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ME 24-688 Introduction to CAD/CAE Tools
Week 2 – Lecture
3D Part Design
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ME 24-688 Introduction to CAD/CAE Tools
Lecture Topics
• Product Lifecycle Process Review
• Detailed Product Engineering
• Challenges and Purpose
• Evolution of CAD
• General 3D Design Concepts
• Case Study Examples
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ME 24-688 Introduction to CAD/CAE Tools
Product Lifecycle
Requirements Management
Portfolio Management
Conceptual Design
Product Engineering
Manufacturing Engineering
Simulation & Validation
Build & Produce
Test & Quality Sales & Distribution
Maintenance & Repair
Disposal & Recycling
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ME 24-688 Introduction to CAD/CAE Tools
Product Lifecycle – Week 2
Portfolio Management
Conceptual Design
Product Engineering
Manufacturing Engineering
Simulation & Validation
Build & Produce
Test & Quality Sales & Distribution
Maintenance & Repair
Disposal & Recycling
Requirements Management
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ME 24-688 Introduction to CAD/CAE Tools
Product Engineering
• Product engineering following conceptual
design is responsible for the continued
development of the concept to a full
technically complete design.
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ME 24-688 Introduction to CAD/CAE Tools
Product Engineering
• Inputs – Conceptual Design Data
– Project / Design Requirements
– Reference Data
• Outputs – Technical Complete Product Design
– Design Data for Manufacturing
– Bill of Materials (BOM)
Product Engineering
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ME 24-688 Introduction to CAD/CAE Tools
Product Engineering Challenges
• Project Schedules
• Design Cost
• Product Quality
• Addressing Requirements
• Changes (All Types)
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ME 24-688 Introduction to CAD/CAE Tools
Product Cost vs. Time L
ife T
ime P
rod
uct
Co
st
Phase of Product Life
Concept Design Testing /
Validation
Production Process
Planning
100%
0%
80%
60%
40%
20%
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ME 24-688 Introduction to CAD/CAE Tools
Rule of Ten
• The “Rule of Ten” specifies that it costs 10
times more for an engineering change at the
next phase.
Time of Change Cost of Change
During Design X
During Design Testing 10 X
During Process Planning 100 X
During Test Production 1,000 X
During Final Production 10,000 X
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ME 24-688 Introduction to CAD/CAE Tools
Software Tools Used
• CAx – Computer Aided Design (CAD)
– Computer Aided Manufacturing (CAM)
– Computer Aided Engineering (CAE)
• PLM – Product Lifecycle Management (PLM)
– Product Data Management (PDM)
– Management of companies intellectual virtual product assets
• ERP – Enterprise Resource Planning (ERP)
– Management of companies deliverable physical product assets
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ME 24-688 Introduction to CAD/CAE Tools
Evolution of Design Tools (CAD)
1980
1990
2000
2010
2020
1970
Manual
Paper
Drafting
2D CAD
Applications
3D General
Application
Purpose 3D
Systems
Full Digital
Prototypes
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ME 24-688 Introduction to CAD/CAE Tools
What is 3D Modeling
• Creation of a digital model of the real
physical object.
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ME 24-688 Introduction to CAD/CAE Tools
3D Design Use
3D CAD Model
CNC Manufacturing
Rapid Prototyping
Visualization
Simulation / Analysis
Design Detail and Form
Automation
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ME 24-688 Introduction to CAD/CAE Tools
3D Downstream Benefits (1 of 3)
• CNC Manufacturing – Programming of Computer Numerical
Control (CNC) manufacturing
equipment from 3D model geometry to
automate manufacturing of production
components.
• Rapid Prototyping – 3D printing of physical prototype
models from 3D model geometry.
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ME 24-688 Introduction to CAD/CAE Tools
3D Downstream Benefits (2 of 3)
• Automation – Fully automated process with low
overhead for creating product
configurations and design
personalization's for clients.
• Design Detail and Form – Ability to design and communicate
complex objects that are almost
impossible to do without 3D design.
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ME 24-688 Introduction to CAD/CAE Tools
3D Downstream Benefits (3 of 3)
• Visualization – Leveraging of 3D design models for
creating realistic visualizations for
communicating designs.
• Simulation / Analysis – Ability to analysis 3D design models
early and often in the design cycle to
optimize the design and identify defects
without physical components.
