngineFor a HOT Engine For Best Engine StartingTo USE the Generator AS AN Auxiliary Power Supply Generator OperationGeneral Information Suggested Power Applications Running Watts Start-up Watts Table B.3 Generator Power ApplicationsWelding Operation To USE the Power ARC 5000 for Stick WeldingControl Function / Operation Current Control Dial After YOU Finish the WeldWelding Guidelines Stick Welding Figure B.4 The welding arc What Happens in the Arc?Correct Welding Position Correct Arc Length Correct Way to Strike An ArcCorrect Welding Speed Practice Common MetalsTypes of Welds Fillet Welds PenetrationMultiple Pass Welds Welding in the Vertical PositionVertical-Down Welding Vertical-Up WeldingOverhead Welding How to Hardface the Sharp Edge Metal to Ground WearWelding Sheet Metal Hardfacing To Reduce WearCast Iron Plate Preparation Welding Cast IronOut-of-Position Group AWS E6011 Selecting ElectrodesHigh-Speed Group AWS E6013 Low Hydrogen Group Stable-Arc E7018OPTIONS/ACCESSORIES AccessoriesLincoln Electric Accessories Briggs and Stratton AccessoriesRoutine and Periodic Maintenance MaintenanceEngine Maintenance Engine AdjustmentsClean AIR Filter PRE-CLEANER Figure D.3 Clean Cooling SystemPart Part Number Table D.2 Engine Maintenance PartsFigure D.6. Brush Removal and Replacement GENERATOR/WELDER MaintenanceFigure D.7. Major Component Locations Troubleshooting SymptomsPossible Areas Generator POWER, Always Not RUN Engine Without AN Wiring Diagram Power ARC DiagramsDimension Print New Lessons in Arc Welding How To Read Shop DrawingsNeed Welding Training? Basic CoursePrecaucion Warnung
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