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Orthographic Drawing

Orthographic Drawing. Multiview Projection. Projection  a view of an object Is a photograph enough to describe an object? A number of views, systematically arranged. Perspective Projection. Source, at a definite distance. Orthographic Drawing. Source, at an infinite distance.

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Orthographic Drawing

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  1. Orthographic Drawing

  2. Multiview Projection • Projection  a view of an object • Is a photograph enough to describe an object? • A number of views, systematically arranged...

  3. Perspective Projection Source, at a definite distance.

  4. Orthographic Drawing Source, at an infinite distance

  5. Four Types of Projection

  6. Six Standard Views TOP REAR RIGHT LEFT FRONT BOTTOM

  7. Six Standard Views

  8. Six Standard Views

  9. Orthographic Drawing

  10. Orthographic Drawing

  11. Orthographic Drawing

  12. Unfolding the Glass Box The Glass Box

  13. Top & Right Side Views

  14. Third Angle Projection T Mitter Line D/2 D/2 D/2 D/2 F R A transparent picture plane is set up between object and the station point of an observer’s eye.

  15. Third Angle Projection Mitter line can only be used when the views are placed equidistantly. ?????

  16. First Angle Projection (Europe & Asia) Mitter Line R F The observer looks through the object to the planes of projection. D/2 D/2 D/2 D/2 T

  17. Views of Surfaces • To effectively create and interpret multiview projections, you have to consider the elements that make up most solids: • SURFACES • bounded by straight lines, or curves.

  18. Edge View

  19. True View

  20. Foreshortened View

  21. Normal Surface Parallel to the plane of projection (true shape&size)

  22. Perpendicular to a plane, but inclined or tipped to adjacent planes. Edge vien on perp. Plane, fs view on inclined planes Inclined Surface

  23. Tipped to all planes. FS on all planes. Oblique Surface

  24. True length in adjacent planes Point on perpendicular Plane. Normal Edge

  25. True length in parallel plane (angled) Shortened on adjacent planes (vertical / horizontal) Inclined Edge

  26. Shortened & Angled Shortened & Angled Oblique Edge

  27. Angles

  28. Vertices • A corner or point, intersection of 3 planes

  29. Meaning of a Point • A vertex • Point view of an edge

  30. Meaning of a Line • Visible or hidden: • An edge (intersection between 2 surfaces) • Edge view of a surface • Limiting element of a curved surface

  31. Hidden Lines Dashed hidden lines are used to represent features that would be hidden behind other surfaces.

  32. Center Lines Used to indicate symmetrical axes of circles

  33. Order of Drawing • Block out the views • Locate centerlines • Start details and arcs first • Draw dominant details • Check your views

  34. Now : Guess the object....

  35. So the Quiz Object....

  36. Guess the object....

  37. The object .... Is a rectangular prism

  38. Guess the object....

  39. The object ... Is a cylindrical prism

  40. Third Angle Projection...

  41. So The Object...

  42. THAT’S IT FOR TODAY! ...

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