ME2203 KINEMATICS OF MACHINERY L T P C
3 1 0 4
· 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
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+5
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 8+3
Classifications - Displacement diagrams - Parabolic, Simple harmonic and Cycloidal motions – Graphical construction of displacement diagrams and layout of plate cam profiles - circular arc and tangent cams - Pressure angle and undercutting.
UNIT IV GEARS 10+4
Classification of gears – Gear tooth terminology - Fundamental Law of toothed gearing and involute gearing – Length of path of contact and contact ratio - Interference and undercutting - Gear trains – Simple, compound and Epicyclic gear trains - Differentials.
UNIT V FRICTION 10+3
Dry friction – Friction in screw jack – Pivot and collar friction - Plate clutches - Belt and rope drives - Block brakes, band brakes.
L= 45 T= 15 TOTAL : 60 PERIODS
1. Ambekar A. G., Mechanism and Machine Theory, Prentice Hall of India, New Delhi,
2. Uicker J.J.,Pennock G.R., Shigley J.E., “Theory of Machines and
Mechanisms”(Indian Edition), Oxford University Press, 2003.
1. Thomas Bevan, “Theory of Machines”, CBS Publishers and Distributors, 1984.
2. Ramamurti,V.,’ Mechanism and Machine Theory”, Second Edition, Narosa
Publishing House, 2005
3. Ghosh A and A.K.Mallick, “Theory of Mechanisms and Machines”, Affiliated East- West Pvt. Ltd., New Delhi, 1998.
4. Rao J.S and Dukkipati R.V, “Mechanism and Machine Theory”, Wiley-Eastern Ltd.,
New Delhi, 199 2.
5. John Hannah and Stephens R.C, “Mechanics of Machines”, Viva Low-Prices Student
BIS CODES OF PRACTICE/USEFUL WEBSITES
1. IS 2458 : 2001, Vocabulary of Gear Terms – Definitions Related to Geometry
2. IS 2467 : 2002 (ISO 701: 1998), International Gear Notation – Symbols for
3. IS 5267 : 2002 Vocabulary of Gear Terms – Definitions Related to Worm Gear
4. IS 5037 : Part 1 : 2004, Straight Bevel Gears for General
Engineering and Heavy Engineering - Part 1: Basic Rack.
5. IS 5037 : Part 2 : 2004, Straight Bevel Gears for General
Engineering and Heavy Engineering - Part 2: Module and Diametral Pitches.