1、BRITISH STANDARD Coated abrasives - Grain size analysis - Part 1: Grain size distribution test ICs 25.100.70 BS IS0 6344-1: 1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS IS0 6344-1:1998 WNo. 1OW This British Standard, having ben prepared under the direciion of the En
2、gineering Sector Board, was published under the authority of the standards Board and comes into effect on 16 August 1998 Date comments July 1999 Indicated by a sidehe d BSI 07-1999 ISBN O 680 30269 6 National foreword This British standard reproduces verbatim Is0 6344-1:1998 and implements it as the
3、 UK national standard The K participation in its prepamion was entrusted to Technid commiaee -13, Grinding wheels, - present to the responsible intemationaPEuropean committee any enquiries on the intmpretation, or proposals for change, and keep the K interests - monitor related intemajona and Europe
4、an developments and promulgate infomied; hemintheUK. A list of organizations represented on thic committee can be obtained on request to its secretaty. Cross-references The British Standards which implement intemational or European publications referred to in this document may be found in the BSI St
5、andards Catalogue under the section entitied international Standards Correspondence Index”, or by using the %dW facility of the BSI Standards Electronic Catalogue. A British standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for
6、 their correct application. Compliance with a British Standard does not of itself confer immunity from legs) obligatione. Summary of pages This document comprises a front cover, an inside front cover, the Is0 titie page, page ii, pages i to 6, an inside back cover and a back cover. The BSI copyright
7、 notice displayed luoughout this document indicates when the document was last issued. - STD-BSI BS IS0 b344-1-ENGL 1998 Lb2Vbb9 07853q3 75T W BS IS0 6344-1:1998 INTERNATIONAL STANDARD IS0 63444 Firs! edition imao4-15 corrected and reprinted 199902-01 Coated abrasives - Grain size analysis - Part 1:
8、 Grain size distribution test Abrasifs appliqus - Gmnubmtrie - Partie 1: Contrble de la distributkm granubmdtdque Reference number IS0 6344-1:1998(E) BS IS0 6344-11998 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member
9、 bodies). The work of preparing International Standards is normally carried out through IS0 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. International organizations, governmental
10、 and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical Committees are circulated to the member
11、 bodies for voting. Publication as an Intemational Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 6344-1 was prepared by Technical Committee ISO/TC 29, Small tools, subcommittee SC 5, Grinding wheels and abrasives. IS0 6344 consists of the
12、 following parts, under the general title Coated abrasifs - Grain size analysis: - Part I: Grain size disribution test - Part 2: Detemination of grain size distribution of macrogrits P12 to P220 - Part 3: Determination of grain size distribution of microgrits P240 to P2500 Annex A of this pari of IS
13、0 6344 is for information only. Descriptors: tools, abrasives. grain size analysis, tests, determination, size classification, definitions. ii - STD-BSI BS IS0 b3qq-L-ENGL 1778 O Lb2LibbS 0705795 522 BS IS0 6344-1:1998 Coated abrasives - Grain size analysis - Part 1: Grain size distribution test 1 S
14、cope This part of IS0 6344 sets forth definitions and grain size distribution test for electro-fused aluminium oxide and silicon carbide grits for coated abrasives, .e.: - macrogrits P12 to P220 - microgrits P240 to P2500 Tests for grain site distribution analysis are defined in IS0 6344-2 for macro
15、grits and in IS0 6344-3 for microgrits. This part of IS0 6344 applies both to those grits used in the manufacture of coated abrasive products and to those grits recovered from products for test purposes. 2 Normative references The following standards contain provisions which, through reference in th
16、is text, constitute provisions of this part of IS0 6344. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part os Is0 6344 are encouraged to invesgate the possibility of applying the most recent dins of the
17、standards indicated below. Members of IEC and Is0 maintain registers of currently valid Intemationai Standards. IS0 6344-2:1998, Coated abmsives - Grain size anaiysis - PaR2: DetemmreaOn of gram size distribution of macrogrits P12 to P220. IS0 6344-3:1998, Coated abrasives - Grain size analysis - P8
18、rt3: eetminabn of grain sire distribution of IS0 8486-2:1996, Bonded abrasives - Determination and designation of grain size distribution - Patt2: Microgris F23 to FlZOO. microgris P240 to P2m. IS0 B284:1092, Abrasive gmm - Test-sieving machines. 3 efinitions 3.1 Macrogrits: Abrasive grits of diamet
