DOC / LP / 01 / 28.02.02
LP-ME 2352
LESSON PLAN
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
No
1.
2.
3
4.
Topics to be covered
Time
Introduction to transmission systems –
various types of transmission systems–
Mechanical drives - Applications of
individual drives
Introduction to belt drives- types of belt
drives – belt materials – advantages &
disadvantages of belt drives- Design of Vbelts – selection of V belts from data book
for cross section - design of V- grooved
pulleys.
2 problems in design of V- belts solved in
the class.
Chain drives – Principle, applications, terms
used in design of chain drives , adv. &
disadvantages of chain drives over belt
drives- design equations – length of chain
required.
50 min
Ref
Teaching
Aids
4,5
50 min
4,5
50 min
4,5
50 min
4,5
Power
point
Presentati
on and
Black
board
LP-ME 2352
LESSON PLAN
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
No
5.
6
7.
8.
9.
10
Topics to be covered
1 problem in design of chain drives solved in
the class – Calculation of Sprocket
dimensions discussed - Failure of chain drives
discussed- Introduction to silent chains
1 Problem in design of chain drives will given
as exercise to the students to solved in the
class
Introduction to design of wire ropes –
applications –1 problem in design of wire
rope solved – Pulley design also discussed
1 problem in design of wire ropes solved
Introduction to flat belt drives – Applications
design equations discussed – 1 problem in
design of flat belts involving pulley design
solved
Tutorial class in Unit-I will be conducted
Time
50 min
50 min
50 min
50 min
50 min
Ref
5
5
3,4
3
5
50 min
Teaching
Aids
Power
point
presentati
on
and Black
board
LP-ME 2352
LESSON PLAN
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
No
11
12.
13.
14.
15
16.
17.
18.
19.
20.
Topics to be covered
Introduction to gear drives – classification of
different types of gear drives- Gear terminology
– application of gear drives , materials used for
gears – failure of gear drives – advantages &
disadvantages of gear drives
Materials used for gears, heat treatment of
gears, advantages and disadvantages of gear
drives, and failure of gear drives.
Force analysis on spur gears discussed in detail
with the help of design data book
Design of spur gears using Buckingham and
Lewis equations based on beam strength of the
tooth and wear load – Calculation of FS , FD,
and FW loads on the teeth.
Step by step procedure of designing spur gears
using data book discussed
1 problem in design of spur gears solved using
Buckingham and Lewis equations.
1 problem in design of spur gears given as
exercise for the students.
The previous class problem will be continued
and completed – Listing of all dimensions of
the gears also taught
Tutorial class was conducted for the students –
1 problem in design of spur gear was given and
students were asked to solve in the class.
Gear blank design – tips were given for mfr
gear blanks, based on material , heat treatment,
and machining allowances to be given .
Time
Allocation
50 min
Books
Referred
3,4,5
50 min
4,5
50 min
3,4,5
50 min
1,2,5
50 min
50 min
50 min
50 min
50 min
Teaching
Method
5
2,5
5
2,5
5
50 min
5
Power
point
presentati
on
and Black
board
LP-ME 2352
LESSON PLAN
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
No
21
22
23
24
25
26
Topics to be covered
Introduction to helical & herringbone gears –
special features of helical gears – adv &
disadvantages of helical gears over spur gears Design procedure of helical gears discussed.
Force analysis on helical gears, with diagrams
discussed
1 problem in design of helical gears solved in
the class
Estimating the size of the gear based on the
module and the face width of the gear – 1
problem solved using Lewis equations.
Tutorial class in Unit –II will be conducted
CAT – I will be conducted
Time
Allocation
Books
Referred
Teaching
Method
50 min
4,5
50 min
50 min
50 min
50 min
60 min
5
2,5
Power
point
presentati
on
and Black
board
LP-ME 2352
LESSON PLAN
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
No
27
28
29
30
31
32
33
34.
35.
36
Topics to be covered
Introduction to bevel gears – bevel gear types –
Comparison between spur & bevel gears –
Design procedure of bevel gears discussed
Force analysis on bevel gears discussed with
diagram – Kinematics of bevel gear also
discussed
1 problem in straight bevel gear drive was
solved in the class using data book
Introduction to spiral bevel gear – advantages
of spiral bevel over straight bevel gears
discussed – Design equations of spiral bevel
gear using PSG Design data book discussed
Tutorial class will be conducted and students
have to solve 1 problem in design of spiral
bevel gear solved.
