Lincoln Electric IM725 manual Welding In The Vertical Position, Penetration, Fillet Welds

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LEARNING TO WELD

B-11

 

B-11

FIGURE B.12

Penetration

Unless a weld penetrates close to 100% of the metal thickness, a butt weld will be weaker than the material welded together. In the example shown in Figure B.13, the total weld is only half the thickness of the material thus the weld is only approximately half as strong as the metal.

45°

FIGURE B.15

Welding In The Vertical Position

Welding in the vertical position can be done either ver- tical-up or vertical-down. Vertical-up is used whenever

alarger, stronger weld is desired. Vertical-down is used primarily on sheet metal 5/32(3.9 mm) and under for fast, low penetrating welds.

FIGURE B.13

FIGURE B.14

In the example shown in Figure B.14, the joint has been welded so that 100% penetration could be achieved. The weld, if properly made, is as strong as or stronger than the original metal.

Fillet Welds

When welding fillet welds, it is very important to hold the wire electrode at a 45° angle between the two sides or the metal will not distribute itself evenly. The gun nozzle is generally formed at an angle to facilitate this. See Figure B.15.

WARNING

Use of this unit on thicker materials than recom- mended may result in poor welds. The welds may lookgood, but may just be sittingon top, of the plate. This is called Cold Castingand will result in weld failure.

Vertical-up And Overhead 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.

When welding out-of-position, run stringer beads. Dont whip, break the arc, move out of the puddle, or move too fast in any direction. Use Wire Feed Speed (WFS) in the low portion of the range. The general technique and proper gun angle is illustrated in Figure B.16.

Generally, keep the electrode nearly perpendicular to the joint as illustrated. The maximum angle above per- pendicular may be required if porosity becomes a problem.

SP-135 PLUS

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Contents Safety Depends on You SP-135 PlusSafety Electric Shock can kill Safety IiiSP-135 Plus Précautions DE Sûreté Sûreté Pour Soudage a L’ArcThank You Please Examine Carton and Equipment For Damage ImmediatelyTable of Contents Installation Technical Specifications SP-135 PlusSafety Precautions Identify and Locate ComponentsElectric Shock can kill Work Clamp Installation Work Cable InstallationSelect Suitable Location StackingGUN Installation Connecting Gun Cable to the SP-135GAS Connection PlusInput Connections Gas Solenoid Inlet FittingInput CableCode Requirements for Input Connections Requirements For Rated OutputRequirements For Maximum Output Observe all safety information throughout this manual OperationFumes and Gases can be dangerous Welding Sparks can cause fire or explosionControls and Settings Design Features AdvantagesGeneral Description Welding CapabilityWire Loading Welding OperationsSequence of Operation 4OPERATIONB-4 Shielding Gas Making a WeldChanging Machine Over to Feed Other Wire Sizes Cleaning Tip And NozzleProcess Guidelines Wire Feed Overload Protection Overload ProtectionOutput Overload Thermal ProtectionLearning to Weld Learning to WeldARC-WELDING Circuit SELF-SHIELDED Fcaw Welding ARCGmaw MIG Welding ARC Process SelectionCommon Metals Joint Types and PositionsFor Gmaw MIG Process For Fcaw Innershield ProcessWelding In The Vertical Position PenetrationFillet Welds Machine SET UP for the SELF-SHIELDED Fcaw Process Welding Techniques for the Self Shielded Fcaw ProcessVertical-down Welding Correct Welding PositionCorrect Electrical Stickout ESO Correct Welding SpeedHelpful Hints PracticeMachine SET UP for the Gmaw MIG Process Welding Techniques for the Gmaw MIG ProcessFigure B.24 Troubleshooting Welds To Eliminate a Ropy Convex Bead in order of importanceTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart Accessories Optional AccessoriesK586-1 Deluxe Adjustable Gas Regulator Hose Kit Replacement Parts Innershield Fcaw ConversionMaintenance Maintenance Safety PrecautionsItems Requiring no Maintenance Routine and Periodic MAINTE- NanceGUN and Cable Maintenance Configuration of Components in Wire Feeding SystemFor Magnum 100L GUN Contact Tip Cable Liner Drive RollChanging the Contact TIP Changing Drive RollChanging Liner GUN Handle PartsLiner trim length for gun with red trigger Magnum 100L Troubleshooting HOW to USE Troubleshooting GuideTroubleshooting Guide Problems Possible Areas Symptoms MisadjustmentsRecommended Course of Action Feeding Problems GAS Flow Problems Wiring DiagramsSP-135 Plus How To Read Shop Drawings New Lessons in Arc WeldingNeed Welding Training? $700.00Precaucion Warnung