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Pre-tightening ati egboogi-loosening ti asapo awọn isopọ

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1. Pre-tightening ti okun asopọ Ṣaaju ki o to awọn iṣẹ ti awọn ṣiṣẹ fifuye, awọn dabaru ti wa ni tunmọ si awọn igbese ti awọn aso-tighting agbara.

1. Awọn idi ti ami-tightening

1) Mu lile ti asopọ pọ

2) Mu wiwọ sii

3) Mu agbara lati tọju alaimuṣinṣin

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Ipinnu ti iṣaju iṣaju: 1) Ko si iyipada ninu fifuye iṣẹ: FR FR = (0.2 ~ 0.6) 2) Awọn iyipada fifuye ṣiṣẹ: FR = (0.6 ~ 1) F3) Awọn ibeere wiwọ wa: Fp FR = (1.5 ~ 1.8)

$ 10-7 Awọn ohun elo ati awọn Allowable wahala ti bolts1.Bolt materialBolts ti wa ni tito lẹšẹšẹ gẹgẹbi awọn ohun-ini ẹrọ wọn, ati awọn ofin boṣewa orilẹ-ede: Bolts 3.6, 4.6, 4.8, 5.6, 5.8, 6.8, 8.8,9.8, 10.9, 12.9Nuts 4, 5, 6, 8, 91, 10, 10

2. Itumọ ti koodu ite iṣẹ bolt: Nọmba e akọkọ: tọkasi opin agbara fifẹ ti ohun elo boluti.1/100 ti iyẹn.σ= nomba akọkọ x 100nọmba keji: tọkasi opin ikore ti ohun elo boluti.Igba mẹwa ni agbara iye σ.Sigma.= Nọmba akọkọ x oni-nọmba keji x 10Apeere: Kilasi 4.6 boltσρ=4×100-400MPa, σ, =4×6×10-240MPa3.Wahala Allowable ti asapo asopọWo Awọn tabili iwe-ẹkọ 10-6 ati 10-7

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2. Awọn ibeere iṣiro

Simẹnti ti o taara ehin iyipo jia nipasẹ bọtini ati asopọ ọpa irin, iwọn ila opin apakan ọpa ni jia d=60mm, gigun ibudo L'= 100mm, iyipo ti a firanṣẹ T = 5.5 × 105N.mm, ipa diẹ ninu ṣiṣẹ, gbiyanju lati ṣe apẹrẹ asopọ bọtini yii.Ojutu: 1) Ṣe ipinnu ohun elo, iru ati iwọn ti bọtini nitori pe ibudo jẹ ti irin simẹnti, ohun elo ti bọtini naa le yan 45 irin, ati pe ko si iṣipopada axial laarin awọn jia ati awọn ọpa, ki awọn A-type arinrin alapin bọtini ti wa ni ti yan.Ni ibamu si awọn axle diamita d = 60mm, hobu ipari 100mm, wo Table 10-9, Mu: b = 18mm, h = 11mm, L = 90mm.

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Akoko ifiweranṣẹ: Oṣu Kẹsan-13-2023