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]vimalpatel.svnit@gmail.com

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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]vimalpatel.svnit@gmail.com

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]vimalpatel.svnit@gmail.com

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)

vimal

Typewritten text

Mechanical Engineering Department, SVNIT, Surat – 395007 For any query, contact Vimal Patel [i]Ph. No. 9099573650[ii]vimalpatel.svnit@gmail.com

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.