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GB/T 3480.1-2019: Calculation of load capacity of spur and helical gears -- Part 1: Basic principles, introduction and general influence factors
Status: Valid GB/T 3480.1: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 3480.1-2019 | English | 1784 |
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Calculation of load capacity of spur and helical gears -- Part 1: Basic principles, introduction and general influence factors
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GB/T 3480.1-2019
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| GB/T 3480-1997 | English | 3359 |
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Calculation methods of load capacity for involute cylindrical gears
| Obsolete |
GB/T 3480-1997
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| GB 3480-1983 | English | RFQ |
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Methods for the calculation of load capacity of involute cylindrical gears
| Obsolete |
GB 3480-1983
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PDF similar to GB/T 3480.1-2019
Basic data | Standard ID | GB/T 3480.1-2019 (GB/T3480.1-2019) | | Description (Translated English) | Calculation of load capacity of spur and helical gears -- Part 1: Basic principles, introduction and general influence factors | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J17 | | Classification of International Standard | 21.200 | | Word Count Estimation | 94,965 | | Date of Issue | 2019-12-31 | | Date of Implementation | 2020-07-01 | | Older Standard (superseded by this standard) | GB/T 3480-1997 | | Quoted Standard | GB/T 1356-2001; GB/T 3374.1-2010; GB/T 3505-2009; GB/T 10095.1-2008; GB/T 10610-2009; ISO 6336-2; ISO 6336-3; ISO 6336-5; ISO 6336-6 | | Adopted Standard | ISO 6336-1-2006, IDT | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the basic principles, overview and general influence factors for the calculation of the bearing capacity of spur and helical gears. it | GB/T 3480.1-2019: Calculation of load capacity of spur and helical gears -- Part 1: Basic principles, introduction and general influence factors
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Calculation of load capacity of spur and helical gears-Part 1. Basic principles, introduction and general influence factors
ICS 21.200
J17
National Standards of People's Republic of China
Partially replaces GB/T 3480-1997
Calculation of load capacity of spur and helical gears
Part 1. Basic principles, overview, and general impact coefficient
(ISO 6336-1..2006, IDT)
2019-12-31 release
2020-07-01 implementation
State Administration of Market Supervision
Published by the National Standardization Administration
Contents
Foreword III
1 Scope 1
2 Normative references 1
3 Terms, definitions, codes and acronyms 2
4 Basic principles 14
4.1 Application 14
4.2 Tangential Load, Torque and Power 19
5 Use factor KA 20
5.1 Using the A method to determine the use factor KA-A 20
5.2 Determination of the use factor KA-B by the B method 20
6 Dynamic load factor Kv 20
6.1 Factors and calculations that affect internal dynamic loads 20
6.2 Principles and Assumptions 22
6.3 Determination of dynamic load coefficient 22
6.4 Determination of the dynamic load coefficient Kv-B by the B method 23
6.5 Determining the dynamic load factor Kv-C by C method 30
7 Helix load distribution coefficients KHβ and KFβ 34
7.1 Gear tooth load distribution 34
7.2 General principles for determining the helix load distribution coefficients KHβ and KFβ 34
7.3 Determination of the Spiral Load Distribution Coefficient --- Principles and Assumptions 35
7.4 Determining the Spiral Load Distribution Coefficient KHβ-B by Method B 36
7.5 Determining the Spiral Load Distribution Coefficient KHβ-C by Method C 39
7.6 Helix load distribution coefficient KFβ calculated by determining the bending strength by method B or C 52
8 Tooth load distribution coefficients KHα and KFα 52
8.1 Tooth Load Distribution 52
8.2 Determination Method of Tooth Load Distribution Coefficient --- Principles and Assumptions 52
8.3 Using the B method to determine the load distribution coefficients KHα-B and KFα-B between teeth 53
9 Gear tooth stiffness c 'and cγ 57
9.1 Stiffness Effects 57
9.2 Determination of Gear Tooth Stiffness-Principles and Assumptions 58
9.3 Determination of tooth stiffness c 'and cγ by the B method 58
Appendix A (normative) Supplementary methods for determining fsh and fma 62
Appendix B (informative) (involute) Guide value for drum shape modification and tooth end thinning of cylindrical gears 64
Appendix C (informative) Guidelines for KHβ-C of cylindrical gear drum teeth 66
Appendix D (informative) Calculations and explanations 69
Appendix E (informative) Analysis and determination of load distribution 72
References 87
Foreword
GB/T 3480 `` Calculation of Bearing Capacity of Spur and Helical Gears '' is intended to include the following 5 parts.
