Assessments - 5, GPA: 4.6
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Facilidade de uso
For a wider weld, draw the wire back and forth across the joint in a curve, this is called a weave bead. Note: If too much current is drawn from the Flux Wire Welder, the Thermal Overload protector will activate, the amber indicator will light, and the Arc Welder will turn off until it cools down. If this happens, turn the Power Switch to the OFF position and wait about 3 ~ 5 minutes. 9. After a few seconds, stop, switch off the welder, and check the progress. Compare your weld’s appearance with the diagrams and descriptions in the Weld Diagnosis section starting on page 19. After making any necessary adjustments, continue the weld while carefully following the duty cycle guidelines as explained on page 15. Weld Settings Chart NOTE: The numbers within the spaces are the approximate wire feed settings recommended* for this wire size and material thickness. Material Thickness (Steel) 16 Gauge 14 Gauge 12 Gauge 1/ 8” Wire Size (Flux Core, Mild Steel) .030” Minimum Current 1 Minimum Current 4 Minimum Current 7 Maximum Current 6 *This chart is only intended to show general guidelines for different wire sizes and for different thicknesses of material. The settings should only be used at the beginning of a weld and must be adjusted after stopping and carefully inspecting the weld. Proper welding takes good technique and practice. Weld Diagnosis Weld Penetration Excess or burn-through Weld droops on top and underneath, or falls through entirely, making a hole. Proper Weld is visible underneath and bulges slightly on top. Inadequate Weld does not contact the joint fully, just on the surface. Cross Sections Possible Causes and Solutions 1. Excessive material at weld: Reduce wire feed speed. 2. Overheating: Increase welding speed and ensure that welding speed is kept steady. Possible Causes and Solutions 1. Workpieces too thick/close: Joint design must allow weld to reach bottom of groove and allow proper welding procedures. 2. Incorrect welding technique: Maintain 1/2” or less stickout. Keep arc on leading edge of weld puddle. Hold gun at proper angles as stated under Holding The Torch on page 17. 3. Insufficient weld material: Increase wire feed speed. 4. Insufficient weld heat: Reduce Welding Speed. Weld Not Adhering Properly Gaps present between weld and previous bead or between weld and workpiece. See areas below. Cross Section Possible Causes and Solutions 1. Dirty workpiece: Make certain that workpiece is clean and free from oil, coatings, and other residues. 2. Insufficient weld material: Increase wire feed speed. 3. Incorrect welding technique: Place stringer bead at correct place in joint. Adjust workpiece position or weld angle to permit proper welding to bottom of piece. Pause briefly at sides when using a weave bead. Keep arc on leading edge of weld puddle. Hold gun at proper angles as stated under Holding The Torch on page 17. Bend at joint Cross Section Possible Causes and Solutions 1. Improper clamping: Make sure that pieces are clamped securely in place. Make tack welds to help hold pieces. 2. Excessive heat: Weld a small portion and allow to cool before proceeding. Reduce wire feed speed. Increase weld speed. 10. When the weld is complete, lift the electrode wire clearly away from any grounded object, set the Face Shield down, turn toward the Flux Wire Welder, and turn the Power Switch to the OFF position. 11. Unplug the Power Cord from the electrical outlet. Be sure to set the torch down on a nonflammable, nonconductive surface. 12. The Wire Brush/Hammer (39) can now be used to clean up the weld. CAUTION: The weld may still be quite hot and sparks/chips may fly when cleaning. Be certain to continue to wear ANSI approved safety goggles and protective wear when cleaning a weld. The Hammer can be used to knock off any excess spatter and to help knock down any ridges. Be careful not to damage the weld or material when striking it. The Wire Brush can then be used to help remove oxidation and some fine spatter. Crooked/wavy bead Porosity Small cavities or holes in the bead. Top View Top View Possible Causes and Solutions 1. Stickout too long: Reduce stickout. 2. Inaccurate welding: Use two hands or rest hand on steady surface. Possible Causes and Solutions 1. Stickout too long: Reduce stickout. 2. Dirty workpiece or welding wire: Make certain that workpiece and wire are both clean and free from oil, coatings, and other residues. Excessive Spatter Spatter that is grainy and large. Fine spatter is normal. STRIKE TEST A test weld on a piece of scrap can be tested by using the following procedure. WEAR ANSI GOGGLES DURING THIS PROCEDURE. 1. After two scraps have been welded together and the weld has cooled, clamp one scrap* in a sturdy vise. 2. Stay clear from underneath while you strike the opposite scrap with a heavy hammer, preferably a dead-blow hammer. 3. A good weld will deform but not break. A poor weld will be brittle and snap at the weld. *This test will damage the weld it is performed on. This test ...