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KINEMATICS OF MACHINERY -Srikanth Rangdal

Objective:

The Subject aims at introducing an Engineering Student with the concept of designing machines

without any consideration of forces acting. It requires a high Visualization Skills of Geometry in Motion & is a

key to the accurate operation of any Machine as it determines the geometric structure required for the

Machine to fulfill the task it is meant for.

Session Plan:

S

No Topics / Sub Topics

Periods

Expected

Text Books/

References

1. Introduction to Kinematics & Machines 1 T2, T3

Unit 1: Machine – Parts, Construction & Types

Objectives :

To Introduce the Terminology Used for Basic Parts Which Make Up a

Machine & Understand the Different Types of These Parts

Skills Required/Honed:

Memory, Simple Calculations

Simple Geometry & Drawing Ability

2. Types of Elements/Links, Joints, Kinematic Chain, Mechanisms & Machines 1 T2, T3

3. Classification – Higher/Lower, Closed/Open, Sliding, Turning, Rolling, Screw & Spherical 2 T2, T3

4. DOF & Constraints – Completely, Partially / Successfully & Incompletely,

Grubblers Equation, Kurtzbach Equation & Contradictions 2 T2, T3

5. Inversions of Quadric Cycle – Crank Rocker, Double Crank, Double Rocker 1 T2, T3

6. Inversions of Double Slider Crank Chain – Scotch-Yoke, Oldham Coupling, Trammels 2 T2, T3

Total 8

Unit 2: Copiers & Straight Line Mechanisms

Objectives :

To Study Some Examples of Straight Line

Mechanisms

Skills Required/Honed:

Theoretical Understanding, Normal Descriptive Skill

Exceptional Visualization & Better Drawing Ability,

7. Exact & Approximate Copiers & Generated Types 1 T2, T3

8. Straight Line Mechanisms – Scott-Russel, Watt, Robert, Grasshopper, Tchebicheff 3 T2, T3

9. Peaucellier, Hart Mechanisms with Proof 2 T2, T3

10. Pantograph 1 T2, T3

Total 7

Unit 3: Position, Velocity & Acceleration

Objectives :

To Understand the Motion of Some Mechanisms & Understand

Different Methods Used to Find Velocity & Acceleration In Them.

Skills Required/Honed:

Excellent Geometry & Drawing Skills

Algebra, Trigonometry.

11. Instantaneous Center of Rotation, Centrods & Axodes, Position & Velocity Diagrams 1 T2, T3

12. Determination of Angular Velocity of Points & Links. 1 T2, T3

13. Analysis – Relative Velocity Method – 4 Bar & Slider Crank Mechanisms. 2 T2, T3

14. Analysis – Acceleration – 4 Bar & Slider Crank Mechanisms 2

15. Analysis of other Mechanisms (Velocity & Acceleration) 1 T2, T3

16. Relative Motion Between Two Bodies – 3 Centers in Line Theorem 1 T2, T3

17. Kleins Construction, Coriolis Acceleration 2 T2, T3

Total 10

Unit 4: Steerings & Couplings

Objectives :

To Study Operation of Steering with Some Types of

Gears & Transmission of Motion In Joints & Couplings

Skills Required/Honed:

Better Understanding of Geometry &

Better Drawing Ability, Normal Description Skill

18. Conditions for Correct Steering – Davis Steering Gear 1 T2, T3

19. Ackerman’s Steering Gear – Velocity Ratio 2 T2, T3

20. Hooke’s Joint – Single & Double 2 T2, T3

21. Universal Coupling – Application – Problems. 2 T2, T3

Total 7

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Unit 5: Cams & Followers

Objectives :

To Study Analysis & Synthesis of Cams for

Various Conditions.

Skills Required/Honed:

Better Understanding of Geometry &

Advanced Drawing Ability.

22. Cams & Followers – Definition, Uses, Types, Terminology, Types of Motion, 1 T2, T3

23. Uniform Velocity, Simple Harmonic Motion & Uniform Acceleration, 2 T2, T3

24. Max Velocity & Acceleration During Outward & Return Strokes In Above 3 Cases 2 T2, T3

25. Analysis of Followers – Roller– Circular Cam with Straight Concave & Convex Flanks 2 T2, T3

Total 7

Unit 6: Higher Pairs

Objectives :

To Study Higher Pairs with Gear as the Main

Example

Skills Required/Honed:

Better Understanding of Geometry &

Better Drawing Ability, Normal Description Skill

26. Higher Pairs, Friction Wheels & Toothed Gears – Types, Law of Gearing, 2 T2, T3

27. Condition for Constant Velocity Ratio for Transmission of Motion, Form of Teeth 1 T2, T3

28. Cycloidal & Involute Profiles. Velocity of Sliding 2 T2, T3

29. Phenomenon of Interferences – Types, Arc of Contact & Path of Contact 1 T2, T3

30. Introduction to Helical, Bevel & Worm Gearing 1 T2, T3

Total 7

Unit 7: Transmission of Motion

Objectives :

To Study Belt & Chain Transmission

Skills Required/Honed:

Theoretical Understanding, Minimum Drawing Ability,

Understanding of Simple Geometry.

31. Belt Rope & Chan Drives – Introduction, Selection, Types, Material Used 1 T2, T3

32. Velocity Ratio, Slip of Belt, Creep 1 T2, T3

33. Tensions for Flat Belt Drive, Angle of Contact, Centrifugal Tension, 2 T2, T3

34. Maximum Tension of Belt, Chains – Length, 2 T2, T3

35. Angular Speed Ratio, Classification of Chains 1 T2, T3

Total 7

Unit 8: Gear Trains

Objectives :

To Study Different Types of Gear Trains.

Skills Required/Honed:

Theoretical Understanding, Good Drawing Ability,

Understanding of Simple Geometry.

36. Gear Trains – Introduction – Train Value, 1 T2, T3

37. Types – Simple & Reverted Wheel Train 1 T2, T3

38. Epicyclic Gear Trains, Methods of Finding Train Value or Velocity Ratio 3 T2, T3

39. Selection of Gear Box, Differential Gear for An Automobile 2 T2, T3

Total 7

Cumulative Total 61

Text books:

T1: “Theory of Machines” – T. Beven, CBS

T2: “Theory of Machines” – R L Norton – Tata McGraw Hill

T3: “Theory of Machines” – R S Khurmi & J K Gupta – S.Chand Publication

Reference books

R1: “Theory of Machines” – SS Rattan, McGraw Hill

R2: “Theory of Machines” – D S Kumar

Websites:

YouTube.com can be searched for the relevant videos of working Mechanisms/Machines.

www.academicearth.com – Avery informative website with videos of eminent Professors at MIT

explaining Mechanics related topics.