BS ISO 9352-2012 Plastics Determination of resistance to wear by abrasive wheels《塑料 利用砂轮的耐磨性测定》.pdf

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1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS ISO 9352:2012 Plastics Determination of resistance to wear by abrasive wheelsBS ISO 9352:2012 BRITISH STANDARD National foreword This British Standard is the UK implementat

2、ion of ISO 9352:2012. It supersedes BS 2782-3:Method 370:1996 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics. A list of organizations represented on this committee can be obtained on request to its secretary. This publicat

3、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012 ISBN 978 0 580 69495 0 ICS 83.080.01 Compliance with a British Standard cannot confer immunit

4、y from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 May 2012. Amendments issued since publication Date T e x t a f f e c t e dBS ISO 9352:2012 ISO 2012 Plastics Determination of resistance to wear by abrasive wheels P

5、lastiques Dtermination de la rsistance lusure par galets abrasifs INTERNATIONAL STANDARD ISO 9352 Third edition 2012-04-15 Reference number ISO 9352:2012(E)BS ISO 9352:2012ISO 9352:2012(E) ii ISO 2012 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2012 All rights reserved. Unless otherwise spe

6、cified, 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 of the requester. ISO copyright office

7、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 9352:2012ISO 9352:2012(E) ISO 2012 All rights reserved iii Contents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 T erms and definitions . 1

8、 4 Principle . 2 5 Apparatus 2 6 Test specimens 5 6.1 Shape and dimensions 5 6.2 Preparation of test specimens . 5 6.3 Cleaning of test specimens 5 6.4 Number of test specimens 5 7 Conditioning of test specimens 5 8 Procedure 5 9 Expression of results . 6 10 Precision 6 11 Test report . 7 Annex A (n

9、ormative) Determination of the abrasive power of the abrasive wheels 8 Bibliography . 9BS ISO 9352:2012ISO 9352:2012(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International St

10、andards 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. International organizations, governmental and non-governmental, in liaison with ISO, also

11、 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 the rules given in the ISO/IEC Directives, Part 2. The main task of technical committee

12、s 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 by at least 75 % of the member bodies casting a vote. Attention is drawn to the possib

13、ility 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 9352 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. This third edition cancel

14、s and replaces the second edition (ISO 9352:1995), which has been technically revised. iv ISO 2012 All rights reservedBS ISO 9352:2012INTERNATIONAL STANDARD ISO 9352:2012(E) Plastics Determination of resistance to wear by abrasive wheels 1 Scope 1.1 This International Standard specifies a general me

15、thod for determining the resistance to abrasive wear of plastics under the action of abrasive wheels. It is equally applicable to moulded test specimens, components and finished products. 1.2 The particular test conditions and the method of expressing the results may differ according to the type of

16、material. The test conditions and specific method are specified in the relevant standards for each material or product. This method is not applicable to cellular materials or paints. 2 Normative references The following referenced documents are indispensable for the application of this document. For

17、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) ISO 291, Plastics Standard atmosp

18、heres for conditioning and testing ISO 293, Plastics Compression moulding of test specimens of thermoplastic materials ISO 294-1, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimens ISO 295, Plastics

19、 Compression moulding of test specimens of thermosetting materials ISO 2818, Plastics Preparation of test specimens by machining ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method 3 T erms and definitio ns

20、 For the purposes of this document, the following terms and definitions apply. 3.1 abrasive wheel small grinding wheel or a roller faced with abrasive paper 3.2 abrasive wear progressive loss of material from the operating surface of a plastics material resulting from the cutting or scratching actio

21、n of the abrasive wheel ISO 2012 All rights reserved 1BS ISO 9352:2012ISO 9352:2012(E) 4 Principle Two abrasive wheels are applied to the test specimen with a specified load. The wear obtained after rotation of the test specimen through a specified number of revolutions is assessed by an appropriate

22、 procedure (e.g. mass loss, volume loss, change in optical properties). 5 Apparatus 5.1 Abrasion test machine. 5.1.1 The test specimen is placed on a motor-driven rotating disc. A pair of abrasive wheels is allowed to turn freely on their axis and is applied to the test specimen at a specified posit

