Engineering Drawing. Chapter 3. Multi- View Drawing

Engineering Drawing, Chapter 3, Multi-View Drawing, contains the concept of converting 3D dimensional object to 2D views (Drawing)

1. MULTI-VIEW
DRAWING
(ORTHOGRAPHIC PROJECTION)

2. DEFINITION
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•Multi-view Drawing is one that shows three or
more two dimensional views of three dimensional object
•Provides the shape description of an object.
•When combined with dimensions, Multi- View drawing
serve as the main form of communication between the
designer and manufacturers.

3. •Multi-view drawing is system that allows you to make
a two dimensional drawing of three-dimensional
object.
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4. SYSTEM OF PROJECTION
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❖To represent the six principal views

of an object multi-view drawing uses orthographic
projection
Front -- Rare
Top -- Bottom
Right side --- left side
❖The representation can be done using 1
st
angle projection and 3
rd

angle projection technique. Hence, both 1
st
and 3
rd
angle
projection are used in multi-view drawing.

5. 5
6 principal views of 2D views 3D Object

6. CONT.…
•Taking front view as a reference, in the first angle projection, when
right side view of an object is taken, it is drawn to the left of the
front view and Top view is drawn below the front view.
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7. •Taking front view as a reference, in the first angle projection,
when left side view of an object is taken, it is drawn to the
right of the front view and Top view is drawn below the front
view.
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CONT.…

8. •Taking front view as a reference, in the third angle projection,
when right side view of an object is taken, it is drawn to the
right of the front view and Top view is drawn above the front
view.
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CONT.…

9. •Taking front view as a reference, in the first angle projection,
when left side view of an object is taken, it is drawn to the left
of the front view and Top view is drawn above the front view.
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CONT.…

10. CHOICES OF VIEWS
•The most commonly used views are:
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✓Front view
✓Right Side view and
✓Top view
NOTE: Front view is selected first, then additional
views are selected relative to front view

11. •The following guidelines should be considered when selecting the
front view.
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CONT.…
✓Look for the best shape or most contour
✓Display the most informatics view
✓Show the most natural position of use
✓Provide the longest dimension
✓Contain the least hidden features

12. 12

13. 13

14. THANK
YOU