1、BRITISH STANDARD BS ISO 7141:2005 Road vehicles Light alloy wheels Impact test ICS 43.040.50 BS ISO 7141:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 26 August 2005 BSI 26 August 2005 ISBN 0 580 46270 6 National foreword This British
2、Standard reproduces verbatim ISO 7141:2005 and implements it as the UK national standard. The UK participation 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 ca
3、n 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 the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of
4、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 application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid e
5、nquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This docu
6、ment comprises a front cover, an inside front cover, the ISO title page, The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments pages ii and iii, a blank page, pages 1 to 4, an inside back cover and
7、a back cover. Reference number ISO 7141:2005(E)INTERNATIONAL STANDARD ISO 7141 Third edition 2005-07-01 Road vehicles Light alloy wheels Impact test Vhicules routiers Roues en alliage lger Essai de choc BS ISO 7141:2005ii iii Foreword ISO (the International Organization for Standardization) is a wor
8、ldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards 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
9、 that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted
10、in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees 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 Standar
11、d 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 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 Te
12、chnical Committee ISO/TC 22, Road vehicles, Subcommittee SC 19, Wheels. This third edition cancels and replaces the second edition (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 71
13、41:2005blank1 Road vehicles Light alloy wheels Impact test 1 Scope This International Standard specifies a laboratory test procedure 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 appl
14、ications, and special vehicle applications where the wheel may impact the kerb, with the purpose of screening and/or quality 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 th
15、is document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced 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 proces
16、sed, representative of wheels intended for vehicle application, fitted with a tyre. Tyres and wheels used in the tests should 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 m
17、m long and sharp edges broken by radius or chamfer, in accordance with Figure 1. The striker mass, m, within a tolerance of 2 %, expressed in kilograms, shall be as follows: 0,6 180 mW =+ where W is the maximum static wheel loading, as specified by the wheel and/or vehicle manufacturer, expressed in
18、 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) applied 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 Te
19、st 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 rim 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
20、 test wheel shall be specified by the vehicle manufacturer. If no tyre is specified, the tyre shall be the smallest nominal section 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 spe
21、cification, it shall be 200 kPa. The temperature of the test environment shall remain within the range 10 C to 30 C throughout 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 f
22、ixings to a value or by a method recommended by the vehicle or wheel manufacturer. Because the design of wheel centre members can 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 E
23、nsure 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 mm 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
24、 fracture(s) penetrate through a section of the centre member of the wheel assembly; b) the centre member separates from the rim; 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 t
25、he rim section struck by the face plate of the striker. BS ISO 7141:20053 Dimensions in millimetres Key 1 steel striker aSharp edge 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 cal
26、ibration adapter 4 wheel hub adapter 5 4 natural rubber mounts (or equivalent): hardness, 50 Shore; diameter, 51; uncompressed height, 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
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