MEMB113

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MEMB113

• ENGINEERING GRAPHICS CAE
• SESSION 1
• MANUAL DRAWING

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Contents

• C1 Introduction to Engineering Graphics
• C2 Introduction to Manual Drawing
• C3 Engineering geometry (Basic geometrical
  constructions)
• C4 Dimensioning
• C5 Multi-view drawing
• C6 Isometric drawing
• C7 Auxiliary drawing
• C8 Section drawing
• C9 Tolerance
• C10 Assembly detail drawings

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CHAPTER 1

• Introduction to Engineering Graphics

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Content
MEMB113 MANUAL DRAWING CHAPTER 1

• Overview
• Engineering design
• Engineering graphics
• Sketching

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What Why
MEMB113 MANUAL DRAWING CHAPTER 1

• What?
• To provide the big picture of what engineering
  design eng. graphics is all about
• To learn the importance of sketches and the
  techniques in engineering graphics
• Why?

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1.1 Overview
MEMB113 MANUAL DRAWING CHAPTER 1

• Engineering graphics communication involves the
  use of visual material to convey technical ideas
  and problem solutions.
• Engineering or technical drawing one of the
  most widely used method.
• Definition of drawing
• A graphic representation of an idea, concept or
  an entity which actually or potentially exists in
  life.

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1.1 Overview
MEMB113 MANUAL DRAWING CHAPTER 1

• Importance
• A way of communication between engineers at all
  stages of the design problem solving from
  initial ideas, design, analysis manufacturing.
• For Visualisation, Communication and Documentation

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1.1 Overview
MEMB113 MANUAL DRAWING CHAPTER 1

• Types of drawing
• artistic
• technical
• Illustrations
• rendering

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1.1 Overview
MEMB113 MANUAL DRAWING CHAPTER 1

• Examples of different drawing types

3-D computer model of the interior of an office
building
A dimensioned technical/mechanical drawing
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1.2 Engineering design
MEMB113 MANUAL DRAWING CHAPTER 1
Concurrent design process
Traditional engineering design sequence
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1.2 Engineering design
MEMB113 MANUAL DRAWING CHAPTER 1

• Engineering drawing in design process

Visualisation is the ability to mentally picture
things that do not exist
to see the problem possible solutions
Visualise
Sketches
Communication - the design solution should be
communicated to others without ambiguity
to record initial ideas
created from sketches used for analysis
Geometric model
Detail drawings
to record the precise data for production process
Documentation - permanent record of the solution
3D model
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1.3 Engineering graphics
MEMB113 MANUAL DRAWING CHAPTER 1

• Drawings are widely used in engineering
  applications manufacturing, design, structural,
  electrical, etc.
• Standards and conventions
• To ensure everybody using the same method
• Commonly used
• ANSI, ASME, ISO, JIS, MS, DIN, BS

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1.3 Engineering graphics
MEMB113 MANUAL DRAWING CHAPTER 1

• What will you learn
• Producing engineering drawings
• Interpreting engineering drawings
• Graphics theory, visualisation,
• standards, conventions,
• applications,etc.

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1.3 Engineering graphics
MEMB113 MANUAL DRAWING CHAPTER 1

• E.g. Anatomy of a technical drawing

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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• 3 methods of creating technical drawings
• Freehand, mechanical digital
• Technical sketching is the process of producing
  a rough preliminary drawing representing the main
  features of a product or structure
• Normally done by freehand, generally less
  finished, less structured/ restricted, take
  less time to produce

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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• Technical sketches
• Used extensively in the first stage of design
  process / visualisation
• An informal tool used by everyone involved in the
  design manufacture of a product

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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• Sketching tool
• Paper
• Pencils
• Eraser
• Sketching technique e.g.
• Straight line sketch
• Circle arc
• Component (proportional sketch)
• Pictorial sketch

Mechanical
Sketched
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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• Sketching straight line

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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• Sketching circle

Sketching component (proportional)
Sketching circle
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1.4 Sketching
MEMB113 MANUAL DRAWING CHAPTER 1

• Multi-view and pictorial sketches

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1.5 Conclusion
MEMB113 MANUAL DRAWING CHAPTER 1
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End of Chapter 1

• Thank You