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ME 1110 – Engineering Practice 1
Engineering Drawing and Design - Lecture 2
Introduction to Engineering Drawing
Prof Ahmed Kovacevic
School of Engineering and Mathematical Sciences
Room CG25, Phone: 8780, E-Mail: a.kovacevic@city.ac.uk
www.staff.city.ac.uk/~ra600/intro.htm
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Objectives for today
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Communication modes in engineering design
Types of drawings
Technical (engineering) drawing standards
Orthographic projections
3rd and 1st Angle Projection
Ahmed Kovacevic, City University London
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Introduction to Drawing
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Communicating
» engineer to engineer
» engineer to non-engineer
» non-engineer to engineer
» more than words
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Types of engineering communication
» Drawings and sketches
– Traditional techniques
– CAD
» Graphical communication
– Technical illustrations, diagrams …
» Written communication
» Oral communication
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Engineering Graphics
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Model
» Physical or computer generated
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Technical illustration
» Representation of part for non-technical person
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Technical sketch
» Expression of ideas and preliminary designs
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3D Model
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Technical Illustration
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Technical Sketching
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Technical Drawing
There are various types of technical
drawing
 Design Sketches
» Initial Ideas and Requirements
» Calculations and Concepts
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Layout Drawings
» development of initial design
» used to create detailed or assembly drawings
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Technical Drawing - cont
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Assembly Drawings
» parts +/or sub-assemblies = component / machine
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Detail Drawings
» information to make or purchase
» Include shape, dimensions, tolerances, surface
finish...
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Assembly
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Detailed
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Sketching
Communication among engineers
 Three types of sketches
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» Pictorial
– Technical Illustration
» Multiview
– Engineering Drawing
» Diagrammatic
– System Illustration
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Pictorial
Diagrammatic
Multiview
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Communicate carrefully
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Standard Code
Full name
Country
Code
Thailand
มอก.
สำนักงำนมำตรฐำนผลิตภัณฑ์อตุ สำหกรรม
USA
ANSI
American National Standard Institute
Japan
JIS
Japanese Industrial Standard
UK
BS
British Standard
Australia
AS
Australian Standard
Germany
DIN
Deutsches Institut für Normung
ISO
International Standards Organization
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Drawing Layout
BS8888
British standard for Engineering drawings
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Elements of the Title Block
Text should not be
smaller than 3mm.
Title block text 4-6 mm
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Lines
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Human vision
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Features of Solid Objects
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How to create an Object
Join, Subtract, Intersect, Cut
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How to represent an object
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Perspective
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Parallel
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Multiview - Orthogonal
Projection
Development
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Image orientation – normal faces
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Camera metaphor
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Orthographic projections
The six principal views
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Orthographic
projections
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3rd and 1st angle projection
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Normal views and face projection
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Normal and inclined face projections
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View alignment and features
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Exercise DrE-1b

Draw the views
shown in 3rd Angle
Projection
State whether the views
shown are in 1st or 3rd
angle.
Draw the top view in an
appropriate position.



Draw the views
shown in 1st Angle
Projection

State whether the views
shown are in 1st or 3rd
angle.
Draw the top view in an
appropriate position.

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Ahmed Kovacevic, City University London