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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 Presented by Robert Pelton & Tyson Baker MeEn 372 December 10, 2001
Applications Equipment/Processes Specifications Joint types Weld Joints Stress Concentrations Stress Calculations Outline
MIG (Metal Inert Gas) TIG (Tungsten Inert Gas) SAW (Submerged Arc Welding) SMAW (Shielded Metal Arc Welding) Types
Fundamentals • Electrode • Filler material • Solid • Cored • Shielding gas • Argon • Nitrogen • Helium
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
Considerations • Accessibility • Distortion • Heat • Spatter • Surface finish • Automation
Causes • Cracks • Cavities (Porosity) • Rough Dirty Bead • Incomplete fusion Good Weld Surface Porosity
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 • 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