Machine Design I

Machine Design – I Semester VI - Mechanical Engineering (Mumbai University)

R. B. Patil M.E. (Mech) (Design Engg.) Head, Department of Mechanical Engineering, Army Institute of Technology, Pune. Machine Design – I R. B. Patil (Semester VI : Mechanical Engineering, Mumbai University)

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First Edition : January 2010

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ISBN 978-81-8492-263-9

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(Tech Max Book Code : M44) Price Rs. 435/- Syllabus

Module 1

Mechanical Engineering Design, design methods, Aesthetic and Ergonomics consideration in design Material Properties and their uses in design Manufacturing considerations in design : tolerances, types of fits, selection of fits Design considerations of casting and forging Basic principles of Machine design, Modes of failures, factor of safety, design stresses, Principle Stresses, Theories of failures Standards, I. S. codes, Preferred Series and numbers. (Refer chapters 1, 2 and 3) Module 2

Design against static Loads : Cotter joint, knuckle joint, Turn Buckle Bolted and welded joints under eccentric loading. Power Screw – Screw Presses along with the Frame (Refer chapters 4, 5, 6 and 7)

Module 3

Design against Fluctuating Loads Variables stresses, reversed, repeated, fluctuating stresses Fatigue Failure Static and fatigue stress concentration factors Endurance limit – estimation of endurance limit Design for finite and infinite life Soderberg and Goodman design criteria Fatigue design under combined stresses (Refer chapter 8)

Module 4

Design of shaft – power transmitting, power distribution shafts (excluding crank shaft) under static and fatigue criteria. Keys – Types of Keys and their selection based on shafting condition. Couplings – Classification of coupling. Selection of Standard Bush Pin coupling. (Refer chapter 9)

Module 5

Design of springs – Helical compression, tension springs under static and variable loads, Laminated springs. (Refer chapter 10)

Module 6

Design of Belts – Flat and V belt with Pulley construction Selection of Standard Roller chains. (Refer chapter 11)

 Preface

It gives a great pleasure to present this book on ‘Machine Design - I’. This book has been written for the first course in ‘Machine Design’, especially for the prefinal year students of mechanical engineering. This is the first book of the series on ‘Machine Design’ which comprehensively covers the design concepts and the design of various machine elements. The main objective of this book is to bridge the gap between the reference books written by the renowned international authors and the requirements of undergraduate students.

The book has been presented in a simple language without compromising the quality of text. The concepts have been developed from the fundamentals. The main emphasis has been given on explaining the concepts rather than merely providing the information. Every concept is illustrated with the help of number of solved examples which are arranged in the order of increasing degree of difficulty. The list of formulae has been given at the end of each chapter for the ready reference. This book is an outcome of the years of classroom interaction with the students.

I would like to express my thanks to Shri. Sachin Shah and Shri Pradeep Lunawat of ‘Tech-Max Publication’ for their efforts in publishing this book. My thanks are due to all those people who have directly or indirectly contributed to this book.

Last, but not least, my special thanks go to all my students whose continuous feedback while teaching this subject is the source of inspiration behind this book.

A feedback in the form of suggestions and comments from the readers for further improvement of the book will be highly appreciated.

- R. B. Patil

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