--- Part 1. Basic principles, overview, and general impact coefficient;
--- Part 2. Calculation of tooth surface contact strength (pitting corrosion);
--- Part 3. Calculation of tooth root bending strength;
--- Part 5. Strength and quality of materials;
--- Part 6. Calculation of service life under variable load conditions.
This part is the first part of GB/T 3480.
This section is drafted in accordance with the rules given in GB/T 1.1-2009.
This section replaces part of GB/T 3480-1997 "Calculation method of bearing capacity of involute cylindrical gear".
Compared with GB/T 3480-1997, the main technical changes in this section are as follows.
--- This section completely adopts ISO 6336-1..2006, only the basic principles and common impact coefficients, and does not involve ISO 6336-2 and
Calculation of contact and bending strength in ISO 6336-3;
--- More than 100 new codes in this section, including many important coefficients, component coefficients, material codes, geometric quantities, deviations, etc .;
--- The appendix content has been greatly adjusted and added;
--- Amended some terms, such as "tooth direction" changed to "spiral", "tooth shape" changed to "tooth profile", "longitudinal" changed to "axial" and so on.
This section uses the translation method equivalent to ISO 6336-1..2006 "Calculation of spur and helical gear carrying capacity. Part 1. Basic principles
Management, Overview and General Impact Coefficients.
This section incorporates the technical errata content of ISO 6336-1..2006/Cor.1..2008, and the clauses related to these contents have been passed.
Vertical double lines (║) in the margins of the side margins are marked.
The Chinese documents that have a consistent correspondence with the international documents referenced normatively in this section are as follows.
--- GB/T 3480.5-2008 Calculation of load capacity of spur gears and helical gears Part 5. Strength and quality of materials
(ISO 6336-5..2003, IDT)
--- GB/T 3480.6-2018 Calculation of load capacity of spur and helical gears Part 6. Service life under variable load
Calculation (ISO 6336-6..2006, IDT)
The following editorial changes have also been made in this section.
--- Change the "ρred" in the combination code of Table 1 of ISO 6336-1..2006 to "ρrel";
--- In ISO 6336-1..2006 formula (32), "q2 =
di1
dm2
"To" q2 =
di2
dm2
";
--- Change the "T" at the beginning of the third paragraph of the note in Figure 12 of ISO 6336-1..2006 to "T *";
--- Change a solid line in ISO 13336-1..2006 Figure 13 a), b), d), e) to a dotted line;
--- Change the "shaft" (shaft) in the title of 7.5.5 of ISO 6336-1..2006 to "bearing";
--- Change "a" to "~" in ISO 6336-1..2006 formula (B.9);
--- D.2 of ISO 6336-1..2006 "defined in 7.3.1" was changed to "defined in 7.2.1";
--- Change the "Y" to "y" in the symbol interpretation of the ISO 6336-1..2006 formula (E.4);
--- Change "SLi 1" to "SLi 1" in ISO 6336-1..2006 formula (E.12);
--- Change "xi 1" to "xi 1" in ISO 6336-1..2006 formula (E.14);
--- Change the "cγm" to "Cγm" in the interpretation of the ISO 6336-1..2006 formula (E.22);
--- Change "δi" to "δ1" in ISO 6336-1..2006 formula (E.31);
--- Change "KH" to "KHβ" in E.5.4 of ISO 6336-1..2006.
This part is proposed and managed by the National Gear Standardization Technical Committee (SAC/TC52).
