Basic Engineering Drawing

Basic Engineering Drawing
R S RHODES
M Weld J, Diploma in Advanced Studies in Education.
Lecturer responsible for Engineering Drawing
Stafford College of Further Education.
L B COOK
B A (Hons), MIED, Cert Ed.
Lecturer in Engineering Drawing
Stafford College of Further Education.
Contents
ORTHOGRAPHIC PROJECTION 1
ORTHOGRAPHIC PROJECTION: FIRST ANGLE 2
Lines • 5
Missing detail • 11
Missing views • 12
Sketching orthographic views • 13
ORTHOGRAPHIC PROJECTION: THIRD ANGLE 14
Comparison of first and third angle projection • 15
SECTIONING 21
The rules of sectioning • 22
Sectioning : exceptions • 23
Staggered section planes • 24
Exercises • 25
TERMINOLOGY 33
ABBREVIATIONS 36
CONVENTIONAL REPRESENTATION 38
Screw threads • 38
Springs • 39
Shaft details • 40
Knurling • 41
Bearings • 41
Long components • 42
Gears • 43
TESTS 45
Test for terminology • 45
Test for abbreviations • 46
Test for conventional representations • 47
Test for abbreviations > terminology j and
conventional representations • 48PICTORIAL DRAWING 49
PICTORIAL DRAWING: ISOMETRIC 50
Inclined edges • 51
Exercises • 52
Construction of ellipses • 55
Examples • 5 7
Exercises • 58
Isometric freehand drawing • 59
PICTORIAL DRAWING: OBLIQUE 61
Methods of construction • 62
Inclined edges • 63
Methods of constructing oblique circles • 64
Methods of constructing oblique ellipses • 65
Examples • 66
DIMENSIONING 68
Arrangement of dimensions * 72
Dimensioning circles • 73
Dimensioning radii • 74
Dimensioning angles • 75
Designation of plain holes • 76
Location dimensions • 77
Exercises • 78
LIMITS AND FITS FOR HOLES AND SHAFTS 84
Limit systems • 86
Fit • 87
Conventional method of illustrating terms • 89
ISO METRIC SCREW THREADS 91
Designation • 92
Screw threads
3 nuts and bolts • 93
Nuts and bolts exercises • 94
ASSEMBLY DRAWINGS 95
General assembly • 96
Sectioned assembly • 98
Exercises • 99
DEVELOPMENTS 105
PARALLEL LINE DEVELOPMENT 106
RADIAL LINE DEVELOPMENT 120
Pyramids • 120
Right cones • 124
TRIANGULATION 130SOLUTIONS 136
First angle orthographic projection • 137
Third angle orthographic projection – 140
Sectioning • 144
Terminology 3 abbreviations 3 conventional representation • 148
Isometric drawing • 149
Oblique drawing • 153
Dimensioning • 155
Limits and fits • 161
Sectioned assemblies • 162
Developments: parallel line • 165
Developments : radial line • 172
Developments : triangulation • 180

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