19、er between 3,351 mm and 0,053 mm whose grain size distribution is determined by sieving. 3.2 Microgrits: Abrasive grits having a median equivalent diameter (see 4.2 and 4.3) from 58,s prn to 8,4 pm whose grain size distribution is determined by sedimentation. 3.3 Grain size distribution: Percentage
20、of grains of different sizes composing the macrognt or microgrit, I Cg BSI 07-1999 1 BS IS0 6344-1:1998 4 Grain size distribution testing 4.1 Macrogrits Macrogrits are defined as those grits whose grain size distribution is determined by means of sieving .e. by residues on or grains passing through
21、the test sieves corresponding to the nest of sieves shown in table 1. In the case of internai operational tests the macrogris are determined on common use utility test sieves by comparative sieving with mastergrits (MG). The mastergrits are made of fused aluminium oxide. They are checked at the Staa
22、tliche Materialpriifungsanstalt Dannstadt (MPA) on the reference RO-TAP test sieving machine in accordance with IS0 9284, with their precisely calibrated series of reference sieves, on which the mastergrits (MG) are checked. These test sieves correspond to the nominal dimensions of the aperture sire
23、s in accordance with the test sieve designation table 1. They are optically measured and considered as reference basis for the testing of grain sizes for coated abrasive products. Utility test sieves (table 1) are test sieves for the intemal operational testing of macrogrits for coated abrasive prod
24、ucts. They must achieve reproducible test results in the test with mastergrits. - For the assessment of the sieving results the values from testing with utility test sieves must be related to the mastergrit values resulting from the testing with reference test sieves. The grain sire distribution of
25、grits when sieved through the specified test sieves shall meet the following criteria: - that no grains shall be retained on the first test sieve .e. the residue pi = O, - that the residue Q2 does not exceed the maximum value specified for test sieve 2, - that the sum Q3 of the residues on test siev
26、es 1 , 2 and 3 and the sum Q, of the residues on test sieves 1 , 2, 3 and 4 are within the specif tolerances, - that the sum Q5 of the residues on test sieves 1,2,3,4 and 5 is not less than the specified minimum value, - that the difference AQ (remainder in the pan) between the sum of the residues Q
27、s and the total weight of the sample does not exceed the specified maximum value. 1) Mastergrits can be obtained by: Staatliche MatenaiprfunpnstaH Darmshdl. Grafenstrae 2,064283 Darmstadt. ThW information is given for the convenience of users of this part of IS0 6344 and does not constitute an endor
28、sement by IS0 of ttie product named. Equivalent products may be used if they can be shown to lead to the same results. 2 O BSI 07-1 999 4.2 Microgrits P240 to P1200 Microgrits are defined as grain whose size distribution is determined by sedimentation. For the grain size distribution of microgrits P
29、 240 to P 1 200 the following criteria have to be met: - the maximum grain size (equivalent grain diameter) of the first sedimented grain ( 710 1414 - 600 850 1414 8616 61 19 61 19 I * 425 61 19 92 I a I I I 14251 4218 I I 1: 355 2616 8616 75 I 9 61 I 9 P60 500 pz P150 75 i 9 * 96 o -250 3 o - 212 1
30、 o -150 7 61 19 8616 - 125 4218 - 106 - 106 2616 - 90 O 1 - 11251 3 75i9 %I 4 I P180 I - I150 o I - Ilosl 2 - 1901 1515 I - I75 621 12 I L 1 I I I - 75 1515 - 63 621 12 o -902 Table 2 - Grain size distribution of microgrits -40 to Pl200 _ _ I NOTE - These values apply only to measurement by means of
31、 the US-sedimentometer accordins to IS0 8486-2. 1 4 Table 3 - Grain size distribution of the microgrits Pl500 to P2500 d,-value max. Grit &-value1 ) designation Median grain size dsw-value dLW-value min. Pl500 mo00 I I um I um I um I um 58 25,8 12,6 1 83 58 22.4 10.3 f 0.8 6.7 I m500 I 58 I 19,3 I 8
32、,4*0,5 I 5,4 NOTE -These values apply only to measurement by means of the US-sedimentometer according to IS0 8486-2. 1) Determined on the basis of the standard deviations resuitina from an IS0 round robin test. 5 STD-BSI BS IS0 b3qq-L-ENGL L77a LbZq004 0785750 77T BS IS0 6344-1:1998 Annex A (informa
33、tive) Bibliograph y l IS0 565:1990, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings. 2 IS0 331 0-1 :A), Test sieves - Technical requirements and testing - fart 1: Test sieves of metal wire cloth. 3 IS0 91 38:1993, Abrasive grains - Sampling
34、and splitting. 2) To be published. (Revision of IS0 331 O: 1990) 6 STDOBSI BS IS0 b344-2-ENGL 2998 = LbZLibbS 0765940 T4O W BS IS0 6344-1: 1998 BSI 389ChiswickHighRoad London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards.
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