Cams and Followers in Mechanical Engineering
Explore the world of cams and followers in mechanical engineering through this detailed module. Learn about different types of cams, followers, motion characteristics, classifications, and analysis techniques. Dive into displacement, velocity, acceleration curves, and various cam profiles with engaging visuals.
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Presentation Transcript
Module 5 CAMS and ANALYSIS OF CAMS Pavana, Assistant Professor, SJEC, Mangaluru 1
Module 5 Cams: Types of cams, types of followers. displacement, velocity and acceleration curves for uniform velocity, Simple Harmonic Motion, Uniform Acceleration Retradation, Cycloidal motion. Cam profiles: disc cam with reciprocating / oscillating follower having knife- edge, roller and flat-face follower inline and offset. Analysis of Cams: Analysis of arc cam with flat faced follower. 10 Hours 2
CAMS CAMS 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. 3
CLASSIFICATION OF FOLLOWER 1) According to the surface in contact (a) Knife edge follower (b) Roller follower (c) Flat faced follower (d) Spherical follower 4
3). According to the position of the follower a) Radial (in line) follower 5
a) Offset follower 6
Motions Rise- Cam causes follower to rise Fall - Cam causes follower to fall Dwell - No output motion for a specified period of input motion 7
CLASSIFICATION OF CAMS 1). ACCORDING TO THE TYPE OF FOLLOWER MOTION A). DWELL-RISE-DWELL CAM (D-R-D) 8
2). ACCORDING TO THE TYPE OF FOLLOWER MOTION A). WEDGE OR FLAT CAM 11
A). CYLINDRICAL OR DRUM CAM Pavana, Assistant Professor, SJEC, Mangaluru 13
3). Classification based on constraint A). Spring loaded or pre loaded B). Positive constraints 14
TERMINOLOGY 15
Types of follower motion Types of follower motion Follower motion with, a) Uniform velocity b) Modified uniform velocity c) Uniform acceleration and deceleration d) Simple harmonic motion e) Cycloidal motion 16
Important Formulae: Important Formulae: 17
