1、BS ISO13988:2008ICS 43.040.50NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPassenger vehiclewheels Clip balanceweight and rimflange nomenclature,test proceduresand performancerequirementsThis British Standardwas published under theauthority of the StandardsPol
2、icy and StrategyCommittee on 31 August2008 BSI 2008ISBN 978 0 580 56985 2Amendments/corrigenda issued since publicationDate CommentsBS ISO 13988:2008National forewordThis British Standard is the UK implementation of ISO 13988:2008.The UK participation in its preparation was entrusted to TechnicalCom
3、mittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with
4、 a British Standard cannot confer immunityfrom legal obligations.BS ISO 13988:2008Reference numberISO 13988:2008(E)ISO 2008INTERNATIONAL STANDARD ISO13988First edition2008-08-01Passenger vehicle wheels Clip balance weight and rim flange nomenclature, test procedures and performance requirements Roue
5、s pour vhicules particuliers Nomenclature des masselottes dquilibrage clippes et des rebords de jantes, mthodes dessai et exigences de performance BS ISO 13988:2008ISO 13988:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may
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8、 file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be re
9、produced 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 Case postale 56 CH-1211 Geneva 20 Tel. + 41 2
10、2 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedBS ISO 13988:2008ISO 13988:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative reference . 1 3 Terms and definitions.
11、 1 4 Rim flange types . 7 5 Test procedure 7 5.1 Preparation of balance weights for test . 7 5.2 Preparation of the wheel 7 5.3 Installation of balance weight 8 5.4 Tangential test. 8 5.5 Axial removal test . 10 BS ISO 13988:2008ISO 13988:2008(E) iv ISO 2008 All rights reservedForeword ISO (the Inte
12、rnational 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 ISO technical committees. Each member body interested in a subject for which a technical committee has
13、 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 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical s
14、tandardization. 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. Draft International Standards adopted by the technical committees are circulated to the member bodies
15、 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or
16、 all such patent rights. ISO 13988 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 19, Wheels. BS ISO 13988:2008ISO 13988:2008(E) ISO 2008 All rights reserved vIntroduction This International Standard addresses clip balance weights used on passenger car wheels. It provi
17、des general features and configurations of the clip balance weights and rim dimensions and defines terms used to describe these features. This International Standard provides test procedures to evaluate weight retention on the wheel. BS ISO 13988:2008BS ISO 13988:2008INTERNATIONAL STANDARD ISO 13988
18、:2008(E) ISO 2008 All rights reserved 1Passenger vehicle wheels Clip balance weight and rim flange nomenclature, test procedures and performance requirements 1 Scope This International Standard specifies procedures and minimum performance requirements for testing without tyres the retention of clip
19、balance weights for use on wheels for passenger vehicles. It also specifies general features for configurations of clip balance weights and rim flanges for light alloy and steel wheels intended for use on passenger cars. Alternative materials and geometries can be considered in the future. 2 Normati
20、ve reference 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 referenced document (including any amendments) applies. ISO 3911, Wheels and rims for pneuma
21、tic tyres Vocabulary, designation and marking ISO 4000-1, Passenger car tyres and rims Part 1: Tyres (metric series) ISO 4000-2, Passenger car tyres and rims Part 2: Rims ISO 4223-1, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres 3 Terms and definitions For the purposes
22、of this document, the definitions given in ISO 4223-1, ISO 4000-1, ISO 4000-2, ISO 3911 and the following apply. 3.1 balance weight assembly assembly of the weight and the clip, which is intended for mounting on the rim flange to balance the tyre/wheel assembly about its axis of rotation and thus mi
23、nimize vibrations due to the rotation of the tyre/wheel assembly NOTE Figure 1 gives the terminology and nomenclature of balance weight assembly. 3.1.1 weight material of a specified mass with contours to conform to the surface of the rim flange 3.1.2 clip specially formed metal affixed to the weigh
24、t to mount the balance weight on the rim flange 3.1.3 spur optional part of a clip that protrudes from its surface interfacing with the rim flange BS ISO 13988:2008ISO 13988:2008(E) 2 ISO 2008 All rights reserved3.1.4 balance weight coating non-corrosive material coating to avoid corrosion EXAMPLE P
25、olyester, nylon. 3.1.5 balance weight key dimensions dimensions that are essential for fitting the balance weight on the rim flange 3.1.6 balance weight size size determined by the magnitude of the balance weight mass, expressed in grams 3.1.7 balance weight retention force static force required to
26、remove the balance weight from the rim flange, expressed in newtons 3.1.8 balance weight retention ability of the balance weight to maintain its secure position on the rim flange in various service conditions 3.1.9 interference measure of balance weight press fit computed as the difference between t
27、he flange thickness and the weight gap 3.2 rim flange part of the rim where the balance weight is mounted NOTE 1 Figure 2 gives the terminology and nomenclature of rim flange features for light alloy wheels. NOTE 2 Figure 3 gives the terminology and nomenclature of rim flange features for wheels wit
28、h roll formed rim. NOTE 3 Figure 4 gives the terminology and nomenclature of rim flange features for fullface wheels. NOTE 4 Figure 5 gives the terminology and nomenclature of rim flange features for clad wheels. 3.2.1 rim flange key dimensions dimensions that are essential for fitting the balance w
29、eight on the rim flange BS ISO 13988:2008ISO 13988:2008(E) ISO 2008 All rights reserved 3CLIP DEPTH OUTER SURFACE OF CLIP COMPOUND RADIUS R1 for fullface and clad wheels: weight lead in and optional groove location. All measured dimensions shall be within design specifications. BS ISO 13988:2008ISO
30、13988:2008(E) 8 ISO 2008 All rights reserved5.3 Installation of balance weight Improper striking may cause drop-out of the balance weight. Follow the proper procedure as described below. The operator shall do the striking work right in front of the striking position. Strike the balance weight in suc
31、h a manner that the striking force is applied parallel with the wheel rim configuration and a maximum of three strikes properly seats it on the rim flange. Care shall be taken that a gap of about 1 mm is left between the balance weight and the wheel for secure bite of the balance weight (see Figure
32、6). Figure 6 Balance weight installation 5.4 Tangential test 5.4.1 General The test shall consist of measuring the minimum tangential force required to initiate the movement (see Figure 7). BS ISO 13988:2008ISO 13988:2008(E) ISO 2008 All rights reserved 9CLIPWEIGHT RIM FLANGE TANGENTIAL FORCE 0 TO 1
33、5 FROM THE RIM FLANGE Figure 7 Tangential force test 5.4.2 Test equipment The test equipment shall be capable of removing the balance weight from the rim flange, as well as measuring and reading the minimum tangential force required (0 to 15 angle from the rim flange) to initiate the movement. Calib
34、rate the load cell using increments of 25 N up to 200 N. 5.4.3 Test sequence 5.4.3.1 Install the balance weight on the inboard and outboard rim flange by using a non-metallic hammer, as described in 5.3. 5.4.3.2 Set the force indicator (dynamometer) on the test equipment to zero. 5.4.3.3 Gradually i
35、ncrease the tangential force and record the maximum indicated force. 5.4.3.4 Discard the balance weight removed from the rim flange and do not use it in future testing. 5.4.3.5 Reset the wheel for the next position of balance weight removal. 5.4.3.6 Repeat steps 5.4.3.1 to 5.4.3.5 for each balance w
36、eight installed on the inboard and outboard rim flange, following the sequential order of balance weight numbers. 5.4.4 Performance requirements tangential force The minimum value of balance weight retention force determined in accordance with the static test procedure described in 5.4 is shown in T
37、able 1. The minimum values shown in Table 1 only apply to weight installed on wheels without a tyre mounted. Additional testing with a tyre mounted to the wheel may be desirable to evaluate vehicle performance. NOTE The size and inflation pressure of the tyre can increase or decrease the final force
38、. Table 1 Tangential test- force values Mass, g 5 W 10 Force, N 60 100 BS ISO 13988:2008ISO 13988:2008(E) 10 ISO 2008 All rights reserved5.5 Axial removal test 5.5.1 Test equipment The test equipment shall be capable of removing the balance weight from the rim flange, as well as measuring and readin
39、g the minimum force required to initiate movement. Calibrate the load cell using increments of 10 N up to 500 N. 5.5.2 Test sequence 5.5.2.1 There are two distinct methods for evaluating axial weight retention: option 1: push off test (see Figure 8, which illustrates a possible apparatus); option 2:
40、 pull off test (see Figure 9). Figure 8 Push off balance weight test BS ISO 13988:2008ISO 13988:2008(E) ISO 2008 All rights reserved 11alternative Figure 9 Pull off balance weight test 5.5.2.2 The test shall be conducted in accordance with the sequence described in 5.5.2.3 to 5.5.2.11. 5.5.2.3 For o
41、ption 1, install the probe for moving the balance weight on the rim flange in the centre hole of the fixture with the flat edge facing up. 5.5.2.4 Install the balance weight on the inboard and outboard rim flange by using a non-metallic hammer, as described in 5.3. For option 2, install weight with
42、wire loop under the weight clip; alternatively, for balance weight with a hole in the clip, set the hook of the force indicator in the clip hole (see Figure 9). 5.5.2.5 Install the wheel in the test fixture and centre it in the base of the fixture. 5.5.2.6 For option 1, set the probe in the centre o
43、f the hole or notch located in the clip by adjusting its horizontal, vertical and angular positions, while avoiding contact with the rim flange during test sequence. For option 2, connect the wire loop (alternatively, the hook, avoiding contact with the rim flange) to the force indicator. 5.5.2.7 Se
44、t the force indicator on the test equipment to zero. 5.5.2.8 Gradually increase the force on the lever until the balance weight moves. Record the maximum indicated force. 5.5.2.9 Discard the balance weight removed from the rim flange and do not use it in future testing. 5.5.2.10 Reset the wheel for
45、the next position of the balance weight removal. 5.5.2.11 Repeat steps 5.5.2.3 to 5.5.2.10 for each balance weight installed on the inboard and outboard rim flange, following the sequential order of balance weight numbers. +/- 15 +/- 15 BS ISO 13988:2008ISO 13988:2008(E) 12 ISO 2008 All rights reser
46、ved5.5.3 Performance requirement axial force The minimum value of balance weight retention force determined in accordance with the static test procedure described in 5.5 is shown in Table 2. The minimum values shown in Table 2 only apply to weight installed on wheels without a tyre mounted. Addition
47、al testing with a tyre mounted to the wheel may be desirable to evaluate vehicle performance. NOTE The size and inflation pressure of the tyre can increase or decrease the final force. Table 2 Axial removal test force values Mass, g 5 10-15 20,25,30,35 40-80 W 90 Force, N 50 100 150 200 300 BS ISO 1
48、3988:2008This page has been intentionally left blank BS ISO13988:2008BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by am
