Kinematics and Dynamics of Machines | Cams and Followers by Pavan | Learn Smarter
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Cams and Followers

The chapter covers the fundamentals of cams and followers, detailing various types of cam mechanisms and their classifications. It outlines critical cam terminology, motion diagrams, and synthesis methods, emphasizing the importance of understanding displacement profiles. Concepts like pressure angle and undercutting in cam design are also addressed to ensure effective force transmission.

Sections

  • 1

    Introduction And Classification

    This section introduces cams as rotating machine elements that convert rotary motion into specific follower motions and categorizes various types of cams and followers.

  • 1.1

    Types Of Cams

    This section introduces the various types of cams used in mechanical design, highlighting their roles and characteristics.

  • 1.2

    Types Of Followers

    This section discusses the different types of followers in cam mechanisms, outlining their characteristics and motion profiles.

  • 1.3

    Follower Motion Types

    Follower motion types describe the ways in which followers receive motion from cams, influencing their operation in machinery.

  • 2

    Cam Terminology

    This section covers essential terminology used in cam design, outlining critical components and concepts related to cam mechanics.

  • 2.1

    Key Terms Used In Cam Design

    This section outlines essential terminology used in cam design, focusing on various key components and concepts.

  • 3

    Motion Diagrams

    This section discusses the various standard displacement profiles used to design follower motion in cam and follower mechanisms, including uniform velocity, parabolic motion, simple harmonic motion, and cycloidal motion.

  • 3.1

    Uniform Velocity (Uv)

    This section introduces the concept of uniform velocity in cam mechanisms, explaining its characteristics and implications in motion diagrams.

  • 3.2

    Parabolic Motion

    Parabolic motion describes the follower's trajectory in cam design, specifically focusing on constant acceleration and deceleration phases while avoiding discontinuities.

  • 3.3

    Simple Harmonic Motion (Shm)

    Simple Harmonic Motion (SHM) is a type of periodic motion characterized by a smooth sine wave pattern that describes how an object oscillates around an equilibrium position.

  • 3.4

    Cycloidal Motion

    Cycloidal motion is a smooth follower motion characterized by zero acceleration and jerk at both the beginning and end, making it suitable for applications involving high-speed cams.

  • 4

    Displacement, Velocity, Acceleration & Jerk Diagrams

    This section discusses motion diagrams focusing on displacement, velocity, acceleration, and jerk, elucidating how these factors influence follower motion in cam mechanisms.

  • 5

    Cam Profile Synthesis

    This section discusses methods for synthesizing cam profiles, highlighting both graphical constructions and analytical equations necessary for effective cam design.

  • 5.1

    Cam Profile Generation

    Cam profile generation involves creating specific motion profiles for followers using graphical or analytical methods.

  • 6

    Circular And Tangent Cams

    This section explores Circular and Tangent Cams, highlighting their design characteristics and potential issues.

  • 6.1

    Circular Arc Cams

    Circular arc cams, characterized by profiles built from arcs of circles, are simple to manufacture and help in motion transmission in mechanical systems.

  • 6.2

    Tangent Cams

    This section discusses tangent cams, detailing their structure and behavior compared to other cam types.

  • 7

    Pressure Angle And Undercutting

    This section describes how the pressure angle affects force transmission in cam systems and details the phenomenon of undercutting in cam design.

Class Notes

Memorization

What we have learnt

  • A cam imparts reciprocating...
  • The design of motion diagra...
  • Pressure angles and undercu...

Final Test

Revision Tests