机械设计(英文版)

图书信息

作者：宋梅利,祖莉,梁医编

出版社：北京航空航天大学出版社

定价：79.00

ISBN：9787512431485

出版时间：2020-08-01

分类：图书,行业职业,工业技术,机械工程

商品介绍

目录

Chapter 1 Introduction 1

1.1 The Objectives and Tasks of the Course 1

1.2 Basic Requirements and Design Procedures 2

1.2.1 Basic requirements 2

1.2.2 Procedures for mechanical design 4

1.3 Failure Modes and Design Criteria 6

1.3.1 Failure modes of mechanical parts 6

1.3.2 Criteria for mechanical parts 6

1.4 Common Materials and Their Selection Principle of Mechanical Parts 8

1.4.1 Common materials of mechanical parts 9

1.4.2 Materials selection principle 11

1.5 Modern Mechanical Design Theories and Methods 12

Internet Resources 13

Problems 14

Chapter 2 Strength of Mechanical Parts 15

2.1 Introduction 15

2.2 Working Capacity Calculation Criteria for Mechanical Parts 16

2.2.1 Failure form of mechanical parts 16

2.2.2 Working capacity calculation criteria 16

2.3 Common Materials for Mechanical Parts and Their Selections 18

2.3.1 Common materials for mechanical parts 19

2.3.2 Principles for selecting mechanical parts materials 22

2.4 Load and Stress Acting on Parts 24

2.4.1 Classification of load 24

2.4.2 Classification of stress 24

2.5 Strength Calculation 25

2.5.1 Strength of mechanical parts under static stress 25

2.5.2 Fatigue strength calculation of mechanical parts 27

2.5.3 Contact strength of mechanical parts 32

Internet Resources 34

Problems 34

Chapter 3 Friction,Wear and Lubrication 36

3.1 Introduction 36

3.2 Friction 37

3.2.1 Dry friction 39

3.2.2 Boundary friction (boundary lubrication) 40

3.2.3 Mixed friction (mixed lubrication) 41

3.2.4 Fluid friction (fluid lubrication) 42

3.3 Wear 42

3.3.1 Typical wear process 42

3.3.2 Types of wear 43

3.4 Lubrication 45

3.4.1 Main properties of lubricants 46

3.4.2 Viscosity law 50

3.4.3 Introduction to fluid lubrication 51

Internet Resources 52

Problems 52

Chapter 4 Threaded Joints 53

4.1 Introduction 53

4.1.1 Thread formation 53

4.1.2 Types and applications of screw 53

4.1.3 Main parameters of the thread 56

4.2 Types of Threaded Joints and Standards 57

4.2.1 Types of threaded joints 57

4.2.2 Standard threaded couplings 59

4.3 Pre-tightening and Anti-looseness of Threaded Joints 61

4.3.1 Pre-tightening of threaded joints 61

4.3.2 Anti-looseness of threaded joints 64

4.4 Strength Calculation for the Single Threaded Joints 66

4.4.1 Strength calculation of loose bolt connections 66

4.4.2 Strength calculation of tight bolt connections 67

4.4.3 Material and allowable stress of threaded couplings 73

4.5 Design and Force Analysis of Bolt Group Connections 75

4.5.1 Structural design of bolt group connections 75

4.5.2 Force analysis of bolt group connections 76

Internet Resources 79

Problems 79

Machine Elements in Mechanical Design Project 82

Chapter 5 Axle and Hub Connections 83

5.1 Key Connections 83

5.1.1 Types and applications 83

5.1.2 Selection and the strength calculation 86

5.2 Spline Connections 90

5.2.1 The type,characteristics and application of spline connections 90

5.2.2 The strength calculation of spline connections 92

5.3 Pin Connections 93

Internet Resources 95

Problems 95

Project 95

Chapter 6 Rivetings,Weldings and Bondings 97

6.1 Rivetings 97

6.1.1 Rivet joints 97

6.1.2 Failure forms and design of rivetings 98

6.2 Weldings 99

6.2.1 Types,characteristics and applications of weldings 99

6.2.2 Failure modes of welding 99

