1、April 2016 English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 53.040.20!%Q=“2469726www.din.deDIN
2、EN ISO 7622-2Steel cord conveyor belts Longitudinal traction test Part 2: Measurement of tensile strength (ISO 7622-2:2015);English version EN ISO 7622-2:2015,English translation of DIN EN ISO 7622-2:2016-04Stahlseilfrdergurte Zugversuch in Lngsrichtung Teil 2: Messung der Zugfestigkeit (ISO 7622-2:
3、2015);Englische Fassung EN ISO 7622-2:2015,Englische bersetzung von DIN EN ISO 7622-2:2016-04Courroies transporteuses cbles dacier Essai de traction dans le sens longitudinal Partie 2: Mesurage de la rsistance la rupture (ISO 7622-2:2015);Version anglaise EN ISO 7622-2:2015,Traduction anglaise de DI
4、N EN ISO 7622-2:2016-04SupersedesDIN EN ISO 7622-2:1995-11www.beuth.deDocument comprises 12 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.16 DIN EN ISO 7622-2:2016-04 2 A comma is used as the decimal marker. National forew
5、ord This document (EN ISO 7622-2:2015) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)”, Subcommittee SC 3 “Conveyor belts” in collaboration with Technical Committee CEN/TC 188 “Conveyor belts” (Secretariat: SNV, Switzerland). The responsible German body in
6、volved in its preparation was DIN-Normenausschuss Elastomertechnik (DIN Standards Committee Elastomer Technology), Working Committee NA 045-02-05 AA 2 Frdergurte (Spiegelgremium zu CEN/TC 188, ISO/TC 41/SC 3). ISO 7622 consists of the following parts, under the general title Steel cord conveyor belt
7、s Longitudinal traction test: Part 1: Measurement of elongation Part 2: Measurement of tensile strength Amendments This standard differs from DIN EN ISO 7622-2:1995-11 as follows: a) the standard has been editorially and technically revised; b) Clause 2 has been updated; c) Table 1 has been included
8、 in Subclause 5.1; d) Subclause 5.4 “Test specimen, type C” has been added; e) Figure 4 for the test specimen type C has been included in Subclause 5.4; f) Clause 9 has been updated; g) Figures 1, 2 and 3 have been revised; Previous editions DIN EN ISO 7622-2: 1995-11 EUROPEAN STANDARD NORME EUROPEN
9、NE EUROPISCHE NORM EN ISO 7622-2 November 2015 ICS 53.040.20 Supersedes EN ISO 7622-2:1995English Version Steel cord conveyor belts - Longitudina l traction test -Part 2: Measurement of tensile strength (ISO 7622-2:2015) Courroies transporteuses cbles dacier - Essai de traction dans le sens longitud
10、inal - Partie 2: Mesurage de la rsistance la rupture (ISO 7622-2:2015) Stahlseilfrdergurte - Zugversuch in Lngsrichtung - Teil 2: Messung der Zugfestigkeit (ISO 7622-2:2015) This European Standard was approved by CEN on 31 October 2015. CEN members are bound to comply with the CEN/CENELEC Internal R
11、egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN m
12、ember. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions
13、. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola
14、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation
15、in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7622-2:2015 EEuropean foreword .3Introduction 51 Scope . 62 Normative references 63 Principle 64 Apparatus . 65 Test specimens 75.1 General . 75.2 Test specimen, type A 75.3 Test specimen, type B 85.4 Test spec
16、imen, type C 96 Conditioning of test specimens . 97 Procedure. 98 Expression of results .109 Test report 10Contents Page2DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)Foreword .4European foreword This document (EN ISO 7622-2:2015) has been prepared by Technical Committee ISO/TC 41 “Pulleys and bel
17、ts (including veebelts)” in collaboration with Technical CEN/TC 188 “Conveyor belts” the secretariat of which is held by SNV. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2016, and conflict
18、ing national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document sup
19、ersedes EN ISO 7622-2:1995. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republ
20、ic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7622-2:2015 has been app
21、roved by CEN as EN ISO 7622-2:2015 without any modification. 3DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (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
22、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-governmental, in liaison with ISO, also take part
23、in the work. ISO collaborates 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
24、 the different approval 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 do
25、cument may be the subject 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.
