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GB/T 20914.5-2023: Tools for pressing - Gas springs - Part 5: Safety instructions for gas springs
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20914.5-2023 | English | 334 |
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Tools for pressing - Gas springs - Part 5: Safety instructions for gas springs
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GB/T 20914.5-2023
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Basic data | Standard ID | GB/T 20914.5-2023 (GB/T20914.5-2023) | | Description (Translated English) | Tools for pressing - Gas springs - Part 5: Safety instructions for gas springs | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J46 | | Classification of International Standard | 25.120.10 | | Word Count Estimation | 18,176 | | Date of Issue | 2023-11-27 | | Date of Implementation | 2024-06-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 20914.5-2023: Tools for pressing - Gas springs - Part 5: Safety instructions for gas springs---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.
ICS 25:120:10
CCSJ46
National Standards of People's Republic of China
Die nitrogen gas spring
Part 5: Safety Specifications for Nitrogen Gas Springs
(ISO 11901-5:2021,IDT)
Published on 2023-11-27
2024-06-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is Part 5 of GB/T 20914: GB/T 20914 has released the following 5 parts:
---Part 1: General specifications;
---Part 2: Accessory specifications;
---Part 3: Compact and powerful nitrogen gas spring;
---Part 4: Conformal high strength nitrogen gas spring;
---Part 5: Nitrogen gas spring safety specifications:
This document is equivalent to ISO 11901-5:2021 "Die Nitrogen Gas Spring Part 5: Safety Specifications for Nitrogen Gas Spring":
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed and coordinated by the National Mold Standardization Technical Committee (SAC/TC33):
This document was drafted by: Changzhou Dongli Machinery Co:, Ltd:, Hubei Sanhuan Forging Co:, Ltd:, Chongqing Pingwei Automobile Technology Co:, Ltd:
Company, Binhai Molding Group Co:, Ltd:, Zhejiang Industry and Commerce Vocational and Technical College, Fangsheng Axle (Liuzhou) Co:, Ltd:, Dongguan Xinmeiyang Technology Co:, Ltd:
Co:, Ltd:, Shenzhen Yaotong Technology Co:, Ltd:, Shaoyang Tongda Auto Parts Manufacturing Co:, Ltd:, Zhejiang Huiri Environmental Testing Co:, Ltd:,
Tianjin University, Guilin Electrical Apparatus Research Institute Co:, Ltd:, Shaanxi Shuoen Big Data Technology Co:, Ltd:, Guangxi Mingxin Chassis Components Co:, Ltd:,
Guangdong Yidu Technology Co:, Ltd:, Guangdong Qinghe Technology Co:, Ltd:, Yiwu Changming Mold Co:, Ltd:, Guangdong Yayin Technology Co:, Ltd:, Ningbo
Boyahui Intelligent Technology Co:, Ltd:, Xi'an Jingzhongsheng Technology Co:, Ltd:, Guangdong Angyixin Technology Co:, Ltd:, Zhejiang Anghua New Materials Co:, Ltd:
Company, Shandong Yaosi Intelligent Technology Co:, Ltd:, Shaanxi Jinyoubang Technology Co:, Ltd:, and Xi'an Ningkante Data Service Co:, Ltd:
The main drafters of this document: Fan Guoliang, Hu Wanliang, Wang Peng, Yang Xiaodong, Zhao Haitao, Mou Pengyu, Huang Wentao, Ma Guifang, Wang Liang, Chen Shuangjie,
Xu Xinhua, Wang Zhanbing, Wang Weiwei, Zhang Wei, Cui Shaohua, Nan Shaowei, Chen Zhonggan, Lin Zhaoyi, Chen Hongzhi, Zhu Changming, Zhang Dejun, Chen Naien, Yi Zhonghui,
Xiang Xianbing, Wang Guangjian, Li Ji, Su Shiqiao, Pi Yulin:
Introduction
GB/T 20914 adopts the ISO 11901 series of international standards: Each part is consistent with the international standard and is planned to be composed of 5 parts:
---Part 1: General specifications: The purpose is to unify the dimensions and specifications of general-purpose nitrogen gas springs:
---Part 2: Accessory specifications: The purpose is to unify the dimensions and specifications of standard accessories for nitrogen gas springs:
---Part 3: Compact and powerful nitrogen gas spring: The purpose is to unify the dimensions and specifications of compact and powerful nitrogen gas springs:
---Part 4: Equal-height and powerful nitrogen gas springs: The purpose is to unify the dimensions and specifications of high-strength nitrogen gas springs:
---Part 5: Nitrogen gas spring safety specifications: The purpose is to provide safe usage guidance for nitrogen gas spring users:
Die nitrogen gas spring
Part 5: Safety Specifications for Nitrogen Gas Springs
1 Scope
This document specifies the safety requirements and correct specifications for nitrogen gas springs for dies in accordance with ISO 11901-1, ISO 11901-3 and ISO 11901-4:
correct installation method:
The instructions and operating requirements in Appendix A of this document can help extend the service life of the nitrogen gas spring and ensure safe operation:
2 Normative reference documents
This document has no normative references:
3 Terms and definitions
There are no terms or definitions to be defined in this document:
4 Nitrogen spring safety protection
4:1 General requirements
Improper use of nitrogen gas springs may cause harm to people, equipment, molds, etc:
4:2~4:4 describe some causes of potential injuries and the operation methods of corresponding protective devices:
4:2 Uncontrolled backhaul security protection
Due to factors such as mold parts or wedge jamming, the plunger rod of the nitrogen gas spring may not necessarily follow the pressure return stroke, see Figure 1: When stuck
After the part is retracted, the return speed of the plunger rod will exceed the maximum allowable speed and hit the end point without restraint (the plunger rod has no punch reaction
force, and the jamming parts are pushed out during the return journey), causing serious damage or failure of the nitrogen spring: To avoid this from happening, exhaust should be set up
Device, when the nitrogen spring plunger rod exceeds the maximum allowable speed, it can exhaust and reduce pressure: This will reduce injuries caused by nitrogen spring parts being pushed out
risks of:
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