Orthographic Drawing and Visualization
What if you were given just two views of an object such as the one
shown. Could you sketch the third? It’s really not difficult if you
remember how to project points from various views to others.
It is very important in engineering to be able to visualize objects in
three dimensions. This lesson will help you practice that skill.
Let’s review the glass box.
Orthographic Drawing and Visualization
Projecting to a third view
Equal depth
Miter line
Example
Alternate third view projected from top view
Orthographic Drawing and Visualization
Incomplete Side Views (from Technical Drawing, Giesecke, 12
th
ed.)
Orthographic Drawing and Visualization
Projection of Odd Numbers of Spokes (from Technical Drawing, Giesecke, 12
th
ed.)
Orthographic Drawing and Visualization
Visualization
Construct
--------------------------->
Object
Multi-view
<-------------------------Visualize
Practice going one direction will enhance your proficiency in the
other.
Value of models
Orthographic Drawing and Visualization
Visualizing surfaces, edges, and points
An edge is the intersection of two surfaces.
A corner (or vertex) is the interstection of three edges.
SolidWorks example of solid with normal, inclined, and
oblique lines and planes.
How planes meet to form edges.
Plane type Normal
Incline
Normal
Incline
Oblique
Oblique
Orthographic Drawing and Visualization
How planes meet to form edges.
Plane type
Normal
Incline
Normal
Normal
Incline
Normal
Oblique
Oblique
Incline
Oblique
Oblique
Oblique
More visualization
Angles appear true size if they are in a plane parallel to the
view plane.
Lines parallel in space will appear parallel in any orthographic
view.
Orthographic Drawing and Visualization
More visualization
Edges should not appear at surface tangencies (if they do in
SolidWorks, then turn off the setting).
Runouts
Orthographic Drawing and Visualization
Sections of cylinders
Fillets and rounds
Let’s solve the first example.