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O ‘ zbekiston respublikasi oliy va o ‘ rta maxsus ta’lim vazirligi toshkent davlat texnika universitetiBog'liq 147970 (2)
220
MUNDARIJA
Kirish........................................................................................................................3
I-BOB. ZAGOTOVKA TURLARI VA ULARNI TAYYORLASH …………..5
1.1.
Zagotovka turlari va qo’llaniladigan materiallar ….…........................…5
1.2. Metallni zagotovkalarga bo‘lish turlari............…………………………26
1.3.
Bolg’alash va hajmiy shtamplash uchun zagotovkalarni qizdirish harorati
.............................................................................................................................…28
1.4. Bolg’alash va shtamplashni metall strukturasi va xossalariga ta’siri ...32
1.5. Bolg’alash jarayonining mohiyati va qo’llaniladigan asosiy terminlar..36
II-BOB. BOLG’ALASHNING MOHIYATI, ASOSIY VA YORDAMCHI
ASBOBLAR ..........................................................................................................39
2.1. Bolg’alashning asosiy va yordamchi operatsiyalari ...................................39
2.2. Cho’ktirish…………………………………………………………………..48
2.3. Bolg’alab – cho’zish (protyajkalash)............................……………………59
2.4. Yalpoqlash…………………………………………………………………...73
2.5. Teshik xosil qilish………………………………………………………...…75
2.6. Bukish, siljitish ....…………………………………………………………...81
2.7. Bolg’alashning yordamchi operatsiyalari…………………………………84
2.8. Ishlov berish operatsiyalari………………………………………………...88
2.9. Fasonli va sektsiyali bolg’alash…………………………………………...109
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