Gupta Kapil - Advanced Gear Manufacturing and Finishing: Classical and Modern Processes

1. Tables in Chapter 1
2. Tables in Chapter 3
3. Tables in Chapter 5
4. Tables in Chapter 6

1. Figures in Chapter 1
2. Figures in Chapter 2
3. Figures in Chapter 3
4. Figures in Chapter 4
5. Figures in Chapter 5
6. Figures in Chapter 6
7. Figures in Chapter 7

Kapil Gupta

Sr. Lecturer, Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannesburg, RSA

Neelesh Kumar Jain

Professor, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore, India

Rudolph Laubscher

Associate Professor, Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, RSA

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Kapil Gupta, Sr. Lecturer, Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannesburg, RSA

Neelesh Kumar Jain, Professor, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, Indore, India

Rudolph Laubscher, Associate Professor, Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, RSA

Gears and the associated gear manufacturing industry maintain a unique but significant position in the manufacturing sector at large. Almost every manufacturing industry utilizes gears and/or gear assemblies in one form or the other as part of their manufacturing process. The gear industry is not immune to technological advancement and requires new processes and techniques to fulfill the requirements of new and unique specialized transmissions that are being developed all the time. This development of new and novel techniques along with the advancements in the conventional processes needs to occur within the framework of quality, productivity, and ecological impact.

The aim of this book is to provide a concise collection of research and development aspects, salient features, applications, process principles and mechanism of advanced gear manufacturing processes.

It consists of seven chapters that include an introduction to gear engineering, conventional and advanced gear manufacturing and finishing processes, surface modification of gears, and eventually concludes with a chapter on gear metrology. , Measurement of Gear Accuracy, where the gear metrology is presented and discussed.

The main audience targeted for this book is researchers, engineers, technical experts, and specialists working in the area of gear manufacturing and finishing.

The authors acknowledge Academic Press Inc. for this opportunity and for their professional support. Finally, the authors would like to thank all those who assisted during the development of this book.

Gears are basic mechanical components used to transmit motion and/or power and are responsible for the smooth functioning of a significant number of machines, instruments, and equipments employed in most major industrial, scientific, and domestic applications. The purpose of this chapter is to present a basic introduction to gears, their use, and manufacture. The chapter commences with an introduction to gears along with a brief history. A classification scheme is then presented based on the gear-shaft axis orientation and corresponding gear types with their unique features and applications. The applicable gear terminology and nomenclature along with the most important gear materials, their properties, and application areas are presented next. The chapter is concluded with a brief introduction into gear manufacture comprising both conventional and advanced types along with the relevant finishing processes.

Bevel gear; involute; gear hobbing; noncircular gear; spline; spur gear; worm wheel

A gear is basically a toothed wheel that works in tandem with another gear (or gears) to transmit power and/or motion to change speed and/or direction of motion. Dudley defined a gear as a geometric shape that has teeth uniformly spaced around the circumference and is made to mesh its teeth with another gear . Slipping is a major problem during transmission of motion and power between two shafts by rope or belt drive and consequently may affect the precision and efficiency of the system adversely. This slipping phenomenon is largely avoided by means of gear drives. The compact layout, flexibility, high efficiency, and reliability are the most important features that make gears and gear drives the first choice in many applications. Gear sizes range from nanometers (nanogears) to meters (macrogears) with corresponding application areas from nanoelectromechanical systems (NEMS) to large mills and wind turbines. A wide range of materials ranging from plastics and ceramics to ultrahigh strength steels are used in gear manufacture.