2 - Design Basics

Design Basicsor how to put together simple things simply

OutlineAttaching 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)

Permanent AttachmentWelding (later)Brazing (later)RivetsGlueEpoxySuperglueSolvent-based adhesives

Temporary AttachmentWood screwsSheet metal screwsMachine screwsSet screwsThumb screws

Go to www.mcmaster.com !!!

Temporary Attachment:Fastening with ScrewsWood screwsSheet metal screwsMachine screwsSet screwsThumb screws

Go to www.mcmaster.com !!!

Screws & BoltsTerminology

Attachment with Screws & BoltsCalculate 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

Screws & BoltsHow to create threads: tap and die set

Supports, Enclosures, Pressure VesselsSupports Take loadLook niceEnclosuresVisually clear or notThermal isolationPressure isolation

Supports, Enclosures, Pressure VesselsSupports Take loadLook niceEnclosuresVisually clear or notThermal isolationPressure isolation

Make them SIMPLE!

Supports, Enclosures, Pressure VesselsSupports Take loadLook niceEnclosuresVisually clear or notThermal isolationPressure isolation

http://www.parker.com/sg/sgcatalogs.aspParker Seals

Things that MOVE

pergatory.mit.edu/2.007

pergatory.mit.edu/2.007

pergatory.mit.edu/2.007

pergatory.mit.edu/2.007

pergatory.mit.edu/2.007

pergatory.mit.edu/2.007

Linear Motion

pergatory.mit.edu/2.007

Linear Motion

pergatory.mit.edu/2.007

Linear MotionMcMaster-CarrOrder onlineCALL for help!

Bearings & lubricationRotational & Linear MotionNEVER put aluminum on aluminum!USE a BUSHING or BEARING

pergatory.mit.edu/2.007

Commercial Solutions

MK Automation

www.MKprofiles.com easy attachment modular not too cheap GREAT for enclosures, structures

Macrobench and MicrobenchNOT cheapGREAT alingmentGREAT for opticsDifferent sizes available

www.linos.com

DexionEasy to useNot very structuralNot as pretty as other options

www.dexion.com

REFERENCESBEST DESIGN TEXTBOOK EVER!Mechanical Engineering Design by Joseph Shigley and Charles MischkeDesign Websitepergatory.mit.edu/2.007Parts/Infowww.mcmaster.comwww.parker.com/SGwww.MKprofiles.comwww.linos.comwww.dexion.com