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ISO 6336-2:2019

Calculation of load capacity of spur and helical gears — Part 2: Calculation of surface durability (pitting)

Edition date: 2019-11-26
In Force
Available languages: French, English
Summary:

Le présent document spécifie les formules de base à utiliser pour déterminer la capacité de charge à la pression de contact des engrenages cylindriques à denture extérieure ou intérieure à profil en développante de cercle. Il inclut les formules relatives à tous les facteurs d'influence sur la tenue en fatigue à la pression de contact pour lesquels une évaluation quantitative est possible. La présente partie de l'ISO 6336 s'applique essentiellement aux transmissions lubrifiées à l'huile, mais peut également être utilisée pour obtenir des valeurs approximatives dans le cas des transmissions lubrifiées à la graisse (à faible vitesse), tant qu'une quantité suffisante de lubrifiant au niveau de l'engrènement est présente.

Les formules données conviennent pour les engrenages cylindriques à profils de dents conformes au profil crémaillère de référence normalisée dans l'ISO 53. Elles peuvent être également utilisées pour les dentures conjuguées à d'autres crémaillères de référence dont le rapport de conduite apparent virtuel est inférieur à εαn = 2,5. Les résultats sont en concordance avec ceux obtenus par d'autres méthodes (voir Références [5], [7], [10], [12]).

Ces formules ne peuvent pas être directement appliquées pour l'évaluation des types de d'endommagement de surface de dentures d'engrenage tels que la déformation plastique, les griffures, le grippage etc., autres que celle décrite à l'Article 4.

La capacité de charge déterminée au moyen de la pression de contact admissible est appelée «capacité de charge à la pression de contact» ou «tenue en fatigue à la pression superficielle».

Si le domaine d'application n'est pas applicable, se référer à l'ISO 6336‑1:2019, Article 4.



This document specifies the fundamental formulae for use in the determination of the surface load capacity of cylindrical gears with involute external or internal teeth. It includes formulae for all influences on surface durability for which quantitative assessments can be made. It applies primarily to oil‑lubricated transmissions, but can also be used to obtain approximate values for (slow‑running) grease‑lubricated transmissions, as long as sufficient lubricant is present in the mesh at all times.

The given formulae are valid for cylindrical gears with tooth profiles in accordance with the basic rack standardized in ISO 53. They can also be used for teeth conjugate to other basic racks where the actual transverse contact ratio is less than εαn = 2,5. The results are in good agreement with other methods (see References [5], [7], [10], [12]).

These formulae cannot be directly applied for the assessment of types of gear tooth surface damage such as plastic yielding, scratching, scuffing and so on, other than that described in Clause 4.

The load capacity determined by way of the permissible contact stress is called the "surface load capacity" or "surface durability".

If this scope does not apply, refer to ISO 6336-1:2019, Clause 4.
ICS: 21.200-Gears
CTN: ISO/TC 60/SC 2 - 49242

Standards Cancellations

Anula a ISO 6336-2:2006

Anula a ISO 6336-2:2006/Cor 1:2008

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