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Product Design and Development, MME2259a Fall 2011

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Title: Effect of Design Quality on Manufacturing Cost [Ull97, p.3] Author: Engineering Last modified by: Paul Kurowski Created Date: 12/6/2000 12:49:31 PM – PowerPoint PPT presentation

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Title: Product Design and Development, MME2259a Fall 2011


1
Product Design and Development, MME2259a Fall
2011
Prof. Paul M. Kurowski, Ph.D., P.Eng. Department
of Mechanical and Materials Engineering The
University of Western Ontario
2
WHAT IS A DESIGN?
  • Design is the quest for simplicity and order.
  • Explicit in the term design are the concepts of
    order and organization.
  • Design is the process of inventing artifacts that
    display a new physical order, organization, and
    form in response to function.
  • Design is a conscious and intuitive effort
    directed toward the ordering of the functional,
    material, and visual requirements of the problem.
  • Design is a statement of order and organization.
    Its goal is unity. It must hold together. It is
    an expression of the human ubiquitous quest for
    order.
  • Design implies intention, meaning, and purpose.
  • The planning and patterning of any act toward a
    desired, foreseeable end constitutes the design
    process.

3
DESIGN IS COOL
The notion of bringing something into being that
did not exist before, whether from scratch or on
the foundation of an existing design, is
fascinating. Could there be a headier pursuit
than participating in creation itself? Machine
Design August 7, 2008
4
OBJECTIVE MME2259a
Considering that designing is creative activity,
the objective of MME2259a is to introduce design
methodology and design tools (applicable to
Mechanical Engineering) which are used to execute
this creative design process with the objective
of creating products that satisfy customers
needs.
5
OBJECTIVE MME2259a
Please download from our web page and read
(CDEN2006)
6
PROCESS OF DESIGN
Products that Meet Need
Design Need
Paths of the Design Process
Design Knowledge
Manufacturing
Electronics
Material Science
Economics
Kinematics
Thermodynamics
Physics
Mechanics
7
TYPES OF ENGINEERING DESIGN
  1. Selection Design choose item(s) from a catalog
  2. Configuration Design organize the packaging of
    components
  3. Parametric Design finding variables or
    parameters.
  4. Redesign, alternative design modifying an
    existing product.
  5. Original Design develop a totally new product.

8
SELECTION DESIGN
  • Given
  • Shaft diameter 20 mm
  • Speed 2000 rpm
  • Radial force 6675 N (or 1500 lb)
  • Require
  • To select an appropriate bearing.
  • Possible Solutions

Housing
Bearing
Shaft
6675 N
20 mm
Ullman 1992
9
SELECTION DESIGN
Fundamentals of Engineering Design Barry Hyman,
Prentice Hall
10
CONFIGURATION DESIGN
  • Computer components
  • Possible configurations for a computer (in each
    case, the bottom of the sketch represents the
    front of the computer).

Keyboard
Mother board
Floppy drive
Power supply
Extension slots
11
CONFIGURATION DESIGN
Fundamentals of Engineering Design Barry Hyman,
Prentice Hall
12
CONFIGURATION DESIGN
Configuration design Selection and arrangement of
components on a product Selection and arrangement
of features on a part Factors in configuration
design Spatial limitations Product interactions
with other physical objects and the
user(s) Maintenance Wear Desired customization by
the user Need to include standard parts and
assemblies Need to conform to industrial
standards Need to replace consumable materials
13
CONFIGURATION DESIGN
Design for function check list Strong Stiff or
flexible Buckle resistant Thermal
expansion Vibration Noise Heat transfer Fluids
transport/storage Energy efficient Stable Reliable
Human factors/ergonomics Safe Easy to
use Maintainable Repairable Durable Life cycle
cost Styling/aesthetics
Configuration alternatives can be analyzed
according to Design for function Design for
assembly Design for manufacture
14
PARAMETRIC DESIGN
  • Example
  • Design a cylindrical storage tank that
  • holds 4 m3 of liquid.
  • Volume V p x r2 x l
  • thus 4 p x r 2 x l
  • 1.273 r 2 x l
  • Note There are an infinite number of values for
    (r, l) therefore more information is necessary.

l
2r
15
PARAMETRIC DESIGN
Fundamentals of Engineering Design Barry Hyman,
Prentice Hall
16
REDESIGN
1890 Humber bicycle
1990 Trimble bicycle
17
ORIGINAL DESIGN ?
Boeing 787 www.elmundo.es
18
ANALYSIS VS. DESIGN
  • Analysis Problem a well defined problem with
    one correct solution.
  • Design Problem an ill-defined problem with
    numerous satisfactory solutions.
  • Example
  • The problem of designing a simple lap joint.

