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1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-2.6a:1983 Superseding BS AU 50-2.6:1983 Incorporating Amendment No. 1 Tyres and wheels Part 2: Wheels and rims Section 6a: Specification for road wheels manufactured wholly or partly of light alloy for mopeds and motor cycles UDC 629.113.012.3.012.61 Licen
2、sed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Boar
3、d of BSI and comes into effect on 28 February 1983 BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 81/79533 DC ISBN 0 580 13160 2 Amendments issued since publication Amd. No.Date of issueComments 8877December 1995 Indicated by
4、 a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 BSI 02-2000i Contents Page Forewordii 6.1Scope1 6.2Materials1 6.3Protection of magnesium alloy castings and finished
5、wheels1 6.4Rim profiles1 6.5Tests of completed wheels1 6.6Documentation2 6.7Marking2 Appendix A Torsional fatigue test3 Appendix B Radial fatigue test3 Appendix C Cornering fatigue test4 Appendix D Radial impact test5 Appendix E Leak test6 Figure 1 Typical arrangement for the torsional fatigue test3
6、 Figure 2 Typical arrangement for the radial fatigue test4 Figure 3 Typical arrangement for the cornering fatigue test4 Figure 4 Typical arrangement for the radial impact test6 Figure 5 Profile of striker for radial impact test6 Figure 6 Leak test machine7 Publications referred to8 Licensed Copy: Lo
7、ndon South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 ii BSI 02-2000 Foreword This Section of this standard was prepared under the direction of the Automobile Standards Committee. As far as practicable, the require
8、ments of the standard have been aligned with the work of ISO/TC 22, Road vehicles, SC 22, Motorcycles, and SC 23, Mopeds, on light alloy wheels for mopeds and motor cycles. The trend away from wire-spoked moped and motor cycle wheels to those manufactured from light alloy castings or fabricated from
9、 combinations of sheet materials and/or castings has led to some unusual designs. In some cases, spokes have become few in number and not tangentially inclined to the hub; large spans of unsupported rim have appeared; spokes have tended to become thin in relation to lateral forces; also it is relati
10、vely easy for inexperienced manufacturers to produce such wheels. For these reasons, this Section of the standard has been introduced to ensure that the quality is adequately controlled. Tyre, wheel, rim and valve requirements are given in the following Parts and Sections of BS AU 50: Part 1: Tyres;
11、 Section 0: General; Section 1: Car tyres; Section 2: Commercial vehicle tyres; Section 3: Off-the-road tyres; Section 4: Agricultural vehicle tyres; Section 5: Industrial vehicle tyres; Section 6: Motor cycle tyres; Section 7: Moped tyres; Section 8: Code of practice for the storage of tyres, inner
12、 tubes and flaps; Part 2: Wheels and rims; Section 0: General (including terms and definitions, and construction and workmanship); Section 1: Rim profiles and dimensions (including openings for valves); (withdrawn) Section 2: Specification for dimensions of wheel naves and hub centres for commercial
13、 vehicles; Section 3: Specification for road-wheel nuts, studs and bolts for commercial vehicles; Section 5: Road wheels manufactured wholly or partly of cast light alloy for passenger cars; Section 6: Specification for road wheels manufactured wholly or partly of light alloy for mopeds and motor cy
14、cles; Section 7: Code of practice for the selection and care of wheels for commercial vehicles; Section 8: Code of practice for the selection and care of wheels for passenger cars (including caravans and light trailers); Part 3: Valves; Section 1: Specification for valve dimensions; Section 2: Tyre
15、valve threads 5V1, 5V2, 6V1 and 8V1; Section 3: Tyre valve threads 9V1, 10V2, 12V1 and 13V1; Section 4: Tyre valve threads 8V2, 10V1, 11V1, 13V2, 15V1, 16V1, 17V1, 17V2, 17V3, 19V1 and 20V1; Section 5: Dimensions for ISO core chamber No. 1 for tyre inflation valves; Section 6: Dimensions for ISO cor
16、e chamber No. 2 for tyre inflation valves; Section 7: Code of practice for the selection and care of tyre inflation valves for passenger cars (including caravans light trailers); Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontroll
17、ed Copy, (c) BSI BS AU 50-2.6a:1983 BSI 02-2000iii Section 8: Code of practice for the selection and care of tyre inflation valves for commercial vehicles; Part 4: Rim profiles and dimensions; Section 1: Car rims; Section 2: Commercial vehicle rims; Section 3: Off-the-road rims; Section 4: Agricultu
18、ral tractor and machine rims; Section 5: Industrial vehicle rims; Section 6: Motor cycle rims; Section 7: Moped rims. Certification. Attention is drawn to the certification facilities described on the inside back cover of this standard. A British Standard does not purport to include all the necessar
19、y provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to
20、 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:5
21、2:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 BSI 02-20001 6.1 Scope This Section of the standard specifies performance requirements
22、 and methods of test for all wheels with any structural element manufactured of light alloy for use on all two-wheeled mopeds and motor cycles with or without sidecars attached, all three-wheeled mopeds and three-wheeled motor cycles having an unladen weight (see Road Traffic Act 1972: Section 194)
23、of not more than 255 kg. NOTE 1Requirements for light alloy wheels for use on three-wheeled motor cycles having an unladen weight greater than 255 kg are given in BS AU 50-2.5. This standard is not applicable to wheels with steel rims and tensioned steel wire spokes. NOTE 2The titles of the publicat
24、ions referred to in this standard are listed on page 8. 6.2 Materials Materials used for the manufacture of light alloy wheels shall comply with the material requirements of the current edition of BS AU 50-2.5. 6.3 Protection of magnesium alloy castings and finished wheels The protective treatment a
25、gainst corrosion shall be applied by the founder and/or the wheel manufacturer. All surfaces on magnesium alloy wheels shall be fully protected. 6.4 Rim profiles Rim profiles shall be selected from and shall comply with the current edition of BS AU 50-4.6.2 or BS AU 50-4.6.3, or BS AU 50-4.7.1; as a
26、ppropriate. 6.5 Tests of completed wheels 6.5.1 Design validation. To comply with this Section of this standard, the design shall be validated by test wheels which shall demonstrate compliance with 6.5.3. Any change in detail design or material specification shall be followed by revalidation. Revali
27、dation shall follow any change in the finishing system which could result in changes in the residual surface stress condition. 6.5.2 Preparation of test wheels. Tests shall be carried out on fully-finished wheels representative of normal production except in those cases where permanent protective co
28、atings have been applied which cannot be removed by simple chemical processes without damage to the wheels, this coating removal being necessary to permit penetrant-dye crack detection to be carried out. In these exceptional cases it shall be permissible to test uncoated wheels, provided that the wh
29、eels have undergone the complete heat-stoving cycle applicable to the coating process. 6.5.3 Performance requirements 6.5.3.1 General. All wheels manufactured in accordance with this standard shall comply with 6.5.3.2 to 6.5.3.7. 6.5.3.2 Torsional fatigue test (separate wheel). Wheels shall be subje
30、cted to the torsional fatigue test described in Appendix A, and shall comply with the criteria of acceptance specified in A.6. 6.5.3.3 Radial fatigue test (separate wheel). Wheels shall be subjected to the radial fatigue test described in Appendix B, and shall comply with the criteria of acceptance
31、specified in B.6. 6.5.3.4 Cornering fatigue test (separate wheel). Wheels shall be subjected to the cornering fatigue test described in Appendix C, and shall comply with the criteria of acceptance specified in C.6. 6.5.3.5 Radial impact test. Wheels shall be subjected to the radial impact test descr
32、ibed in Appendix D, and shall comply with the criteria of acceptance specified in D.6. 6.5.3.6 Leak test. Wheels intended for use with tubeless tyres and marked accordingly (see 6.7) shall be subjected to the leak test described in Appendix E, and shall comply with the criterion of acceptance specif
33、ied in E.4. 6.5.3.7 Finishing systems. The rim area covered by the tyre, whether polished or not, and any other unpolished areas, shall be protected such as to comply with the requirements for finishing systems specified in the current edition of BS AU 50-2.5. It shall be the responsibility of the w
34、heel manufacturer and the retailer to include with the sale of polished wheels or a vehicle fitted with polished wheels a warning of the effects of corrosion on polished areas, and to make recommendations regarding protection. SAFETY NOTE. It is essential that all tyres and wheels used for test purp
35、oses (see 6.5.3.2 to 6.5.3.7) are not fitted to vehicles. However, they may be used for further laboratory tests. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 2 BSI 02-2000 6.6 Documentati
36、on Chemical analysis certificates and/or hot metal suppliers analysis certificates, chemical analysis records, mechanical test records, heat treatment furnace charts, dimensional records and records of compliance with the performance requirements specified in 6.5.3 appertaining to all wheels shall b
37、e retained for a minimum period of 6 years. 6.7 Marking Wheels complying with the requirements of this Section of this standard shall be legibly and permanently marked as follows: a) the number of this British Standard, i.e. BS AU 50:2.61) and the country of origin; b) the trademark or other means o
38、f identification of the manufacturer; c) the size of the wheel; d) the maximum static wheel load (in kg); e) an indication that the wheel is suitable for use with tubeless tyres, if applicable, e.g. “tubeless”; f) the vehicle or wheel manufacturers part number; g) an indication of the date of produc
39、tion of the wheel. The markings in a) to e) shall be visible when the wheel is fitted with a tyre. 1) Marking BS AU 50:2.6 on or in relation to a product is a claim by the manufacturer that the product has been manufactured in accordance with the requirements of the standard. The accuracy of such a
40、claim is therefore solely the manufacturers responsibility. Enquiries as to the availability of third party certification to support such claims should be addressed to the Director, Quality Assurance Division, BSI, Maylands Avenue, Hemel Hempstead, Herts HP2 4SQ in the case of certification marks ad
41、ministered by BSI or to the appropriate authority for other certification marks. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 BSI 02-20003 Appendix A Torsional fatigue test A.1 Test equipm
42、ent The test machine shall be one with a means to impart an alternating torsional loading to a hub about the axis of the wheel and in relation to the rim. A suitable form of machine is shown in Figure 1. A.2 Procedure Securely clamp the wheel by a rim flange or both flanges to a supporting face, and
43、 apply torsional loading through a torque arm or two torque arms attached to the hub by a means representative of that used to attach the braking members or drive members to the hub on the vehicle. Assemble any bolts or fastenings through the hub and tighten them at the beginning of the test using t
44、he procedure specified by the vehicle and/or wheel manufacturer. Ensure that the mating surfaces are free of excessive build-up of paint, dirt, or foreign matter. Apply the tangential force acting on the torque arm at a radius equal to the static laden radius of the largest recommended tyre for the
45、rim and on an axis coinciding with the centre-line of the rim. A.3 Test torque determination The test torque shall be determined as follows: T = F Kt R 9.81 where A.4 Torsional test duration The duration of test shall be 100 000 cycles with T applied. A.5 Accuracy of applied torque The applied torqu
46、e, as determined by a suitable means of calibration shall be accurate to within 5 % of its nominal value throughout each test cycle. A.6 Criteria of acceptance At completion of the test, there shall be no evidence of fatigue cracks (as indicated by a penetrant-dye test) deformation or failure (inclu
47、ding looseness) of mechanical fastenings. Appendix B Radial fatigue test B.1 Test equipment The test machine shall be one with a means to impart a constant radial force which rotates with respect to the wheel. A suitable form of machine is shown in Figure 2, in which the wheel equipped with a tyre i
48、s loaded radially against a rotating drum. The drum should be as large as practicable, the minimum diameter shall be 1.708 m. Figure 1 Typical arrangement for the torsional fatigue test Tis the test torque (in Nm); Fis the maximum static wheel loading (in kg), see 6.7 d), Ktis a test factor taken as
49、 1.0; Ris the static rolling radius (in m) of the largest diameter tyre specified for the rim in BS AU 50-1.6. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 01:52:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-2.6a:1983 4 BSI 02-2000 B.2 Procedure Use the size of tyre for the test wheel as specified in the appropriate Subsection of BS AU 50-1.6 or BS AU 50-1.7 for the particular rim size under test or as recommended by the vehi