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 1P
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.
- The hood latch for an automobile.
Expert Solution & Answer
To determine
Functions and design requirements for hood latch for an automobile.
Explanation of Solution
Functions for hood latch for an automobile are:
- Hood latch is the type of mechanical component that keeps the hood closed shut.
- The latch keeps the hood connected to the automobile.
- It prevents the accidental opening.
Design requirements for hood latch for an automobile are:
- Spring must have enough stiffness to hold the hood.
- Hood latch must be able to work minimum 8 hr per day.
- Applied force to the hood latch should not be too large.
- Mechanical efficiency must be greater than 95%.
- Cost must be moderate.
- Less wear producing material is selected.
- All government and industry safety standards must be met.
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Item 1
used to intermittently operate a piece of equipment at
the end of a lifter arm. The lifter is in contact with the
highest point of the cam at the instant shown and the
lifter is constrained to move only in the vertical
direction. The cam has a radius of r = 4.5 in and is
rotating about point O, which is offset from the center
by a distance c = 3.0 in. The cam's angular position is
measured from the positive x axis and is positive
clockwise. The angular velocity and acceleration are
positive clockwise. (Figure 1)
Figure
(0,0
36°F
Clear
r
W
1 of 1
Par
Find
align
Expr
Vie
Omin
Subn
Provide Feedb
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…
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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