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Orthographic Projections Hareesha N G Dept of Aeronautical Engg Dayananda Sagar College of Engg Bangalore-78 01/18/22 1 Hareesha N G, DSCE, Blore-78
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Orthographic Projections
Hareesha N GDept of Aeronautical Engg
Dayananda Sagar College of EnggBangalore-78
05/03/23 1Hareesha N G, DSCE, Blore-78
Methods of Drawing Orthographic Projections
First Angle Projections MethodHere views are drawn
by placing object in 1st Quadrant
( Fv above X-y, Tv below X-y )
Third Angle Projections MethodHere views are drawn
by placing object in 3rd Quadrant.
( Tv above X-y, Fv below X-y )
FV
TV
X Y X Y
G L
TV
FV
SYMBOLIC PRESENTATION
OF BOTH METHODSWITH AN OBJECT
STANDING ON HP ( GROUND) ON IT’S BASE.
3
NOTE:-HP term is used in 1st Angle method
&For the same
Ground term is used in 3rd Angle method of projections
05/03/23 2Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V. FOR F.V.
FIRST ANGLE PROJECTION
IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN FIRST QUADRANT
MEANS ABOVE HP & INFRONT OF VP.
OBJECT IS INBETWEENOBSERVER & PLANE.
ACTUAL PATTERN OF PLANES & VIEWS
IN FIRST ANGLE METHOD
OF PROJECTIONS
X Y
VP
HP
PP
FV LSV
TV
05/03/23 3Hareesha N G, DSCE, Blore-78
ORTHOGRAPHIC PROJECTIONS{ MACHINE ELEMENTS }OBJECT IS OBSERVED IN THREE DIRECTIONS.
THE DIRECTIONS SHOULD BE NORMAL TO THE RESPECTIVE PLANES.
AND NOW PROJECT THREE DIFFERENT VIEWS ON THOSE PLANES.THESE VEWS ARE FRONT VIEW , TOP VIEW AND SIDE VIEW.
FRONT VIEW IS A VIEW PROJECTED ON VERTICAL PLANE ( VP )TOP VIEW IS A VIEW PROJECTED ON HORIZONTAL PLANE ( HP )
SIDE VIEW IS A VIEW PROJECTED ON PROFILE PLANE ( PP )
AND THEN STUDY NEXT 26 ILLUSTRATED CASES CAREFULLY.TRY TO RECOGNIZE SURFACES PERPENDICULAR TO THE ARROW DIRECTIONS
FIRST STUDY THE CONCEPT OF 1ST AND 3RD ANGLE PROJECTION METHODS
05/03/23 4Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V. FOR F.V.
FIRST ANGLE PROJECTION
IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN FIRST QUADRANT
MEANS ABOVE HP & INFRONT OF VP.
OBJECT IS INBETWEENOBSERVER & PLANE.
ACTUAL PATTERN OF PLANES & VIEWS
IN FIRST ANGLE METHOD
OF PROJECTIONS
X Y
VP
HP
PP
FV LSV
TV
05/03/23 5Hareesha N G, DSCE, Blore-78
x y
FRONT VIEW
TOP VIEW
L.H.SIDE VIEWFOR F.V.
FOR S.V.
FOR T.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
ORTHOGRAPHIC PROJECTIONS
1
05/03/23 6Hareesha N G, DSCE, Blore-78
FOR F.V.FOR S.V.
FOR T.V.
X Y
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
ORTHOGRAPHIC PROJECTIONS
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
2
05/03/23 7Hareesha N G, DSCE, Blore-78
FOR F.V.FOR S.V.
FOR T.V.
ORTHOGRAPHIC PROJECTIONS
X Y
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
3
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD05/03/23 8Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V.
ORTHOGRAPHIC PROJECTIONS
FOR F.V.
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
4
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD05/03/23 9Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR F.V.
FOR S.V.
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
5
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD05/03/23 10Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR F.V.FOR S.V.
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
6
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD05/03/23 11Hareesha N G, DSCE, Blore-78
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
FOR T.V.
FOR F.V.
FOR S.V.
