1 Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc. Shielded Metal Arc Welding Shielded Metal Arc Welding Part II Part II A. A. General Information General Information B. B. Polarity Polarity C. C. Set Up Set Up D. D. Striking an Arc Striking an Arc
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1 Copyright 2004 Lincoln Global Inc. Shielded Metal Arc Welding Part II A.General Information B.Polarity C.Set Up D.Striking an Arc.
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Shielded Metal Arc WeldingShielded Metal Arc Welding
Part IIPart IIA.A. General Information General Information
B.B. PolarityPolarity
C.C. Set UpSet Up
D.D. Striking an ArcStriking an Arc
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Shielded Metal Arc WeldingShielded Metal Arc Welding
An arc welding process with an arc between a coveredAn arc welding process with an arc between a covered
electrode and the weld pool. The process is used withelectrode and the weld pool. The process is used with
shielding from the decomposition of the electrodeshielding from the decomposition of the electrode
covering, covering,
without the without the
application of application of
pressure pressure
and with filler and with filler
metal from metal from
the electrode. the electrode.
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Principles of the SMAW ProcessPrinciples of the SMAW Process
• Electric Arc Between Electrode & Work, Melts the Electric Arc Between Electrode & Work, Melts the Electrode & Fuses the JointElectrode & Fuses the Joint
• Weld Metal & Slag FormWeld Metal & Slag Form• Slag is Slag is
Lighter than the Lighter than the Molten Metal & Molten Metal & Rises to the Rises to the Top Top
• AC or DC AC or DC PolarityPolarity
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
DCEN (Striaght) PolarityDCEN (Striaght) Polarity
• DC -DC -
• Heat Concentrated at Heat Concentrated at ElectrodeElectrode
Magnum 300 Amp Electrode HolderMagnum 300 Amp Electrode Holder
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
GC 300GC 300
Tighten Lug To Tighten Lug To Ground ClampGround Clamp
Secure Lug to CableSecure Lug to Cable
SMAW SMAW - Lincoln Equipment Setup- Lincoln Equipment Setup
Magnum 300 Amp Work ClampMagnum 300 Amp Work Clamp
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Lincoln Equipment SetupLincoln Equipment Setup
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Shielded Metal Arc WeldingShielded Metal Arc Welding
• Known as Stick or Manual WeldingKnown as Stick or Manual Welding• Uses CC Power SourceUses CC Power Source• Versatile ProcessVersatile Process• All PolaritiesAll Polarities• Match Electrode Match Electrode
with Power with Power Source, Source, Base Metal, Base Metal, and Joint Designand Joint Design
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
The SMAW Process BasicsThe SMAW Process Basics
Arc
Original Surface Of Base Metal
Reinforcement-Build-up of Weld Metal
Slag
Molten Weld Metal
Protective Gas from Electrode Coating
Electrode Wire(Filler Metal)
Electrode Coating (Flux)
Metal Droplets
Penetration
Arc
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Copyright Copyright 2004 Lincoln Global Inc. 2004 Lincoln Global Inc.
Approximate Electrode Amperage Settings
Fast Freeze Fill Freeze Fast Fill Low HydrogenE6010 - E6011 E6013 - E7014 E7024 - E7028 E7018
Diameter of Current Setting Current Setting Current Setting Current SettingElectrode