1. Section 3

1.10. Explore

Mathematics 20-3 Module 5

Section 3: Exploding Objects

 

Explore

 

So far in Module 5 you have explored drawing three-dimensional objects using orthographic views, isometric views, and one-point perspectives. In this lesson you will explore exploded-view drawings and, whenever possible, drawing parts using the same scale factor relative to the original object.

 

Watch “Technical Drawing Applications” to see how exploded-view drawings and scale drawings are used in a variety of applications.

 

This is an animated exploded view of a compass.

 


search

To see other applications of exploded-view drawings, open your favourite search engine and use the keywords “tech student” and “exploded drawings - 4.”

 

One of the features of exploded views is annotations. Annotations are the labels that identify component parts in exploded views.

 

Look back at the two examples provided in the animations. Do you notice how the “wheels” and “eccentric cams” are labelled in the exploded view of the toy duck? The parts of the compass are all numbered. How could numbering parts be helpful?

 

Try This 2

 

Xenia is interested in pursuing a career in design. She took two pictures: one of a flashlight assembled and one of the flashlight taken apart. Her photograph of the components of the flashlight shows the parts in the order they were removed. She used her photographs to draw an annotated exploded view of the flashlight.

 

These are two photos of a flashlight. One of the flashlight assembled and one of it taken apart.

  1. Print a copy or copy and paste Xenia's Pictures into a drawing or word-processing program. Label the picture to make the picture annotated. Draw in dashed lines to indicate the method of assembly. hint

  2. When Xenia drew her exploded view, she was careful to maintain the same scale factor for each component that she drew. She drew each dry cell (battery) one-third the length of each actual dry cell. What scale factor should she use to draw the bulb? hint hint

  3. What feature of exploded views shows that the components are assembled in the order in which they are drawn?

course folder Save your responses to your course folder.

 

The actual batteries are three times larger than the drawing. The cap, for example, should also be drawn one-third smaller than the actual cap. The scale of the drawing is 1:3.
drawing size:actual size
Make up names for the parts if you are not sure what the parts are called.