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Manual of Engineering Drawing, 3rd Edition

Name: Manual of Engineering Drawing, 3rd Edition
ISBN: 9780080943626

by Colin H. Simmons, Dennis E. Maguire

March 2009

Intermediate to advanced

336 pages

15h 31m

English

Butterworth-Heinemann

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Brief Table of Contents
Table of Contents
Copyright
Preface
Acknowledgements
Chapter 1. Drawing office management and organization
Engineering drawing practicesDrawing practice and the computer (CAD: Computer aided draughting and design)Why introduce BS 8888 and withdraw BS 308?
Chapter 2. Product development and computer aided design
Computer aided draughting and designTechnical product documentationAccess into the computer networkQuality assurance
Chapter 3. CAD organization and applications
Computer and software purchaseProject developmentParametric designSheet metalwork applicationPipework systemsCommunicating design concepts
Chapter 4. Principles of first and third angle orthographic projection
First angle projectionThird angle projectionProjection symbolsDrawing procedureReading engineering drawingsProjection exercises4.1. Straight line examples4.2. Examples involving radii and holes (Fig. 4.18)4.3. Examples with missing lines (first angle projection) (Fig. 4.19)4.4. Examples with missing views (first angle projection) (Fig. 4.20)4.5. First angle projection examples with plotted curves (Fig. 4.22)4.6. Pictorial sketching from orthographic views4.7. Geometric solids in third angle projection4.8. Sectional views in third angle projection4.9. Dimensioning examples (first angle projection)
Chapter 5. Linework and lettering
Drawing paper sizesPresentationTypes of line and their applicationChain linesCoinciding linesLetteringDrawing modificationsCare and storage of original drawings

