Lincoln Electric IM767 Common Metals, Joint Types and Positions, For Gmaw MIG Process, Butt Welds

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B-10

LEARNING TO WELD

B-10

For GMAW (MIG) Process

1.Is most of my welding performed on 16 gauge and lighter materials?

2.Can I afford the extra expense, space, and lack of portability required for gas cylinders and gas sup- ply?

3.Do I require clean, finished-looking welds?

If you have answered yes to all the above questions GMAW may be the process for you. If you have answered no to any of the above questions, then you should consider using the FCAW process.

For FCAW (Innershield) Process

1.Do I want simplicity and portability?

2.Will welding be performed outdoors or under windy conditions?

3.Do I require good all position welding capability?

4.Will most welding be performed on 16 gauge and heavier, somewhat rusty or dirty materials?

5.Weld must be cleaned prior to painting.

COMMON METALS

Most metals found around the farm, small shop or home are low carbon steel, sometimes referred to as mild steel. Typical items made with this type of steel include most sheet metal, plate, pipe and rolled shapes such as channels and angle irons. This type of steel can usually be easily welded without special pre- cautions. Some steels, however, contain higher car- bon levels or other alloys and are more difficult to weld. Basically, if a magnet sticks to the metal and you can easily cut the metal with a file, chances are good that the metal is mild steel and that you will be able to weld the material. In addition, aluminum and stainless steel can be welded using the K664-1 Aluminum Welding Kit. For further information on identifying various types of steels and other metals, and for proper procedures for welding them, we again suggest you purchase a copy of “New Lessons in Arc Welding”.

Regardless of the type of metal being welded, in order to get a quality weld, it is important that the metal is free of oil, paint, rust or other contaminant's.

JOINT TYPES AND POSITIONS

Five types of welding joints are: Butt Welds, Fillet Welds, Lap Welds, Edge Welds and Corner Welds. See Figure B.11.

Of these, the Butt Weld and Fillet Weld are the two most common welds.

Butt weld

Lap weld

Edge weld

Fillet weld

Corner weld

FIGURE B.11

Butt Welds

Place two plates side by side, leaving a space approx- imately one half the thickness of the metal between them in order to get deeper penetration.

Securely clamp or tack weld the plates at both ends, otherwise the heat will cause the plates to move apart. See Figure B.12.

Now weld the two plates together. Weld from left to right (if right handed). Point the wire electrode down in the crack between the two plates, keeping the gun slightly tilted in the direction of travel. Watch the molten metal to be sure it distributes itself evenly on both edges and in between the plates. This is referred to as the “pull technique”. On thin gauge sheet metal, use the “push technique”. See “Welding Techniques for GMAW (MIG) Process”.

WELDMARK 135 PLUS

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Contents Weldmark 135 Plus California Proposition 65 Warnings SafetyElectric Shock can kill Iii Welding 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 Technical Specifications Weldmark 135 Plus InstallationElectric Shock can kill Safety PrecautionsIdentify and Locate Components Stacking Work Clamp InstallationWork Cable Installation Select Suitable LocationGAS Connection GUN InstallationConnecting Gun Cable to the Weldmark 135 Plus Cable Input ConnectionsGas Solenoid Inlet Fitting InputRequirements For Maximum Output Code Requirements for Input ConnectionsRequirements For Rated Output Welding Sparks can cause fire or explosion Observe all safety information throughout this manualOperation Fumes and Gases can be dangerousWelding Capability Controls and SettingsDesign Features Advantages General DescriptionSequence of Operation Wire LoadingWelding Operations 4OPERATIONB-4 Friction Brake AdjustmentWire Threading Making a Weld Shielding GasProcess Guidelines Changing Machine Over to Feed Other Wire SizesCleaning Tip And Nozzle Thermal Protection Wire Feed Overload ProtectionOverload Protection Output OverloadSELF-SHIELDED Fcaw Welding ARC Learning to WeldLearning to Weld ARC-WELDING CircuitProcess Selection Gmaw MIG Welding ARCFor Fcaw Innershield Process Common MetalsJoint Types and Positions For Gmaw MIG 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 Weldmark 135 PLUS, use 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 Application Chart K586-1 Deluxe Adjustable Gas Regulator Hose Kit AccessoriesOptional Accessories Innershield Fcaw Conversion Replacement PartsRoutine and Periodic MAINTE- Nance MaintenanceMaintenance Safety Precautions Items Requiring no MaintenanceContact Tip Cable Liner Drive Roll GUN and Cable MaintenanceConfiguration of Components in Wire Feeding System For Magnum 100L GUNChanging Drive Roll Changing the Contact TIPLiner trim length for gun with red trigger Magnum 100L Changing LinerGUN Handle Parts HOW to USE Troubleshooting Guide TroubleshootingOutput Problems Troubleshooting GuideRecommended Course of Action Problems Possible Symptoms CauseGAS Flow Problems SP-135PLUSWIRINGWIRINGDIAGRAMDIAGRAMS Wiring DiagramsWeldmark 135 Plus Precaucion Warnung Manufactured by Lincoln Electric Company