Faculty Use and Sources For Standards

1. Faculty Use and Sources For Standards Examples & Standards

2. Uses in Capstones • Projects (Conceptual, virtual or real) using realistic design constraints. CAD systems are theoretical unless ‘real’ values are used • Research into standards (examples of what particular standards control some part aspect, details in standards beyond handbooks, specific basis for municipal / state / national codes, etc.)

3. US Domestic StandardsMost by gift or discount from SDO, broker • Mechanical Engineering • Materials, fasteners, metrology, fits dimensioning & tolerances, tools, 3D CAD • Nuclear Engineering • Materials, design, plant construction, operational parameter • Electrical/Computer Engineering • Materials, components, circuit protocols,networking, communications

4. International StandardsMost free from ANSI or discount from SDO, broker • IEC (International Electrotechnical Commission) • Devices, techniques for electrical and controls systems (many co-branded) • ISO (International Organization for Standardization) • Almost everything from banking to mining to fasteners to medical devices • ITU (International Telecommunications Union) • Telephony, television, networks (think 4G)

5. ABET — Criterion 5 - General Curriculum (2011-2012) Students must be prepared for engineering practice through a curriculum culminating in a major design experience based on the knowledge and skills acquired in earlier course work and incorporating appropriate engineering standards and multiple realistic constraints.

6. Case Study: Simple Mechanism toIllustrate the Ubiquitous Nature of Standards Even a simple device can require complex real-world decision-making based on the use of standards

7. Project Presented as a 3-Part Capstone via ECOs • Key Concepts: ECO, unit conversion using hard conversion, a practice common in metric countries. Add metric parts as teams both discrete and systems thinking required.

8. Task: In three phases, design a Customary Inch arbor press in SI preferred numbers according to ECOs How many standards? Hint: Over 22! 6 fasteners, 4 threaded holes, 2 clearance holes, 3 fits, 1 finish,2 plating, 2 counterbores, knurling,preferred numbers, SI sheet metal,ring groove, gears, others.(ASTM, ASME, ISO)

9. Task: Redesign a Customary Inch arbor press in SI preferred numbers ECOs: Convert inch dimensions and parts toSI preferred numbers. Retain approximate trade size, calculate mass properties, add GD&T. ECO1 & 3 are individual phases, ECO2 is accomplished as teams.

10. Unit Conversion Drill sizes to preferred numbers

11. Issues with fasteners • CAD models vs. real sizes • Thread length vs. tap drill hole depth • Costs vs. functionality • Clearance holes • Other clearances

12. Issues with virtually all headed fasteners Ref. ASME B18.3.3-1986, Hex Socket Head Shoulder Screws

13. Task: Redesign a Customary Inch arbor press in SI preferred numbers ECO 2: As a team resolve issues when using assembly parts from each team member. Substitute standard parts for certain non-standard parts, substitute fasteners. build mating features using standard metric fits. Retain approximate trade size, add additional intelligent properties.