Dynamics of Machinery
102602Module 3: Cams
1(d). For a knife-edge follower, the cam profile is the same as the: (i) Pitch curve (ii) Base circle (iii) Prime circle (iv) Pitch circle.20262m
Module 3: Cams
View this question on its own page →For a knife-edge follower, the cam profile is the same as the: (i) Pitch curve (ii) Base circle (iii) Prime circle (iv) Pitch circle.
1(e). A roller follower is preferred over a knife-edge follower mainly because it: (i) Has higher friction (ii) Reduces wear and friction (iii) Requires no cam (iv) Cannot transmit motion.20262m
Module 3: Cams
View this question on its own page →A roller follower is preferred over a knife-edge follower mainly because it: (i) Has higher friction (ii) Reduces wear and friction (iii) Requires no cam (iv) Cannot transmit motion.
4(a). A cam drives a flat reciprocating follower as follows: during the first 120° rotation of the cam, the follower moves outwards through a distance of 20 mm with simple harmonic motion. The follower dwells during the next 30° of cam rotation. During the next 120° of cam rotation, the follower moves inwards with simple harmonic motion. The follower dwells for the last 90° of cam rotation. The minimum radius of the cam is 25 mm. Draw the profile of the cam.20267m
Module 3: Cams
View this question on its own page →A cam drives a flat reciprocating follower as follows: during the first 120° rotation of the cam, the follower moves outwards through a distance of 20 mm with simple harmonic motion. The follower dwells during the next 30° of cam rotation. During the next 120° of cam rotation, the follower moves inwards with simple harmonic motion. The follower dwells for the last 90° of cam rotation. The minimum radius of the cam is 25 mm. Draw the profile of the cam.
4(b). Draw the displacement, velocity and acceleration diagrams for a follower when it moves with uniform acceleration and retardation. Derive the expressions for velocity and acceleration during outstroke and return stroke.20267m
Module 3: Cams
View this question on its own page →Draw the displacement, velocity and acceleration diagrams for a follower when it moves with uniform acceleration and retardation. Derive the expressions for velocity and acceleration during outstroke and return stroke.