ISO 1328-1:2013 defines the ISO flank tolerance classification system for cylindrical gears. Eleven flank tolerance classes are defined, numbered 1 (highest precision) to 11 (lowest). It specifies tolerances for pitch, profile, and helix deviations.

Qaysi sifat sinfi kerak?

Class 5-6: precision gearing (machine tools, instruments). Class 6-7: general engineering. Class 8-9: heavy machinery. Class 10-11: rough gearing. Most industrial gearboxes use class 6-8.

Umumiy qadamlar og'ishi (Fp) nima?

Fp — barcha tishlar bo'ylab haqiqiy va nazariy kumulyativ qadam o'rtasidagi maksimal farq. U tishli g'ildirakning atrofidagi barcha tishlar oralig'i aniqligini aks ettiradi. Tishli g'ildiraklarni o'lchash mashinalari yordamida o'lchanadi.

Profil og'ishi tishning haqiqiy profili nazariy involentdan qanchalik farq qilishini o'lchaydi. U umumiy profil og'ishini (Fα), profil shakli og'ishini (ffα) va profil qiyaligi og'ishini (fHα) o'z ichiga oladi.

ISO 1328 toleranslari qanday hisoblanadi?

Tolerances are calculated with the formulae of ISO 1328-1:2013, clause 5.3, from normal module (mn), reference diameter (d), and facewidth (b). Values are computed for class 5 and scaled by a step factor of √2 per class, so tolerances double every two classes.

Bepul muhandislik vositasi #095

Tishli uzatma aniqligi sinfi kalkulyatori

ISO 1328-1 tishli uzatma aniqligi toleranslari. Qadamli og'ish, profil og'ishi va spiral og'ishi toleranslarini aniqlash uchun modul, qadamli diametr, tish eni va sifat sinfini kiriting.

ISO 1328-1Classes 1–11Tolerances

Results

Quality Class

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Umumiy qadam og'ishi F_p

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Yagona qadam og'ishi f_pt

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Profil bo'yicha umumiy og'ish F_α

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Vintsimon chiziq bo'yicha umumiy og'ish F_β

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ISO 1328-1:2013 Tolerance Formulas

Where A is the flank tolerance class (1–11), m_n is the normal module, d the reference diameter and b the facewidth, in mm. Tolerances are calculated for class 5 and scaled by the step factor √2 per class (2^0.5(A−5)), so values double every two classes. Total profile tolerance F_αT and total helix tolerance F_βT are the root-sum-squares of the corresponding slope and form tolerances (clause 5.3). The formulae apply within 5 ≤ z ≤ 1 000, 5 mm ≤ d ≤ 15 000 mm, 0.5 mm ≤ m_n ≤ 70 mm, 4 mm ≤ b ≤ 1 200 mm.

Sifat Sinfi Qo'llanish Qo'llanmasi

Class	Application	Odatiy Tolerans Shkalasi
3–4	Namunaviy tishli g'ildiraklar, o'lchov asboblari	Finest
5–6	Dastgoh qurilmalari, aniqlik reduktorlari, turbina tishli uzatmalari	Precision
7–8	Umumiy sanoat reduktorlari, avtomobil uzatmalari	Standard
9–10	Og'ir mashinasozlik, kon sanoati, tsement	Coarse
11	Qo'pol tishli uzatmalar, qishloq xo'jaligi, past tezlikli	Very coarse