AIndustrial training

Taken onNational Bearing Company (Tapered Roller Bearing), Jaipur

SubmittedIn partial fulfillment

For the award of the degree of

Bachelor of TechnologyIn Department of Mechanical Engineering

Session 2011-2015

SUBMITTED TO:- SUBMITTED BY:-

Mr. Harimohan Sharma Kumar Sawan Basetha

(Head of Mech. Department) Roll No.-11EAGME028

B.TECH – (VII sem)

APEX GROUP OF INSTITUTIONS, JAIPUR RAJASTHAN TECHNICAL UNIVERSITY, KOTA

SEPTEMBER, 2014

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CERTIFICATE

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ACKNOWLEGMENT

I would like to extend my heartfelt gratitude towards Apex Group of institutions

jaipur for providing me with an excellent opportunity to undergo Seminar from this

prestigious engineering College of our country.

On the personal front I must thank Mr. Harimohan Sharma Head of Department –

Mechanical, for providing me the very first introduction on the practical side of the

subject, thereby opening an interesting Seminar Project opportunity besides extending

me valuable guidance from time to time.

It is difficult to overstate my gratitude towards my faculty, Mr. Amit Sharma

Mechanical Department. It was only with his active support, inspiration and efforts to

explain concepts clearly, that this seminar program became very interesting and

fruitful for me. Throughout the seminar project period he was a constant source of

encouragement, guidance, and knowledge. Despite his busy work schedule with the

ongoing projects, he took out time to help me collect plenty of study material from the

in-house resources as well as made himself available to clear all the doubts and

problems which arouse during the course of the training.

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ABSTRACT

We feel profound happiness in forwarding this industrial training report as an image

of sincere efforts. It is almost in evitable to ensure indebt ness to all who generously

helped by sharing their valuable experience & devoting their precious time with us,

without whom this industrial training report would never have been accomplished.

I am highly indebted to Mr. Aditya Shangi in the Ball department for providing us

with the opportunity of industrial training such reputed and leading industry where we

were not only trained in technical aspects but also on human grounds. We also thanks

to the staff of the industry who, throughout the visit guided us their valuable guidance

is indeed praiseworthy in the entire process.

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CONTENTS

FRONT PAGE………………………………….…………………………….…..….i

CETIFICATE…………………………………………………………………….….ii

ACKNOWLEDGEMENT…………………………………………………………..iii

ABSTRACT………………………………………………………………….......….iv

CONTENTS…………………………………………………………………....……v

LIST OF FIGURE……………………………….…………………………………viii

CHAPTER-1INTRODUCTION…………………………….…………………………………….…

11.1. Company profile…………………………….………………………………….…

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1.2. Milestones ………………………………….………………………………….…2

1.3. Technical collaboration …………………….……………………………….……3

1.4. Main Customers………………………………………………………………..…3

1.5. Manufacturing Facilities………………………………………………………..…4

1.5.1. Newai (Gunsi) Plant…………………….……………………………………5

1.5.2 Manesar Plant……………………………………………………………….…5

CHAPTER-2NBC JAIPUR……………………………………………………………………….…6

2.1. Introduction…………………………………………………………………….…6

2.2. Ball Bearing…………………………………………………………………….…7

2.3. Precision Ball Making ……………………....……………………………………8

2.4. Tapered roller bearing……………………….……………………………………8

2.5. Railway bearing…………………………….…………………………………….9

2.5.1 Roller bearing & axle boxes……………...……………………………………9

2.5.2. Spherical roller bearing………………...……………………………………10

2.5.3. Cartridge tapered roller bearing………..……………………………………11

2.6. Large diameter bearing……………………..……………………………………11

2.7. Research and development ………………...……………………………………11

2.7.1. Design and development……………….……………………………………11

2.7.2. Machine building……………………………………………………………12

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2.8. SAP-ERP…………………………………..………………………………….…12

