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Jig and Fixture Design

Edward Hoffman

Chapter 4

Clamping and Workholding Principles - all with Video Answers

Educators

Chapter Questions

Problem 1

Where should the clamp contact the part?

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Problem 2

Why must clamped areas have support?

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Problem 3

What causes tool forces?

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Problem 4

How can tool forces be used to advantage?

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Problem 5

How are the type and amount of necessary clamping forces determined?

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Problem 6

Where should the bulk of the tool thrust be directed?

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Problem 7

How much clamping force should be used?

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Problem 8

What should be done if the clamps cannot hold the part?

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01:39

Problem 9

What is the purpose of spherical washers?

Rashmi Sinha
Rashmi Sinha
Numerade Educator
03:56

Problem 10

What determines the allowable force applied to a bolt?

Vipender Yadav
Vipender Yadav
Numerade Educator

Problem 11

Match the letter values to the numbers indicating the characteristic or application of that clamp type.
a. Strap clamp
b. Screw clamp
c. Toggle clamp
d. Cam clamp
e. Power clamp
f. Vacuum chuck
g. Molded clamp
h. Magnetic chuck
i. Wedge clamp
j. Multiple clamp
1. Generally for ferrous metals
2. Uses epoxy or lowmelt alloys
3. Either flat or conical
4. Lever action
5. Must have single operating point
6. Pivot and lever action
7. Used only for plastics
8. Best pressure control
9. Could loosen when vibrated
10. Operates on spring pressure
11. Equalizes clamping pressure
12. Uses threadgenerated torque

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Problem 12

Identify the workholding devices shown in Figure 4-51.
a. Strap clamp
b. Spiral-wedge clamp
c. Cam clamp
d. Multiple-part clamp
e. Flat-wedge clamp
f. Screw clamp
g. Toggle clamp
h. Nest clamp
i. Conical-wedge clamp
Figure Can't Copy

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