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Introduction to Engineering Graphics
Engineering Graphics use in many engineering discipline• Mechanical• Architecture• Electrical• Aerospace• Structural• Product Representation (3 –D drawing)
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Typical Branches ofEngineering Graphics
Mechanical
Power GenerationTransportationManufacturingPower ServicesAtomic EnergyMarine Vessels
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Typical Branches ofEngineering Graphics
Architectural
Commercial BuildingsResidential BuildingsInstitutional BuildingsEnvironmental Space Forms
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Typical Branches ofEngineering Graphics
Electrical
Power GenerationPower ApplicationTransportationIlluminationIndustrial ElectronicsCommunicationsInstrumentationMilitary Electronics
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Typical Branches ofEngineering Graphics
Aerospace
AerodynamicsStructural DesignInstrumentationPropulsion SystemsMaterialsReliability TestingProduction Methods
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Typical Branches ofEngineering Graphics
Piping
Liquid TransportationManufacturingPower ServicesHydraulicsPneumatics
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Typical Branches ofEngineering Graphics
Structural
Structural DesignsBuildingsPlanesShipsAutomobilesBridges
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Typical Branches ofEngineering Graphics
Technical Illustration
New ProductsAssembly InstructionsPresentationsCommunity ProjectsRenewal Programs
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Drawing Equipment
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Drafting Equipment
Drafting Machine
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Drafting Equipment
Triangles
45°
30°/60°
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Drafting Equipment
Adjustable Triangle
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Drafting Equipment
Protractors
Half-Circle
Full-Circle
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METRIC SCALE
1:1 SCALE (1mm DIVISIONS)
mm1:1
0 10 20 30 40 50 60 70 80
18 34 52.5
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METRIC SCALE
1:2 SCALE (2mm DIVISIONS)
mm1:2
0 20 40 60 80 100 120 140 160
348 53 115
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Drafting Equipment
Compasses
Drop Bow
Bow
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Drafting Equipment
Compasses
Beam
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Drafting Equipment
Wooden Pencil
Automatic Pencil
Mechanical Pencil
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Drafting Equipment
Erasers
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Drafting Equipment
Erasing Shield
Drafter’s Brush
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Drafting Equipment
Templates
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Drafting Equipment
Irregular Curves
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Drafting Equipment
Technical Pens
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Drawing as a LanguageBS308 Part 1 and Part 2
Consist of:• Types Of Lines, abbreviation, symbols, notations, values, etc
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LEADER
APPLICATION OF LINES
DIMENSION LINEEXTENSION LINE
HIDDEN LINE
BREAK LINE
VISIBLE LINE
CUTTING-PLANE LINE
CENTER LINE(PATH OF MOTION)
CENTER LINE
SECTIONLINE
PHANTOM LINE
VIEWING-PLANE LINE
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CIRCLES AND ARCS
ESTABLISH CENTER LINESDRAW CIRCLES AND ARCSCOMPLETE OBJECT LINES
Highlighting the center lines for circles – Extended the objects
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HIDDEN LINE TECHNIQUE
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DICTIONARY OF DRAFTING GEOMETRY
STRAIGHT LINE(SHORTEST DISTANCEBETWEEN TWO POINTS)
PARALLEL LINES
INTERSECTING LINES
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DICTIONARY OF DRAFTING GEOMETRY
RIGHT ANGLE ACUTE ANGLE OBTUSE ANGLE
COMPLEMENTARY ANGLE SUPPLEMENTARY ANGLE
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DICTIONARY OF DRAFTING GEOMETRY
EQUILATERAL TRIANGLEALL SIDES EQUAL LENGTH
ISOSCELES TRIANGLETWO SIDES EQUAL LENGTH
RIGHT TRIANGLE SCALENE TRIANGLE
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DICTIONARY OF DRAFTING GEOMETRY
CIRCLES
CONCENTRIC ECCENTRIC
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DICTIONARY OF DRAFTING GEOMETRY
SQUARE RECTANGLE RHOMBUS
RHOMBOID TRAPEZOID TRAPEZIUM
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DICTIONARY OF DRAFTING GEOMETRY
PENTAGON HEXAGON HEPTAGON OCTAGON
NONTAGON DECAGON DODECAGON
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DICTIONARY OF DRAFTING GEOMETRY
CUBE RIGHTRECTANGLE
RIGHTTRIANGULAR
PRISM
RIGHTTRIANGULAR
PYRAMID
RIGHTCYLINDER
RIGHTCONE
FRUSTUMOF ACONE
SPHERE
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PRACTICE BISECTING A LINE
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PRACTICE BISECTING AN ARC
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PRACTICE BISECTING AN ANGLE
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1-40
Figure 1.13 Practice Lettering
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PAPER SIZE
Paper size Border width (mm) Diamensions (mm)
a b
A0 20 20 1189X841
A1 20 20 841X594
A2 10 10 594X420
A3 10 10 420X297
A4 10 10 297X217
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Figure 1.15 – Paper sizes
(a)
(b)
Paper Border
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1-43
Figure 1.16 – Explain typical layout of a drawing sheet (suitable for detail drawings)
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1-44
Figure 1.17 – Explain typical layout of a drawing sheet (suitable for assembly and multi detail drawings)
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Assignment 1
Take home/Draw in Class