6.2.3 Design of welding parts 100

6.3 Bondings 102

6.3.1 The applications of bondings 102

6.3.2 Adhesive joints 102

6.3.3 Adhesives 103

6.3.4 Comparisons of bondings,rivetings and weldings 104

Internet Resources 104

Problems 104

Chapter 7 Power Screws 105

7.1 Types,Characteristics and Applications of Power Screws 105

7.2 Sliding Power Screws 106

7.2.1 The structure of sliding power screws 106

7.2.2 Design calculation of sliding power screws 107

7.3 Ball Screws Drives 110

7.3.1 Structure types and characteristics 110

7.3.2 Design and calculation of ball screws drives 112

Internet Resources 113

Problems 113

Project 114

Chapter 8 Belt Drives 116

8.1 Types and Characteristics of Belt Drives 116

8.1.1 Working principle and characteristics of belt drives 116

8.1.2 Types and applications of belt drives 117

8.2 Analysis of Belt Drives 118

8.2.1 Force analysis of belt drives 118

8.2.2 Stress analysis of belts 120

8.2.3 Elastic slipping and creeping of belts 121

8.3 Design Calculation of Ordinary V-belt Drives 123

8.3.1 V-belt structures 123

8.3.2 Standard for ordinary V belts 124

8.3.3 Basic rated power of single V belt 125

8.3.4 Design steps and methods of V-belt drives 127

8.4 Design of V-belt Pulleys 132

8.4.1 Design requirements for V-belt pulleys 132

8.4.2 Materials of V-belt pulleys 132

8.4.3 Structure dimension of V-belt pulleys 132

8.5 Tension and Maintenance of Belt Drives 136

8.5.1 Tension of belts 136

8.5.2 Belt maintenance 137

8.6 Introduction of Other New Belt Drives 137

8.6.1 High speed belt drives 137

8.6.2 Toothed timing belt drives 138

8.6.3 V-ribbed belt drives 139

Internet Resources 139

Problems 139

Project 140

Chapter 9 Chain Drives 142

9.1 Introduction 142

9.2 Structure of Chains 143

9.2.1 Roller chains 143

9.2.2 Silent chains 145

9.3 Structure and Material of Sprockets 146

9.3.1 Basic parameters of sprockets 147

9.3.2 Sprocket tooth profile 148

9.3.3 Structure of sprockets 149

9.3.4 Material of sprockets 149

9.4 Geometric Parameters of Chain Drives 150

9.4.1 Number of pitches 150

9.4.2 Center distance 151

9.5 Motion Characteristics of Chain Drives 151

9.5.1 Kinematics of chain drives 151

9.5.2 Dynamical loads of chain drives 153

9.6 Load Analysis of Chain Drives 154

9.7 Failure Modes and Carrying Capacity of Chain Drives 155

9.7.1 The failure modes of chain drives 155

9.7.2 Carrying capacity of chain drives 156

9.8 Chain Drives Design 158

9.8.1 Design the pitch and number of strands 158

9.8.2 Design the number of teeth in two sprockets and speed ratio 160

9.8.3 Design the number of links and center distance 161

9.8.4 Design the structure of the small sprocket 161

9.9 Layouts,Tension and Lubrication of Chain Drives 162

9.9.1 Layout of chain drives 162

9.9.2 Tension of chain drives 162

9.9.3 Lubrication of chain drives 163

Internet Resources 165

Problems 166

Project 167

Chapter 10 Gear Drives 168

10.1 Introduction 168

10.2 The Failure Modes and Design Rules of Gear Drives 170

10.2.1 Failure modes of gears 170

10.2.2 Design criteria 173

10.3 Materials and Heat Treatment of Gears 174

10.3.1 Steel 175

10.3.2 Cast iron 176

10.3.3 Bronze 176

10.3.4 Nonmetallic material 176

10.4 The Calculated Load for Gear Drives 176

10.4.1 Application factor 177

10.4.2 Dynamic factor 177

10.4.3 Axial load distribution factor 178

10.4.4 Load distribution factor across teeth 182