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ME 24-688 Introduction to CAD/CAE Tools
Autodesk Inventor
• Autodesk Inventor 3D mechanical design
software includes CAD productivity and
design communication tools. The Inventor
model is a detail 3D digital prototype that
can validate the form, fit, and function of a
design.
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ME 24-688 Introduction to CAD/CAE Tools
File Types and Relationships
• Part Files (IPT)
• Assembly Files (IAM)
• Drawing Files (DWG / IDW)
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ME 24-688 Introduction to CAD/CAE Tools
Parametric Modeling
• A parametric model is a 3D model that is
controlled and driven by geometric
relationships and dimensional values.
• With a parametric model, you can change a
value of a feature and the part model is
adjusted according to that value and existing
geometric constraints.
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ME 24-688 Introduction to CAD/CAE Tools
Progression of a Parametric Model
1. Initial Sketch
2. Base Sketch Feature
3. Secondary Sketches
4. Secondary Feature from Sketch
5. Add Placed Features
6. Parametric Change with Update
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ME 24-688 Introduction to CAD/CAE Tools
Solid Model vs. Surface Model
Solid Model Surface Model
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ME 24-688 Introduction to CAD/CAE Tools
Guidelines
• Start your 3D model like you would if you
where making it from real materials in most
cases.
• Create the model to the perfect world
conditions with no tolerances.
• Capture all elements of the model to create
a digital version of the real component.
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ME 24-688 Introduction to CAD/CAE Tools
Gefit Livernois Engineering - Case Study
“By showing Inventor presentations to
our international customers we don’t
have to explain what we’re doing—they
can see it on the screen. Inventor
presentations remove the language
barrier. Over 50% of our customers
reside outside the US.”
Larry Schester
Mechanical Design Supervisor
Gefit Livernois Engineering, LLC
United States
Challenge
Improve Livernois competitive strength in designing machines for the heat
exchange equipment market while improving design accuracy and
decreasing time to delivery.
Results
• 10% fewer errors overall
• Maintained productivity level
despite 20% staff reduction
• 30% reduction in re-work
time; 10% overall cost savings
on new semi-automatic core
builder
• Won contract in part by
presenting customer designs
in 3D with Inventor
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ME 24-688 Introduction to CAD/CAE Tools
Brokk AB - Case Study
“The number of design errors has
decreased substantially since we started
to design with Inventor.”
Anders Norberg
Design Manager
Brokk AB
Sweden
Challenge
Build more innovation into products, improve product quality, and get to
market faster than competition.
Results
• Reduced time to market
by 30%.
• Reduced physical prototypes
from 4 to 2.
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ME 24-688 Introduction to CAD/CAE Tools
Computer-Cluster Projects (CP2)
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ME 24-688 Introduction to CAD/CAE Tools
Cluster Project 1
• Guided instructions for modeling clevis
mount part.
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ME 24-688 Introduction to CAD/CAE Tools
Cluster Project 2
• Guided instructions for modeling flange
manifold part.
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ME 24-688 Introduction to CAD/CAE Tools
Cluster Project 3
• Guided instructions for modeling air cover
part.
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ME 24-688 Introduction to CAD/CAE Tools
Problem Set Assignment
• Model and provide volume of following part.
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ME 24-688 Introduction to CAD/CAE Tools
Demo Topics
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ME 24-688 Introduction to CAD/CAE Tools
File Types
Assembly files: *.iam files reference part files and are referenced by drawing files.
Part files: *.ipt files are referenced by assembly files and drawing files.
Drawing files: *.dwg files reference assembly files and part files.
Inventor Drawing files: *.idw files are interchangeable with *.dwg files in Inventor and reference assembly and part files.
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ME 24-688 Introduction to CAD/CAE Tools
User Interface
Application Menu
Quick Access Toolbar
Ribbon
Ribbon Tabs
ViewCube
Navigation Bar
Browser
3D Indicator
Graphics Window
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ME 24-688 Introduction to CAD/CAE Tools
Browser
Model Browser Assembly Browser
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ME 24-688 Introduction to CAD/CAE Tools
Marking Menu and Overflow Menu
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ME 24-688 Introduction to CAD/CAE Tools
Navigation Bar
ViewCube
SteeringWheel
Pan
View Face
Zoom All
Free Orbit
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ME 24-688 Introduction to CAD/CAE Tools
Function Key Shortcut Keys
• KEY NAME FUNCTION
• F2 Pan Pans the graphics window.
