Lincoln Electric UWW-170 manual Welding In The Vertical Position, Penetration, Fillet Welds

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	B-10		LEARNING TO WELD		B-10

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.

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.

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.

WARNING

Use of this unit on thicker materials than recom- mended may result in poor welds. The welds may “look” good, but may just be “sitting” on top, of the plate. This is called “Cold Casting” and 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. Don’t 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 170-I

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Contents SP 170-I and UWW-170 California 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 Installation Electric Shock can kill 2INSTALLATIONA-2Safety Precautions Identify and Locate ComponentsStacking Select Suitable LocationLimitations Output ConnectionsGAS Connection GUN InstallationWork Cable Installation Connecting Gun Cable to the SPInput Connections Power Input Cable230 50/60 Line Cord ConnectionGeneral Description Design Features AdvantagesOperational Features and Controls OperationWelding Capability Controls and SettingsSequence of Operation Wire LoadingFriction Brake Adjustment Welding OperationsFigure B.4 Making a Weld Cleaning Tip And NozzleProcess Guidelines Overload Protection Changing Machine Over to Feed Other Wire SizesWelding with Gmaw MIG SELF-SHIELDED Fcaw Welding ARC Learning to WeldLearning to Weld ARC-WELDING CircuitFor Gmaw MIG Process Gmaw MIG Welding ARCProcess Selection Butt Welds Common MetalsJoint Types and Positions For Fcaw Innershield ProcessFillet Welds Welding In The Vertical PositionPenetration Correct Welding Position Machine SET UP for the SELF-SHIELDED Fcaw ProcessWelding Techniques for the SELF- Shielded Fcaw Process Vertical-down WeldingCorrect Welding Speed Correct Electrical Stickout ESOPractice Helpful HintsWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessFor the SP 170-I, use the following To Eliminate Stubbing* in order of importance Troubleshooting WeldsTo Eliminate a Ropy Convex Bead in order of importance To Correct Poor Penetration in order of impor- tanceProper Gun Handling Drive Roll Orientation Application ChartOutput Polarity K491 .045 1.2 mm Innershield Welding Kit AccessoriesOptional Accessories K464 .035 0.9 mm Innershield Welding KitInnershield Fcaw Conversion Replacement PartsRoutine Maintenance MaintenanceMaintenance Safety Precautions Contact Tip Cable Liner Drive Roll GUN and Cable MaintenanceConfiguration of Components in Wire Feeding System Gun Cable CleaningChanging Drive Roll UWW-170 only Component Replacement ProceduresChanging Drive Roll SP 170-I only Fully seat the liner bushing into the con Changing LinerGUN Handle Parts red trigger GUN Handle Parts black triggerHOW to USE Troubleshooting Guide TroubleshootingRecommended Course of Action Problems Possible Areas Symptoms MisadjustmentsGAS Flow Problems Welding Problems Wiring WiringPage $700.00 How To Read Shop DrawingsNew Lessons in Arc Welding Need Welding Training?Precaucion Warnung