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Design Process and Visualization. Lecture 2. Topics For Today. Questions on Drawings 1 and 2 ? Purdue Visualization Assessment Online through WebCT (22 minutes) http://class.osu.edu > H191 > Purdue Visualization Introduction To Engineering Design Process - PowerPoint PPT Presentation
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Lect 2 P. 1
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Design Process and Visualization
Lecture 2
Lect 2 P. 2
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Topics For Today
• Questions on Drawings 1 and 2 ?• Purdue Visualization Assessment
– Online through WebCT (22 minutes)– http://class.osu.edu > H191 > Purdue
Visualization• Introduction To Engineering Design Process• Design Visualization & More Freehand Sketching• Work on Drawings 3 and 4• Permanent Seat Assignment Today
Lect 2 P. 3
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Engineering Design Process - Chap 14
• IDEATION• REFINEMENT• IMPLEMENTATION
Lect 2 P. 4
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
What Is Design?
• PROCESS OF CONCEIVING OR INVENTING IDEAS
• COMMUNICATING THOSE IDEAS TO OTHERS• PRIMARY PURPOSES:
– PERSONAL EXPRESSION– PRODUCT OR PROCESS DEVELOPMENT
Lect 2 P. 5
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Art Of Design
• CREATIVITY AND EXPRESSION
• DESIGNING FOR LOOK AND FEEL
• DESIGN FOR FUNCTION AND PURPOSE
Lect 2 P. 6
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Practice Of Engineering Design
• FOR ENGINEERS IT IS DESIGN WITH ANALYSIS
• DESIGNING TO SOLVE A PROBLEM– PRODUCT DESIGN– SYSTEM OR PROCESS DESIGN
Lect 2 P. 7
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Ideation Process
• PROBLEM IDENTIFICATION– Problem Statement– Research– Data Gathering– Objectives– Limitations– Scheduling
Lect 2 P. 8
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Ideation Process
• PRELIMINARY IDEAS– Notes– Sketches/Models– Brainstorm– Synthesis
• PRELIMINARY DESIGN– Evaluation– Selection
Lect 2 P. 9
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Refinement Process
• MODELING– Geometric– Simulation– Animation– Charts, Graphs,
Diagrams
• DESIGN ANALYSIS– Properties– Mechanism– Functional– Human Factors
DESIGN VISUALIZATION
Lect 2 P. 10
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
The Implementation Process
• PLANNING• PRODUCTION• MARKETING• FINANCE• MANAGEMENT• SERVICE• DOCUMENTATION
Lect 2 P. 11
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Design Visualization
• Eye - Hand coordination is important when sketching
• Eye - Mind - Hand connection is crucial to "ideation" sketching
• First step is make a sketch to understand the 3-D object or its design
• Next step is to evolve the design• Reference: BTG Chapter 3
Lect 2 P. 12
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Solid Object Features
• Features or Attributes of an object:– Edges – Faces– Limiting Element(s)– Vertices– Shape (of faces)
Lect 2 P. 13
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
General Visualization Techniques
• Solid Object Combinations– Additive– Subtractive
• Planar Surfaces– Cutting Plane - normal, inclined, oblique– Symmetry
Lect 2 P. 14
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Visualization Techniques For Engineering Drawings
• Image plane– Like 2D picture
• Object-Image Orientation– Gives rise to Primary Axes and thinking about
the third dimension• Multiple Image Planes
– Produces our Multiview Drawings
Lect 2 P. 15
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Missing Line Problem – Example 1One or more lines are missing. Add lines to make views complete.
Lect 2 P. 16
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Example 1 Solution
Missing Line Problem
Lect 2 P. 17
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Missing Line Problem – Example 2One or more lines are missing. Add lines to make views complete.
Limiting element
Lect 2 P. 18
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Missing Line Problem
Example 2 Solution
Lect 2 P. 19
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
In Class Exercise
Hint: Verify by sketching the isometric view
Given the Top and Front views shown here, how many right side
views can you draw?
Discuss at your table
Lect 2 P. 20
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Possible Solutions
There are many more
A B C
Lect 2 P. 21
Engineering H191 - Drafting / CAD
Autumn Quarter Gateway Engineering Education Coalition
Assignments
• Dwg 3 – ML-2 – Add missing line(s). Sketch pictorials as needed to solve problems.– Due at end of today’s lecture
• Dwg 4 – A6 – Draw the missing line in each orthographic set in PENCIL (using red to draw the missing lines is optional)– Due at beginning of next lecture
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