26、org/patents).Any trade 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
27、principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The committee responsible for this document is ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts.This second edition cancels and replaces the first editi
28、on (ISO 7622-2:1984), of which it constitutes a minor revision.ISO 7622 consists of the following parts, under the general title Steel cord conveyor belts Longitudinal traction test: Part 1: Measurement of elongation Part 2: Measurement of tensile strength4DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:201
29、5 (E)IntroductionThis test method is intended to verify, by destructive testing, the tensile strength of steel cords constituting the carcass of conveyor belts. As it is a destructive test, it is used only in the event of litigation or where no certificate of compliance is issued by the cord manufac
30、turer.5DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)1 ScopeThis part of ISO 7622 specifies a method for the determination of the tensile strength, in the longitudinal, of steel cords constituting the carcass of conveyor belts.It applies exclusively to conveyor belts with a steel carcass.NOTE A me
31、thod for the determination of elongation is specified in ISO 7622-1.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references,
32、 the latest edition of the referenced document (including any amendments) applies.ISO 18573, Conveyor belts Test atmospheres and conditioning periods3 PrincipleThe traction test for breaking a test specimen is prepared in such a way that only one of the warp cords is under stress.4 ApparatusDynamome
33、tric tensile testing machine, complying with the following requirements.a) The force exerted by the machine shall be adaptable to the strength of the test specimen. The testing machine capacity shall be such that the maximum testing load is 15 % to 85 % of the capacity of the machine.b) The rate of
34、separation of the jaws shall be capable of being set at (100 10) mm/min and shall be capable of being maintained constant.c) The separation between the jaws shall be capable of being set at least 250 mm.d) The form of the jaws shall be such that the test specimen is held perfectly and all possibilit
35、y of slipping during the test is eliminated. For this purpose, cross-ribbed jaws (see Figure 1), with the length of the ribbed part at least 80 mm, are recommended. A small amount of slippage is allowed for rubber elongation.6DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)1min. 80 mmKey1 detail of
36、ribbingFigure 1 Jaws5 Test specimens5.1 GeneralCut three test specimens of the following dimensions.a) Length (in the longitudinal direction of the belt): length shall be given as in Table 1.Table 1 Cord diameter and lengthDimensions in millimetresCord diameter Length0 to 3,9 5004,0 to 5,9 7006,0 to
37、 8,4 9008,5 to 10,4 1 20010,5 to 13,0 1 40013,1 to 15,0 1 500b) Width: such that the test specimen contains five warp cords.c) Thickness: that of the belt, including both covers (the ends may be buffed so that they are held more securely in the jaws). If the belt is too thick to be gripped in the ja
38、ws, some part of the cover can be cut off.d) Test specimens shall be cut parallel to the axis of the belt and at least 50 mm from the belt edge.e) Three types of test specimen (A, B, and C) may be used.5.2 Test specimen, type APrepare the test specimen type A shown in Figure 2 as follows.a) Remove t
39、he covers and weft, if any, along 50 mm in the centre of the sample, so that the five warp cords are laid bare on both sides.7DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)b) Using, for example, shears, cut the four cords on either side of the centre cord (take care not to damage the latter).c) Us
40、ing a knife, isolate the centre cord and its covering by cutting the compound parallel to this cord.Dimensions in millimetresL12350Key1 warp cords2 test specimen width3 test specimen thicknessL length of test specimenFigure 2 Test specimen type A5.3 Test specimen, type BPrepare the test specimen typ
41、e B shown in Figure 3 as follows.a) Remove the two outer cords over a length of 150 mm.b) Remove the two cords on either side of the centre cord over a minimum length of 50 mm, taking the precautions cited in 5.2.Dimensions in millimetresL50150KeyL length of test specimenFigure 3 Test specimen type
42、B8DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)5.4 Test specimen, type CPrepare the test specimen type C shown in Figure 4 as follows.a) Using, for example, shears, cut the four cords on either side of the centre cord (take care not to damage the latter).Dimensions in millimetres150 5LKey1 cuttin
43、g points across the warp cordsL length of test specimenFigure 4 Test specimen type C6 Conditioning of test specimensCondition the test specimens in accordance with ISO 18573, using atmosphere A or B, and carry out the tests immediately after completion of the conditioning period.7 ProcedureThe proce
44、dure shall be as follows.a) Place the ends of the test specimen (approximately 100 mm on either side) between the jaws. The five cords shall all be gripped. If the jaws have self-tightening corners, check that the various parts of these jaws move freely and smoothly.b) Also check that the test speci
45、men is correctly positioned in relation to the traction plane.c) Start the dynamometer, with the rate of separation of the jaws maintained constant at (100 10) mm/min.d) Note the tractive force at the moment of breaking.9DIN EN ISO 7622-2:2016-04 EN ISO 7622-2:2015 (E)8 Expression of resultsThe tens
46、ile strength, R, of the belt in the longitudinal direction, expressed in newtons per millimetre, is calculated by Formula (1):RFCb=(1)whereF is the mean value of the tensile breaking force, in newtons, given by Formula (2):FFFF=+1233(2)whereF1, F2, and F3are the tractive forces, at the moment of bre
47、aking, of the three test specimens, in newtons;C is the number of warp cords in the belt;b is the nominal width of the belt, in millimetres.The result of the calculation is the maximum theoretical value for the belt tested, not the effective tensile strength of this belt, which will be lower. The ef
48、fective tensile strength can be determined by using a corrective term taking into account the combined action between the cords in the belt.9 Test reportThe test report shall include the following information:a) reference to this part of ISO 7622, i.e. ISO 76222;b) identification of the belt tested;
49、c) type of test specimen used;d) temperature and relative humidity during the test;e) mean value, F, of the tensile breaking force, together with the individual values for each test specimen;f) tensile strength, R, calculated in accordance with Clause 8;g) any operating details not specified in this part of ISO 7622, or regarded as optional, together with any incidents likely to have influenced the results.10DIN EN ISO 7622-2:2016-0
