llower type roller follower, off-set to the right by 5mm; lift = 30mm; base c dius = 25mm; roller radius r 60° cam rotation; return stroke during 120° cam rotation; first half of return st th Uniform velocity and second half with UARM; dwell for the remaining period. %3D = 5mm; out stroke with SHM, for 120° cam rotation; d %3D %3D m rotates at 250 rpm

llower type roller follower, off-set to the right by 5mm; lift = 30mm; base c dius = 25mm; roller radius r 60° cam rotation; return stroke during 120° cam rotation; first half of return st th Uniform velocity and second half with UARM; dwell for the remaining period. %3D = 5mm; out stroke with SHM, for 120° cam rotation; d %3D %3D m rotates at 250 rpm

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Q8:-The following particulars relate to a symmetrical circular flank cam operating a flat- faced follower in 4-stroke engine:- base circle radius=25 mm, nose circle radius=8 mm, lift of the valve=10 mm, total angle of action of the cam=120° and the engine speed=1000 rpm. Determine: - (a) the flank radius, (b) maximum velocity and (c) maximum acceleration and retardation of the follower. If the mss of the follower and valve with which it is in contact is 4 kg, find the minimum force to be exerted by the spring to overcome the inertia of the valve parts.
A cam drive is used for a mechanism incorporated in a shoe-sewing machine.The cam follower must rise outward 0.5 in. with cycloidal motion in 0.7 s, dwellfor 0.2 s, fall 0.25 in. with cycloidal motion in 0.5 s, dwell for 0.2 s, fall 0.25 in. withcycloidal motion in 0.5 s and then repeat the sequence. Determine therequired speed of the cam and graphically plot a follower displacementdiagram.
Design a cam to raise a valve with simple harmonic motion through 15mm is 1/3rd of a revolution, keep it fully raised through 1/12th of a revolution and to lower it with SHM in 1/6th of a revolution. The valve remains closed during the rest of the revolution. The diameter of the roller is 20mm and the minimum radius of the cam is 25mm. The axis of the valve rod passes through the axis of the cam shaft. If the cam shaft rotates at uniform speed of 100 rpm; find the maximum velocity and acceleration of the valve during raising and lowering. Also draw the profile of the cam.
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There are two pairs of closed soft tooth surface spur gears A and B Parameters of A: modulus m = 2mm, number of teeth Z, = 40,Z, = 90, width of teeth b =60mm. %3D Parameters of B: modulus m = 4mm, number of teeth Z, = 20,Z, = 45, width of teeth b = 60mm. %3D The accuracy of the two pairs of gears is grade 8, and other conditions are the same. Try to compare the contact fatigue strength and bending fatigue strength of the two pairs of gears? And explain the reason?
I need detail answer do not copy A cam is required for an automated transfer mechanism. The cam follower must rise upward 10 mm with constant velocity in 3.0 sec, dwell for 2 sec, fall with constant velocity in 4 sec, dwell for 1 sec, and then repeat the sequence . a) Determine the required speed of the cam. b) Draw the displacement diagram along with velocity curve. c) The base circle diameter of the cam is 50 mm. Plot the cam profile when a knife-edge follower is incorporated.
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Q5:- A symmetrical cam with circular flank operates a flat-footed follower. The lift is 8 mm, base circle radius is 25 mm and the nose circle radius is 12 mm. If the total angle of cam action is 120°, find the maximum acceleration when the cam shaft rotates at 500 rpm.
A follower for a cylindrical cam is required to travel with simple harmonic motion from datum zero to a maximum rise in 100° of cam rotation, dwell for 80° and return with simple harmonic motion to datum zero in the remaining 180° of cam rotation. Assuming your own values for the rise, base circle diameter and slot dimensions, draw a displacement diagram and suggest a layout for the cylindrical cam.