MENG 1008MENG 1008

Engineering Drawing

MENG 1008Lecturer/Demonstrator Information

MANUAL DRAWING:

• Divesh Sahatoo - MAIN LECTURER (drsahatoo@gmail.com)

• Stephenson Thomas – DEPUTY LECTURER

AUTOCAD:

• Stephenson Thomas – MAIN LECTURER• Stephenson Thomas – MAIN LECTURER

• Neil Mahabir – DEPUTY LECTURER

DEMONSTRATORS:

• Marc-Anthony Richards

• George Sammy

• Arshad Mohammed

• Jacy Warrick

• Vishram Boodoo

MENG 1008Course Schedule

WeekMonday Thursday

5pm - 8pm 5pm - 7pm

1 Sept 1st - Independence Day Holiday Sept 4th

2 Sept 8th Sept 11th

3 Sept 15th Sept 18th

4 Sept 22nd Sept 25th Manual Drawing4 Sept 22nd Sept 25th Manual Drawing

5 Sept 29th Oct 2nd

6 Oct 6th Oct 9th AutoCAD

7 Oct 13th Oct 16th

8 Oct 20th Oct 23rd - Divali Day Holiday

9Oct 27th - MANUAL DRAWING

EXAMOct 30th

5:00pm - 6:30pm 6:30pm - 8:00pm 5:00pm - 6:30pm 6:30pm - 8:00pm

10 Nov 3rd Nov 3rd Nov 6th Nov 6th

11 Nov 10th Nov 10th Nov 13th Nov 13th

12 Nov 17th Nov 17th Nov 20th Nov 20th

13 Nov 24th - EXAM Nov 24th - EXAM Nov 27th - EXAM Nov 27th - EXAM

MENG 1008

UNIT – I: INTRODUCTION TO ENGINEERING DRAWING

Principles of Engineering Graphics and their Significance –Drawing Instruments and their Use – Conventions in Drawing – Lettering – Drawing Standards, Engineering Scales, Simple Geometries.

UNIT – II: DRAWING OF PROJECTIONS

Principles of Orthographic Projections – Conventions – First and Third Angle Projections, Projections of Points and Lines inclined to both planes, True lengths.

MANUAL DRAWING COMPONENTS

UNIT – V: ISOMETRIC PROJECTIONS

Principles of Isometric Projection – Isometric Scale –Isometric Views– Conventions – Isometric Views of Lines, Plane Figures, Simple and Compound Solids – Isometric Projection of objects having non- isometric lines. Isometric Projection of Spherical Parts.

UNIT – VI: CONVERSION OF ISOMETRIC AND ORTHOGRAPHIC VIEWS

Conversion of orthographic views into isometric views and Conversion of Isometric Views to Orthographic Views

inclined to both planes, True lengths.

UNIT – III: PROJECTIONS OF PLANES and SOLIDS

Projections of regular Planes, auxiliary planes and Auxiliary projection inclined to both planes. Projections of Regular Solids inclined to both planes – Auxiliary Views. Sections and Sectional views of Right Regular Solids – Prism, Cylinder, Pyramid, Cone – Auxiliary views.

UNIT IV: DEVELOPMENT AND INTERPENETRATION OF SOLIDS

Development of Surfaces of Right Regular Solids – Prisms, Cylinder, Pyramid Cone and their parts. Interpenetration of Right Regular Solids – Intersection of Cylinder Vs Cylinder, Cylinder Vs Prism, Cylinder Vs Cone.

Conversion of Isometric Views to Orthographic Views

UNIT VII: PLANE GEOMETRICAL DRAWING

Geometrical Constructions and Curves Used in Engineering Practice - a) Conic Sections including the Rectangular Hyperbola – General method only, b) Cycloid, Epicycloid and Hypocycloid, c) Involute, d) Helices; Freehand Sketching Techniques.

UNIT VIII : PERSPECTIVE PROJECTIONS

Perspective Views: Points, Lines, Plane Figures and Simple Solids, Vanishing Point Methods (General Method only).

MENG 1008

Week 1

• Introduction to AutoCAD: What is AutoCAD?

