Introduction to Engineering 3-D Sketch from Multi-view

1
Introduction to Engineering3-D Sketch from
Multi-view

• Process for making an isometric sketch given a
  multi-view drawing

2
Multi-View to Isometric

• General Approach
• Identify H, W, D of an object
• Lightly sketch box with dimensions H, W, D
• Cut away material you dont need
• See Video

3
Tips for Making Isometric Sketches

• For more complex objects, try
• Identifying the types of surfaces on the object
• Principal
• Inclined
• Oblique
• Labeling the vertices and using the coordinates
  of the vertices to draw the isometric

4
Surface Type A Principal Surface
Miter Line
1
2

• True size in one view
• Edge (line) in other 2 views
• Plane ? Line

4
3
A
4,1
3,2
2,1
3,4
5
Surface Type B Inclined Surface

• Characteristic shape in 2 views but not true size
  in either
• Edge (line) in 3rd view

1
2
4
3
4,1
1
4
2
3
3,2
6
Surface Type C Oblique Surface

• Characteristic shape in all 3 views but true size
  in none

2
Q In which views could you get the true length
of edges of this oblique surface? 1 to 2
1 to 3 3
to 2
1
3
C
2
1
1
2
3
3
7
General Procedure

1. Step 1 - sketch the box for isometric view
2. Step 2 - identify type of each surface of object
3. Step 3 - draw surfaces on pictorial
4. Step 4 - compare views and pictorial
5. Step 5 - inspect views to see what material is
   carved away from the box.
6. Step 6 - complete pictorial

8
Example The Three View Sketch
9
Ex - The Isometric Grid
10
Ex - Box Object
11
Ex Choose a Surface
Identify the Principal Surface A
APrincipal Surface
12
Ex Map Surface
Identify the Inclined Surface B
BInclined Surface
13
Ex Map Surface
CPrincipal Surface
14
Ex Map Surface

• Corner removed

D Oblique Surface
15
Ex Notch
Principal Surface
16
Ex Notch
17
Ex Notch
18
Ex Notch
Q What kind of a surface would have its
characteristic shape in 2 views?
This surface would show up as an edge in the 3rd
view
Inclined Surface
?
19
Finished Example
20
Recall the Six Principal Views
21
Review Slide Surface Types
Inclined Surface B
Principal Surface A
Oblique Surface C
22
Summary

• Principal, Inclined and Oblique surfaces
• How to identify these surfaces

23
Assignment

• Assignment 15
• Bertoline, Problem 2.10
• Pgs. 60 61 s (1), (6), (8), (19)
• Given the multi-view drawing, sketch both the
  multi-view as well as the corresponding isometric
  on the sheets provided in the Assignment Packet.