Chapter 6. Three-dimensional illustrations using isometric and oblique projection
Isometric projectionOblique projection
Chapter 7. Drawing layouts and simplified methods
Single-part drawingCollective single-part drawingsAssembly drawingsCollective assembly drawingDesign layout drawingsCombined detail and assembly drawingsExploded assembly drawingsSimplified drawingsMachine drawingDrawing scalesScale used in geometric constructionAbbreviations
Chapter 8. Sections and sectional views
Half sectionsRevolved sectionsRemoved sectionsSections through thin materialLocal sectionsComponents not drawn in sectionSuccessive sectionsSections in two parallel planes
Chapter 9. Geometrical constructions and tangency
To bisect a given angle AOB (Fig. 9.1)To bisect a given straight line AB (Fig. 9.2)To bisect a given arc AB (Fig. 9.3)To find the centre of a given arc AB (Fig. 9.4)To inscribe a circle in a given triangle ABC (Fig. 9.5)To circumscribe a circle around triangle ABC (Fig. 9.6)To draw a hexagon, given the distance across the flats (Fig. 9.8)To draw a regular octagon, given the distance across corners (Fig. 9.9)To draw a regular octagon, given the distance across the flats (Fig. 9.10)To draw a regular polygon, given the length of the sides (Fig. 9.11)TangencyTo draw a tangent to a point A on the circumference of a circle, centre O (Fig. 9.13)To draw a tangent to a circle from any given point A outside the circle (Fig. 9.14)To draw an external tangent to two circles (Fig. 9.15)To draw an internal tangent to two circles (Fig. 9.16)To draw internal and external tangents to two circles of equal diameter (Fig. 9.17)To draw a curve of given radius to touch two circles when the circles are outside the radius (Fig. 9.18)To draw a curve of given radius to touch two circles when the circles are inside the radius (Fig. 9.19)To draw a radius to join a straight line and a given circle (Fig. 9.20)To draw a radius which is tangential to given straight lines (Fig. 9.21)
Chapter . Loci applications
Methods of drawing an ellipseThe involuteArchimedean spiralRight-hand cylindrical helixRight-hand conical helixThe cycloidThe epicycloidThe hypocycloid
Chapter . True lengths and auxiliary views
Chapter . Conic sections and interpenetration of solids
To draw an ellipse from part of a coneTo draw a parabola from part of a coneTo draw a rectangular hyperbola from part of a coneInterpenetration
Chapter . Development of patterns from sheet materials
Chapter 14. Dimensioning principles
Dimensioning of features not drawn to scaleChain dimensioning and auxiliary dimensioningParallel dimensioningRunning dimensioningStaggered dimensionsDimensioning circlesDimensioning radiiDimensioning spherical radii and diametersDimensioning curvesDimensioning irregular curvesUnidirectional and aligned dimensionsAngular dimensionsTapersDimensioning tapersDimensioning two mating tapersDimensioning chamfersDimensioning squares or flatsDimensioning holesDimensioning counterboresDimensioning countersunk holesDimensioning spotfacesDimensioning for manufacture
Chapter . Screw threads and conventional representations
Screw threadsThreads for power transmissionDraughting conventions associated with threadsMultiple threadsThe application of thread conventionsTapping drillClearance drill
Chapter 16. Nuts, bolts, screws and washers
Drawing nuts and boltsApproximate construction for nuts and bolts (Figs. 16.2 and 16.3)Machine screwsMachine screw nutsWing nutsLocking and retaining devicesThread-cutting screws
Chapter . Keys and key ways
Sunk keysWoodruff keysDimensioning keyways (parallel keys)
Chapter 18. Worked examples in machine drawing
Bushed bearing bracketDrill tableCam operated clampPlug cock18.1. Air engineToolboxSolution notes
Chapter . Limits and fits
Elements of interchangeable systems (Fig. 19.9)Unilateral and bilateral limitsBases of fitsSelected ISO fits – hole basis (extracted from BS 4500)Interpretations of limits of size in relation to form
Chapter 20. Geometrical tolerancing and datums
Geometrical tolerancesDatumsDimensioning and tolerancing non-rigid parts
Chapter 21. Application of geometrical tolerances
StraightnessFlatnessCircularity (roundness)CylindricityProfile tolerance of a lineProfile tolerance of a surfaceParallelismPerpendicularity (squareness)AngularityCircular run-outTotal run-outPositionConcentricity and coaxialitySymmetry
Chapter . Maximum material and least material principles
Maximum material condition (MMC)Least material condition (LMC)Maximum material condition related to geometrical formMaximum material condition applied to straightnessMaximum material condition applied to squarenessMaximum material condition applied to positionMaximum material condition applied to coaxialityMaximum material condition and perfect formThe application of maximum material condition and its relationship with perfect form and squarenessThe application of maximum material condition and its relationship with perfect form and coaxialityThe application of maximum material condition to two mating components
Chapter 23. Positional tolerancing
Theoretically exact dimensioning (TED) (true-position)
Chapter 24. Surface texture
Graphical symbols to indicate surface textureExpanded graphical symbolsComplete graphical symbols‘All surfaces around a workpiece’ graphical symbolComposition of complete graphical symbols for surface textureMandatory positions for complementary requirements
Chapter 25. 3D annotation
Axis or median featureProjected tolerance zoneIndicating a tolerance zone between two pointsUnilateral and unequal profile toleranceIndicating the direction of tolerance zones
Chapter . The Duality Principle—the essential link between the design intent and the verification of the end product
IntroductionDesign specification and verificationAdvantages of the Duality Principle
Chapter 27. Differences between American ASME Y 14.5M Geometric dimensioning and tolerancing (GD & T) and ISO/BS 8888 geometrical tolerancing, standards
Applicability of standardsSymbologySpecification of datumsExclusion of surface textureTolerancing principleFeatures-of-sizeTolerance characteristics (Table 27.4)
Chapter 28. Cams and gears
Cam followersCam follower motionsDimensioning camsSpur gearsSpur-gear terms (Fig. 28.15)Involute gear teeth proportions and relationshipsTypical example using Professor Unwin's approximate constructionHelical gearsBevel gearsBevel-gear terms and definitionsWorm gearing
Chapter 29. Springs
Plain-carbon steelsAlloy steelsStainless steelsHigh-nickel alloysCopper-base alloysCompression springsFlat springsTorsion springsLeaf springsHelical extension springsDisc springsSpring specificationsWire formsCorrosion preventionFatigue conditions
Chapter . Welding and welding symbols
The application of welding symbols to working drawingsDimensioning of welds
Chapter 31. Engineering diagrams
General engineering graphical symbolsEngineered systemsHeating, ventilation and air conditioning systemsRefrigeration systems and energy-saving applicationsPneumatic systemsPneumatics and electronics
Chapter 32. Bearings and applied technology
Plain bearingsBall and roller bearingsApplication of bearingsSealsLubricationGeneral convention and simplified representation
Chapter 33. Engineering adhesives
Designing for adhesivesThe bond lineTypical bonded jointsEngineering applicationsInstant adhesivesStructural applications
Chapter 34. Related standards
The British Standards InstitutionInternational Organization for Standardization (ISO)
Chapter 35. Production drawings
Further standards for design, project and risk management of interest to engineers and manufacturers
Chapter 36. Drawing solutions
Index
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Content preview from Manual of Engineering Drawing, 3rd Edition

Chapter 20. Geometrical tolerancing and datums

Geometrical tolerances

The object of this section is to illustrate and interpret in simple terms the advantages of calling for geometrical tolerances on engineering drawings, and also to show that, when correctly used, they ensure that communications between the drawing office and the workshop are complete and incapable of misinterpretation, regardless of any language barrier.

Applications

Geometrical tolerances are applied over and above normal dimensional tolerances when it is necessary to control more precisely the form or shape of some feature of a manufactured part, because of the particular duty that the part has to perform. In the past, the desired qualities would have been obtained by adding ...

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Manual of Engineering Drawing, 3rd Edition

by Colin H. Simmons, Dennis E. Maguire