Introduction to worm gear – advantages &
disadvantages of worm gears – materials used
for worm gears.
Force analysis on worm gear discussed with
diagrams
Design procedure for worm gears , including
calculation of efficiency of the drive. Heat
generated and heat dissipated calculations – 1
problem solved in design of worm gear drive
Terminology of cross helical gears discussedhelix angle used – estimating the size of cross
helical gears using Lewis equations – 1 problem
to be solved on cross helical gears
Tutorial class in Unit –III will be conducted
Time
Allocation
50 min
50 min
50 min
50 min
50 min
50 min
50 min
50 min
50 min
50 min
Books
Referred
Teaching
Method
1,2,4,5
5
1,5
5
.....
4,5
5
4,5
4,5
Power
point
presentati
on
and Black
board
LP-ME 2352
LESSON PLAN
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.
Session
No
37
38
39
40
41
42
43
44
45
Topics to be covered
Time
Allocati
on
Introduction to speed reducers – single
speed reducers – design procedure –
50 min
selection of all components used in the
reducer – selection hints.
Introduction to multi-speed gearbox – step
ratio – standard spindle speeds – ray /speed
diagrams – kinematics arrangement of the
50 min
gears in the gearbox – determination of the
tooth numbers of the gears
Principles of sliding mesh gear box and
50 min
constant mesh gear box discussed
Design of a six speed gearbox solved in the
class - complete solution for the problem
for 3 x 2 arrangement discussed – and
50 min
exercise given to students to solve for 2 x 3
arrangement.
Design of a 9 speed gearbox for 3 x 3
arrangement solved, and kinematics layout
50 min
of the gearbox showing arrangement of the
gears also drawn .
Students taken to the M/c. shop and
explained with the help of the ray diagram
50 min
for 18 spindle speeds used in a Milling m/c.
1 problem solved in design of a 18 speed
gear box solved – Kinematic layout of the
50 min
18 speed gear box drawn and explained
Tutorial class in Unit –IV will be conducted 50 min
CAT II will be conducted
90 min
Books
Referred
Teaching
Method
4,5
5
4
Power
point
presentati
on
and Black
board
4,5
5
M/c. shop
4,5
4,5
Power
point
presentati
on
and Black
board
LP-ME 2352
LESSON PLAN
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
No
Topics to be covered
Time
Allocation
50 min
Books
Referred
53
Introduction to internal expanding Rim
Clutches – External contacting rim clutches
discussed
Design of Dry and Wet type clutches –
Design equations – Calculation of contact
forces using data book discussed
1 Problem each in dry type and wet type
clutches solved
Frictional contact Axial clutches, cone
clutches discussed – Calculation of
frictional force done –
1 Problem in cone clutch solved
Students will be taken to automobile engg.
Lab for demonstration of different type of
clutches and brakes
Design of brakes – force analysis in external
brakes-single shoe brakes
1 problem in design of brakes solved
54
Double shoe brakes - problems
50 min
4,5
55
50 min
4,5
50 min
4,5
50 min
5
59
Band brakes - Problems
Band and block brakes – Internal expanding
shoe brakes - problems
Design of Cams – contact stresses –
determination of base circle, diameter to
avoid undercutting – problems solved
General review of probable Part A questions
covering all the five units – discussed.
Tutorial Class in Unit –V will be conducted
60
CAT- III will be conducted
60 min
46
47
48
49
50
51
52
56
57
58
Teaching
Method
4,5
50 min
4,5
50 min
4,5
50 min
4,5
50 min
4,5
50 min
Auto Lab
50 min
4,5
50 min
4,5
50 min
50 min
Power
point
presentati
on
and Black
board
Power
point
presentati
on
and Black
board
DOC / LP / 01 / 28.02.02
LP-ME 2352
LESSON PLAN
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:
Week
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
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
Date
Professor in Mechanical Engg.,
05-01-2015
HOD - Mechanical Engg.,
05-01-2015.