Lecture 1 Friday, 09 October 2015
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ENGINEERING GRAPHICS
1E7
Lecture 1: Introduction
Lecturer: Dr. Bidisha Ghosh ([email protected])
Course Structure
Graphics
• Hand Drawing (part 1) -Dr. B. Ghosh
• Hand Drawing (part 2) -Dr. G. O’Donnell
CAE
• AutoCAD-Dr. S. Pavia
• Pspise--Dr. A. Kokaram
Assessment
• Examination: 65% of the overall mark
– 3 sections (A, B and C)
– 2 questions per section
– 3 questions to be answered, one from each
section
• Dr B. Gosh : Sections A and B
• Dr G. O’Donnell : Section C
• Labs 35% - assessed by coursework
– 10 % AutoCAD
– 10 % Pspice
– 10% D.O. Tutorials Dr B. Gosh
– 5 % D.O. Assignment Dr G. O’Donnell
Time Table
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Syllabus – Hand Drawing 1
• Basic Construction
• Orthographic Projections
• Isometric Projections
• Auxiliary Views
• Perspective : One-Point
• Perspective : Two-Point
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Aim of the Course
• Knowledge of engineering drawing
instruments
• Understanding and interpretation of
technical drawings
• Ability to develop projections of a 3D
object
Lecture 1 Friday, 09 October 2015
Evaluation
• Examination (Sections A & B)
(2/3 of the total examination marks)
• Continuous Assessment
(10% of the total course marks)
– four drawing office tutorials
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Technical
drawing is the
language of
engineers and
designers
Waterfall
M. C. Escher
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Topics of Interest
• Drawing Instruments
• Lines
• Dimensioning
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Lecture 1 Friday, 09 October 2015
DRAWING INSTRUMENTS
1. Drawing Board
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1
Lecture 1 Friday, 09 October 2015
DRAWING INSTRUMENTS
2. Drawing Sheets
A Series Formats
(mm)
841 × 1189
A0
594 × 841
A1
420 × 594
A2
297 × 420
A3
210 × 297
A4
148 × 210
A5
105 × 148
A6
74 × 105
A7
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2
Lecture 1 Friday, 09 October 2015
DRAWING INSTRUMENTS
•Layout of a Drawing Sheet
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3
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DRAWING INSTRUMENTS
• Tee square/ Drafting Machine
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DRAWING INSTRUMENTS
• Set squares (a pair)
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Lecture 1 Friday, 09 October 2015
DRAWING INSTRUMENTS
• Irregular/ French curves
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Lecture 1 Friday, 09 October 2015
DRAWING INSTRUMENTS
• Compasses
• Divider
• Protractor
• Ruler/Scale
• Pencil, Eraser
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DRAWING LINES
TYPES OF LINES
• 3 Main Types
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1
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DRAWING LINES
• Lines to aid understanding
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2
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DIMENSIONING
1
Dimension Lines (DL)
Position of DL
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DIMENSIONING
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2
Alignment of DL
DL of Small Features
Dimensioning Angles
Dimensioning Circles
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DIMENSIONING
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3
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DIMENSIONING
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Correct Practice of Dimensioning
Drawing should
only carry
dimensions needed
to manufacture
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Reference Books
• Technical Draughtsmanship
By Eanna O’Broin
• Engineering Drawing with Worked
Examples
By M.A. Parker & F. Pickup
• Technical Drawing
By F. E. Giesecke, A. Mitchell,
H. C. Spencer, I. L. Hill, J. T. Dygdon,
J. E. Novak
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Assignment for Thursday!
• Get your instruments sorted- buy them
or borrow them
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ENGINEERING GRAPHICS 1E7 - Trinity College, Dublin