orthographic projections dr ashish k darpe department of mechanical engineering iit delhi
DESCRIPTION
FOR T.V. FOR S.V. FOR F.V. IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN THIRD QUADRANT ( BELOW HP & BEHIND OF FP. ) PLANES BEING TRANSPERENT AND INBETWEEN OBSERVER & OBJECT. ACTUAL PATTERN OF PLANES & VIEWS OF THIRD ANGLE PROJECTIONS X Y TV THIRD ANGLE PROJECTION LSV FVTRANSCRIPT
Orthographic projections
Dr Ashish K DarpeDepartment of Mechanical Engineering
IIT Delhi
X
Y
HP IS ROTATED DOWNWARD 900
AND BROUGHT IN THE PLANE OF FP.
PP IS ROTATED IN RIGHT SIDE 900
ANDBROUGHT IN THE PLANE OF FP.
X
Y
X Y
FP
HP
PPFV
ACTUAL PATTERN OF PLANES & VIEWS OF ORTHOGRAPHIC PROJECTIONS
DRAWN IN FIRST ANGLE METHOD OF PROJECTIONS
LSV
TV
A) HP IS ROTATED 900 DOUNWARD B) PP, 900 IN RIGHT SIDE DIRECTION.THIS WAY BOTH PLANES ARE BROUGHT IN THE SAME PLANE CONTAINING FP.
PATTERN OF PLANES & VIEWS (First Angle Method)
Horizontal Plane (Top Plane)
Frontal Plane (Vertical Plane)
FP
HP
PP
ORTHOGRAPHIC PROJECTION
FOR T.V.
FOR S.V. FOR F.V.
IN THIS METHOD, THE OBJECT IS ASSUMED TO BE SITUATED IN THIRD QUADRANT( BELOW HP & BEHIND OF FP. )
PLANES BEING TRANSPERENT AND INBETWEEN
OBSERVER & OBJECT.
ACTUAL PATTERN OF PLANES & VIEWS
OF THIRD ANGLE PROJECTIONS
X Y
TV
THIRD ANGLE PROJECTION
LSV FV