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Jig and Fixture Design

Edward Hoffman

Chapter 3

Supporting and Locating Principles - all with Video Answers

Educators


Chapter Questions

Problem 1

Where should locators contact the part? Why?

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Problem 2

What is repeatability?

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02:24

Problem 3

What percentage of the part tolerance must be applied to the tool?

Rashmi Sinha
Rashmi Sinha
Numerade Educator
01:24

Problem 4

Why should the tool be foolproof?

Narayan Hari
Narayan Hari
Numerade Educator

Problem 5

What is duplicate locating?

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Problem 6

Select the proper locator from the choices listed to best locate the following sample parts.
A. Figure 3-42. Operation: Drill two .19-inch holes as shown.
1. Groove pad and dowels
2. Vee pad and dowels
3. Ring nest and vee block
Figure Can't Copy
B. Figure 3-43. Operation: Mill two $.22 \times .22$ inch slots as shown.
1. Pin locators
2. Nest locators
3. Adjustable locators
Figure Can't Copy
C. Figure 3-44. Operation: Mill a vee groove as shown.
1. Vee pad and dowel pins
2. Adjustable locator and nest
3. Diamond and dowel pins
Figure Can't Copy
D. Figure $3-45$. Operation: Drill three .25 -inch holes as shown.
1. Diamond pin and equalizer
2. Solid and adjustable locators
3. Adjustable supports and diamond pins
Figure Can't Copy
E. Figure 3-46. Operation: Drill two .25-inch holes as shown.
1. Dowel pin and adjustable support
2. Diamond pin and round pin locators
3. Round pin locator and fixed support
Figure Can't Copy
F. Figure 3-47. Operation: Drill two 44 -inch holes as shown.
1. Ring nest
2. Adjustable locators
3. Sight locators
Figure Can't Copy
G. Identify the locators shown in Figure 3-48.
a. Conical locator
b. Relieved locator
c. Bar locator
d. Round locator
e. Adjustable locator
f. Solid support
g. Plain locator
h. Nesting locator
i. Diamond pin locator
j. Adjustable support
k. Bullet locator
Figure Can't Copy

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