QC/T 242-2024_English: PDF (QC/T242-2024)
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Static unbalance requirements and test methods of vehicle wheels
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Static unbalance requirements and test methods of vehicle wheels
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| QC/T 242-2004 | English | 199 |
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Unbalance requirements and test methods of vehicle wheels
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| QC/T 242-1997 | English | 199 |
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(Car wheel unbalance requirements and test methods)
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| Standard ID | QC/T 242-2024 (QC/T242-2024) | | Description (Translated English) | Static unbalance requirements and test methods of vehicle wheels | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T22 | | Classification of International Standard | 43.040.50 | | Word Count Estimation | 10,176 | | Date of Issue | 7/19/2024 | | Date of Implementation | 1/1/2025 | | Drafting Organization | Baoding City Lizhong Wheel Manufacturing Co., Ltd., Dongfeng Automobile Chassis System Co., Ltd., Beijing Shuangyuan Tianheng Testing Technology Co., Ltd., Xingmin Lichi Co., Ltd., CITIC Dicastal Co., Ltd., Zhejiang Jingu Co., Ltd., Changchun FAW Fuwei Auto Parts Co., Ltd. Wheel Branch, Zhejiang Wanfeng Aowei Steam Turbine Co., Ltd., Daya Wheel Manufacturing Co., Ltd., Jiangsu Peran Co., Ltd., Zhengxing Wheel Group Co., Ltd., Jiangsu Kate Auto Parts Co., Ltd. | | Administrative Organization | National Technical Committee for Standardization of Automobiles (SAC/TC 114) | | Proposing organization | National Technical Committee for Standardization of Automobiles (SAC/TC 114) | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | | Standard ID | QC/T 242-2014 (QC/T242-2014) | | Description (Translated English) | Static unbalance requirements and test methods of vehicle wheels | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T22 | | Classification of International Standard | 43.040.50 | | Word Count Estimation | 9,966 | | Date of Issue | 2014/10/14 | | Date of Implementation | 2015/4/1 | | Older Standard (superseded by this standard) | QC/T 242-2004 | | Quoted Standard | GB/T 4201-2006; GB/T 6444-2008; JJF 1151-2006 | | Drafting Organization | Baoding Lizhong Wheel Manufacturing Co., Ltd. | | Administrative Organization | National Automotive Standardization Technical Committee | | Regulation (derived from) | People's Republic of China Ministry of Industry and Information Technology Notice 2014 No. 63 | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | | Summary | This Standard specifies the requirements and the amount of static unbalance wheel detection methods. This Standard applies to car wheels. | | Standard ID | QC/T 242-2004 (QC/T242-2004) | | Description (Translated English) | Unbalance requirements and test methods of vehicle wheels | | Sector / Industry | Automobile & Vehicle Industry Standard (Recommended) | | Classification of Chinese Standard | T22 | | Classification of International Standard | 43.040 | | Word Count Estimation | 3,394 | | Date of Issue | 2004-10-20 | | Date of Implementation | 2005-04-01 | | Older Standard (superseded by this standard) | QC/T 242-1997 | | Quoted Standard | GB/T 2933-1995; GB/T 3487-1996 | | Drafting Organization | Changchun FAW Sihuan Automobile Co., Ltd. Wheel Branch | | Administrative Organization | National Automotive Standardization Technical Committee | | Regulation (derived from) | Development and Reform Bulletin (04/ 61) | | Summary | This standard specifies the automobile wheel unbalance requirements and test methods. This standard applies to automobile wheel spokes plate. |
QC/T 242-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
CCS T 22
Replacing QC/T 242-2014
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
ISSUED ON: JULY 19, 2024
IMPLEMENTED ON: JANUARY 1, 2025
Issued by: Ministry of Industry and Information Technology of the People’s
Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Test Samples ... 6
5 Test Equipment ... 6
6 Requirements for the Amount of Static Unbalance ... 6
7 Test Methods ... 7
Foreword
This document was drafted in accordance with the rules provided in GB/T 1.1-2020 Directives
for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This document serves as a replacement for QC/T 242-2014 Static Unbalance Requirements and
Test Methods of Vehicle Wheels. In comparison with QC/T 242-2014, apart from structural
adjustments and editorial modifications, the main technical changes are as follows:
a) The terms and definitions are modified (see Chapter 3; Chapter 3 of Version 2014);
b) The requirements for valve configuration for the test of light alloy wheels are
modified (see Chapter 4; Chapter 4 of Version 2014);
c) The requirements for the test equipment are added (see Chapter 5);
d) The requirements for the amount of static unbalance of light alloy wheels on
commercial vehicles are modified (see Chapter 6; Chapter 5 of Version 2014);
e) The test methods are modified (see Chapter 7; Chapter 6 of Version 2014).
Please be noted that certain content of this document may involve patents. The institution
issuing this document does not undertake the responsibility of identifying these patents.
This document was proposed by and shall be under the jurisdiction of National Technical
Committee 114 on Auto of Standardization Administration of China (SAC/TC 114).
The drafting organizations of this document: Baoding Lizhong Wheel Manufacturing Co., Ltd.;
Dongfeng Motor Chassis Systems Co., Ltd.; Beijing Shuangyuan Tianheng Testing Co., Ltd.;
Xingmin Lichi Co., Ltd.; CITIC Dicastal Co., Ltd.; Zhejiang Jingu Co., Ltd.; Changchun
FAWAY Automobile Components Co., Ltd. Wheel Branch Company; Zhejiang Wanfeng Auto
Wheels Co., Ltd.; Dare Wheel Manufacturing Co., Ltd.; Jiangsu POMLEAD Co., Ltd.;
Zhengxing Wheel Group Co., Ltd.; Jiangsu KAITE Automobile Parts Co., Ltd.
