1、April 2016 English price group 7No 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!%QE“2469734www.din.deDIN
2、EN ISO 7623Steel cord conveyor belts Cord-to-coating bond test Initial test and after thermal treatment (ISO 7623:2015);English version EN ISO 7623:2015,English translation of DIN EN ISO 7623:2016-04Stahlseil-Frdergurte Haftung zwischen den Seilen und der Kernschicht Prfung im Anlieferungszustand un
3、d nach thermischer Behandlung (ISO 7623:2015);Englische Fassung EN ISO 7623:2015,Englische bersetzung von DIN EN ISO 7623:2016-04Courroies transporteuses cbles dacier Adhrence des cbles dans lenrobage Essais ltat original et aprs traitement thermique (ISO 7623:2015);Version anglaise EN ISO 7623:2015
4、,Traduction anglaise de DIN EN ISO 7623:2016-04SupersedesDIN EN ISO 7623:1997-08www.beuth.deDocument comprises 11 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.16 DIN EN ISO 7623:2016-04 2 A comma is used as the decimal ma
5、rker. National 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” (Secretariat: SNV, Switzerland). The responsible German body involved in its prep
6、aration was DIN-Normenausschuss Kautschuktechnik (DIN Standards Committee Rubber Technology), Working Committee NA 045-02-05 AA Frdergurte (Spiegelgremium zu CEN/TC 188, ISO/TC 41/SC 3). The DIN Standard corresponding to the International Standard referred to in this document is as follows: ISO 7622
7、-2 DIN EN ISO 7622-2 Amendments This standard differs from DIN EN ISO 7623:1997-08 as follows: a) the standard has been editorially and technically revised; b) in Clause 2 “Normative references”, ISO 471 has been replaced by ISO 18573; c) in Clause 10, Figure 1 has been editorially revised; d) in Cl
8、ause 10, Figure 2 has been added. Previous editions DIN EN ISO 7623: 1997-08 National Annex NA (informative) Bibliography DIN EN ISO 7622-2, Steel cord conveyor belts Longitudinal traction test Part 2: Measurement of tensile strength EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7623 Nove
9、mber 2015 ICS 53.040.20 Supersedes EN ISO 7623:1997English Version Steel cord conveyor belts - Cord-to-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 ther
10、mique (ISO 7623:2015) Stahlseil-Frdergurte - Haftung zwischen den Seilen und Kernschicht - Prfung im Anlieferzustand 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 Regulati
11、ons 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 member.
12、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. CEN m
13、embers 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, Poland, Por
14、tugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited 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 in any f
15、orm and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7623:2015 EEuropean foreword .31 Scope . 52 Normative references 53 Principle 54 Apparatus . 55 Test conditions . 56 Specimens 67 Conditioning 68 Procedure. 69 Expression of results 710 Test report . 7Contents PageDIN
16、EN ISO 7623:2016-04 EN ISO 7623:2015 (E)2Foreword .4European 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
17、 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 conflicting national standards shall be withdrawn at the latest by May 2016. Attention is drawn to the possibility that some of
18、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 supersedes EN ISO 7623:1997. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
19、 following countries 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, Netherla
20、nds, Norway, Poland, 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. DIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)3 ForewordISO (the In
21、ternational Organization for Standardization) is a worldwide federation 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 h
22、as 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 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical
23、 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 approval criteria needed for the different types of ISO documents should be noted. This document was drafted in ac
24、cordance 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 subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Det
25、ails 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 trade name used in this document is information given for the convenience of users and does not constitute an
26、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 Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee re
27、sponsible for this document is ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts.This third edition cancels and replaces the second edition (ISO 7623:1996), which has been technically revised.DIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)4 1 ScopeThis International S
28、tandard 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 referencesThe following documents, in whole or in part, are normatively
29、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 18573, Conveyor belts Test atmospheres and conditioning periodsISO
30、 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 the axis of the cord.4 Apparatus4.1 Dynamometric tensile testing m
31、achine 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.5 Test conditionsUnless otherwise specified and cited in the test
32、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 five days after manufacture of the belt.5.2 Test after thermal treat
33、ment, 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 about 1 MPa but not exceeding 5 MPa.If different temperatures or press
34、ures 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 platens of the press.DIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)5 6
35、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 5 mm in diameter, or 450 mm for cords over 5 mm in diameter;b) width: such that the sp
36、ecimen 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, corresponding to the diameter, D, of the warp CordsDimensions in millimetresDD 2 2 D 5 5 DL25 1 5
37、0 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 as possible to the test area (see Figure 1 or Figure 2).On the other side, cut the fo
38、ur 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-tested.7 ConditioningCondition the test specimens, selected in accordance with Clause
39、 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 250 mm 10 mm.Place the ends of the specimens between the jaws and, for jaws with self-
40、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 until the steel cord is completely torn out.NOTE The highest tractive force, which is de
41、fined as the tear-out force.Repeat the test on the two other specimens.DIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)6 9 Expression of resultsCalculate the arithmetical mean value of the tear-out force, expressed in newtons, of the three specimens tested in Formula (1)FFFF=+1233(1)The cord-to-coating
42、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) reference to this International Standard, i.e. ISO 7623;b) identification of the belt tested and whether it
43、 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 the test relative humidity if other than 50 %;e) details of any departure from the Standard thermal treatm
44、ent specified in 5.2.DIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)7 Dimensions in millimetres123410 min.LSLmin: 350 or 450Key1 warp cords2 test specimen width3 test length4 test specimen thicknessFigure 1 Specimen for the bond test of the steel cord to its coatingDIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)8 Dimensions in millimetres1LSLmin: 350 or 450Key1 cutting point at the centre cordFigure 2 Simple test specimenDIN EN ISO 7623:2016-04 EN ISO 7623:2015 (E)9
