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SHIEDED METAL ARC WELDING (SMAW)
What is Shielded Metal Arc (SMAW)?
PREPARED BY: FERNAN C. DARAY JR
COURSE: BTVTED II FLOYD
-Smaw is often reffered to a stick or manual welding.
-Metal rod cover with the flux that provides the shielding to protect the weld.
-Used for fabrication of ships pressure vesel, tanks, auto mobile and appliances.
-Most widely used form of welding in the world.
SMAW SAFETY
EYE PROTECTION
-Safety Glases or Welding helmet.
PROPER WORK CLOTHING
-Jackets, Coverall, Welding Gloves.
ELECTRICAL EQUIPMENT HAZARD
-Frayed connections, Water, Protecting you from becoming part of the circuit.
WELDING PERSONAL PROTECTIVE EQUIPMENT OR PPE
WELDING GLOVES WELDING JACKET
SAFETY SHOES WELDING MASK
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SMAW EQUIPMENT
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POWER SUPPLY
-Must maintain constant current with only a light change in voltage.
-Variying voltage and current will result in an uneven are that create spatter and un even welds.
-Multuple types of powe supplies (Generators, Transformers, Rectifiers, and Inverter).
WELDING MACHINES
PORTABLE WELDING MACHINE HEAVY DUTY WELDING MACHINE
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SMAW EQUIPMENTS
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WELDING LEADS
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WELDING LEADS: Conduct current from the work piece.
-Lead the electrode holder attached is called electrode lead.
-Commonly but incorrectly referred to as ground clamp.
ELECTRODE HOLDER
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-Handle like a tool that holds the electrode during welding.
-Recieve amperage and directs it trhough the electrode to from an arc.
-should be well insulted and free from defect.
WORK PIECE CONNECTION
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-Must be connected to work piece or bench to complete electricel circuit.
-Connection are made to be removable for nasy mobility.
WELDING HELMET
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-Used to filter the intense UV light produced from the arc welding process.
-Need to be at least as #10 shade.
-Auto shade helmet can be set to particular shade number and don't need change the filter lens.
ELECTRODES
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-Consist of internal metal core and anouter coating called flux.
-Metal core melts into morten base metal.
-Flux into shield as it burn away.
-Several types and sizes of electrodes.
STEEL BRUSH
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Steel wire brushes are a common and essential tool in any metal fabrication shop. These brushes can be used for a variety of applications, including weld cleaning, deburring, rust and oxide removal, surface preparation, and surface finishing