smaw
DESCRIPTION
SMAW. Shielded Metal Arc Welding. OFW/OFC. OXY FUEL WELDING OXY FUEL CUTTING. Purge. To blow or clean out the lines on the Oxy/Acetylene setup. Flux. Powdered coating around the electrode used in SMAW process. 1) Cleans metal/weld while welding - PowerPoint PPT PresentationTRANSCRIPT
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SMAWSMAW
Shielded Metal Arc WeldingShielded Metal Arc Welding
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OFW/OFCOFW/OFC
OXY FUEL WELDINGOXY FUEL WELDING
OXY FUEL CUTTINGOXY FUEL CUTTING
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PurgePurge
To blow or clean out the lines on the To blow or clean out the lines on the Oxy/Acetylene setupOxy/Acetylene setup
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FluxFlux
Powdered coating around the Powdered coating around the electrode used in SMAW process.electrode used in SMAW process.
1) Cleans metal/weld while welding1) Cleans metal/weld while welding 2) Cools Metal/weld/electrode while 2) Cools Metal/weld/electrode while
weldingwelding 3) Stabilizes the arc while welding3) Stabilizes the arc while welding 4) Keeps out atmospheric gases from 4) Keeps out atmospheric gases from
the the molten puddlemolten puddle
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ElectrodeElectrode
Flux covered conductive rod used as Flux covered conductive rod used as filler in the SMAW processfiller in the SMAW process
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SlagSlag
Protective coating over completed Protective coating over completed weld made up of burnt flux, weld made up of burnt flux, impurities that have rose to the top impurities that have rose to the top of weld which aid in the cooling of weld which aid in the cooling process.process.
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CraterCrater
Indentation in the weld (below base Indentation in the weld (below base metal) usually happens at the end of metal) usually happens at the end of the weldthe weld
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Arc LengthArc Length
Distance between the tip of the Distance between the tip of the electrode and the base metal. Also electrode and the base metal. Also known as Arc Gap.known as Arc Gap.
Long Arc = large GapLong Arc = large Gap Short Arc = Small GapShort Arc = Small Gap
Shorter the Gap = Cooler the ArcShorter the Gap = Cooler the Arc Longer the Gap = Hotter the ArcLonger the Gap = Hotter the Arc
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Rod AngleRod Angle
Angle the electrode is held from the Angle the electrode is held from the base metalbase metal
1)Base Angle (BA)1)Base Angle (BA)
2)Direction of Travel Angle (DOTA)2)Direction of Travel Angle (DOTA)
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PorosityPorosity
Gas Pocket in/on the weld that is a Gas Pocket in/on the weld that is a defect in the weld. defect in the weld.
Long arc will cause Long arc will cause Dirty base metalDirty base metal Broken flux from the rod.Broken flux from the rod.
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FusionFusion
Combining or joining of two materialsCombining or joining of two materials
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PenetrationPenetration
Depth of FusionDepth of Fusion
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DuctilityDuctility
Ability of metal to be bent or Ability of metal to be bent or stretched without breakingstretched without breaking
1) Rolled1) Rolled 2) Bent2) Bent 3) Stretched3) Stretched
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AlloyAlloy
What metal is made up of (Elements)What metal is made up of (Elements)
1) Periodic Table1) Periodic Table ZincZinc MagnesiumMagnesium IronIron
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Flashback/BackfireFlashback/Backfire
Hissing or Popping sound from tip of Hissing or Popping sound from tip of torch caused by gas and flame torch caused by gas and flame going back into the tip.going back into the tip.
1)1) Tip to closeTip to close
2)2) Dirty TipDirty Tip
3)3) Malfunction of equipmentMalfunction of equipment
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AmpsAmps
The measure of Electrical FlowThe measure of Electrical Flow
1) electrons traveling 1) electrons traveling 2) Water running out of a garden 2) Water running out of a garden
hose hose would be compared to Amps would be compared to Amps 3) Water Flow/Electrical Flow3) Water Flow/Electrical Flow
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VoltsVolts
Measure of Electrical PressureMeasure of Electrical Pressure
1) Force of electrons1) Force of electrons 2) Compared to your finger over a 2) Compared to your finger over a
running running garden hose to generate garden hose to generate more more pressure.pressure.
3) water pressure/Electrical pressure3) water pressure/Electrical pressure
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PuddlePuddle
Molten metal that follows the Molten metal that follows the electrode, this solidifies to create the electrode, this solidifies to create the weld.weld.
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Arc Flash/Flash BurnArc Flash/Flash Burn
Dangerous lights produced during Arc Dangerous lights produced during Arc Welding that damage your eyes/skin Welding that damage your eyes/skin if not protected with shaded/filtered if not protected with shaded/filtered lens or protective clothing.lens or protective clothing.
