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GBZ10062.20-2025: Calculation of load capacity of bevel gears - Part 20: Calculation of scuffing load capacity - Flash temperature method
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GB/Z 10062.20-2025: Calculation of load capacity of bevel gears - Part 20: Calculation of scuffing load capacity - Flash temperature method

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GB /Z 10062.20-2025.Calculation Method for Bearing Capacity of Bevel Gears - Part 20.Calculation of Adhesive Bearing Capacity - Flash Method ICS 21.200 CCSJ17 National Standardization Guiding Technical Documents of the People's Republic of China Method for calculating the load-bearing capacity of bevel gears Part 20.Calculation of Bonded Load Capacity Using the Flash Method (ISO /T S10300-20.2021, IDT) Published on 2025-12-03 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Table of contents

Preface III Introduction IV 1.Scope 1 2 Normative References 1 3.Terms and Definitions 2 4 Symbols 2 5 equivalent cylindrical gears 5 5.1 Overview 5 5.2 Local geometric parameters 6 6.Stress and velocity 10 6.1 Locally Modified Contact Stress (σH, mod, Y) 10 6.2 The sum of sliding and velocity 10 6.3 Relative lubricating oil film thickness at contact point Y (λz, Y) 12 6.4 Local friction coefficient (μY) at contact point Y 13 7.Local contact temperature (θC, Y) at contact point Y 14 7.1 Overview 14 7.2 Power Loss Affecting Body Temperature 14 7.3 Body temperature (θM) 15 7.4 Flash temperature (θfl,Y) at contact point Y 16 8.Permissible contact temperature 17℃ 8.1 Limiting temperature of standard bonding test (θS, DIN) 17 8.2 Allowable temperature considering the effect of contact temperature (θSC) 19 8.3 Permissible gluing temperature (θS, Y) 19 9.Local safety factor (SS, Y) at contact point Y 20 References 21

Foreword

This document is a standard or guiding technical document. This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document is Part 20 of GB/T (Z)10062 "Calculation Method for Load Capacity of Bevel Gears". GB/T (Z)10062 has been published. The following section. ---Part 1.Overview and General Impact Coefficient; ---Part 2.Calculation of contact fatigue (pitting) strength of tooth surface; ---Part 3.Calculation of tooth root bending strength; ---Part 20.Flash Method for Calculating the Load-Bearing Capacity of Adhesive Bonds; ---Part 32.Example of scuffing capacity of bevel gears and hypoid gears in ISO evaluation system. This document is equivalent to ISO /T S10030-20.2021 "Calculation method for load-carrying capacity of bevel gears - Part 20.Measurement of scuffed load-carrying capacity". The document type of "Flash Temperature Calculation Method" has been changed from an ISO technical specification to a national standardization guidance technical document in my country. The following minimal editorial changes have been made to this document. ---Change “Cth” to “CTh”, “Ctn” to “CTn”, “θOil,Ref” to “θOil,ref”, and “θS,C” to “θSC” in Table 2. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Technical Committee on Gear Standardization (SAC/TC52). This document was drafted by. Zhengzhou Machine Tool Research Institute (Zhengzhou) Transmission Technology Co., Ltd., Xi'an Laser Transmission Technology Co., Ltd., and Shanxi Taiyuan Heavy Machinery Intelligent Mining Co., Ltd. Mining Equipment Technology Co., Ltd., Zhengzhou Machinery Research Institute Co., Ltd. of China Academy of Machinery Science and Technology, Chongqing University, Northwestern Polytechnical University, Nanjing High Precision Machinery Co., Ltd. Gear Group Co., Ltd., Zhejiang Shuanghuan Transmission Machinery Co., Ltd., Jiangyin Gearbox Manufacturing Co., Ltd., Wenling Minghua Gear Co., Ltd. The company, Harbin Institute of Technology, Sinopec Petrochemical Research Institute Co., Ltd., Guangxi University, Chang'an University, and Zhongyuan University of Technology. The main drafters of this document are. Xu Wenbo, Zhao Ning, Dong Meizhu, Wang Zhigang, Guo Yunfei, Cao Zhigang, Song Chaosheng, Guo Hui, Yang Jianchen, and Li Haixia. He Zhiqiang, Mo Haibo, Yu Guangbin, Fan Ruili, Mo Shuai, Shi Lubing, Guo Qingqing, Guan Hongjie, Qiu Mian, Hao Lichun, Sun Linlin, Li Youhua, Yan Yaolong, Li Bingji, Liu Siyuan, Wang Haiwei, Han Peng, Lu Zhengxin, Hua Dongdong, Su Jinzhan, Hou Nai.

