Engineering Graphics1

8/13/2019 Engineering Graphics1

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Engineering

Graphics

Anurag R Pal, PIT


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INDEX

Introduction

Scales

Engineering Curves

Orthographic Projection

Isometric Projection

Projection of Points & Lines

Projection of Planes

Projection of Solids

Section of Solids

IN CLASS

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INTRODUCTIONTypes of Lines

Numbering

Dimensioning

Types of Polygon

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TYPES OF LINESTYPE ILLUSTRATION APPLICATION

CONTINUOUS THICK Visible outlines

CONTINUOUS THIN Dimension lines, Leader

lines, extension lines

CONTINUOUS THIN - WAVY Irregular boundary lines

SHORT DASHES Hidden outlines & edges

LONG CHAIN THIN Center lines, locus lines,

pitch circles

LONG CHAIN LINE

THICK AT ENDS

THIN ELSEWHERE

Cutting plane lines

LONG CHAIN THICK To indicate surface to

receive additional treatment

RULED LINE & SHORT ZIG-

ZAG THINLong break lines

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NUMBERING

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STRAIGHT LETTERS & NUMERALS

Step-1

First draw two horizontal lines of any length at the distance 10 mmapart from each other.

Step-2

Then draw vertical lines between the two horizontal lines atdistance 10 mm apart form each other.

Step-3

Then write down the Capital Alphabet letters within each box insuch a way that each letter of the alphabet should touch the

boundary of the respective box only. Like in the same way writedown full ABCD.

Step-4

As per the procedure described above write down numerals from 1to 0 in a new line.

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INCLINED LETTERS & NUMERALS

Step-1

First draw two horizontal lines of any length at the distance 10 mmapart from each other.

Step-2

Then draw vertical lines between the two horizontal lines such thateach vertical line should be inclined at an angle of 75 with thehorizontal line & each line should be at the distance of 10 mmapart from each other.

Step-3

Then write down the Capital Alphabet letters within each box in

such a way that each letter of the alphabet should touch theboundary of the respective box only. Like in the same way writedown full ABCD.

Step-4

As per the procedure described above write down numerals from 1to 0 in a new line.

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DIMENSIONING

There are two types of dimensioning system:

Uni-Directional System

Aligned System

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In Unidirectional Method of Dimensioning the dimension line

should be cut at center and dimensions should be placed in

the middle of dimension lines as shown into the figure.

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In Aligned Method of Dimensioning the dimension line should

be continuous and dimensions should be placed in the middle

of dimension lines as shown into the figure

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Polygon

30A B

C

4

6

BASIC DRAWING

TRIANGLE

SQUARE

PENTAGON

HEXAGON

SEPTAGON

OCTAGON

How to draw a

Polygon?

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30A B

C

4

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TRIANGLE

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30A B

C

4

6

PENTAGON

BISECTOR

RADIUS

5

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30A B

C

4

6

HEXAGON

RADIUS

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30A B

C

4

6

OCTAGON

8

RADIUS

Anurag R Pal, PIT

Engineering Graphics1

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