Manual of Engineering Drawing (eBook)

Cover 1
Contents 1
Preface 1
Acknowledgements 1
1. Drawing office management and organization 12
Engineering drawing practices 1
Drawing practice and the computer (CAD: Computer aided draughting and design) 1
Why introduce BS 8888 and withdraw BS 308? 1
2. Product development and computer aided design 18
Computer aided draughting and design 1
Technical product documentation 1
Access into the computer network 1
Quality assurance 1
3. CAD organization and applications 24
Computer and software purchase 1
Project development 1
Parametric design 1
Sheet metalwork application 1
Pipework systems 1
Communicating design concepts 1
Typical AutoCAD drawings 1
MechSoft 1
4. Principles of first and third angle orthographic projection 44
First angle projection 1
Third angle projection 1
Projection symbols 1
Drawing procedure 1
Reading engineering drawings 1
Projection exercises 1
5. Linework and lettering 56
Drawing paper sizes 1
Presentation 1
Lines and linework 1
Chain lines 1
Lettering 1
Drawing modifications 1
Care and storage of original drawings 1
6. Three dimensional illustrations using isometric and oblique projection 61
Isometric projection 1
Oblique projection 1
7. Drawing layouts and simplified methods 65
Single-part drawing 1
Collective single-part drawings 1
Assembly drawings 1
Collective assembly drawing 1
Design layout drawings 1
Combined detail and assembly drawings 1
Exploded assembly drawings 1
Simplified drawings 1
Machine drawing 1
Drawing scales 1
Scale used in geometric construction 1
Abbreviations 1
8. Sections and sectional views 75
Half sections 1
Revolved sections 1
Removed sections 1
Sections through thin material 1
Local sections 1
Components not drawn in section 1
Successive sections 1
Sections in two parallel planes 1
9. Geometrical constructions and tangency 79
Tangency 1
10. Loci applications 84
Methods of drawing an ellipse 1
The involute 1
Archimedean spiral 1
Right-hand cylindrical helix 1
Right-hand conical helix 1
The cycloid 1
The epicycloid 1
The hypocycloid 1
11. True lengths and auxiliary views 93
12. Conic sections and interpenetration of solids 98
To draw an ellipse from part of a cone 1
To draw a parabola from part of a cone 1
To draw a rectangular hyperbola from part of a cone 1
Interpenetration 1
13. Development of patterns from sheet materials 104
14. Dimensioning principles 111
Dimensioning of features not drawn to scale 1
Chain dimensioning and auxiliary dimensioning 1
Parallel dimensioning 1
Running dimensioning 1
Staggered dimensions 1
Dimensioning circles 1
Dimensioning radii 1
Dimensioning spherical radii and diameters 1
Dimensioning curves 1
Dimensioning irregular curves 1
Unidirectional and aligned dimensions 1
Angular dimensions 1
Tapers 1
Dimensioning tapers 1
Dimensioning chamfers 1
Dimensioning squares or flats 1
Dimensioning holes 1
Dimensioning counterbores 1
Dimensioning countersunk holes 1
Dimensioning spotfaces 1
Dimensioning for manufacture 1
Graphical symbols to indicate surface texture 1
Expanded graphical symbols 1
Complete graphical symbols 1
‘All surfaces around a workpiece’ graphical symbol 1
Composition of complete graphical symbols for surface texture 1
Mandatory positions for complementary requirements 1
15. Screw threads and conventional representations 125
Screw threads 1
Threads for power transmission 1
Draughting conventions associated with threads 1
Multiple threads 1
The application of thread conventions 1
Tapping drill 1
Clearance drill 1
16. Nuts, bolts, screws and washers 131
Drawing nuts and bolts 1
Approximate construction for nuts and bolts (Figs 16.2 and 16.3) 1
Machine screws 1
Machine screw nuts 1
Wing nuts 1
Locking and retaining devices 1
Thread-cutting screws 1
17. Keys and keyways 145
Sunk keys 1
Woodruff keys 1
Dimensioning keyways (parallel keys) 1
18. Worked examples in machine drawing 148
1 Bushed bearing bracket 1
2 Drill table 1
3 Cam operated clamp 1
4 Plug cock 1
5 Air engine 1
6 Toolbox 1
Solution notes 1
19. Limits and fits 164
Elements of interchangeable systems (Fig. 19.9) 1
Unilateral and bilateral limits 1
Bases of fits 1
Selected ISO fits„hole basis (extracted from BS 4500) 1
Interpretations of limits of size in relation to form 1
20. Geometrical tolerancing and datums 171
Geometrical tolerances 1
Datums 1
Dimensioning and tolerancing non-rigid parts 1
21. Application of geometrical tolerances 179
Straightness 1
Flatness 1
Circularity (roundness) 1
Cylindricity 1
Profile tolerance of a line 1
Profile tolerance of a surface 1
Parallelism 1
Perpendicularity (Squareness) 1
Angularity 1
Circular run-out 1
Total runout 1
Position 1
Concentricity and coaxiality 1
Symmetry 1
22. Maximum material and least material principles 190
Maximum material condition (MMC) 1
Least material condition (LMC) 1
Maximum material condition related to geometrical form 1
Maximum material condition applied to straightness 1
Maximum material condition applied to squareness 1
Maximum material condition applied to position 1
Maximum material condition applied to coaxiality 1
Maximum material condition and perfect form 1
The application of maximum material condition and its relationship with perfect form and squareness 1
The application of maximum material condition and its relationship with perfect form and coaxiality 1
The application of maximum material condition to two mating components 1
23. Positional tolerancing 197
True-position (theoretical exact) dimensioning 1
24. Cams and gears 201
Cam followers 1
Cam follower motions 1
Dimensioning cams 1
Spur gears 1
Spur-gear terms (Fig. 24.15) 1
Involute gear teeth proportions and relationships 1
Typical example using Professor Unwin’s approximate construction 1
Helical gears 1
Bevel gears 1
Bevel-gear terms and definitions 1
Worm gearing 1
25. Springs 213
Plain-carbon steels 1
Alloy steels 1
Stainless steels 1
High-nickel alloys 1
Copper-base alloys 1
Compression springs 1
Flat springs 1
Torsion springs 1
Leaf springs 1
Helical extension springs 1
Disc springs 1
Spring specifications 1
Wire forms 1
Corrosion prevention 1
Fatigue conditions 1
26. Welding and welding symbols 221
The application of welding symbols to working drawings 1
27. Engineering diagrams 225
General engineering graphical symbols 1
Engineered systems 1
Heating, ventilation and air conditioning systems 1
Refrigeration systems and energy-saving applications 1
Pneumatic systems 1
Pneumatics and electronics 1
28. Bearings and applied technology 260
Plain bearings 1
Ball and roller bearings 1
Application of bearings 1
Seals 1
Lubrication 1
General convention and simplified representation 1
29. Engineering adhesives 275
Designing for adhesives 1
The bond line 1
Typical bonded joints 1
Engineering applications 1
Instant adhesives 1
Structural applications 1
30. Related standards 283
The British Standards Institution 1
International Organization for Standardization (ISO) 1
31. Production drawings 293
Further Standards for design, project and risk management of interest to engineers and manufacturers 1
32. Drawing solutions 302
Index 1