• Drawing environments( Graphics area, menu browser button, command line, status bar, layout tabs)

• Starting a New Drawing (templates)

• Naming a drawing

• Drawing Units

• Drawing Limits

• Coordinate system (Rectangular and Polar)

• Direct Distance Entry

• Lines , rectangles, circles, arcs

• Layers

AUTOCAD COMPONENTS

• Layers

• Osnap

• Editing features : erase , move, copy , offset, array , rotate, trim , extend, break, chamfer, fillet, mirror, polar tracking

Week 2

• Dimensioning : Dimension elements, Types of dimensioning

• Texts: Single line and Multiline texts

• Polyline, pedit, ellipse, polygon , point

• Hatching

• Plotting: Paper Space and Model Space

Week 3

• Review

MENG 1008

• Engineering drawing is its own language.

Consists of symbols and conventions which allow those who understand it to document

and communicate effectively regardless of what language they speak.

• Used to effectively plan.

Engineering jobs/projects require proper planning to be safe and successful. Engineering

WHY ENGINEERING DRAWING?

drawing conventions allow projects to be documented and hence thoroughly reviewed

before being executed.

This course is intended to introduce students to the fundamental rules, conventions, and

procedures used for creating and interpreting engineering drawings. Through the use of

several worked examples and practice exercises, students will have the opportunity to

develop their own engineering drawing skills using both manual techniques and computer

aided design (CAD) software.

MENG 1008

Several standards exist which outline the proper and accepted methods for creating,

communicating and documenting drawings.

A standard is “something established for use as a rule or basis of comparison in measuring or

judging capacity, quantity, content, extent, value, quality, etc.”

Drawing standard organizations:

DRAWING STANDARDS

Drawing standard organizations:

• ISO - International Standards Organization

• ANSI - American National Standards Institute

• TTBS - TTS Trinidad and Tobago Bureau of Standards

MENG 1008DRAWING STANDARDS

STANDARD NUMBER STANDARD TITLE

TTBS/ISO 3040 2008 Technical Drawings – Dimensioning and Tolerancing – cones

TTS/ISO 128-1 2008 Technical Drawings – General Principles – Part 1: Introduction and Index

TTS/ISO 129-1 2008 Technical Drawings – Indication of Dimensions and Tolerances – Part 1 – General Principles

TTS/ISO 406 2008 Technical Drawings – Tolerancing of Linear and Angular Dimensions

TTS/ISO 5457 2008 Technical Product Documentation – Sizes and Layout of Drawing Sheets

TTS/ISO 7083 2008 Technical Drawings – Symbols for Geometrical Tolerancing o Proportions and Dimensions

TTS/ISO 6433 2008 Technical Drawings – Item ReferencesTTS/ISO 6433 2008 Technical Drawings – Item References

TTS/ISO 5455 2008 Technical Drawings – Items Scales

TTS/ISO 10209-1 2008 Technical Product Documentation – Vocabulary – Part 1 – Terms Relating to Technical Drawings:

General and Types of Drawings

TTS 31 85 401 1988 Technical Drawings – Dimensioning – General Principles, Definitions, Methods of Execution and

Special Indications

TTS 31 85 002-1 1988 Technical Drawings – Lettering: Currently Used Characters

ANSI Y14.1 – 1980 (R1987) Drawing Sheet Size and Format

ANSI Y14.2M – 1979 (R1987) Line Conventions and Lettering

ANSI Y14.3 – 1975 (R1987) Multiview and Sectional View Drawings

ANSI Y 14.5 M – 1994 Dimensioning and Tolerancing

MENG 1008

• T – square.

• 30° and 45 ° set squares (large – 360mm).

• Metric ruler.

• Large Protractor.

• Spring-bow compass.

• French curves.

• Circle template.

DRAWING TOOLS

• Circle template.

• Paper – A2 size (420mm x 594mm).

• Pencils:– 2H: Used for drawing guidelines.

– 2B: Used for bordering, darkening and writing.

MENG 1008

Setting up your paper:

•Place the T-square firmly against the table’s edge and on the drawing sheet.

•Adjust the top edge of the sheet to align with the drawing (top) edge of the T-square.

•Once aligned, tape down the bottom corners.

•Ensure that the paper is still aligned properly then tape the top edges.

PREPARING TO DRAW

SHEET

DESK

MENG 1008

Bordering:

Before beginning to draw, your sheet should be bordered. All drawing is to take place within

this border.

•Using your ruler or set square, measure and mark a distance of 10mm from each of the 4

sides of the sheet.

