Study Guide with Lab Manual for Jeffus' Welding: Principles and Applications, 8th
8th Edition
ISBN: 9781305494701
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 13, Problem 1R
Why is it important to make sure that an FCA welding system is set up properly if out-of-position welds are going to be made?
Expert Solution & Answer
To determine
The necessity of setting FCA properly.
Explanation of Solution
FCA involves ultraviolet light and sparks in its operation. Its major function is to produce welds of high-quality. Slag and welding fumes are generated while running FCA welding. So, proper safety measures should be taken by the welders during FCA welding.
Flux Cored Arc Welding produces good quality welds. Welders are successful in making quality welds by positioning the base metal in flat position. Welding in vertical and overhead position have always chance of developing welds with discontinuities. To overcome the defects like porosity, improper fusion of weld metals and overlapping occur if the FCA is not set-up correctly. If FCA set-up is not according to manufacturers recommendation, the defects like undercut, overfill and slag inclusion may occur. Thus, affecting the quality of the weld. For parent metal present in out-weld position, it is difficult to operate, if there is any error in FCA setup.
Fig:1- Sketch of FCA T-joint
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For the walking-beam mechanism shown in Figure 3, find and plot the x and y coordinates of the
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y
-1.75
Ꮎ
Ꮎ
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The link lengths, gear ratio (2), phase angle (Ø), and the value of 02 for some geared five bar
linkages are defined in Table 2. The linkage configuration and terminology are shown in Figure
2. For the rows assigned, find all possible solutions for angles 03 and 04 by the vector loop
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Table 2
Row
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Link 3
Link 4
Link 5
λ
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Ө
a
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1
7
9
4
2
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60°
P
y 4
YA
B
b
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R3
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A
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a
02
d
05
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Figure 2.
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Problem 4
A .025 lb bullet C is fired at end B of the 15-lb slender bar AB. The
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as shown. Assuming that the bullet becomes embedded in the bar,
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and (b) the percentage loss of kinetic energy as a result of the impact.
(c) After the impact, does the bar swing up 90° and reach the
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=
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y
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30°7
B
A
Chapter 13 Solutions
Study Guide with Lab Manual for Jeffus' Welding: Principles and Applications, 8th
Ch. 13 - Why is it important to make sure that an FCA...Ch. 13 - What major safety concerns should an FCA welder be...Ch. 13 - Why should the FCA welding practice plates be...Ch. 13 - Why should the FCA welds be of substantial length?Ch. 13 - What must be done to a shielding gas cylinder...Ch. 13 - What can happen to the wire if the conduit is...Ch. 13 - Why is it a good idea for a new student welder to...Ch. 13 - Why is the curl in the wire end straightened out?Ch. 13 - What problems can a high-feed roller pressure...Ch. 13 - Referring to Table 13-1, answer the following a....
Ch. 13 - What are the disadvantages of beveling plates for...Ch. 13 - What is the maximum plate thickness that an FCS...Ch. 13 - What is the smallest V-groove angle that can be...Ch. 13 - What is the purpose of the root pass?Ch. 13 - Why is the FCA welding process not used for...Ch. 13 - Why should convex weld faces be avoided?Ch. 13 - What bead pattern is best for overhead welds?Ch. 13 - Why is the appearance of the cover pass so...Ch. 13 - What are the visual inspection standard's...Ch. 13 - Why is the backing strip 2 in. (50 mm) longer than...Ch. 13 - Why should there be a space between the plates...Ch. 13 - What would a small notch at the root weld's...Ch. 13 - What changes should be made in the setup for...Ch. 13 - What problem must be overcome if the amperage and...Ch. 13 - How can higher welding speeds help control...Ch. 13 - How can spatter buildup on the welding gun be...
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