ORTHOGRAPHIC PROJECTIONS
7
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD05/03/23 12Hareesha N G, DSCE, Blore-78
ZSTUDY
ILLUSTRATIONS
X Y
50
20
25
25 20
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
8
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
05/03/23 13Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR F.V.FOR S.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
9
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
05/03/23 14Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
10ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
05/03/23 15Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
11ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
05/03/23 16Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
12
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
L.H.SIDE VIEW
X Y
05/03/23 17Hareesha N G, DSCE, Blore-78
ZSTUDY
ILLUSTRATIONS
x y
FV35
35
10
TV
302010
40
70
O
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
13
ORTHOGRAPHIC PROJECTIONS
05/03/23 18Hareesha N G, DSCE, Blore-78
ZSTUDY ILLUSTRATIONS
SV
TV
yx
FV
30
30
10
30 10 30
ALL VIEWS IDENTICAL
FOR T.V.
FOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
14
ORTHOGRAPHIC PROJECTIONS
05/03/23 19Hareesha N G, DSCE, Blore-78
x y
FV SV
ZSTUDY
ILLUSTRATIONS
TV
1040 60
60
40
ALL VIEWS IDENTICALFOR T.V.
FOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
15
ORTHOGRAPHIC PROJECTIONS
05/03/23 20Hareesha N G, DSCE, Blore-78
FOR T.V.
FOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW THREE VIEWS OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
16ORTHOGRAPHIC PROJECTIONS
x y
FV SV
ALL VIEWS IDENTICAL
40 60
60
40
10
TOP VIEW
05/03/23 21Hareesha N G, DSCE, Blore-78
40 20
30 SQUARE
20
50
6030
10
F.V.S.V.
OFOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND SV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
17
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW L.H.SIDE VIEW
X Y
05/03/23 22Hareesha N G, DSCE, Blore-78
50
80
10
30 D
TV
O
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
18ORTHOGRAPHIC PROJECTIONS
40
10
45
FV
OX Y
05/03/23 23Hareesha N G, DSCE, Blore-78
X Y
FV
O
40
10
10
TV
25
25
30 R
100
103010
20 D
FOR F.V.O
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
19
ORTHOGRAPHIC PROJECTIONS
FOR T.V.
05/03/23 24Hareesha N G, DSCE, Blore-78
O
20 D
30 D60 D
TV
10
30
50
10
35
FV
X Y
RECT.SLOT
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
20ORTHOGRAPHIC PROJECTIONS
TOP VIEW05/03/23 25Hareesha N G, DSCE, Blore-78
O O
40
25
80
F.V.
10
15
25
25
25
25
10
S.V.
FOR S.V. FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND SV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
21
ORTHOGRAPHIC PROJECTIONS
05/03/23 26Hareesha N G, DSCE, Blore-78
450
X
FV
Y
30
40
TV
30 D
40
4015
O
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
22ORTHOGRAPHIC PROJECTIONS
05/03/23 27Hareesha N G, DSCE, Blore-78
O
O
20
2015
40
100
30
6030
20
20
50
HEX PART
FOR S.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV ABD SV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
23
ORTHOGRAPHIC PROJECTIONS
FRONT VIEW L.H.SIDE VIEW
05/03/23 28Hareesha N G, DSCE, Blore-78
O
10
30
10
80
30
T.V.
O10
30
4020
F.V.
X Y
FOR T.V.
FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND TV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
24ORTHOGRAPHIC PROJECTIONS
FRONT VIEW
TOP VIEW
05/03/23 29Hareesha N G, DSCE, Blore-78
LSV
Y
25
25
1050
FV
X
10 10 15
O
FOR S.V.FOR F.V.
PICTORIAL PRESENTATION IS GIVENDRAW FV AND LSV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD
25
ORTHOGRAPHIC PROJECTIONS
05/03/23 30Hareesha N G, DSCE, Blore-78
YX
F.V. LEFT S.V.
20 2010
15
15
1530
10
30
50
15
FOR S.V.
FOR F.V.
O
PICTORIAL PRESENTATION IS GIVENDRAW FV AND SV OF THIS OBJECT
BY FIRST ANGLE PROJECTION METHOD26
ORTHOGRAPHIC PROJECTIONS
05/03/23 31Hareesha N G, DSCE, Blore-78
05/03/23 32Hareesha N G, DSCE, Blore-78
05/03/23 33Hareesha N G, DSCE, Blore-78
05/03/23 34Hareesha N G, DSCE, Blore-78
05/03/23 35Hareesha N G, DSCE, Blore-78
05/03/23 36Hareesha N G, DSCE, Blore-78
05/03/23 37Hareesha N G, DSCE, Blore-78
05/03/23 38Hareesha N G, DSCE, Blore-78
