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Welding Presented by Robert Pelton & Tyson Baker MeEn 372 December 10, 2001 Applications Equipment/Processes Specifications Joint types Weld Joints Stress Concentrations Stress Calculations Outline Applications MIG (Metal Inert Gas) TIG (Tungsten Inert Gas)

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Welding l.jpg
Welding

Presented by Robert Pelton & Tyson Baker

MeEn 372

December 10, 2001


Outline l.jpg

Applications

Equipment/Processes

Specifications

Joint types

Weld Joints

Stress Concentrations

Stress Calculations

Outline



Types l.jpg

MIG (Metal Inert Gas)

TIG (Tungsten Inert Gas)

SAW (Submerged Arc Welding)

SMAW (Shielded Metal Arc Welding)

Types



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Fundamentals

  • Electrode

  • Filler material

    • Solid

    • Cored

  • Shielding gas

    • Argon

    • Nitrogen

    • Helium


Specifications l.jpg
Specifications

  • MIG

    • Capacity: 0.020 to 0.250 in

    • consumable electrode

    • Weld materials: Carbon steels, low alloy steels, stainless steels, most aluminum alloys, zinc based copper alloys

  • TIG

    • Capacity: 0.005 to 0.250 in

    • Non-consumable tungsten electrode


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Considerations

  • Accessibility

  • Distortion

  • Heat

  • Spatter

  • Surface finish

  • Automation



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Causes

  • Cracks

  • Cavities (Porosity)

  • Rough Dirty Bead

  • Incomplete fusion

Good Weld

Surface Porosity






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Web Sites

  • http://www.aws.org/ American Welding Society

  • http://www.ewi.org/ Welding and Joining Information Network

  • http://www.adtdl.army.mil/cgi-bin/atdl.dll/tc/9-237/toc.htm Welding Theory and Application, Department of the Army, Washington, DC, 7 May 1993

  • http://www.lincolnwelding.com Lincon Electric (welding supply co.)

  • http://www.weldingengineer.com/ Welding Procedures and Welding Techniques


References l.jpg
References

  • Todd, Robert H., et al., Manufacturing Processes Reference Guide, Industrial Press Inc. New York, 1994.

  • http://www.efunda.com/processes/metal_processing/welding_inertgas.cfm



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