1、BRITISH STANDARD BS ISO 11901-1:2003 Tools for pressing Gas springs Part 1: General specifications ICS 25.120.10 BS ISO 11901-1:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 22 December 2003 BSI 22 December 2003 ISBN 0 580 43119 3 Nati
2、onal foreword This British Standard reproduces verbatim ISO 11901-1:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MTE/12, Tools for pressing and moulding, which has the responsibility to: A list of organizations repre
3、sented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by usin
4、g the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity fr
5、om legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the
6、 UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Am
7、d. No. Date Comments Reference number ISO 11901-1:2003(E)INTERNATIONAL STANDARD ISO 11901-1 Second edition 2003-12-01 Tools for pressing Gas springs Part 1: General specifications Outillage de presse Ressorts gaz Partie 1: Spcifications gnrales BSISO119011:2003 ii BSISO119011:2003 iiiContents Page F
8、oreword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Description and terminology . 2 4 Interchangeability dimensions and characteristics 3 4.1 General nominal specifications. 3 4.2 Gas springs of type 900 and 2 000 3 4.3 Gas springs of type 1 500 and 2 500 . 3 4.4 Gas springs of type 5 00
9、0 to 7 500 3 4.5 Gas springs of type 15 000 to 100 000 3 5 Marking. 9 6 Technical delivery conditions 9 7 Designation 10 Bibliography . 11 BSISO119011:2003iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).
10、The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-g
11、overnmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2
12、. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a
13、vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 11901-1 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 8, Tool
14、s for pressing and moulding. This second edition cancels and replaces the first edition (ISO 11901-1:1995), Clauses 4 and 5 of which have been technically revised. ISO 11901 consists of the following parts, under the general title Tools for pressing Gas springs: Part 1: General specifications Part 2
15、: Specification of accessories BSISO119011:2003 vIntroduction The attention of the user of ISO 11901 is drawn to the fact that gas springs will have to conform to the national regulations of the user country. BSISO119011:2003 1Tools for pressing Gas springs Part 1: General specifications 1 Scope Thi
16、s part of ISO 11901 specifies the dimensions, in millimetres, nominal initial forces and type of gas springs. It applies to gas springs of type 900 to 100 000, pressurized with nitrogen with a nominal initial force of between 900 N 5 % and 100 600 N 5 %, for use in press tools. It also specifies mar
17、king, technical delivery conditions and designation. NOTE Specifications of mounting accessories for gas springs are given in ISO 11901-2. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited ap
18、plies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7-1, Pipe threads where pressure-tight joints are made on the threads Part 1: Dimensions, tolerances and designation ISO 2768-1, General tolerances Part 1: Tolerances for linear and a
19、ngular dimensions without individual tolerance indications BSISO119011:20032 3 Description and terminology See Figure 1. Key 1 rod 2 positive stop 3 valveaPressure filling inlet. bForce. cNitrogen. Figure 1 Terminology The gas spring is an autonomous spring pressurized with nitrogen. At rest positio
20、n, the rod is pushed out. This gas spring feature has a gas inlet for pressurization or depressurization. The inlet is located on the casing or on the bottom and is capped. For gas spring of type 1 500 and 2 500, the pressure filling inlet may be located at the end of the rod. In this case, the rod
21、end is not spherical. The pressure filling inlet of gas springs of type of at least 2 500 includes a pipe thread ISO 7 - Rp 1/8 in accordance with ISO 7-1, and the pressure filling inlet of gas springs of type equal or less than 2 500 includes an M6 thread. BSISO119011:2003 34 Interchangeability dim
