Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
6th Edition
ISBN: 9780134441184
Author: Robert L. Mott, Edward M. Vavrek, Jyhwen Wang
Publisher: PEARSON
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Textbook Question
Chapter 1, Problem 6P
For the devices described in Problems1−14, write a set of functions and design requirements in a similar manner to those in Section1−4. You or your instructor may add more specific information to the general descriptions given.
6. A device to raise a 55-gallon (gal) drum of bulk materials and dump the contents into a hopper.
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Part 2
Set up a spreadsheet solution to this problem. This will require that you derive one
formula to express the relationship between the friction coefficient, the spring constant,
and the spring compression; and a second formula to find the cost of using different slide
and spring types. Set up your spreadsheet as shown below. You can fill in the
"Acceptable?" column manually, rather than using a formula. Turn in a copy of your
spreadsheet/Matlab work
(solve for $)
Friction Spring Constant Spring Compression
M
k
0.1
0.1
0.1
0.2
0.2
0.2
50
100
150
50
100
150
4
Part 3
Your boss has decided to look at a second option. The spring mechanism will be
replaced by a drop box. After leaving the slide, the blocks will travel 5 horizontal feet
through the air and pass through a hole into the drop box. Using the slide you selected
above, determine how far below the slide (h) to place the hole in the drop box.
Yo = 5.2017/5
BLADE
2
RAMPE SLIDE
8⁰
SLIDE
Acceptable?
(Yes or No)
$'
Cost
51
In
DROP…
The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the
following table. Because of the high physical demands of the job, the company's policy is a 23% allowance for workers. (Round
all intermediate calculations to two decimal places before proceeding with further calculations.)
Element
Grasp and place bag
Fill bag
Seal bag
Place bag on conveyor
Performance
Rating
115%
80%
105%
95%
*Bag breaks open; included as delay in the allowance factor
^ Conveyor jams; included as delay in the allowance factor
a) The standard time for this process =
1
8
36
16
8
Observation (seconds)
2
9
40
16
6
3
8
38
13
9
seconds (round your response to two decimal places).
4
12
36
21
31A
5
6
114
18
34^
help! please write the correct answer. no long explanation needed! upvote will be given!
Mechanics of Deformable Bodies
A closed cylindrical vessel contains a fluid pressure of P (Mpa). The cylinder has an inside diameter, d (m) and a wall thickness, t (mm) made of steel alloy with yield strength of 340 Mpa. What is the maximum allowable pressure (MPa) if d = 2.50 m and t = 31.8 mm using a factor of safety of 2.5? (2 decimal places)
Chapter 1 Solutions
Machine Elements in Mechanical Design (6th Edition) (What's New in Trades & Technology)
Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...
Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For the devices described in Problems114, write a...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems 1528, perform the indicated...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...Ch. 1 - For Problems1528, perform the indicated conversion...
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