1、BRITISH STANDARD BS ISO 9136-1:2004 Abrasive grains Determination of bulk density Part 1: Macrogrits ICS 25.100.70 BS ISO 9136-1:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 February 2005 BSI 16 February 2005 ISBN 0 580 45469 X Nat
2、ional foreword This British Standard reproduces verbatim ISO 9136-1:2004 and implements it as the UK national standard. It supersedes BS 7425-1:1991 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MTE/13, Grinding wheels, abrasive tools, paper and clo
3、ths, and powders, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under
4、 the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct appli
5、cation. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mo
6、nitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 5 and a back cover. The BSI copyright notice displayed in this document i
7、ndicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 9136-1:2004(E) OSI 4002INTERNATIONAL STANDARD ISO 9136-1 First edition 2004-10-15 Abrasive grains Determination of bulk density Part 1: Macrogrits Grains abrasifs Dtermination
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13、gsr esedevrBSISO91361:2004IS-6319 O1:(4002E) I SO 4002 All irthgs ersedevr iiiForeword 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 IS
14、O 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 and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates c
15、losely with the International Electrotechnical Commission (IEC) on all matters 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. D
16、raft International Standards adopted by the technical committees are circulated 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 do
17、cument may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 9136-1 was prepared by Technical Committee ISO/TC 29, Small tools, Subcommittee SC 5, Grinding wheels and abrasives. This first edition of ISO 9136-1 cancels and replaces
18、ISO 9136:1989, the contents of which have been technically revised. ISO 9136 consists of the following parts, under the general title Abrasive grains Determination of bulk density: Part 1: Macrogrits Part 2: Microgrits BSISO91361:2004blank 4002:16319OSISBINTENRATIONAL TSANDADR IS-6319 O1:(4002E)I SO
19、 4002 All irthgs ersedevr 1Abrasive grains Determination of bulk density Part 1: Macrogrits 1 Scope This part of ISO 9136 specifies a test method for the determination of the bulk density of bonded and coated abrasive macrogrits. 2 Normative references The following referenced documents are indispen
20、sable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 6344-1, Coated abrasives Grain size analysis Part 1: Grain size distribution test ISO 8486-1
21、, Bonded abrasives Determination and designation of grain size distribution Part 1: Macrogrits F4 to F220 ISO 9136-2, Abrasive grains Determination of bulk density Part 2: Microgrits 3 Definitions For the purposes of this document, the definitions given in ISO 6344-1, ISO 8486-1 and ISO 9136-2 apply
22、. 4 Apparatus 4.1 General The test apparatus is illustrated in Figure 1 and Annex A. It consists of the elements listed in 4.2 to 4.6. 4.2 Stand An exact description of the stand is not necessary. The only requirement is that it be capable of holding the funnel in a vertical position so that the dim
23、ension between the outlet of the funnel and the bottom of the measuring cylinder is 138 1 mm. 4.3 Funnel The slope of the funnel shall be such that fine grains will not adhere to the sides. By preference, the funnel shall be made of stainless steel with smooth inside seams. Its dimensional character
24、istics (see also Figure 1) shall be as follows: BSISO91361:2004IS-6319 O1:(4002E) 2 I SO 4002 All irthgs ersedevr total height of funnel: 240 mm; diameter of top: 160 mm; inside diameter of the cylindrical outlet: 20 mm 0,5 mm; height of the cylindrical outlet area: 40 mm 1 mm. 4.4 Funnel release va
25、lve An exact description of the funnel release valve is not necessary. The only requirement is that quick opening of the valve be ensured. Figure 1 illustrates an example of a swinging stopper release valve. 4.5 Measuring cylinder The measuring cylinder is cylindrical with a polished inner surface a
26、nd features a volume V of (200 0,5) cm 3 ; this volume is determined by an inner diameter of 64 mm and an inner height of 62,2 mm. The measuring cylinder is placed centrally under the stream emmanating from the vibration channel. The height of fall of the macrogrits to be tested (from the upper edge
27、 of the channel bottom to the bottom of the measuring cylinder) shall be (138 1) mm. 4.6 Overspill tray The overspill tray with a flat bottom serves as a collector for overflowing macrogrits. The measuring beaker is placed in the drip tray. 5 Calibration of the measuring cylinder Calibration of the
28、measuring cylinder can be achieved by the following two methods. The volume of the measuring cylinder shall be checked regularly. Method A The dry, empty measuring cylinder is weighed together with a flat glass plate. The measuring cylinder is filled with water and the glass plate placed on the cyli
29、nder in such a way that no air bubbles are present. The glass plate is held in this position, the surplus water removed and the total weight determined. The volume is calculated as follows: 2 0 HO m V = (1) where V is the volume of the measuring cylinder, in cubic centimetres; m 0is the mass of wate
30、r, in grams; H 2 Ois the density of water, in grams per cubic centimetre, at the measuring temperature, see Table 1. Method B The volume is calculated by measuring the internal dimensions of the cylinder (margin of error 0,001 mm). BSISO91361:2004IS-6319 O1:(4002E) I SO 4002 All irthgs ersedevr 3Tab
31、le 1 Density of purified water Temperature C Density g/cm 3Temperature C Density g/cm 318 0,998 593 26 0,996 780 20 0,998 201 28 0,996 230 22 0,997 767 24 0,997 293 30 0,995 643 6 Method of measurement 6.1 Preparation of samples For grain sizes F100 or P100 and finer, dry the abrasive grains at a te
32、mperature of 110 C for 1 h and then, prior to measurement, cool them to room temperature. Coarser grains shall be dry at room temperature. 6.2 Procedure Fill a 250 ml beaker to the top with the abrasive grains to be tested. With the funnel outlet closed and the measuring cylinder centering under the
33、 outlet of the funnel, pour the grains into the funnel. Open the outlet of the funnel and allow the grains to fall freely until the funnel is empty. Avoid vibrations throughout this procedure. The test material heaped above the rim of the measuring cylinder shall be removed using a straight blade wi
34、th the leading edge at an angle of approximately 45 to the rim of the measuring beaker (see Figure 2). Vibration shall be avoided throughout the measuring procedure (risk of compaction). The measuring cylinder filled with macrogrits shall be weighed to within 0,01 g. 7 Expression of results 7.1 Meth
35、od of calculation Calculate the bulk density Bas follows: 1 B m V = (2) where Bis the bulk density, in grams per cubic centimetre; m 1is the mass of grains contained in the measuring cylinder, in grams; V is the volume of the cylinder, in cubic centimetres. 7.2 Repeatability Duplicate determinations
36、 by the same operator and apparatus shall not differ by more than 0,02 g/cm 3 . BSISO91361:2004IS-6319 O1:(4002E) 4 I SO 4002 All irthgs ersedevrDimensions in millimetres Key 1 funnel 5 overspill dish 2 funnel stand height adjustment 6 measuring cylinder 3 stand 7 release valve (closed) 4 bottom pla
37、te aOutlet diameter. Figure 1 Apparatus for the determination of the bulk density of abrasive macrograins Dimensions in millimetres Key 1 straight blade aMoving direction. Figure 2 Procedure for removing the heaped material BSISO91361:2004IS-6319 O1:(4002E) I SO 4002 All irthgs ersedevr 5Annex A (in
38、formative) Apparatus for the determination of the bulk density of macrogrits Key 1 overspill tray 2 measuring cylinder 3 stand 4 funnel Figure A.1 Apparatus for the determination of the bulk density of macrogrits BSISO91361:2004BS ISO 9136-1:2004 BSI 389 Chiswick High Road London W4 4AL BSI British
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