• F3 Zoom Zooms in or out in the graphics window.
• F4 Rotate Rotates objects in the graphics window.
• F5 Previous View Returns to the previous view.
• F6 Isometric View Display the isometric view of the model
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ME 24-688 Introduction to CAD/CAE Tools
Mouse Viewing Tools
• MOUSE FUNCTION NAME
• Click and Drag Mouse Wheel Button Pan
• Roll Mouse Wheel Zoom
• Shift + Click and Drag Mouse Wheel Button Free Orbit
• Double-Click Mouse Wheel Button Zoom All
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ME 24-688 Introduction to CAD/CAE Tools
Basic Sketching Techniques
• Constraint Types
– Perpendicular
– Parallel
– Tangent
– Coincident
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ME 24-688 Introduction to CAD/CAE Tools
Basic Sketching Techniques
• Constraint Types Continued…
– Concentric
– Collinear
– Equal
– Symmetric
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ME 24-688 Introduction to CAD/CAE Tools
Basic Sketching Techniques
• Constraint Types Continued…
– Vertical
– Horizontal
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ME 24-688 Introduction to CAD/CAE Tools
Creating and Using Construction Geometry
• Ribbon: Sketch tab | Format panel
– Construction Geometry
– Centerline Geometry
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ME 24-688 Introduction to CAD/CAE Tools
• Extrude Ribbon: Model tab | Create panel | Extrude Keyboard Shortcut: E
• Extrude Mini-Toolbar Options
Creating Extruded Features
– OK
– Cancel
– Profile
– Direction
– Operation
– Extents
– Output
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ME 24-688 Introduction to CAD/CAE Tools
Creating Revolved Features
• Revolve Ribbon: Model tab | Create panel | Revolve Keyboard Shortcut: R
• Extrude Mini-Toolbar Options
– Extents
– Output
– OK
– Cancel
– Profile
– Axis
– Solid
– Direction
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ME 24-688 Introduction to CAD/CAE Tools
– Chamfer Style
– OK
– Apply
– Cancel
– Selection
Creating Chamfers
• Chamfer Ribbon: Model tab | Create panel | Chamfer Keyboard Shortcut: CTRL+SHIFT+K
• Mini-Toolbar: Click edge in active part, Select Chamfer
• Chamfer Mini-Toolbar Options
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ME 24-688 Introduction to CAD/CAE Tools
Creating Holes
• Hole Ribbon: Model tab | Create panel | Hole Keyboard Shortcut: E
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ME 24-688 Introduction to CAD/CAE Tools
Creating Rectangular Patterns
• Rectangular Pattern Ribbon: Model tab | Pattern panel | Rectangular Keyboard Shortcut: CTRL+SHIFT+R
• Rectangular Pattern Dialog Box
Pattern Feature
Individual Feature
Features
Solid
Pattern Solid
Entire Solid
Solid
Include Work/Surface
Feature
Join
Create new bodies
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ME 24-688 Introduction to CAD/CAE Tools
Creating Circular Patterns
• Rectangular Pattern Ribbon: Model tab | Pattern panel | Circular Keyboard Shortcut: CTRL+SHIFT+O
• Circular Pattern Dialog Box
Pattern Feature
Individual Feature
Features
Rotation Axis
Solid
Pattern Solid
Entire Solid
Solid
Include Work/Surface
Feature
Rotation Axis
Join
Create new bodies
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ME 24-688 Introduction to CAD/CAE Tools
Mirroring Features
• Rectangular Pattern Ribbon: Model tab | Pattern panel | Mirror Keyboard Shortcut: CTRL+SHIFT+M
• Mirror Dialog Box
Mirror Feature
Individual Feature
Features
Mirror Plane
Solid
Pattern Solid
Entire Solid
Solid
Include Work/Surface
Feature
Mirror Plane
Join
Create new bodies
Remove Original
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ME 24-688 Introduction to CAD/CAE Tools
Creating Shell Features
• Shell Ribbon: Model tab | Modify panel | Shell
• Shell Dialog Box
Shell Dialog Box
Inside
Outside
Both: Half
Remove Faces
Automatic Face Chain
Solids
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ME 24-688 Introduction to CAD/CAE Tools
Creating Sweep Features
• Sweep Ribbon: Model tab | Create panel | Sweep
• Sweep Dialog Box
Sweep Dialog Box
Profile
Path
Solid
Remove Faces
Automatic Face Chain
Solids