ENGINEERING GRAPHICS By R.Nathan Assistant Professor Department of Mechanical Engineering

1
ENGINEERING GRAPHICSBy R.NathanAssistant
ProfessorDepartment of Mechanical Engineering
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
2
UNIT 1FREE HAND SKETCHING

• Engineering Graphics Lecture Notes

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
3

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING

• SOLIDS
• Solid is a three dimensional object
• It has three dimensions (Length, Breadth and
  Height /Thickness)
• It is bounded by plane or curved surfaces
• Atleast 2 orthographic views are required to
  represent a solid on a flat surface
• Some times additional views are necessary to
  describe a solid completely

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
4

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING

• Solids can be divided into 2 main groups viz
• POLYHEDRA
• -solids bounded by plane surfaces
• such as Prisms, Pyramids etc
• SOLIDS OF REVOLUTION
• -solids formed by revolution of linear figures
• such as cylinder,cone and sphere

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
5

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
6

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
7

• Engineering Graphics
  Lecture Notes

CUBE
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
8

• Engineering Graphics
  Lecture Notes

CYLINDER , CONE SPHERE
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
9

• Engineering Graphics
  Lecture Notes

FRUSTUM
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
10

• Engineering Graphics
  Lecture Notes

OBLIQUE SOLIDS
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
11

• Engineering Graphics
  Lecture Notes

PROJECTION
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
12

• Engineering Graphics
  Lecture Notes

TYPES OF PROJECTION
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
13

• Engineering Graphics
  Lecture Notes

ORTHOGRAPHIC PROJECTION

• DEFINITION
• Method of representing the exact shape of an
  object in two or more views, on planes always at
  right angles to each other by edtending
  perpendiculars from the object to the planes.
• It is universally used in engineering drawing
• The word ORTHOGRAPHIC means to draw at right
  angles
• Different views of an object are obtained to
  describe with all dimensions
• It is classified into 4 categories according to
  the orientation of the object. But only Ist angle
  and IIIrd angle projections are used in
  engineering drawing.

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
14

• Engineering Graphics
  Lecture Notes

ORTHOGRAPHIC VIEWS
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
15

• Engineering Graphics
  Lecture Notes

ORTHOGRAPHIC DRAWINGS
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
16

• Engineering Graphics
  Lecture Notes

DESIGNATION OF ORTHOGRAPHIC VIEWS
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
17

• Engineering Graphics
  Lecture Notes

FIRST ANGLE PROJECTION
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
18

• Engineering Graphics
  Lecture Notes

FIRST ANGLE PROJECTION SYMBOL
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
19

• Engineering Graphics
  Lecture Notes

THIRD ANGLE PROJECTION
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
20

• Engineering Graphics
  Lecture Notes

THIRD ANGLE PROJECTION SYMBOL
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
21

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
22

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
23

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
24

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
25

• Engineering Graphics
  Lecture Notes

FREE HAND SKETCHING
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
26

• Engineering Graphics
  Lecture Notes

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
27

• Engineering Graphics
  Lecture Notes

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
28

• Engineering Graphics
  Lecture Notes

C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
29

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
30

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
31

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
32

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
33

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012
34

• Engineering Graphics
  Lecture Notes

EXERCISES
C.R.ENGINEERING COLLEGE Alagarkovil, Madurai -
625301
I - SEMESTER
28.09.2012