QC/T 818-2009Spoke wheels for motorcycles and mopeds (English PDF)

1 Scope

This Standard specifies the terms and definition, requirements, test methods, inspection rules, label, package, transportation, and storage of spoke-wheels of motorcycles and mopeds.

This Standard is applicable to the spoke-wheels of motorcycles and mopeds (hereinafter referred as wheel).

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.

GB/T 228 Metallic materials - Tensile testing at ambient temperature (GB/T 228-2002, ISO 6892:1998(E), EQV)

GB/T 1173 Casting aluminium alloys (GB/T 1173-1995, ASTM B26:1992, NEQ)

GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1. Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.1-2003, ISO 2859-1:1999, IDT)

GB/T 2933 Wheels/rims for pneumatic tyres - Nomenclature, designation and marking (GB/T 2933-1995, ISO/DIS 3911. 1993, EQV)

GB/T 20975.1~GB/T 20975.24 Methods for chemical analysis of aluminium and aluminium alloys

GB/T 7999 Optical emission spectrometric analysis method of aluminum and aluminum alloys

GB/T 9438 Aluminium alloy castings (GB/T 9438-1999, ASTM B26/B26M.1992, NEQ)

GB/T 13202 Series of motorcycle rims (GB/T 13202-2007, ISO 4249-3:2004, ISO 5995-2:1988, ISO 6054-2:1990, MOD)

GB/T 13822 Test specimens for non ferrous diecasting alloys

GB/T 15115 Die casting aluminum alloys

GB/T 22435-2008 Light-alloy wheels for motorcycles and mopeds

QC/T 725 Test method for calibrated diameter of motorcycles and mopeds rims using sphere-string ruler

QC/T 726 Test method for calibrated diameter of motorcycles and mopeds rims using even strap ruler

HG/T 2443 Test method of static loaded performance for tyres

3 Terms and definitions

The terms and definitions defined in GB/T 2933 AND the following terms and definitions apply to this Standard.

4 Requirements

4.7.2 Radial load fatigue performance. After test for more than 5 x 10^5 rotation in accordance with 5.7.2, wheel shall be free of damage crack, breakage, and the abnormal loosen of joint part. The radial and axial circle run-out of wheel after test shall not be greater than 2.0mm.

4.7.3 Torsion fatigue performance. After test with more than 1 x 10^5 rotation in accordance with 5.7.3, wheel shall be free of damage crack, breakage, and the abnormal loosen of joint part. The radial and axial circle run-out of wheel after test shall not be greater than 2.0mm.

4.7.4 Air tightness (only applicable to wheel without inner tire). CONDUCT test in accordance with 5.7.4. The pressure of tire and rim shall be kept for at least 30s and there shall have no air leakage.

5 Test methods

5.7.2.3 Test method. Tire shall be installed on the test machine in the same way as it is installed on the vehicle (refer to Figure 7). Tire is inflated in accordance with the method in 5.7.2.2 b). Then APPLY the radial load Q according to the calculated value of Formula (5); at the same time, DRIVE the drum to rotate and then conduct test. All the loads shall be on the connecting line between the center of wheel and the center of drum.

5.7.2.4 CHECK cracks after test is done. For the inspection of cracks, ADOPT visual inspection method, dye penetration method, penetration flaw detector, or X-ray fault detector to inspect cracks.

6 Inspection rules

6.1.2 Exit-factory inspection shall be conducted in accordance with the double sampling plan as specified in GB/T 2828.1. Acceptable quality level (AQL) is 4.0 and inspection level (IL) is Class I.

6.1.3 The test items of exit-factory inspection are.

b) General requirements on hub (except the tension to destroy hub spoke hole);

c) Tightening torque of spoke nut;

d) Assembly quality examined in accordance with Article 4.5;

e) Appearance quality; f) Air tightness. […]