The main drafters of this document: Zhang Jianliang, Ma Jianhua, Pan Xiaoyu, Guo Weijian,
Chen Yunjing, Wei Chenguang, He Genglei, Cheng Xiaoqiang, Ye Yanfei, Zhang Shijiang, Mao
Qiuxian, He Guoyuan, Wan Jinhua, Ning Yuncheng, Li Ping, Li Wenjian.
The issuing of the previous versions:
---Firstly issued in 1997 as QC/T 242-1997, firstly revised in 2004 and secondly revised
in 2014;
---This is the third revision.
Static Unbalance Requirements and Test Methods of Vehicle
Wheels
1 Scope
This document specifies the requirements and test methods for the static unbalance of vehicle
wheels.
This document is applicable to the determination of static unbalance of vehicle wheels.
2 Normative References
The content of the following documents constitutes indispensable clauses of this document
through normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
GB/T 2933 Wheels and Rims for Pneumatic Tyres - Vocabulary, Designation and Marking
GB/T 6444 Mechanical Vibration - Balancing - Vocabulary
GB/T 9239.21 Mechanical Vibration - Rotor Balancing - Part 21: Description and Evaluation
of Balancing Machines
3 Terms and Definitions
The terms and definitions defined in GB/T 2933 and GB/T 6444, and the following are
applicable to this document.
3.1 mass eccentricity
The distance from the center of mass of the wheel to the centerline of the wheel.
3.2 amount of static unbalance
The product of the wheel mass multiplied by the mass eccentricity (3.1).
NOTE 1: the unit is (g cm).
NOTE 2: as shown in Figure 1, expressed in Formula (1):
......
QC/T 242-2014
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
T 22
Replacing QC/T 242-2004
Static Unbalance Requirements and Test Methods of
Vehicle Wheels
ISSUED ON: OCTOBER 14, 2014
IMPLEMENTED ON: APRIL 01, 2015
Issued by: Ministry of Industry and Information Technology of the PRC
Table of Contents
Foreword ... 6
1 Scope ... 8
2 Normative References ... 8
3 Terms and Definitions ... 8
4 Inspection Sample ... 8
5 Requirements for Static Unbalance ... 9
6 Test Methods ... 9
Foreword
This Standard was drafted as per the rules specified in GB/T 1.1-2009 Directives for
Standardization – Part 1: Structure and Drafting of Standards.
This Standard replaced QC/T 242-2004 Unbalance Requirements and Test Methods
of Vehicle Wheels since the date of implementation.
Compared with QC/T 242-2004, the major technical differences of this Standard are
as follows:
--- Modify the name of the standard; and changed it into Static Unbalance
Requirements and Test Methods of Vehicle Wheels;
--- Modify the scope of the standard: applicable to automobile wheels (see Clause
1 of 2004 Edition; Clause 1 of this Edition);
--- Modify the normative references: delete GB/T 2933-1995, GB/T 3487-1996; and
add GB/T 4201-2006 Description Verification and Evaluation of Balancing
Machines (ISO 2953: 1999, IDT), GB/T 6444-2008 Mechanical Vibration -
Balancing Vocabulary (ISO 1925:2001, IDT), JJF 1151-2006 Calibration
Specification for Wheel Dynamic Balancers (see Clause 2 of 2004 Edition;
Clause 2 of this Edition);
--- Add the terms and definitions (see Clause 3 of this Edition);
--- Add the requirements for inspection samples of light alloy wheels, two-piece rim
wheels and three-piece rim wheels (see Clause 4 of this Edition);
--- Change all "requirements for unbalance of wheels" into "requirements for static
unbalance" (see Clause 3 of 2004 Edition; and Clause 5 of this Edition):
--- Modify Table 1 "Requirements for static unbalance of passenger car wheels".
According to the different surface treatment methods, the requirements for static
unbalance of painted wheels and electroplated wheels are respectively specified.
(See Table 1 in Clause 3 of 2004 Edition; Table 1 in Clause 5 of this Edition);
--- Modify Table 2 "Requirements for static unbalance of commercial vehicle wheels".
According to different wheel materials, the requirements for static unbalance of
light alloy wheels and steel wheels of commercial vehicle are respectively
specified (see Table 2 in Clause 3 of 2004 Edition; Tables 2 and 3 in Clause 5 of
this Edition);
--- Modify the requirements for testing equipment; stipulate the selection, evaluation
criteria and calibration requirements for the balancer (see 4.3 of 2004 Edition;
Static Unbalance Requirements and Test Methods of
Vehicle Wheels
1 Scope
This Standard specifies the static unbalance requirements and test methods of vehicle
wheels.
This Standard is applicable to the vehicle wheels.
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 document.
GB/T 4201-2006 Description Verification and Evaluation of Balancing Machines
(ISO 2953: 1999, IDT)
GB/T 6444-2008 Mechanical Vibration - Balancing Vocabulary (ISO 1925:2001,
IDT)
JJF 1151-2006 Calibration Specification for Wheel Dynamic Balancers
3 Terms and Definitions
For the purposes of this Standard, the terms and definitions given in GB/T 6444-2008
apply.
4 Inspection Sample
4.1 The inspection sample shall be a new finished wheel that has not been used or
tested.
4.2 When testing light alloy wheels, a valve cock or a substitute of the same quality
shall be installed at the corresponding position of the valve port.
4.3 For two-piece rim wheels and three-piece rim wheels, it is permissible not to be
......
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