30-11-2012, 05:59 PM
CAMS
CAM.ppt (Size: 3.34 MB / Downloads: 79)
Cam - A mechanical device used to transmit motion to a follower by direct contact.
Cam – driver; Follower - driven
In a cam - follower pair, the cam normally rotates while the follower may translate or oscillate.
Types of follower motion
Follower motion with,
Uniform velocity
Modified uniform velocity
Uniform acceleration and deceleration
Simple harmonic motion
Cycloidal motion
Solved problems
Draw the cam profile for following conditions:
Follower type = Knife edged, in-line; lift = 50mm; base circle radius = 50mm; out stroke with SHM, for 600 cam rotation; dwell for 450 cam rotation; return stroke with SHM, for 900 cam rotation; dwell for the remaining period. Determine max. velocity and acceleration during out stroke and return stroke if the cam rotates at 1000 rpm in clockwise direction.