QC/T 1092-2018 PDF in English
QC/T 1092-2018 (QC/T1092-2018, QCT 1092-2018, QCT1092-2018)
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Static stiffness test methods for 15-degree drop center commercial vehicle steel wheels
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Standards related to (historical): QC/T 1092-2018
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QC/T 1092-2018: PDF in English (QCT 1092-2018) QC/T 1092-2018
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
T 22
Static stiffness test methods for 15° drop center
commercial vehicle steel wheels
ISSUED ON: APRIL 30, 2018
IMPLEMENTED ON: SEPTEMBER 01, 2018
Issued by: Ministry of Industry and Information Technology of the
People's Republic of China
Table of Contents
Announcement ... 4
Foreword ... 7
1 Scope ... 8
2 Normative references ... 8
3 Terms and definitions ... 8
4 Test samples ... 9
5 Test devices ... 9
6 Test methods ... 10
7 Test determinations ... 10
Formulation explanation for QC/T 1092-2018 “Static stiffness test methods for
15° drop center commercial vehicle steel wheels” ... 12
1 Job profile ... 12
2 Standard preparation principle and main content ... 14
3 Analysis on main verification ... 15
4 Patent involvements in standard ... 19
5 Expected social benefits and effects on industrial development ... 19
6 Comparison and analysis of the project and international standards (foreign
advanced standards) as well as adoption ... 20
7 Position of this Standard in the wheel standard system and coordination with
current relevant standards, laws and regulations ... 20
8 Process and basis for major disagreements ... 20
9 Suggested description of the standard nature ... 21
10 Requirements for standard implementation and suggestions on measures
... 21
11 Proposal to abolish existing relevant standards ... 21
12 Other matters that shall be explained ... 21
Annex:
References, names and dates of implementation of 42 automotive
industry standards
No. Standard reference Standard name
Standard
reference being
substituted
Date of
implementation
(YY-MM-DD)
419 QC/T 243-2018
Flatness
requirements and test
methods of wheel
attachment face
QC/T 243-2004 2018-09-01
420 QC/T 1092-2018
Static stiffness test
methods for 15° drop
center commercial
vehicle steel wheels
2018-09-01
421 QC/T 932-2018
Emergency shutoff
valve of road tanker
for dangerous liquid
goods transportation
QC/T 932-2012 2018-09-01
422 QC/T 456-2018 Bulk vehicles for particle grain QC/T 456-1999 2018-09-01
423 QC/T 790-2018
Performance
requirements and
bench test methods
of brake chamber for
automotive vehicle
and trailer
QC/T 790-2007 2018-09-01
424 QC/T 1093-2018
Side impact tube
beam for passenger
car
2018-09-01
425 QC/T 696-2018
The centralized
lubrication system of
automotive chassis
QC/T 696-2011 2018-09-01
426 QC/T 695-2018 Automotive relay QC/T 695-2002 QC/T 419-1999 2018-09-01
Static stiffness test methods for 15° drop center
commercial vehicle steel wheels
1 Scope
1.1 This Standard specifies the terms and definitions, test samples, test devices,
test methods and test determination for static stiffness of commercial vehicle
steel wheels.
1.2 This Standard is applicable to 15° drop center steel wheels of commercial
vehicle.
2 Normative references
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.
GB/T 2933, Wheels and rims for pneumatic tyres - Vocabulary, designation
and marking
GB/T 31961, Rims for truck-bus
GB/T 2977, Size designation, dimensions, inflating pressure and load
capacity for truck tyres
GB/T 1796.4, Tyre valves - Part 4: Tubeless clamp-in valves
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
2933 as well as the followings apply.
3.1 wheel static stiffness
the ability of the rim, the flange and the bead seat of the wheel to withstand
deformation under static conditions after pressurization
3.2 wheel-tire assembly
6 Test methods
6.1 Installation of inflating valve
6.1.1 The model of inflating valve shall comply with GB/T 1796.4.
6.1.2 Mount the inflating valve on the test wheel. Tighten the inflating valve
according to the tightening torque specified in GB/T 1796.4.
6.2 Tire installation
6.2.1 Select the tire according to GB/T 2977. It shall be the tire that is specified
by the major machine manufacturer, that is matched with test wheel load.
6.2.2 Mount the tire on the test wheel.
6.2.3 Put the wheel-tire assembly into the safety guard.
6.2.4 Fill the right amount of air pressure into the tire so as to make the tire
bead area to completely fit with the wheel rim bead seat.
6.3 Water-filling of tire
6.3.1 Move the wheel-tire assembly outside the safety guard, near the water
source. Lay it on the ground. The inflating valve is facing up.
6.3.2 Remove the valve cores of 2 inflating valves. Connect 1 of the inflating
valves to the water pipe.
