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GB/T 20914.3-2019: Stamping dies -- Gas springs -- Part 3: Gas spring with increased spring force and compact built height
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Stamping dies -- Gas springs -- Part 3: Gas spring with increased spring force and compact built height
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GB/T 20914.3-2019
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Basic data | Standard ID | GB/T 20914.3-2019 (GB/T20914.3-2019) | | Description (Translated English) | Stamping dies -- Gas springs -- Part 3: Gas spring with increased spring force and compact built height | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J46 | | Classification of International Standard | 25.120.10 | | Word Count Estimation | 18,189 | | Date of Issue | 2019-10-18 | | Date of Implementation | 2020-05-01 | | Quoted Standard | GB/T 1804; GB/T 7306.1; GB/T 7306.2 | | Adopted Standard | ISO 11901-3-2014, MOD | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the dimensions, nominal initial force and type, identification, technical delivery conditions and markings of compact and powerful nitrogen gas springs. This standard is applicable to compact and powerful nitrogen gas springs for punching dies with a nominal initial force of 1700��(1��5%)N��200000��(1��5%)N, which are pressurized with nitrogen gas of type 1700��200000. | GB/T 20914.3-2019: Stamping dies -- Gas springs -- Part 3: Gas spring with increased spring force and compact built height
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Stamping dies--Gas springs--Part 3. Gas spring with increased spring force and compact built height
ICS 25.120.10
J46
National Standards of People's Republic of China
Die nitrogen gas spring
Part 3. Compact and powerful gas springs
Part 3. Gasspringwithincreasedspringforceandcompactbuiltheight
(ISO 11901-3.2014, Toolsforpressing-Gassprings-
Part 3. Gasspringwithincreasedspringforceandcompactbuiltheight, MOD)
Published on.2019-10-18
2020-05-01 implementation
State market supervision and administration
China National Standardization Administration issued
Foreword
GB/T 20914 "die nitrogen gas spring" is divided into 4 parts.
--- Part 1. General specifications;
--- Part 2. Accessories specifications;
--- Part 3. Compact and powerful nitrogen springs;
--- Part 4. Contour high-strength gas springs.
This part is the third part of GB/T 20914.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This section uses the redrafting method to modify the use of ISO 11901-3.2014 "die gas springs part 3. compact and powerful nitrogen bombs
Spring.
There are technical differences between this part and ISO 11901-3.2014, and the terms involved in these differences have been passed on the outside margins.
The vertical single line (—) of the position is marked. The corresponding technical differences and their reasons are as follows.
---About the normative reference documents, this part has made technical adjustments to adapt to China's technical conditions, adjustments
The situation is reflected in Chapter 2, “Regulatory Citations”, and the specific adjustments are as follows.
● Replace ISO 2768-1 with GB/T 1804 equivalent to the international standard;
● Replace ISO 7-1 with GB/T 7306.1 and GB/T 7306.2 equivalent to international standards.
--- In Table 2, the "l6" tolerance was changed from "10" to "±0.3" to facilitate spring assembly.
--- Table 3, "l1" increases the tolerance "1 0", "l6" increases the tolerance "±0.3", unified with Table 2.
This section has made the following editorial changes.