23、ion under a specified load. Figure 1 illustrates the relative positions of these different components. The apparatus shall comply with the requirements given in 5.1.2 to 5.1.7. 5.1.2 The test specimen support disc shall be flat and fixed to its driving shaft. When the disc is rotated, no point on a

24、45 mm radius circle traced on its horizontal surface shall oscillate vertically through more than 0,05 mm about its mean position. The disc shall have a nominal diameter of 100 mm and its speed of rotation shall be 72 rev/min at 60 Hz and 60 rev/min at 50 Hz. 5.1.3 The abrasive wheels shall be suppo

25、rted by two symmetrical arms that can oscillate freely about a horizontal axis. The method of attaching the wheels shall permit free rotation, e.g. by means of ball bearings. In the test position, the mounting bosses shall be coaxial and positioned in such a way that the vertical projection of their

26、 common axis on to the plane of the test specimen support disc is 19,1 mm 0,1 mm from a parallel line passing through the axis of the disc (see Figure 1). The distance between the inside faces of the abrasive wheels shall be 52,4 mm 0,2 mm. Each arm shall be constructed in such a way as to permit th

27、e fitting of a counterweight to balance its mass against that of the abrasive wheel and additional loads of known mass (see 5.4). 5.1.4 The abrasive wheels shall have a cylindrical shape. They shall contain an axial hole allowing them to be fitted without play to the mounting bosses in the arms. The

28、y shall consist of one of the following two alternatives: a) An abrasive material (abrasive wheels). The thickness of the wheels shall be 12,7 mm 0,1 mm and their external diameter 51,6 mm 0,1 mm when new, but in no case less than 44,4 mm. b) A metal disc with its periphery clad with a 6 mm layer of

29、 vulcanized rubber of hardness 50 IRHD to 55 IRHD (international hardness in accordance with ISO 48) bonded without gaps or overlap with a strip of abrasive paper (for example, secured with the aid of double-sided adhesive tape). The abrasive wheel shall have a thickness of 12,7 mm 0,2 mm and a diam

30、eter of 51,6 mm 0,2 mm. The width of the abrasive paper shall be as specified in the relevant material (or product) standard. The quality of the abrasive wheel or abrasive paper to be used shall be as stated in each relevant material (or product) specification. Refer to Table 1 for guidance in selec

31、ting suitable abrasive wheels. The abrasive-power properties of the wheels may be characterized, if requested, by the procedure give in Annex A. 5.1.5 The vacuum device for removal of the wear debris shall include two exhaust nozzles above the test specimen wear zone. One nozzle shall be located bet

32、ween the abrasive wheels and the other shall be located diametrically opposite (see Figure 1). The bore of each nozzle shall have an internal diameter of 8 mm 0,5 mm and its distance from the test specimen shall be maintained at 1,5 mm 0,5 mm. When the nozzles are blocked closed, the pressure shall

33、be 1,5 kPa to 1,6 kPa. 2 ISO 2012 All rights reservedBS ISO 9352:2012ISO 9352:2012(E) Table 1 Abrasive wheel selection chart Series designation a Abrasive action Wheel type Composition Recommended load range Approximate grit size N (No. of abrasive particles/cm 2 ) CS10F Very mild Resilient Rubber a

34、nd abrasive grain 2,5 to 4,9 1 420 CS10 Mild Resilient Rubber and abrasive grain 4,9 to 9,8 1 420 CS17 Coarse Resilient Rubber and abrasive grain 4,9 to 9,8 645 H38 Very fine Non-resilient Vitrified 2,5; 4,9; 9.8 5 785 H10 Fine to medium Non-resilient Vitrified 4,9 to 9,8 1 160 H18 Medium to coarse

35、Non-resilient Vitrified 4,9 to 9,8 1 160 H22 Very coarse Non-resilient Vitrified 4,9 to 9,8 515 Under normal conditions, the “CS” series wheels shall be used when testing flexible specimens; the “H” series wheels shall be used for testing rigid specimens. CS10F wheels are subject to deterioration du