6.3.3 Fill the tire with water. When the inflating valve of the unconnected water
pipe overflows, remount the valve core of the inflating valve.
6.4 Tire inflation
6.4.1 Put the wheel-tire assembly into the safety guard.
6.4.2 Inflate the wheel-tire assembly. Use a pressure gauge to monitor the
inflating pressure. The boosting speed does not exceed 300kPa/min. When the
tire pressure reaches 2.4 times the matching tire pressure to the test wheel load
that is specified by the main machine manufacturer or that is regulated in GB/T
2977, stop inflating.
6.4.3 Monitor current air pressure for 3 min.
7 Test determinations
In case one of the following situations, it shall determine that this test wheel
Formulation explanation
for QC/T 1092-2018 “Static stiffness test methods for 15° drop
center commercial vehicle steel wheels”
1 Job profile
1.1 Task source
The preparation and revision plan of this Standard was proposed on the third
session of the fourth meeting of Subcommittee on Wheels of National Technical
Committee on Automobiles of Standardization Administration of China
(hereinafter referred to as the Subcommittee) (held in Tianjin), based on the
requirements for the “Twelfth Five-Year” automotive wheel industry standard
system. In accordance with “The plans for the third batch of automobile industry
standard projects issued by the Ministry of Industry and Information Technology
(MIIT)”, the project approval number is MIIT (2014) No. 628; the plan number
is 2014-1629T-QC; the project name is “Static stiffness requirements and test
methods for 15° drop center commercial vehicle steel wheels”; the plan drafting
organization is Shandong Xingmin Wheel Co., Ltd.
1.2 Main working process
In November 2009, on the fourth session of the fourth meeting of the Wheel
Subcommittee that was held in Wuhan, it was proposed that Xingmin Intelligent
Transportation Systems(Group)Co., Ltd. (the former Shandong Xingmin Wheel
Co., Ltd.) would be responsible for the project research of “Static stiffness
requirements and test methods for 15° drop center commercial vehicle steel
wheels”. In October 2011, on the standard review meeting held in Changsha, it
was formally confirmed that the standard would be jointly drafted by Xingmin
Intelligent Transportation Systems (Group) Co., Ltd. (the former Shandong
Xingmin Wheel Co., Ltd.), MEFRO Wheel China Co., Ltd. Plant Jining (the
former Jining Centurion Wheels Manufacturing Co., Ltd.) and Jining Junda
Machinery Manufacturing Co. Ltd. After the standard preparation task was
issued, Shandong Xingmin Wheel Co., Ltd. and the other two companies
established the standard preparation working group. The group completed the
first draft based on the research on relevant standards at home and abroad.
In April 2012, the group submitted the standard draft on the standard discussion
meeting held in Suizhou to discuss. The meeting proposed five amendments to
the main content and the format of the standard. It also required the group to
verify the test methods of the standard and the rationality of inflating pressure.
Plant Jining (the former Jining Centurion Wheels Manufacturing Co., Ltd.) and
China Automobile Association Wheel Quality Supervision and Inspection
Center Co., Ltd. The main drafters and their jobs were as follows:
Liang Zhishan: responsible for the comprehensive work of standard preparation;
Chen Yunqing: responsible for the collection, translation and market research
of domestic and international standards;
Song Zhijian: responsible for the verification of test methods and the
preparation of standard texts;
Jiang Er: responsible for the preparation of the standard text and preparation
instructions;
Zhao Ensheng: responsible for the verification of test data;
Xu Zailing: responsible for the preparation of the standard text and preparation
instructions.
2 Standard preparation principle and main content
2.1 Standard preparation principle
The preparation of this Standard strictly follows the regulations and
requirements of GB/T 1.1-2009 “Directives for standardization - Part 1:
Structure and drafting of standards”. The frame, structure and content of this
Standard meet the requirements.
During the preparation process of this Standard, it referred to the Association
of European Wheel Manufacturers EUWA ES3.22:2003 “Static stiffness of 15°
drop centre truck steel wheels”. It repeatedly demonstrated the test methods
for static stiffness of 15° drop centre truck steel wheels in the standard. It
proposed the test methods for static stiffness of 15° drop center steel wheels
that were suitable for commercial vehicles in China.
2.2 Main content
2.2.1 Applicable scope
This Standard specifies the test methods for static stiffness of commercial
vehicle steel wheels. It is applicable to 15° drop center commercial vehicle steel
wheels.
