NF ISO 6336-5
Calculation of load capacity of spur and helical gears - Part 5 : strength and quality of materials
ISO 6336-5:2003 describes contact and tooth-root stresses, and gives numerical values for both limit stress numbers. It specifies requirements for material quality and heat treatment and comments on their influences on both limit stress numbers. Values in accordance with it are suitable for use with the calculation procedures provided in ISO 6336-2 and ISO 6336-3 and in the application standards for industrial, high speed and marine gears. They are also suited to the calculation procedures given in ISO 10300 for rating the load capacity of bevel gears. It is applicable to all gearing, basic rack profiles, profile dimensions, design, etc., covered by those standards. The results are in good agreement with other methods for the range indicated in the scope of ISO 6336-1.
ISO 6336-5:2003 describes contact and tooth-root stresses, and gives numerical values for both limit stress numbers. It specifies requirements for material quality and heat treatment and comments on their influences on both limit stress numbers. Values in accordance with it are suitable for use with the calculation procedures provided in ISO 6336-2 and ISO 6336-3 and in the application standards for industrial, high speed and marine gears. They are also suited to the calculation procedures given in ISO 10300 for rating the load capacity of bevel gears. It is applicable to all gearing, basic rack profiles, profile dimensions, design, etc., covered by those standards. The results are in good agreement with other methods for the range indicated in the scope of ISO 6336-1.
ISO 6336-5:2016 describes contact and tooth-root stresses and gives numerical values for both limit stress numbers. It specifies requirements for material quality and heat treatment and comments on their influences on both limit stress numbers. Values in accordance with ISO 6336-5:2016 are suitable for use with the calculation procedures provided in ISO 6336‑2, ISO 6336‑3 and ISO 6336‑6 and in the application standards for industrial, high-speed and marine gears. They are applicable to the calculation procedures given in ISO 10300 for rating the load capacity of bevel gears. ISO 6336-5:2016 is applicable to all gearing, basic rack profiles, profile dimensions, design, etc., covered by those standards. The results are in good agreement with other methods for the range indicated in the scope of ISO 6336‑1 and ISO 10300‑1.
- Avant-proposiv
- Introductionv
- Domaine d'application
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2 Références normatives
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3 Termes, définitions et symboles2
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4 Méthode pour la détermination des contraintes admissibles2
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4.1 Généralités2
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4.2 Méthode A3
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4.3 Méthode B3
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4.4 Méthode Bk3
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4.5 Méthode Bp3
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5 Valeurs normalisées pour la contrainte admissible de référence - Méthode B3
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5.1 Application3
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5.2 Contrainte admissible de référence (pression de contact), sigma H lim4
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5.3 Contraintes de flexion sigma F lim et UFE5
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5.4 Abaques de représentation de sigma H lim, sigma F lim et UFE5
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5.5 Calcul de sigma H lim et sigma F lim6
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5.6 Profondeur de durcissement des roues dentées durcies superficiellement21
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6 Exigences pour la qualité et le traitement thermique du matériau24
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6.1 Généralités24
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6.2 Aciers normalisés à faible teneur en carbone ou aciers moulés, aciers au carbone, aciers non alliés (voir Figures 1 et 2)25
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6.3 Fonte malléable (voir Figures 3 et 4)25
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6.4 Autres matériaux (voir Figures 5 à 16)25
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6.5 Témoin de traitement37
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6.6 Décapage mécanique38
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6.7 Grenaillage de précontrainte38
- Annexe A (normative) Dimensions de la section de contrôle pour les roues traitées dans la masse39
- Annexe B (informative) Tableau de conversions de dureté42
- Annexe C (informative) Mesure de la dureté superficielle à l'aide d'une lime43
- Bibliographie45
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