Engineering Drawing Tips : Orthographic projection
Conventional Orthographic
Views
Lines on an
engineering drawing signify more than just the geometry of the object and it is
important that the
appropriate line type is used.
Line Thickness
For
most engineering drawings you will require two thickness', a thick and thin
line.
The
general recommendation are that thick lines are twice as thick as thin lines.
A thick continuous line is used
for visible edges and outlines.
|
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A thin line is used for hatching,
leader lines, short centre lines, dimensions and projections.
|
Line Styles
Thin chain lines are a common feature on engineering drawings
used to indicate centre
lines. Centre lines are used to identify the centre of a circle,cylindrical
features, or a line of symmetry.
Dashed lines are
used to show important hidden detail for example wall
thickness and
holes..
•Visible
lines takes precedence over all other lines
•Hidden
lines and cutting plane lines take
precedence over center lines
•Center
lines have lowest precedence
Example is as shown above.
Hope you find it useful!
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