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GB/T 35079-2018 English PDF

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GB/T 35079-2018: Multi-way precision die forgings -- Technological design principle
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PDF similar to GB/T 35079-2018


Standard similar to GB/T 35079-2018

GB/T 35082   GB/T 35078   GB/T 33522   

Basic data

Standard ID GB/T 35079-2018 (GB/T35079-2018)
Description (Translated English) Multi-way precision die forgings -- Technological design principle
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J32
Classification of International Standard 77.140.85
Word Count Estimation 11,158
Date of Issue 2018-05-14
Date of Implementation 2018-12-01
Regulation (derived from) National Standards Announcement No. 6 of 2018
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 35079-2018: Multi-way precision die forgings -- Technological design principle

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(Multi-directional precision die forgings) ICS 77.140.85 J32 National Standards of People's Republic of China Principles for multi-directional precision die forging process Published on.2018-05-14 2018-12-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Compilation Principle 1 Appendix A (Normative) Typical material forging temperature range requirements 7 Appendix B (Normative) Mold hardness requirements 8

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Forging Standardization Technical Committee (SAC/TC74). This standard was drafted. China 22nd Metallurgical Group Co., Ltd., 22nd Metallurgical Group Precision Forging Co., Ltd., Beijing Institute of Mechanical and Electrical Engineering. The main drafters of this standard. Liu Wei, Li Mingquan, Li Jingsheng, Zhou Lin, Jin Hong, Song Changzhe, Xu Wencui, Zhou Lijuan, Wei Wei. Principles for multi-directional precision die forging process

1 Scope

This standard specifies the principle of process preparation for precision die forgings (hereinafter referred to as "forgings") formed by multi-directional die forging. This standard is applicable to the multi-directional die forging process with a mass of not more than 1250kg and an external dimension of not more than 1500mm. Forgings.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 702 hot rolled steel bar size, shape, weight and tolerance GB/T 908 forged steel bar size, shape, weight and tolerance GB/T 8541 forging terminology GB 13318 General rules for safety and environmental protection of forging production General technical conditions for GB/T 33879 multi-directional precision die forgings

3 Terms and definitions

The following terms and definitions as defined in GB/T 8541 apply to this document. 3.1 Multi-directional die forging process multi-waydieforgingprocess The multi-directional die forging forming device is used to perform multi-directional co-extrusion and forging forming processes on the blank in a closed cavity. 3.2 Multi-directional precision forgings multi-wayprecisiondieforgings In the process temperature range, the precision die forgings that meet the requirements of the product are obtained through special molds and multi-directional die forging technology.

4 Compilation principles

4.1 General 4.1.1 Process preparation should comprehensively consider the forging material, forging shape complexity, quality requirements, shape tolerance, dimensional accuracy, equipment capability, Forming methods, degree of deformation, mold life and other factors. 4.1.2 The process design shall follow the deformation law of the material, based on the deformation resistance and flow stress of the forging material. Numerical simulation The method optimizes the process and parameters. 4.1.3 Process design should be conducive to the design, manufacture and cost reduction of the mold, which should facilitate rapid mold change and automation at the production site. 4.1.4 Process design should facilitate metal filling and forging demolding. 4.1.5 The calculation of the quality of the blank should fully consider the oxidation loss of the blank under different heating conditions, and avoid the inaccurate quality of the blank. The piece is not filled or expanded. 4.1.6 It should be ensured that the various processes are connected smoothly and the influence of the transit time on the billet temperature is reduced.

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