ME 1502 : MECHANICS OF MACHINERY

Syllabus

Module 1
Introduction : Machines and mechanisms, lower and higher pairs, kinematic chains, kinematic inversions of four bar, slider crank and double slider crank chains, equivalent linkages, Lower pairs - Pantograph, Paucellier mechanism, Thomson indicator mechanism, Watt mechanism, Geneva mechanism, Steering mechanism, Hooke's joint. Kinematic analysis of plane mechanisms: General case of plane motion, Arnold Kennedy’s theorem, velocity analysis using instantaneous center method, velocity and acceleration diagrams, Coriolis component of acceleration

Module II
Spur gear: gear terminology, conjugate gears, involute arc of motion, generation of gear teeth profiles, interference, cycloidal and involute gear characteristics, law of gearing, length of path of contact, length of arc of contact, contact ratio, interchangeable gears, standard and non-standard tooth profiles, description of various types of gears like helical, bevel, worm. Gear Trains: Analysis of simple, compound, reverted and epicyclic gears, solution of epicyclic gear train problems, gear train in differentials.

Module III
Cams: Classification of cams and followers, geometry of radial cams, displacement diagrams, follower motion, uniform velocity, simple harmonic, uniform acceleration and retardation, cycloidal, parabolic, graphical layout of cam profiles, displacement, velocity, acceleration and jerk relations, pressure angle, analysis of tangent cam, convex sided cams with roller follower and flat faced followers.
Friction: Laws of friction, Limiting angle of friction, Flat pivot bearing, Flat collar bearing, Conical pivot bearing, Efficiency of inclined plane, Screw friction, Screw Jack, Torque required to lift and lower the load by screw jack, Efficiency of a screw jack.

Module IV
Friction clutches – Single disc clutch, Multiple disc clutch, Cone clutch, Centrifugal clutch. Dynamometer – Types of dynamometer, Prony brake dynamometer, Rope brake dynamometer, Belt transmission dynamometer, Torsion dynamometer Introduction to synthesis: synthesis of slider crank mechanism, crank and rocker mechanism. Optimum transmission angle, synthesis of four bar links, three and four position synthesis. Overlay method, Coupler curve synthesis, Freudenstein’s equations for Four bar and Slider crank mechanism.

References:
1) Theory of Machines: Rattan, Tata McGraw Hill
2) Theory of Machines and Mechanisms: Ghosh & Mallick, Prentice Hall India
3) Machines & Mechanisms : Myszka, Pearson Education
4) Theory of Machines : Thomas Bevan, Pearson Education
5) Theory of Mechanism & Machines, Sharma & Purohit, PHI
6) Theory of Machines and Mechanics: Uicker, Pennock, and Shigley, Mc Graw Hill
7) Mechanism & Machine Theory:Ashok G.Ambekar,PHI
8) Kinematics & Dynamics of Machinery, Norton, McGraw Hill
9) Kinematics, Dynamics and Design of Machinery, Waldron & Kinzel, Wiley

Type of Questions for University Exam.
Q 1.Eight short answer questions of 5 marks with two questions from each of the four modules. (8x5 = 40 marks)
Q 2. to Q.5 : Two questions A & B of 15 marks from each modules with option to answer either A or B. (4x15 = 60 marks)