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Welcome to

Computer-Aided Drawing and

Fabrication

Fall 2011

Nixie tube

Peter vanBlerkom

Individual project F09


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CAD/Fab Course Introduction 2

Why might you be here?

• This course is required!

• CAD modeling is fun

• Engineering graphics is a very useful skill

• People will pay you $ to do it!(Starting this summer!)

Custom chocolate model

for Frasca restaurant by

Naomi Saliman

Spring 2004


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How Does This Course Fit into the ME

Curriculum?

1. Ability to apply knowledge of mathematics, science,and engineering

2. Ability to identify, formulate, and solve engineering problems

3. Ability to use computers to solve engineering problems

4. Ability to use modern instrumentation5. Ability to design and conduct experiments including theuse of probability and statistics.

6. Ability to analyze and interpret data

7. Ability to design thermal systems, components, or processes to meet desired needs

8. Ability to design mechanical systems, components, or processes to meet desired needs


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ME Program Outcomes, Part 2

9. Knowledge of the processes used to manufacture products

10. Knowledge of contemporary issues in mechanicalengineering

11. Ability to make effective oral presentations

12. Ability to write effectively

13. Ability to function effectively on multi-disciplinaryteams

14. Understanding of professional and ethicalresponsibility

15. Understanding of the impact of engineering in a globaland societal context

16. Ability to engage in life-long learning


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Why Am I Here?

• I love engineering design!

• I’ve been doing it for 15+ years

• CAD modeling is fun, creative

• I want to share my knowledge

• I want you to develop some usefulengineering skills


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What are my qualifications?

• ME Grad from CU

• Owner of 3 Dawn Consulting since 2003 –a product design company

• Worked since 1993 as an engineer

• Have used SolidWorks since 1997

• Certified trainer in SolidWorks

• Have worked on a wide variety of products



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Textbooks

• Engineering Graphics – Selected Topics, Three chapters

from Bertoline & Wiebe, Fundamentals of Graphics

Communication, 6th Ed., McGraw-Hill, 2010. – Available online (see web site for instructions).

• Howard, W.E. & Musto, J.C., Solid Modeling usingSolidWorks 2011, McGraw-Hill, 2011.

• SolidWorks software

One-year unlimited version available

See web site for details


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Labs• Confucius said (really!):

I hear – I forget I see – I remember I do – I understand

• Labs are your opportunity to learn by doing

• Lab assignments will be posted on thecourse web site:

•

https://sites.google.com/site/mcen1025/home Lab assignments are due by the beginning of

the lab one week later for full credit


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Quizzes

• Five quizzes to test knowledge of

engineering graphics concepts, especially

GD&T

• Administered in labs via CULearn• Count 15% of your grade


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Lectures

• Lecture slides posted on course web site:https://sites.google.com/site/mcen1025/home

• Print out and bring to class• Provide big-picture concepts

– Design process, manufacturing processes, geometricdimensioning and tolerancing (GD&T), design formanufacturability, etc.

• Quiz hints

• SolidWorks examples and tips

• In-class workshop exercises (10% of grade – 10 max)


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Interactive InstructionLecture: “An ancient process whereby

information passes from the notes of the professor to the notes of the student —

without passing through the mind of either”

Interactive lecture:

Instant feedback from

students via remoteRF “clickers”


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GradingLecture

Workshops

10%

Individual

Project

15%

Team Project

15%

Labs

45%

Quizzes

15%


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Two Projects

1. Create CAD model of a simple assembly (15%)(Individual)

2. Design and build a small vehicle (15%)(Teams)

– Stereolithography body

– Purchased RC car chassis – Documentation

• Part drawings

• Assembly drawing

Sponsored by:


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Sample Individual Projects

Climbing Cam

Chris Carter

Lightning SYXBrandon Wheeler

CVT TransmissionEric Eason

Electric Guitar

Steve Szabados


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Sample Individual Projects

Spinning Reel - Nick Marsiglia


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Sample Group Projects


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Academic Honesty

It is expected that each student will dohis/her own work

Acceptable: Collaboration for the purposeof learning the concepts, SolidWorks, etc.

Unacceptable: Copying files

ACADEMIC DISHONESTY WILL BE DEALT WITH HARSHLY

It is easy to check whether SolidWorks files have been shared.


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The Design Process


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Graphics = Language

• Graphics is the language of design

• It allows clear communication ofdesign intent

• It fueled the industrial revolution

CONCEPT

DESIGN


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Two Types of Graphics

The old-fashioned way – Sketching by hand

– All you need is a pencil and paper

• Chalk and blackboard• Marker and white board

Computer-aided design (CAD)

– AutoCAD – ProEngineer

– SolidWorks

– and many others…

CONCEPT

DESIGN


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and Sketching Is One Of The First StepsCONCEPT

ed

Climbing Ability with 30 lb payload

20+ MPH with different gearing /motors

portable- under 80 lbs

access to battery compartment to swap batteries

to fit through a typical doorway

to work in sandy/dusty conditions

er resistant


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Hand Sketching

Why?

• Communicate a design idea

• As part of the creative design process

CONCEPT


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Multi-View Hand SketchCONCEPT


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Typical CAD Design Processreate CAD Parts

Combine Parts in

Assembly

DESIGN

reate Drawings of

Parts

Create Drawings of

Assemblies


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Typical CAD Output Process

reate Renderings

for Marketing

reate Parts List for

Purchasing

FABRICATE

Create Assembly

Instructions for

Manufacturing


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SolidWorks Characteristics

eature-basedonstraint-based

arametric

istory-based

ssociative

DESIGN


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SolidWorks Files

Part

.sldprt

Assembly

.sldasm

Drawing

.slddrw

.eprt

.easm

.edrw

DESIGN


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Homework

Lab 1 AssignmentComplete assignment 1 on sketching. Available from

website. Due prior to the beginning of lab 3 (one week).

Reading Assignment for Lab 2

Chapter 1 of Solid Modeling Using SolidWorks 2011

BEFORE lab 2

Lab 2 Assignment

Chapter 1, problems 4 and 6. Email to your TA prior toLab 4 for full credit.

Reading Assignment for Lab 3

Chapter 2 of Solid Modeling Using SolidWorks 2011

BEFORE lab 3


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Have Fun!

PhotoWorks rendering of chess set

DESIGN

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