Mechanical Design ( 2 )

Publication series ：2

Author： Maekawa K.;Obikawa T.;Yamane Y.

Publisher： Elsevier Science‎

Publication year： 2003

E-ISBN: 9780080473420

P-ISBN(Paperback): 9780750657716

P-ISBN(Hardback): 9780750657716

Subject： TH122 Mechanical Design

Language： ENG

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Description

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

Chapter

1.2 The design process

1.2.1 Case study

1.3 Total design

1.4 Product design specification

1.5 Conceptual design

1.5.1 Boundary shifting

1.5.2 Brain-storming

1.5.3 Morphological analysis

1.5.4 Function trees

1.6 The technology base

1.7 Conclusions

2 Mechanical engineering

2.1 Introduction

2.2 Thermodynamics

2.2.1 Fluid mechanics

2.2.2 Heat transfer

2.3 Mechanics

2.4 Materials

2.4.1 Metals

2.4.2 Polymers and elastomers

2.4.3 Ceramics and glasses

2.4.4 Composites

2.5 Conclusions

3 Machine elements

3.1 Introduction

3.2 Tribology

3.3 Bearings

3.4 Gears, belts and chains

3.5 Seals

3.6 Clutches and brakes

3.7 Springs

3.8 Fasteners

3.9 Enclosures

3.10 Conclusions

4 Bearings

4.1 Introduction

4.2 Sliding bearings

4.2.1 Lubricants

4.2.2 Design of boundary lubricated bearings

4.2.3 Design of full film hydrodynamic bearings

4.2.4 Alternative method for the design of full film hydrodynamic bearings

4.3 Rolling contact bearings

4.3.1 Bearing life and selection

4.3.2 Bearing installation

4.4 Conclusions

5 Shafts

5.1 Introduction

5.2 Shaft–hub connection

5.3 Shaft–shaft connection – couplings

5.4 Critical speeds and shaft deflection

5.4.1 Macaulay’s method for calculating the deflection of beams

5.4.2 Castigliano’s theorem for calculating shaft deflections

5.5 ASME design code for transmission shafting

5.6 Conclusions

6 Gears

6.1 Introduction

6.2 Construction of gear tooth profiles

6.3 Gear trains

6.3.1 Manually shifted automotive transmissions

6.3.2 Epicyclic gear trains

6.4 Tooth systems

6.5 Force analysis

6.5.1 Introduction to gear stresses

6.5.2 Bending stresses

6.6 Simple gear selection procedure

6.7 Conclusions

7 Detailed gear stressing

7.1 Introduction

7.2 Wear failure

7.3 AGMA equations for bending and contact stress

7.4 Gear selection procedure

7.5 Conclusions

8 Belts and chain drives

8.1 Introduction

8.2 Belt drives

8.2.1 Belt selection

8.3 Chain drives

8.3.1 Roller chain selection

8.4 Conclusions

9 Seals

9.1 Introduction

9.2 Static seals

9.2.1 Elastomeric seal rings

9.2.2 Gaskets

9.2.3 Foodstuffs containers

9.3 Dynamics seals

9.3.1 Seals for rotating machinery

9.3.2 Seals for reciprocating components

9.4 Conclusions

10 Clutches and brakes

10.1 Introduction

10.2 Clutches

10.2.1 Design of disc clutches

10.3 Brakes

10.3.1 Disc brakes

10.3.2 Drum brakes

10.3.3 Short shoe external drum brakes

10.3.4 Long shoe external drum brakes

10.3.5 Long shoe internal drum brakes

10.3.6 Band brakes

10.4 Conclusions

11 Springs

11.1 Introduction

11.2 Helical compression springs

11.3 Helical extension springs

11.4 Helical torsion springs

11.5 Leaf springs

11.6 Belleville spring washers

11.7 Conclusions

12 Fastening and power screws

12.1 Introduction to permanent and non-permanent fastening

12.2 Threaded fasteners

12.3 Power screws

12.4 Rivets

12.5 Adhesives

12.6 Welding

12.7 Snap fasteners

12.8 Conclusions

13 Frames, casings and enclosures

13.1 Introduction

13.2 Designing to resist bending

13.3 Designing to resist torsion

13.4 Designing to provide adequate ventilation

13.5 Safety

13.6 Conclusions

14 Sensors and actuators

14.1 Introduction

14.2 Sensors

14.2.1 Position

14.2.2 Speed

14.2.3 Force

14.2.4 Torque

14.2.5 Temperature measurement

14.2.6 Pressure

14.2.7 Fluid flow

14.3 Actuators

14.3.1 Pneumatics and hydraulics

14.3.2 Electric motors

14.3.3 Electromagnets and solenoids

14.3.4 Piezoelectric actuators

14.4 Conclusions

15 Engineering tolerancing

15.1 Introduction

15.2 Component tolerances

15.2.1 Standard fits for holes and shafts

15.2.2 Interference fits

15.2.3 Machine capability

15.2.4 Geometric tolerancing

15.3 Statistical tolerancing

15.3.1 Sure-fit or extreme variability

15.3.2 Linear functions or tolerance chains

15.3.3 Several independent, uncorrelated random variables

15.3.4 Statistical design techniques and quality assurance

15.4 Conclusions

16 Design management and case study

16.1 Introduction

16.2 Management of design

16.2.1 Project management

16.2.2 Evaluation

16.3 Costing

16.3.1 Selling price

16.3.2 Allowable cost

16.3.3 Cost estimating

16.3.4 Accounts

16.4 A guide to design literature and sources of information

16.5 Case study

16.5.1 Brief

16.5.2 Specification

16.5.3 Conceptual solutions

16.5.4 Detailed design

16.6 Conclusions

Index

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