Introduction

GB/T (Z)10062 provides a coherent calculation system for the load-carrying capacity of bevel gears and hypoid gears, covering bevel gears. Various factors need to be considered during design and evaluation, including tooth surface contact fatigue strength calculation, tooth root bending fatigue strength calculation, and tooth surface adhesive. This includes calculations of load-bearing capacity, etc. The GB/T (Z)10062 series aims to promote the application of future knowledge and advanced technologies, and encourages the acquisition of practical applications. Information used. The GB/T (Z)10062 series is proposed to consist of the following parts. ---Part 1.Overview and General Influence Coefficients. The purpose is to provide methods, formulas, terminology, and symbols for calculating the load-carrying capacity of bevel gears. And general influencing factors. ---Part 2.Calculation of Contact Fatigue (Pitting) Strength of Bevel Gear Tooth Surfaces. The purpose is to provide a calculation method for the contact fatigue strength of bevel gear tooth surfaces. Formulas and methods for calculating the relationship. ---Part 3.Calculation of Tooth Root Bending Strength. The purpose is to provide relevant calculation formulas for the bending fatigue strength of bevel gear teeth. Formulas and methods. ---Part 20.Flash Temperature Method for Calculating the Load-Bearing Capacity of Adhesive Bonds. The aim is to provide a method for calculating the load-bearing capacity of bevel gears based on experimental experience and theoretical research. Methods for calculating the anti-adhesion capacity of wheels. ---Part 32.Calculation Examples of Adhesion Carrying Capacity of Bevel Gears and Hypoid Gears under the ISO Evaluation System. The purpose is to provide examples of... The dry example provides a detailed analysis of the calculation process for the scuffing load-bearing capacity of bevel gears and hypoid gears. Table 1 shows the names of the parts of GB/T (Z)10062 and their corresponding ISO standards. When using GB/T (Z)10062 for calculations without specifying a particular part, only the three recommended items listed in Table 1 can be used. National standards (GB/T 10062.1, GB/T 10062.2, GB/T 10062.3). Further calculations will require the use of certain guiding technical documents. In some cases, such as when GB /Z 10062.20 and GB /Z 10062.32 are used as acceptance criteria for special designs, it is necessary for the manufacturer and the purchaser to agree on these criteria in advance. The agreement is consistent. Table 1.Correspondence between GB/T (Z)10062 and ISO 10300 Method for calculating the load-bearing capacity of bevel gears ISO document type Transformed into national standards File types International Standards ISO Technical Specifications ISO /TS Technical Report ISO /TR Recommended standard GB/T Guiding Technical documents GB /Z Part 1.Overview and General Impact Coefficient √ √ Part 2.Calculation of Tooth Surface Contact Fatigue (Pitting) Strength √ √ Part 3.Calculation of Tooth Root Bending Strength √ √ Parts 4 through 19, to be finalized - - - - - Part 20.Calculation of Bonded Load Capacity Using the Flash Method √ √ Parts 21 through 29, to be finalized - - - - - Part 30.Examples of ISO evaluation systems for bevel gears and hypoid gears √ × Part 32.ISO Evaluation System for Bevel Gears and Hypoid Gears - Adhesion Load-bearing capacity example √ √ Note. "√" indicates that it has been published, "×" indicates that it has not yet been published, and "-" indicates that it is to be formulated. Adhesion is a type of localized damage caused by solid-state welding between sliding surfaces, accompanied by the interaction of welding and tearing between the surfaces. Material transfer occurs. Gluing can happen on tooth surfaces operating under boundary lubrication conditions. Under boundary lubrication conditions, the lubricating film is insufficient. This causes the meshing tooth surfaces to separate, leading to direct contact and thus destroying the oxide film that normally protects the tooth surfaces, exposing the bare metal surfaces. Welding together results in adhesive damage. Blok[4] hypothesizes that when the highest surface temperature under tooth contact conditions reaches a critical value, adhesive damage will occur. Adhesion. The maximum contact temperature is determined by the sum of the tooth body temperature and the local instantaneous flash temperature. This is achieved by comparing the maximum contact temperature and the critical temperature. Identify or assess the risk of adhesion. The critical temperature depends not only on the lubricant-metal-atmosphere combination, but also on operating conditions and gear surface characteristics. Therefore, the most accurate critical temperature needs to be determined through testing with real gears under actual working loads and environments. Method for calculating the load-bearing capacity of bevel gears Part 20.Calculation of Bonded Load Capacity Using the Flash Method Warning. When using the formula for a large mean midpoint helix angle [(βm1 + βm2)/2 > 45°], a large effective pressure angle (αe > 30°), and/or For larger tooth widths (b > 13 mmn), the results calculated according to ISO 10300 should be confirmed based on experience.