2.2.2 Test devices
The test device mainly consists of inflating device, pressure gauge, pipeline and
wheels are fitted with level-18 12R22.5 radial tires; the exit-factory pressure is
0.93MPa; overload is particularly serious for heavy truck; the actual pressure
used by user is maintained between 1.20MPa ~ 1.40MPa, nearly 1.5 times the
exit-factory pressure. 17.5×6.75 series wheels are fitted with 14-level 9R17.5
radial tires; the exit-factory pressure is 0.83MPa; overload is not particularly
serious for medium-sized vehicle; the actual pressure used by user is
maintained between 0.8MPa ~ 1.0MPa, slightly greater than the exit-factory
pressure. The exit-factory tire pressure is consistent with the rated pressure of
the tire specified in GB/T 2977.
Because the airflow during the puncture is large and unsafe, first fill a part of
the water in the tire so as to absorb energy. The first rounds of tests were carried
out in June 2012. The test process is as follows:
1) Sample preparation: Respectively extract three 22.5×9.00 wheels and
three 17.5×6.75 wheels that are produced by Xingmin Wheel and MEFRO
Wheel. Process 1 more inflating valve hole on the opposite side of the
original inflating valve hole. Process the rim and flange widths to the
minimum values required by the product. The assembled inflating valve
models are V3-20-6 and V3-20-4. The assembled tires are level-18
12R22.5 radial tires (rated pressure is 0.93MPa) and level-14 9R17.5
radial tires (rated pressure is 0.83MPa);
2) Installation of inflating valve and tire: Mount the inflating valve on the test
wheel and tighten. Then mount the tire on the wheel. Fill the right amount
of air pressure into the tire so as to make the tire bead area to completely
fit with the wheel rim bead seat;
3) Water-filling of tire: Lay the wheel-tire assembly on the ground. The
inflating valve is facing up. Remove the valve cores of 2 inflating valves.
Connect 1 of the inflating valves to the water pipe. Fill the tire with water.
When the inflating valve of the unconnected water pipe overflows,
remount the valve core of the inflating valve;
4) Inflation of wheel-tire assembly: Put the wheel-tire assembly into the
safety guard. Inflate the wheel-tire assembly. When the 22.5×9.00 wheel-
tire assembly is quickly inflated to 1.40MPa, remain the pressure for 3 min.
Remain the pressure for 3 min after each increase of 0.20MPa. Observe
whether the inflating air pressure drops until the puncture pressure drops
rapidly. When the 17.5×6.75 wheel-tire assembly is quickly inflated to
1.00MPa, remain the pressure for 3 min. Remain the pressure for 3 min
after each increase of 0.20MPa. Observe whether the inflating pressure
drops until the puncture or the air pressure drops rapidly. See Table 1 and
Table 2 for test results.
Process the rim and flange widths to the minimum values required by the
product. 22.5×9.00 wheels are fitted with level-18 11R22.5 radial tires. After the
22.5×9.00 wheel-tire assembly is quickly inflated to 1.8MPa, remain the
pressure for 3 min. Remain the pressure for 3 min for each increase of 0.10MPa.
Observe whether the inflating pressure drops. When the air pressure increases
to 2.40MPa, remain the pressure for 3 min. Suspend the test. After the air
pressures of 2 wheel-tire assemblies reach to 2.20MPa (2.36 times the rated
air pressure of the tire), remain the air pressure less than 3 min. Water in the
tire flashes. The flange is deformed. The tire falls off. After the air pressure of
other wheel-tire assembly reaches 2.40MPa, remain the air pressure for 3 min,
intact.
17.5×6.75 wheels are fitted with level-14 9R17.5 radial tires. After the 17.5×6.75
wheel-tire assembly is quickly inflated to 1.40MPa, remain the pressure for 3
min. Remain the pressure for 3 min for each increase of 0.10MPa. Observe
whether the inflating pressure drops. When the air pressure increases to
2.00MPa, remain the pressure for 3 min. Suspend the test. After the air pressure
of 2 wheel-tire assemblies reach to 2.00MPa (2.41 times the rated air pressure
of tire), remain the air pressure less than 3 min. Water in the tire flashes. The
flange is deformed. The tire falls off. After the air pressure of rest wheel-tire
assemblies reaches 2.00MPa, remain the air pressure for 3 min, intact.
Through three rounds of tests, the preparation group thought that when the tire
air pressure reaches 2.40 times the rated inflating pressure of the tire that
matches the wheel load, the tire falls off, and the wheel shall be determined as
rejected. The preparation group, based on the results of three rounds of tests,
finally set the test tire air pressure as 2.4 times the rated inflating pressure of
the tire that matches the wheel load.
4 Patent involvements in standard
This Standard does not involve with any patent and copyright issues.
5 Expected social benefits and effects on industrial
development
This Standard is mainly to test the ability of the wheel rim, flange and bead seat
to withstand deformation under static conditions after pressurization. The
purpose is to prevent the wheel from falling off due to deformation of the wheel
rim, flange and bead seat during normal driving, which shall result in a safety
accident.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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