This section was drafted. Zhengzhou Machinery Research Institute Co., Ltd., Zhengzhou China Machinery Rail Transit Equipment Technology Co., Ltd., Hunan University, China Machinery
Productivity Promotion Center, Zhengzhou High-end Equipment and Information Industry Technology Research Institute Co., Ltd., Xi'an Fast Automotive Transmission Co., Ltd., Shandong
Huacheng Zhongde Transmission Equipment Co., Ltd., Jiangsu Zhonggong High-end Equipment Research Institute Co., Ltd., and Chongqing University.
The main drafters of this section. Li Feng, Wang Zhigang, Wu Luji, Li Yunpeng, Zhou Changjiang, Han Wei, Li Wutian, Yan Jianbo, Ju Guoqiang, Li Youhua,
Liu Zhongming, Wang Changlu, Zhang Jingcai, Zhang Kun, Guan Hongjie, Fan Ruili, Chen Bingkui, Zhang Fayong, Wang Guoguang, Zheng Ming, Yu Feipeng.
The previous versions of the standards replaced by this section are.
--- GB 3480-1983, GB/T 3480-1997.
Calculation of load capacity of spur and helical gears
Part 1. Basic principles, overview, and general impact coefficient
1 Scope
This part of GB/T 3480 introduces the basic principle, overview and general influence factor of spur gear and helical gear calculation. it
Together with ISO 6336-2, ISO 6336-3, ISO 6336-5 and ISO 6336-6 provides a way to compare different gear designs
Comparative method. It is not used to guarantee the performance of the assembled gear device, nor is it intended for general engineering personnel, but for experienced gear devices.
It can be used by designers, who can reasonably value the coefficients in the formula according to the knowledge of similar design, and understand what each value has to the calculation result.
influences.
The formula in GB/T 3480 is to calculate the tooth surface contact strength and tooth root bending strength of involute cylindrical spur gears or helical gears.
It is proposed to provide a widely accepted method.
GB/T 3480 contains the results based on experimental and theoretical researches such as Hirt [1], Strasser [2], and Brossmann [3]. Use this
The results of the normal calculation method are quite consistent with the results of the previously accepted calculation methods (for normal working pressure angles not exceeding 25 ° and indexing snails)
For cases where the rotation angle does not exceed 25 °, see references [4] ~ [8]).
For larger pressure angles and helix angles, the trend of the product of YFYSYβ and the product of ZHZεZβ is different from some previously applied methods
of. Users should note that when GB/T 3480 is applied to this situation, its calculation results need to be confirmed based on experience.
The formula in GB/T 3480 does not apply to any of the following situations.
--- The coincidence of the end faces of the spur gear or helical gear pair is less than 1.0;
--- The coincidence of the end faces of the spur gear or helical gear pair is greater than 2.5;
--- interference of tooth tip and tooth root;
--- pointed teeth;
--- The backlash is 0.
The formula in GB/T 3480 is not applicable to other forms of gear tooth damage, such as plastic yield, surface lamination, gluing and abrasion.
Used for unpredictable tooth damage caused by vibration. The bending strength calculation formula is only applicable when the tooth is broken at the fillet of the tooth root.
However, it does not apply to broken teeth on the working surface, failure of the wheel flange or failure of the wheel body caused by spokes and hubs. GB/T 3480 is not applicable to
Gear teeth that are forged or sintered as the final processing step are not suitable for gear pairs with poor contact areas.
GB/T 3480 provides a calculation method for the bearing capacity of tooth surface pitting and tooth root fracture. When the pitch circle linear velocity is less than 1m/s, the tooth
Wheel load capacity is usually limited by abrasive wear (for calculations in this regard, see other literature).
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 1356-2001 Standard basic rack profile for cylindrical gears for general machinery and heavy machinery (idt ISO 53..1998)
GB/T 3374.1-2010 Gear terms and definitions Part 1. Geometric definition (ISO 1122-1..1998, IDT)
GB/T 3505-2009 Product Geometric Technical Specification (GPS) Terms, definitions and surface structure parameters of surface structure contour method
(ISO 4287..1997, IDT)
GB/T 10095.1-2008 Cylindrical gear precision system Part 1. Definition and allowable value of deviation of tooth surface on the same side of gear teeth
(ISO 1328-1..1995, IDT)
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