Post on 11-Jan-2016
Introduction to Engineering Graphics
Engineering Graphics use in many engineering discipline• Mechanical• Architecture• Electrical• Aerospace• Structural• Product Representation (3 –D drawing)
Typical Branches ofEngineering Graphics
Mechanical
Power GenerationTransportationManufacturingPower ServicesAtomic EnergyMarine Vessels
Typical Branches ofEngineering Graphics
Architectural
Commercial BuildingsResidential BuildingsInstitutional BuildingsEnvironmental Space Forms
Typical Branches ofEngineering Graphics
Electrical
Power GenerationPower ApplicationTransportationIlluminationIndustrial ElectronicsCommunicationsInstrumentationMilitary Electronics
Typical Branches ofEngineering Graphics
Aerospace
AerodynamicsStructural DesignInstrumentationPropulsion SystemsMaterialsReliability TestingProduction Methods
Typical Branches ofEngineering Graphics
Piping
Liquid TransportationManufacturingPower ServicesHydraulicsPneumatics
Typical Branches ofEngineering Graphics
Structural
Structural DesignsBuildingsPlanesShipsAutomobilesBridges
Typical Branches ofEngineering Graphics
Technical Illustration
New ProductsAssembly InstructionsPresentationsCommunity ProjectsRenewal Programs
Drawing Equipment
Drafting Equipment
Drafting Machine
Drafting Equipment
Triangles
45°
30°/60°
Drafting Equipment
Adjustable Triangle
Drafting Equipment
Protractors
Half-Circle
Full-Circle
METRIC SCALE
1:1 SCALE (1mm DIVISIONS)
mm1:1
0 10 20 30 40 50 60 70 80
18 34 52.5
METRIC SCALE
1:2 SCALE (2mm DIVISIONS)
mm1:2
0 20 40 60 80 100 120 140 160
348 53 115
Drafting Equipment
Compasses
Drop Bow
Bow
Drafting Equipment
Compasses
Beam
Drafting Equipment
Wooden Pencil
Automatic Pencil
Mechanical Pencil
Drafting Equipment
Erasers
Drafting Equipment
Erasing Shield
Drafter’s Brush
Drafting Equipment
Templates
Drafting Equipment
Irregular Curves
Drafting Equipment
Technical Pens
Drawing as a LanguageBS308 Part 1 and Part 2
Consist of:• Types Of Lines, abbreviation, symbols, notations, values, etc
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
CIRCLES AND ARCS
ESTABLISH CENTER LINESDRAW CIRCLES AND ARCSCOMPLETE OBJECT LINES
Highlighting the center lines for circles – Extended the objects
HIDDEN LINE TECHNIQUE
DICTIONARY OF DRAFTING GEOMETRY
STRAIGHT LINE(SHORTEST DISTANCEBETWEEN TWO POINTS)
PARALLEL LINES
INTERSECTING LINES
DICTIONARY OF DRAFTING GEOMETRY
RIGHT ANGLE ACUTE ANGLE OBTUSE ANGLE
COMPLEMENTARY ANGLE SUPPLEMENTARY ANGLE
DICTIONARY OF DRAFTING GEOMETRY
EQUILATERAL TRIANGLEALL SIDES EQUAL LENGTH
ISOSCELES TRIANGLETWO SIDES EQUAL LENGTH
RIGHT TRIANGLE SCALENE TRIANGLE
DICTIONARY OF DRAFTING GEOMETRY
CIRCLES
CONCENTRIC ECCENTRIC
DICTIONARY OF DRAFTING GEOMETRY
SQUARE RECTANGLE RHOMBUS
RHOMBOID TRAPEZOID TRAPEZIUM
DICTIONARY OF DRAFTING GEOMETRY
PENTAGON HEXAGON HEPTAGON OCTAGON
NONTAGON DECAGON DODECAGON
DICTIONARY OF DRAFTING GEOMETRY
CUBE RIGHTRECTANGLE
RIGHTTRIANGULAR
PRISM
RIGHTTRIANGULAR
PYRAMID
RIGHTCYLINDER
RIGHTCONE
FRUSTUMOF ACONE
SPHERE
PRACTICE BISECTING A LINE
PRACTICE BISECTING AN ARC
PRACTICE BISECTING AN ANGLE
1-40
Figure 1.13 Practice Lettering
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
1-42
Figure 1.15 – Paper sizes
(a)
(b)
Paper Border
1-43
Figure 1.16 – Explain typical layout of a drawing sheet (suitable for detail drawings)
1-44
Figure 1.17 – Explain typical layout of a drawing sheet (suitable for assembly and multi detail drawings)
Assignment 1
Take home/Draw in Class