Design of Machinery
6th Edition
ISBN: 9781260431315
Author: Norton, Robert
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 3, Problem 3.67P
Design a fourbar Grashof crank-rocker for 120° of output rocker motion with a quick return time ratio of
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Problem 4-15h
Find the input angles (02) corresponding to the toggle positions of a non-Grashof double-
rocker linkage with link lengths (a, b, c, d) of 10, 10, 10, 20, respectively.
Figure below shows a four-bar linkage (non-scaled diagram) at an instant. The input
angle is equal to the output angle (02 - 04) and the transmission angle is 30°. The
input link is extended beyond joint B and an input force (Fin) is applied at the end of
it, while an output force is drawn from the midpoint of the output link. If an output
force of 30 N is desired from an input force of 10 N, how far the input link should be
extended, i.e., what is the distance from point B to the point where Fin is applied.
Fin
B
out
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02
04
A.
Non-scaled diagram; AB = 10, CD=r4 = 30 (output), all in mm
4. Design a crank-rocker mechanism with a time ratio of Q=1.2, throw angle of A04|max=96
degrees, and time per cycle of t=0.3 sec. Find the imbalance angle, link lengths, and the
crank speed. Also draw this mechanism.
Chapter 3 Solutions
Design of Machinery
Ch. 3 - Define the following examples as path, motion, or...Ch. 3 - Design a fourbar Grashof crank-rocker for 90 of...Ch. 3 - Prob. 3.3PCh. 3 - Design a fourbar mechanism to give the two...Ch. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Repeat Problem 3-2 with a quick-return time ratio...Ch. 3 - Design a sixbar drag link quick-return linkage for...Ch. 3 - Design a crank-shaper quick-return mechanism for a...Ch. 3 - Find the two cognates of the linkage in Figure...
Ch. 3 - Find the three equivalent geared fivebar linkages...Ch. 3 - Design a sixbar single-dwell linkage for a dwell...Ch. 3 - Design a sixbar double-dwell linkage for a dwell...Ch. 3 - Figure P3-3 shows a treadle-operated grinding...Ch. 3 - Figure P3-4 shows a non-Grashof fourbar linkage...Ch. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Design a pin-jointed linkage that will guide the...Ch. 3 - Figure P3-6 shows a V-link off-loading mechanism...Ch. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Figure P3-8 shows a fourbar linkage used in a...Ch. 3 - Prob. 3.24PCh. 3 - Prob. 3.25PCh. 3 - Prob. 3.26PCh. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.30PCh. 3 - Design a Hoeken straight-line linkage to give...Ch. 3 - Design a Hoeken straight-line linkage to give...Ch. 3 - Prob. 3.33PCh. 3 - Prob. 3.34PCh. 3 - Prob. 3.35PCh. 3 - Find the Grashof condition, inversion, any limit...Ch. 3 - Prob. 3.37PCh. 3 - Prob. 3.38PCh. 3 - Prob. 3.39PCh. 3 - Draw the Roberts diagram and find the cognates of...Ch. 3 - Prob. 3.41PCh. 3 - Find the Grashof condition, any limit positions,...Ch. 3 - Prob. 3.43PCh. 3 - Prob. 3.44PCh. 3 - Prob. 3.45PCh. 3 - Prob. 3.46PCh. 3 - Prob. 3.47PCh. 3 - Prob. 3.48PCh. 3 - Prob. 3.49PCh. 3 - Prob. 3.50PCh. 3 - Prob. 3.51PCh. 3 - Prob. 3.52PCh. 3 - Prob. 3.53PCh. 3 - Prob. 3.54PCh. 3 - Prob. 3.55PCh. 3 - Prob. 3.56PCh. 3 - Prob. 3.57PCh. 3 - Prob. 3.58PCh. 3 - Prob. 3.59PCh. 3 - Prob. 3.60PCh. 3 - Prob. 3.61PCh. 3 - Prob. 3.62PCh. 3 - Prob. 3.63PCh. 3 - Prob. 3.64PCh. 3 - Prob. 3.65PCh. 3 - Prob. 3.66PCh. 3 - Design a fourbar Grashof crank-rocker for 120 of...Ch. 3 - Prob. 3.68PCh. 3 - Design a fourbar Grashof crank-rocker for 80 of...Ch. 3 - Design a sixbar drag link quick-return linkage for...Ch. 3 - Design a crank shaper quick-return mechanism for a...Ch. 3 - Design a sixbar, single-dwell linkage for a dwell...Ch. 3 - Design a sixbar, single-dwell linkage for a dwell...Ch. 3 - Prob. 3.74PCh. 3 - Using the method of Example 3-11, show that the...Ch. 3 - Prob. 3.76PCh. 3 - Prob. 3.77PCh. 3 - Prob. 3.78PCh. 3 - The first set of 10 coupler curves on page 1 of...Ch. 3 - Prob. 3.80PCh. 3 - Prob. 3.81PCh. 3 - Prob. 3.82PCh. 3 - Prob. 3.83PCh. 3 - Prob. 3.84PCh. 3 - Prob. 3.85PCh. 3 - Prob. 3.86PCh. 3 - Prob. 3.87PCh. 3 - The side view of the upper section of a...Ch. 3 - Design a fourbar mechanism to give the three...Ch. 3 - Design a fourbar mechanism to give the three...Ch. 3 - Design a fourbar Grashof crank-rocker for 60...Ch. 3 - Design a crank-shaper quick-return mechanism for a...Ch. 3 - Figure P3-22 shows a non-Grashof fourbar linkage...Ch. 3 - Prob. 3.94PCh. 3 - Design a fourbar Grashof crank-rocker for 80...Ch. 3 - Design a sixbar drag link quick-return linkage for...
