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Faculty of Engineering & Technology SRM University, Kattankulathur - 603203

Departnlent of Mechanical Engineering COURSE PLAN

Course Code : ME0208 Date: 09 Dec 2013 Course Title : MACHINES AND MECHANISMS Semester : 4 Academic Year /: (Dec - May) 2013-14/EVEN semester Semester

Section Details: Sec Class Name Room No Signatures

Room No ! ----Mr.D.Raja NIEB205 l}-!VV Mr.M.Sachidhanandam J\1EB 305 f}t?:"" 1// ~l.1'1 .U'

Mr.V.Ragavendia Rao J\1EDIOIB V,~!.tID

Direct Assessment Details: Name of Assessment Marks Topics Tentative date Duration Cycle Test - I 10 Mechanisms

-upto Velocity and Acceleration Diagram

07.02.14 100 minutes

Surprise Test 05 Any topics in basics of mechanisms

17.2.14 15 min

Cycle Test - II 10 Advanced Mechanisms and Friction

10.03.14 100 minutes

Model Examination 20 Full Syllabus 17.04.14 3 hours End semester Examination

50 Full Syllabus 08.04.14 3 hours

Attendance 05 - - -

C ME0208

L T P 4

Prerequisite Nil

Student outcomes

MACHINES AND MECHANISMS 3 2 0

Program Educational Objectives

The main objective of the B.Tech in Mechanical Engineering Program is to provide a periodically-updated curriculum so that, following the completion of the program and with a few years of experience, our alumni will have the expertise to: 1. Practice 2. Enhance 3. Solve 4. Work in large mechanical professional industrial, cross-functional engineering in practice to meet social, and teams and pursue different the global environmental life-long learning. disciplines towards standards with problems with system design, ethical and social appropriate realization, and responsibility. techniques and manufacturing. tools. tools.

(a) an ability to apply X X knowledge of mathematics, science, and engineering (c) an ability to design a X X X system, component, or process to meet desired needs within realistic constraints such as economic, environmental, social, political, ethical, health and safety, manufacturability, and sustainabilitv (e) an ability to identify, X X formulate, and solve engineering problems

Course designed by Department of Mechanical Engineering 1 Student outcome a b c d e f 2 h i j K

x x x

2 Category GENERAL BASIC ENGINEERING PROFESSIONAL (G) SCIENCES SCIENCES AND SUBJECTS

(B) TECHNICAL ART (P) (E)

X

3 Broad area Manufacturing Design Thermal Genaral (for professional courses only, i.e 'under P'

X

category)

4 Course D.RAJA Coordinator

ME0208 - MACHINES AND MECHANISMS

PURPOSE To expose the students to learn the fundamentals of various laws governing rigid bodies and its motions.

INSTRUCTIONAL OBJECTIVES 1. Basic mechanisms, velocity and acceleration of simple mechanisms 2. Drawing the profile of carns and its analysis 3. Friction applications, gear train calculations 4. Balancing of machines.

MECHANISMS 11 Introduction - Links - Pairs - Chain - Mechanism - Machine structure - Degrees of freedom - Four bar chains - Terminology and defmition - Planer, Spherical and Spatial Mechanisms - Grashoff's law - Kutzback criterion - Grobler's criterion for plane mechanism. Inversion of mechanisms - Four bar, single slider crank and double slider crank mechanisms - Simple problems - Instantaneous centre - KelUledy's theorem. Velocity and Acceleration of Four bar and single slider crank mechanisms by relative velocity Method.

ADVANCED MECHANISMS AND CAMS 10 Pantograph - Steering gear mechanism - Davis Steering gear - Ackerman steering gear - Hooke's joint Double Hooke's joint. CAMS: Types of carns and followers - Follower motion - Uniform, SHM and cycloidal. Cam terminology Cam profiles construction for roller, flat faced and knife edge follower types - pressure angle.

