Mechanical Design (eBook)
384 Seiten
Elsevier Science (Verlag)
978-0-08-047342-0 (ISBN)
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
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 "e;building blocks"e;, 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 "e;the total activity necessary to provide a product or process to meet a market need."e; 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.
Cover 1
Contents 6
Preface 10
About the author 12
Acknowledgements 14
1 Design 16
1.1 Introduction 16
1.2 The design process 17
1.2.1 Case study 19
1.3 Total design 20
1.4 Product design specification 24
1.5 Conceptual design 27
1.5.1 Boundary shifting 27
1.5.2 Brain-storming 27
1.5.3 Morphological analysis 28
1.5.4 Function trees 30
1.6 The technology base 31
1.7 Conclusions 33
2 Mechanical engineering 37
2.1 Introduction 37
2.2 Thermodynamics 40
2.2.1 Fluid mechanics 40
2.2.2 Heat transfer 41
2.3 Mechanics 42
2.4 Materials 42
2.4.1 Metals 43
2.4.2 Polymers and elastomers 43
2.4.3 Ceramics and glasses 44
2.4.4 Composites 44
2.5 Conclusions 44
3 Machine elements 45
3.1 Introduction 45
3.2 Tribology 46
3.3 Bearings 47
3.4 Gears, belts and chains 48
3.5 Seals 49
3.6 Clutches and brakes 50
3.7 Springs 51
3.8 Fasteners 51
3.9 Enclosures 52
3.10 Conclusions 53
4 Bearings 54
4.1 Introduction 54
4.2 Sliding bearings 55
4.2.1 Lubricants 58
4.2.2 Design of boundary lubricated bearings 58
4.2.3 Design of full film hydrodynamic bearings 61
4.2.4 Alternative method for the design of full film hydrodynamic bearings 74
4.3 Rolling contact bearings 78
4.3.1 Bearing life and selection 78
4.3.2 Bearing installation 84
4.4 Conclusions 86
5 Shafts 94
5.1 Introduction 94
5.2 Shaft–hub connection 97
5.3 Shaft–shaft connection – couplings 99
5.4 Critical speeds and shaft deflection 100
5.4.1 Macaulay’s method for calculating the deflection of beams 102
5.4.2 Castigliano’s theorem for calculating shaft deflections 108
5.5 ASME design code for transmission shafting 109
5.6 Conclusions 116
6 Gears 122
6.1 Introduction 122
6.2 Construction of gear tooth profiles 128
6.3 Gear trains 131
6.3.1 Manually shifted automotive transmissions 133
6.3.2 Epicyclic gear trains 133
6.4 Tooth systems 137
6.5 Force analysis 137
6.5.1 Introduction to gear stresses 138
6.5.2 Bending stresses 138
6.6 Simple gear selection procedure 139
6.7 Conclusions 148
7 Detailed gear stressing 152
7.1 Introduction 152
7.2 Wear failure 153
7.3 AGMA equations for bending and contact stress 154
7.4 Gear selection procedure 163
7.5 Conclusions 165
8 Belts and chain drives 169
8.1 Introduction 169
8.2 Belt drives 170
8.2.1 Belt selection 172
8.3 Chain drives 181
8.3.1 Roller chain selection 183
8.4 Conclusions 188
9 Seals 192
9.1 Introduction 192
9.2 Static seals 193
9.2.1 Elastomeric seal rings 193
9.2.2 Gaskets 196
9.2.3 Foodstuffs containers 196
9.3 Dynamics seals 197
9.3.1 Seals for rotating machinery 198
9.3.2 Seals for reciprocating components 202
9.4 Conclusions 203
10 Clutches and brakes 207
10.1 Introduction 207
10.2 Clutches 209
10.2.1 Design of disc clutches 211
10.3 Brakes 218
10.3.1 Disc brakes 221
10.3.2 Drum brakes 223
10.3.3 Short shoe external drum brakes 224
10.3.4 Long shoe external drum brakes 225
10.3.5 Long shoe internal drum brakes 229
10.3.6 Band brakes 232
10.4 Conclusions 235
11 Springs 240
11.1 Introduction 240
11.2 Helical compression springs 244
11.3 Helical extension springs 254
11.4 Helical torsion springs 256
11.5 Leaf springs 257
11.6 Belleville spring washers 259
11.7 Conclusions 262
12 Fastening and power screws 266
12.1 Introduction to permanent and non-permanent fastening 266
12.2 Threaded fasteners 266
12.3 Power screws 273
12.4 Rivets 276
12.5 Adhesives 282
12.6 Welding 285
12.7 Snap fasteners 285
12.8 Conclusions 287
13 Frames, casings and enclosures 290
13.1 Introduction 290
13.2 Designing to resist bending 291
13.3 Designing to resist torsion 293
13.4 Designing to provide adequate ventilation 294
13.5 Safety 296
13.6 Conclusions 296
14 Sensors and actuators 298
14.1 Introduction 298
14.2 Sensors 299
14.2.1 Position 299
14.2.2 Speed 300
14.2.3 Force 301
14.2.4 Torque 301
14.2.5 Temperature measurement 302
14.2.6 Pressure 304
14.2.7 Fluid flow 305
14.3 Actuators 306
14.3.1 Pneumatics and hydraulics 306
14.3.2 Electric motors 308
14.3.3 Electromagnets and solenoids 311
14.3.4 Piezoelectric actuators 311
14.4 Conclusions 312
15 Engineering tolerancing 314
15.1 Introduction 314
15.2 Component tolerances 314
15.2.1 Standard fits for holes and shafts 315
15.2.2 Interference fits 319
15.2.3 Machine capability 320
15.2.4 Geometric tolerancing 320
15.3 Statistical tolerancing 322
15.3.1 Sure-fit or extreme variability 324
15.3.2 Linear functions or tolerance chains 326
15.3.3 Several independent, uncorrelated random variables 328
15.3.4 Statistical design techniques and quality assurance 332
15.4 Conclusions 334
16 Design management and case study 337
16.1 Introduction 337
16.2 Management of design 341
16.2.1 Project management 342
16.2.2 Evaluation 343
16.3 Costing 344
16.3.1 Selling price 345
16.3.2 Allowable cost 345
16.3.3 Cost estimating 347
16.3.4 Accounts 348
16.4 A guide to design literature and sources of information 350
16.5 Case study 351
16.5.1 Brief 351
16.5.2 Specification 351
16.5.3 Conceptual solutions 355
16.5.4 Detailed design 356
16.6 Conclusions 361
Index 366
| Erscheint lt. Verlag | 4.12.2003 |
|---|---|
| Sprache | englisch |
| Themenwelt | Naturwissenschaften ► Chemie ► Technische Chemie |
| Technik ► Bauwesen | |
| Technik ► Fahrzeugbau / Schiffbau | |
| Technik ► Maschinenbau | |
| Technik ► Umwelttechnik / Biotechnologie | |
| ISBN-10 | 0-08-047342-3 / 0080473423 |
| ISBN-13 | 978-0-08-047342-0 / 9780080473420 |
| Haben Sie eine Frage zum Produkt? |
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