DESIGN AND FABRICATION OF AN OLDHAM COUPLING

MECHANISM

Term Project
Submitted in Fulfillment of the
Requirement for Award of the Degree
Of

BACHELOR OF TECHNOLOGY
In
MECHANICAL ENGINEERING

By
Kamrul haque (11306443)

Under the Guidance of

Dr. Rj Ronald Aseer

DEPARTMENT OF MECHANICAL ENGINEERING

LOVELY PROFESSIONAL UNIVERSITY

PHAGWARA, PUNJAB (INDIA) -144402
2019-20

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 Acknowledgement

It is my proud privilege and duty to acknowledge the kind of help and guidance received
from several people in preparation of this term paper. It would not have been possible to
prepare this report in this form without their valuable help, co-operation and guidance.

Our special thanks to library department, lovely faculty of technology science for giving
us valuable books and journals. At last but not least we are very thankful to our parents
who inspired us and helped us.

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 Lovely Professional University Jalandhar, Punjab

CERTIFICATE

We hereby certify that the work which is being presented in the capstone entitled
“Design And Fabrication Of An Oldham Coupling Mechanism” in partial fulfillment
of the requirement for the award of degree of Bachelor of Technology and submitted
in Department of Mechanical Engineering, Lovely Professional University, Punjab is an
authentic record of my own work carried out during period of term paper under the
supervision of Dr Rj Ronald Aseer, Assistant professor, Department of Mechanical
Engineering, Lovely Professional University, Punjab.

The matter presented in this capstone has not been submitted by me anywhere for the
award of any other degree or to any other institute. .

Date: 08-11-2019 (Kamrul Hque)

This is to certify that the above statement made by the candidate is correct to best of
my knowledge.

Date: 04-11-2019 (Ronald Aseer)

Supervisor

The B- Tech term paper examination of mechanical, has been held on _____________

Signature of Examiner

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 Abstract

Couplings are most commonly used for connection and transmitting power and motion.
Couplings are necessary to connect one shaft to another or to couple a drive shaft to
driven shaft. For better working of coupling or any other mechanical component
designing and manufacturing is very important term. In this paper design of coupling is
considered an easy way; out of the traditional design process. In modern era, many
modelling software is available in the commercial market. Three dimensional modelling
can easily generate in these kind of software for better imagination, visualization and
better understanding; as well as to prepare manufacturing drawings and flexible as
compared to two dimensional traditional drafting. By using Parametric modelling makes
this creating task stress-free and take very less time because basic features and relations
between them are in constant fashion for a specific product.

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 List of figure

Sn Tittle Page no

Fig-1 OLDHAM COUPLING MECHANISM

Fig-2 LEFT DISC

Fig-3 RIGHT DISC

Fig-4 CENTER DISC

Fig-5 FRAM

Fig-6 STANDARD VIEW OF LEFT DISC

Fig-7 STANDARD DISC OF RIGHT DISC

Fig-8 STANDARD VIEW OF CENTER DISC

Fig-9 STANDARD VIEW OF FRAM

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 CONTENTS

Acknowledgment
Certificate
Abstract
List Of Figures
Chapter 1- Introduction
1.1 Introduction
1.2 List of parts
1.3 Applications
1.4 Objective
1.5 CAD model
1.6 Working principle
1.7 Advantages of the model
1.8 Disadvantages of the model
Chapter 2- Literature Review
Chapter 3- Design On Creo 2.0
Chapter 4- Conclusion and Future
5.1 Future
5.2 Conclusion
Chapter 5 - Suppliers of Oldham Coupling in India
Chapter 4 - Reference

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 Chapter-1 Introduction
1.1 Introduction

The basic function of coupling is transmitting torque from one shaft to the other. There
are two types of coupling (1) rigid coupling (2) Flexible coupling. Coupling which cannot
accommodate misalignment are called as rigid coupling. These type of couplings are
normally used when the load transmission is very low speed. Flexible coupling are
characterised by their ability to absorb some amount of misalignment. This capability
provided by having some flexible element in coupling. In this paper only flexible Oldham
coupling is consider for parametric modelling. For generation of part model for coupling
to generate part of flange following parameters are required like inner diameter, outer
diameter, Slider height, slider width.
The term Oldham coupling is to describe a mechanism for power transmission. It is a
form of flexible coupling. The coupling is designed for applications that must be free
from backlash during operation. These days the Oldham coupling is used to replace
straight jaw couplings. The application of Oldham coupling is mainly for better
performance and efficiency. Referring to the design of the Oldham coupling, an element
consists of three components in the form of discs.

Typically, made up of aluminum or stainless steel, two of the discs connect on either side
of the drive. The third disc, which is made up of several plastics, is pack in between a
tongue and groove design. When in operation, the centre of the discs slides on the
tongues that are perpendicular to each other. They transmit torque. The Oldham
coupling is useful in applications with parallel misalignment.

