Lincoln Electric IM546 manual Welding In The Vertical Position, Vertical-down Welding

Page 29

 

LEARNING TO WELD

 

B-15

FIGURE B.23

FIGURE B.24

45°

Welding In The Vertical Position

Welding in the vertical position can be done either ver- tical-up or vertical-down. Vertical-up is used whenev- era larger, 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. Donʼt 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.24.

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.

PROPER GUN ANGLE

PROPER GUN ANGLE

FOR GMAW PROCESS

FOR FCAW PROCESS

WELDING IN THE VERTICAL UP POSITION

WELDING IN THE VERTICAL UP POSITION

Vertical-down Welding

Refer to Figure B.25 Vertical-down welds are applied at a fast pace. These welds are therefore shallow and narrow and, as such, are excellent for sheet metal. Vertical-down welds may be applied to 5/32” (3.9 mm) and lighter material.

Use stringer beads and tip the gun in the direction of travel so the arc force helps hold the molten metal in the joint. Move as fast as possible consistent with desired bead shape.

The important thing is to continue lowering the entire arm as the weld is made so the angle of the gun does not change. Move the electrode wire fast enough that the slag does not catch up with the arc. Vertical-down welding gives thin, shallow welds. It should not be used on heavy material where large welds are required.

FIGURE B.25

WELD-PAK 100

Image 29
Contents WELD-PAK 100 Plus Safety Depends on YouARC Welding can be hazardous SafetyCylinder may explode if damaged Iii Electric and Magnetic FieldsSûreté Pour Soudage a LʼArc Précautions DE SûretéPlease Examine Carton and Equipment For Damage Immediately Master Table of Contents for ALL Sections Vii Technical Specifications WELD-PAK INSTALLATIONA-1Identify and Locate Components 2INSTALLATIONSafety Precautions Select Suitable Location INSTALLATIONA-3Output Connections StackingGUN Installation 4INSTALLATIONWork Cable Installation Connecting Gun Cable to the WELD-PAKFigure A.5 INSTALLATIONA-5Input Connections 6INSTALLATIONRequirements For Rated Output Code Requirements for Input ConnectionsOPERATIONB-1 Observe all safety information throughout this manualFumes and Gases can be dangerous Welding Sparks can cause fire or explosion2OPERATION OPERATIONB-3 Wire LoadingWelding Operations Sequence of Operation4OPERATION Friction Brake AdjustmentWire Threading OPERATIONB-5 Cleaning Tip And NozzleProcess Guidelines Making a Weld6OPERATION Changing Machine Over to Feed Other Wire SizesWelding with Gmaw MIG Overload ProtectionLearning to Weld Learning to WeldARC-WELDING Circuit SELF-SHIELDED Fcaw Welding ARCFor Gmaw MIG Process Gmaw MIG Welding ARCProcess Selection Common Metals Machine SET UP for the SELF-SHIELDED Fcaw ProcessWelding Techniques for the SELF- Shielded Fcaw Process For Fcaw Innershield ProcessCorrect Welding Speed Correct Electrical Stickout ESOHelpful Hints Electrode Voltage Setting Wire Feed Speed ooPractice Back-SteppingWelding Techniques for the Gmaw MIG Process Machine SET UP for the Gmaw MIG ProcessElectrode Voltage Setting Wire Feed Speed ooMild Steel Penetration Joint Types and PositionsButt Welds Fillet WeldsVertical-down Welding Welding In The Vertical PositionTo Eliminate a Ropy Convex Bead in order of importance Troubleshooting WeldsTo Correct Poor Penetration in order of impor- tance To Eliminate Stubbing* in order of importanceProper Gun Handling Application Chart MIG Conversion ACCESSORIESC-1Optional Accessories 2NOTES Routine Maintenance MAINTENANCED-1Maintenance Safety Precautions GUN and Cable Maintenance 2MAINTENANCEComponent Replacement Procedures For Magnum 100L GUNChanging Drive Roll MAINTENANCED-3Liner trim length 4MAINTENANCEChanging Liner GUN Handle Parts MAINTENANCED-56NOTES HOW to USE Troubleshooting Guide TROUBLESHOOTINGE-1Troubleshooting Guide 2TROUBLESHOOTINGProblems Possible Areas Symptoms Misadjustments Recommended Course of ActionFeeding Problems TROUBLESHOOTINGE-3Welding Problems 4TROUBLESHOOTING100 Wiring DiagramsWeldpak 100 Wiring Diagram 2NOTES Parts WELD-PAK2PARTS Main Exploded DiagramDescription Reqʼd 4PARTS Complete Drive ASSEMBLY/MOTORPARTS5 Case Front Assembly6PARTS RECTIFIER, FAN and Bracket AssemblyPARTS7 Center Panel Assembly8PARTS Magnum 100L AssemblySquare Wave TIG Square Wave TIG New Lessons in Arc Welding How To Read Shop DrawingsNeed Welding Training? $700.00Precaucion Guards off Superseded