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2M<br />
f 1<br />
Fn1<br />
=<br />
μ d<br />
F<br />
Fa<br />
2<br />
= = F<br />
tanα<br />
+ 2μ<br />
F<br />
a1<br />
2 f 1<br />
= d<br />
M<br />
tanα + 2μ<br />
μ<br />
tanα<br />
= F<br />
tanα<br />
+ 2μ<br />
n2<br />
n1<br />
n1<br />
q<br />
F a1<br />
BUTUC<br />
F a2<br />
F<br />
n2<br />
M<br />
2M<br />
f<br />
=<br />
μ d<br />
2<br />
q =<br />
tanα<br />
tanα<br />
+ 2μ<br />
d<br />
= M f = M f1 + M f2 = μ Fn1<br />
1<br />
2<br />
( q)<br />
tc +<br />
M = μF<br />
M<br />
M<br />
t<br />
z=<br />
2<br />
t<br />
z=<br />
3<br />
t<br />
=<br />
=<br />
d<br />
2<br />
2<br />
( 1+<br />
q + q + K)<br />
=<br />
F<br />
n1 μ n1<br />
z=<br />
1<br />
z=<br />
1<br />
( 1+<br />
q) M = 1.33M<br />
t<br />
2 z=<br />
1<br />
z=<br />
1<br />
( 1+<br />
q + q ) M ≈1.43M<br />
α ≈ 14°<br />
μ ≈ 0.12<br />
In practica M t (z=2) =1.5 M t (z=1)<br />
t<br />
t<br />
q = 0.5<br />
t<br />
z<br />
d 1−<br />
q<br />
2 1−<br />
q<br />
Bucsa de<br />
strangere<br />
2M<br />
t 1−<br />
q<br />
Fa<br />
=<br />
d q<br />
M<br />
HUB<br />
d<br />
d<br />
z<br />
( 1−<br />
q )<br />
ARBORE<br />
D<br />
2×<br />
2<br />
z=<br />
1 z=<br />
1<br />
t<br />
= 2 ⋅<br />
1.5<br />
M t<br />
=<br />
3<br />
M t<br />
ARBORE<br />
D<br />
BUTUC<br />
Feb. 2011 - T. Cicone<br />
29<br />
OM-I Cap 4. Asamblari A/B<br />
Gaura filetata<br />
pentru demontare<br />
Feb. 2011 - T. Cicone<br />
30<br />
OM-I Cap 4. Asamblari A/B<br />
3
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