本文介绍了外齿圆柱直齿轮和斜齿轮齿面断裂承载能力的计算方法。 在齿轮箱的设计和认证过程中，不打算将其用作评级方法。 规定的公式适用于主动和从动圆柱齿轮，而齿廓符合ISO 53中规定的基本齿条。在实际横向接触比小于εα=2,5的情况下，它们也可用于与其他齿条共轭的齿。该程序已针对外壳渗碳[15]齿轮进行了验证，本文件的公式仅适用于规格在以下限值内的外壳渗碳齿轮: -赫兹应力:500 N/mm2≤ 酸碱度≤ 3000 N/mm2； -相对曲率的法向半径:5 mm≤ ρ红色≤ 150毫米； -成品条件下550 HV下的表面硬化深度:0.3 mm≤ 冠心病≤ 4.5毫米。 本文件不适用于评估除齿面断裂以外的齿轮齿损坏类型。

This document describes a procedure for the calculation of the tooth flank fracture load capacity of cylindrical spur and helical gears with external teeth. It is not intended to be used as a rating method in the design and certification process of a gearbox. The formulae specified are applicable for driving as well as for driven cylindrical gears while the tooth profiles are in accordance with the basic rack specified in ISO 53. They can also be used for teeth conjugate to other racks where the actual transverse contact ratio is less than εα = 2,5. The procedure was validated for case carburized[15] gears and the formulae of this document are only applicable to case carburized gears with specifications inside the following limits: — Hertzian stress: 500 N/mm2 ≤ pH ≤ 3 000 N/mm2; — Normal radius of relative curvature: 5 mm ≤ ρred ≤ 150 mm; — Case hardening depth at 550 HV in finished condition: 0,3 mm ≤ CHD ≤ 4,5 mm. This document is not applicable for the assessment of types of gear tooth damage other than tooth flank fracture.