1、June 2014Translation 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 25.
2、100.70; 19.120!%2Q4“2154617www.din.deDDIN ISO 9284Abrasive grains Test-sieving machines (ISO 9284:2013),English translation of DIN ISO 9284:2014-06Schleifmittelkrnungen Prfsiebmaschinen (ISO 9284:2013),Englische bersetzung von DIN ISO 9284:2014-06Grains abrasifs Machine tamiser de contrle (ISO 9284:
3、2013),Traduction anglaise de DIN ISO 9284:2014-06SupersedesDIN ISO 9284:1996-09www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 8 pages05.14 A comma is used as the decimal marker. Contents Page 2DIN ISO 9284:2014-06National foreword .3 N
4、ational Annex NA (informative) Bibliography .4 1 Scope .5 2 Normative references .5 3 Operational requirements 5 4 Technical description .5 5 Technical requirements 7 5.1 Nest of test sieves and sieve frames 7 5.2 Sieving time.7 6 Installation of test-sieving machines7 7 Checking of test-sieving mac
5、hines 7 8 Maintenance of test-sieving machines .7 National foreword This document (ISO 9284:2013) has been prepared by Technical Committee ISO/TC 29 “Small tools”, Subcommittee SC 5 “Grinding wheels and abrasives”, Working Group WG 7 “Grain characteristics”. This Working Group is responsible for the
6、 preparation of standards concerning grains of fused aluminium oxide and silicon carbide for bonded abrasives, coated abrasives and chip removal operations with loose abrasive grains, including standards concerning the designation, grain size distribution, sampling, analysis, testing or determinatio
7、n of physical properties. The responsible German body involved in its preparation was the Normenausschuss Werkzeuge und Spann-zeuge (Tools and Clamping Devices Standards Committee), Working Committee NA 121-04-06 AA Krnungen. Attention is drawn to the possibility that some of the elements of this do
8、cument may be the subject of patent rights. DIN and/or DKE shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 6344-1 DIN ISO 6344-1 ISO 6344-2 DIN ISO 6344-2 ISO
9、8486-1 DIN ISO 8486-1 Amendments This standard differs from DIN ISO 9284:1996-09 as follows: a) normative references have been updated. Previous editions DIN ISO 9284: 1996-09 DIN 69109: 1985-12 3DIN ISO 9284:2014-064DIN ISO 9284:2014-06National Annex NA (informative) Bibliography DIN ISO 6344-1, Co
10、ated abrasives Grain size analysis Part 1: Grain size distribution test DIN ISO 6344-2, Coated abrasives Grain size analysis Part 2: Determination of grain size distribution of macrogrits P 12 to P 220 DIN ISO 8486-1, Bonded abrasives Determination and designation of grain size distribution Part 1:
11、Macrogrits F4 to F220 1 ScopeThis International Standard specifies the operational and technical requirements of, and gives guidance on, the installation, checking and maintenance of test-sieving machines.Test-sieving machines are used for determining the size distribution of bonded and coated abras
12、ive macrograins.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 applies. For undated references, the latest edition of the referenced document (incl
13、uding any amendments) applies.ISO 2591-1:1988, Test sieving Part 1: Methods using test sieves of woven wire cloth and perforated metal plateISO 6344-1, Coated abrasives Grain size analysis Part 1: Grain size distribution testISO 6344-2, Coated abrasives Grain size analysis Part 2: Determination of g
14、rain size distribution of macrogrits P12 to P220ISO 8486-1, Bonded abrasives Determination and designation of grain size distribution Part 1: Macrogrits F4 to F2203 Operational requirementsUnder defined operating conditions, mechanical test sieving can produce results comparable with those obtained
15、by manual sieving.The results obtained by using test-sieving machines shall be reproducible and shall comply with the requirements specified 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 sie
16、ving is ensured only when the appropriate test-sieving machines, test sieves and operating instructions are used.4 Technical descriptionExamples 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 mot
17、or;c) gear drive for the conversion of the rotary motion of the motor into the specified eccentric rotary motion of the nest of sieves 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 giv
18、en unit of time on the cover of the nest of sieves);Abrasive grains Test-sieving machines 5DIN ISO 9284:2014-06f) retainer for 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
19、 cork), on which the tapper strikes.In addition, the following are necessary for the operation of test-sieving machines: base plate; a nest of five test sieves; bottom pan.a) Type A b) Type BKey1 tapper 1 tapper2 cork plug 2 cork plug3 test sieves 3 test sieves4 bottom pan 4 bottom pan5 fixing screw
20、s for bottom plate 9 cover6 electric motor block 10 bottom plate7 gear drive 11 fixing screws8 base plateNOTE This figure illustrates typical commercially available test-sieving machines, type A and type B.Figure 1 Examples of test-sieving machinesN1) National footnote: RO-TAP is the trade name of a
21、 suitable test-sieving machine. For more detailed information, please contact your national standardization body. This information is given for the convenience of users of this Standard and does not constitute an endorsement by DIN of the product named. N1) 6DIN ISO 9284:2014-065 Technical requireme
22、nts5.1 Nest of test sieves and sieve framesThe nest of test sieves shall be mounted 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
23、 following dimensions:a) diameter, 200 mm;b) height, 50 mm.The nest of test sieves to be used for a particular type of macrograin shall be as specified in the applicable standard.5.2 Sieving timeThe test-sieving machines shall be provided with a time switch to guarantee that sieving is carried out f
24、or the prescribed time period.6 Installation of test-sieving machinesThe 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 exampl
25、e, the type A test-sieving machine (see Figure 1) shall be fixed on 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 s
26、hould be placed on a vibration-absorbing board, made, for example, 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 b
27、e installed in such a way that the forces and moments, which occur 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-si
28、eving machinesThe efficiency of test-sieving machines shall be 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 machinesIn order to maintain the efficiency and operational reliability of
29、 test-sieving machines, it is recommended that the manufacturers instructions concerning maintenance are followed.7DIN ISO 9284:2014-06Dimensions in millimetresKey1 concrete2 vibration-absorbing board (e.g. hard felt)3 outline of test sieving machine4 groundaThree assembly bolts, thread M10.Figure 2 Baseplate and mating dimensions for the assembly of test-sieving machines, type A8DIN ISO 9284:2014-06
