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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Textbook Question
Chapter 36, Problem 67RQ
What is the keyhole effect in plasma arc welding?
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A 10-kg box is pulled along P,Na rough surface by a force P, as shown in thefigure. The pulling force linearly increaseswith time, while the particle is motionless att = 0s untilit reaches a maximum force of100 Nattimet = 4s. If the ground has staticand kinetic friction coefficients of u, = 0.6 andHU, = 0.4 respectively, determine the velocityof the
A
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kg box is pulled along P
,
N
a rough surface by a force P
,
as shown in the
figure. The pulling force linearly increases
with time, while the particle is motionless at
t
=
0
s untilit reaches a maximum force of
1
0
0
Nattimet
=
4
s
.
If the ground has static
and kinetic friction coefficients of u
,
=
0
.
6
and
HU
,
=
0
.
4
respectively, determine the velocity
of the particle att
=
4
s
.
Calculate the speed of the driven member with the following conditions:
Diameter of the motor pulley: 4 in Diameter of the driven pulley: 12 in Speed of the motor pulley: 1800 rpm
4. In the figure, shaft A made of AISI 1010 hot-rolled steel, is welded to a fixed
support and is subjected to loading by equal and opposite Forces F via shaft B.
Stress concentration factors K₁ (1.7) and Kts (1.6) are induced by the 3mm fillet.
Notch sensitivities are q₁=0.9 and qts=1. The length of shaft A from the fixed
support to the connection at shaft B is 1m. The load F cycles from 0.5 to 2kN and
a static load P is 100N. For shaft A, find the factor of safety (for infinite life) using
the modified Goodman fatigue failure criterion.
3 mm
fillet
Shaft A
20 mm
25 mm
Shaft B
25 mm
Chapter 36 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 36 - What is the principal fuel gas used in oxyfuel-gas...Ch. 36 - Why does an oxyfuel-gas welding torch usually have...Ch. 36 - What is the location of the maximum temperature in...Ch. 36 - What function or functions are performed by the...Ch. 36 - What three types of flames can be produced by...Ch. 36 - Which type of oxyfuel flame is most commonly used?Ch. 36 - What are some of the alternative fuels (other than...Ch. 36 - Why might a welder want to change the tip size (or...Ch. 36 - What is filler metal, and why might it be needed...Ch. 36 - What is the role of a welding flux?
Ch. 36 - Oxyfuel-gas welding has a low rate of heat input....Ch. 36 - For what types of applications is ox\fuel-gas...Ch. 36 - What are some of the more attractive features of...Ch. 36 - How does pressure gas welding differ from the...Ch. 36 - In what way does the torch cutting of ferrous...Ch. 36 - Why might it be possible to use only an oxygen...Ch. 36 - How does an oxyacetylene cutting torch differ from...Ch. 36 - What are some of the ways in which cutting torches...Ch. 36 - When might stack cutting be an attractive process?Ch. 36 - What modification must be incorporated into a...Ch. 36 - If a curved plate is to be straightened by flame...Ch. 36 - Why does the flame-straightening process not work...Ch. 36 - What sorts of problems plagued early attempts to...Ch. 36 - What are the three basic types of current and...Ch. 36 - What is the attractive feature of variable...Ch. 36 - What is the difference between a consumable and...Ch. 36 - What are the three types of metal transfer that...Ch. 36 - What are some of the process variables that must...Ch. 36 - What are the four primary consumable-electrode...Ch. 36 - What are some general properties of the...Ch. 36 - What are some of the functions of the electrode...Ch. 36 - How are welding electrodes commonly classified,...Ch. 36 - Why are shielded metal arc electrodes often baked...Ch. 36 - What are the functions of the fluxing constituents...Ch. 36 - What benefit can be obtained by placing iron...Ch. 36 - Why are shielded metal arc electrodes generally...Ch. 36 - Why is the shielded metal arc welding process...Ch. 36 - What are some of the attractive features of the...Ch. 36 - What is the advantage of placing the flux in the...Ch. 36 - What feature enables the welding current in FCAW...Ch. 36 - What are some of the advantages of gas metal arc...Ch. 36 - Describe the relative performance of argon,...Ch. 36 - For what welding conditions would short circuit...Ch. 36 - What is the least desired mode of metal transfer?Ch. 36 - Which of the metal transfer mechanisms is most...Ch. 36 - Describe the metal transfer that occurs during...Ch. 36 - What are some of the benefits that can be obtained...Ch. 36 - What are some of the attractive features of gas...Ch. 36 - What are some of the primary process variables in...Ch. 36 - What is the attractive feature of advanced gas...Ch. 36 - What other gas metal arc welding modifications...Ch. 36 - What benefits can be gained by using a rectangular...Ch. 36 - What are some of the functions of the flux in...Ch. 36 - What are some of the attractive features of...Ch. 36 - What is the primary goal or objective in bulk...Ch. 36 - What is the current (or proper) designation for...Ch. 36 - What types of shielding gases are used in the gas...Ch. 36 - What are some of the features that must be...Ch. 36 - What can be done to increase the rate of filler...Ch. 36 - What are some of the attractive features of gas...Ch. 36 - For the GTAW process, what are the attractive...Ch. 36 - What are some of the advantages of employing a...Ch. 36 - How are the spot welds produced by gas tungsten...Ch. 36 - How is the heating of the workpiece during plasma...Ch. 36 - What are the two different gas flows in plasma arc...Ch. 36 - What are some of the attractive features of plasma...Ch. 36 - What is the keyhole effect in plasma arc welding?Ch. 36 - What is the primary difference between plasma arc...Ch. 36 - What is the primary objective of stud welding?Ch. 36 - What is the function of the ceramic ferrule placed...Ch. 36 - 71- Describe the sequence of activity in flash...Ch. 36 - How is percussion welding different from flash...Ch. 36 - Prob. 73RQCh. 36 - Describe the ideal thermal cut.Ch. 36 - What is the purpose of the oxygen in oxygen arc...Ch. 36 - Why is plasma arc cutting an attractive wav of...Ch. 36 - What techniques can be used to constrict the arc...Ch. 36 - Compared to oxyfuel cutting, what are some of the...Ch. 36 - How can a nontransferred arc plasma torch be used...Ch. 36 - What are some of the attractive features of...Ch. 36 - What are some of the benefits of performing plasma...Ch. 36 - Describe the relative size of the heat-affected...Ch. 36 - Why might the residual stresses induced during...Ch. 36 - Prob. 84RQCh. 36 - What are typical arc welding currents and...Ch. 36 - What are the attractive features or benefits of an...Ch. 36 - What are jigs, fixtures or positioners, and how...Ch. 36 - Describe thermal deburring.Ch. 36 - When welds fail, it is not uncommon for the...Ch. 36 - For each of the conditions in Problem l, could...Ch. 36 - Using the Internet or technical literature,...Ch. 36 - Using the Internet or technical literature,...Ch. 36 - Identify a new or recent EPA or OSHA regulation...Ch. 36 - Magnesium, while not as strong as steel or...Ch. 36 - Numerous joints appear in bicycle frames, some of...
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