Maricopa Community Colleges  ABA153   20052-20086 
Official Course Description: MCCCD Approval: 07/22/08
ABA153 20052-20086 LEC 1 Credit(s) 1 Period(s)
Sheet Metal Layout and Processes
Three methods for laying out sheet metal patterns. Selection and use of layout and marking tools, hand snips and cutting and forming tools and equipment. Construction of seams and edges. Riveting and soldering sheet metal products.
Prerequisites: (Registered apprentice status and ABA152) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA153   20052-20086 Sheet Metal Layout and Processes
1. List and define trade terms relating to sheet metal layout. (I)
2. Identify and explain the three development methods for laying out sheet metal patterns. (II)
3. Demonstrate the correct selection and use of layout and marking tools. (III)
4. Demonstrate skill in the selection and use of hand snips for cutting out sheet metal parts and patterns. (IV)
5. Demonstrate skill and competence in the selection and use of cutting and forming tools and equipment. (V)
6. Demonstrate skill and competence in the construction of seams and edges. (VI)
7. Demonstrate skill and competence in riveting and soldering sheet metal products. (VII)
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MCCCD Official Course Outline:
 
ABA153   20052-20086 Sheet Metal Layout and Processes
    I. Trade Terms
        A. Angles
        B. Center lines
        C. Cheek
        D. Development
        E. Dimension lines
        F. Elevation
        G. Extension lines
        H. Fitting
        I. Gore
        J. Heel
        K. Layout
        L. Miter line
        M. Oblique lines
        N. Parallel lines
        O. Pattern
        P. Other
      II. Development Methods for Sheet Metal Layout
          A. General rules
            1. Check metal
            2. Square up left edge
            3. Start in lower left-hand corner
            4. Measure from square lines
            5. Use two points
            6. Complete all lines in one direction
            7. Draw horizontal and vertical first
            8. Prick mark all brake and forming lines
            9. Study basic shapes
            10. Check and confirm dimensions
          B. Layout instruments
            1. Straightedge
            2. Flexible steel rule
            3. Circumference rule
            4. Combination square
            5. Scratch awl
            6. Scriber
            7. Grease pencils
            8. Prick punch
            9. Center punch
            10. Trammel
            11. Dividers
          C. Parallel line development
          D. Radial line development
          E. Triangulation
            1. Planes
            2. True length
        III. Use of Layout and Marking Tools
            A. Steel rule
            B. Scratch awl
            C. Prick punch
            D. Dividers
            E. Trammels
          IV. Use of Hand Snips
              A. Types
                1. Straight cutting
                2. Bulldog
                3. Aviation
              B. Cuts
                1. Straight
                2. Outside curved
                3. Internal
                4. Notching
                5. Double cutting
            V. Cutting and Forming Tools and Equipment
                A. Hacksaws
                B. Squaring shears
                  1. Side gage cutting
                  2. Marked sheet cutting
                C. Notching (Coper)
                  1. Square
                  2. Straight
                  3. Slant
                  4. Vee
                D. Hole cutting
                  1. Punching
                  2. Drilling
                E. Notchers, seamers and crimpers
                F. Stakes, plates and dollies
                G. Forming machines
                  1. Slip-roll
                  2. Easy edger
                  3. Crimpers and benders
              VI. Constructing Seams and Edges
                  A. Bar folder
                  B. Brakes
                    1. Cornice
                    2. Box and pan
                  C. Edges
                    1. Hem
                    2. Double hem
                    3. Wire
                  D. Seams
                    1. Grooved lock
                    2. Snap lock
                    3. Pittsburgh
                  E. Connectors
                    1. Drive
                    2. Slip
                    3. Standing seam
                    4. Government lock
                    5. Standing s
                    6. Standing slip drive
                    7. "Ductmate"
                VII. Riveting and Soldering
                    A. Types of riviting
                      1. Hand
                      2. Semi-hand
                      3. Machine
                    B. Rivets
                      1. Tinners
                      2. Flathead
                      3. Countersunk
                      4. Roundhead
                      5. Pop or blind
                    C. Soldering
                      1. Soft
                      2. Hard
                      3. Tools
                      4. Flux
                      5. Solders
                      6. Torch soldering
                      7. Coppers and irons
                      8. Dip soldering
                      9. Soldering joint design
                      10. Surface preparation
                      11. Etching
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