QC/T 629-2021 English PDF (QCT629-2021)

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QC/T 629-2021: Automobile sun shield
QC/T 629-2021
QC
AUTOMOBILE INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Replacing QC/T 629-2005
Automobile sun visor
ISSUED ON: MARCH 05, 2021
IMPLEMENTED ON: JULY 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 5
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 8
4 Technical requirements ... 9
5 Test method ... 12
6 Inspection rules ... 20
7 Marking, packaging, transportation, storage ... 22
Appendix A (Normative) Method for determining equivalent moment of sun visor
... 24
Automobile sun visor
1 Scope
This document specifies the terms and definitions, technical requirements, test
methods, inspection rules, marking, packaging, transportation, storage of
automobile sun visors.
This document applies to automobile sun visors (not including roller blinds,
tinted glass and other types of sun visors).
2 Normative references
The contents of the following documents constitute the indispensable clauses
of this document through normative references in the text. Among them, for
dated reference documents, only the version corresponding to that date is
applicable to this document; for undated reference documents, the latest
version (including all amendments) is applicable to this document.
GB/T 250-2008 Textiles - Tests for color fastness - Grey scale for assessing
change in color
GB 8410 Flammability of automotive interior materials
GB 11551 The protection of the occupants in the event of a frontal collision
for motor vehicle
GB 11552 The interior fittings of passenger car
GB 11562-2014 Motor vehicles forward visibility for drivers - Requirements
and measurement methods
GB/T 16422.2-2014 Plastics - Methods of exposure to laboratory light
sources - Part 2: Xenon-arc sources
GB 38262 Flammability of interior materials for buses
QC/T 484 Automotive paint coating
QC/T 625 Metallic coatings and conversion coatings for automobiles
3.7
The spring back angle
The included angle of the sun visor body, from the rebound starting point to
the rebound end point.
3.8
Working area
The area, which is covered by the sun visor body, when is flipped from the
rebound starting point to the foremost position, that is, the actual use range
of the sun visor body.
4 Technical requirements
4.1 General requirements
4.1.1 The sun visor shall conform to the product drawings and design
documents, which are approved by the prescribed procedures.
4.1.2 The sun visor is installed on the upper beam of the automobile windshield
frame, the upper end of the front windshield, or the A-pillar and other parts,
which have certain strength. When the sun visor body rotates around the X axis,
to the lowest position of its lower edge, THEN, for the category M1 vehicle, the
lower edge of the sun visor may be within the range 0° ~ 2° of the pitch angle,
which is determined by the V1 point specified in GB 11562-2014. For the other
categories of vehicles, the lower edge of the sun visor may be located within
the range 0° ~ 4° of the pitch angle, which is determined by the V1 point
specified in GB 11562-2014. when the sun visor is not in use, it shall not reduce
the driver’s front vision.
4.1.3 The body of the sun visor shall be made of energy-absorbing and shock-
absorbing materials OR the surface covered with flexible materials OR
designed as an energy-absorbing and shock-absorbing structure. The sun visor
shall not have sharp corners. The sun visor of category M1 vehicles shall meet
the requirements of GB 11552.
4.1.4 The sun visor shall be adjusted flexibly, smoothly, without abnormal noise.
It can be stopped at any position, in the work area; it shall not change position
with the vibration of the vehicle body.
4.1.5 For vehicles, which are equipped with airbags on the front passenger side,
the sun visor's label shall meet the requirements of GB 11551.
4.2 Appearance requirements
4.2.1 The color and pattern of the sun visor shall be consistent with the color
plate or sample, which is approved by the specified procedures.
4.2.2 If heat-sealed seams are used around the sun visor, the height of the heat-
sealed seams shall not be greater than 0.5 mm.
4.2.3 The sun visor body and accessories shall have a smooth appearance,
without warping.
4.2.4 The skin of the sun visor shall be free from defects, such as wrinkles,
bumps, ripples, slack, cracks, stains, peeling off of warning labels.
4.2.5 The surface of plastic parts shall be smooth and free of defects, such as
burrs, warpage, obvious parting lines.
4.2.6 The metal installation parts must be corrosion-resistant; the surface shall
be smooth AND free from cracks or rust. The metal plating layer and chemical
treatment layer shall meet the relevant requirements of QC/T 625. The paint
coating shall meet the relevant requirements of QC/T 484.
4.2.7 After the sun visor is assembled according to the actual assembly position
in the vehicle, the cantilever end of the body shall fit the mounting surface; the
body shall not sag.
4.3 Performance requirements
4.3.1 Operating torque
4.3.1.1 Operating torque of sun visor rotating around X axis (referred to as
vertical operating torque): At any position during the turning process, for the
category N vehicles, the minimum operating torque of the sun visor shall be
greater than the equivalent torque, when the vibration acceleration of the sun
visor is 50 m/s2 (calculation method as shown in Appendix A); for the vehicles
of other categories, the minimum operating torque of sun visor shall be greater
than the equivalent torque, when the vibration acceleration of the sun visor is
35 m/s2 (calculation method as shown in Appendix A); the maximum operating
torque shall be less than 4 N • m (when the minimum operating torque is not
less than 4 N • m, the operating torque can be determined, through negotiation,
between the supplier and the buyer).
4.3.1.2 The operating torque of the sun visor rotating around the Y axis (referred
to as the horizontal operating torque): At any position, the minimum operating
torque shall be greater than 0.4 N • m; the maximum operating torque shall be
less than 4 N • m. This requirement does not apply to non-rollover type sun
visor.
After testing in accordance with the provisions of 5.13, the sun visor shall be
free from warpage, deformation, discoloration, cracks, loose connections, or
other abnormal changes.
4.3.11 Resistance to low temperature
After testing in accordance with the provisions of 5.14, the sun visor shall meet
the provisions of 4.3.1 and 4.3.3.2; the body shall have no abnormal noise,
during the turning process.
4.3.12 Lightfastness
After testing in accordance with the provisions of 5.15, there shall be no
abnormal changes in the appearance of the sun visor, such as deformation,
chalking, or cracking; the gray-scale color fastness level shall be greater than
or equal to level 4, in accordance with the provisions of GB/T 250-2008.
4.3.13 Combustion characteristics
The combustion characteristics of passenger car's sun visors shall meet the
requirements of GB 38262. The combustion characteristics of the sun visors of
other vehicles shall meet the requirements of GB 8410.
5 Test method
5.1 Test conditions
The test shall be carried out in an indoor environment: The test temperature
shall be 23°C ± 5°C' the relative...