GB/T 15704-2025 PDF English
US$275.00 · In stock · Download in 9 secondsGB/T 15704-2025: Road vehicles - Light alloy wheels - Impact test method Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB/T 15704: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 15704-2025 | English | 275 |
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Road vehicles - Light alloy wheels - Impact test method
| Valid |
| GB/T 15704-2012 | English | 70 |
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Road vehicles -- Light alloy wheels -- Impact test procedure
| Valid |
| GB/T 15704-1995 | English | 199 |
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2 days
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Passenger cars--Wheels--Impact test procedure
| Obsolete |
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GB/T 15704-2025: Road vehicles - Light alloy wheels - Impact test method---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT15704-2025
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 43.040.50
CCS T 22
GB/T 15704-2025 / ISO 7141.2022
Replacing GB/T 15704-2012
Road vehicles - Light alloy wheels - Impact test method
(ISO 7141.2022, Road vehicles - Light alloy wheels - Lateral impact test, IDT)
Issued on: JUNE 30, 2025
Implemented on: JANUARY 1, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Test equipment... 5
5 Calibration... 6
6 Test procedures... 6
7 Failure criteria... 7
Appendix A (Informative) Supplementary instructions for impact testing machine
calibration... 11
Road vehicles - Light alloy wheels - Impact test method
1 Scope
This document describes a laboratory test method for evaluating the axial (or lateral)
impact performance of wheels made wholly or partly of light alloy against curbs.
This document is applicable to passenger cars and special vehicles whose wheels may
hit the curb.
2 Normative references
The provisions of the following documents constitute the essential clauses of this
document through normative references in this text. Among them, for referenced
documents with dates, only the versions corresponding to the dates are applicable to
this document; for referenced documents without dates, the latest versions (including
all amendments) are applicable to this document.
ISO 3911 Wheels and rims for pneumatic tires - Vocabulary, designation and
marking
NOTE. GB/T 2933-2009 Wheels and rims for pneumatic tyres – Vocabulary, designation and
marking (ISO 3911.2004, IDT)
3 Terms and definitions
For this document, the terms and definitions defined in ISO 3911 and the following
apply.
4 Test equipment
4.1 Select representative new wheels that have undergone all the necessary processing
steps and assemble tires for the test. Tires and wheels used in this test should not be
reused on vehicles.
4.2 The impact load test machine uses a vertical action steel impact head with an impact
surface, see Figure 1.The deviation of the hammer mass (m) is ±2%, in kilograms (kg),
and shall be calculated according to formula (1).
Where
m -- the mass of the hammer, in kilograms (kg);
W -- the maximum vertical static load of the wheel specified by the wheel or vehicle
manufacturer, in kilograms (kg). If not specified, the maximum value of the
rated load of the wheel and tire shall be taken.
4.3 The calibration mass is 1000 kg.
5 Calibration
A calibration mass of 1000 kg is applied vertically to the mounting center of the wheel
through the calibration connector, as shown in Figure 2.When measured at the center
of the steel beam, the vertical deformation is within the range of 7.5 mm±0.75 mm.
The drop height of the hammer should be 230 mm±2 mm. This height shall be sufficient
to allow the hammer to travel a distance of 25.4 mm before contacting the tire, taking
12.31+0.3 0 ms.
The loss of hammer velocity due to friction in the test equipment is compensated by the
adjusted drop height (ADH) to achieve a measured velocity equivalent to that of a 230
mm free fall. Prior to impacting the tire, a velocimeter is used in conjunction with a
gate grating to measure the hammer velocity. Starting at a calibrated height of 230 mm,
the height is increased in 2 mm increments until the hammer passes the gate grating,
taking 12.31+0.3 0 ms. If the drop height increment exceeds 10 mm during calibration, the
tester should be removed from service, and maintenance shall be performed to reduce
friction in the system. For equipment that passes calibration, all tests shall be conducted
at the adjusted drop height until the next calibration.
Appendix A gives guidance and examples for measuring the time required to cover a
distance.
6 Test procedures
6.1 Install the test wheel and tire assembly on the testing machine so that the impact
load is applied to the wheel flange. The wheel axis shall be at an angle of 13°±1° to the
vertical, with the highest point of the wheel flange facing the impact hammer.
The tires used for the test shall be those specified by the vehicle manufacturer. If no tire
is specified, a tubeless radial tire with the minimum nominal section width applicable
to the wheel shall be used. The inflation pressure shall be the value specified by the
vehicle manufacturer. If no such value is specified, the inflation pressure shall be 200
kPa.
During the entire test process, the ambient temperature shall be maintained at
10 ℃~30 ℃.
6.2 Ensure that the wheel is assembled to the hub fixture using fasteners that are
consistent with the actual installation on the vehicle and have representative dimensions.
Tighten the nuts or bolts by hand to the specified torque value, or tighten them using
the method recommended by the vehicle or wheel manufacturer.
Due to the diversity of wheel center section designs, sufficient locations on the
circumference of the wheel flange are selected for impact testing to ensure the
completeness of the center section evaluation. A new wheel is used for each test.
7 Failure criteria
If any of the following conditions occur, the test wheel is considered to have failed.
a) It can be seen that the crack penetrates the cross-section of the center part of
the wheel, see Figure 3;
b) The center part of the wheel is separated from the rim;
c) Within 1 minute, all tire pressure leaks out.
If only the wheel is deformed or the section of the rim directly impacted by the hammer
is broken, the test wheel is not considered to have failed.
NOTE 1.A fracture or separation of the outer flange below the hammer, as shown in Figure 3 (at the
outer flange), does not constitute a failure to meet the acceptance criteria.
NOTE 2.Any changes to components other than the wheel body (such as pneumatic parts) shall not be
used as a basis for judging the test results.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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