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Computer-Aided Design & Drafting

Computer-Aided Design & Drafting. 007.00 Explain and demonstrate basic CAD commands and techniques. Computer-Aided Design & Drafting. 007.01 Explain CAD terms and concepts. CAD. Computer-Aided Design – Generally reflects design utilizing a 3D modeling database.

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Computer-Aided Design & Drafting

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  1. Computer-Aided Design & Drafting 007.00 Explain and demonstrate basic CAD commands and techniques

  2. Computer-Aided Design & Drafting 007.01 Explain CAD terms and concepts

  3. CAD • Computer-Aided Design – Generally reflects design utilizing a 3D modeling database. • Computer-Aided Drafting – Appropriate if one is producing mainly 2D documents. • Computer Aided Design/Drafting – A combination of the two.

  4. Reasons for Using CAD • Can reduce drawing time and improves productivity • Prevents having to make repeated drawings of often-used symbols • Improves overall appearance and readability of drawing • Allows for easy revision of drawings • Can be transmitted electronically

  5. Reasons for Using CAD • 3D models, as the 3D database can be used to: • generate multiview drawings • construct prototypes • generate code for CAM • increase visualization • analyze mass properties of objects (volume, center of gravity, moments of inertia, etc.)

  6. Websites to visit: • http://students.autodesk.com/ • You can register to download free student versions of the software we use in the course.

  7. Computer-Aided Design & Drafting 007.02 Explain & demonstrate AutoCAD2011 commands and techniques

  8. AutoCAD2011 Tutorials • Day 1- • starting AutoCAD2011, • user interface, • setting up drawing units, drawing limits, • basic draw / erase tool usage

  9. AutoCAD2011 Tutorials • Day 2- • AutoCAD2011 drawing with Snap / Grid. • UCS – user coordinate system / world space concept • Cartesian / Polar Coordinates • Absolute / Relative Coordinates • Day 3 & beyond- • Learning the tools of AutoCAD, and drawing.

  10. Computer-Aided Design & Drafting 007.03 Explain 3D modeling commands and concepts

  11. Types of 3D Modeling Systems • Wireframe Model • Surface Model • Solid Model

  12. Wireframe Modeling • Wireframe modeling is the simplest of all modeling techniques • Based on edges, vertices, and faces

  13. Wireframe Modeling • Wireframe modeling suffers from uniqueness and ambiguity issues

  14. Surface Modeling • Surfaces define the shape of a hollow model. • Surface modeling gives designers a great amount of control and flexibility.

  15. Solid Modeling • Objects are defined as a solid mass. • May contain information about the density, mass, moment of inertia, volume and center of gravity of the object.

  16. Solid Modeling Primitives Triangular Prism Cylinder Rectangular Prism Torus Sphere Cone

  17. Solid Modeling B A • Primitives can be used to build solid geometry with Boolean Operations A  B A  B A - B SUBTRACT UNION DIFFERENCE INTERSECTION INTERSECTION

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