Muhandislik uchun bepul vosita
Bolt qisish momenti kalkulyatori
Boltni to'g'ri dastlabki zo'riqish kuchiga erishish uchun zarur momentni hisoblang. Metrik qo'pol & nozik qadamli o'tish, imperial UNC va bir nechta moylash sharoitlarini qo'llab-quvvatlaydi.
ISO 898ISO 16047VDI 2230ASME B1.1
Results
Tavsiya etilgan burash momenti
—
Preload Force
—
K-Factor
—
Stress Area
—
Mahkamlash ketma-ketligi
- 1Barcha boltlarni qo'l bilan torgacha mahkamlang snug
- 2Tighten to — (30% moment) naqshda
- 3Tighten to — (70% moment) naqshda
- 4Tighten to — (100% moment) — silliq harakat
Tavsiya etilgan mahkamlash naqshi
Burash momenti hisoblash formulasi
Talab qilinadigan mahkamlash momenti soddalashtirilgan VDI 2230 gayka koeffitsienti usuli yordamida hisoblanadi:
T = K × F × d
- T — tightening torque (N·m)
- K — moment koeffitsienti / gayka omili (0.10–0.25)
- F — maqsadli oldindan siqish kuchi (N)
- d — bolt nominal diametri (m)
Preload Force
F = S × As × η
- S — mustahkamlik asosi: Rp (yield) or Sp (proof stress)
- As — cho'zilish zo'riqish maydoni (mm²)
- η — foydalanish koeffitsienti (0.50–0.90)
Kellermann-Klein tenglamasi
T = F × [ P/(2π) + 1.154·μth·d₂ + μb·(Do+dh)/4 ]
K-omil ma'lumotnomasi
| Sirt holati | K-factor | Notes |
|---|---|---|
| Dry | 0.20–0.25 | High scatter |
| Light oil | 0.14–0.18 | Most common |
| MoS₂ | 0.10–0.12 | Yuqori yuklamalar, zanglamaydigan po'lat |
| PTFE | 0.08–0.10 | Ehtiyot bo'ling: ortiqcha moment |
| Zinc plated | 0.17–0.20 | Qoplamaga bog'liq |
| Anti-seize | 0.11–0.13 | High-temperature |
| Wax patch | 0.09–0.11 | Automotive OEM |
Bolt mustahkamlik sinflari (ISO 898-1)
| Class | Rm | Rp | Sp | Application |
|---|---|---|---|---|
| 4.6 | 400 | 240 | 225 | Non-critical |
| 5.6 | 500 | 300 | 280 | General |
| 8.8 | 800 | 640 | 580/600 | Standart konstruktiv |
| 10.9 | 1040 | 940 | 830 | High-strength |
| 12.9 | 1220 | 1100 | 970 | Kritik, maksimal yuk |
Amaliy Misollar
Nasos flansi — M12 × 1.75, 8.8-sinf, moylanган
K=0.16, F=640×84.3×0.75=40,464 N → T=0.16×40464×0.012=77.7 N·m
Reduktor — M20 × 2.5, 10.9-sinf, zangga qarshi yog'
K=0.12, F=900×245×0.75=165,375 N → T=0.12×165375×0.020=397 N·m
- Over-torquing rezba yirtiladi yoki bolt sinadi
- Under-torquing → bo'shashish, oqish, charchoqdan yemirilish
- Moment kalitlarini yiliga bir marta kalibrlang
- Yig'ishdan oldin rezbalarni tozalang
- 10.9+ sinfli boltlarni qayta ishlatmang
- Bu muhandislik bahosi — muhim birikmalarda ISO 16047 bo'yicha sinab ko'ring
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