ISO-7590-2009.pdf
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1、 Reference number ISO 7590:2009(E) ISO 2009 INTERNATIONAL STANDARD ISO 7590 Fifth edition 2009-01-15 Steel cord conveyor belts Methods for the determination of total thickness and cover thickness Courroies transporteuses cbles dacier Mthodes de dtermination de lpaisseur totale et de lpaisseur des re
2、vtements Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/08/2009 03:44:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7590:2009(E) PDF disclaimer This PDF file may c
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5、parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2009 Al
6、l rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country
7、of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reserved Copyright International Organization for Standardization Provided by IHS under licens
8、e with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/08/2009 03:44:40 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 7590:2009(E) ISO 2009 All rights reserved iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of
9、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. Inte
10、rnational 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. International Standards are drafted in accordance with th
11、e rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval b
12、y at least 75 % of the member bodies casting a vote. 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. ISO 7590 was prepared by Technical Committee ISO
13、/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts. This fifth edition cancels and replaces the fourth edition (ISO 7590:2001), which has been technically revised. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=
14、HP Monitoring/1111111164 Not for Resale, 04/08/2009 03:44:40 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/08/2009 03:44:40
15、 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 7590:2009(E) ISO 2009 All rights reserved 1 Steel cord conveyor belts Methods for the determination of total thickness and cover thickness 1 Scope This International Standard specifies three methods
16、 for the measurement of total belt thickness and the thickness of covers of steel cord conveyor belts. Methods A1 and A2 (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 f
17、or the measurement of cover thickness only. It is not suitable if there is a textile or metal weft, nor if the ends of 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
18、the cover 2.2 weft transverse layer or layers included to reinforce the carcass of the belt and not regarded as part of 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)
19、 by removing the covers, taking further measurements at the same specified points and calculating each of the cover thicknesses 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 gradu
20、ated 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 test specimen. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/08/2009 03:44:40 M
21、DTNo reproduction or networking permitted without license from IHS -,-,- ISO 7590:2009(E) 2 ISO 2009 All rights reserved 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
22、 8 times. 5 Procedure 5.1 General If the adhesion strength between 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
23、, the same test piece may be used for the determination of cover 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 Measur
24、ement points If the belt width, B, is less than or equal to 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 Figu
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