Dangerous lights: Ultraviolet/InfraredDangerous lights: Ultraviolet/Infrared Arc Flash: Burns unprotected eyesArc Flash: Burns unprotected eyes Flash Burn: Burns unprotected skinFlash Burn: Burns unprotected skin SMAW <125 amps shade 10SMAW <125 amps shade 10
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Flash/Arc BurnFlash/Arc BurnUltraviolent/Infrared LightUltraviolent/Infrared Light
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Butt JointButt Joint
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Corner JointCorner Joint
Outside Inside
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Edge JointEdge Joint
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T JointT Joint
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Lap JointLap Joint
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Electrode #’sElectrode #’s
Tensile Strength
60 = 60,000 psi
70 = 70,000 psi
80 = 80,000 psi
90 = 90,000 psi
Welding Position
1 = All Positions
2 = Flat/Horizontal
3 = Flat Only
Special Characteristics
0 = Deep/DC + / Fast Freeze
1 = Deep/AC/DC + / Fast Freeze
3 = Shallow /AC/DC+/DC-
8 = Medium / AC/DC+/Low Hydro
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E 60 1 1
Electrode
X 1000 lbs sq inch Tensile Strength
Position
Special Characteristics•Current Type
•Flux Characteristics
•Metal Type
•Penetration
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E 60 11E 60 11
E 60 1 1
Electrode
60,000 psi
All Position
Special Characteristics•Deep Penetration
•Cellulose Potassium flux
•Fast Freeze
•AC/DC+ (current)
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E 60 1 0E 60 1 0
E 60 1 0
60,000 psi
All Position
Electrode
Special Characteristics•Deep Penetration
•Cellulose sodium flux
•Fast Freeze
•DC+ (current)
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E 70 1 8 E 70 1 8
E 70 1 8
70,000 psi
All Position
Electrode
Special Characteristics•Medium Penetration
•Iron Powder Low Hydrogen flux
•AC/ DC+ (current)
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E 60 1 3E 60 1 3
E 60 1 3
60,000 psi
All Position
Electrode
Special Characteristics•Shallow Penetration
•Titania Potassium flux
•AC / DC+ / DC - (current)
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Electrode #’s Quiz SlideElectrode #’s Quiz Slide
Tensile Strength
60 = 60,000 psi
70 = 70,000 psi
80 = 80,000 psi
90 = 90,000 psi
Welding Position
1 = All Positions
2 = Flat/Horizontal
3 = Flat Only
Special Characteristics
0 = Deep/DC + / Fast Freeze
1 = Deep/AC/DC + / Fast Freeze
3 = Shallow /AC/DC+/DC-
8 = Medium / AC/DC+/Low Hydro
E Electrode
8080,000 psi tensile strength 2 Flat/Horizontal
Position 1 Fast Freeze
Deep Penetration
AC/DC +
E Electrode
60
60,000 psi tensile strength 3 Flat Position
Only8
Low Hydrogen Flux
Medium Penetration
AC/DC +
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B. Welding Procedures (Cont.)B. Welding Procedures (Cont.)
b. A tapping movement is where the b. A tapping movement is where the electrode is quickly tapped on the surface electrode is quickly tapped on the surface of the metal to prevent it from sticking to of the metal to prevent it from sticking to the base metal.the base metal.
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4 Things Required for a Good 4 Things Required for a Good WeldWeld
Amp Setting :Amp Setting : Heat and (proper current Heat and (proper current type)type)
Travel SpeedTravel Speed
Rod Angle: Rod Angle: (Base Angle/Direction of Travel (Base Angle/Direction of Travel Angle)Angle)
Arc Length: Gap Should Equal Diameter of Arc Length: Gap Should Equal Diameter of ElectrodeElectrode
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B. Welding Procedures (Cont.)B. Welding Procedures (Cont.)
8. There are two methods used in starting 8. There are two methods used in starting the arc.the arc. A striking movement is similar to striking a A striking movement is similar to striking a
match.match.
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Welding PositionsWelding Positions
FlatFlat
HorizontalHorizontal
VerticalVertical: V Up/V Down : V Up/V Down (v up Gives deeper (v up Gives deeper penetration)penetration)
OverheadOverhead
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Flame Types Flame Types
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OxygenOxygen
Odorless GasOdorless Gas
Colorless GasColorless Gas
Line Colors GreenLine Colors Green
Right Handed Threads on FittingsRight Handed Threads on Fittings
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Types of Combustible GasesTypes of Combustible Gases
3 types commonly Used for Fuel in 3 types commonly Used for Fuel in Oxy/Fuel Welding and CuttingOxy/Fuel Welding and Cutting
AcetyleneAcetylene PropanePropane Mapp Gas Mapp Gas ((mmethylethylaacetylene-cetylene-ppropadiene ropadiene ppropane)ropane)
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acetyleneacetylene
Colorless GasColorless Gas Garlic OdorGarlic Odor Unstable after 15psi Line PressureUnstable after 15psi Line Pressure Absorbed into Acetone (cork) to Absorbed into Acetone (cork) to
allow higher pressures in Tankallow higher pressures in Tank Red Colored Hoses w/ Left Handed Red Colored Hoses w/ Left Handed
ThreadsThreads
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Duty CycleDuty Cycle
The amount of time a welding The amount of time a welding machine can be operated machine can be operated continuouslycontinuously
70% Duty Cycle= 70% of an hour70% Duty Cycle= 70% of an hour 70% Duty Cycle = 7 minutes every 70% Duty Cycle = 7 minutes every
10 min10 min
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PolarityPolarity
DC+DC+ DC-DC- DCEPDCEP DCENDCEN Reverse PolarityReverse Polarity Straight Straight
PolarityPolarity