1. 9/19/2015IENG 475: Computer-Controlled Manufacturing Systems 1 IENG 475 - Lecture 09 Solid Modeling

2. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 2 Assignment Lab Download Lab 04 from the Materials page Complete the online lab steps for: 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)

3. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 3 Design Sequence – (Shigley 1950s) Six Steps: 1. Recognition of Need 2. Problem Definition 3. Synthesis 4. Analysis & Optimization 5. Evaluation 6. Presentation The steps are usually iterative, and CAD helps improve the last four stages!

4. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 4 Benefits of CAD Increases productivity of designer Helps conceptualize product – allows visualization Improves the quality of the design Allows the designer to do more analysis Allows for more iterations and more varied alternatives Improves design documentation Better conformance to drafting standards Improved legibility Fewer data omissions Creates a manufacturing database Can generate BOMs, tolerances, Stores material specifications, change history

5. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 5 Geometric Modeling 2-D Systems Electronic Paper – lines on screen Attribute data on file Low-End Drawing Programs: Excel, Word, Paint, etc. 2-1/2 D Systems 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.

6. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 6 Geometric Modeling 3-D Systems 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 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. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 7 Computer-Aided Engineering Engineering Analysis Use of the geometric model to speed analysis computations Examples: Mass Properties Analysis Interference Checking Tolerance Analysis Finite Element Analysis / Finite Difference Modeling Kinematic & Dynamic Analysis Discrete Event Simulation

8. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 8 Computer-Aided Manufacturing Manufacturing Analysis Use of the geometric model to speed analysis computations Examples: Machining Parameter Estimation Toolpath Analysis Interference Checking Process Timing Analysis CNC Programming – for several equipment models Virtual Process Simulation (Verification)

9. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 9 Integrated CAD / CAM Seamless flow of design from art to part: Electronic (network) transfer of model means smaller chance of error Virtual modeling capability allows better understanding and communication Iterative nature of design is speed enhanced

10. 9/19/2015 IENG 475: Computer-Controlled Manufacturing Systems 10 Questions & Issues Lab Assignment Lab Team should discuss product ideas The final product design must use: 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 NO lab report necessary – but know process for future!