Analysis Problem What size of SAE Grade 5
bolt should be used to fasten together two pieces
of 1045 sheet steel, each 4 mm thick and 60 mm
wide, which are lapped over each other and loaded
with 100N ?
Design Problem Design a joint to fasten
together two pieces of 1045 sheet steel, each 4
mm thick and 6 cm wide, which are lapped over
each other and loaded with 100N.
19
ANALYSIS VS. DESIGN
SAE Specifications for Steel Bolts http//www.ame
ricanfastener.com/technical/grade_markings_steel.a
sp
20
MME2259a WEBPAGES
http//www.eng.uwo.ca/MME2259a/2011 http//www.en
g.uwo.ca/designcentre http//www.eng.uwo.ca/mecha
nical/undergrad/current/course_outlines.htm
21
DESIGN PROJECT
  • The goal of the term project is to design a
    consumer product such as log splitter,
    wheelbarrow, utility trailer, boat trailer,
    towing hitch, bicycle hitch carrier, car
    turntable etc. The selected project must allow
    the design team to use CAD design techniques such
    as assemblies, weldments and sheet metal.
  • It also must allow the use of Motion Simulation.
    The choice of product will be made by design team
    and will be approved by course instructor.
  • Each design team will
  • identify the need
  • establish relevant design specifications
  • generate and evaluate several concepts
  • develop detailed design including engineering
    drawings
  • develop design documentation
  • use design simulation (limited to Motion
    Simulation) to investigate product performance

22
LAB SCHEDULE
23
MARKING
Individual marks Two individual
assignments (7.5 each) 15 Final examination
(closed book) 40 Team
marks Individual Design Notebook 9 Product
Development File (PDF)
14 Final report
14 Design presentations (1 each)
3 Final presentation
5 Adjusted
by team participation 5 bonus will be assigned
to the final mark upon successful completion of
Certified SolidWorks Associate (CSWA) Exam
24
TEAM WORK
MARK DISTRIBUTION To make the grading process
fair, each member of the design team will
evaluate every member of the group (including
themselves) for the percent of his/her
contribution to the project. These confidential
evaluations must be justified and supported by
written commentary. The resultant evaluations
will be averaged to find each student's
contribution and to determine the students
individual grade. For example, if there are
four students in a group and each student makes
an equal (25) contribution then all members will
receive the same grade for the project. However,
if the individual contributions vary then the
grades will be corrected by the difference from
25. For example, if the group mark for the
project was 80 and student A makes a 40
contribution to the project then his/her mark
will be 95 (i.e. 80(40 - 25)). Furthermore, if
student B in the same group makes a 30
contribution then that student will be assigned a
mark of 85 (i.e. 80 (30 - 25)). Finally, if
students C and D make contributions of 20 and
10 then their individual marks will be 75 and
65, respectively. Note that the maximum
possible mark for the project is 100.
25
TEAM WORK
For example, if there are four students in a
group and each student makes an equal (25)
contribution then all members will receive the
same grade for the project. However, if the
individual contributions vary then the grades
will be corrected by the difference from 25.
For example, if the group mark for the project
was 80 and student A makes a 40 contribution to
the project then his/her mark will be 95 (i.e.
80(40 - 25)). Furthermore, if student B in the
same group makes a 30 contribution then that
student will be assigned a mark of 85 (i.e.
80(30 - 25)). Finally, if students C and D make
contributions of 20 and 10 then their
individual marks will be 75 and 65,
respectively. Note that the maximum possible
mark for the project is 100.
26
DESIGN PROCESS AND THE PRODUCT LIFE-CYCLE
Product Design
Manufacturing Process Design
Requirements Definition
Manufacturing System Concept Development
QFD Process FMEA Simulation
Concept Development
QFD Process FMEA Taguchi DFM Validation
Testing Poke Yoke Simulation
Detailed Process Design
Detailed Product Design Prototype
The extend of our design project
Manufacturing
Service Support
27
TYPES OF ENGINEERING DESIGN - AGAIN
In our design project focus will be on selection
design
  1. Selection Design choose item(s) from a catalog
  2. Configuration Design organize the packaging of
    components
  3. Parametric Design finding variables or
    parameters.
  4. Redesign, alternative design modifying an
    existing product.
  5. Original Design develop a totally new product.

28
MME2259a vs ES1050
29
COURSE PROGRESS
Lectures
Labs
SolidWorks
30
CSWA EXAM - BONUS
https//www.virtualtester.com/solidworks/branding/
user-portal/user-portal.html
31
http//blogs.solidworks.com/teacher/2011/09/linkin
g-undergraduate-engineering-curriculum-around-soli
dworks.html
32
HOMEWORK
  • Form design teams - 4 people
  • Buy design notebook and bring it to the lab next
    week
  • Think about your design project, well decide
    next week in the lab

33
DESIGN PROJECT
  • The goal of the term project is to design a
    consumer product such as log splitter,
    wheelbarrow, utility trailer, boat trailer,
    towing hitch, bicycle hitch carrier, car
    turntable etc. The selected project must allow
    the design team to use CAD design techniques such
    as assemblies, weldments and sheet metal.
  • It also must allow the use of Motion Simulation.
    The choice of product will be made by design team
    and will be approved by course instructor.
  • Each design team will
  • identify the need
  • establish relevant design specifications
  • generate and evaluate several concepts
  • develop detailed design including engineering
    drawings
  • develop design documentation
  • use design simulation (limited to Motion
    Simulation) to investigate product performance

34
truss.SLDPRT
35
sheet.SLDPRT
36
NEW COMPUTER LABS
37
NEW COMPUTER LABS
38
NEW COMPUTER LABS
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