Welcome to
Computer-Aided Drawing and
Fabrication
Fall 2011
Nixie tube
Peter vanBlerkom
Individual project F09
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
CAD/Fab
Course Introduction
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 instrumentation
5. Ability to design and conduct experiments including the
use 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
ME Program Outcomes, Part 2
9. Knowledge of the processes used to manufacture
products
10. Knowledge of contemporary issues in mechanical
engineering
11. Ability to make effective oral presentations
12. Ability to write effectively
13. Ability to function effectively on multi-disciplinary
teams
14. Understanding of professional and ethical
responsibility
15. Understanding of the impact of engineering in a global
and societal context
16. Ability to engage in life-long learning
Why Am I Here?
I love engineering design!
Ive been doing it for 15+ years
CAD modeling is fun, creative
I want to share my knowledge
I want you to develop some useful
engineering skills
CAD/Fab
Course Introduction
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
CAD/Fab
Course Introduction
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 using
SolidWorks 2011, McGraw-Hill, 2011.
SolidWorks software
One-year unlimited version available
See web site for details
CAD/Fab
Course Introduction
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 the
course 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
CAD/Fab
Course Introduction
Quizzes
Five quizzes to test knowledge of
engineering graphics concepts, especially
GD&T
Administered in labs via CULearn
Count 15% of your grade
CAD/Fab
Course Introduction
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, geometric
dimensioning and tolerancing (GD&T), design for
manufacturability, etc.
Quiz hints
SolidWorks examples and tips
In-class workshop exercises (10% of grade 10 max)
CAD/Fab
Course Introduction
10
Interactive Instruction
Lecture: 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 remote
RF clickers
Grading
Lecture
Workshops
10%
Individual
Project
15%
Labs
45%
Team Project
15%
Quizzes
15%
CAD/Fab
Course Introduction
12
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:
CAD/Fab
Course Introduction
13
Sample Individual Projects
Climbing Cam
Chris Carter
CVT Transmission
Eric Eason
Electric Guitar
Steve Szabados
Lightning SYX
Brandon Wheeler
Sample Individual Projects
Spinning Reel - Nick Marsiglia
Sample Group Projects
Academic Honesty
It is expected that each student will do
his/her own work
Acceptable: Collaboration for the purpose
of 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.
The Design Process
Graphics = Language
Graphics is the language of design
It allows clear communication of
design intent
It fueled the industrial revolution
CONCEPT
DESIGN
Two Types of Graphics
The old-fashioned way
CONCEPT
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
DESIGN
CONCEPT
Hand Sketching Is One Of The First Steps
ed
Climbing Ability with 30 lb payload
20+ MPH with different gearing /motors
n portable- under 80 lbs
access to battery compartment to swap batteries
y to fit through a typical doorway
y to work in sandy/dusty conditions
her resistant
Hand Sketching
Why?
Communicate a design idea
As part of the creative design process
CONCEPT
Multi-View Hand Sketch
CONCEPT
Typical CAD Design Process
Create CAD Parts
Combine Parts in
Assembly
Create Drawings of
Parts
Create Drawings of
Assemblies
DESIGN
Typical CAD Output Process
Create Parts List for
Purchasing
Create Assembly
Instructions for
Manufacturing
Create Renderings
for Marketing
FABRICATE
SolidWorks Characteristics
Feature-based
Constraint-based
Parametric
History-based
Associative
DESIGN
SolidWorks Files
Part
.sldprt
Drawing
.slddrw
Assembly
.sldasm
.eprt
.easm
.edrw
DESIGN
Homework
Lab 1 Assignment
Complete 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 to
Lab 4 for full credit.
Reading Assignment for Lab 3
Chapter 2 of Solid Modeling Using SolidWorks 2011
BEFORE lab 3
DESIGN
Have Fun!
PhotoWorks rendering of chess set
