QC/T 243-2018 English PDF (QCT243-2018)

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QC/T 243-2018: Flatness requirements and test methods of wheel attachment face
QC/T 243-2018
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
T 22
Replacing QC/T 243-2004
Flatness requirements and test methods of wheel
attachment face
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 ... 9 
2 Normative references ... 9 
3 Terms and definitions ... 9 
4 Requirements ... 9 
5 Sample ... 10 
6 Test methods ... 10 
7 Determination of acceptance ... 14 
Formulation explanation for QC/T 243-2018 “Flatness requirements and test
methods of wheel attachment face” ... 15 
1 Job profile ... 15 
2 Standard revision principles ... 17 
3 Main revision contents ... 18 
4 Analysis on main test situation ... 19 
5 Expected social benefits and effects on industrial development ... 19 
6 Adoption of international standards and advanced foreign standards... 20 
7 Explanation on wheel standard system ... 20 
8 Process and basis for major disagreements ... 20 
9 Suggested description of the standard nature ... 20 
10 Requirements for standard implementation and suggestions on measures
... 20 
11 Proposal to abolish existing relevant standards ... 21 
12 Other matters that shall be explained ... 21 
Announcement
of Ministry of Industry and Information Technology of the
People's Republic of China
No. 23, 2018
It is hereby announced that the Ministry of Industry and Information Technology
approved 594 industry standards (see the annex for standard references,
names, main content and dates of implementation) such as "Medical film
printer", including 33 chemical industry standards, 10 petrochemical industry
standards, 11 metallurgical industry standards, 69 non-ferrous metal industry
standards, 47 building materials industry standards, 1 gold industry standard,
247 mechanical industry standards, 8 automotive industry standards, 1 aviation
industry standard, 7 ship industry standards, 66 light industry standards, 48
textile industry standards, 4 packaging industry standards, 6 civil explosive
industry standards, 24 electronic industry standards, 12 communication
industry standards. It approved 63 Industry measurement technical
specifications such as “Calibration specification for pump comprehensive
performance test bench”, including 19 mechanical engineering technical
specifications, 6 petrochemical industry measurement technical specifications,
9 textile industry measurement technical specifications, 13 communication
technology measurement technical specifications, and 16 electronic industry
measurement technical specifications.
The above chemical industry product standards are published by Chemical
Industry Press. The chemical industry engineering construction, automotive
industry standards are published by the Science and Technology Literature
Publishing House. The petrochemical industry standards are published by
Sinopec Publishing House. The metallurgical and non-ferrous metal industry
standards are published by the Metallurgical Industry Press. The gold, textile
and packaging industry standards are published by China Standard Press. The
building materials industry standards are published by Building Materials
Industry Press. The mechanical industry standards are published by the
Machinery Industry Press. The light industry standards are published by China
Light Industry Press. The aviation industry standards are published by China
Aviation Integrated Technology Research Institute. The ship industry standards
are published by China Shipbuilding Industry Comprehensive Technology
Research Institute. The civil explosion industry standards are published by the
China Ordnance Industry Standardization Institute. The electronic industry
standards are published by the China Electronics Standardization Institute. The
communication industry standards are published by the People's Posts and
Telecommunications Press.
The above technical specifications for machinery industry are published by the
Machinery Industry Press. The technical specifications for petrochemical and
textile industries are published by China Quality Inspection Press. The
communication Industry metrology technical specifications are published by
China Institute of Information and Communications. The electronic industry
metrology technical specifications are published by China Electronics
Technology Standardization Institute.
Annex: References, names and dates of implementation of 8 automotive
industry standards.
Ministry of Industry and Information Technology of the People's Republic of
China
April 30, 2018
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
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009
“Directives for standardization - Part 1: Structure and drafting of standards”.
This Standard replaces QC/T 243-2004 “Performance requirements and test
methods of automobile wheels disc base planeness”.
Compared with QC/T 243-2004, the main technical changes in this Standard
are as follows:
- modified the standard name to: “Flatness requirements and test methods
of wheel attachment face”;
- added normative references (see Clause 2);
- added terms and definitions (see Clause 3);
- added flatness requirements for light alloy wheel attachment face of
commercial vehicle: ≤0.20 mm (see Clause 4);
- modified flatness requirements for outer attachment face of commercial
vehicle steel wheel: the original one was ≤0.50 mm; now it is unified as:
the flatness requirements of inner, outer attachment faces are ≤0.40 mm
(see Clause 4 of this Edition, Clause 2 of QC/T 243-2004);
- modified measuring area requirements for attachment face of commercial
vehicle wheel (see Clause 4 of this Edition, Annex A of QC/T 243-2004);
- modified flatness requirements for attachment face of passenger vehicle
steel wheel: the original one was ≤0.20 mm; now it is ≤0.15 mm (see
Clause 4 of this Edition, Clause 2 of QC/T 243-2004);
- deleted Annex A (Annex A of QC/T 243-2004).
This Standard also made the following editorial modification to test methods:
- divided the test method in QC/T 243-2004 into gap method and indicator
method; described measuring steps in detail.
This Standard does not involve patents.
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Automobiles of Standardization Administration of
China (SAC/TC 114).
The drafting organizations of this Standard: Shanghai Baosteel Wheel Co., Ltd.,
Jiangsu Daya Wheel Manufacturing Co., Ltd., Jiaxing Fengpai Wheel Co., Ltd.,
Zhejiang Ouxing Huanmei Parts Co., Ltd.
