Lincoln Electric IM10074 manual Vertical-Up Welding, Vertical-Down Welding

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OPERATION

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Vertical-Up Welding

The problem, when welding vertical-up, is to put the molten metal where it is wanted and make it stay there. If too much molten metal is deposited, gravity will pull it downwards and make it “drip”. Therefore, a certain technique has to be followed:

Long arc

Short arc

NOTE: Holder end of electrode is lower than arc.

1.Use 1/8” (3.2mm) 90-115 amps or 3/32” (2.5mm) 70 amps AWS 6011.

2.When welding, the electrode should be kept hori- zontal or pointing slightly upwards. (See drawing above).

3.The arc is struck and metal deposited at the bot- tom of the two pieces to be welded together.

4.Before too much molten metal is deposited, the arc is SLOWLY moved 1/2-3/4” (12-20mm) upwards. This takes the heat away from the molten puddle, which solidifies. (If the arc is not taken away soon enough, too much metal will be deposited, and it will “drip”.)

5.The upward motion of the arc is caused by a very slight wrist motion. Most definitely, the arm must not move in and out, as this makes the entire process very complicated and difficult to learn.

6.If the upward motion of the arc is done correctly with a wrist motion, the arc will automatically become a long arc that deposits little or no metal. (See drawing above.)

7.During this entire process, the ONLY thing to watch is the molten metal. As soon as it has solidi- fied, the arc is SLOWLY brought back, and another few drops of metal are deposited. DO NOT  FOL-

LOW THE UP AND DOWN MOVEMENT OF THE ARC WITH YOUR EYES. KEEP THEM ON THE MOLTEN METAL.

8.When the arc is brought back to the now solidified puddle, IT MUST BE SHORT, otherwise no metal will be deposited, the puddle will melt again, and it will “drip”.

9.It is important to realize that the process consists of SLOW, DELIBERATE movements. There are no fast motions.

Vertical-Down Welding

Vertical-down welds are applied at a fast pace. These welds are therefore shallow and narrow, and are excellent for sheet metal. Do not use the vertical-down technique on heavy metal. The welds will not be strong enough.

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

2.On thin metal use 70-75 amps.

(14 ga. 75 A - 16 ga. 60 A.)

3.Hold the electrode in a 30-45° angle with the tip of the electrode pointing upwards.

4.Hold a VERY SHORT arc, but do not let the elec- trode touch the metal.

5. An up and down whipping

Very

short

motion will help prevent

arc

burn-through on very thin plate.

30°-40°

 

6. Watch the molten metal carefully.

The important thing is to continue lowering the entire arm as the weld is made so the angle of the electrode does not change. Move the electrode fast enough so that the slag does not catch up with the arc.

bULLDOG™ 5500

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Contents Bulldog Safety Depends on YouCalifornia Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding and Cutting Sparks can Cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE SûretéOn-Line Product Registration Please Examine Carton and Equipment For Damage ImmediatelyTable of Contents Installation Engine Exhaust can kill Safety PrecautionsLocation and Ventilation StoringOIL PRE-OPERATION Engine ServiceStacking TiltingHour Meter Electrical Output ConnectionsWelding CAbLE Connections TAbLE A.1 Recommended Welding CAbLE SIzE and LengthMachine Grounding 5INSTALLATIONA-5Auxiliary Power Receptacles Electrical ConnectionsCircuit bREAKERS Premises WiringTAbLE A.2 Electrical Device USE with this ProductType Common Electrical Devices Possible Concerns Operation Limitations WELDER/GENERATOR ControlsOutput Panel Controls Gasoline Engine Controls Engine OperationStarting the Engine BEFORE Starting the EngineLOW OIL Sensing Generator OperationStopping the Engine Running the EngineTAbLE b.1 Generator Power ApplicationsAfter YOU Finish the Weld Welding OperationControl Function / Operation Current Control Dial To USE the bULLDOG 5500 for WeldingWelding APPLICATIONS/ELECTRODE Selection Guide Material Thickness Electrode Type Size SettingWelding Guidelines TAbLE b.2Welding circuit for Stick shielded metal arc welding What Happens in the Arc?Correct Welding Speed Correct Welding PositionCorrect Way to Strike An Arc Correct Arc LengthPractice Common MetalsTypes of Welds Welding in the Vertical Position Fillet JointsPenetration Multiple Pass WeldsVertical-Down Welding Vertical-Up WeldingWelding Sheet Metal How to Hardface the Sharp Edge Metal to Ground WearOverhead Welding Hardfacing To Reduce WearCast Iron Plate Preparation Welding Cast IronSelecting Electrodes Out-of-Position Group AWS E6011 High-Speed Group AWS E6013Low Hydrogen Group AWS E7018 Accessories OPTIONS/ACCESSORIESLincoln Electric Accessories Maintenance Routine and Periodic MaintenanceEngine Maintenance Figure D.2 Clean Area Engine AdjustmentsPart Kohler Engine Maintenance PartsSpark Plug Service Operational ClearanceFigure D.6. bRUSH Removal and Replacement GENERATOR/WELDER MaintenanceFigure D.7. Major Component Locations 1TROUbLESHOOTINGE-1 Symptoms PRObLEMS POSSIbLETROUbLESHOOTING Engine requires service to head, head gasket, and/or valves Diagrams M22563 Dimension PrintBULLDOG Precaucion Warnung
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