DOC / LP / 01 / 28.02.02

LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 1 of 8 UNIT : I

OBJECTIVE :

 To gain knowledge on the principles and procedure for the design of Power Transmission components.

 To understand the standard procedure available for Design of Transmission Systems.

 To learn to use standard Design Data book and catalogues.

DESIGN OF TRANSMISSION SYSTEMS FOR FLEXIBLE ELEMENTS 09 hrs.

Selection of ‘V’ belts and pulleys - selection of Flat belts and pulleys – Wire ropes and pulleys – Selection of Transmission chains and sprockets – Design of pulleys and sprockets.

Session Topics to be covered Time Teaching Ref No Aids Introduction to transmission systems – 50 min various types of transmission systems– 1. 4,5 Mechanical drives - Applications of individual drives Introduction to belt drives- types of belt drives – belt materials – advantages & Power disadvantages of belt drives- Design of V- 50 min point 2. belts – selection of V belts from data book Presentati 4,5 for cross section - design of V- grooved on and pulleys. Black 2 problems in design of V- belts solved in 50 min board 3 4,5 the class. Chain drives – Principle, applications, terms used in design of chain drives , adv. & 4. disadvantages of chain drives over belt 50 min drives- design equations – length of chain 4,5 required. LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page: 2 of 8 UNIT : I

Sessio Teaching Topics to be covered Time Ref No Aids 1 problem in design of chain drives solved in the class – Calculation of Sprocket 5. dimensions discussed - Failure of chain drives 50 min 5 Power discussed- Introduction to silent chains point 1 Problem in design of chain drives will given presentati 6 as exercise to the students to solved in the on class 50 min 5 and Black Introduction to design of wire ropes – board applications –1 problem in design of wire 50 min 7. 3,4 rope solved – Pulley design also discussed 8. 1 problem in design of wire ropes solved 50 min 3 Introduction to flat belt drives – Applications 50 min design equations discussed – 1 problem in 5 design of flat belts involving pulley design 9. solved 10 Tutorial class in Unit-I will be conducted 50 min

LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date :05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page: 3 of 8 UNIT : II

SPUR GEARS AND PARELLEL AXIS HELICAL GEARS 09 hrs

Gear terminology – Speed ratios and number of teeth - Force analysis – Tooth stresses – dynamic effects – Fatigue strength – Factor of Safety – Gear materials – Module and face width –power rating calculations based on strength and wear considerations – Parallel axis Helical Gears – Pressure angle in the normal and transverse Plane – Equivalent number of teeth – forces and stresses – Estimating the size of helical gears.

Session Topics to be covered Time Books Teaching No Allocation Referred Method Introduction to gear drives – classification of different types of gear drives- Gear terminology 11 – application of gear drives , materials used for 50 min 3,4,5 gears – failure of gear drives – advantages & disadvantages of gear drives Materials used for gears, heat treatment of 12. gears, advantages and disadvantages of gear 50 min 4,5 drives, and failure of gear drives. Force analysis on spur gears discussed in detail 13. 50 min 3,4,5 with the help of design data book Design of spur gears using Buckingham and Lewis equations based on beam strength of the 50 min Power 14. tooth and wear load – Calculation of FS , FD, 1,2,5 point and FW loads on the teeth. presentatio Step by step procedure of designing spur gears 50 min n 15 5 using data book discussed and Black 1 problem in design of spur gears solved using 50 min board 16. 2,5 Buckingham and Lewis equations. 1 problem in design of spur gears given as 50 min 17. 5 exercise for the students. The previous class problem will be continued 18. and completed – Listing of all dimensions of 50 min 2,5 the gears also taught Tutorial class was conducted for the students – 19. 1 problem in design of spur gear was given and 50 min 5 students were asked to solve in the class. Gear blank design – tips were given for mfr 50 min 20. gear blanks, based on material , heat treatment, 5 and machining allowances to be given .

LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 4 of 8 UNIT : II

Session Topics to be covered Time Books Teaching No Allocation Referred Method Introduction to helical & herringbone gears – special features of helical gears – adv & 50 min 21 disadvantages of helical gears over spur gears - 4,5 Design procedure of helical gears discussed. Power Force analysis on helical gears, with diagrams point 22 50 min 5 discussed presentatio 1 problem in design of helical gears solved in 50 min n 23 2,5 the class and Black Estimating the size of the gear based on the board 24 module and the face width of the gear – 1 50 min problem solved using Lewis equations. 25 Tutorial class in Unit –II will be conducted 50 min 26 CAT – I will be conducted 60 min

LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 5 of 8 UNIT : III

BEVEL ,WORM AND CROSS HELICAL GEARS 9 hrs. Straight bevel gear- Tooth terminology, tooth forces and stresses, equivalent number of teeth- Estimating the dimensions of pair of straight bevel gears. Worm gear – merits and demerits – terminology. Thermal capacity, materials-forces and stresses, efficiency, estimating the size of the worm gear pair. Cross helical – terminology – helix angle- estimating the size of the pair of cross helical gears. Session Topics to be covered Time Books Teaching No Allocation Referred Method Introduction to bevel gears – bevel gear types – 27 Comparison between spur & bevel gears – 50 min 1,2,4,5 Design procedure of bevel gears discussed Force analysis on bevel gears discussed with 28 diagram – Kinematics of bevel gear also 50 min 5 discussed 1 problem in straight bevel gear drive was 29 solved in the class using data book 50 min 1,5 Introduction to spiral bevel gear – advantages of spiral bevel over straight bevel gears 30 5 discussed – Design equations of spiral bevel 50 min gear using PSG Design data book discussed Power Tutorial class will be conducted and students point 31 have to solve 1 problem in design of spiral 50 min presentatio ..... bevel gear solved. n Introduction to worm gear – advantages & and Black 32 disadvantages of worm gears – materials used 50 min board 4,5 for worm gears. Force analysis on worm gear discussed with 33 50 min 5 diagrams Design procedure for worm gears , including calculation of efficiency of the drive. Heat 34. generated and heat dissipated calculations – 1 50 min 4,5 problem solved in design of worm gear drive Terminology of cross helical gears discussed- helix angle used – estimating the size of cross 50 min 35. 4,5 helical gears using Lewis equations – 1 problem to be solved on cross helical gears 36 Tutorial class in Unit –III will be conducted 50 min

LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 6 of 8 UNIT : IV

DESIGN OF GEAR BOXES 9 hrs.

Geometric progression – standard step ratio – Ray diagram, kinematics layout- Design of sliding gear box – constant mesh gear box – Design of multi speed gear box.

Time Session Books Teaching Topics to be covered Allocati No Referred Method on Introduction to speed reducers – single speed reducers – design procedure – 50 min 37 selection of all components used in the 4,5 reducer – selection hints. Introduction to multi-speed gearbox – step ratio – standard spindle speeds – ray /speed 38 diagrams – kinematics arrangement of the 50 min 5 Power gears in the gearbox – determination of the point tooth numbers of the gears presentati Principles of sliding mesh gear box and 50 min 39 4 on constant mesh gear box discussed and Black Design of a six speed gearbox solved in the board class - complete solution for the problem 40 for 3 x 2 arrangement discussed – and 50 min exercise given to students to solve for 2 x 3 4,5 arrangement. Design of a 9 speed gearbox for 3 x 3 arrangement solved, and kinematics layout 50 min 41 of the gearbox showing arrangement of the 5 gears also drawn . Students taken to the M/c. shop and 42 explained with the help of the ray diagram 50 min M/c. shop for 18 spindle speeds used in a Milling m/c. 1 problem solved in design of a 18 speed Power 43 gear box solved – Kinematic layout of the 50 min 4,5 point 18 speed gear box drawn and explained presentati 44 Tutorial class in Unit –IV will be conducted 50 min 4,5 on CAT II will be conducted 90 min and Black 45 board LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date: 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 7 of 8 UNIT : V DESIGN OF CAM, CLUTCHES AND BRAKES 9 hrs. Cam Design – Types – pressure angle and under cutting base circle determination- forces and stresses. Design of plate clutches - Axial and cone clutches- internal expanding rim clutches – internal and external shoe brakes.

Session Topics to be covered Time Books Teaching No Allocation Referred Method Introduction to internal expanding Rim 50 min 46 Clutches – External contacting rim clutches 4,5 discussed Design of Dry and Wet type clutches – 50 min Power 47 Design equations – Calculation of contact 4,5 point forces using data book discussed presentatio n 1 Problem each in dry type and wet type 48 50 min 4,5 and Black clutches solved board Frictional contact Axial clutches, cone 49 clutches discussed – Calculation of 50 min 4,5 frictional force done – 50 1 Problem in cone clutch solved 50 min 4,5 Students will be taken to automobile engg. 51 Lab for demonstration of different type of 50 min Auto Lab clutches and brakes Design of brakes – force analysis in external 52 50 min 4,5 brakes-single shoe brakes 53 1 problem in design of brakes solved 50 min 4,5 54 Double shoe brakes - problems 50 min 4,5 Power 55 Band brakes - Problems 50 min 4,5 point Band and block brakes – Internal expanding presentatio 56 50 min 4,5 shoe brakes - problems n Design of Cams – contact stresses – and Black 57 determination of base circle, diameter to 50 min 5 board avoid undercutting – problems solved General review of probable Part A questions 58 50 min covering all the five units – discussed. 59 Tutorial Class in Unit –V will be conducted 50 min 60 CAT- III will be conducted 60 min

DOC / LP / 01 / 28.02.02 LESSON PLAN LP-ME 2352 Sub Code : ME 2352 Revision No: 01 Sub Name : Design of Transmission Systems Date : 05/01/2015 Semester & Branch : VI Sem – Mechanical Engg., Page : 8 of 8

Course Delivery Plan:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Week I II I II I II I II I II I II I II I II I II I II I II I II I II I II I II

Units

TEXT BOOK & REFERENCE BOOKS USED :

1. Fundamentals of Machine Component Design - by Robert C. Juvinall - John Wiley & Sons - 3 rd edition - 2002 2. Design of Machine Elements - by V.B. BHANDARI - Tata McGraw Hill Publishing Company ltd., New Delhi – 2000

3. Mechanical Engineering Design - by J.E . Shigly. - McDraw Hill International

4. Design of Transmission Elements – by V. JAYAKUMAR, Lakshmi Publications

5. P.S.G. DESIGN DATA BOOK - DPV Printers, Coimbatore

6. Design of Transmission systems - by T.J. PRABHU - Kasturi & Sons, Chennai.

Prepared by Approved by Signature Name Prof. Dr. T. Raja Dr. K. Pitchandi Designation Professor in Mechanical Engg., HOD - Mechanical Engg., Date 05-01-2015 05-01-2015.