Assessments - 3, GPA: 4.7
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. The welder control panel contains information regarding proper input 3 Operating Instructions GTAW Arc Welding Torch voltage and amperage. Follow the specifications on the welder front panel. . The receptacle used for the welder must be properly grounded and the welder must be the only load on the power supply circuit. The Components of TIG Welding (not included with your WT6100 TIG torch) are: 1. A constant current power supply such as the Arcitech 110 inverter technology arc welder. 2. A bottle of 100% Argon Shielding gas 3. An Argon regulator with proper connections from the regulator to the TIG torch. 4. Filler metal 5. Proper safety equipment such as a welding helmet and gloves. Set Up: Torch connection to power supply - The WT6100 torch comes with a quick connect Dinse plug that is plugged in to the NEGATIVE (-) receptacle on the power supply. The Work clamp is plugged in to the POSITIVE (+) receptacle of the power supply. A beginning heat output amp setting is selected based on the thickness of the steel to be welded (See chart below). 100% Argon shielding gas is connected to the torch at a regulated rate of 15 30 cubic feet per hour (cfh.) If you have too little gas, you will see porosity of your weld. Too much flow is just a waste of gas. Filler metal is applied to the TIG weld by hand feeding as is done with oxyacetylene (flame power) welding. The filler metal must match the material you are welding. For welding mild steel, use an un-coated steel rod such as Welco W-1200, AWS A5.2-69, class RG60, or E70S-6 MIG wire. The diameter of the filler metal is based on the thickness of the material being welded (See chart). Tungsten Electrodes come in a variety of compositions and sizes. Since the Arcitech 110 welder with WT6100 torch is a DC TIG welder, you should use only 2% Thoriated tungsten electrodes. These electrodes have a red identification mark. The diameter of the electrode is determined by the thickness of the material being welded. (See chart). THE COLLET AND COLLET BODY SIZE MUST MATCH THE DIAMETER OF THE TUNGSTEN ELECTRODE. Before installing the Tungsten Electrode you must grind a point on the welding end of the electrode. A point of 15 - 30 degrees is desired. It is important to grind the point with grinding marks running lengthwise as opposed to running the direction of the diameter. Install the Tungsten Electrode in the torch by hand tightening the collet body first, and then the back cap. Install the electrode so that the pointed end sticks out past the nozzle about 3/16”. Figure 4 - Tungsten should stick out 3/16” Figure 5- Install Back Cap TIG Consumable Selection Chart Steel Thickness Tungsten Electrode Diameter Filler Wire Diameter DC Amp Inches Inches Millimeters Inches Millimeters Setting .020" - .040" .020" 0.5 1/16" 1.6 2 - 20 .040" - 1/16" .040" 1 1/16" 1.6 10 - 75 1/16" - 1/8" 1/16" 1.6 1/16" 1.6 60 - 150 1/8" - 3/16" 5/64" 2 3/32" 2.4 100 - 200 3/16" - 1/4" 3/32" 2.4 1/8" 3.2 170 - 250 4 Model WT6100 Pre-TIG Welding tips: TIG welding is much harder to master than other welding processes. Experience welding with an Oxy- Acetylene (flame power) torch will help greatly with learning TIG welding. CLEAN the area to be welded. Cleanliness is imperative. You can’t get the base metal too clean. There is no flux to float off impurities with the TIG process. Cut filler metal rods to shorter lengths for easier control. Usually TIG filler metal comes in 36” lengths. It is much easier to handle if it is 18” or 12”. Clean the filler metal with alcohol and a clean white cloth. Dirt and dust contaminate a weld. TIG welding gives off less light than other arc welding processes, but you must still use a #10 minimum shade welding lens to protect your eyes. Get yourself into a comfortable position to weld. Seated with your arms supported by a welding table or by the work-piece. TIG Electrode Identification Striking an arc: Turn on the welder and the gas valves on the gas bottle, regulator, and torch. Rest the torch nozzle on the base metal to be welded without the Tungsten electrode touching the base metal. Rotate the torch so that the Tungsten electrode lightly touches the base metal and immediately lift off or rotate off as the arc ignites. Keep the Tungsten 1/8” - 3/16” from the work piece while maintaining the arc. As the metal gets hot, it becomes a shiny orange molten puddle. Dip the filler metal rod in the puddle to add filler metal. Tips while TIG welding: Always let the filler metal rod be melted by the molten puddle. NOT by the torch. Never touch the hot Tungsten electrode to the molten puddle. The molten steel will be wicked up by the Tungsten, contaminating the electrode. When you contaminate the Tungsten with steel, stop welding and re-grind the point of the electrode, removing the steel contamination. When you burn a hole through the base metal, stop welding and let the weld cool before re-starting the arc. Before making an important TIG weld, pract...