1 1 2
175% +
1. A disc cam is to give uniform motion to a knife edge follower during out StOKOLJUM Ouring the
first half of the cam revolution. The follower again returns to its 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 car shaft is
35 mm. Draw the profile of the cam when 1. the axis of follower passes through the axis of cam shaſt, and 2. the
axis of follower is offset by 20 mm from the axis of the cam shaft.
2. A cam operating a knife-edged follower has the following data :
(a) Follower moves outwards through 40 mm during 60° of cam rotation.
(6) Follower dwells for the next 45°.
(c) Follower returns to its original position during next 90°.
(d) Follower dwells for the rest of the rotation.
The displacement of the follower is to take place with simple harmonic motion during both the outward
and return strokes. The least radius of the cam is 50 mm. Draw the profile of the cam when 1. the axis of the
follower passes through the cam axis, and 2. the axis of the follower is offset 20 mm towards right from the cam
axis. If the cam rotates at 300 r.p.m., determine maximum velocity and acceleration of the follower during the
outward stroke and the return stroke.
[Ans. 1.88 m/s, 1.26 m/s ; 177.7 m/s2, 79 m/s
clockwise direction is used to move a reciprocating roller with simple harnonic
Answers
Answer:
1,
Disc cam with reciprocating follower having knife edge, roller follower, ... As the cam turns, driven by the circular motion, the cam follower ... To lower the valve during next 60º and. 4.
2.. A cam operating a knife-edged follower has the following data :
(a) Follower moves outwards through 40 mm during 60° of cam rotation.
(b) Follower dwells for the next 45°.
(c) Follower returns to its original position during next 90°.
(d) Follower dwells for the rest of the rotation.
The displacement of the follower is to take place with simple harmonic motion during both the outward and return strokes. The least radius of the cam is 50 mm. Draw the profile of the cam when 1. the axis of the follower passes through the cam axis, and 2. the axis of the follower is offset 20 mm towards right from the cam axis. If the cam rotates at 300 r.p.m., determine maximum velocity and acceleration of the follower during the outward stroke and the return stroke.
Explanation: