1 / 12

ENGINEERING GRAPHICS 1E7

ENGINEERING GRAPHICS 1E7. Lecture 5: Isometric Projections. Isometric Terminology. The three coordinate axes are called isometric axes Any line parallel to isometric axes is called isometric line

oriana
Télécharger la présentation

ENGINEERING GRAPHICS 1E7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ENGINEERING GRAPHICS1E7 Lecture 5: Isometric Projections

  2. Isometric Terminology • The three coordinate axes are called isometric axes • Any line parallel to isometric axes is called isometric line • A  non-isometric line is a line not parallel   to   any   one   of   the three isometric axis • In isometric projection of cube, the faces of the cube and any plane parallel to them is called isometric planes

  3. Notes • Objects composed entirely of isometric lines can be drawn by taking all measurements parallel to main edges of the enclosing box. • In  an  isometric  drawing,  an angle never appears in its true size. • Non-isometric lines are drawn by transferring the ordinates (which are on isometric lines) of the end of the lines

  4. Objects with Normal Surfaces Make an Isometric Drawing with corner A at the bottom

  5. Objects with Normal Surfaces

  6. NON-ISOMETRIC LINE Objects with Oblique Surfaces • Make an Isometric Drawing with corner A at the bottom

  7. Objects with Oblique Surfaces

  8. Objects with Non-isometric Lines • Make an Isometric Drawing with apex A facing front

  9. Objects with Non-isometric Lines • Non-isometric lines are drawn with box construction and offset measurements • Non-isometric lines are not drawn in true length in isometric drawing (BA is shorter than CA in this drawing)

  10. Irregular Objects • Make an Isometric Drawing of the following irregular object (pyramid)

  11. Irregular Objects • OA and OB offsets help to locate apex O • Complete box construction may not be needed in each case

  12. Notes • Axonometric projection shows all 3 dimensions, length, width and height • The isometric lines are only drawn to scale. • Inclined and oblique surfaces are drawn using end coordinates • Angles, irregular curves require special techniques • Box construction and offset measurements are common methods

More Related