ME3491 Theory of machines

                                                            


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Important questions 
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UNIT-1

1.kinematics inversions of 4 bar and slide crank chain

2.derivatives of followers motion,kinematics analysis in simple mechanisms

3.computer approach,displacement diagrams

UNIT-2,3

1.Interchangeable gears

2.automotive transmission gear trains,parallel axis gears trains

3.Interchangeable gears

4.Friction drives ,screw threads, clutches

5.Friction in vehicle propulsion and braking.**

UNIT-4

1.Inertia Forces and Inertia Torque

2.static Equilibrium conditions

3.superposition principle, Free body diagrams

UNIT-5

1.Vibration isolation.(gyroscopic principles)

2Forced , torsional,damped vibration

3.Equations of motion,Static and Dynamic balancing

**Very important questions are bolded and may be asked based on this topic

PART-C

1.Compulsory Questions {a case study where the student will have to read and analyse the subject }
mostly asked from unit 2, 5(OR) a situation given and you have to answer on your own

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SYllabuS
UNIT I KINEMATICS OF MECHANISMS

Mechanisms – Terminology and definitions – kinematics inversions of 4 bar and slide crank chain – kinematics analysis in simple mechanisms – velocity and acceleration polygons– Analytical methods – computer approach – cams – classifications – displacement diagrams – layout of plate cam profiles – derivatives of followers motion – circular arc and tangent cams. UNIT II GEARS AND GEAR TRAIN Spur gear – law of toothed gearing – involute gearing – Interchangeable gears – Gear tooth action interference and undercutting – nonstandard teeth – gear trains – parallel axis gears trains – epicyclic gear trains – automotive transmission gear trains. UNIT III FRICTION IN MACHINE ELEMENTS Surface contacts – Sliding and Rolling friction – Friction drives – Friction in screw threads – Bearings and lubrication – Friction clutches – Belt and rope drives – Friction aspects in brakes– Friction in vehicle propulsion and braking. UNIT IV FORCE ANALYSIS Applied and Constrained Forces – Free body diagrams – static Equilibrium conditions – Two, Three and four members – Static Force analysis in simple machine members – Dynamic Force Analysis – Inertia Forces and Inertia Torque – D’Alembert’s principle – superposition principle – dynamic Force Analysis in simple machine members UNIT V BALANCING AND VIBRATION Static and Dynamic balancing – Balancing of revolving and reciprocating masses – Balancing machines – free vibrations – Equations of motion – natural Frequency – Damped Vibration – bending critical speed of simple shaft – Torsional vibration – Forced vibration – harmonic Forcing – Vibration isolation.(gyroscopic principles)

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