10.5 Strength Calculation of Standard Spur Gears 183

10.5.1 Force analysis 183

10.5.2 Calculation of spur teeth bending fatigue strength 184

10.5.3 Calculation of spur teeth contact fatigue strength 186

10.5.4 Tips for gear strength calculation 189

10.6 Design Parameters,Permissible Stress and Accuracy Choice of Gears 190

10.6.1 Design parameters 190

10.6.2 Permissible stress 191

10.6.3 The degree of gear precision 196

10.7 Strength Calculation of Standard Helical Gears 201

10.7.1 Force analysis 201

10.7.2 Calculation of helical teeth bending fatigue strength 204

10.7.3 Calculation of helical teeth contact fatigue strength 205

10.8 Strength Calculation of Standard Bevel Gears 211

10.8.1 Force analysis 211

10.8.2 Calculation of bevel teeth bending fatigue strength 212

10.8.3 Calculation of bevel teeth contact fatigue strength 212

10.9 Strength Characteristic of Modified Gears 213

10.10 Structural Design of Gears 214

10.10.1 Gear shafts 215

10.10.2 Solid gears 215

10.10.3 Web gears 216

10.10.4 Gears with crossed spokes 217

10.10.5 Combined gears 217

10.11 Lubrication of Gear Drives 218

10.11.1 Lubrication method 218

10.11.2 Lubricant selection 219

Internet Resources 220

Problems 220

Projects 222

Chapter 11 Worm Gear Transmission 224

11.1 Summary 224

11.1.1 The types of worm transmission 224

11.1.2 The characteristics of worm transmission 225

11.2 The Main Parameters and Geometric Dimensions of Common Cylindrical Worm Transmission 225

11.2.1 Main parameters of common cylindrical worm transmission 225

11.2.2 Geometric dimension calculation of worm transmission 229

11.3 Motion and Force Analysis of Worm Transmission 230

11.3.1 Motion analysis of worm transmission 230

11.3.2 Force analysis of worm transmission 231

11.4 The Failure Mode,Material and Structure of Worm Transmission 232

11.4.1 Failure forms and design criteria of worm transmission 232

11.4.2 Common materials for worm transmission 233

11.4.3 The structure of common cylindrical worm and worm wheel 233

11.5 Strength analysis of worm transmission 234

11.6 Calculation of Efficiency,Lubrication and Thermal Balance of Worm Transmission 236

11.6.1 The efficiency of worm transmission 236

11.6.2 Heat balance calculation of worm transmission 238

Internet Resources 241

Problems 241

Project 243

Chapter 12 Shafts 244

12.1 Introduction 244

12.1.1 Application and classification of shafts 244

12.1.2 Shaft materials 246

12.1.3 Introduction of design content 248

12.2 Structural Design of Shafts 249

12.2.1 The arrangement of parts on the shaft 249

12.2.2 Positioning of parts on the shaft 250

12.2.3 Determine the diameter and length of shaft segments 253

12.2.4 Processability of shaft structure 254

12.3 Strength Calculation of Shafts 254

12.3.1 Torsional strength 254

12.3.2 Bending and torsional strength 256

12.3.3 Safety factor 258

12.4 Stiffness and Vibration Stability of Shafts 259

12.4.1 Stiffness of shafts 259

12.4.2 Vibration stability and critical speed of shafts 260

12.5 Measures to Improve the Strength and Stiffness of Shafts 268

12.5.1 Reduce the stress concentration on shafts 268

12.5.2 Arrange parts on the shaft to reduce load on shafts 269

12.5.3 Improve parts structure to reduce load on shafts 270

12.5.4 Choose a proper loading mode to reduce load on shafts 270

12.5.5 Improve the surface quality to enhance the fatigue strength of shafts 271

Internet Resources 271

Problems 271

