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Instructor: James Thornburgh

Delve into geometric intersections and developments in CAD design with Instructor James Thornburgh. Learn about line and plane intersections, object intersections, and geometric developments. Explore visibility concepts and practical applications in creating flat patterns. The course includes lab assignments and homework to reinforce learning.

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Instructor: James Thornburgh

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  1. Unit 5Intersections Instructor: James Thornburgh

  2. Agenda • What are geometric intersections? • Visibility • Line and Plane Intersections • Object Intersections • What are geometric developments? • Developments

  3. Geometric Intersections • What are geometric intersections? • How objects meet, and relate to each other • Two Surfaces meet to form a Line • A line and a Surface meet to form a point • Pipe going through a wall • Two Solid objects that will meet • End cuts on Pipes that will be welded

  4. Visibility • Trace back from to an adjacent view from the intersection • Which ever line is hit first is visible

  5. Visibility

  6. Line and Plane Int. • Edge View Method • Find a True Length Line • Find one parallel to folding plane • Horizontal in Top or Front View • Vertical in Side View • Go one view away TL Front Side

  7. Line and Plane Int. • Create a folding line Perpendicular to that line • Create the new Auxiliary View • Project position from adjacent view • Use Distance from 2 views away TL Front Side

  8. CAD Examples

  9. 2 Objects • Use Adjacent view to find point of intersection • Project back through all the views

  10. 2 Objects

  11. CAD Examples

  12. Geometric Developments • What are geometric Developments? • Outside surface of a object laid flat • Flattening out an object (Flat Pattern) • Sheet Metal parts • Cardboard packaging

  13. Developments

  14. Sheet Metal Seams

  15. CAD Examples

  16. Lab Assignments & Homework • Lab • Workbook 13.12, 13.13 • Sheet Metal Flat Pattern (on Website) • Homework • Chapter Questions 1-6 • Online True-False Quiz

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