1.2Objective
With the Applications of Oldham Coupling, it is mostly used to connect two parallel
shafts whose axes are at a small distance apart. The couplings are typically used in
applications that require motion control where there is a zero-backlash performance

1.3Application

In this era of innovation, new technologies are available in large manufacturing

industries. Couplings are vital elements in machinery. The Oldham coupling was

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introduced to connect two parallel non-coaxial shafts. The coupling is an element that
has a good mechanism. It transmits the same speed and has the identical direction of
rotation. Furthermore, the biggest applications of Oldham coupling are in robotics and
servo in addition to the printer and copy machines

1.4 Working principle

When three disc, one disc coupled to input of shaft connect and another disc coupled
to output of torque. The Center disc joined each other disc. The tongue and groove has
one side is perpendicular to other side of tongue and groove. The spring is used to this
mechanism for reduce the coupling backlash. During power transmission of one drive to
another, the centre disc is slide on torque of each hub. The sliding motion include small
amount of angular and axial misalignment. They are useful in application with parallel
misalignment.

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1.5 Cad Model

I have design this in the application called cero parametric 2.0.

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1.6 Advantage

1 The plastic centre disc has the potential for electrical isolation.

2 It acts as a sort of fuse for a machine.

3 Exert low reactive forces that protect the support of bearings.

4 The driving and driven shafts rotate at the same speed.

5 There are zero backlash and torsional stiffness.

6 It acts as electrical insulation.

7 Has accommodation for large radial misalignment.

8 Compared to other couplings that have similar performance and characteristics, it is

economic.

9 The replaceable wear element is inexpensive.

10 It has a low moment of inertia and has an easy installation in blind.

1.7 Disadvantage

1 When damage of coupling, the machine component is most costly.

2 It accommodates a relatively small angular misalignment.

3 It has lower peak torque and torsional stiffness.

4 There is an angular misalignment.

5 The driven and driving shafts do not move at exactly the same speed in one rotation.

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 Chapter-2 Literature Review
2.1 . A.J. Mazzeia , R.A. Scottb, “ Effects Of Internal Viscous Damping On The Stability Of A
Rotating Shaft Driven Through A Universal Joint” 2002
A pivoting adaptable shaft, with both outer and inside thick damping, driven through a general
joint. The scientific model of it comprises of an arrangement of coupled, direct incomplete
differential mathematical statements with time-subordinate coefficients. Galerkin's system is
utilized which prompts an arrangement of coupled straight differential mathematical
statements with time subordinate coefficients. By the utilization of these differential
mathematical statements a few impacts of inner gooey damping on parametric and shudder
insecurity zones are examined by the monodromy lattice method. The shudder zones are
acquired on disposing of the time-subordinate coefficients in the differential comparisons which
prompts an eigenvalue examination.
2.2 G. Pantazopoulos , A. Sampani , E. Tsagaridis , “Torsional Failure Of A Knuckle Joint Of
A Universal Steel Coupling System During Operation” – A Case Study 2006
In this paper, the disappointment examination of a cracked knuckle joint of a general coupling
framework is introduced. The coupling frameworks transmit rotational movement to the move
down moves of an aluminum sheet straightening machine in an aluminum circles creation plant.
Optical examination of disappointment surfaces and light microscopy are utilized as the key
examination methods to dissect the above disappointment. Survey of the operation conditions
and the examination discoveries uncovered that the strange capacity of oil was a noteworthy
patron to the disappointment.
2.3 Guo Yanying , Sun Zhonghui and Sun Zhonghong , “The Kinematics Analysis on Single
Cross Universal Joint” September 3-5, 2008
In this paper, another strategy for space scientific geometry is presented .By the utilization of it
the kinematics qualities of single cross widespread joint is broke down. It is contrasted and
conventional strategy, for example, clear geometry, three component complex and multi-body
framework elements, space diagnostic geometry has qualities of brachylogy and understand
capacity. It is a more advantageous approach to examine the kinematics attributes of single cross
all inclusive joint. The Matlab programming is utilized for recreation to dissect kinematics
qualities of pivot pace and rakish increasing speed of cross all inclusive joint driven fork shaft

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 Chapter 3- Design On Creo 2.0
I have made this Oldham coupling in creo 2.0 software.
Major dimension are given below.
Diameter of Disc = 70 mm
Diameter of Shaft of the disc = 20 mm
Length of fram = 730 mm
Width of fram = 50 mm
Misalignment of shaft from base = 8 mm

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Fig-3.1 Standard View Of Left Disc

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Fig-3.1 Standard View Of Right Disc

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Fig-3.3 Standard View Of Center Disc

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Fig -3.4 Standard View Of Fram

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Suppliers of Oldham Coupling in India

Industrialization has led a number of industries to move towards the manufacturing

sector. Industrial equipment and machinery require components like couplings,
bearings and another element. In India, several companies are supplying Oldham
coupling. Furthermore, the key suppliers of Oldham coupling are

 Dadu Enterprises,

 Vishnuvisai Engineering & Trading,

 Tradelink Services,

 Rotolinear Systems,

 Aditya Precitech,

 Trans Equipment

 Precision Bearing House

 India Machinery & Bearing Store.

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 References
 International Journal of Innovative Research in Science, Engineering and
Technology
 Introduction to design engineering ss rattan
 https://www.daduenterprises.com/gblog/applications-of-oldham-
coupling/#Applications_of_Oldham_Coupling
 http://ijetsr.com/images/short_pdf/1522771663_1863-1866-
DYP1076_A_Review_paper_on_Combination_of_Oldham.pdf
 https://pdfs.semanticscholar.org/7a45/db21d0b3fcebee8ffc96451ffa89c6b185a
f.pdf