### MECHANICS OF MACHINES | Lectures, Self Study & Quiz | basic mathematics and Applied Science, Engineering Graphics | Diploma

 Course Title: MECHANICS OF MACHINES Scheme (L:T:P) : 4:0:0 Total Contact Hours: 52 Course Code: 15ME32T Type of Course: Lectures, Self Study & Quiz Credit :04 Core/ Elective: Core CIE- 25 Marks                                                                                                    SEE- 100 Marks

Prerequisites: Knowledge of basic mathematics and Applied Science, Engineering Graphics

Course Objectives:

1.     To provide basic concept of kinematics and kinetics of machine elements.

2.     To study basics of power transmission.

3.     To study the effect of friction.

4.     To Study the essentiality of balancing.

5.     To acquaint with working principles of CAM Mechanism.

6.     To study the different types of vibration and to understand critical speed of shaft

Course Outcomes:

On successful completion of the course, the students will be able to attain CO:

 Course Outcome CL Linked PO Teaching Hrs Analyze and Apply the knowledge of these    machines,            mechanisms            and CO1 related terminologies in mechanical engineering   science   in   maintaining sustainable                       environment             and                       its R/U/A/A n 1,2,3,4,5,6 10 10 impact on society CO2 Select appropriate power transmission mechanisms R/U/A 1,2,3,4,5,6 10 11 CO3 Analyze the effect of friction on machine elements U/A/An 1,2,3,4,5,6, 10 10 CO4 Appreciate the essentiality of balancing in Rotating Parts.. U/A 1,2,3,4,5,6 10 07 CO5 Construct CAM profile for the R/U/A 1,2,3,4,5,6 10 specific follower motion 10 CO6 Understand the Terminology and types associated with vibration in machine elements R/U 1,2, 10 04 Total sessions 52

Legend: R; Remember, U: Understand A: Application

COURSE-PO ATTAINMENT MATRIX

 Course Programme Outcomes 1 2 3 4 5 6 7 8 9 10 MECHANICS OF MACHINES 3 3 3 3 3 3 - - - 3

Method is to relate the level of PO with the number of hours devoted to the COs which address the given PO. If >40% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 3

If 25 to 40% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 2 If 5 to 25% of classroom sessions addressing a particular PO, it is considered that PO is addressed at Level 1

If < 5% of classroom sessions addressing a particular PO, it is considered that PO is considered not-addressed.

COURSE CONTENT AND BLUE PRINT OF MARKS FOR SEE/

 Unit No Unit Name Hour Questions to be set for SEE/Marks Marks weightage weightage (%) R U A 1 BASIC KINEMATICS 10 5 5 20 30 21 2 TRANSMISSION OF POWER 11 5 5 20 30 21 3 FRICTION 10 5 20 25 17 4 BALANCING 07 -- 10 10 20 14 5 CAM MECHANISAMS 10 5 5 20 30 21 6 MECHANICAL VIBRATIONS 04 5 5 -- 10 06 Total 52 20 35 90 145 100

Legend: R; Remember, U: Understand A: Application

constrained Motions- Kinematic chain- Definition of Machine, Structure and Mechanism- Difference between Machine and Structure ,Mechanism-Inversions-Types of Kinematic Chains-Four Bar Chain- Beam Engine-Coupling Rod of Locomotive-Single Slider Crank Chain- Pendulum Pump-Crank and Slotted Lever Quick Return Motion Mechanism-Double Slider Crank Chain-Elliptical trammel-Scotch yoke mechanism-Oldham’s coupling.

Belt Drives-types of flat belt drives-open, cross, idler pulley, compound, cone pulley and  fast

and loose pulley. Velocity Ratio, Slip and creep of belt, length of belt, Ratio of driving Tensions, Centrifugal Tension and Initial Tension-Power Transmitted by belts (Flat and V- Belt) and ropes- Maximum power transmitted by belt (without proof)-Problems on belt drives-Introduction to Gears  - Classification  of  Gears-Spur Gear  Terminology-Problems on

gears –(centre distance only) Introduction to Gear Trains-Types of Gear trains –Simple, Compound, Reverted and Epicyclic gear trains- Problems on Gear Trains

Friction-Introduction-Types of Friction, Laws of solid friction, coefficient of friction, limiting angle of friction, angle of Repose -Friction in Journal Bearing-Power Transmission in the Journal bearing-Friction in Thrust Bearing-Pivot Bearing– Flat and Conical bearing-Collar Bearing –Problems on bearings (Assuming uniform pressure theory)- Friction in Clutches- Single Disc Clutch- Multiple Disc Clutch- Problems on clutches (Assuming uniform wear theory)-Introduction to Brakes-Internal Expanding Brake (Mechanical & Hydraulic).

Introduction-Static and Dynamic balancing-Balancing of single rotating massby a single mass

rotating in the same plane -Balancing of several masses rotating in the same plane-Problems on above (Analytical and Graphical methods).

Cams-Introduction-Classification of followers and cams-Terminology of cam- Displacement

diagram for the following Motion of follower-Uniform velocity -Simple Harmonic Motion (SHM)-Uniform Acceleration and Retardation Motion (UARM),Cam profile construction for Knife edge follower and Roller follower.

Introduction- Terms used in Vibrations-Types of Vibrations-Free Vibrations- Forced Vibrations-Damped Vibrations-Types of Free Vibrations- Longitudinal, Transverse and Torsional- Critical or Whirling speed of a shaft.

