1、November 2013Translation by DIN-Sprachendienst.English price group 6No 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
2、 53.040.20!%*,k“2070972www.din.deDDIN EN ISO 7622-1Steel cord conveyor belts Longitudinal traction test Part 1: Measurement of elongation (ISO 7622-1:2013);English version EN ISO 7622-1:2013,English translation of DIN EN ISO 7622-1:2013-11Stahlseilfrdergurte Zugversuch in Lngsrichtung Teil 1: Dehnun
3、gs-Messung (ISO 7622-1:2013);Englische Fassung EN ISO 7622-1:2013,Englische bersetzung von DIN EN ISO 7622-1:2013-11Courroies transporteuses cbles dacier Essai de traction dans le sens longitudinal Partie 1: Mesurage de lallongement (ISO 7622-1:2013);Version anglaise EN ISO 7622-1:2013,Traduction an
4、glaise de DIN EN ISO 7622-1:2013-11SupersedesDIN EN ISO 7622-1:1995-11www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 9 pages10.13 DIN EN ISO 7622-1:2013-11 2 A comma is used as the decimal marker. National foreword This document has be
5、en prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)” (Secretariat: SAC, China), SC 3 “Conveyor belts” (Secretariat: SAC, China and JISC, Japan) and has been taken over as EN ISO 7622-1:2013 by Technical Committee CEN/TC 188 “Conveyor belts” (Secretariat: SNV, Switzer
6、land). The responsible German body involved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Working Committee NA 045-02-05 AA Frdergurte. Amendments This standard differs from DIN EN ISO 7622-1:1995-11 as follows: a) the standard has been editoria
7、lly revised. Previous editions DIN EN ISO 7622-1: 1995-11 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 7622-1 May 2013 ICS 53.040.20 Supersedes EN ISO 7622-1:1995English Version Steel cord conveyor belts - Longitudinal traction test - Part 1: Measurement of elongation (ISO 7622-1:2013) C
8、ourroies transporteuses cbles dacier - Essai de traction dans le sens longitudinal - Partie 1: Mesurage de lallongement (ISO 7622-1:2013) This European Standard was approved by CEN on 2 April 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
9、ns 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. This European Standard exists in
10、 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 members are the national standard
11、s 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, Portugal, Romania, Slovakia, Sloven
12、ia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for
13、 CEN national Members. Ref. No. EN ISO 7622-1:2013: EStahlseilfrdergurte - Zugversuch in Lngsrichtung - Teil 1: Dehnungs-Messung (ISO 7622-1:2013) Contents Page Foreword . 3 Introduction . 4 1 Scope . 5 2 Normative references. 5 3 Principle 5 4 Apparatus 5 5 Test specimens 6 6 Procedure 6 7 Expressi
14、on of results . 7 8 Test report . 7 2DIN EN ISO 7622-1:2013-11EN ISO 7622-1:2013 (E)This document (EN ISO 7622-1:2013) 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
15、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 November 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the
16、 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 supersedes EN ISO 7622-1:1995. According to the CEN-CENELEC Internal Regulations, the national st
17、andards organizations of the 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,
18、 Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 7622-1:2013 has been approved by CEN as EN ISO 7622-1:2013 without any modification. Foreword3DIN EN ISO 7622-1:2013-1
19、1EN ISO 7622-1:2013 (E)IntroductionThis test method is intended to verify, by destructive testing, the elongation properties 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 iss
20、ued by the cord manufacturer.Differences in elongation can occur between raw steel cords and rubber-coated steel cords. For this reason, the values determined in accordance with this method and the values stated in a certificate of the cord manufacturer can differ.4DIN EN ISO 7622-1:2013-11EN ISO 76
21、22-1:2013 (E)1 ScopeThis part of ISO 7622 specifies a method for the determination of the elongation of steel cords constituting the carcass of conveyor belts, when subjected to a force corresponding to 10 % and 60 % of the specified tensile strength.It applies exclusively to conveyor belts with a s
22、teel carcass.NOTE A method for the determination of tensile strength is specified in ISO 7622-2.2 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 appl
23、ies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 18573, Conveyor belts Test atmospheres and conditioning periods3 PrincipleThe traction test is carried out on a steel cord, taken from the carcass of the belt. Determination of the elong
24、ation is measured using an extensometer, at 10 % and 60 % of the specified tensile strength, by using, for example, a dynamometer, the rate of separation of the jaw of which is specified and maintained constant.4 Apparatus4.1 Dynamometric tensile testing machine, complying with the following require
25、ments:a) the force exerted by the machine shall be adaptable to the strength of the test specimen;b) it shall be possible for the rate of separation of the jaws to be set at 25 mm/min 5 mm/min and be maintained constant;c) the separation between the jaws shall be capable of being at least 250 mm.4.2
26、 Device for holding the test specimen cord, such that it is impossible for the test specimen to slip during the test.Two fixed grooved pulleys of diameter at least either 50 mm or 10 times the cord diameter, d (see Figure 1), constituting the upper and lower holding device, can be used, for example.
27、5DIN EN ISO 7622-1:2013-11EN ISO 7622-1:2013 (E)Figure 1 Device for holding the test specimen cord4.3 Extensometer, accurate to at least 0,01 %.As the elongation of steel cords is generally very low, accurate, but sensitive, extensometers, which could be damaged if the test specimen should break, ha
28、ve to be used. For this reason, the measurement is limited to 60 % of the specified tensile strength.It is preferable that an extensometer be able to accommodate the cord rotation which occurs due to its twisted nature.4.4 Device for recording the curve of traction force as a function of elongation,
29、 if available.5 Test specimensPrepare four specimens (two S-twist and two Z-twist) as follows:a) take a sample at least 400 mm long from the belt;b) using a knife, cut the compound between the layer of cords and the remainder of the belt;c) then cut the compound so as to isolate the cords from the c
30、entral part and extract four cords, taking care not to subject them to any tensile stress;d) strip the rubber coating from the whole cord length or at least from the area at the end of each of these cords that is to be placed in the holding device.6 ProcedureCarry out four tests at least five days a
31、fter manufacture of the belt.Unless otherwise specified, in which case note this fact in the report, carry out the test at 23 C 2 C and at 50 % 5 % relative humidity in accordance with ISO 18573, Atmosphere B.6DIN EN ISO 7622-1:2013-11EN ISO 7622-1:2013 (E)Place the ends of the cord on the holding d
32、evice, as follows:a) fix one end on the upper device;b) fix the other end on the lower device, and apply an initial tractive force equal to 50 times the linear density (mass per metre) of the cord (this is to define the zero point of the registration curve clearly);c) position the two jaws of the ex
33、tensometer with a separation of between 100 mm and 300 mm.Start the dynamometer, with the rate of separation of the jaws maintained constant at 25 mm/min 5 mm/min.Record and note the elongations at 10 % and 60 % of the specified minimum tensile strength of the belt in the number of cords.7 Expressio
34、n of resultsExpress the elongation as a percentage of the initial length.Take as the result the arithmetic mean value of the four measurements made at 10 % and at 60 % of the specified minimum tensile strength.Express the result to the nearest 0,1 %.8 Test reportThe test report shall contain the fol
35、lowing information:a) a reference to this part of ISO 7622, i.e. ISO 7622-1;b) the mean values of elongation at 10 % and 60 % of the specified minimum tensile strength, in accordance with Clause 7;c) 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.7DIN EN ISO 7622-1:2013-11EN ISO 7622-1:2013 (E)
