QC/T 1111-2019Commercial vehicles - Light alloy wheels - 30° impact test method (English PDF)
商用车 轻合金车轮30°冲击试验方法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
November 11, 2019
Implementation date
April 1, 2020
Scope
QC/T 1111-2019 is the English-translated version of 商用车 轻合金车轮30°冲击试验方法.
QC/T 1111-2019 covers a laboratory test method for evaluating how light alloy wheels behave when they strike a curb axially, or transversely, and it applies to light alloy wheels for commercial vehicles.
It covers the test samples, the test equipment, the test procedure and the failure criteria. Samples are new wheels that have been through all production processes.
The tires are those specified by the vehicle manufacturer; where nothing is specified, tubeless tires with the smallest nominal section width to GB/T 2977 are used, and the inflation pressure is the manufacturer's value or else the pressure given in GB/T 2977, with an allowed error of plus or minus 10 kPa.
The drop height of the hammer comes from a formula built on the distance H from the impact surface to the highest point of the tire in mm, the wheel or wheel rated load W in kg specified by the vehicle manufacturer, and a coefficient K in mm/kg usually taken as 0.4 mm/kg.
In the procedure the wheel-tire assembly is mounted on a jig equivalent in size to the vehicle fixture, H is set, the lower edge of the auxiliary hammer is made to overlap the rim by 25 mm plus or minus 1 mm, the nuts or bolts are tightened to the manufacturer's torque, and the hammer is released.
A wheel has failed if the tire pressure within 30 s is less than 50 percent of the initial value, or if penetrating cracks are found with colored penetrant.
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Document preview — QC/T 1111-2019
National Standard of the People's Republic of China
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword7
- 1 Scope8
- 2 Normative references8
- 3 Terms and definitions8
- 4 Test samples8
- 5 Test equipment9
- 6 Test method9
- 7 Failure criteria10
1 Scope
This standard specifies a laboratory test method, for evaluating the performance of light alloy wheels impacting curbs axially (transversely).
This standard applies to light alloy wheels for commercial vehicles.
2 Normative references
The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.
GB/T 2933 Wheels and rims for pneumatic tyres - Vocabulary, designation and marking
GB/T 2977 Size designation, dimensions, inflation pressure and load capacity for truck tyres
3 Terms and definitions
The terms and definitions, as defined in GB/T 2933, as well as the following terms and definitions, apply to this document.
3.1 Wheel-tire assembly
Assembled assembly of wheels, tires, valves.
4 Test samples
New wheels that have been gone through all processes.
The tires selected for the test shall be the tires specified by the vehicle manufacturer. If there is no special requirement, it shall use the tubeless tires with the smallest nominal section width in accordance with GB/T 2977. The inflation pressure is the value, which is specified by the vehicle manufacturer. If there is no requirement, it shall comply with the provisions of GB/T 2977 on tire air pressure; the allowable error range is ±10 kPa.
6 Test method
6.2 Drop height of hammer
The drop height of the hammer is calculated by the following formula:
Where:
H - The distance from the impact surface to the highest point of the tire, mm;
W - Wheel or wheel rated load specified by the vehicle manufacturer, kg;
K - Coefficient, mm/kg, usually take K = 0.4 mm/kg.
6.3 Test procedure
6.3.1 Install the wheel and tire assembly on the testing machine. The testing machine mounting jig shall be equivalent, in size, to the fixture used on the vehicle.
6.3.2 Adjust the distance H, from the impact surface of the hammer to the highest point of the tire.
6.3.3 Adjust the position of the wheel tire assembly, so that the lower edge of the auxiliary hammer overlaps the wheel rim by 25 mm ± 1 mm (see Figure 1). Adjust the position in the circumferential direction of the wheel, so that the impact part is directly below the hammer.
6.3.4 Tighten the nuts or bolts to the torque, which is specified by the wheel or vehicle manufacturer.
6.3.5 Release the hammer for impact.
6.3.6 Raise the hammer, to check the tire air pressure and wheel cracks.
7 Failure criteria
A wheel is considered to have failed, if any of the following occurs:
a) The tire pressure within 30 s is less than 50% of the initial value;
b) Wheel penetrating cracks (check with colored penetrant).
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 23 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 2933-2025 — Vocabulary, designation and marking of wheels and rims for pneumatic tyres
GB/T 2977-2024 — Size designation, dimensions, inflation pressure and load capacity for truck tyres
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