GB/T 34358-2017Dimension measurement of hot free forgings and rolled rings (English PDF)
自由锻件、辗轧环件热态尺寸测量
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 14, 2017
Implementation date
May 1, 2018
Scope
GB/T 34358-2017 is the English-translated version of 自由锻件、辗轧环件热态尺寸测量.
GB/T 34358-2017 is the Chinese standard "Dimension measurement of hot free forgings and rolled rings". Its scope clause reads: 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. Its clauses include terms and definitions.
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Document preview — GB/T 34358-2017
National Standard of the People's Republic of China
- ICS
- 17.040
- Classification
- J 32
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Theoretical hot state size of the use, calculation formula and its application
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
Generally refers to the forging temperature in the final forging temperature of the size.
3.3 Forgings Cold Dimensions
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 alpha × (t-20)] (1) […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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