Engineering Drawing
Topic No 6 Penetration Curve & Surface Development
Mechanical Engineering Department, SVNIT, Surat – 395007For any query, contact Vimal Patel [i]Ph. No. 9099573650[ii][email protected]
`
Ex.1 A square prism with 50 mm side at its base and an axis of 90 mm length, isresting on its base with an angle of the base inclined at 300 to the VP. It iscompletely penetrated by a horizontal cylinder of 50 mm diameter and 90mm in length. The axes of both the solids are parallel to VP and bisect eachother. Draw projections showing curves of intersection
6 Penetration curve &Surface Development
Engineering Drawing
Topic No 6 Penetration Curve & Surface Development
Mechanical Engineering Department, SVNIT, Surat – 395007For any query, contact Vimal Patel [i]Ph. No. 9099573650[ii][email protected]
Ex. 2 A square prism, with 50 mm edges at its base and an axis of 80 mm length, is resting on itsbase with an edge of the base inclined at 300 to the VP. It has a horizontal cylindrical hole of50mm diameter cut trough it. The axis of the hole is parallel to the VP and bisects the axis ofthe prism. Draw the projections showing the curves of the intersections of the surfaces.
Engineering Drawing
Topic No 6 Penetration Curve & Surface Development
Mechanical Engineering Department, SVNIT, Surat – 395007For any query, contact Vimal Patel [i]Ph. No. 9099573650[ii][email protected]
Ex. 3 A vertical square prism with 50 mm side at its base and axis of 90 mm is resting on its basewith side surfaces equally inclined to the VP. It is completely penetrated by another squareprism of 35 mm sides at its base and axis 90 mm long. The axis of the penetrating prism isparallel to both, the Hp and VP, 8 mm infront of the axis of the vertical prism and 45 mmabove the base of the vertical prism. If the side faces of the penetrating prism are equallyinclined to the VP, draw the projections showing the curves of intersection.
3,3'
2,2'
1,1'
8,8'
7,7'
6,6'
5,5'
4,4'
1,1'
2,2',8,8'3,3',7,7'4,4',6,6'
5,5'
11'
2,8
2',8'3,7
3',7'
4,64',6'
55'
3'3
2'2
4'4
5'5
1'1
6'6
8'8
7'7
c,c'
d,d'
a,a'
b,b'
d'b'
c'a'
dc
ab
c'b'
d'a'
cb
da
32
50
30°
45°
45°
TOP VIEW
FRO
NT VIEW
LHS VIEW
96
Direction of O
bservation forTO
P VIEW
Direction of O
bservation forFRO
NT V
IEW
Direction of
Observation for
FRON
T VIEW
70Ex.4:
Asqu
areprism
,side
ofbase
50m
man
dh
eight
70m
m,
isrestin
gon
H.P.
onits
basew
ithon
eof
the
sideof
basein
clined
at300
toV
.P.Th
eabove
prismis
penetrated
byh
orizontal
prism,
sideof
base32
mm
and
length
96m
m.
Rectan
gular
facesof
the
horizon
talprism
areequ
allyin
clined
toV
.P.&
H.P.
both.
The axis of tw
o prisms are bisect at righ
t angle. D
raw th
e projections an
d show
the lin
e of intersection
.
Example D
rawn by:
vJalpa Pankhania (A
64)
vM
aitreyee Thakkar (A74)
vA
nusha Relwani (A
75)
vKhushali Shah (A
76)
Sanjana Kanstiya (A77)
125
O
30
45°
21,3
4
2'
1',3'
4'
3'2',4'
1'
32,4
1
ab,d
cd
ca
b O
O
ba,c
d
4,4'
1,1'
2,2'
3,3'
x3x1
x1x3
x3x1
p2
p4p4'
p2'p1',p3' p1,p3
70
Example D
rawn B
y:1. A
14 [Priyansha Jetely] 2. A15 [M
amidi R
eshma] 3. A
25 [ Apoorva Patel]
4. A29 [N
iharika Parmar] 5. A
66 [Realy Verm
a]
Ex.6:
Asqu
arepyram
id,side
ofbase
70 mm
and h
eight 125
mm
,is
resting
onH
.P.on
isbase
with
alledges
ofbase
equally
inclin
edto
V.P.
Asqu
areprism
,side
ofbase
30m
m,
intersects
the
axisof
pyramid
atrigh
tan
gle50
mm
aboveth
ebase.
The
axisof
the
prismis
parallelto
H.P.
and
V.P.
bothan
drectan
gular
facesof
prismare
equally
inclin
edto
H.P.
and
V.P.
both.
Draw
projections
show
ing
lines of in
tersection.