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GB/T 20914.4-2019: Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 20914.4-2019 | English | 199 |
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Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height
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GB/T 20914.4-2019
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Basic data | Standard ID | GB/T 20914.4-2019 (GB/T20914.4-2019) | | Description (Translated English) | Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J46 | | Classification of International Standard | 25.120.10 | | Word Count Estimation | 10,125 | | 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 11901-4-2014, MOD | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | | Summary | This standard specifies the size, nominal initial force and model of nitrogen gas springs with constant height and strength. This standard also specifies the identification, technical delivery conditions and markings of constant-height strength nitrogen gas springs. This standard applies to models 10000��95000, which are pressurized with nitrogen gas, and whose nominal initial force is 10000��(1��5%)N to 95000��(1��5%)N, equal-strength nitrogen gas springs for punching dies. | GB/T 20914.4-2019: Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height
---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.
Stamping dies--Gas springs--Part 4. Gas spring with increased spring force and same built height
ICS 25.120.10
J46
National Standards of People's Republic of China
Die nitrogen gas spring
Part 4. Contour high-strength gas springs
Stampingdies-Gassprings-Part 4. Gasspringwithincreasedspring
(ISO 11901-4.2014, Toolsforpressing-Gassprings-
Part 4. Gasspringwithincreasedspringforceandsamebuiltheight, 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 fourth 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 11901-4.2014 "die nitrogen gas springs part 4. contour high-strength nitrogen bombs
Spring.
There are technical differences between this section and ISO 11901-4.2014, 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 standard 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.
This section has made the following editorial changes.
--- "1 Scope", the description of "unit is millimeter" is deleted;
--- "3 terms and descriptions", change "see Figure 1" to "nitrogen spring terminology shown in Figure 1", the picture title is changed accordingly;
--- In Figure 1, the footnote "c" is changed to a number, 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 10000 gas spring structure type shown in Figure 2, size is shown in Table 2";
---4.3, the words "see Figure 3 and Table 2" are changed to "model 24000 ~ 95000 gas spring structure type shown in Figure 3, the size is shown in Table 2";
--- Table 2, "Nominal stroke a is changed to "nominal stroke s", unified with Figure 2, Figure 3.
This part is proposed and managed by the National Die Standardization Technical Committee (SAC/TC33).
This section drafted by. Guilin Electric Science Research Institute Co., Ltd., Changzhou Dongli Machinery Co., Ltd., Anhui Ningguo Chenguang Seiko shares
Co., Ltd., Hubei Sanhuan Forging Co., Ltd., Shaoyang Xingda Precision Machinery Manufacturing Co., Ltd., Anhui Jianghuai Automobile Group Co., Ltd.
Division, Dongguan Maya Precision Mould Co., Ltd., Shenzhen Digital Mould Automotive Technology Co., Ltd., Xiamen Meike Security Technology Co., Ltd., Xi'an Xu
Mai Intelligent Appliance Technology Co., Ltd., Xiamen Wanming Electronics Co., Ltd., Yiwu Jinglong Mould Co., Ltd., Xiamen Kunjin Electronic Technology Co., Ltd.
Company, Shaanxi Zeqin Industrial Co., Ltd., Xiamen Sanxing Electronics Co., Ltd.
The main drafters of this section. Wang Chong, Wang Peng, Gu Zhongquan, Wang Guowen, Wang Yihuan, Huang Yongsheng, Zheng Ben, Hu Xiaofeng, Zhao Lei, Hua Lu, Zuo Changbing,
Li Shihui, Li Yan, Liu Dixiang, Chen Jiawei, Zhou Wei, Lin Shaolian, Huang Jingming, Gong Lihua, Huang Shufu.
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 4. Contour high-strength gas springs
1 Scope
This part of GB/T 20914 specifies the dimensions, nominal initial force and type of contour high-strength gas springs. This section also specifies
Identification, delivery technical conditions and marking of high-strength nitrogen gas springs.
This section applies to models 10000~95000, using nitrogen pressure, nominal initial force is 10000 × (1 ± 5%) N to 95000 ×
The (1 ± 5%) N die is a high-strength nitrogen 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 for linear and angular dimensions without tolerances (GB/T 1804-2000,
EqvISO 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,
eqvISO 7-1.1994)
GB/T 7306.2 55° sealing pipe thread Part 2. Conical internal thread and conical external thread (GB/T 7306.2-2000,
eqvISO 7-1.1994)
3 Terms and description
The gas spring terminology is shown in Figure 1.
The present nitrogen gas spring is an elastic member that is pressurized with nitrogen.
In the rest position, the plunger rod is in the push-out state.
The nitrogen gas spring is provided with an inflation hole for pressurizing or decompressing, and the inflation hole is located on the side of the cylinder and is sealed with a cover.
The pressure inflation hole is an Rp1/8 screw hole conforming to GB/T 7306.1 and GB/T 7306.2.
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