CAD 215 - Mechanical Systems

1. Analyze basic thread forms.
   1. Discuss thread theorems.
   2. Identify parts of the thread form.
   3. Calculate thread tolerances/fits.
   4. Review SAE/ANSI thread standards.
   5. Discuss standard thread forms.
   6. Discuss non-standard thread forms.
   7. Identify U.S. Customary thread standards.
   8. Identify metric thread standards.
   9. Discuss CAD construction of threads.
   10. Create thread drawings.
   11. Dimension threads and drawing callouts.
   12. Calculate thread tolerances/fits.
2. Identify complex thread forms.
   1. Identify parts of the thread form.
   2. Identify ACME, square, and miscellaneous complex threads.
   3. Discuss CAD construction of complex threads.
   4. Create and dimension detailed thread drawings.
3. Discuss thread applications beyond fastening.
   1. Discuss using threads for power transmission.
   2. Discuss hybrid types of mechanisms. (Screw jacks, etc.)
4. Identify standard threaded fasteners.
   1. Discuss standard threaded fastener data.
   2. Examine screws and bolts.
   3. Examine bolt grades and head markings associated with the grades.
   4. Discuss drawing callouts for standard fasteners.
   5. Examine fastener drive design, such as hex, slotted, etc…
   6. Create standard threaded fasteners in CAD.
   7. Create a library of fasteners.
5. Examine pipe threads.
   1. Discuss taper threads and how they can be sealed.
   2. Discuss straight pipe threads.
   3. Discuss ISO and U.S. Customary standards.
   4. Examine drawing callouts for pipe threads.
6. Examine threaded nuts.
   1. Discuss hex and other standard nuts.
   2. Discuss castle and other locking nuts.
   3. Discuss nuts with a built in washer.
7. Discuss washers.
   1. Examine washer applications and usage.
   2. Discuss flat, lock, tooth, and conic washers.
8. Discuss rivets.
   1. Examine rivet applications.
   2. Discuss rivet data/specifications.
   3. Discuss ANSI standard drawings configuration for rivet heads.
9. Discuss locational/alignment hardware.
   1. Discuss purpose of locational/alignment hardware.
   2. Examine the tolerances of locational/alignment hardware.
   3. Examine keys, keys seats, and key ways.
   4. Discuss dowel pins.
   5. Discuss shear pins.
   6. Examine clevis pins.
   7. Examine roll pins.
   8. Discuss cotter pins.
10. Examine non-standard mechanical fasteners.
    1. Examine retaining rings, internal and external.
    2. Examine retaining ring groove specifications and tolerances.
    3. Examine ¼ turn fasteners.
    4. Examine pressed in fasteners.
    5. Examine latches.
    6. Discuss clamps.
    7. Examine threaded rod.
    8. Discuss masonry fasteners.
    9. Discuss plastic fasteners.
    10. Discuss welded fasteners.
    11. Examine security fasteners.
    12. Discuss specification data sheets.
    13. Create non-traditional fastener and specification.
11. Discuss mechanical springs.
    1. Discuss springs - compression, extension, and torsion.
    2. Discuss data required for a spring drawing.
    3. Create a spring drawing and included data.
12. Discuss mechanisms.
    1. Identify parts of a planar mechanism.
    2. Create kinematic diagrams.
    3. Examine mobility.
    4. Discuss Gruebler’s equation.
    5. Calculate degrees of freedom.
13. Discuss linkage mechanisms.
    1. Examine four bar linkages.
    2. Discuss Grashof’s criterion.
    3. Qualify and categorize linkages.
    4. Identify the limits of motion.
    5. Identify points of interest.
    6. Identify slider crank mechanisms.
14. Analyze mechanical timing devices.
    1. Examine cams - plate, face, and drum.
    2. Discuss cam followers.
    3. Create a cam displacement diagram and cam drawing.
    4. Examine timing belts.
15. Investigate gears.
    1. Discuss types of gears.
    2. Discuss gear definitions.
    3. Discuss gear formulas.
    4. Calculate gear data.
    5. Draw a tooth profile and gear.
    6. Discuss gear drive trains.
    7. Discuss gear backlash.
    8. Determine center to center distances.