NF ISO 6336-1

NF ISO 6336-1

October 2006
Standard Cancelled

Calculation of load capacity of spur and helical gears - Part 1 : basic principles, introduction and general influence factors

ISO 6336-1:2006 presents the basic principles of, an introduction to, and the general influence factors for, the calculation of the load capacity of spur and helical gears. Together with ISO 6336-2, ISO 6336-3, ISO 6336-5 and ISO 6336-6, it provides a method by which different gear designs can be compared. It is not intended to assure the performance of assembled drive gear systems. It is not intended for use by the general engineering public. Instead, it is intended for use by the experienced gear designer who is capable of selecting reasonable values for the factors in these formulae based on knowledge of similar designs and awareness of the effects of the items discussed.The formulae in ISO 6336 are intended to establish a uniformly acceptable method for calculating the pitting resistance and bending strength capacity of cylindrical gears with straight or helical involute teeth.

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Main informations

Collections

National standards and national normative documents

Publication date

October 2006

Number of pages

119 p.

Reference

NF ISO 6336-1

ICS Codes

21.200   Gears

Classification index

E23-030-1

Print number

2 - 01/05/2007

International kinship

ISO 6336-1:2006
Sumary
Calculation of load capacity of spur and helical gears - Part 1 : basic principles, introduction and general influence factors

ISO 6336-1:2006 presents the basic principles of, an introduction to, and the general influence factors for, the calculation of the load capacity of spur and helical gears. Together with ISO 6336-2, ISO 6336-3, ISO 6336-5 and ISO 6336-6, it provides a method by which different gear designs can be compared. It is not intended to assure the performance of assembled drive gear systems. It is not intended for use by the general engineering public. Instead, it is intended for use by the experienced gear designer who is capable of selecting reasonable values for the factors in these formulae based on knowledge of similar designs and awareness of the effects of the items discussed.

The formulae in ISO 6336 are intended to establish a uniformly acceptable method for calculating the pitting resistance and bending strength capacity of cylindrical gears with straight or helical involute teeth.

Replaced standards (1)
NF ISO 6336-1
June 2002
Standard Cancelled
Calculation of load capacity of spur and helical gears - Part 1 : basic principles, introduction and general influence factors

Le présent document fait partie d'un ensemble de normes sur le calcul de la capacité de charge des roues cylindriques à denture intérieure ou extérieure et à profil en développante de cercle. Il s'adresse principalement aux concepteurs d'engrenages. Après avoir défini les symboles utilisés et les principes de base, il décrit les différents facteurs généraux d'influence et les méthodes permettant de les calculer.

Standard replaced by (1)
NF ISO 6336-1
April 2020
Standard Current
Calculation of load capacity of spur and helical gears - Part 1: basic principles, introduction and general influence factors

This document presents the basic principles of, an introduction to, and the general influence factors for the calculation of the load capacity of spur and helical gears. Together with the other documents in the ISO 6336 series, it provides a method by which different gear designs can be compared. It is not intended to assure the performance of assembled drive gear systems. It is not intended for use by the general engineering public. Instead, it is intended for use by the experienced gear designer who is capable of selecting reasonable values for the factors in these formulae based on the knowledge of similar designs and the awareness of the effects of the items discussed. The formulae in the ISO 6336 series are intended to establish a uniformly acceptable method for calculating the load capacity of cylindrical gears with straight or helical involute teeth. The ISO 6336 series includes procedures based on testing and theoretical studies as referenced by each method. The methods are validated for: ? normal working pressure angle from 15° to 25°; ? reference helix angle up to 30°; ? transverse contact ratio from 1,0 to 2,5. If this scope is exceeded, the calculated results will need to be confirmed by experience. The formulae in the ISO 6336 series are not applicable when any of the following conditions exist: ? gears with transverse contact ratios less than 1,0; ? interference between tooth tips and root fillets; ? teeth are pointed; ? backlash is zero. The rating formulae in the ISO 6336 series are not applicable to other types of gear tooth deterioration such as plastic deformation, case crushing and wear, and are not applicable under vibratory conditions where there can be an unpredictable profile breakdown. The ISO 6336 series does not apply to teeth finished by forging or sintering. It is not applicable to gears which have a poor contact pattern. The influence factors presented in these methods form a method to predict the risk of damage that aligns with industry and experimental experience. It is possible that they are not entirely scientifically exact. Therefore, the calculation methods from one part of the ISO 6336 series is not applicable in another part of the ISO 6336 series unless specifically referenced. The procedures in the ISO 6336 series provide rating formulae for the calculation of load capacity with regard to different failure modes such as pitting, tooth root breakage, tooth flank fracture, scuffing and micropitting. At pitch line velocities below 1 m/s the gear load capacity is often limited by abrasive wear (see other literature such as References [23] and [22] for further information on such calculation).

