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Design Basics

Design Basics. or how to put together simple things simply. Outline. Attaching things (permanently and temporarily) Simple structural supports and enclosures, sealing (o-rings) Designing things that have to move (bearings, tracks, jamming issues) Modular solutions (MK, macrobench, dexion).

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Design Basics

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  1. Design Basics or how to put together simple things simply

  2. Outline • Attaching things (permanently and temporarily) • Simple structural supports and enclosures, sealing (o-rings) • Designing things that have to move (bearings, tracks, jamming issues) • Modular solutions (MK, macrobench, dexion)

  3. Permanent Attachment • Welding (later) • Brazing (later) • Rivets • Glue • Epoxy • Superglue • Solvent-based adhesives

  4. Temporary Attachment • Wood screws • Sheet metal screws • Machine screws • Set screws • Thumb screws Go to www.mcmaster.com !!!

  5. Temporary Attachment:Fastening with Screws • Wood screws • Sheet metal screws • Machine screws • Set screws • Thumb screws Go to www.mcmaster.com !!!

  6. Screws & Bolts • Terminology

  7. Attachment with Screws & Bolts • Calculate forces according to textbooks like Mechanical Engineering Design by Shigley & Mischke to find the correct size until you have a good gut feeling Examples of attachment on blackboard

  8. Screws & Bolts • How to create threads: tap and die set

  9. Supports, Enclosures, Pressure Vessels • Supports • Take load • Look nice • Enclosures • Visually clear or not • Thermal isolation • Pressure isolation

  10. Supports, Enclosures, Pressure Vessels • Supports • Take load • Look nice • Enclosures • Visually clear or not • Thermal isolation • Pressure isolation Make them SIMPLE!

  11. Supports, Enclosures, Pressure Vessels • Supports • Take load • Look nice • Enclosures • Visually clear or not • Thermal isolation • Pressure isolation Parker Seals http://www.parker.com/sg/sgcatalogs.asp

  12. Things that MOVE pergatory.mit.edu/2.007

  13. pergatory.mit.edu/2.007

  14. pergatory.mit.edu/2.007

  15. pergatory.mit.edu/2.007

  16. pergatory.mit.edu/2.007

  17. pergatory.mit.edu/2.007

  18. Linear Motion pergatory.mit.edu/2.007

  19. Linear Motion pergatory.mit.edu/2.007

  20. Linear Motion • McMaster-Carr • Order online • CALL for help!

  21. Bearings & lubrication • Rotational & Linear Motion • NEVER put aluminum on aluminum! • USE a BUSHING or BEARING pergatory.mit.edu/2.007

  22. Commercial Solutions

  23. MK Automation • easy attachment • modular • not too cheap • GREAT for enclosures, structures www.MKprofiles.com

  24. Macrobench and Microbench • NOT cheap • GREAT alingment • GREAT for optics • Different sizes available www.linos.com

  25. Dexion • Easy to use • Not very structural • Not as “pretty” as other options www.dexion.com

  26. REFERENCES • BEST DESIGN TEXTBOOK EVER! • Mechanical Engineering Design by Joseph Shigley and Charles Mischke • Design Website • pergatory.mit.edu/2.007 • Parts/Info • www.mcmaster.com • www.parker.com/SG • www.MKprofiles.com • www.linos.com • www.dexion.com

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