KINEMATICS OF MACHINERY 3 1 0 4
OBJECTIVE
· To understand the concept of machines, mechanisms and related terminologies.
· To analyse a mechanism for displacement, velocity and acceleration at any point
in
a moving link
· To understand the theory of gears, gear trains and cams
· To understand the role of friction in drives and brakes.
UNIT I BASICS OF MECHANISMS 7(L)
Definitions – Link, Kinematic pair, Kinematic chain, Mechanism, and Machine. -Degree
of Freedom – Mobility - Kutzbach
criterion (Gruebler’s
equation) -Grashoff's law-
Kinematic Inversions of four-bar chain and slider crank chain - Mechanical Advantage- Transmission angle.
Description of
common
Mechanisms - Offset slider mechanism as
quick return
mechanisms, Pantograph, Straight line generators (Peaucellier and Watt mechanisms), Steering gear for automobile,
Hooke’s
joint, Toggle mechanism, Ratchets and escapements -
Indexing Mechanisms.
UNIT II KINEMATIC ANALYSIS 10(L)+5(T)
Analysis of simple mechanisms (Single slider crank mechanism and four bar mechanism) - Graphical Methods for displacement, velocity and acceleration; Shaping machine mechanism - Coincident points – Coriolis acceleration - Analytical method of analysis of slider crank mechanism and four bar mechanism. Approximate analytical
expression for displacement, velocity and acceleration of piston of reciprocating engine mechanism.
UNIT III KINEMATICS OF CAMS