1 Scope

Based on practical experience and theoretical research [7], this document describes a method for calculating the bearing capacity of bevel gears and quasi-hyperboloid gears through adhesive bonding. Method --- flash temperature method. The formulas in this document aim to establish a unified and acceptable standard for steel spur bevel gears, helical bevel gears, spiral bevel gears, and zero-degree bevel gears. Methods for calculating the anti-galling ability of hypoid gears and quasi-hyperboloid gears. These formulas are also applicable to tapered gears and constant-height gears. In the following text, the techniques... The term "bevel gear" refers to all of the above gear types; if not all types are included, the specific type will be specified. At the time of this document's publication, the accumulated temperature method for calculating the anti-adhesion load-bearing capacity of bevel gears and quasi-hypoid gears was not yet available. The formulas in this document are based on the equivalent cylindrical gear theory and are limited to bevel gears where the end face overlap ratio εvα < 2. The calculation results are valid within the service factor range specified in ISO 10300-1 (see ISO 6336-2). Furthermore, the given calculation method applies to small wheels and... This also applies to bevel gears where the sum of the profile modification coefficients of the large gear is zero (see ISO 23509).

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. Note. GB/T 10062.1-2003 Method for calculating the load-carrying capacity of bevel gears - Part 1.Overview and general influence coefficients (ISO 10300-1.2001, IDT) ISO 10300-2 Method for calculating the load-carrying capacity of bevel gears – Part 2.Calculation (method) of surface durability (pitting) Note. GB/T 10062.2-2003 Calculation Method for Bearing Capacity of Bevel Gears Part 2.Calculation of Contact Fatigue (Pitting) Strength of Tooth Surface (ISO 10300-2) 2001, IDT) ISO 14635-1 Gears - FZG test method - Part 1.Relative scuffing capacity of oils - FZG test method A/ Note. GB/T 19936.1-2005 Gear FZG Test Method Part 1.Oil Scuffing Capacity FZG Test A/8.3/90 (ISO 14635-1.2000, IDT) ISO 17485 Bevel gears - ISO system of accuracy Note. GB/T 11365-2019 Precision system for bevel gears (ISO 17485.2006, IDT) Note. GB/T 43146-2023 Geometry of bevel gears and hypoid gears (ISO 23509.2016, IDT) ...