Parul Institute of Engineering
& Technology
Subject Code
: 2131906
Name of Subject : KINEMATICS OF MACHINES
Name of Unit
: Cams and Followers
Topic
: Classifications of cam and follower with its applications
Name of Faculty : Bhavin Patel
Name of Students: TALAVIYA TUSHAR C. (130370119353)
BHATT TANAY D.
(130370119354)
TANDEL VONKET R.
(130370119355)
TANDLEKAR SHUBHAM K.(130370119356)
Sub:-EG
Topic:- Sectional Orthographic view
Definition of Cam
• A cam is a rotating machine
element which gives
reciprocating or oscillating
motion to another element
known as follower.
• The cam and the follower have
a line contact and constitute a
higher pair.
• Three elements :
– Driver member – CAM
– Driven member – Follower
– Frame – to support the cam
and guide the follower
• Application :
– Internal combustion engine for operating valve
– Shoe making machines
– Sawing machine
– Punch press
– Paper cutting machine
– Fuel pump diesel engine
Classification of Cams
•
•
1.
2.
3.
Three types :
According to
Shape
Follower movement
Manner of constraint of follower
Wedge cam
• Wedge has translation movement
• Follower can translate or oscillate
• Spring is used to maintain the
contact between cam and follower
Radial or Disc cam
Cam with knife edge
follower
Cam with spherical
faced follower
In radial cams, the follower reciprocates or oscillates
in a direction perpendicular to the cam axis.
Cylindrical cam
Cylindrical cam with
reciprocating follower
Cylindrical cam with
oscillating follower
In cylindrical cams, the follower reciprocates or
oscillates in a direction parallel to the cams axis.
Globoidal cam
Spiral cam
Groove is cut in the form of
spiral which guides the follower
Spherical cam
Follower oscillates about axis perpendicular to the
axis of rotation of cam.
According to manner of constraint of
follower
1. Pre-loaded spring cam
Compression spring is used
to maintain the contact
between cam and follower.
According to manner of constraint of
follower
continue…
2. Positive drive cam
Contact between cam and follower is maintained by roller
follower which operates in groove of cam.
According to manner of constraint of
follower
continue…
3. Gravity cam
Contact between the cam and follower is maintained due to the gravity or
own weight of the follower.
Classification of Followers
1. According to Shape
2. According to the motion of the follower.
3. According to the path of motion of the follower
According to Shape
According to Shape
Continue….
According To The Motion Of The
Follower
Oscillating Follower
Reciprocating Follower
According To The Path Of Motion Of
The Follower
Radial Follower
Offset Follower
Motion of the follower
As the cam rotates the follower moves upward and downward.
• The upward movement of follower is called rise (Outstroke)
• The downward movement is called fall (Return stroke).
• When the follower is not moving upward and downward even
when the cam rotates, it is called dwell.
Wedge cam
Knife Edge Follower
Flat Faced Follower
Roller Follower
Cylindrical Cam
End Cam
It is similar to cylindrical cam in
which follower makes contact at
periphery of cam.
Example
Example