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GB/T 3480.5-2021Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

May 21, 2021

Implementation date

December 1, 2021

Scope

GB/T 3480.5-2021 (Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials) is available as an English-translated PDF.

GB/T 3480.5-2021 is the Chinese standard "Calculation of load capacity of spur and helical gears - Part 5: Strength and quality of materials". Its scope clause reads: This document gives the tooth surface contact strength limit and tooth root bending strength limit, and provides recommended values.

This document also specifies the material quality The technical requirements of the amount and heat treatment, and explain its influence on the strength limit.

The recommended values in this document apply to the strength calculations in ISO 6336-2, ISO 6336-3 and ISO 6336-6, and are suitable for industrial gears, high Speed gears and marine gear products can also be used to calculate the load-carrying capacity of bevel gears in ISO 10300.This document can be used in the above standards Involved meshing state, basic rack tooth profile, tooth profile parameters, structural design, etc., and the calculation results are consistent with those of ISO 6336-1 and ISO 10300-1. The calculation compliance is very good.

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Document preview — GB/T 3480.5-2021

National Standard of the People's Republic of China

Classification: J 17

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Determination method of gear fatigue strength limit value
4.1 General
4.2 Method A
4.3 Method B
4.4 Br method
4.5 BK Method
4.6 Bp method
5 Fatigue limit in this document---B method
5.1 Application
5.2 Contact fatigue limit sigmaHlim
5.3 Bending fatigue limit sigmaFlim and sigmaFE
5.4 Explanation of sigmaHlim, sigmaFlim and sigmaFE diagrams
5.5 Calculation of sigmaHlim and sigmaFlim
5.6 Penetration depth of case-hardened gears
6 Material quality and heat treatment process requirements
6.1 General principles
6.2 Normalized low-carbon forged steel or cast steel, ordinary carbon steel
6.3 Black heart malleable cast iron
6.4 Other materials
6.5 Sample
6.6 Shot blasting machinery cleaning
6.7 Strengthened shot peening
Appendix A (Informative) Determination of Control Section Size of Quenched and Tempered Gear
Appendix B (informative) Heart hardness coefficient

1 Scope

This document gives the tooth surface contact strength limit and tooth root bending strength limit, and provides recommended values. This document also specifies the material quality

The technical requirements of the amount and heat treatment, and explain its influence on the strength limit.

The recommended values in this document apply to the strength calculations in ISO 6336-2, ISO 6336-3 and ISO 6336-6, and are suitable for industrial gears, high

Speed gears and marine gear products can also be used to calculate the load-carrying capacity of bevel gears in ISO 10300.This document can be used in the above standards

Involved meshing state, basic rack tooth profile, tooth profile parameters, structural design, etc., and the calculation results are consistent with those of ISO 6336-1 and ISO 10300-1.

The calculation compliance is very good.

2 Normative references

The contents of the following documents constitute indispensable clauses of this document through normative references in the text. Among them, dated reference documents,

Only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

file.

ISO 53 standard basic rack tooth profile for cylindrical gears for general machinery and heavy machinery (Cylindricalgearsforgeneraland heavyengineering-Standardbasicracktoothprofile)

ISO 642 Steel Hardenability Test Method for End Quenching (Jominy Test) [Steel-Hardenabilitytestbyend quenching(Jominytest)]

ISO 643.2012 Steel-Micrographicdeterminationofthe apparentgrainsize)

ISO 683-1 Heat-treated steel, alloy steel and free-cutting steel Part 1.Non-alloy steel (Heat-treatablesteels, aloy steelsandfree-cuttingsteels-Part 1.Non-aloysteelsforquenchingandtempering)

ISO 683-2 Heat-treated steel, alloy steel and free-cutting steel Part 2.Quenched and tempered alloy steel (Heat-treatablesteels, aloysteelsandfree-cuttingsteels-Part 2.Aloysteelsforquenchingandtempering)

ISO 683-3 Heat-treated steel, alloy steel and free-cutting steel Part 3.Carburizing and quenching steel (Heat-treatablesteels, aloy steelsandfree-cuttingsteels-Part 3.Case-hardeningsteels)

ISO 683-4 Heat-treated steel, alloy steel and free-cutting steel Part 4.Free-cutting steel (Heat-treatablesteels, aloy steelsandfree-cuttingsteels-Part 4.Free-cuttingsteels)

ISO 683-5 Heat-treated steel, alloy steel and free-cutting steel Part 5.Nitrided steel (Heat-treatablesteels, aloysteels andfree-cuttingsteels-Part 5.Nitridingsteels)

ISO 1122-1 Gear Terms and Definitions Part 1.Geometric Definitions (Vocabularyofgearterms Part 1.Def- initionsrelatedtogeometry)

ISO 1328-1 Cylindrical Gear Accuracy System Part 1.The definition and allowable value of the deviation of the tooth on the same side of the tooth (Cylindrical gears-ISO systemofflanktoleranceclassification-Part 1.Definitionsandalowablevaluesofdevia- tionsrelevanttoflanksofgearteeth)

ISO 2639 Steel-Determination and Verification of the Hardened Layer Depth of Carburized and Quenched Steel Parts depthofcarburizedandhardenedcases)

GB/T 10087 | GB/T 10086 | GB/T 6404.2 | GB/Z 3480.4 | GB/T 3480.3 | GB/T 3480.2 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 71 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 53 · ISO 642 · ISO 643.2012 · ISO 683 · ISO 1122 · ISO 1328 · ISO 2639

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