--- "1 Scope", the description of "unit is millimeter" is deleted;
--- "3 terms and descriptions", "see Figure 1." changed to "nitrogen spring terminology shown in Figure 1.", the picture title is changed accordingly;
--- In Figure 1, the footnote "c" is changed to the number "4", and the footnote "b" is changed to F, which represents the working force, and the corresponding changes are made in the description;
--- In Figure 1, add the label and explain "5---cylinder";
---4.1, change "see Table 1" to "general nominal specifications see Table 1";
--- Table 1, change the head "stroke end point working force increase coefficient" to "boost ratio a", increase the footnote "a boost ratio. end of stroke
The ratio of the force to the nominal initial force. ";
---4.2, change "see Figure 2 and Table 2." to "Model 1700 and 3200 gas spring structure type shown in Figure 2, size is shown in Table 2.";
--- Change "4.3 model 3500 and 15000 nitrogen gas spring" to "4.3 model 3500 to 15000 nitrogen gas spring", due to model
Other types of nitrogen springs are included between 3500 and 15000;
---4.3, will be changed to "see Figure 3, Figure 5, Table 3 and Table 4." to "Model 3500 ~ 15000 gas spring structure type shown in Figure 3 and
Figure 5, dimensions are shown in Tables 3 and 4. ";
---4.4, will change "see Figure 4, Figure 5, Table 3 and Table 4." to "Model 24000 ~.200000 gas spring structure type shown in Figure 4 and
Figure 5, dimensions are shown in Tables 3 and 4. ";
--- "5 inflation pressure" was changed to "5 pressure inflation hole" to comply with the contents of this chapter;
--- "5 pressure inflation hole", the "model 1700 and 3200 gas spring pressure inflation hole at the bottom of the cylinder" is changed to "model
The pressure inflation holes of the 1700 and 3200 gas springs are located at the center of the cylinder bottom", and the position of the inflation holes is clearly defined, which is unified with FIG. 2;
--- In Figure 5, the figure "inflating pressure hole" is changed to "pressure inflation hole", which is unified with the description of Figures 1 to 5;
--- Table 4, the head "to the inflation hole distance" is changed to "inflated hole to cylinder bottom distance", corresponding to the table title "pressure inflation hole position";
--- "8 mark", delete "Model 1700 ~ 3200 gas spring pressure inflation hole position", and all other models of nitrogen bombs
The marking of the spring is uniform, the position of the 1700 and 3200 gas spring pressure inflating holes is unique, as shown in Figure 2
Label.
This part is proposed and managed by the National Die Standardization Technical Committee (SAC/TC33).
This section drafted by. Anhui Jianghuai Automobile Group Co., Ltd., Chongqing Pingwei Automobile Technology Co., Ltd., Hubei Sanhuan Forging
Manufacturing Co., Ltd., South China University of Technology, Dongguan Zhongtai Mould Co., Ltd., Shenzhen Digital Mould Automotive Technology Co., Ltd., Changzhou Dongli
Machinery Co., Ltd., SAIC-GM-Wuling Automobile Co., Ltd. Chongqing Branch, Guangdong Changying Precision Technology Co., Ltd., Yiwu Jinglong
Mould Co., Ltd., Xiamen Kunjin Electronic Technology Co., Ltd., Xi'an Xumai Intelligent Appliance Technology Co., Ltd., Xiamen Wanming Electronics Co., Ltd.
Shaanxi Zeqin Industrial Co., Ltd., Xiamen Meike Security Technology Co., Ltd., Xiamen Sanxing Electronics Co., Ltd., Guilin Electric Apparatus Research Institute
Limited company.
The main drafters of this section. Du Changsheng, Yang Xiaodong, Chen Tianfu, Xia Qinxiang, Xue Fei, Xie Maochun, Wei Wei, Huang Jing, Wang Peng, Zou Xiaohong,
Wang Hailing, Wang Jiang, Liu Gao, Xiao Gangfeng, Luo Zhongtao, Wu Yi, Li Shengshi, Huang Chunsun, Zhang Xiang, Gong Lihua, Huang Shufu, Huang Jingming, Lin Shaolian,
Zhang Li.
Introduction
Users of GB/T 20914 "die nitrogen gas spring" please note that the nitrogen gas spring must comply with the relevant national regulations.
Die nitrogen gas spring
Part 3. Compact and powerful gas springs
1 Scope
This part of GB/T 20914 specifies the size, nominal initial force and type, marking, delivery technical conditions of the compact and powerful gas spring.
mark.
This section applies to model 1700~200000, using nitrogen pressure, nominal initial force is 1700 × (1 ± 5%) N ~.200000 ×
The (1 ± 5%) N die uses a compact and powerful gas spring.
Note. For specifications of nitrogen spring installation accessories, refer to GB/T 20914.2.
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 1804 General tolerances Part 1. Tolerances to linear and angular dimensions without tolerances (GB/T 1804-2000, eqv
ISO 2768-1. 1989)
GB/T 7306.1 55° sealing pipe thread Part 1. cylindrical internal thread and cylindrical external thread (GB/T 7306.1-2000, eqv
ISO 7-1.1994)
GB/T 7306.2 55° sealed pipe thread Part 2. Conical internal and conical external threads (GB/T 7306.2-2000, eqv
ISO 7-1.1994)
3 Terms and description
The gas spring terminology is shown in Figure 1.
Description.
1---plunger rod;
2---top dead center;
3---valve;
4---nitrogen;
5---cylinder;
F---Working power.
a Pressure inflation hole.
Figure 1 Gas spring terminology
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