GB/T 20914.4-2019Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height (English PDF)
冲模 氮气弹簧 第4部分：等高强力氮气弹簧
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Issued by
State Administration for Market Regulation, China National Standardization Administration
Level / Type
National · Recommended
Issue date
October 18, 2019
Implementation date
May 1, 2020
Scope
GB/T 20914.4-2019 is the English-translated version of 冲模 氮气弹簧 第4部分：等高强力氮气弹簧.
GB/T 20914.4-2019 is the Chinese standard "Stamping dies -- Gas springs -- Part 4: Gas spring with increased spring force and same built height". Its scope clause reads: 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. Its clauses include terms and description.
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Document preview — GB/T 20914.4-2019
National Standard of the People's Republic of China
- ICS
- 25.120.10
- Classification
- J 46
Issued by: State Administration for Market Regulation, China National Standardization Administration
Contents
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and description
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.
GB/T 45677 | GB/T 6110 | JB/T 3943 | GB/T 45382 | GB/T 45361 | GB/T 20914.5 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 1804General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
- GB/T 1804-2000General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
- GB/T 7306.1Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads
- GB/T 7306.1-2000Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads
- GB/T 7306.2Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 2: Taper internal and external threads
- GB/T 7306.2-2000Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 2: Taper internal and external threads
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Related Standards
GB/T 1804-2000 — General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications
GB/T 7306.1-2000 — Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 1: Parallel internal and taper external threads
GB/T 7306.2-2000 — Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads. Part 2: Taper internal and external threads
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GB/T 20914.4-2019
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