1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 9284:2013 Abrasive grains Test-sieving machinesBS ISO 9284:2013 BRITISH STANDARD National foreword This British Standard is the UK implementation of ISO 9284:2013. It s
2、upersedes BS 7425-4:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/13, Grinding wheels, abrasive tools, paper and cloths, and powders. A list of organizations represented on this committee can be obtained on request to its secretary. This pu
3、blication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013 ISBN 978 0 580 76012 9 ICS 19.120; 25.100.70 Compliance with a British Standard cannot
4、confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2013. Amendments issued since publication Date Text affectedBS ISO 9284:2013 ISO 2013 Abrasive grains Test-sieving machines Grains abrasifs Machi
5、ne tamiser de contrle INTERNATIONAL STANDARD ISO 9284 Second edition 2013-04-15 Reference number ISO 9284:2013(E)BS ISO 9284:2013ISO 9284:2013(E)ii ISO 2013 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2013 All rights reserved. Unless otherwise specified, no part of this publication may be r
6、eproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the reque
7、ster. 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 SwitzerlandBS ISO 9284:2013ISO 9284:2013(E) ISO 2013 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references 1 3
8、 Operational requirements . 1 4 Technical description 1 5 Technical requirements 3 5.1 Nest of test sieves and sieve frames 3 5.2 Sieving time . 3 6 Installation of test-sieving machines 3 7 Checking of test-sieving machines . 3 8 Maintenance of test-sieving machines . 3BS ISO 9284:2013ISO 9284:2013
9、(E) Foreword ISO (the International 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
10、 a technical committee has 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 mat
11、ters of electrotechnical standardization. International Standards are drafted in accordance with the 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 circu
12、lated to the member bodies for voting. Publication as an International Standard requires approval by 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 responsi
13、ble for identifying any or all such patent rights. ISO 9284 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 5, Grinding wheels and abrasives. This second edition cancels and replaces the first edition (ISO 9284:1992), of which it constitutes a minor revision. In particula
14、r, the normative references have been updated.iv ISO 2013 All rights reservedBS ISO 9284:2013INTERNATIONAL ST ANDARD ISO 9284:2013(E) Abrasive grains Test-sieving machines 1 Scope This International Standard specifies the operational and technical requirements of, and gives guidance on, the installa
15、tion, checking and maintenance of test-sieving machines. Test-sieving machines are used for determining the size distribution of bonded and coated abrasive macrograins. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensa
16、ble 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 2591-1:1988, Test sieving Part 1: Methods using test sieves of woven wire cloth and perforated metal plate ISO
17、6344-1, Coated abrasives Grain size analysis Part 1: Grain size distribution test ISO 6344-2, Coated abrasives Grain size analysis Part 2: Determination of grain size distribution of macrogrits P12 to P220 ISO 8486-1, Bonded abrasives Determination and designation of grain size distribution Part 1:
18、Macrogrits F4 to F220 3 Operational requirements Under defined operating conditions, mechanical test sieving can produce results comparable with those obtained by manual sieving. The results obtained by using test-sieving machines shall be reproducible and shall comply with the requirements specifie
19、d in ISO 2591-1, ISO 6344-1, ISO 6344-2 and ISO 8486-1. The reproducibility of the determination of the grain size distribution of abrasive grains by means of sieving is ensured only when the appropriate test-sieving machines, test sieves and operating instructions are used. 4 Technical description
20、Examples of test-sieving machines are given in Figure 1. Test-sieving machines usually consist of the following basic components: a) support and frame; b) electric motor; c) gear drive for the conversion of the rotary motion of the motor into the specified eccentric rotary motion of the nest of siev
21、es and into the tapping action; d) switch, which is actuated by means of a time switch; e) tapper for the execution of the vertical strokes (which are specified for a given unit of time on the cover of the nest of sieves); ISO 2013 All rights reserved 1BS ISO 9284:2013ISO 9284:2013(E) f) retainer fo
22、r the bottom pan and nest of sieves, which allows them to move in the specified manner; g) cover for the sieves, fitted with a funnel-shaped insert with a plug (usually made of cork), on which the tapper strikes. In addition, the following are necessary for the operation of test-sieving machines: ba
23、se plate; a nest of five test sieves; bottom pan. a) Type A b) Type B Key 1 tapper 1 tapper 2 cork plug 2 cork plug 3 test sieves 3 test sieves 4 bottom pan 4 bottom pan 5 fixing screws for bottom plate 9 cover 6 electric motor block 10 bottom plate 7 gear drive 11 fixing screws 8 base plate NOTE Th
24、is figure illustrates typical commercially available test-sieving machines, type A and type B. Figure 1 Examples of test-sieving machines2 ISO 2013 All rights reservedBS ISO 9284:2013ISO 9284:2013(E) 5 Technical requirements 5.1 Nest of test sieves and sieve frames The nest of test sieves shall be m
25、ounted in the sieving machine in such a way that the prescribed movements are possible without any obstruction. Attention shall be paid to the manufacturers recommendations. The sieve frames of the test sieves shall have the following dimensions: a) diameter, 200 mm; b) height, 50 mm. The nest of te
26、st sieves to be used for a particular type of macrograin shall be as specified in the applicable standard. 5.2 Sieving time The test-sieving machines shall be provided with a time switch to guarantee that sieving is carried out for the prescribed time period. 6 Installation of test-sieving machines
27、The test-sieving machine shall be fixed on to a suitable baseplate of sufficient mass in such a way that external vibrations cannot reach the machine. The test-sieving machine shall be installed so that it is horizontal. As an example, the type A test-sieving machine (see Figure 1) shall be fixed on
28、 a concrete baseplate having a width of at least 625 mm, a depth of 500 mm and a height of 550 mm. For the design of the concrete baseplate, as well as for the arrangement of the assembly bolts, see Figure 2. The concrete base-plate should be placed on a vibration-absorbing board, made, for example,
29、 of hard felt, which serves also to compensate for unevenness of the ground. The ground shall be free from vibrations, i.e. it should be natural soil. Where it is not possible to meet this requirement, the test-sieving machine should be installed in such a way that the forces and moments, which occu
30、r during the operation of the machine, are transmitted via the load-bearing structure to the foundations. If an acoustic cabinet is used, it shall not be attached to either the sieving machine or the concrete block. 7 Checking of test-sieving machines The efficiency of test-sieving machines shall be
31、 checked at appropriate intervals; in particular, the performance of the tapper and the precision of the time switch shall be checked. 8 Maintenance of test-sieving machines In order to maintain the efficiency and operational reliability of test-sieving machines, it is recommended that the manufactu
32、rers instructions concerning maintenance are followed. ISO 2013 All rights reserved 3BS ISO 9284:2013ISO 9284:2013(E) Dimensions in millimetres Key 1 concrete 2 vibration-absorbing board (e.g. hard felt) 3 outline of test sieving machine 4 ground a Three assembly bolts, thread M10. Figure 2 Baseplat
33、e and mating dimensions for the assembly of test-sieving machines, type A4 ISO 2013 All rights reservedBS ISO 9284:2013BS ISO 9284:2013ISO 9284:2013(E) ISO 2013 All rights reserved IC S 19.120;25.100.70 Price based on 4 pagesThis page deliberately left blankBSI is the independent national body respo
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