7-jadval. Parchin mix va payvand birikmalar uchun qirqilishga boMgan ruxsat etilgan kuchlanishlar B irik m a tu r i
Qirqilishdagi kuchlanish, M p a
P a rch in m ix:
P o 'la t 20 d a n ta y y o rla n g a n asosiy e le m e n tla r
P arm alangan te sh ikd a g i p a rc h in m ix (B s in f)
Y o y ilg a n te sh ikd a g i p a rc h in m ix (C s in f)
100
140
100
Payvand:
Y u p q a q o p la m a li e le k tro d d a q o ‘ ld a payvandlash
Q a lin q o p la m a li e le k tro d d a q o 'ld a payvandlash
A v to m a tik payvandlash
80
110
110
5.3. K onstruksiya elem entlarini siljishga hisoblash 5.6-rasm. 1. Parchin mixli birikmalar. T u rli x il ferm a
s te ije n la rin i, qozon va sam olyot lis tla rin i b irik ti-
ris h d a b o lt v a p a rch in m ix (з а к л ё п к а л а р ^ а п
fo y d a la n ila d i. B o ltli y o k i parchin m ix li b irik m a
la r s iljis h g a ishlaydigan elem entlar hisoblanadi.
Ik k i Iis tn i p archin m ix bilan ulash uchun u la m -
in g ik k a la s i ham b ir x ild a te sh ilib , teshiklarga
p a rc h in m ix k iy g iz ila d i. U n in g uchi g id ra v lik
press y o k i m axsus b o lg ‘ a b ila n p a rc h in la n ib ,
qalpoq h o s il q ilin a d i (5.6-rasm ).
M is o l ta riq a s id a ik k i m e ta ll Iis tn i o ‘ zaro
b ir ik tir u v c h i b ir d ona p a rch in m ix n in g ish i b i
lan ta n is h ib o ‘ ta m iz (5 .7-rasm ).
F k u c h la ri lis tla rn i b ir b irig a nisb a ta n s ilji-
tis h g a in tila d i. B u n g a p a rc h in m ix q a r s h ilik
k o ‘ rs a ta d i, n a tija d a u lis tla r b o s im ig a u c h ra y
d i. P a rch in m ix s irtig a ta ’ s ir e tu v c h i b o s im k u c h in in g q iy m a ti ta sh q i k u c h
F ga teng b o ‘ lib , bu k u ch p a rc h in m ix n i q irq is h g a harakat q ila d i. Q ir q ilis h
ke sim id a u rin m a k u c h la n is h la r b ir te k is d a ta rq a lg a n deb faraz etsak, u h o l
da bu b irik m a u ch u n m u s ta h k a m lik s h a rti q u y id a g ic h a ifo d a la n a d i:
5 .7-rasm. _ F _
Г ~
