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IENG 475 - Lecture 09

IENG 475 - Lecture 09. Solid Modeling. 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

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IENG 475 - Lecture 09

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  1. IENG 475 - Lecture 09 Solid Modeling 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) IENG 475: Computer-Controlled Manufacturing Systems

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

  4. 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 Benefits of CAD 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. 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. 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 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) 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 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! IENG 475: Computer-Controlled Manufacturing Systems

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