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Mastering Solid Modeling Techniques in AutoCAD

Learn how to extrude and revolve a region to create complex solid models efficiently. Discover alternative methods, use Boolean commands, and optimize your modeling process. Practice with detailed examples and assignments.

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Mastering Solid Modeling Techniques in AutoCAD

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  1. Extruding Solids with AutoCAD Lecture 15 Autumn Quarter

  2. Topics for Today • QUIZ on Sections • Alternative Methods for Solid Modeling • Extrude a Region • Revolve a Region Autumn Quarter

  3. Today’s Project How would you model this using primitives??? It would be complicated! Autumn Quarter

  4. Solid Model of Roller What about this part??? Could it be modeled as a solid using only primitives? It would also be very complicated! Autumn Quarter

  5. We Need New Methods of Modeling! • Extrude a Region • Create a 2D profile and extrude it along a path to create a solid. • Can be used for almost any shape • Revolve a Region • Create a 2D profile and revolve it about an axis to create a solid. • Used for modeling parts that are symmetric about a center axis • Parts can be modeled using both methods and Boolean commands Autumn Quarter

  6. Extruding A Region • Create a 2D “profile” of the part’s external geometry • Extrude this profile through the depth of the part • Using the coordinate system options, create other solids for the holes, cut-outs, or tabs. • Use the Boolean Commands to subtract, etc. Autumn Quarter

  7. Notes on Extruding 2D Profiles • This is a very powerful tool – any closed string of lines can be made into a solid model • It is IMPORTANT that the string of lines be closed! • The part will always be extruded perpendicular to the 2D profile. • Some thought is required about the steps – what to use as the base geometry, what to add/subtract using Boolean commands. Autumn Quarter

  8. Revolving A Region • Create a 2D ‘profile’ of one side of the part’s central axis • Rotate this profile around the central axis of the part • Either draw a center line or know the coordinates of this axis • Profile can be rotated 360° or some other angle • Create holes, cut-outs, or tabs as needed Autumn Quarter

  9. Using these techniques, modeling these parts as solids would require much less steps then modeling using only solid primitives Re-examine the Parts Autumn Quarter

  10. Assignments • Dwg 29 – AC3D Lesson 7 – V-Block • Create model as outlined in the lesson • Create a layout showing the part in the SE Isometric View (use World UCS) • Dwg 30 – AC3D Lesson 7, Exercise 4 • Create the using Extrude Command • Create a layout showing the part in the SE Isometric View (use World UCS) Autumn Quarter

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