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Codes & Standards

Codes & Standards. Codes & Standards. Learning Activities View Slides; Read Notes, Listen to lecture Do on-line workbook. Lesson Objectives When you finish this lesson you will understand: Several of the codes and standards in common use. Keywords Codes, Standards.

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Codes & Standards

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  1. Codes & Standards

  2. Codes & Standards • Learning Activities • View Slides; • Read Notes, • Listen to lecture • Do on-line workbook • Lesson Objectives • When you finish this lesson you will understand: • Several of the codes and standards in common use Keywords Codes, Standards

  3. Industrial Specifications • General Motor/Fisher Body • Specification (MDS-247) • Ford Motor Company • Ford Specification BA13-1 • Ford Specification BA13-4 • Chrysler Corporation • Specification LP.461K-170

  4. General Motor/Fisher Body Specification • In this specification (MDS-247), all sheets less than 0.041-inch thick use the following parameter: • Electrode force: 500 lbs • Tip contact size: 0.25 inch • Nominal nugget diameter: 0.20 inch • Minimum nugget diameter: 0.16 inch • Criteria for rejection of a material include: • Hold time sensitivity (shear-type weld fracture when peel tested) • Brittle welds (during peel tests) • Laminated base metal (observed during peel test) • Narrow lobe (minimum 2000 amps at nominal weld time)

  5. Ford Specification BA13-1 Electrode Configuration Initial Button Diameter (inch) Minimum Button Diameter (inch) 0.31” x 30 0.31 (0.79 cm) 0.28 (0.71 cm) 0.25” x 45 0.25 (0.63 cm) 0.22 (0.56 cm) 0.19” x 45 0.19 (0.48 cm) 0.16 (0.41 cm)

  6. Ford Specification BA13-4 Minimum Current Range (Ampere) Minimum Button Sizes (inch) Actual Thickness (inch) 0.020 0.12 1000 0.024 0.12 1000 0.030 0.15 1500 0.036 0.17 1500 0.043 0.20 1500 0.053 0.21 1500 0.064 0.22 2000 0.077 0.24 2000 0.093 0.26 2000 0.113 0.29 2000 0.137 0.30 2000

  7. Chrysler Corporation Specification LP.461K-170 Heat-Affected Zone Weld Nugget Micro Hardness Traverse Cross Section Through Center of Spot Weld

  8. Codes and Equations Used for Electrode Face Selection Ayers & Fisher D = 1.5t + 0.1 (Leng) D = 2t + 0.1 (AWS) Ford BA 13-4

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