Design web 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: [email protected] www.staff.city.ac.uk/~ra600/intro.htm

1 Ahmed Kovacevic, City University London Design web Objectives for today

 Communication modes in engineering design  Types of drawings  Technical (engineering) drawing standards  Orthographic projections  3rd and 1st Angle Projection

2 Ahmed Kovacevic, City University London Design web Introduction to Drawing

 Communicating » engineer to engineer » engineer to non-engineer » non-engineer to engineer » more than words

3 Ahmed Kovacevic, City University London Design web Types of engineering communication

» Drawings and sketches – Traditional techniques – CAD » Graphical communication – Technical illustrations, diagrams … » Written communication » Oral communication

4 Ahmed Kovacevic, City University London Design web Engineering Graphics

 Model » Physical or computer generated  Technical illustration » Representation of part for non-technical person  Technical sketch » Expression of ideas and preliminary designs

5 Ahmed Kovacevic, City University London Design web 3D Model

6 Ahmed Kovacevic, City University London Design web Technical Illustration

7 Ahmed Kovacevic, City University London Design web Technical Sketching

8 Ahmed Kovacevic, City University London Design web Technical Drawing

There are various types of technical drawing  Design Sketches » Initial Ideas and Requirements » Calculations and Concepts

 Layout Drawings » development of initial design » used to create detailed or assembly drawings

9 Ahmed Kovacevic, City University London Design web Technical Drawing - cont

 Assembly Drawings » parts +/or sub-assemblies = component / machine

 Detail Drawings » information to make or purchase » Include shape, dimensions, tolerances, surface finish...

10 Ahmed Kovacevic, City University London Design web Assembly

11 Ahmed Kovacevic, City University London Design web

Detailed

12 Ahmed Kovacevic, City University London Design web Sketching

 Communication among engineers  Three types of sketches » Pictorial – Technical Illustration » Multiview – Engineering Drawing » Diagrammatic – System Illustration

13 Ahmed Kovacevic, City University London Design web Pictorial

Diagrammatic

Multiview

14 Ahmed Kovacevic, City University London Design web Communicate carrefully

15 Ahmed Kovacevic, City University London Design web Standard Code

Country Code Full name

Thailand มอก. สำ นักงำนมำตรฐำนผลิตภณั ฑอ์ ตุ 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

16 Ahmed Kovacevic, City University London Design web Drawing Layout

BS8888 British standard for Engineering drawings

17 Ahmed Kovacevic, City University London Design web Elements of the Title Block

Text should not be smaller than 3mm. Title block text 4-6 mm

18 Ahmed Kovacevic, City University London Design web Lines

19 Ahmed Kovacevic, City University London Design web Human vision

20 Ahmed Kovacevic, City University London Design web Features of Solid Objects

21 Ahmed Kovacevic, City University London Design web How to create an Object

Join, Subtract, Intersect, Cut

22 Ahmed Kovacevic, City University London Design web How to represent an object

Perspective

Parallel 23 Ahmed Kovacevic, City University London Design web Multiview - Orthogonal

Projection

Development

24 Ahmed Kovacevic, City University London Design web Image orientation – normal faces

25 Ahmed Kovacevic, City University London Design web Camera metaphor

26 Ahmed Kovacevic, City University London Design web Orthographic projections

The six principal views

27 Ahmed Kovacevic, City University London Orthographic Design web projections

28 Ahmed Kovacevic, City University London Design web 3rd and 1st angle projection

29 Ahmed Kovacevic, City University London Design web Normal views and face projection

30 Ahmed Kovacevic, City University London Design web Normal and inclined face projections

31 Ahmed Kovacevic, City University London Design web View alignment and features

32 Ahmed Kovacevic, City University London Design web Exercise DrE-1b



State whether the views shown are in 1st or 3rd Draw the views angle. shown in 3rd Angle Draw the top view in an Projection appropriate position.  



State whether the views shown are in 1st or 3rd Draw the views angle. Draw the top view in an shown in 1st Angle appropriate position. Projection  

33 Ahmed Kovacevic, City University London