1、BSI Standards PublicationBS EN ISO 7623:2015Steel cord conveyor belts Cord-to-coating bond test Initial test and after thermaltreatmentBS EN ISO 7623:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 7623:2015.It supersedes BS EN ISO 7623:1997 which is wi
2、thdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/67, Conveyor belts.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 ar
3、e responsible for its correctapplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 85378 4ICS 53.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theSta
4、ndards Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7623 November 2015 ICS 53.040.20 Supersedes EN ISO 7623:1997English Version Steel cord conveyor belts - Cord-to-
5、coating bond test - Initial test and after thermal treatment (ISO 7623:2015) Courroies transporteuses cbles dacier - Adhrence des cbles dans lenrobage - Essais ltat original et aprs traitement thermique (ISO 7623:2015) Stahlseil-Frdergurte - Haftung zwischen den Seilen und Kernschicht - Prfung im An
6、lieferzustand und nach thermischer Behandlung (ISO 7623:2015) This European Standard was approved by CEN on 26 September 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard
7、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 member. This European Standard exists in three official versions (English, French, German). A version in any ot
8、her 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. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic
9、, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMM
10、ITTEE 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 in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7623:2015 EBS EN ISO
11、7623:2015EN ISO 7623:2015 (E) 3 European foreword This document (EN ISO 7623:2015) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)“ in collaboration with Technical Committee CEN/TC 188 “Conveyor belts” the secretariat of which is held by SNV. This European
12、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 conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of the elements of this
13、 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 supersedes EN ISO 7623:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries
14、 are bound to implement this European Standard: 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, Poland,
15、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7623:2015 has been approved by CEN as EN ISO 7623:2015 without any modification. BS EN ISO 7623:2015ISO 7623:2015(E)Foreword iv1 Scope . 12 Normative references 13 Pr
16、inciple 14 Apparatus . 15 Test conditions . 16 Specimens 27 Conditioning 28 Procedure. 29 Expression of results 310 Test report . 3 ISO 2015 All rights reserved iiiContents PageBS EN ISO 7623:2015ISO 7623:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federati
17、on of national standards bodies (ISO member bodies). 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
18、. International organizations, governmental and non-governmental, 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.The procedures used to develop this document and tho
19、se intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular 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 (
20、see www.iso.org/directives). 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. Details of any patent rights identified during the development of the do
21、cument will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.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 a
22、nd expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 41, Pulleys and belts (includin
23、g veebelts), Subcommittee SC 3, Conveyor belts.This third edition cancels and replaces the second edition (ISO 7623:1996), which has been technically revised.iv ISO 2015 All rights reservedBS EN ISO 7623:2015INTERNATIONAL STANDARD ISO 7623:2015(E)Steel cord conveyor belts Cord-to-coating bond test I
24、nitial test and after thermal treatment1 ScopeThis International Standard specifies a method for determining the bond strength of metal cords to their surrounding coating, either in the initial state or after thermal treatment.It applies exclusively to metal-carcass conveyor belts.2 Normative refere
25、ncesThe 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, the latest edition of the referenced document (including any amendments) applies.ISO
26、18573, Conveyor belts Test atmospheres and conditioning periodsISO 7622-2, Steel cord conveyor belts Longitudinal traction test Part 2: Measurement of tensile strength3 PrincipleMeasurement of the force required to tear one of the steel warp cords out of the carcass by applying tensile stress along
27、the axis of the cord.4 Apparatus4.1 Dynamometric tensile testing machine with jaws, in accordance with that described in ISO 7622-2.4.2 Press, having two heated platens, temperature controlled to 145 C 5 C, and capable of applying a pressure on the specimen (see Clause 6) of between 1 MPa and 5 MPa.
