Presentation edu740 Micro Teaching one ON CAMS.pptx

CAMS

1. edu740 Micro-Teaching one ON CAMS: NAME: VIKASH PRASAD ID:A00224294

2. LESSON OUTCOMES: By the end of this topic, students will be able to understand: Identify and define the different types of Cams and its followers. Construct the displacement graph and Cam profile for flat and curved follower. Appreciate the use of Cams in everyday life.

3. Introduction What is a cams? A cam produces a simple means to obtain irregular or specified predictable designed motion. These motions would be very difficult to obtain in any other way. As the shaft is rotated the roller follows the irregular surface of the cam, rising or falling according to the profile of the cam. The roller is held tightly against the cam either by gravity or a spring. The cam follower traces the surface of the cam transmitting its motion to the required mechanism.

4. Key Concepts Definitions of dwell, lift/stroke, and pitch curve. Dwell : A period when the follower does not move. Lift/Stroke : The maximum travel of the follower. Pitch Curve : The path traced by the follower as it moves.

5. Types of Cams Different types of cams followers.

6. Flat Followers Explanation of eccentric cams and their operation with flat followers. - Visual diagrams showing the movement of flat followers. Example: Mechanical Toy: M echanical toy using eccentric cams to create movement.

7. Roller Followers Explanation of how roller followers work with cams . In cams there is a point of contact between the two profiles. The force is transmitted along the common normal of the two contacting curves. A curvature characteristic is used for the determination of cam size. -

8. Constructing Displacement Graphs How to construct displacement graphs for flat and curved followers. - Example graph and explanation.

9. Uniform Velocity – lifts or falls which follow a straight line on the graph. The cam shown would give a uniform velocity rise and fall of its follower.

10. Simple Harmonic Motion – sine curve, constructed by projecting points from the semi-circle to the graph lines.

11. Uniform Acceleration and Retardation – drawn by fixing apex, base and midpoints and in the quarters as shown. The curve is drawn the intersections.

12. Everyday Applications of Cams Cam and cam follower mechanisms are often used in mechanical engineering and various machinery, like internal combustion engines, automatic lathe machines, diesel fuel pumps, and other repeating machinery and manufacturing applications.

13. Conclusion: Cams are important parts in machines that help change rotating movement into straight movement. They are used in many devices, from engines to toys, making machines work more efficiently. Understanding cams helps us design better machines. By knowing how they work, we can create more effective and innovative mechanical systems . .

14. Video on what is a cams https:// youtu.be/tzWQasmUfLY?si=qxgjoEcCf4-8WS8z