Classification of Followers
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This document classifies followers based on their surface contact, motion, and path of motion. Regarding surface contact, followers can have a knife edge, roller, flat face, or spherical shape at the contacting end. Followers are also classified based on whether they reciprocate as the cam rotates uniformly or convert the cam's rotary motion into oscillation. Finally, followers' path of motion is classified as either along the cam's central axis or offset from that axis.
Classification of Followers
- 1. MEM 405 GD TOPIC CLASSIFICATION OF FOLLOWERS PRESENTED BY : NEERAJ GAUTAM ROLL NO. 144152
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- 4. 1. According to the surface in contact : a. – When the contacting end of the follower has a sharp knife edge. Sliding motion is there between contacting surfaces. A side thrust exists between follower and the guide. Used - Less used in practice because of excessive wear due to small area of contact. b. – When the contacting end of the follower is a roller. Rolling motion is there between contacting surfaces. Rate of wear is less due to roller contact. A side thrust exists between follower and the guide. Used – where more space is available e.g. Gas & oil engines and aircraft engines.
- 5. c. – When the contacting end of the follower is a perfectly flat faced. Sliding motion is there between contacting surfaces. Side thrust between follower and the guide is reduced and side thrust due to friction is only there. Wear can be reduced by offsetting the axis of follower. When flat faced follower is circular then it is called Mushroom Follower. Used – where space is limited e.g. with valves of automobile engine. d. – When contacting end of follower is of spherical shape. • Modified form of flat faced follower. • Used – in automobile engines with valves.
- 7. 2. According to the motion of the follower : a. – When the follower reciprocates in guides as the cam rotates uniformly. b. – When the uniform rotary motion of cam is converted into predetermined oscillatory motion of follower.
- 8. 3. According to the path of motion of the follower : a. – When the motion of the follower is along an axis passing through the center of the cam. b. – When the motion of the follower is along an axis away from the axis of the center of the cam.