Transcript
Introduction to Auxiliary Views
ENGINEERING DRAWING-IDWG-101
Aamir Naveed
Lecture # 7
Circles and Ellipses in Auxiliary Views
Circular shapes appear as elliptical when viewed at an angle other than 90°
Hidden Lines in Auxiliary Views
Generally hidden lines should be omitted in auxiliary views unless they are needed to clearly communicate the drawing’s intent
Hidden Lines in Auxiliary Views
Partial Auxiliary Views
Partial auxiliary views are often sufficient to convey information and may be easier to read Usually a break line is used to indicate the imaginary break in
the views
Partial Auxiliary Views
Half Auxiliary Views
If an auxiliary view is symmetrical, and to save space or time, a half auxiliary view may be drawn
Auxiliary Sections
An auxiliary section is simply an auxiliary view in section
The cutting plane line indicates both the location of the cutting plane and the direction of sight for the auxiliary section
Auxiliary Sections
Uses of Auxiliary Views
Auxiliary views are used to show: True length of a line Point view of a line Edge view of a plane True size of a plane
Auxiliary Views
Line of sight (LOS) is an imaginary line from the eye to the object
To see the true shape of a surface, LOS must be perpendicular to that surface
LOS forF.V.
LOS forT.V.
LOS (L.S.V.)
LOS (F.V.)
LOS (T.V.)
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45
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A
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1
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