1、BRITISH STANDARDBS ISO 7141:2005Road vehicles Light alloy wheels Impact testICS 43.040.50g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS ISO 7141
2、:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 August 2005 BSI 26 August 2005ISBN 0 580 46270 6National forewordThis British Standard reproduces verbatim ISO 7141:2005 and implements it as the UK national standard.The UK participatio
3、n in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international
4、 publications referred to in this document may be found in the BSI Catalogue under 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 th
5、e necessary provisions of a contract. Users are responsible for its correct application. 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 th
6、e interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, The BSI copyright notice displayed in thi
7、s document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date Commentspages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover.Reference numberISO 7141:2005(E)INTERNATIONAL STANDARD ISO7141Third edition2005-07-01Road vehicles Light
8、 alloy wheels Impact test Vhicules routiers Roues en alliage lger Essai de choc BS ISO 7141:2005ii 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 normall
9、y 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 take part in the
10、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 committees is to prepare In
11、ternational 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 possibility that some of
12、 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 7141 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 19, Wheels. This third edition cancels and replaces the second e
13、dition (ISO 7141:1995), the title and scope of which have been modified to include all road applications (not just passenger car applications) for light alloy wheels. BS ISO 7141:2005blank1Road vehicles Light alloy wheels Impact test 1 Scope This International Standard specifies a laboratory test pr
14、ocedure to evaluate the axial (lateral) kerb impact collision properties of a wheel manufactured either wholly or partly of light alloys. It is intended for passenger car applications, and special vehicle applications where the wheel may impact the kerb, with the purpose of screening and/or quality
15、control of the wheel. The vocabulary used is in accordance with ISO 3911. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenc
16、ed document (including any amendments) applies. ISO 3911, Wheels and rims for pneumatic tyres Vocabulary, designation and marking 3 Test equipment 3.1 New wheels, fully processed, representative of wheels intended for vehicle application, fitted with a tyre. Tyres and wheels used in the tests should
17、 not be used subsequently on a vehicle. 3.2 Impact loading test machine with a vertically acting steel striker having an impacting face at least 125 mm wide and at least 375 mm long and sharp edges broken by radius or chamfer, in accordance with Figure 1. The striker mass, m, within a tolerance of 2
18、 %, expressed in kilograms, shall be as follows: 0,6 180mW=+ where W is the maximum static wheel loading, as specified by the wheel and/or vehicle manufacturer, expressed in kilograms. 3.3 Mass of 1 000 kg. 4 Calibration Ensure, by means of a test calibration adapter, that the 1 000 kg mass (3.3) ap
19、plied vertically to the centre of the wheel fixing as shown in Figure 2 causes a deflection of 7,5 mm 0,75 mm when measured at the centre of the beam. BS ISO 7141:20052 5 Test procedure 5.1 Mount the test wheel (3.1) and tyre in the test machine (3.2) such that the impact loading is applied to the r
20、im flange of the wheel. The wheel shall be mounted with its axis at an angle of 13 1 to the vertical with its highest point presented to the striker. The tyre mounted on the test wheel shall be specified by the vehicle manufacturer. If no tyre is specified, the tyre shall be the smallest nominal sec
21、tion width tubeless radial-ply tyre intended for use on that wheel. The inflation pressure shall be that specified by the vehicle manufacturer or, in the absence of such specification, it shall be 200 kPa. The temperature of the test environment shall remain within the range 10 C to 30 C throughout
22、the test period. 5.2 Ensure that the wheel is mounted on the hub fixture with dimensionally representative fixings such as would be used on a vehicle. Manually tighten the fixings to a value or by a method recommended by the vehicle or wheel manufacturer. Because the design of wheel centre members c
23、an vary, test a sufficient number of locations on the wheel rim circumference to ensure that the integrity of the centre members is assessed. Use new wheels each time. 5.3 Ensure that the striker is over the tyre, and overlaps the rim flange by 25 mm 1 mm. Raise the striker to a height of 230 mm 2 m
24、m above the highest part of the rim flange and allow it to fall. 6 Failure criteria The wheel is considered to have failed the test if any of the following apply: a) visible fracture(s) penetrate through a section of the centre member of the wheel assembly; b) the centre member separates from the ri
25、m; c) the tyre loses all air pressure within 1 min. The wheel is not considered to have failed the test by deformation of the wheel assembly or by fractures in the area of the rim section struck by the face plate of the striker. BS ISO 7141:20053Dimensions in millimetres Key 1 steel striker aSharp e
26、dge broken by radius or chamfer. Figure 1 Impact loading test machine BS ISO 7141:20054 Dimensions in millimetres Key 1 steel beam, 200 25 2 1 000 kg calibration load 3 calibration adapter 4 wheel hub adapter 5 4 natural rubber mounts (or equivalent): hardness, 50 Shore; diameter, 51; uncompressed h
27、eight, 27 aAdjust for 13. b13 before calibration. cVertical deflection measured from base. Figure 2 Application of loading to centre of wheel mount BS ISO 7141:2005blankBS ISO 7141:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsi
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