Mechanical Engineering(4th Sem.)
KINEMATICS OF MACHINES__________________________________1. Unit-1
2. Unit-2
3. Unit-3
4. Unit-4
5. Unit-5
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KINEMATICS OF MACHINES SyllabusUNIT- I
Relative Velocity Elements, pairs, mechanisms, four bar chain and its inversions, velocity diagrams, Relative velocity method, instantaneous center method. UNIT- II Relative Acceleration Synthesis of Mechanism, pantograph, lower pair mechanisms, relative acceleration diagram, Klien’s construction, Coroilis Component of acceleration. UNIT - III Cams: Classification of cams and followers, nomenclature of a radial cam, description of follower movement, displacement diagrams, uniform and modified uniform motion, simple harmonic motion, uniform acceleration motion and its modifications, cycloidal motion, synthesis of cam profile by graphical approach, considerations of pressure angle, cams with specified contours: circular arc cam & tangent cam. UNIT- IV Gear and gear trains Gear terminology, law of gearing, gear tooth forms, standard involute and cycloid tooth profile, interference and undercutting of involute teeth, minimum number of teeth on pinion to avoid interference, types of gears Gear trains Simple, compound, reverted, and epicyclical gear trains, tabular/analytical/graphical/vector method for computation of velocity ratio in gear trains UNIT-V Friction Friction in turning pairs, application of friction circles in slider crank and four bar mechanisms; pivot and collar friction, thrust bearings. Brakes and Dynamometers Simple block and shoe brake, band brake, band and block brake, and internal expanding shoe brake; absorption dynamometers, transmission dynamometers. |
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