1、March 2010 Translation by DIN-Sprachendienst.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 5
2、3.040.20!$a6A“1621930www.din.deDDIN EN ISO 7590Steel cord conveyor belts Methods for the determination of total thickness and cover thickness(ISO 7590:2009)English translation of DIN EN ISO 7590:2010-03Stahlseil-Frdergurte Messung der Gesamtdicke und der Deckplattendicke (ISO 7590:2009)Englische ber
3、setzung von DIN EN ISO 7590:2010-03Courroies transporteuses cbles dacier Mthodes de dtermination de lepaisseur totale et de lepaisseur des revtements(ISO 7590:2009)Traduction anglaise de DIN EN ISO 7590:2010-03SupersedesDIN EN ISO 7590:2001-06www.beuth.deIn case of doubt, the German-language origina
4、l shall be considered authoritative.Document comprises 12 pages03.10 DIN EN ISO 7590:2010-03 2 A comma is used as the decimal marker. National foreword This document was prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)”, Subcommittee SC 3 “Conveyor belts” (Secretaria
5、t: BSI, United Kingdom) and has been adopted as EN ISO 7590:2009 by Technical Committee CEN/TC 188 “Conveyor belts” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Working Co
6、mmittee NA 045-02-05 AA Frdergurte. The DIN Standard corresponding to the International Standard referred to in clause 2 of this document is as follows: ISO 8094 DIN DIN EN 28094 Amendments This standard differs from DIN EN ISO 7590:2001-06 as follows: a) The standard has been brought in line with t
7、he current rules of presentation. b) The standard has been editorially revised. Previous editions DIN EN ISO 7590: 2001-06 National Annex NA (informative) Bibliography DIN EN 28094, Steel cord conveyor belts Adhesion strength test of the cover to the core layer EUROPEAN STANDARD NORME EUROPENNE EURO
8、PISCHE NORM EN ISO 7590 January 2009 ICS 53.040.20 Supersedes EN ISO 7590:2001English Version Steel cord conveyor belts - Methods for the determination of total thickness and cover thickness (ISO 7590:2009) Courroies transporteuses cbles dacier - Mthodes de dtermination de lpaisseur totale et de lpa
9、isseur des revtements (ISO 7590:2009) Stahlseil-Frdergurte - Messung der Gesamtdicke und der Deckplattendicke (ISO 7590:2009) This European Standard was approved by CEN on 3 January 2009. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giv
10、ing 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 Management Centre or to any CEN member. This European Standard exists in three official ve
11、rsions (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgi
12、um, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR
13、STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 7590:2009: EContents Page Foreword .3 1 Sco
14、pe4 2 Terms and definitions .4 3 Principle .4 4 Apparatus.4 4.1 Dial gauge micrometer for methods A1 and A2 .4 4.2 Optical measuring instrument for method B5 5 Procedure.5 5.1 General .5 5.2 Measurement points5 5.3 Test pieces and test specimens 5 5.3.1 General .5 5.3.2 Test pieces and test specimen
15、s for method A1.5 5.3.3 Test specimens for method A2 6 5.3.4 Test specimens for method B 6 5.4 Measurement of thickness .6 5.4.1 Method A1 6 5.4.2 Method A2 7 5.4.3 Method B 8 6 Test report8 Bibliography10 2 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03 Foreword 3 EN ISO 7590:2009 (E) DIN EN ISO 7590
16、:2010-03 secretariat of which is held by BSI. 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 July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. Attention
17、 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 supersedes EN ISO 7590:2001. According to the CEN/CENELEC Internal Regulations, t
18、he national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, N
19、orway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7590:2009 has been approved by CEN as a EN ISO 7590:2009 without any modification. This document (EN ISO 7590:2009) has been prepared by Technical Committee ISO
20、/TC 41 “Pulleys and belts (including veebelts)” in collaboration with Technical Committee CEN/TC 188 “Conveyor belts” the 1 Scope This International Standard specifies three methods for the measurement of total belt thickness and the thickness of covers of steel cord conveyor belts. Methods A1 and A
21、2 (micrometer methods) can be used for all steel cord conveyor belts for the measurement of both total belt thickness and cover thickness. Method B (optical method) is recommended for the measurement of cover thickness only. It is not suitable if there is a textile or metal weft, nor if the ends of
22、the steel cords become twisted when cut. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 breaker reinforcement included in the cover 2.2 weft transverse layer or layers included to reinforce the carcass of the belt and not regarded as part of
23、 the cover layer 3 Principle The total thickness is measured using a micrometer at a number of specified points depending on belt width. The cover thicknesses are measured either a) by removing the covers, taking further measurements at the same specified points and calculating each of the cover thi
24、cknesses by subtraction, or b) by direct measurement using an optical measuring instrument. 4 Apparatus 4.1 Dial gauge micrometer for methods A1 and A2 The instrument shall be graduated every 0,1 mm with flat feet and a circular foot of 10 mm in diameter that exerts a pressure of (22 5) kPa on the t
25、est specimen. 4 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03 4.2 Optical measuring instrument for method B The instrument shall comprises a hand-held magnifying glass with a scale divided in 0,1 mm steps. The magnification shall be at least 8 times. 5 Procedure 5.1 General If the adhesion strength b
26、etween cover and core layer is measured in accordance with ISO 8094, the same test pieces may be used for the determination of cover thickness described in method A1. If the position of the steel cord is measured in accordance with EN 13827, the same test piece may be used for the determination of c
27、over thickness described in method A2. If the use of methods A1 and A2 is impractical, the visible belt end or the end of a laboratory sample of the belt may be used for the determination of cover thickness described in method B. 5.2 Measurement points If the belt width, B, is less than or equal to
