| Preface IX 1. Threaded Fastners and Power Screws 1 Introduction 1 Thread forms, terminology and standards 2 Static screw stresses 7 Fastners materials and methods of manufacturer 11 Defining threaded connections 17 Bolt tension with external joints–seprating force 19 2. Rivets, Welding and Bonding 22 Introduction 22 Rivets 23 Welded joints subjected to static axial and direct shear loading 30 Brazing and soldering 38 Adhesives 39 3. Springs 43 Introduction 43 Stress and strength analysis for helical compression springs–static loading 45 End design of helical compression springs 47 Design procedure for helical compression springs –static loading 49 Beam springs 51 Torsion springs 53 4. Lubrication and Sliding Bearings 56 Introduction 56 Types of lubricants 56 Types of sliding bearing 58 Types of lubrication 60 Basics concepts of hydrodynamics lubrication 62 Temperature and pressure effects on viscocity 67 Petroff’s equation for bearing fiction 68 Hydrodynamic lubrication theory 69 Design charts for hydrodynamic bearings 71 Lubricant supply 73 Heat dissipation and equilibrium oil film temperature 74 Bearing materials 74 Hydrodynamic bearing design 76 Boundary and mixed-film lubrication 77 Trust bearings 78 Elastohydrodynamic lubrication 79 5. Rolling-Element Bearing 83 Introduction 83 Comparison of alternative means for supporting rotating shafts 84 Types of rolling element bearing 86 Design of rolling-element bearings 88 “Catalogue information” for rolling-element bearings 90 Mounting bearings to provide properly for thrust load 91 6. Super Gears 97 Introduction 97 Geometry and nomenclature 98 Interference and contact ratio 99 Gear force analysis 104 Gear tooth strength 108 Basics analysis of gear –tooth-bending stress (lewis equation) 111 Refined analysis of gear –tooth-bending strength basic concepts 112 Gear-tooth surface durability –basics concepts 113 Gear-tooth surface fatigue analysis –recommended procedure 113 Spur gear design procedure 114 Gear materials 116 Gear trains 119 7. Helical, Bevel and Worm Gears 122 Introduction 122 Helical –gear geometry and nomenclature 123 Helical gear force analysis 126 Helical gear-tooth-bending and surface fatigue strength 129 Crossed helical gears 130 Bevel gear geometry and nomenclature 131 Bevel gear force analysis 132 Bevel gear tooth-bending and surface fatigue strength 133 Bevel gear trains: differential gear 133 Worm gear geometry and nomenclature 135 Worm gear thermal capacity 145 8. Shafts and Associated Parts 148 Introduction 148 Provision for-shaft bearings 148 Mounting parts onto rotating shaft 148 Rotating shaft dynamics 150 Overall shaft design 151 Keys, pins and splines 152 Couplings and universal joints 156 9. Clutches and Brakes 159 Introduction 159 Disk clutches 159 Disk brakes 161 Energy absorption and cooling 162 Cone clutches and brakes 163 Short-shoe drum brakes 165 External long-shoe drum brakes 165 Band brakes 167 Materials 167 10. Belts, Chains and Other Components 170 Introduction 170 Flat belts 170 V-belts 171 Toothed belts 174 Roller chains 177 Inverted-tooth chains 178 History of hydrodynamic drives 179 Fluid couplings 179 Hydrodynamic torque converters 182 11. Micro/Nanoscale Machine Elements 187 Introduction 187 Micro and nanoscale actuators 187 Micro and nanoscale bearings 188 Micro and nanoscale sensor 190 12. Machine Component Interrelationships-A Case Study 194 Introduction 194 Description of original hydromatic transmission 195 Description of original hydra-matic transmission 195 Free body diagram determination of gear ratios and component loads 200 Gear design considerations 201 Brake and clutch design considerations 202 Miscellaneous design considerations 204 Bibliography 208 Index 210 |
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