• Using your T-Square and set squares draw light (2H) lines through these points which are

parallel to the each immediate side of the sheet.

PREPARING TO DRAW

parallel to the each immediate side of the sheet.

•Once this is complete, darken the border using your 2B pencil.

MENG 1008

Bordering:

PREPARING TO DRAW

MENG 1008

Title Block:

PREPARING TO DRAW

SHEET

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Title Block:

For course purposes:

• Name

• Student ID #

• Course

• Assignment #

PREPARING TO DRAW

NAME ID# ASSIGNMENT #

UNIVERSITY OF THE WEST INDIES DATE

PROJECTION

15 mm

150 mm

• Assignment #

• Date

• Scale

• Projection

• Units of measure

• Any other relevant information (e.g. page #)

PROJECTION COURSE UNITS

SCALE PAGE #

5 mm

MENG 1008

Lettering:

Using 2B or HB pencil.

PREPARING TO DRAW

MENG 1008

Lettering:

Using 2B or HB pencil. 5 mm height.

PREPARING TO DRAW

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Scales:

•Drawings are often done to scale meaning they are drawn with dimensions at a ratio relative to the actual

object being drawn.

•The size of the drawing can be smaller than the actual object or larger than the actual object.

•E.g. If drawing is half the size of the actual object, scale is 1:2.

If drawing is twice the size of the actual object, the scale if 2:1.

•Always dimension the object using the dimensions of the actual object.

PREPARING TO DRAW

100 mm

100 mm

SCALE 1:10 100 mm

100 mm

MENG 1008

Lines & Symbols:

PREPARING TO DRAW

Line/Symbol Representation Use

Visible Line/Outline

For accentuating lines of importance.

This line should be darker than a

guideline (2B pencil).

Guideline/Construction LineVery light line used only as a guide

and drawn using 2H pencilGuideline/Construction Line

and drawn using 2H pencil

CenterlineUsed to designate the centerline of a

circular feature seen from the side

Hidden Line

Used to designate edges which may

be hidden behind the main view of

an object

Section LineUsed to indicate where an object is

cut to reveal internal features

MENG 1008

Lines & Symbols:

PREPARING TO DRAW

Line/Symbol Representation Use

Dimension Line (a)Runs parallel to and is the same

length of the line being dimensioned

Extension Line (b)

Two short lines (typically 8mm long)

which are perpendicular to but not

touching the line being dimensioned

(a)

(b) (b)

touching the line being dimensioned

Diameter

Used to dimension the diameter of a

circle. The arrowhead always points

toward the center of the circle.

RadiusUsed to dimension the radius of a

circle

Center pointUsed to designate the center of an

object when seen as a circle

Ø10

R10

MENG 1008

Dimension Placement:

PREPARING TO DRAW

Aligned System

Uni-directional

System

MENG 1008

Dimensioning Arrowheads:

PREPARING TO DRAW

3

1

MENG 1008

Units:

•Imperial System – inches

•Metric System – millimeters

PREPARING TO DRAW

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DRAWING SIMPLE GEOMETRY

Horizontal Straight Line

•Using T-square, draw light horizontal line using 2H pencil.

•Mark off the length of line desired. Measure using ruler or set square.

•Darken desired length using 2B pencil.

•Dimension if required.100 mm

Vertical Straight Line

•Place T-square against left/right edge of T-square.

•Place shorter edge of set square against top edge of T-square.

•Draw light vertical line using 2H pencil.

•Darken desired length using 2B pencil.

•Dimension if required.100 mm

MENG 1008

Straight Line at an Angle

•Using T-square, draw light horizontal line using 2H pencil.

•Mark off the length of horizontal line desired. Measure using ruler or set square.

•Darken desired length using 2B pencil.

•Using protractor (or set square depending on the angle), mark desired angle then draw light

guideline through mark.

DRAWING SIMPLE GEOMETRY

guideline through mark.

•Measure and darken length of angled line desired.

•Dimension if required.

Circle

•Using ruler or set square and compass, open compass to desired radius.

•Place metal tip of compass on paper where desired and draw circle.

•Dimension if required.

100 mm

30°

MENG 1008

Download Link:

https://drive.google.com/file/d/0B-eFyzDsfAnWenE4OFZiS05kSnM/edit?usp=sharing