1 / 13

Faculty Use and Sources For Standards

Faculty Use and Sources For Standards. Examples & Standards. Uses in Capstones. Projects (Conceptual, virtual or real) using realistic design constraints. CAD systems are theoretical unless ‘real’ values are used

olina
Télécharger la présentation

Faculty Use and Sources For Standards

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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.

More Related