28、5 Test conditionsUnless otherwise specified and cited in the test report, the tests shall be carried out at a temperature of 23 C 2 C and at a relative humidity of (50 5) %, in accordance with ISO 18573, Atmosphere B.5.1 Test in the initial state, carry out the test described in Clause 8 at least fi
29、ve days after manufacture of the belt.5.2 Test after thermal treatment, carry out the test described in Clause 8 after thermal treatment of a sample of the belt by heating it between the two platens of the press (4.2) for 150 min 1 min, at a temperature of 145 C 5 C and at a surface pressure of abou
30、t 1 MPa but not exceeding 5 MPa.If different temperatures or pressures or the duration of their application are used, details should be specified in the test report.NOTE An adequate surface pressure can be obtained using spacers of a thickness of the belt test piece minus 1 mm 0,5 mm between the pla
31、tens of the press. ISO 2015 All rights reserved 1BS EN ISO 7623:2015ISO 7623:2015(E)6 SpecimensTake from the sample of the belt piece undergoing thermal treatment, or not, three specimens of the following dimensions:a) length in the longitudinal direction of the belt, SL min: 350 mm for cords up to
32、5 mm in diameter, or 450 mm for cords over 5 mm in diameter;b) width: such that the specimen contains five warp cords;c) thickness: thickness of the belt including both covers.In the centre of the specimen, trace the limits of the test length L, defined in Table 1.Table 1 Test length, L, correspondi
33、ng to the diameter, D, of the warp CordsDimensions in millimetresDD 2 2 D 5 5 DL25 1 50 2 100 2Using a knife, remove the cover and weft, if any, along at least 10 mm on either side of the test length L, so that the five warp cords are laid bare on both sides.On one side, cut the centre cord as close
34、 as possible to the test area (see Figure 1 or Figure 2).On the other side, cut the four cords on either side of the centre cord, as close as possible to the test area (see Figure 1 or Figure 2).With a knife, detach the coating at the ends of the cut cords.Take care not to damage the cord to be bond
35、-tested.7 ConditioningCondition the test specimens, selected in accordance with Clause 6, for a period of not less than 3 h at 23 C 2 C and (50 5) relative humidity, immediately prior to testing in accordance with Clause 8.8 ProcedureSet the distance between the jaws of the testing machine (4.1) at
36、250 mm 10 mm.Place the ends of the specimens between the jaws and, for jaws with self-tightening wedges, check that the various Parts of these jaws move freely and smoothly.Apply a continuous tensile stress to the specimen (with no pauses) at a speed of (100 10) mm/min.Maintain the tractive force un
37、til the steel cord is completely torn out.NOTE The highest tractive force, which is defined as the tear-out force.Repeat the test on the two other specimens.2 ISO 2015 All rights reservedBS EN ISO 7623:2015ISO 7623:2015(E)9 Expression of resultsCalculate the arithmetical mean value of the tear-out f
38、orce, expressed in newtons, of the three specimens tested in Formula (1)FFFF=+1233(1)The cord-to-coating bond strength, A, is expressed in newtons per millimetre by Formula (2)AFL= (2)whereL is the test length in millimetres.10 Test reportThe test report shall contain the following information:a) re
39、ference to this International Standard, i.e. ISO 7623;b) identification of the belt tested and whether it is in the initial state or thermally treated state, or another state see e);c) cord-to-coating bond strength, expressed as indicated in Clause 9;d) the test temperature if other than 23 C, and t
40、he test relative humidity if other than 50 %;e) details of any departure from the Standard thermal treatment specified in 5.2. ISO 2015 All rights reserved 3BS EN ISO 7623:2015ISO 7623:2015(E)Dimensions in millimetres123410 min.LSLmin: 350 or 450Key1 warp cords2 test specimen width3 test length4 tes
41、t specimen thicknessFigure 1 Specimen for the bond test of the steel cord to its coating4 ISO 2015 All rights reservedBS EN ISO 7623:2015ISO 7623:2015(E)Dimensions in millimetres1LSLmin: 350 or 450Key1 cutting point at the centre cordFigure 2 Simple test specimen ISO 2015 All rights reserved 5This p
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