Craftsman 196.20569 owner manual Special Welding Methods, Three Passes TJont n Li, Three Passes

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NOTE: WHEN USING SELF-SHIELDING FLUX-CORE WIRE it is very important to thoroughly chip and brush the slag off each completed weld bead before making another pass or the next pass will be of poor quality.

of a continuous weld bead. There are three methods of spot welding: Burn-Through, Punch and Fill, and Lap (see Figure 20). Each has advantages and disadvantages depending on the specific application as well as personal preference.

Figure 18. Butt Joints

Fillet Weld Joints. Most fillet weld joints, on metals of moderate to heavy thickness, will require multiple pass welds to produce a

strong joint. The illustrations in Figure 19 show the sequence of laying multiple pass beads into a T fillet joint and a lap fillet joint.

i

Lap Joint Welded

I _ In Three Passes

_ __ TJont n

li_,_ _ Three Passes (

Figure 19. Fillet Weld Joints

SPECIAL WELDING METHODS

SPOT WELDING

The purpose of a spot weld is to join pieces of metal together with a spot of weld instead 20

PUNCH AND FILL _

LAP SPOT

BURN THROUGH

Figure 20. Spot Welding

. The BURN-THROUGH METHOD welds two overlapped pieces of metal together by burning through the top piece and into the bottom piece.

With the burn-through method, larger wire diameters tend to work better than smaller diameters because they have greater cur- rent carrying capabilities allowing the arc to burn through very quickly while leaving a minimal amount of filler metal build up. Wire diameters that tend to work best, with the burn-through method, are 0.030 inch diameter solid wire or 0.035 inch self-shielding flux-core wire.

Do not use 0.024 inch diameter solid or 0.030 inch self-shielding fiux-core wires when using the burn-through method unless the metal is VERY thin or excessive filler metal build-up and minimal penetration is acceptable.

Always select the HIGH heat setting with the burn-through method and tune in the wire speed prior to making a spot weld.

,The PUNCH AND FILL METHOD

produces a weld with the most finished appearance of the three spot weld methods. In this method, a hole is punched or drilled into the top piece of metal and the arc is directed through the hole to penetrate into the bottom piece. The puddle is allowed to fill up the hole leaving a spot weld that is smooth and flush with the surface of the top piece.

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Contents Jcraftsmani Assemble Shield Installing Handle Feet Selecting Shielding GasMaintenance Important Safety Information Retain These Instructions for Future ReferenceElectric Shock can Killi To reduce Shock HazardFlash Hazards AGE! To reduce the risk of death, injury, or Fire HazardsFire or Explosion can Cause DEATH, INJURY, and Property DAM Compressed Gasses and Equipment Hazards Improper Handling Maintenance of Compressed GASFume Hazards Temperatures above 130F will require Additional Safety InformationWelder Operating Internal Thermal ProtectionDescription Duty CycleHandle Power Source Connection Packing ListSelecting Shielding GAS Installing the HandleInstalling the Feet TOR if OIL, GREASE, or Damage are Present Check the GAS FlowPressed Gasses and Equipment Install the Welding Wire Cord from the ac power source before installing wireDrive Roller Electric shock can kill! Always turnRight Way SET the Wire Drive Tension Change PolarityHolding the GUN Controls AndindicatorsLearning to Weld Welding Techniques Angle aAngle B Distance from the Work PieceTypes of Weld Beads Welding PositionsOverhead Position Multiple Pass WeldingSpecial Welding Methods Three Passes TJont n Li, Three PassesElectric shock can kill! To reduce the risk Consumable MaintenanceSpot Welding Instructions Replace a GUN Liner GUN AssemblyMaintaining the Nozzle Troubleshooting Preventive MaintenanceCleaning the nozzle, and occasionally Trouble Possible Cause Possible Remedy Low output or non- enetrating weld£.J Description Qty 66J Page Wire Feed Welder Model 196.205690 GUN Description QtySuggested Settings for Welder Riesgos Riesgos DestelloRiesgos De Vapores Informaci6n Adicional de SeguridadNota Informacion Importante DE SeguridadConservar Estas Instrucciones Para Referencia Futura Riesgos DE Choque Electrico Destellos PeligrososAdvertencia Riegos DE IncendioILA Manipulacion O EL Mantenimiento Riesgos DE VaporesRiesgos DE Gases Comprimidos Y DE SUS Equipos Informacion Adicional DE Seguridad Descripcin Caracteristicas DE Operacion DE LA SoldadoraProteccion Tirmica Interna Ciclo DE FuncionamientoCordbn de Suministro Elctrico Cordbn de Soldadura La acumulaci6nElectrico Lista DE ContenidoEnsamblaje DE LA Careta Para Soldar Instalacicn DEL ASAInstalaciin DE LAS Patas Seleccibn del gas para soldar con alambre de aceroVerificacin DEL Flujo DE GAS Seleccion del Gas para Soldar Acero InoxidableINSTALACI6N DEL GAS Protector No Instalar EL Regulador SI Tiene ACEITE, Grasa O DanosDesengancharlo AUN Instalacion DEL Alambre SoldadorAlineamiento Y Regulacin DEL Rodillo DE Avance Figura PrecaucinPrecaucin Regulacion DE LA Tensin DEL Mecanismo DE AvanceCambio DE Polaridad Controles E Indicadores Ilas Descargas Elictricas PuedenAprenda a Soldar Como Sostener LA PistolaTecnicas Para Soldar Angulo aAngulo B ILAS Descargas ElectricasCord6n de refuerzo Posici6n Vertical Mitodosespeciales Para Soldar Soldadura DE Puntos Figura 15. Junta a tope en V de tres pasadasInstrucciones Para Soldadura DE Puntos Mantenimiento GeneralILAS Descargas Electricas Pueden Mantenimiento DE InsumosMantenimiento DE LA Boquilla PrecaucionPrueba DE Cortocircuito EN LA Boquilla Reemplazo DEL Forro DE LA PistolaMantenimiento Preventivo Diagnstico DE ProblemasInstalacin DEL Alambresoldador Problema Causa POSlBLE SOLUCl6N POSlBLE12ov!sl Transformador115V40x60AL 6257 ILl Soldadora CON Alimentador DE Alambre Modelo DescripcibnGraduaciones Sugeridas Para LA Soldadora 0308EAR8
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