Main drafters of this Standard: Xiang Bingzhi, Cai Jianzhong, Hao Shengfei, Li
Wenjian, Jiang Yindi, Xiong Hongbing, Li Dong.
Versions of standard substituted by this Standard are:
- QC/T 243-2004;
- QC/T 243-1997.
Flatness requirements and test methods
of wheel attachment face
1 Scope
1.1 This Standard specifies flatness requirements and test methods of wheel
attachment face.
1.2 This Standard is applicable to automobile wheel.
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/rims for pneumatic tyres - Nomenclature, designation
and marking
3 Terms and definitions
For the purposes of this document, the terms and definitions defined in GB/T
2933 apply.
4 Requirements
4.1 Flatness requirements for attachment face of commercial vehicle
wheel
See Table 1 for flatness requirements of commercial vehicle wheel attachment
face. See Table 2 for measuring area requirements of attachment face.
Table 1 -- Flatness requirements of commercial vehicle wheel
attachment face
mm
Material Flatness requirements
Steel ≤0.40
Light alloy ≤0.20
Table 2 -- Measuring area requirements of commercial vehicle wheel
attachment face
mm
4.2 Flatness requirements for attachment face of passenger vehicle wheel
See Table 3 for flatness requirements for attachment face of passenger vehicle
wheel.
Table 3 -- Flatness requirements for attachment face of passenger
vehicle wheel
mm
Material Flatness requirements
Steel ≤0.15
Light alloy ≤0.10 (center concave)
5 Sample
The sample to be tested shall be a new wheel that has completed all machining
processes, that is not tested and used.
6 Test methods
6.1 Gap method I
6.1.1 Measuring gauge for testing
The measuring gauge consists of flat plate (circular or cross-shaped) and feeler
gauge. The flat plate shall be able to cover measuring area. Its flatness shall be
Number of bolt holes
Diameter of bolt hole
distribution circle
Minimum diameter of
measuring area (inner)
Minimum diameter of
measuring area (outer)
less than or equal to 0.02 mm. The flat plate’s roughness does not exceed .
6.1.2 Test method
This test method is to use feeler gauge to measure the gaps BETWEEN some
positions within the measuring area of attachment face AND flat plate, then take
the maximum value as the flatness. Measure according to the following steps:
a) Put the flat plate on the wheel attachment face to make the flat plate cover
the measuring area, see Figure 1;
b) Use feeler gauge to measure the gaps between the flat plate and the
measuring area of attachment face. Measure at least 8 gaps for
commercial vehicle wheel, 4 for outer ring and 4 for inner ring. For
passenger vehicle, it shall measure each facet. Record the maximum gap;
NOTE: When cross-shaped flat plate is used, the number of flat plate rotation shall
not be less than twice.
c) Take the maximum gap as the flatness of wheel attachment face.
1 - flat plate or cross-shaped flat plate; 2 - wheel
a) Commercial vehicle wheel
1 - flat plate; 2 - wheel
b) Passenger vehicle wheel
Figure 1 -- Testing diagram of gap method I
6.2 Gap method II
6.2.1 Testing device
Testing gauge consists of flat plate (circular ring shape) and dial indicator. The
flat plate shall be able to cover measuring area. Its flatness shall be less than
or equal to 0.02 mm.
6.2.2 Test method
This test method is to use dial indicator to measure the gaps BETWEEN some
positions within the measuring area of attachment face AND flat plate, then take
the maximum value as the flatness. Measure according to the following steps:
a) Place the flat plate that is equipped with dial indicator on base plane for
zero-setting;
b) Place the flat plate on the wheel attachment face. Put the dial indicator
within the measuring area of attachment face. Record the difference
between dial indicator hand and zero position, see Figure 2;
c) Move the flat plate. Repeat the above step b). For commercial vehicle
wheel, it shall select not less than 20 points in a scattering way within the
measuring area of attachment face. Not less than 2 points are selected
within each facet of passenger vehicle wheel. For passenger vehicle
wheel, it shall select not less than 20 points in a scattering way within the
measuring area of attachment face;
d) Take the maximum difference hmax between dial indicator hand and zero
position as the flatness of attachment face.
1 - dial indicator; 2 - pull handle; 3 - carry handle; 4 - wheel; 5 - flat plate; 6 -
sliding block
a) Commercial vehicle wheel
1 - dial indicator; 2 - flat plate; 3 - wheel
b) Passenger vehicle wheel
Figure 2 – Testing diagram of gap method II
6.3 Indicator method
6.3.1 Testing device
Coordinate measuring machine.
6.3.2 Test method
This test method is to use coordinate measuring machine to measure the
amount of deviation between the measuring area of attachment face and the
measuring base plane so as to evaluate the flatness. Measure according to the
following steps:
a) Put the wheel on the workbench of coordinate measuring machine;
b) Within the measuring area of attachment face, randomly take three far
points to fit the base plane;
c) Move the measuring pointer. Measure the data of other points. Record the
reading of each point hi. It is positive when it is higher than the base plane,
negative when lower than the base plane. The points to be taken shall be
scattered as much as possible. Take not less than 20 points for
commercial vehicle wheel. Not less than 2 points shall be selected within
each facet for passenger vehicle wheel. For light alloy wheel of passenger
vehicle, it shall select not less than 20 points in a scattering way within
attachment face;
d) Take the difference between the maximum reading hmax and the minimum
reading hmin as the f...