Transcript Solid Modeling

IENG 475 - Lecture 09
Solid Modeling
7/16/2015
IENG 475: Computer-Controlled
Manufacturing Systems
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Assignment
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Lab
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Download Lab 04 from the Materials page
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Complete the online lab steps for:
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Clock Face – if not familiar with SolidWorks
Clock Back – if your team is making a clock
Clock Base – even if your team is NOT making a clock
You will modify parts – let Dr. Jensen know if other stock is
required
Keep copies of your personal & team SolidWorks CAD models of
the project parts in the team folders on the desktop
(i.e. TUES 100 PM folder if you meet at 1:00 PM on Tuesday)
7/16/2015
IENG 475: Computer-Controlled
Manufacturing Systems
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Design Sequence – (Shigley 1950s)
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Six Steps:
1. Recognition of Need
2. Problem Definition
3. Synthesis
4. Analysis & Optimization
5. Evaluation
6. Presentation
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The steps are usually iterative, and CAD
helps improve the last four stages!
7/16/2015
IENG 475: Computer-Controlled
Manufacturing Systems
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Benefits of CAD
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Increases productivity of designer
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Helps conceptualize product – allows visualization
Improves the quality of the design
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Allows the designer to do more analysis
Allows for more iterations and more varied alternatives
Improves design documentation
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Better conformance to drafting standards
Improved legibility
Fewer data omissions
Creates a manufacturing database
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Can generate BOMs, tolerances,
Stores material specifications, change history
7/16/2015
IENG 475: Computer-Controlled
Manufacturing Systems
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Geometric Modeling
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2-D Systems
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Electronic Paper – lines on screen
Attribute data on file
Low-End Drawing Programs: Excel, Word, Paint, etc.
2-1/2 D Systems
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2-D system with extrude capability
Commonly used for Civil Engineering & Facility Layout
Engineering documentation standards
Can be dimension-driven
Can be animated
Example: AutoCAD, AutoSketch, etc.
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IENG 475: Computer-Controlled
Manufacturing Systems
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Geometric Modeling
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3-D Systems
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Electronic HyperPaper – 3-D lines on screen
Attribute data on file
Engineering documentation standards
Can be dimension-driven
Wire-Frame Drawing Programs: MatLab, etc.
3-D Solid Modeling Systems
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Store surface normal data
Commonly used for Mechanical Engineering
Engineering documentation standards
Usually dimension-driven (parametric)
Can be animated
Example: Pro/ENGINEER, SolidWorks, Inventor, Unigraphics, etc.
7/16/2015
IENG 475: Computer-Controlled
Manufacturing Systems
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Computer-Aided Engineering
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Engineering Analysis
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Use of the geometric model to speed analysis
computations
Examples:
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Mass Properties Analysis
Interference Checking
Tolerance Analysis
Finite Element Analysis / Finite Difference Modeling
Kinematic & Dynamic Analysis
Discrete Event Simulation
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IENG 475: Computer-Controlled
Manufacturing Systems
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Computer-Aided Manufacturing
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Manufacturing Analysis
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Use of the geometric model to speed analysis
computations
Examples:
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Machining Parameter Estimation
Toolpath Analysis
Interference Checking
Process Timing Analysis
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Virtual Process Simulation (Verification)
• CNC Programming – for several equipment models
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IENG 475: Computer-Controlled
Manufacturing Systems
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Integrated CAD / CAM
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Seamless flow of design from art to part:
• Electronic (network) transfer of model means
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smaller chance of error
Virtual modeling capability allows better
understanding and communication
Iterative nature of design is speed enhanced
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IENG 475: Computer-Controlled
Manufacturing Systems
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Questions & Issues
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Lab Assignment
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Lab Team should discuss product ideas
• The final product design must use:
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CNC Mill
CNC Lathe or 3-D printer
Laser Engraver/Cutter
Manual or Single-Cycle Automatic Drill Press
• Finish CAD tutorial
• Make sure to select the Front plane to sketch upon
and extrude in the – Z direction to create parts
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7/16/2015
NO lab report necessary – but know process for future!
IENG 475: Computer-Controlled
Manufacturing Systems
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