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This book introduces the subject of total design, and introduces the design and selection of various common mechanical engineering components and machine elements. These provide "building blocks", with which the engineer can practice his or her art.
The approach adopted for defining design follows that developed by the SEED (Sharing Experience in Engineering Design) programme where design is viewed as "the total activity necessary to provide a product or process to meet a market need." Within this framework the book concentrates on developing detailed mechanical design skills in the areas of bearings, shafts, gears, seals, belt and chain drives, clutches and brakes, springs and fasteners. Where standard components are available from manufacturers, the steps necessary for their specification and selection are developed.
The framework used within the text has been to provide descriptive and illustrative information to introduce principles and individual components and to expose the reader to the detailed methods and calculations necessary to specify and design or select a component. To provide the reader with sufficient information to develop the necessary skills to repeat calculations and selection processes, detailed examples and worked solutions are supplied throughout the text.
This book is principally a Year/Level 1 and 2 undergraduate text. Pre-requisite skills include some year one undergraduate mathematics, fluid mechanics and heat transfer, principles of materials, statics and dynamics. However, as the subjects are introduced in a descriptive and illustrative format and as full worked solutions are provided, it is possible for readers without this formal level of education to benefit from this book. The text is specifically aimed at automotive and mechanical engineering degree programmes and would be of value for modules in design, mechanical engineering design, design and manufacture, design studies, automotive power-train and transmission and tribology, as well as modules and project work incorporating a design element requiring knowledge about any of the content described.
The aims and objectives described are achieved by a short introductory chapters on total design, mechanical engineering and machine elements followed by ten chapters on machine elements covering: bearings, shafts, gears, seals, chain and belt drives, clutches and brakes, springs, fasteners and miscellaneous mechanisms. Chapters 14 and 15 introduce casings and enclosures and sensors and actuators, key features of most forms of mechanical technology. The subject of tolerancing from a component to a process level is introduced in Chapter 16. The last chapter serves to present an integrated design using the detailed design aspects covered within the book. The design methods where appropriate are developed to national and international standards (e.g. ANSI, ASME, AGMA, BSI, DIN, ISO).
The first edition of this text introduced a variety of machine elements as building blocks with which design of mechanical devices can be undertaken. The approach adopted of introducing and explaining the aspects of technology by means of text, photographs, diagrams and step-by-step procedures has been maintained. A number of important machine elements have been included in the new edition, fasteners, springs, sensors and actuators. They are included here. Chapters on total design, the scope of mechanical engineering and machine elements have been completely revised and updated. New chapters are included on casings and enclosures and miscellaneous mechanisms and the final chapter has been rewritten to provide an integrated approach. Multiple worked examples and completed solutions are included.
- New chapters on casings and enclosures, springs, and fasteners
- New information on important machine elements such as sensors and actuators
- Clear explanation of the total mechanical design process through the use of text, photographs, diagrams, step-by-step procedures and case studies
Undergraduate students in Mechanical Engineering; Manufacturing Engineering; Industrial design; Automotive Engineering
Part 1: Total Design
The design process
Product design specification
The technology base
Part 2: Mechanical Engineering
Part 3: Machine Elements
Gears, belts and chains
Clutches and brakes
Part 4: Bearings
An Introduction to bearings
Design of boundary lubricated bearings
Design of full film hydrodynamic bearings
Rolling contact bearings
Bearing life and selection
Part 5: Shafts
Shaft-shaft connection - couplings
Critical speeds and shaft deflection
ASME design code for transmission shafting
Part 6: Gears and gearboxes
Introduction to gears
Construction of gear tooth profiles
Simple gear selection procedure
7. ISO and AGMA gear stressing
Introduction AGMA bending and contact stress equations for spur gears
AGMA spur gear factors
AGMA bending and contact stress equations for helical gears
AGMA helical gear factors
AGMA bending and contact stress equations for straight bevel gears
AGMA bevel gear factors
AGMA equation for worm gears
Part 8: Belts and Chains
Roller chain selection
Elastomeric seal rings
Seals for rotating machinery
Seals for reciprocating components
10 Clutches and brakes
Design of disc clutches
11 Springs and dampers
Helical compression springs
Helical extension springs
Helical torsion springs
12 Miscellaneous Mechanisms
Pneumatics and hydraulics
13 Fastening and powerscrews
Introduction to permanent and non-permanent joints
Stresses in threads
Forces and torque
Power and efficiency
Self locking screws
14 Casings and enclosures
Machine frames and structures
15 Sensors and actuators
16 Tolerance engineering
Standard fits for holes and shafts
Sure-fit or extreme variability
Linear functions or tolerance chains
Several independent, uncorrelated random variables
Modern statistical design techniques and quality assurance
17 Integrated design
Management of design
Power transmission case study
Appendix Worksheet Solutions
- No. of pages:
- © Butterworth-Heinemann 2003
- 4th December 2003
- Paperback ISBN:
- eBook ISBN:
Brief Author Bio: Peter Childs is Head of the Dyson School of Design Engineering and the Professorial Lead in Engineering Design at Imperial College London. His general interests include: creativity tools and innovation; design process and design rationale; fluid flow and heat transfer, particularly rotating flow; sustainable energy component, concept and system design; robotics. Prior to his current post at Imperial he was director of the Rolls-Royce supported University Technology Centre for Aero-Thermal Systems, director of InQbate and professor at the University of Sussex. He has contributed to over 180 refereed journal and conference papers, and several books including the Handbook on Mechanical Design Engineering (Elsevier, 2013, 2019) as well as co-authoring books on rural urban migration, inclusive sports and sports technology. He has been principal or co-investigator on contracts totalling over £80 million. His roles at Imperial include joint course director for the Innovation Design Engineering double master degree run jointly by Imperial and the Royal College of Art, and Design Lead for the Manufacturing Futures Lab. He is Editor of the Journal of Power and Energy and Founder Director and Chief Scientific Officer at QBot Ltd.
Head of the Dyson School of Engineering Design, Imperial College London, UK
Comments on textbook questionnaires from previous edition:
"Good general text for Mechanical Engineering Design courses. In depth look at gears, shafts, bearings, etc. "
"Excellent for detailed design studies."
"An excellent txt to help students design specific components for a particular design application. This book is an excellent source of procedural and theoretical information. Highly recommended."
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