Project 273

Chapter 13 Sliding Bearings 275

13.1 Introduction 275

13.2 Type and Structure of Sliding Bearings 276

13.2.1 The classification of sliding bearings 276

13.2.2 The main structural form of radial sliding bearings 277

13.3 Sliding Bearing Material and Bearing Structure 279

13.3.1 The material of the sliding bearings 279

13.3.2 Bearing structure 283

13.4 Lubrication of Sliding Bearings 285

13.4.1 The selection of lubricant 285

13.4.2 Lubrication methods 288

13.5 Calculation of Non-liquid-lubricated Sliding Bearings 289

13.5.1 Radial sliding bearings 290

13.5.2 Thrust sliding bearings 291

13.6 Design and Calculation of Hydrodynamic Lubrication Radial Sliding Bearings 292

13.6.1 Basic equation of fluid dynamic lubrication 292

13.6.2 Oil wedge bearing mechanism 294

13.6.3 Establishment process of liquid dynamic lubrication state 295

13.6.4 Geometric relations and bearing capacity of radial sliding bearings 295

13.6.5 Bearing parameter selection 299

13.7 Introduction to Other Types of Sliding Bearings 300

13.7.1 Multi-oil wedge sliding bearings 300

13.7.2 Hydro-static bearings 302

13.7.3 Gas bearings 303

13.7.4 Magnetic bearings 303

Internet Resources 304

Problems 304

Chapter 14 Rolling-Element Bearings 306

14.1 Introduction 306

14.1.1 Structure of rolling-element bearings 306

14.1.2 Material of rolling-element bearings 307

14.1.3 Characteristics of rolling-element bearings 307

14.2 Types and Selection of Rolling-Element Bearings 308

14.2.1 Types and characteristics of rolling-element bearings 308

14.2.2 Code of rolling-element bearings 311

14.2.3 Selection of rolling-element bearings 314

14.3 Force Analysis,Failure Modes and Calculation Criterion of Rolling-Element Bearings 315

14.3.1 Load distribution of rolling-element bearings 315

14.3.2 Load and stress of bearing elements 319

14.3.3 Failure modes and calculation criteria of rolling-element bearings 320

14.4 Dynamic Load and Life Calculation of Rolling Bearings 321

14.4.1 Basic rating life and basic dynamic load rating 321

14.4.2 Dynamic equivalent load 321

14.4.3 Fatigue life calculation of rolling bearings 322

14.4.4 Thrust load calculation of angular contact ball bearings and tapered roller bearings 323

14.5 Limit Speed of Rolling Bearings 325

14.6 Combined Structural Design of Rolling Bearings 328

14.6.1 Mounting arrangement of rolling bearings 329

14.6.2 Axial fixation of rolling bearings 330

14.6.3 Stiffness of the supporting structure and concentricity of the housing hole 332

14.6.4 Adjustment of rolling bearing clearance and axial position of the shaft 332

14.6.5 Rolling bearing fit 333

14.6.6 Preloading of rolling bearings 334

14.6.7 Assembly and disassembly of rolling bearings 335

14.6.8 Lubrication of rolling bearings 336

14.6.9 Seals of rolling bearings 337

Internet Resources 339

Problems 339

Project 340

Chapter 15 Couplings,Clutches and Brakes 342

15.1 Introduction 342

15.2 Couplings 343

15.2.1 Type,structure and characteristics of couplings 343

15.2.2 Coupling selection 350

15.3 Clutches 352

15.3.1 Mechanical clutches 352

15.3.2 Safety clutches 355

15.4 Brakes 355

15.4.1 Band brakes 355

15.4.2 Disc brakes 356

Internet Resources 356

Problems 356

Project 357

Appendix Glossary and Index 358

References 371

内容简介

本书主要介绍关于机械和机械设计的基本概念，机械运动设计、机械零部件工作能力设计和结构设计，常用的机构和机械传动及其设计，以及机械动力学的基础知识，连接件和轴系零部件。本书适用对象：机械设计及理论、机电工程、机械制造及自动化、车辆工程等专业的本科生。