EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
8th Edition
ISBN: 9780176919764
Author: Jeffus
Publisher: VST
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Chapter 11, Problem 4R
What causes the electrode to bird-nest?
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Show all work please
Draw top, side, front view With pen(cil) and paper
Multi view drawing and handwriting all of it
A wheel of diameter 150.0 mm and width 37.00 mm carrying a load 2.200 kN rolls on a
flat rail. Take the wheel material as steel and the rail material as cast iron. Assume the
figure given, which is based on a Poisson's ratio of 0.3, is applicable to estimate
the depth at which the maximum shear stress occurs for these materials. At this critical
depth, calculate the Hertzian stresses σr, σy, σz, and Tmax for the wheel.
1.0
0.8
0, т
Ratio of stress to Pmax
0.4
0.6
90
69
0.2
0.5b
b
1.5b
Tmax
2b
Distance from contact surface
The Hertizian stresses are as follows:
02 = or = -23.8 psi for the wheel =|
necessary.)
σy for the wheel =|
MPa
σz for the wheel =
MPa
V4 for the wheel = |
MPa
2.5b
ཡི
3b
MPa (Include a minus sign if
Chapter 11 Solutions
EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
Ch. 11 - What items make up a basic semiautomatic welding...Ch. 11 - What must be done to the shielding gas cylinder...Ch. 11 - Why is the shielding gas valve "cracked" before...Ch. 11 - What causes the electrode to bird-nest?Ch. 11 - Why must all fittings and connections be tight?Ch. 11 - What parts should be activated by depressing the...Ch. 11 - What benefit does a welding wire's cast provide?Ch. 11 - What are the advantages of using a feed roller...Ch. 11 - Why should the feed roller drag prevent the spool...Ch. 11 - Why must you always wind the wire tightly into a...
Ch. 11 - How is the amperage adjusted on a GMA welder?Ch. 11 - What effect on the welding current does increasing...Ch. 11 - Using Table 11-1, determine the amperage if 400...Ch. 11 - What happens to the weld as the electrode...Ch. 11 - What is the effect on the weld of changing the...Ch. 11 - What are the advantages of adding oxygen or CO2 to...Ch. 11 - What reactive gases are used with argon for GMA...Ch. 11 - What are the advantages of using CO2 for making...Ch. 11 - What is mill scale?Ch. 11 - What type of porosity is most often caused by mill...Ch. 11 - What should the welder watch if the view of the...Ch. 11 - When making a vertical weld and it appears that...Ch. 11 - What are the advantages of making vertical down...Ch. 11 - How can small weld beads be maintained during...Ch. 11 - How can spatter be controlled on the nozzle when...
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