Table of contents
  • Avant-propos
    vi
  • Introduction
    vii
  • 1 Domaine d'application
    1
  • 2 Références normatives
    2
  • 3 Termes, définitions, symboles et termes abrégés
    2
  • 4 Principes de base
    12
  • 4.1 Application
    12
  • 4.2 Effort tangentiel, couple, puissance
    19
  • 5 Facteur d'application KA
    20
  • 5.1 Méthode A - Facteur KA-A
    21
  • 5.2 Méthode B - Facteur KA-B
    21
  • 6 Facteur dynamique interne KV
    21
  • 6.1 Paramètres influençant les efforts dynamiques internes et calcul
    21
  • 6.2 Principes et hypothèses
    23
  • 6.3 Méthodes pour la détermination du facteur dynamique
    24
  • 6.4 Détermination du facteur dynamique suivant la Méthode B : KV-B
    25
  • 6.5 Détermination du facteur dynamique suivant la Méthode C: KV-C
    36
  • 7 Facteurs de distribution longitudinale de la charge KH'béta' et KF'béta'
    41
  • 7.1 Distribution longitudinale de la charge
    41
  • 7.2 Principes généraux pour la détermination des facteurs de distribution longitudinale de la charge KH'béta' et KF'béta'
    42
  • 7.3 Méthodes pour la détermination du facteur de distribution longitudinale de la charge - Principes et hypothèses
    43
  • 7.4 Détermination du facteur de distribution longitudinale de la charge en appliquant la Méthode B : KH'béta'-B
    44
  • 7.5 Détermination du facteur de distribution longitudinale de la charge à l'aide de la Méthode C : KH'béta'-C
    48
  • 7.6 Détermination du facteur de charge de face pour la contrainte en pied de dent à l'aide de la Méthode B ou C: KF,6
    65
  • 8 Facteurs de distribution transversale de la charge KHa et KFa
    65
  • 8.1 Distribution transversale de la charge
    65
  • 8.2 Méthodes pour la détermination des facteurs de distribution transversale de la charge - Principes et hypothèses
    66
  • 8.3 Détermination des facteurs de distribution transversale de la charge suivant la Méthode B - KHa-B et KFa-B
    66
  • 9 Rigidités de denture c' et c gamma
    72
  • 9.1 Influences sur la rigidité
    72
  • 9.2 Méthodes pour la détermination des rigidités de denture - Principes et hypothèses
    72
  • 9.3 Détermination des rigidités de denture c' et c. suivant la Méthode B
    73
  • Annexe A (normative) Méthodes supplémentaires pour la détermination de fsh et fma
    78
  • Annexe B (informative) Valeurs indicatives pour le bombé et les dépouilles d'extrémité des dents d'engrenages cylindriques
    81
  • Annexe C (informative) Valeurs indicatives pour le facteur d'application KH'béta'-C pour les dents d'engrenages cylindriques bombées
    84
  • Annexe D (informative) Dérivations et notes explicatives
    87
  • Annexe E (informative) Détermination analytique de la distribution de la charge
    91
  • Bibliographie
    111
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