22、ensions and characteristics 4.1 General nominal specifications See Table 1 Table 1 General nominal specifications Type Nominal initial force N Maximum filling pressure MPa End of stroke nominal force increase coefficient 900 900 18 1,5 1 500 1 700 15 1,3 2 000 2 000 18 1,5 2 500 2 600 1,3 5 000 4 70
23、0 7 500 7 400 15 000 15 000 30 000 30 000 50 000 50 000 75 000 75 000 100 000 100 600 5 % 15 1,5 4.2 Gas springs of type 900 and 2 000 See Figure 2 and Table 2 4.3 Gas springs of type 1 500 and 2 500 See Figure 3 and Table 3. 4.4 Gas springs of type 5 000 to 7 500 See Figure 4 and Table 3. 4.5 Gas s
24、prings of type 15 000 to 100 000 See Figure 5 and Table 3. BSISO119011:20034 General tolerance: ISO 2768-m aPressurefilling inlet (F = located on the bottom, C = located on the casing). Figure 2 Gas springs of type 900 and 2 000 Table 2 Dimensions of gas springs of type 900 and 2 000 Maximum filling
25、 pressure 18 Mpa Type Nominal stroke a L 0,25 l 11 0 +l 61 0 +r d D 0,3 D 10 0,1 15 72 25 92 38 118 50 142 63 172 900 80 205 1 8 19 17 15 72 25 92 38 118 50 142 63 172 80 205 100 245 2 000 125 295 1 16 1 12 25 23 BSISO119011:2003 5General tolerance: ISO 2768-m aPressurefilling inlet (F = located on
26、the bottom, B = located at rod end). Figure 3 Gas springs of type 1 500 and 2 500 BSISO119011:20036 General tolerance: ISO 2768-m a Pressurefilling inlet. NOTE As an alternative, the rod end may be flat. Figure 4 Gas springs of type 5 000 to 7 500 BSISO119011:2003 7General tolerance: ISO 2768-m a Pr
27、essurefilling inlet. NOTE As an alternative, the rod end may be flat. Figure 5 Gas springs of type 15 000 to 100 000 BSISO119011:20038 Table 3 Dimensions of gas springs of type 1 500 and of type 2 500 to 100 000 Maximum filling pressure15 MPa Type Nominal stroke a L 0,25 l 1 l 2 min l 3 0,15 0 + l 4
28、 min l 5 min l 6 r d D 0,3 D 1 0 0,1 d 1 D 2 Number of holes 10 70 16 82 25 100 50 150 1 500 80 210 2 3,5 4 2,5 10,5 1 12 32 30 10 70 16 82 25 100 50 150 2 500 80 210 2 3,5 4 2,5 10,5 1 15 38 36 25 135 50 185 5 000 80 245 2 3,5 4 2,5 13 14,5 1 20 45 43 M8 20 2 25 145 50 195 80 255 100 295 125 345 7
29、500 160 415 3 5 8 3,5 13 14,5 2 25 50 46 M8 20 2 25 160 50 210 80 270 100 310 125 360 15 000 160 430 3 5 8 4 13 18 2,5 36 75 70 M8 40 4 25 170 50 220 80 280 100 320 125 370 30 000 160 440 3 5 8 4 13 21 2,5 50 95 90 M8 60 4 25 190 50 240 80 300 100 340 125 390 50 000 160 460 3 5 8 4 16 22,5 2,5 65 12
30、0 115 M10 80 4 BSISO119011:2003 9Table 2 (continued) Type Nominal stroke a L 0,25 l 1 l 2 min l 3 0,15 0 + l 4 min l 5 min l 6 r d D 0,3 D 1 0 0,1 d 1 D 2 Number of holes 25 205 50 255 80 315 100 355 125 405 75 000 160 475 3 5 8 4 16 24,5 2,5 80 150 145 M10 100 4 50 260 80 320 100 360 125 410 160 48
31、0 200 560 250 660 100 000 300 760 3 8 8 4 16 30,5 2,5 95 195 190 M12 120 4 5 Marking Gas springs shall be labelled in an indelible way, with at least the following information: a) the manufacturers name; b) the gas used; c) the date of manufacture; d) the maximum filling pressure; e) the type. 6 Tec
32、hnical delivery conditions Gas springs shall be supplied at the nominal pressure at a reference temperature of 20 C. NOTE Increase in temperature increases pressure at constant volume according to the following formulae: p t= p 0(1 + 0,003 6 t) where p tis the nitrogen pressure, in megapascals, at t
33、emperature t; p 0is the nitrogen pressure, in megapascals, at reference temperature; t is the temperature variation. The rod shall be slightly oiled and protected against shocks. BSISO119011:200310 7 Designation A gas spring in accordance with this part of ISO 11901 shall be designated by: a) “Gas s
34、pring”; b) reference to this part of ISO 11901, i.e. ISO 11901-1; c) the type; d) the nominal stroke, in millimetres; e) the location of the pressure filling inlet for gas spring of type 900 to 2 500; EXAMPLE A gas spring of type 1 500, nominal stroke of 25 mm and with a pressure filling inlet locat
35、ed on the bottom (F) is designated as follows: Gas spring ISO 11901-1 - 1 500 25 - F BSISO119011:2003 11Bibliography 1 ISO 11901-2 1) , Tools for pressing Gas springs Part 2: Specification of accessories 2 Council directive 97/23/CE “Pressure equipment” 1)To be published. BSISO119011:2003BS ISO 1190
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