
DeGarmo's Materials and Processes in Manufacturing
12th Edition
ISBN: 9781118987674
Author: J. T. Black, Ronald A. Kohser
Publisher: WILEY
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Chapter 31, Problem 35RQ
To determine
The design modifications made to cut herringbone gears by hobbing.
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Topic: Kinetics of Particles: - Forces in dynamic system, Free body diagram, newton's laws of motion,
and equations of motion.
TQ1. The 10-kg block is subjected to the forces shown. In each case, determine its velocity
when t=2s if v 0 when t=0
500 N
F = (201) N
300 N
(b)
TQ2. The 10-kg block is subjected to the forces shown. In each case, determine its velocity at
s-8 m if v = 3 m/s at s=0. Motion occurs to the right.
40 N
F = (2.5 s) N
200 N
30 N
(b)
TQ3. Determine the initial acceleration of the 10-kg smooth collar. The spring has an
unstretched length of 1 m.
1
σ
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TQ9. If motor M exerts a force of F (10t 2 + 100) N
determine the velocity of the 25-kg crate when t
kinetic friction between the crate and the plane are μs
The crate is initially at rest.
on the cable, where t is in seconds,
4s. The coefficients of static and
0.3 and μk = 0.25, respectively.
M
3
TQ10. The spring has a stiffness k = 200 N/m and is unstretched when the 25-kg block is at A.
Determine the acceleration of the block when s = 0.4 m. The contact surface between the
block and the plane is smooth.
0.3 m
F= 100 N
F= 100 N
k = 200 N/m
σ
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Q
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Chapter 31 Solutions
DeGarmo's Materials and Processes in Manufacturing
Ch. 31 - How does the pitch diameter differ from the major...Ch. 31 - Prob. 2RQCh. 31 - Prob. 3RQCh. 31 - Prob. 4RQCh. 31 - Prob. 5RQCh. 31 - Explain the meaning of 14 -20 UNC-3A.Ch. 31 - Prob. 7RQCh. 31 - Prob. 8RQCh. 31 - Prob. 9RQCh. 31 - Prob. 10RQ
Ch. 31 - Prob. 11RQCh. 31 - Prob. 12RQCh. 31 - Prob. 13RQCh. 31 - What is the reason for using a taper tap before a...Ch. 31 - Prob. 15RQCh. 31 - Can a fluteless tap be used for threading a hole...Ch. 31 - What provisions should a designer make so that a...Ch. 31 - What is the major advantage of a spiral-point tap?Ch. 31 - Prob. 19RQCh. 31 - Is it desirable for a tapping fluid to have...Ch. 31 - How does thread milling differ from thread...Ch. 31 - What are the advantages of making threads by...Ch. 31 - Prob. 23RQCh. 31 - Prob. 24RQCh. 31 - What is a fluteless tap?Ch. 31 - Why is the involute form used for gear teeth?Ch. 31 - What is the diametral pitch of a gear?Ch. 31 - What is the relationship between the diametral...Ch. 31 - On a sketch of a gear, indicate the pitch circle,...Ch. 31 - What five requirements must be met for gears to...Ch. 31 - What are the advantages of helical gears compared...Ch. 31 - Prob. 32RQCh. 31 - What difficulty would be encountered in bobbing a...Ch. 31 - What is the only type of machine on which...Ch. 31 - Prob. 35RQCh. 31 - Why arent more gears made by broaching?Ch. 31 - What is the most important property of a crown...Ch. 31 - What are three basic processes for machining...Ch. 31 - Which basic gear-machining process is utilized in...Ch. 31 - When a helical gear is machined on a milling...Ch. 31 - Why is a gear-hobbing machine much more productive...Ch. 31 - Prob. 42RQCh. 31 - What are the advantages of cold-roll forming for...Ch. 31 - Prob. 44RQCh. 31 - Under what conditions should shaving not be used...Ch. 31 - Prob. 46RQCh. 31 - Can lapping be used to finish cast iron gears?Ch. 31 - What factors are usually checked in inspecting...Ch. 31 - What are the basic methods for gear finishing?Ch. 31 - A hob that has a pitch diameter of 76.2 mm is used...Ch. 31 - In Figure 31.17, a form-milling operation and...Ch. 31 - A gear-broaching machine can complete the gear in...Ch. 31 - Prob. 4PCh. 31 - If only three gears described in Problem 4 were to...Ch. 31 - Based on the size and shape of the product,...Ch. 31 - What type of engineering materials might be able...Ch. 31 - Prob. 3CS
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