FRICTION 6 Friction: Applications - Screw friction - Effort calculations -Efficiency- Self locking and overhauling of screws. Friction clutches - disc, cone clutches - Working principle - Torque, Power transmitted derivations and calculations.

GEAR TRAINS AND CONTROL MECHANISMS 9 Spur gear terminology and definition - Gear trains: simple, compound, reverted and epicyclic - Velocity ratio and torque calculation in gear trains - Automobile differential. Gyroscopes: Gyroscopic forces and couple - Forces on bearing due to gyroscopic action - Gyroscopic effect in ship, motor cycle, car and aircraft. Concept of governors: (elementary treatment only)

TURNING MOMENT DIAGRAM AND BALANCING 9 Turning moment diagrams: Fly wheels - Application offlywheel- Punching presses. Static and dynamic Balancing: Balancing of rotating masses - Balancing of single cylinder engine - Balancing of multi cylinder engine - Balancing machines.

TUTORIAL 30 TOTAL 75

TEXTBOOKS 1. Ratan, S.S., Theory ofMachines, Tata McGraw Hill Publishing company Ltd., 2 od Edition ,2005 2. Thomas Bevan, Theory ofMachines, CBS Publishers and Distributors, 3'd Edition, 1984.

REFERENCE BOOKS 1. Shigley, J. E., and Uicker, J. J., Theory ofMachines and Mechanisms, McGraw Hill, 1995. 2. Ghosh, A., and Mallick, A. K., Theory of Mechanisms and Machines, Affiliated East-West Pvt Ltd.,

New Delhi, 1988. Rao, J. S., and Dukkipati, R.V., Mechanism and Machine Theory, Wiley-Eastern Ltd., New Delhi, 1995.

LESSON PLAN: ME0208 - MACHINES AND MECHANISMS (common for all 3 sections)

YEAR / SEM: II Year -IV Sem. SEMESTER: ODD / EVEN YEAR: 2013-14

S. No.

Date Hr Title Ref. Book

Page No.

MECHANISMS 1 Overview about the course T-l C-l 2 3 4

5

Introduction - Types of constrained motion- Classification of kinematic pairs Kinematic chain - simple problems for degrees of freedom Types ofjoints in chain - Numerical problems Mechanism - Number of degrees of freedom for plane mechanism and application of Kutzback's criterion - Grubler's Criterion -Grashaff's law

R-2 C-l

6

7

8

9 10 11 12

13

14

15

Types of Kinematic chains - Four bar chain and quadratic cycle chain - Inversion of Four bar chain Mechanisms (Qualitative approach only) Working principle of Single slider crank chain and inversion of its mechanisms (Qualitative approach only) Working principle of Double slider crank chain and inversion of its Mechanisms (Qualitative approach only) Velocity and acceleration of four bar chain mechanism by relative velocity method Problems in four bar chain mechanism by relative velocity method Velocity and acceleration of Single slider crank mechanism by relative velocity method Problems in Double slider crank mechanism by relative velocity method Velocity and acceleration of crank and slotted lever (Quick return) mechanism by relative velocity method Instantaneous centre method & Kennedy's theorem - calculation of number of instantaneous centers in four bar and single slider crank mechanism Velocity analysis of Four bar chain and single slider crank mechanism- using Instantaneous centre method - Simple Problems

T-l

R-2

C-2, C-3

C-2

ADVANCED MECHANISMS AND CAMS 16

17

18

19

20

21

22

23 24 25 26 27

Pantograph mechanism and Introduction to automobile Steering gear .Davis Steering gear - Derivation of fundamental equation of correct steering - Numerical problems Ackerman steering gear - Derivation of fundamental equation of correct steering -Numerical problems Hooke's joint and Double Hooke's joint - Derivation of angular velocity and angular acceleration for Hooke's joint - Numerical problems on Hook's joint Introduction and Nomenclature of cam - Classification of cam and its follower with its different types of motion Displacement diagram for various follower motions like SHM, uniform velocity, uniform acceleration of deceleration and cycloid motion. Velocity and acceleration analysis for various follower motions like SHM, uniform velocity, uniform acceleration of deceleration and cycloid motion. Construction of cam profile for Knife edge Follower at radial position and offset position Numerical problems in construction of cam profile for Knife edge follower Construction of cam profile for Roller Follower at radial position and offset position Numerical problems in construction of cam profile for Roller follower Construction of cam profile for flat faced Follower at radial position and offset position

