1. Introduction To Engineering Multi-view Drawings - 3
Agenda
2 View Drawings
3 View Drawings
Sketching - 6

2. Two-View Drawings
Some objects can be fully described by two views, look for:
Symmetry or Bodies of rotation
From Bertoline: Figure 36/ Pg 42
In this case the top and the right side views would be the same. Thus a two view sketch captures all the details.
The book shows how to draw the sketch, so emphasize having the students going through the explanation given in the text book.
Front View
Right Side View
Sketching - 6

3. Other Two-View Examples
These two-view examples show that some symmetrical objects can be fully represented in two views.
Things to emphasize
The center lines in the top view are drawn such that the small dashes cross at the center of the circle and they are separated by some space from the longer dashes.
The center lines in the front view shows the centers of the cylindrical bores.
Sketching - 6

4. Other Two-View Examples
In Class Example:
Do a 2-view drawing of this object
Sketching - 6

5. Steps in Creating the Three-View Sketch – Example Object
From Bertoline: Figure 37/ Pg 43
The next few slides show how to create a three view sketch. A detailed explanation of this procedure is given in the book. Please urge the students to go through this explanation.
Things to emphasize
The glass box approach. How the object projects itself on the front, top and right side face of the glass box.
The animation shows the glass box approach on a different object.
We also define front-view by width and height.
Front View
Right Side View
Top View
Sketching - 6

6. Steps in Creating the Three-View Sketch – Step 1 Block Three Views2
Miter Line
(45o line) 1 2 1
Emphasize the reason for the miter line to be a 45 degree line.
Note: As we cut open the glass box the orientation of the depth of object changes.
Emphasize how the points 1 and 2 in the ‘top view’ map to the corresponding points in the ‘right side view‘.
A1=A2=A3=Height; Shown in front and right side views.
B1=B2=B3=Width; Shown in top and front views. 1
Transferring dimensions across views.
Sketching - 6

7. Steps in Creating the Three-View Sketch – Step 2 Lightly Block Major Features
Sketching - 6

8. Steps in Creating the Three-View Sketch – Step 3 Add Features, Use Miter Line
Sketching - 6

9. Steps in Creating the Three-View Sketch – Add Final Lines
Sketching - 6

10. Steps in Creating the Three-View Sketch – Completed Sketch
Sketching - 6

11. Summary Multi-view drawing tools
Use of hidden and center lines
Conventions on line intersections
Precedence for line types
Two View Drawings - Multi-view drawings for objects with symmetry
Lettering
Creating a Three-View Sketch
Using the Miter Line to transfer dimensions between views
Sketching - 6

12. Assignment #7 Assignment #7: Bertoline, Problem 2.9
Pg. 59, # (41)
Pg. 59, # (47)
Sketch the top, front, and right side views as well as the isometric on the handouts provided in the assignment packet.
Sketching - 6