28、1 000 mm, measure the thickness at three points spaced equidistantly over the belt width see Figure 1 a). If the belt width, B, is greater than 1 000 mm, measure the thickness at five points spaced equidistantly over the belt width see Figure 1 b). a) Belt width B u 1 000 mm b) Belt width B 1 000 mm
29、 Figure 1 Location of measurement points 5.3 Test pieces and test specimens 5.3.1 General Cut a rectangular test piece across the full belt width, at 90 to the belt edge, with dimensions as specified in 5.3.2 to 5.3.4, as appropriate. 5.3.2 Test pieces and test specimens for method A1 The test piece
30、 shall be approximately 150 mm in length. As appropriate, cut three or five test specimens from the test piece at the measurement points specified in 5.2. Each test specimen shall be two cord pitches wide i.e. of a width equal to the width that comprises two cords (see Figure 2) and shall have a len
31、gth of approximately 150 mm. 5 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03 Dimensions in millimetres Key 1 measurement point 2 test specimen Figure 2 Test specimens taken at the measurement points and cut from a full-width belt sample 5.3.3 Test specimens for method A2 The test specimen shall be no
32、t less than 50 mm in length with a width equal to the total width of the belt. Mark on the test specimen the measurement points specified in 5.2. 5.3.4 Test specimens for method B The test shall be carried out either on the end of the conveyor belt in situ, or on a test specimen not less than 50 mm
33、in length. In either case, the cut edge shall be at 90 to the surface of the belt and the cords shall be visible and free from contamination, the cord ends being cleaned, if necessary. Mark on the test specimen the measurement points specified in 5.2. 5.4 Measurement of thickness 5.4.1 Method A1 5.4
34、.1.1 Measurement of total thickness Measure the total thickness, s1, of the test specimen at each of the measurement points specified in 5.2. 5.4.1.2 Measurement of top cover thickness Remove the top cover down to the two cords (see Figure 3). Measure the dimension s7at the measurement points shown
35、in Figure 1. Take measurements directly above the cord, ensuring that the micrometer foot is in contact with either the surface of the cord see Figure 3 a) or the surface of the weft see Figure 3 b). Calculate the thickness of the top cover, s2, at each measurement point, using Equation (1): 217s ss
36、= (1) 6 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03 5.4.1.3 Measurement of bottom cover thickness After carrying out the procedure described in 5.4.1.2, remove the bottom cover. Measure the dimension s8as described in 5.4.1.2, ensuring that the measurement points are located over the cords. Calcula
37、te the thickness of the bottom cover, s3, at each measurement point, using Equation (2): 378s ss= (2) 5.4.1.4 Calculation and expression of results Calculate the arithmetic mean of three or five thicknesses, as appropriate, for s1, s2and s3, as determined in 5.4.1.1, 5.4.1.2 and 5.4.1.3. Express the
38、 results in millimetres. a) Cross-section of a test specimen without weft, with or without breaker b) Cross-section of a test specimen with weft Figure 3 Test specimens for method A1 5.4.2 Method A2 5.4.2.1 Measurement of total thickness Measure the total thickness, s1, of the test specimen at each
39、of the measurement points specified in 5.2. 5.4.2.2 Measurement of top cover thickness Remove a section of 20 mm in length from the top cover over the entire width of the test specimen (see Figure 4). Measure the thickness, s7, at the same points as in 5.4.2.1. Take measurements directly above the c
40、ord, ensuring that the micrometer foot is in contact with either the surface of the cord see Figure 4 a) or the surface of the weft see Figure 4 b). Calculate the thickness of the top cover, s2, at each measurement point, using Equation (1). 5.4.2.3 Measurement of bottom cover thickness After carryi
41、ng out the procedure described in 5.4.2.2, remove the bottom cover. Measure the dimension s8as described in 5.4.2.2, ensuring that the measurement points are located over the cords. Calculate the thickness of the bottom cover, s3, at each measurement point, using Equation (2). 7 EN ISO 7590:2009 (E)
42、 DIN EN ISO 7590:2010-03 Dimensions in millimetres a) Cross-section of a test specimen without weft, with or without breaker b) Cross-section of a test specimen with weft Key 1 breaker 2 weft 3 cord Figure 4 Test specimens for method A2 5.4.2.4 Calculation and expression of results Calculate the ari
43、thmetic mean of three or five thicknesses, as appropriate, for s1, s2and s3, as determined in 5.4.2.1, 5.4.2.2 and 5.4.2.3. Express the results in millimetres. 5.4.3 Method B 5.4.3.1 Measurement of top and bottom cover thicknesses Using the optical measuring instrument (see 4.2), measure the distanc
44、e between the top edge of the cord and the surface of the belt at each of the measurement points specified in 5.2, ensuring that the measuring scale is in physical contact with the belt. Record the thicknesses of the top cover, s2, and bottom cover, s3, at each measurement point. 5.4.3.2 Calculation
45、 and expression of results Calculate the arithmetic mean of three or five thicknesses, as appropriate, for s2and s3, as determined in 5.4.3.1. Express the results in millimetres. 6 Test report The test report shall contain at least the following information: a) reference to this International Standa
46、rd (ISO 7590:2008); b) method used, i.e. A1, A2 or B, as appropriate; c) identification of the conveyor belt tested; 8 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03 d) number of measurement points; e) test results, as given in 5.4.1.4, 5.4.2.4 or 5.4.3.2, as appropriate; f) date of the test. 9 EN ISO
47、 7590:2009 (E) DIN EN ISO 7590:2010-03 Bibliography 1 ISO 8094, Steel cord conveyor belts Adhesion strength test of the cover to the core layer 2 EN 13827, Steel cord conveyor belts Determination of the lateral and vertical displacement of steel cords 10 EN ISO 7590:2009 (E) DIN EN ISO 7590:2010-03