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- Design a crank-rocker linkage that will move the rocker link between two extreme positions 45 degrees apart. The rocker should take twice the time to moving in one direction that it takes moving in the other. If the fourbar linkage designed above is non-grashof, list two ways in which you would alter the design so that the crank is able to rotate.arrow_forwardDesign of Slider-Crank Mechanisms For Problems 5-11 through 5-18, design a slider-crank mechanism with a time ratio of Q, stroke of | AR4lmax and time per cycle of t. Use either the graphical or analytical method. Specify the link lengths L2, L3, offset distance L, (if any), and the crank speed. Q = 1; IARlmax = 0.9mm; t = 0.4 s. Q = 1.15; IAR4lmax = 1.2 in.; t = 0.014 s. Q = 1.20; IAR4lmax = 0.375 in.; t = 0.025 s.arrow_forwardProblem 4-14a Find the worst value of the transmission angle for a crank-rocker linkage with link lengths (a, b, c, d) of 2, 7, 9, 6, respectively.arrow_forward
- 1)Design a crank sharper quick return mechanism for time ratio of 1:2.5 2)Design a fourbar crank rocker for 120degree of output motion with time ratio of 1:1.2arrow_forwardMANUFACTURING COMPONENT DESI Calculate and classify mechanism for the four-bar linkage (Figure 2) with setting #1 to #5 either in theGrashof, non-Grasshof or special Grashof condition. Name the type of mechanism either in crack-rocker,double-crank or double-rocker.arrow_forward3. Design a slider-crank mechanism with a time ratio of Q=1.25, stroke of AR4lmax=2.75 in., and time per cycle of t=0.6 sec. Find the imbalance angle, link lengths, and the crank speed.arrow_forward
- For every of the mechanisms draw the kinematic diagram and calculate the mobility (Degrees of Freedom). Mention your assumptions if any.arrow_forwardA offset crank-slider mechanism is used in a conveyor loading device. Find the crank length in mm required to generate this motion. Use the design parameters specified below. (Note: A is the crank pivot; C is the coupler-slider joint; B is the coupler-crank joint). - CBDC: 107 mm below and 140 mm to right of A (Note: BDC=Bottom-Dead-Center) - Stroke: 52 mm along a 42° incline (This direction: /. Not this direction: \)arrow_forwardProblem 4-6a The link lengths (a, b, c, d) and the value of 2 for a crank-rocker linkage are defined as 2, 7, 9, 6, 30°, respectively. Draw the scaled linkage. Find all possible solutions (both open and crossed) for angles 03 and 04 graphically. Орen B A LNCS 4 a GCS र 4 4" Crossed (This is not the scaled kinematic diagram.) Problem 4-7a Repeat Problem 4-6a except solve by the vector loop method.arrow_forward
- In a four-bar mechanism ABCD, the fixed link AD is 100 mm, input link AB is 55 mm, coupler BC is 80 mm and the follower CD is 90 mm. Prove that the kinematic chain make crank rocker mechanism. With neat sketch briefly explain how will you convert it into double crank mechanism and double rocker mechanism?arrow_forwardYou are given a set of three links with lengths 2.4 in, 7.2 in, and 3.4 in. Select the length of a fourth link and assemble a linkage that can be driven by a continuous-rotation motor. Is your linkage a Grashof class I or nonGrashof class2 linkage? (Show your work.) Is it a crank-rocker, double- rocker, or double-crank linkage? Why?arrow_forwardfind average piston velocity in each direction ( between limiting positions) for an off-set slider crank mechanism. The crank length is 2". The connecting rod length is 4 " and the offset is 1". the crank speed is 3000 rpm CW.arrow_forward
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