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GB/T 34358-2017: Dimension measurement of hot free forgings and rolled rings
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| GB/T 34358-2017 | English | 199 |
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Dimension measurement of hot free forgings and rolled rings
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GB/T 34358-2017
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Basic data | Standard ID | GB/T 34358-2017 (GB/T34358-2017) | | Description (Translated English) | Dimension measurement of hot free forgings and rolled rings | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J32 | | Classification of International Standard | 17.040 | | Word Count Estimation | 10,131 | | Date of Issue | 2017-10-14 | | Date of Implementation | 2018-05-01 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | GB/T 34358-2017: Dimension measurement of hot free forgings and rolled rings---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Dimension measurement of hot free forgings and rolled rings
ICS 17.040
J32
National Standards of People's Republic of China
Free forgings, rolling ring thermal dimension measurement
2017-10-14 Published
2018-05-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard by the National Standardization Technical Committee forging (SAC/TC74) and focal point.
This standard was drafted unit. Guizhou Aerospace Air Forging Co., Ltd., Beijing Institute of Electrical and Mechanical Services, Hubei Sanhuan Forging Co., Ltd., Ningbo
Snail Forging Co., Ltd., Wuhan University of Technology, Shanxi Jinrui High-pressure Ring Co., Ltd.
The main drafters of this standard. Wang Bin, Wei Zhijian, Jin Hong, Wei Wei, Li Zhaohui, Gan Wanbing, Wei Baijiang, Hualin, Peng Lan, Jiang Ruihua, Ye Junqing,
Chen Zuxiang, Yu Guolin, Wu Zhonglin, Li Shengshi, continued construction, Han Xinghui, Chen Peng, Zhou Lin, Chen Wenjing.
Free forgings, rolling ring thermal dimension measurement
1 Scope
This standard specifies the free forging, rolling ring (hereinafter referred to as "forgings") theory of the use of thermal dimensions, calculation formula and its application, heat
Measurement of state size.
This standard applies to forgings thermal dimension measurement.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 4339 metallic materials - Determination of thermal expansion characteristic parameters
GB/T 8541 forging terminology
GB 13318 forging production safety and environmental protection General
3 Terms and definitions
GB/T 8541 defined and the following terms and definitions apply to this document.
3.1
Rolled ring roledrings
Metal ring formed by the use of rolling ring forgings.
3.2
Forgings thermal dimension dimensionofhotforgings
Generally refers to the forging temperature in the final forging temperature of the size.
3.3
Forgings Cold Dimensions dimensionofcoldforgings
Forgings temperature at room temperature when the size.
4 Theoretical hot state size of the use, calculation formula and its application
4.1 uses
Forgings Theoretical thermal dimensions are as follows.
a) direct the actual production process operation to control the forging hot size, to ensure forgings cold size in line with the requirements of the process file;
b) Guide forgings for the production of mold cavity size design.
4.2 Calculation formula
4.2.1 Engineering applications, the theoretical thermal state of forgings according to equation (1) calculation.
Lt = L0 [1 α × (t-20)] (1)
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