1、BSI Standards PublicationBS ISO 11901-3:2014Tools for pressing GasspringsPart 3: Gas spring with increased springforce and compact built heightBS ISO 11901-3:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 11901-3:2014.The UK participation in its preparati
2、on was entrusted to TechnicalCommittee MTE/12, Tools for pressing and moulding.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correc
3、tapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 79401 8ICS 25.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy C
4、ommittee on 28 February 2014.Amendments issued since publicationDate Text affectedBS ISO 11901-3:2014 ISO 2014Tools for pressing Gas springs Part 3: Gas spring with increased spring force and compact built heightOutillage de presse Ressorts gaz Partie 3: Ressorts gaz force accrue faible encombrement
5、 en hauteurINTERNATIONAL STANDARDISO11901-3First edition2014-03-01Reference numberISO 11901-3:2014(E)BS ISO 11901-3:2014ISO 11901-3:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduce
6、d or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO
7、 copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 11901-3:2014ISO 11901-3:2014(E) ISO 2014 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13
8、 Description and terminology 14 Interchangeability dimensions and characteristics 24.1 General nominal specifications . 24.2 Gas springs of type 1 700 and 3 200 34.3 Gas springs of type 3 500 and 15 000 . 34.4 Gas springs of type 24 000 to 200 000 . 35 Filling pressure .106 Marking .117 Technical de
9、livery conditions 118 Designation .11Bibliography .13BS ISO 11901-3:2014ISO 11901-3:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried ou
10、t 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-governmental, in liaison with ISO, also take part in the work. ISO co
11、llaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different appr
12、oval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the s
13、ubject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any tr
14、ade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the T
15、echnical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 29, Small tools, Subcommittee SC 8, Tools for pressing and moulding.ISO 11901 consists of the following parts, under the general title Tools for pressing
16、Gas springs: Part 1: General specifications Part 2: Specification of accessories Part 3: Gas spring with increased spring force and compact built height Part 4: Gas springs with increased spring force and same built heightiv ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11901-3:2014(E)Introduct
17、ionThe 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. ISO 2014 All rights reserved vBS ISO 11901-3:2014BS ISO 11901-3:2014Tools for pressing Gas springs Part 3: Gas spring with increased spring force and
18、compact built height1 ScopeThis part of ISO 11901 specifies the dimensions (in millimetres), nominal initial forces and types of gas springs.It is applicable to gas springs with increased spring force and compact built height of type 1 700 to 200 000, pressurized with nitrogen with a nominal initial
19、 force of between 1 700 N 5 % and 200 000 N 5 %, for use in press tools.It also specifies marking, technical delivery conditions and designation.NOTE Specifications of mounting accessories for gas springs are given in ISO 11901-2.2 Normative referencesThe following documents, in whole or in part, ar
20、e normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appliesISO 7-1, Pipe threads where pressure-tight joints are mad
21、e on the threads Part 1: Dimensions, tolerances and designationISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications3 Description and terminologySee Figure 1.INTERNATIONAL STANDARD ISO 11901-3:2014(E) ISO 2014 All rights reserved
22、 1BS ISO 11901-3:2014ISO 11901-3:2014(E)Key1 rod2 positive stop3 valveaPressure filling inlet.bForce.cNitrogen.Figure 1 TerminologyThe gas spring is an autonomous spring pressurized with nitrogen.At rest position, the rod is pushed out.This gas spring feature has a gas inlet for pressurization or de
23、pressurization. The inlet is located on the casing or on the bottom and is capped.The pressure filling inlet of gas springs of type of at least 42 000 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 less than 42 000 includes an
24、M6 thread.4 Interchangeability dimensions and characteristics4.1 General nominal specificationsSee Table 1.2 ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11901-3:2014(E)Table 1 General nominal specificationsTypeNominal initial force NMaximum filling pressure MPaEnd of stroke nomi-nal force inc
25、rease coefficient1 700 1 7005 %181,63 200 3 200 1,63 500 3 500 1,55 000 5 000151,57 500 7 500 1,610 000 10 000 1,615 000 15 000 1,624 000 24 000 1,642 000 42 000 1,666 000 66 000 1,595 000 95 000 1,5200 000 200 000 1,54.2 Gas springs of type 1 700 and 3 200See Figure 2 and Table 2.4.3 Gas springs of