36、e to ageing of the rubber, especially in high-ozone atmospheres. It is therefore important to use these wheels before the expiration date on the wheel. When refacing (see 8.10), the recommended number of rotations for CS10, CS10F and CS17 wheels is 25 to 50. Results from two different wheels, even o

37、f the same type, might not always be comparable. aThe series designations correspond to those of abrading wheels produced by Taber Industries, North Tonawanda, New York, USA. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of Tabe

38、r Industries products. 5.1.6 The apparatus shall be equipped with a device enabling the test to be stopped after a predetermined number of revolutions of the rotating disc. 5.1.7 For testing thin specimens, or flexible plastics, the apparatus shall be equipped with a clamp ring to enable such specim

39、ens to be fitted on to the support disc. 5.2 Conditioning enclosure, permitting the maintenance of an atmosphere of 23 C 2 C and (50 5) % relative humidity, in accordance with ISO 291. 5.3 Standard zinc plates, for calibrating the abrasive power of the wheels (see Annex A). 5.4 Additional masses, fo

40、r loading each abrasive wheel to the requirements of the relevant material (or product) specification. 5.5 Apparatus for refacing the abrasive wheels, permitting the elimination of all refuse and at the same time assuring perpendicular contact between the specimen and the wheel. 5.6 Equipment for as

41、sessing the wear, in accordance with the relevant material (or product) specification. ISO 2012 All rights reserved 3BS ISO 9352:2012ISO 9352:2012(E) Dimensions in millimetres a) Side view b) Top view Key 1 abrasive wheel 4 hole, diameter 6,35 mm 2 test specimen 5 vacuum nozzles, diameter 8 mm 0,5 m

42、m 3 wear zone Figure 1 Diagrammatic arrangement of apparatus 4 ISO 2012 All rights reservedBS ISO 9352:2012ISO 9352:2012(E) 6 Test specimens 6.1 Shape and dimensions The test specimens shall be either discs of nominal diameter 100 mm; or octagons obtained by cutting off the corners of squares of nom

43、inal side length 100 mm, when the use of the clamp ring (see 5.1.7) is not necessary. Their thickness shall be uniform and between 0,5 mm and 10 mm. 6.2 Preparation of test specimens Test specimens may be obtained by moulding in accordance with ISO 293, ISO 294-1 or ISO 295, or by machining in accor

44、dance with ISO 2818. Each specimen shall contain a central hole of appropriate diameter to accommodate the stud of the rotating disc. 6.3 Cleaning of test specimens The test specimen surface shall be cleaned with the aid of a suitable neutral volatile solvent or mild soap solution, selected in accor

45、dance with the requirements of the relevant material (or product) specification or by agreement between the interested parties. WARNING Use of a cleaner (however volatile) might affect the abrasion characteristics. 6.4 Number of test specimens The number of test specimens shall be as stated in the r

46、elevant material (or product) specification. In the absence of any such indication, the minimum number shall be three. 7 Conditioning of test specimens The test specimens shall be conditioned in the enclosure (5.2) in accordance with the requirements of the relevant material (or product) specificati

47、on or, in the absence of such requirements, for a duration of at least 48 h before test. NOTE Certain specifications also specify the conditioning of the abrasive wheel or abrasive paper. 8 Procedure 8.1 The test shall be performed in the enclosure (5.2) in an environmentally controlled room having

48、the same characteristics. 8.2 For each test specimen, perform the preliminary measurements specified by the relevant material (or product) specification (see the warning in 8.3). 8.3 Fit the test specimen to the specimen carrier disc. WARNING During the course of the operations described in 8.2 and

49、8.3, take care not to contaminate t h e s u r f a c e t o b e t e s t e d , e . g . w i t h o i l f r o m fi n g e r c o n t a c t . ISO 2012 All rights reserved 5BS ISO 9352:2012ISO 9352:2012(E) 8.4 Fit the apparatus with the abrasive wheels (see 5.1.4) specified by the relevant material (or product) specification, carefully avoiding touching the cylindrical abrasive zone. Lower the arms and gently place the abrasive wheels on the test specimen. The abrasive power of the wheels