Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Chapter 17, Problem 50RQ
What is cold working?
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37. The vertical shaft shown in Figure P12-37 is driven at a
speed of 600 rpm with 4.0 hp entering through the bevel
gear. Each of the two chain sprockets delivers 2.0 hp to
the side to drive mixer blades in a chemical reactor vessel.
The bevel gear has a diametral pitch of 5, a pitch diameter
of 9.000 in, a face width of 1.31 in, and a pressure angle
of 20°. Use SAE 4140 OQT 1000 steel for the shaft. See
Chapter 10 for the methods for computing the forces on
the bevel gear.
Figure P12-37: P37-Bevel gear drive with two chain
sprockets
Each problem includes the following details:
■Design the complete shaft, including the specification of
the overall geometry and the consideration of stress con-
centration factors. The analysis would show the minimum
acceptable diameter at each point on the shaft to be safe
from the standpoint of strength.
Homework Problems 12-24, 12-35, and 12-37 from
textbook, done in spreadsheet form. Place drawings of the
load, shear, and bending moment body diagrams…
35. The double-reduction, helical gear reducer shown in
Figure P12-35 transmits 5.0 hp. Shaft 1 is the input,
rotating at 1800 rpm and receiving power directly from an
electric motor through a flexible coupling. Shaft 2 rotates
at 900 rpm. Shaft 3 is the output, rotating at 300 rpm. A
chain sprocket is mounted on the output shaft as shown
and delivers the power upward. The data for the gears
are given in Table 12-5. Each gear has a 1412° normal
pressure angle and a 45° helix angle. The combinations of
left- and right-hand helixes are arranged so that the axial
forces oppose each other on shaft 2 as shown. Use SAE
4140 OQT 1200 for the shafts.
Figure P12-35: P35-Double-reduction helical drive
Each problem includes the following details:
■Design the complete shaft, including the specification of
the overall geometry and the consideration of stress con-
centration factors. The analysis would show the minimum
acceptable diameter at each point on the shaft to be safe
from the standpoint of…
Consider 0.65 kg of N2 at 300 K, 1 bar contained in a rigid tank connected by a valve to another rigid tank holding 0.3 kg of CO2 at 300
K, 1 bar. The valve is opened and gases are allowed to mix, achieving an equilibrium state at 290 K.
Determine:
(a) the volume of each tank, in m³.
(b) the final pressure, in bar.
(c) the magnitude of the heat transfer to or from the gases during the process, in kJ.
(d) the entropy change of each gas and of the overall system, in kJ/K.
Chapter 17 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 17 - What is plasticity?Ch. 17 - What are some of the general assets of the...Ch. 17 - Why might large production quantities be necessary...Ch. 17 - What types of deformation may occur in forming...Ch. 17 - What is an independent variable in a...Ch. 17 - What are some considerations regarding selection...Ch. 17 - What is the significance of tool and die geometry...Ch. 17 - Why is lubrication often a major concern in metal...Ch. 17 - What are some of the secondary effects that may...Ch. 17 - Prob. 10RQ
Ch. 17 - Why is it important to be able to predict the...Ch. 17 - Prob. 12RQCh. 17 - Prob. 13RQCh. 17 - Prob. 14RQCh. 17 - Prob. 15RQCh. 17 - Prob. 16RQCh. 17 - Prob. 17RQCh. 17 - What are some of the features that may be...Ch. 17 - What features have contributed to the expanded use...Ch. 17 - What are some of the uses or applications of...Ch. 17 - Prob. 21RQCh. 17 - Prob. 22RQCh. 17 - Prob. 23RQCh. 17 - What type of information about the material being...Ch. 17 - Prob. 25RQCh. 17 - Why is friction such an important parameter in...Ch. 17 - Why are friction effects in metalworking difficult...Ch. 17 - Prob. 28RQCh. 17 - Prob. 29RQCh. 17 - Prob. 30RQCh. 17 - Prob. 31RQCh. 17 - Discuss the significance of wear in metal forming:...Ch. 17 - Lubricants are often selected for properties in...Ch. 17 - What is tribology?Ch. 17 - What are some of the common types of metal forming...Ch. 17 - What is hydrodynamic lubrication? What are some of...Ch. 17 - If the temperature of a material is increased,...Ch. 17 - Define the various regimes of cold working, warm...Ch. 17 - What is an acceptable definition of hot working?...Ch. 17 - What are some of the attractive manufacturing and...Ch. 17 - What are some of the negative aspects of hot...Ch. 17 - Prob. 42RQCh. 17 - Prob. 43RQCh. 17 - If the deformed grains recrystallize during hot...Ch. 17 - Why might a rolled thread offer improved strength...Ch. 17 - How might the temperature of a deforming workpiece...Ch. 17 - Why are heated dies or tools often employed in...Ch. 17 - What generally restricts the upper temperature to...Ch. 17 - What is the primary cause of residual stresses in...Ch. 17 - What is cold working?Ch. 17 - Compared to hot working, what are some of the...Ch. 17 - What are some of the disadvantages of...Ch. 17 - How could cold working be used to reduce the cost...Ch. 17 - Why are cold�forming processes best suited for...Ch. 17 - How can the tensile test properties of a metal be...Ch. 17 - Why is elastic springback an important...Ch. 17 - What is pickling, and how does it remove surface...Ch. 17 - Prob. 58RQCh. 17 - What engineering properties are likely to decline...Ch. 17 - Prob. 60RQCh. 17 - Prob. 61RQCh. 17 - Prob. 62RQCh. 17 - What are some of the advantages of warm forming...Ch. 17 - Prob. 64RQCh. 17 - What material feature is considered to be the...Ch. 17 - Why is isothermal forming considerably more...Ch. 17 - Prob. 67RQCh. 17 - Prob. 1PCh. 17 - Prob. 2PCh. 17 - List and discuss the various economic factors that...Ch. 17 - Prob. 4PCh. 17 - Prob. 5PCh. 17 - Prob. 6PCh. 17 - Prob. 1.1CSCh. 17 - Prob. 1.2CSCh. 17 - Which stainless steel would you recommend? Begin...Ch. 17 - Prob. 1.4CSCh. 17 - Prob. 1.5CSCh. 17 - After drawing and perforating, the residual...Ch. 17 - One of the blades has struck a rock and is badly...Ch. 17 - A second propeller, identical to the one above,...
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