26、 type 3 500 and 15 000See Figures 3 and 5 and Tables 3 and 4.4.4 Gas springs of type 24 000 to 200 000See Figures 4 and 5 and Tables 3 and 4. ISO 2014 All rights reserved 3BS ISO 11901-3:2014ISO 11901-3:2014(E)General tolerance: ISO 2768-maPressure filling inlet.Figure 2 Gas springs of type 1 700 an
27、d 3 2004 ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11901-3:2014(E)Table 2 Dimensions of gas springs of type 1 700 and 3 200 Maximum filling pressure 18 MPaDimensions in millimetresTypeNominal strokeL l1l6r d D D1s 0,2501+01+0,3010,1 70010 501 16 111 19 1715 6025 8038 10650 13063 15680 19510
28、0 235125 2853 20010 5015 25 2315 6025 8038 10650 13063 15680 195100 235125 285 ISO 2014 All rights reserved 5BS ISO 11901-3:2014ISO 11901-3:2014(E)General tolerance: ISO 2768-ma Pressure filling inlet.Figure 3 Gas springs of type 3 500 to 15 0006 ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11
29、901-3:2014(E)General tolerance: ISO 2768-ma Pressure filling inlet.Figure 4 Gas springs of type 24 000 to 200 000 ISO 2014 All rights reserved 7BS ISO 11901-3:2014ISO 11901-3:2014(E)Table 3 Dimensions of gas springs of type 3 500 to 200 000 Maximum filling pressure 18 MPa for type 3 500 and 15 MPa f
30、or type 5 000 to 200 000Dimensions in millimetresTypeNominal strokeL l1l2l3l4l5l6r d D D1d1D2Number of holess 0,25 min0015+ ,min min 0,3010,3 50010 502 3,5 4 2,5 6 10,5 1 16 32 30 M6 20 213 5616 6225 8038 10650 13063 15680 190100 230125 2805 00010 502 3,5 4 2,5 6 10,5 1 20 38 36 M6 20 213 5616 6225
31、8038 10650 13063 15680 190100 230125 2807 50013 582 3,5 4 2,5 6 14,5 1 25 45 43 M8 20 225 8238 10850 13263 15880 192100 232125 28210 00013 643 5 8 3,5 6 14,5 2 28 50 46 M8 20 225 8838 11450 13863 16480 198100 238125 2888 ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11901-3:2014(E)TypeNominal s
32、trokeL l1l2l3l4l5l6r d D D1d1D2Number of holess 0,25 min0015+ ,min min 0,3010,15 00013 703 5 8 3,5 6 16 2 36 63 59 M8 20 225 9438 12050 14463 17080 204100 244125 29424 00025 953 5 8 4 6 18 2,5 45 75 70 M8 40 438 12150 14563 17180 205100 245125 29542 00025 1083 5 8 4 12 21 2,5 60 95 90 M8 60 438 1345
33、0 15863 18480 218100 258125 30866 00025 1183 5 8 4 12 22,5 2,5 75 120 115 M10 80 438 14450 16863 19480 228100 268125 31895 00025 1283 5 8 4 13 24,5 2,5 90 150 145 M10 100 438 15450 17863 20480 238100 278125 328Table 3 (continued) ISO 2014 All rights reserved 9BS ISO 11901-3:2014ISO 11901-3:2014(E)Ty
34、peNominal strokeL l1l2l3l4l5l6r d D D1d1D2Number of holess 0,25 min0015+ ,min min 0,3010,200 00025 1603 8 8 4 16 30,5 2,5 130 195 190 M12 120 438 18650 21063 23680 270100 310125 3605 Filling pressurePressure filling inlet, a, is M6 for gas springs of type 1 700 to 24 000 and ISO 7 - Rp 1/8 in accord
35、ance with ISO 7-1 for gas springs of type 42 000 to 200 000 (see Figure 5 and Table 4).For gas springs of type 1 700 and 3 200 the pressure filling inlet is located on the bottom.aPressure filling inlet.Figure 5 Filling pressure inletTable 3 (continued)10 ISO 2014 All rights reservedBS ISO 11901-3:2
36、014ISO 11901-3:2014(E)Table 4 Location of pressure filling inletTypeDistance to inlet, M mm3 500 65 000 67 500 610 000 615 000 624 000 642 000 10,566 000 10,595 000 10,5200 000 156 MarkingGas springs shall be labelled in an indelible way, with at least the following information:a) the manufacturers
37、name;b) the gas used;c) the date of manufacture;d) the maximum filling pressure;e) the type.7 Technical delivery conditionsGas 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 foll
38、owing formulae:pt= p0(1 + 0,003 6 t) whereptis the nitrogen pressure, in megapascals, at temperature t;p0is the nitrogen pressure, in megapascals, at reference temperature;t is the temperature variation.The rod shall be slightly oiled and protected against shocks.8 DesignationA gas spring in accorda
39、nce with this part of ISO 11901 shall be designated by: “Gas spring”; reference to this part of ISO 11901, i.e. ISO 11901-3; ISO 2014 All rights reserved 11BS ISO 11901-3:2014ISO 11901-3:2014(E) the type; the nominal stroke, in millimetres; the location of the pressure filling inlet for gas spring o
40、f type 1 700 to 3 200.EXAMPLE A gas spring of type 15 000, nominal stroke of 25 mm is designated as follows:Gas spring ISO 11901-3 - 15 000 2512 ISO 2014 All rights reservedBS ISO 11901-3:2014ISO 11901-3:2014(E)Bibliography1 ISO 11901-2, Tools for pressing Gas springs Part 2: Specification of access
41、ories2 Council directive 97/23/CE “Pressure equipment” ISO 2014 All rights reserved 13BS ISO 11901-3:2014ISO 11901-3:2014(E) ISO 2014 All rights reservedICS 25.120.10Price based on 13 pagesThis page deliberately left blankBSI is the national body responsible for preparing British Standards and other
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