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QC/T 242-2014 (QCT 242-2014)

QC/T 242-2014_English: PDF (QCT242-2014)
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QC/T 242-2014English110 Add to Cart 0--3 minutes. Auto-delivered. Static unbalance requirements and test methods of vehicle wheels QC/T 242-2014 Valid QC/T 242-2014

BASIC DATA
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Older Standard (superseded by this standard) QC/T 242-2004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.

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