knife follower motion interval described below: 1. To raise the valve through 50 mm during 120° rotation of the cam; 2. To keep the valve fully raised through next 30°; 3. To lower the valve during next 60°; and 4. To keep the valve closed during rest of the revolution i.e. 150° The displacement of the follower being raised and lowered, is to take place with simple harmonic motion Determine: 1. The required time for each interval? 2. Draw the displacement against time, diagrams for one complete revolution of the cam.

knife follower motion interval described below: 1. To raise the valve through 50 mm during 120° rotation of the cam; 2. To keep the valve fully raised through next 30°; 3. To lower the valve during next 60°; and 4. To keep the valve closed during rest of the revolution i.e. 150° The displacement of the follower being raised and lowered, is to take place with simple harmonic motion Determine: 1. The required time for each interval? 2. Draw the displacement against time, diagrams for one complete revolution of the cam.

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

See similar textbooks

Similar questions

4. Design a cam to raise a valve with simple harmonic motion through 50 mm in 1/3 of a revolution, keep if fully raised through 1/12 revolution and to lower it with harmonic motion in 1/6 revolution. The valve remains closed during the rest of the revolution. The diameter of the roller is 20 mm and the minimum radius of the cam is 25 mm. The diameter of the camshaft is 25 mm. The axis of the valve rod passes through the axis of the camshaft. If the camshaft rotates at uniform speed of 100 r.p.m. ; find the maximum velocity and acceleration of a valve during raising and lowering. [ Ans. 0.39 m/s, 0.78 m/s : 6.17 m/s?, 24.67 m/s]
Design a cam to raise a valve with simple harmonic motion through 50 mm in 1/3 of a revolution,keep if fully raised through 1/12 revolution and to lower it with harmonic motion in 1/6 revolution.The valve remains closed during the rest of the revolution. The diameter of the roller is 20 mm andthe minimum radius of the cam is 25 mm. The diameter of the camshaft is 25 mm. The axis of thevalve rod passes through the axis of the camshaft. If the camshaft rotates at uniform speed of 100r.p.m. ; find the maximum velocity and acceleration of a valve during raising and lowering.
Q6/ Draw the displacement diagram of a cam operating a knife-edge follower when the axis of the follower passes through the axis of cam shaft from the following data: (a) Follower to move outwards through 50 mm during 160° of cam rotation, (b) Follower dwell for the next 30°, (c) Follower to return to its original position during next 120° (d) Follower to dwell for the rest of the cam rotation. The displacement of the follower is to take place with uniform acceleration motion during the outward strokes and with simple harmonic motion during the return strokes. (Note: Use 8 divisions).
A disc cam is to give uniform motion to a knife edge follower during out stroke of 50 mm during the first half of the cam revolution. The follower again returns to it's original position with uniform motion during the next half of the revolution. The minimum radius of the cam is 50 mm and the diameter of the cam shaft is 35 mm. 1.Draw the fully defined displacement diagram of the follower. 2.Draw the profile of the cam when the axis of the follower passes through the axis of the cam shaft.
P A cam drive is used for a mechanism that moves a tool in an automated screw machining process. The cam follower must rise outward 24 mm with harmonic motion in 0.2 s, dwell for 0.3 s, fall 10 mm with harmonic motion in 0.3 s, dwell for 0.2 s, fall 14 mm with harmonic motion in 0.2 s, and then repeat the se- quence. Determine the required speed of the cam and graphically plot a follower displacement diagram.
A cam have the following specifications: Follower to move outward through 5 cm during 90° of cam rotation, it dwells for the next 60°. The follower then return to its original position through an angle 0R and then dwell for the rest of the cam rotation of 110°. The displacement of the follower is to take place with constant speed motion during both the outward and return strokes. The least radius of the cam is 4 cm. If the cam rotates at 300 r.p.m., construct the displacement, velocity and acceleration diagrams. Also determine The displacement, velocity, acceleration and the pressure angle for the following angles (40°, 75°, 145°, 200°).
A cam rotating clockwise with a uniform speed is to give the roller follower of 20 mm diameter with the following motion : (a) Follower to move outwards through a distance of 30 mm during 120° of cam rotation; (b) Follower to dwell for 60° of cam rotation ; (c) Follower to return to its initial position during 90° of cam rotation ; and (d) Follower to dwell for the remaining 90° of cam rotation.
A cam, with a minimum radius of 30 mm, rotating clockwise at a uniform speed is to be designed to give a roller follower, at the end of a valve rod, motion described below : To raise the valve through 60 mm during 150° rotation of the cam;To keep the valve fully raised through next 30° (Dwell);To lower the valve during next 90°; and To keep the valve closed during rest of the revolution i.e. 90° (Dwell); The diameter of the roller is 20 mm and the diameter of the cam shaft is 30 mm. Draw the displacement, the velocity and the acceleration diagrams for one complete revolution of the cam when the cam shaft rotates at 180 r.p.m. Draw the cam profile when the line of the stroke is offset 20 mm from the axis of the cam shaft. The displacement of the valve, while being raised is to take place with simple harmonic motion and lowered with uniform acceleration.
Draw the displacement diagram and profile of the cam operating a roller reciprocating follower and with the following data: Shaft diameter 10 mm; Minimum radius of cam 25mm; lift = 40mm; roller diameter=15mm. The cam lifts the follower for 120° with Simple Harmonic Motion (SHM) followed by a Dwell of 30° .Then follower lowers down during 150° of cam rotation with SHM followed by a Dwell period. If the cam rotates at a uniform speed of 100 RPM clockwise direction. Calculate the maximum velocity and acceleration during the ascent and descent period. Maximum Velocity and Acceleration During Ascent and Descent
The image below depicts one section of a cam shaft which opens a valve to release the pressure in the combustion chamber. In order to synchronize the position of the piston and the release of the valve, there is a sensor that measures the position of the camshaft. The sensor can determine when point a is 0.672 in. to the right of the center of the camshaft and 0.672 in. above the center of the camshaft. In a four stroke engine the crank shaft, which is connected to the pistons, turns twice for every turn of the camshaft. At cruising speed the crank shaft turns at 3,000 rotations per minute (rpm) which means that the camshaft turns at 1,500 rpm or 25 revolutions per second (rps). After 0.825 seconds, where would point a be in relation to the center of the camshaft?* Answer options are: (-0.589,0),(0.116, -0.316), (0,-0.95),(0.86,-0.315),(0.431,0), none of these are correct. Please be sure to show your steps.
Q1:- The circular arc cam rotates uniformly at 600 rpm and operates a flat-footed reciprocating follower. The base circle radius= 24 mm, the nose circle radius= 3 mm, the center distance between the base and nose circles = 30 mm and the distance between the pitch circle center to the center of curvature of the circular flank= 120 mm. The follower retaining spring is to be designed so that at the beginning of the nose, the spring force is 10% greater than the value required to hold the follower on the cam, and in the full lift position, the spring force is 5% greater than the required value. Find the spring stiffness and the spring force at the zero lift position if the total mass o the reciprocating parts is 1.25 kg.
A cam drive is required for a shaker platform. This platform is used to test the shipping-worthiness of packaged items. The cam follower must rise outward 1.0 in. with contant acceleration in 0.7 sec, dwell for 0.2 sec, fall with constant acceleration in 0.5 sec, and then repeat the sequence. Determine the following for the given problems: 1. Calculate the time for a full cycle 2. Calculate the required rotational speed of the cam 3. Determine the cam rotation for each follower motion interval 4. Plot the displacement diagram