GB/T 3480.2-2021 (English Version) PDF

Scope: This part of GB/T 3480 specifies the basic calculation formulas for the tooth surface load capacity of external and internal involute cylindrical gears, including calculation formulas for all influence coefficients in the evaluation of tooth surface contact fatigue strength. This section applies primarily to oil-lubricated transmissions; however, as long as there is always a sufficient amount of lubricant in the meshing process, it can also be used approximately (at low speeds) for grease-lubricated transmissions. The formula given in this part is applicable to the cylindrical gear tooth profile processed by the basic rack-type tool in GB/T1356, and can also be used for the end face coincidence degree εαn of the equivalent gear (calculation gear) less than 2.5 and conjugated with other basic racks tooth profile. The results calculated using the formulas in this part are very consistent with other methods (see references [5], [7], [10], [12]). In addition to the damage types described in Chapter 4, this section cannot be directly used to assess other tooth surface damage types, such as plastic yielding, scratching or gluing. The load carrying capacity determined by the allowable contact stress is called "flank load carrying capacity" or "flank contact strength". If this scope is not applicable, refer to Chapter 4 of ISO 6336 1:2019.

GB/T 3480.2-2021 Referenced Document

GB/T 10610-2009 Geometrical Product Specifications(GPS)Surface texture:Profile method.Rules and procedures for the assessment of surface texture
GB/T 1356-2001 Cylindrical gears for general and heavy engineering--Standard basic rack tooth profile
GB/T 3374.1-2010 Vocabulary of gear terms-Part 1:Definitions related to geometry
GB/T 3505-2009 Geometrical Product Specifications(GPS).Surface texture:Profile method.Terms,definitions and surface texture parameters
ISO 6336-1 Calculation of load capacity of spur and helical gears — Part 1: Basic principles, introduction and general influence factors
ISO 6336-5 Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials

2021 GB/T 3480.3-2021 Calculation of load capacity of spur and helical gears—Part 3: Calculation of tooth bending strength
1997 GB/T 3480-1997 Calculation methods of load capacity for involute cylindrical gears
0000 GB 3480-1983