CHAPTER-3BEARING…………………………………….……………………….……...……...13

3.1. Definition of Bearing………………………………………………….…………13

3.2. Principles of Operation…………………...……………………………...………13

3.3. Motions…………………………………………………………….…….………14

3.4. Loads………………………………………………………………………….…14

CHAPTER-4CLASSIFICATION OF BEARING……………………………………………….…15

4.1. Sliding contact bearing…………………….………………………………….…15

4.1.1. Hydrodynamic bearing………………...………………………………….…15

4.1.2. Hydrostatic bearing……………………………………………………….…16

4.2. Rolling contact bearing……………………………………………………….…16

4.2.1. Ball Bearings……………………………………………………..……….…16

4.2.2. Roller Bearings……………………………………………………...…….…16

4.2.2.1. Tapered Roller Bearings…………..………………………………….…16

CHAPTER-5MATERIAL USED IN BEARING ……………………………………………….…17

5.1. Bearing material…………………………...………………………………….…17

5.2 Flow of Material in Bearing ……………….………………………………….…18

CHAPTER-6TAPERED ROLLER BEARING………………………………………………….…19

6.1. Introduction………………………………..………………………………….…19

6.2. Product Subtypes………………………….………………………….……….…20

6.2.1. Single Row (TRB) …………………….………………………………….…20

6.2.2. Double Row (TRB) …………………...………………………………….…21

6.2.3. Four Row (TRB) ……………………...………………………………….…21

6.2.4. Tapered Roller Thrust…………………………………………………….…21

CHAPTER-7PROCESS OF MANUFACTURING………….………………………………….…22

7.1. Manufacturing Processes of Tapered Roller Bearing Bearing………..…………22

7.2. Heat treatment and laboratory………………………………………..……….…23

7.3. Carburizing…………………………………………………………..…….….…24

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7.4. Hardening Furnace…………………………………………………..…….….…25

7.5. Quenching…………………………………………………………………….…25

7.6. Tampering…………………………………………………………………….…26

7.7. Rockwell hardness test……………………………………………….……….…27

7.8. Grinding Section……………………………………………………..……….…28

7.9. Assembly section………………………………………….………….…………29

7.10. Maintenance and inspection section……………………………………………29

7.10.1 For machines………………………………………….………….…………29

7.10.2. For bearing components………………………………………..….………30

CHAPTER-8MANUFACTURING & ASSEMBLY………………………………………...….…31

8.1. Inner & Outer Ring Manufacturing…………………………………..……….…31

8.2. Roller Manufacturing…………………………………………………...…….…33

8.3. Cage Manufacturing………………………………………………….……….…34

8.4. Roller Bearing Assembly Line……………………………………….……….…35

CHAPTER-9APPLICATIONS………………………………………………………….……….…

36

CHAPTER-10CONCLUSION…………………………………………………………………....…37

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LIST OF FIGURE

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Fig.1.1 Milestones of NEI …...………………………………………….

Fig.1.2: Manesar Plant …………………………………………………..

Fig.2.1: Jaipur Plant ……………………………………………………..

Fig.2.2: Nbc Design and Development …………………………………

Fig.2.3: Ball Bearings …………………………………..……………….

Fig.2.4: Steel Ball ……………………………………………………….

Fig.2.5: Tapered Roller Bearings ……………………….……………….

Fig.2.6: Axle Boxes ………………………..…………………………….

Fig .2.7: Railway Bearings ……………………………………...……….

Fig.4.1: Hydrodynamic bearing …………………………………...…….

Fig.4.2: Hydrostatic bearing ………………………………………….….

Fig.5.1: Flow of Material in Bearing…………………………………….

Fig.6.1: Tapered roller bearings …………………………………………

Fig.6.2: Tapered roller bearing components …………………………….

Fig.6.3: Single Row (TRB) ……………………………………………...

Fig.6.4: Double Row (TRB) …………………………………………….

Fig.6.5: Four Row (TRB) ……………………………………………….

Fig.6.6: Tapered Roller Thrust ………………………………………….

Fig.7.1: Manufacturing Processes of Tapered Roller Bearing …………..

Fig.7.2: Heat treatment sequence ………………………………………..

Fig.7.3: heating sequence of spherical bearings …………………………

Fig.7.4: Rotary hearth furnace …………………………………………...

Fig.7.5: Tempering furnace ……………………………………………..

Fig.7.6: Rockwell hardness test setup …………………………………...

Fig.7.7: Elements after assembly of spherical bearings …………………

Fig.8.1: Flow Chart of Inner & Outer Ring Manufacturing ……………..

Fig.8.2: Manufacturing of Roller ………………………………………..

Fig.8.3: Cage Manufacturing ……………………………………………

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29 Fig.8.4: Roller Bearing Assembly Line ………………………………… 35

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