. 36 . , , ; , , .
. 36. .
d ha hf h = ha + hf. , , . s . , , s¯ , π , , ( )
= /π.
. , , . . 1 14 . 9.
9.
,
1- | 2- | 1- | 2- |
1,125 | 4,5 | ||
1,25 | 1,375 | 5,5 | |
1,5 | 1,75 | ||
2,25 | |||
2,5 | 2,75 | ||
3,5 |
. 1- 2-.
, : = π ;
d = m z
( πd = pz, a = π , d = pz/π = mz, z ). , .
(.37) h= , hf = m + c = 1,25 , c = 0,25 ; hd = 2 ; ri = 0,25 .
h = ha+hf = 2,25 .
da = d+ 2 ha = mz + 2 m = m (z + 2),
df = d 2 hf = mz 2 *1,2 m = m(z 2,5).
. , ; . ( ), , .
a = (dl d2) / 2 = m (zl z2) / 2,
( ). , aw.
|
|
. 37. . . 38. .
. εα φα τ, . . εα = φα / τ. εα ≥ 1,2.
, ( ). : , .
, , , . . , , . . . ( ) . ( ) , , .
69- . 6- 15 /; 7- 10 /; 8- 6 /; 9- 2 /.
, (. 38). (, ) , ( NN) Fn. Ft Fr, ,
Ft = Fr, cos α, Fr=Fn sin α,
α .
d ,
Ft = 2 T/d, Fr= Ft tg α ( α = 20, Fr= 0,36 Ft).
F, , Fr .