Dastgoh xaqida umumiy ma’lumot.
257 Radial parmalash dastgohi.
A - asos;
Б - qattiq ustun;
B - aylanma ustunning siqish mexanizmi;
Г - ichi bo'sh aylanadigan ustun;
Д - shpalni ko'tarish, tushirish va qisish mexanizmi;
E - travers;
Ж - vites qutisi va besleme qutisi bilan shpindel bosh qismi;
3 - yon stol.
3. Asosiy kinematik parametrlarni aniqlash
257 – Radial parmalash dasgoxi asosida tezliklar qutisini loyixalash.
1. SHipindelning eng kichik aylanishlar soni – nmin=120 ayl/daq
2. SHipindelning eng katta aylanishlar soni – nmax=200 ayl/daq
3. Tezliklar soni va formulasi – Z=24=3х2х4
4. Eng kata ishlov berish o‘ lchamlari – D = 45 mm
5. Ishlov beriladigon material - Сталь 30 Ϭb =490 MPA
3.1 Dastgoh shpindelining n dan nmax gacha bo’lgan oraliqdagi aylanish chastotasi qatori hisoblanadi.
nmin=n1;
n2=n1 ;
n3=n2 =n1 =n1 2;
n3=n2 =n1 =n1 2………………………….
nmax=nz=n1 z-1}
ketma ketlik bajarilishi kerak bo’lib u geometrik progressiyani tashkil qiladi.
Bu yerda geometrik progressiya maxraji bo’lib
ga teng.
Z=24=3*2*4 ekanligidan
Standardga yaqin qiymat =1.12 deb qabul qilamiz
Standart qiymat qabul qilamiz.
n`1 = 750 ayl/min
nmin= 120 ayl/min
n2=120*1.12= 134 ayl/min
n3= 134 *1.12= 150 ayl/min
n4= 150 *1.12= 168 ayl/min
n5= 168 *1.12= 188 ayl/min
n6= 188 *1.12= 211 ayl/min
n7= 211 * 1.12= 236 ayl/min
n8= 236 *1.12 = 265 ayl/min
n9= 265 *1.12= 297 ayl/min
n10= 297 *1.12= 332 ayl/min
n11= 332 *1.12= 372 ayl/min
n12= 372 * 1.12= 417 ayl/min
n13= 417 *1.12= 467 ayl/min
n14= 467 *1.12= 523 ayl/min
n15= 523 *1.12= 586 ayl/min
n16= 586 *1.12= 656 ayl/min
n17= 656 *1.12 = 735 ayl/min
n18= 735 *1.12= 823 ayl/min
n19= 823 * 1.12= 922 ayl/min
n20= 922 *1.12= 1033 ayl/min
n21= 1033 *1.12= 1157 ayl/min
n22= 1157 *1.12= 1296 ayl/min
n23= 1296 *1.12= 1452 ayl/min
n24= 1452 *1.12= 1626 ayl/min
1- Hol uchun
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I II III
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X1=2
X2=4
X3=3
I – 1
II-X1-2
III-X1* X2-8
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2 - Hol uchun
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I II III
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X1=2
X2=3
X3=4
I – 1
II-X1-3
III-X1* X2-6
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