T-l

T-l

R-2

C-6

C-7

C-8

FRICTION

28 29

30

Introduction to friction - types, applications and laws of friction Analysis of friction in Screw thread and problems in screw jack Self locking and overhauling conditions of screws-Numerical Problems in screw jack with above conditions

T-l C-8

31

32

33 34

Types and applications of friction clutches - Analysis of single and multi plate disc clutches under uniform pressure and wear Numerical problems in single and multi plate disc clutches under uniform pressure and wear to fInd torque and axial load Analysis of cone clutch - Numerical problem to fmd torque and axial load Tutorial- problems in disc and cone clutch

GEAR TRAINS AND CONTROL MECHANISMS

35 Gears - classification of gears - Nomenclature of gears - Law of gearing - Undercutting and interference of gears

T-1 C-lO

36 Derivation of arc of contact and path of contact of spur gear R-2 C-9 37 Nwnerical problems in spur gear to fmd arc of contact and path of contact

38 Introduction to Gear trains- Types ofgear trains - calculation of speed ratio and gear speeds in simple, compound gear train -Nwnerical problems

T-l C-ll

39 calculation of speed ratio and gear speeds in reverted gear train - Numerical problems R-2 C-9

40 Speed and nwnber of teeth calculation in simple epicyclic gear train like reverted epicyclic (Tabular method only) - Numerical problems

41 Speed and nwnber ofteetb calculation in compound epicyclic gear train like sun and planet gear (Tabular method only) - Numerical problems

42 Nwnerical Problems in compound epicyclic gear train like sun and planet gear (Tabular method only)

43 Torque calculation in epicyclic gear trains (Tabular method only) - Numerical problems 44 Automobile Differentials (Qualitative approach only)

45 Introduction to gyroscope -gyroscopic couple and moment with precision axis of spin -Forces on bearing due to gyroscopic action

T-1 C-17

46 Gyroscopic effect on Aeroplanes - Numerical problems R-2 C-lO 47 Gyroscopic effect on Naval Ships - Numerical problems

48 Gyroscopic effect on Four wheelers - Derive the stability conditions in automobiles -Numerical problems

49 Gyroscopic effect on two wheelers - Derivation of the stability conditions for automobiles - Numerical problems

50 Introduction to Governor and its types - Working principle (Elementary treatment only) T-l R-2

C16 C-6

TURNING MOMENT DIAGRAM AND BALANCING

51 Introduction and working principle of flywheel - Turning moment diagram for flywheel in 4-Stroke IC engine

T-1 C-13

52 Numerical problems in Turning moment diagram of flywheel using Intercepted areas 53 Numerical problems in Turning moment diagram of flywheel using Curve equation 54 Numerical problems in Turning moment diagram of flywheel using energy method 55 Introduction to Punching press - Numerical problems

56 Balancing - Conditions & Balancing of several masses in same plane (Analytical and Graphical method)

T-l R-2

C-14 C-7

57 Balancing of several rotating masses in different planes -force and couple polygon construction (Graphical method only)

58 Nwnerical problems in Balancing of several rotating masses in different planes 59 Nwnerical problems in Balancing of several rotating masses in different planes 60 Balancing Machines - Static and Dynamic (Qualitative approach only)

Narne of the Faculties: Sections SiW1atu~s

Mr.D.Raja <Q~~(" Mr.M.Sachidhanandam (}1/Z,L.I fJtr1A/L~)

--" Mr.V.Ragavendra Rao V-" ')~(1 r\UQJ JU

'"

~~~\P Course

t,/loordinator HO~Av.echanical

(D.RAJA) ·r

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