O‘RIK DANAGI QOBIG‘INI CHAQISH VA MAG‘ZINI AJRATIB OLISH JARAYONIGA QOBIQ QALINLIGI HAMDA NAMLIKNING TA’SIRI
Keywords:
o‘rik danagi, qobiq qalinligi, chaqish yuklamasi, namlik, mag‘z butunligi, kalibrlash, uzluksiz chaqish qurilmasi, deformatsiyaAbstract
Maqolada O‘zbekistonda yetishtirilayotgan o‘rik navlari danaklari qobig‘ini chaqish va mag‘zini butun holda ajratib olish jarayoniga qobiq qalinligi hamda namlik darajasining ta’siri o‘rganilgan. Beshta nav namunasi WP-300 rusumli universal sinov qurilmasida danak shofi qirrasi bo‘ylab siqishga sinaldi. Qobiq qalinligi 1,01 dan 2,16 mm gacha ortganda chaqish uchun zarur yuklama 0,301 kN dan 0,619 kN gacha, siqilish darajasi esa 0,547 dan 0,845 mm gacha ko‘tarilishi aniqlandi; jarayon F = 38,1 + 262,14·δ chiziqli tenglama bilan tavsiflanadi. Namlik 4 % dan 8,5 % gacha oshirilganda talab etiladigan yuklama 0,656 kN dan 0,560 kN gacha pasaydi, 8,5 % dan yuqori namlikda esa qobiqda yoriq hosil bo‘lmasdan plastik deformatsiya kuzatildi. Olingan qonuniyatlar asosida ishchi organlari orasidagi oraliq masofasi 4–6 mm chegarasida sozlanadigan, uzluksiz rejimda ishlovchi val–tirkama tipidagi chaqish qurilmasining texnologik rejimlari asoslandi. Yarim sanoat sinovlarida danakning to‘la chaqilish darajasi 85,7–88,0 %, mag‘zining maydalanish darajasi 8–11 %, unumdorlik sutkasiga 300–330 kg, solishtirma energiya sarfi 1,2 kVt·soat ni tashkil etdi.
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