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2.972 Understanding How Things Work

Instructor:  Martin Culpepper
617 - 258 - 8541
Room:          35-125A
Time:            9am -12.00 then 1.30 - 4pm
Credit:          P/D/F
Units:            6 Units
Grading:     Grading [75% = pass]

   -35% Final Report   -20% Class Participation/Field Trips   -25% Labs     -20% External Gear Pump/Motor Project

Session 1:    Jan. 4 - 15 M, T, W, R, F (FINIS!) Session 2:   Jan. 19-29 M, T, W, R, F
Understanding How Things Work is About:

    Learning how some mechanical, hydraulic, and electro-mechanical devices operate.  In lab, you will (in groups) disassemble several machines, then model the operation of each device. Devices which are of particular interest to students, or impractical to disassemble in lab will be examined during field trips and through final reports.  Some of the skills/knowledge you will acquire in 2.972 are:

Skill / Knowledge How Acquired
Understanding of how many devices operate right_pointing_arrow.gif (1042 bytes) Taking a multiplicity of machines apart and using/running them
Ability to learn/determine how things work right_pointing_arrow.gif (1042 bytes) Lectures and lab exercises on using functional requirements, geometry, structure, physics, and flow (material, information, energy, etc...) in machines/devices and using these to determine how machines work.
Ability to explain how things work to others right_pointing_arrow.gif (1042 bytes) Explaining operation of machines you take apart in your lab write ups and to other students
Ability to create, rotate, translate, and otherwise visualize 3D objects right_pointing_arrow.gif (1042 bytes) Sketching the machines/parts and solid modeling some of them
Understanding fo the limiting and dominant physics of many machines right_pointing_arrow.gif (1042 bytes) These will be covered in the workshops and you will use them in lab
Understanding of how geometry is linked to and affects performance right_pointing_arrow.gif (1042 bytes) Geometric modeling, mathematical modeling, and by making working model(s)
Knowledge of some machine elements and how they are used right_pointing_arrow.gif (1042 bytes) You will see a wide variety of machine parts/elements in lab and on field trips
Day Work Shop Lecture
Workshop Hands On


      Discuss Course
      Discuss prizes
      Functional Requirements
        & Design Parameters
      Understanding Geometry, Structure,
         Physics, and Flow
      Sketching Basics
      Conversion Spread Sheet

      Waterjet and "Take Apart" Lab (9.45 am)

Assignment:  To Read/Research:
      Lab write ups, final reports, sample report
      Solid Modeling Introduction (under design tools)
      Spread Sheets (under design tools)
      Final projects via web, patents, library

Workshop 1
Conversion Spreadsheet & Sketching Exercises

-Functional Requirements and Design Parameters

These are important, because:

1. Spread Sheets:
-We will be using spreadsheets to do the calculations in most of our labs.

2. Functional Requirements & Design Parameters:
- It is important to realize the whats (functional requirements,) hows (design parameters,) their relation to each other, and their relation to design/performance in general.

3. Sketching:
- You need to be able to sketch for others the geometry and structure of what you are trying to explain.

- You need to to be able to visualize things in your head, flip them, rotate them, etc.. to understand and explain how many things work.

- You will be sketching many parts from the machines you take apart.



     Basic Physics
     Limiting and Dominant Physics
     Understanding magnitudes (power, torque, force, size)

Assignment: Solid Modeling tutorial
     Learning the SolidWorks™ Interface
     Extrude, Fillet, Shell, Basic Assemblies, Basic Drawings/Blue Prints

Workshop 2
Sketching Exercise & Solid Modeling Tutorial

These are important, because:

1. Physics & Flow:
- You need to understand the physics of machines and trace the flow of power, energy, information, and material to understand how things work.

2. Solid Modeling
- You must make the transition from the 2D world to the 3D world.  Building a CAD model forces your mind to think/see in 3D.   This is very  important.  It is very hard to understand/explain how many devices/systems work unless you can visualize them.

By the end of the day you should have:

1. Chosen a final project and have sources
2. OK'd the subject of your final project with me.

Lab #1


     Basic Manufacturing Processes

Assignment: Solid Modeling tutorial
     Revolve, Sweep, Loft
     Making DXF files for the Waterjet

     Aero-E Department Wind Tunnels (3.00 PM)

Workshop 3
Solid Modeling Cont. & External Gear Pumps

By the end of the day you should have:

1. An external gear pump design spreadsheet
2. Outlined your final paper (Use Microsoft Word)

Lab #1 cont.


     Solid Modeling & Design Intent

     Work on Gear Pump Design and Solid Model

     MIT MEMS Lab (2.00 PM)
Workshop 4
Begin Solid Modeling of Gear Pump

By the end of the day you should have:

1. The dimensions you want for your pump
2. Handed in your 3 gear parameters
3. Talked to me about how you will solid model your pump (what is your design intent?)

Lab #2

I will be available in 35-125A on Saturday and Sunday from 11 am to 5pm.

You should finish designing your PUMPS  


Lecture: None!

     Finish Gear Pump CAD Model

     MIT Physical Plant (1.30 PM)
Workshop 5
Finish Design of Gear Pump

By the end of the day you should have:

1.  Handed in a rough draft (with rough sketches) for your final report (Use Microsoft Word)
2. Finished your GEAR PUMP CAD model

Lab #2 cont.


Lecture: Basic HTML and using Microsoft Word to make web pages

     Make gear pump prints
     Make 1st corrections to final report

Workshop 6
Make Gear Pump Prints, Correct Reports, and Convert Reports to HTML

HTML is important because you will:

1. Need to write your final report as web pages.  We will collate our reports and make the base pages of the MIT's How Things Work Web Site.

2. You will now be able to make your own web page and publish your resume and portfolio on-line.

By the end of the day you should have:

1. Saved report as HTML and made 1st set of corrections
2. Finished
drawings of your CAD model
3. Handed in DXF Files of your pump components

Lab #3


Lecture: None

     Make 2nd corrections to final report
     Start CAD models/sketches for your report

Workshop 7
Make Gear Pump Prints and 2nd Correction to Reports

By the end of the day you should have:

1.  Made 2nd set of corrections to final report
2.  Started your CAD/VRML models/sketches for your final report (if applicable)

Lab #3 cont.


Lecture: None

     Make final corrections to final report
     Finish CAD models/sketches for your report
     Go to lab and take apart stuff if you are finished!

     Car Wash (~3.15 PM depending upon interest & time)

Workshop 8
Make Final Corrections to Reports, Finish Report CAD/VRML Models, and Make Sure All is Well

By the end of the day you should have:

1.  Made final corrections to final report
2.  Finished your CAD/VRML model/sketches for your final report (if applicable)

Lab #4


     Review Class

     Assemble gear pumps/motors
     Get ready for pump/motor contest!!!
     Make finishing touches on reports
     Hand in reports
Workshop 9
Hand in Report, Build Pump, Have Contest

By the end of the day you should:

1.  Had fun at the contest
2.  Handed in your final projects by 4 p.m.!!
3.  There WON'T be exceptions!
4.  Gone home and Sleep, Party...

Lab #4 cont.
Pump/Motor Contest!


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