CAM AND FOLLOWER MECHANISM.pptx

cam-follower mechanism

1. CAM AND FOLLOWER MECHANISM

2. A cam is a rotating element that gives oscillating or reciprocating motion to the follower which is another element of this machine by direct contact.  This part is mainly used to transform the motion from rotary into linear and vice-versa. What is Cam?

3. Disk or Plate cam Cylindrical cam Translating cam Wedge cam Spiral cam Heart-shaped cam Spherical Cam Types of Cam

4. A disk or plate cam is a mechanical component used in various machines to convert rotational motion into linear motion. It is essentially a circular plate with an off-center groove cut into its surface, which is connected to a sliding follower. As the cam rotates, the follower moves in and out of the groove, causing linear motion in a connected component. Disk or Plate Cam

5. A cylindrical cam is a mechanical component used in machinery to convert rotary motion into linear motion or vice versa . It is a type of cam in which the cam surface is a cylinder . Cylindrical cams are commonly used in engines, textile machinery, and other industrial equipment. Cylindrical Cam

6. This mechanism involves the use of a cam, which is a rotating component that has an irregular shape, and a follower, which is a component that moves along the surface of the cam . The Translating Cam is made out of a groove or contour plate with an oscillating follower in front of it. The movement of the follower is specified by the groove or contour plate. Translating Cam

7. The wedge cam has a translation motion, which has a shape of wedge, but the follower that paired with Wedge Cam can oscillate or translate. Wedge Cam

8. A Spiral Cam is one of the types of cams, mostly used in computer applications. These   spiral grooves  contain teeth that make contact with a  pin gear follower . Spiral Cam

9. The Heart-Shaped Cam appears to be  asymmetrical . It is mostly used to turn a shaft in order to retain a cam in a predetermined position by applying pressure from a roller. Heart-shaped Cam

10. Spherical Cam is another main types of cams mechanism which provide less back-lash and less friction loss. Spherical Cam

11. Globoidal Cam

12. A follower is a rotating or an oscillating element of a machine that follows the motion of cam by direct contact. What is a Follower ?

13. Knife edge follower Roller follower Flat-faced follower Spherical follower Offset Follower Radial Follower Types of Follower

14. Trace Point Base Circle Pitch Curve Prime Circle Cam Profile Pressure Angle Pitch Point Pitch Circle C a m Terminology

15. Base Circle- Base circle is the smallest circle that can be drawn tangentially to cam profile with center at cam profile. The size of cam is descided by the BASE CIRCLE.

16. Trace Point: It is theoretical point on the follower.It is different for different type of follower. For ex. Trace point of knife edge follower is at the point of contact of follower and cam. In case of roller follower it is at the center of roller.

17. Pitch Curve: In order to draw pitch curve we use the principal of inversion. Now for drawing pitch curve hold the cam fixed and rotate the follower then the curve obtained passing through the locus of trace point is called pitch curve.

18. Pressure Angle: In order to determine the pressure angle. Consider any point on the pitch curve note the direction of follower at that point also draw a tangent to pitch curve passing through that point. Now draw a prpendicular line passing through that point. Therefore the angle formed between the followe movement and normal to pitch curve is called  pressure angle. Pressure angle varies from point to point.And attain maximum and minimum value.

19. Pitch point: It is point corresponding to maximum  pressure angle. Pitch circle: Pitch circle is circle drawn taking center as center of base circle and its radius is equal to the distance between the pitch point and base circle center.