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Chapter 14 Axonometric Projection

Chapter 14 Axonometric Projection. (Pictorial Drawing). Given This!. Draw this!. Types of Axonometric Projection. Isometric – has equal foreshortening along each of the three axis directions

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Chapter 14 Axonometric Projection

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  1. Chapter 14 Axonometric Projection (Pictorial Drawing)

  2. Given This!

  3. Draw this!

  4. Types of Axonometric Projection • Isometric – has equal foreshortening along each of the three axis directions • Dimetric – has equal foreshortening along two axis directions and a different amount on the third axis • Trimetric – has different foreshortening along all three axis directions

  5. Types of Axonometric Projection

  6. Isometric Projection • The projections of the edges of a cube in isometric projection make angles of 120 degrees with each other

  7. Isometric Projection • Lines of an isometric drawing that are not parallel to the isometric axes are called nonisometric lines • These lines are not equally foreshortened

  8. Isometric Projection • Isometric scales can be used to draw correct isometric projections • All distances are approximately 80% of true size

  9. Isometric Drawings • Isometric drawings, unlike isometric projections, are drawn using the full length measurements of the actual drawing and lacks foreshortening • The isometric drawing is about 25% larger than the isometric projection

  10. Iso Paper

  11. Making an Isometric Drawing

  12. Sketch an Isometric Drawing

  13. Iso Paper

  14. SOLUTION

  15. Sketch an Isometric Drawing

  16. Iso Paper

  17. SOLUTION

  18. Hidden Lines and Centerlines • Hidden lines are omitted unless they are needed to make the drawing clear • Center lines are shown if they are needed to indicate symmetry or if they are needed for dimensioning

  19. Angles in Isometric • Angles project true size only when the plane containing the angle is parallel to the plane of projection • An angle may project to appear larger or smaller than the true angle depending on its position

  20. Circles in Isometric • If a circle lies in a plane that is not parallel to the plane of projection, the circle projects as an ellipse • Ellipses can be constructed using offset measurements

  21. Ellipses in Isometric • Approximate ellipses can be constructed from arcs

  22. Drawing Ellipses

  23. Drawing Isometric Cylinders

  24. Irregular Objects

  25. Irregular Objects

  26. Curves in Isometric

  27. Screw Threads in Isometric • Parallel partial ellipses equally spaced at the symbolic thread pitch can be used to represent screw threads

  28. Arcs in Isometric

  29. Intersections

  30. Spheres in Isometric

  31. Isometric Sectioning • Isometric sectioning is useful in drawing open or irregularly shaped objects

  32. Isometric Dimensioning • Isometric dimensions are similar to dimensions on multiview drawings but should match the pictorial style

  33. Exploded Assemblies

  34. Piping Diagrams

  35. Sketch an Isometric Drawing

  36. Iso Paper

  37. Solution

  38. Sketch an Isometric Drawing Front view given should be the rear view of the Isometric Drawing Scale 1:4

  39. Iso Paper

  40. Solution

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