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Wire Drawing Stress, Load and Power - I
An aluminium ...
Question
An aluminium wire is drawn from 14.5 mm to 12.2 mm diameter at a speed of 1.5 m/sec. Coefficient of friction between wire and dies is 0.12, semi die angle is
6
o
. Mean flow stress of aluminium is 200 MPa. Drawing load will be ____kN.
14.29
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Solution
The correct option is
A
14.29
Drawing stress,
σ
d
=
σ
0
(
1
+
B
)
B
[
1
−
(
r
0
r
1
)
2
B
]
B
=
μ
c
o
t
α
=
0.12
c
o
t
6
o
B
=
1.142
=
200
(
1
+
1.42
)
1.14
[
1
−
(
12.2
14.5
)
2
×
1.142
]
σ
d
=
122.28
M
P
a
drawing load
P
=
σ
d
×
π
4
d
2
0
=
122.28
×
π
4
×
(
12.2
)
2
P
=
14.29
k
N
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