. .
(. 27.3, ) . H, 2 1. 3 .
(. 27.3, ) 1 2. , . , . . .
, , W0 d. . W0 = (1,04... 1,10)m, m .
D (. . 27.4).
. ij ( ) .
, (27.4)
2 , ͷ; ψbd = b/d = 0,1...0,2 ( u < 100); [σ]3M , ; d , .
(20, 40, , 40 .) ( = 28...32 HRC) [] = (10...20) ; [σ]3M = (4...10) .
, (27.4), m = d /z, z .
' , (27.1)
z = z1 = u (z2 z1) = u z U.
' , (27.2)
z = z2 = u (z2 z1) = u zU,
, u z =1; U = 2) ( ) z = 2u. . 0,2 ≤ m ≤ 2 .
|
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ij :
d1 = m z1, d2 = m z2. (27.5)
, b = ψbd d.
(. 27.4) : b1 = 0,5d1; R = 0,06 d1; R0 = (2...3)mm; h1 = 0,025 ; h2 = (0,5... 0,8) h1; L = (0,8... 1,2)d1; D=df12h1
. s ≥ 1,5.
. 27.5 , . 1 5 6. 9 ' 10 8. 7 . ' 4 , . 2 3.
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