Lab06_StudentsInstructions
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Simon Fraser University *
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Mechanical Engineering
Date
Dec 6, 2023
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IAT106
1 of 5
IAT106: Spatial Thinking and Communicating
Week 06 Lab
Auxiliary Views, Cross-Sections, and Assemblies
In this lab, you will complete exercises on auxiliary views, cross-sections, and creating assemblies in
CAD. The lab is divided into three parts. For Part I and II, your TA will complete a sample exercise, and
then you will complete others on your own. Your TA will guide you through the exercises for the CAD
component in Part III.
Part I: Auxiliary Views (Chapter 6)
A face will often not be parallel to any of the primary planes in a multi-view drawing, which results in no
view that is true shape and size. Usually, you will want a view of true shape and size, so you will need to
construct an auxiliary view.
Follow along with the TA using the image below. You do not need to hand this exercise in.
TA Demo: Fig 6.17 exercise #1 (pg. 355)
For each exercise listed below, sketch the given views and create a partial auxiliary view for the inclined
surface. You should use graph paper for these exercises. Label the points of interest, label the fold lines
and keep your construction lines. Each drawing should occupy half a page.
In-class:
Fig 6.17 exercise #5 (pg 355)
Homework:
Fig 6.18 exercise #4 and #10 (pg. 356)
2 of 5
Part II: Cross-sections (Chapter 8)
As you saw in the lecture, the interesting parts of an object are often hidden by the object’s surfaces. A
cross-sectional view of the object is needed to communicate design intent in this situation.
Follow along with the TA using the image below. You do not have to hand in this exercise.
TA Demo: Fig 8.57 exercise #12 (pg. 462)
Sketch the given views for each exercise listed below and create a cross-section for the given cutting
plane. You should use graph paper for these exercises. Each drawing should occupy half a page.
In-class:
Fig 8.57 exercise #5 (pg. 462)
Homework:
Fig 8.57 exercise #8 and 15 (pg. 462 and 463)
Part III: Assemblies in CAD
This week you’ll learn to compose multiple parts in CAD to assemble a functioning object.
Exercise
: Start the OnShape learning path by clicking here:
https://learn.onshape.com/learn/learning-path/introduction-to-cad
The TA will help you find the tutorial. You will have to do three courses within this learning path, i.e.,
Introduction to Assembly Design. It will take about 60 minutes to complete these courses. If you can’t
finish it in the lab, you can complete it after lab. Submit the links of the OnShape document via Canvas
before the next lab.
IAT106
3 of 5
Submission Instructions
All
homework
exercises are due next week as indicated in Canvas.
Upload the images from your sketches to the Lab06 container and submit the hard copies to your TA before
the next week’s lab.
For the CAD assemblies, copy the sample file available under Week 06 submissions folder and name it
by following the convention: <YourSFUuserID>_<lab section>.
Assigned Readings from the Textbook
Auxiliary Views:
Ch 6: 6.1 to 6.2.7 and 6.3.4
Cross-sections:
Ch 8: 8.1-8.2 and 8.4.1 - 8.4.6
Criteria
Item
Due
Individual or
Team
Criteria
Activity
Mark
Part
Mark
Total
Auxiliary views
next lab
Individual
1.2
view alignment
0.1
fold and construction lines
0.25
named vertices in all views
0.25
accurate shape
0.6
Cross-sections
next lab
Individual
1.2
view alignment
0.1
section cut lines
hash marks
0.1
0.1
centerlines
0.2
no hidden lines
0.2
accurate shape
0.5
CAD assembly
next lab
Individual
1.6
Subtract 0.5 for every incorrect
mate
Test animation
1.5
0.1
TOTAL
4
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