®TEXT BOOKS

1.     Rattan.S.S, “Theory of Machines”, Tata McGraw -Hill Publishers, New Delhi, 2009.

2.   Khurmi R S, Guptha J.K “Theory of machines ”, 5 Edition, S.Chand and company

,Delhi ISBN 81-219-2524-X

REFERENCES

1.  Thomas Bevan, “Theory of Machines”, CBS Publishers and Distributors, 3rd Edition, 2005.

2.  Ramamurti,V., “Mechanism and Machine Theory”, 2nd Edition, Narosa Publishing House,2005.

3.  Ghosh.A and A.K.Mallick, “Theory of Mechanisms and Machines”, Affiliated East- WestPrivate Limited, New Delhi, 1998.

4.  Rao.J.S and Dukkipati R.V, “Mechanism and Machine Theory”, Wiley-Eastern Limited,New Delhi, 1992.

LIST OF SOFTWARES/ LEARNING WEBSITES:

1.     http://nptel.iitm.ac.in/video.php?subjectId=112104121

2.     http://www.technologystudent.com/gears1/gears7.htm

3.     http://kmoddl.library.cornell.edu/model.php?m=20http://www3.ul.ie/~kirwanp/whatisaca mandfollowersyste.htm

4.     http://nptel.iitm.ac.in/courses/Webcourse-contents/IIT- Delhi/Kinematics%20of%20Machine/index.htm

5.     http://elearning.vtu.ac.in/12/enotes/Des_Mac-Ele2/Unit6-RK.pdf

6.     www.tecquipment.com/Theory_of_Machines.aspx

7.     www.researchgate.net/.../0094-114X_Mechanism_and_Machine_Theory

8.     www.journals.elsevier.com/mechanism-and-machine-theory/

9.     www.iftomm.org/

10.  www.wiziq.com/online-tests/44047-mechanical-theory-of-machine

11.  www.cs.ubc.ca/~murphyk/Teaching/CS340-Fall07/infoTheory.pdf

SUGGESTED LIST OF STUDENT ACTIVITYS

Note: the following activities or similar activities for assessing CIE (IA) for 5 marks (Any one)

Ã¥         Each student should do any one of the following type activity or similar activity related to the course and before take up, get it approved from concerned Teacher and HOD.

Ã¥         Each student should conduct different activity and no repeating should occur

 1 List the mechanisms which you are using in your day to day life. Sketch any three from these. Study and submit handwritten report of 500 words 2 Take a photo of a actual kinematic mechanism used in an automobile, study and submit handwritten report of 500 words 3 Analyse  the  effect  of  friction in  real situation and submit                                                                                             handwritten report of 500 words 2 List the mechanism used in a typical car. study and submit handwritten report of 500 words 3 Identify and measure the dimensions of Flywheel used in automobile. study and submit handwritten report of 500 words 4 Identify the type of clutches and cams used in different automobiles and also the type of brakes in automobile and bicycle. study and submit handwritten report of 500 words 5 Visit the market and collect the data of items which are used in any mechanisms. Data includes specifications, cost, applications, etc. Also name the mechanism/s in which such item/s is/are use .Study and submit handwritten report of 500 words

Course Delivery

Ã¥         The course will be delivered through lectures and Power point presentations/ Video

Ã¥         Teachers can prepare or download PPT of different topics on Mechanisms usage in mechanical engineering application.

Ã¥         Motivate student to take case study on kinematics, power transmission and to inculcate him for self and continuous learning.

Ã¥   MODEL OF RUBRICS /CRITERIA FOR ASSESSING STUDENT ACTIVITY

 RUBRICS FOR ACTIVITY( 5 Marks) Dimension Unsatisfactory Developing Satisfactory Good Exemplary Student Score 1 2 3 4 5 Collection of data Does not collect any information relating to the topic Collects very limited information; some relate to the topic Collect much information; but very limited relate to the topic Collects some basic information; most refer to the topic Collects a great deal of information; all refer to the topic Ex: 4 Fulfil team’s roles & duties Does not perform any duties assigned to the team role Performs very little duties but unreliable. Performs very little duties Performs nearly all duties Performs all duties of assigned team roles 5 Shares work equally Always relies on others to do the work Rarely does the assigned work; often needs reminding Usually does the assigned work; rarely needs reminding Normally does the assigned work Always does the assigned work without having to be reminded. 3 Listen to other Team mates Is always talking; never allows anyone else to speak Usually does most of the talking; rarely allows others to speak Talks good; but never show interest in listening others Listens, but sometimes talk too much Listens and speaks a fair amount 2 Average / Total marks=(4+5+3+2)/4=14/4=3.5=4

Note: This is only an example. Appropriate rubrics/criteria may be devised by the concerned faculty (Course Coordinator) for assessing the given activity.

Course Assessment and Evaluation Scheme:

 What To who m When/Where (Frequency in the course) Max Marks Evidence collected Course outcomes Direct Assessment CIE IA Three IA tests (Average of three tests will be computed) 20 Blue books 1,2,3,4,5,6 Student activities 05 Activity sheets 1,2,3,4,5,6 SEE End Exam End of the course 100 Answer scripts at BTE 1,2,3,4,5,6 Indirect Assessment Student Feedback on course Middle of the course Feedback forms 1 & 2,3 Delivery of course End of Course Survey End of the course Questionnaires 1,2,3,4,5,6 Effectiveness of Delivery of instructions & Assessment Methods

Note: I.A. test shall be conducted for 20 marks. Average marks of three tests shall be rounded off to the next higher digit.

Note to IA verifier: The following documents to be verified by CIE verifier at the end of semester

1.     Blue books ( 20 marks)

2.     Student suggested activities report for 5 marks and should be assessed on RUBRICS

3.

Student feedback on course regarding Effectiveness of Delivery of instructions & Assessment Methods.