QC/T 15-1992 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| QC/T 15-1992 | English | 150 |
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General test method for automobile plastic products
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QC/T 15-1992: General test method for automobile plastic products---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QCT15-1992
QC
AUTOMOTIVE INDUSTRY STANDARD
T 05
General test methods for
automotive plastic products
Issued on. MAY 21, 1992
Implemented on. JUNE 1, 1993
Issued by. China Automotive Industry Corporation
Table of Contents
1 Subject contents and application scope... 3
2 Normative references... 3
3 Test items... 3
4 General test conditions... 4
5 Test methods... 5
6 Evaluation items... 24
7 Test report... 26
Additional explanations... 26
General test methods for automotive plastic products
1 Subject contents and application scope
This Standard specifies the general test methods for automobile plastic molding products
(hereinafter referred as products).
This Standard is applicable to automobile plastic products but not to foaming products,
seats, electroplated products and coating products.
2 Normative references
GB 209 Sodium hydroxide for industrial use
GB 252 General diesel fuels
GB 435 Gasoline engine oil
GB 484 Vehicle used gasoline
GB 534 Industrial sulfuric acid
GB 2918 Plastics – Standard atmospheres for conditioning and testing
GB 5671 Lithium base grease for general purpose automobile
JB 3979 Test methods for automobile steering-wheel
QC/T 17 General rules for automative part weathering test
SY 4005 No.4604 synthetic brake oil
3 Test items
Test items include the 11 items as follows.
4 General test conditions
4.1 Standard environment conditions
The standard environment conditions are prescribed in GB 2918.
4.2 Specimen
The product which has been assembled and available for use can be used in a test as the
specimen.
4.3 Pre-treatment of specimen
The specimen, randomly selected from the products which have been placed for at least
24h since manufacturing, cannot undergo a test until being placed in the environmental
conditions as stipulated in 4.1 for no less than 4h or in other conditions agreed by supplier
and buyer if required.
5 Test methods
5.1 Temperature resistance test
Temperature resistance test is to examine the actual properties of products in high
temperature, low temperature, and high-low temperature alternating conditions.
5.1.2 Classification of applicable conditions
The following 10 applicable conditions which are classified according to the place of the
product mounted in a vehicle and the corresponding temperature conditions are described
in Table 3.
5.1.4 Test methods
One of test methods is selected by supplier and buyer upon agreement based on the heat
transfer conditions that the specimen undergoes.
5.1.4.1 Regular heat resistance test
5.1.4.2 Extreme heat resistance test
If the specimen is found no abnormality at the temperature as stipulated in Table 4 or the
surface temperature of which is that as stipulated in Table 5, continue to increase the
temperature of constant temperature chamber where the specimen is placed, 10°C or 5°C
for each time,
5.1.4.3 Cold resistant test
Regulate the temperature of low temperature chamber reaching that as stipulated in Table
4, and then put the specimen in the low temperature chamber for at least 4h. Take the
specimen out from the constant low temperature chamber, and examine it according to
the test items as stipulated in article 6.
5.2 Weathering test
Weathering test shall be carried out in accordance with QC/T 17.
5.3 Water resisting test
Water resisting test is to examine the variation of product in water absorption when
directly contacting water during use.
5.5 Chemical medium resistance test
Chemical medium resistance test is to examine the variation of product if submerged or
contacting the commonly used fuel, oil, lubricating oil, drugs or solvents (or chemical
media referred as follows).
5.5.3.3 Dropping test
5.6.4.2 Vibration endurance test
Vibration endurance test shall be carried out according to 6 grades, as stipulated in Table
13, based on the category of vehicle and the actual place where the product is installed;
that is, grades 2, 3, 4, 7, 9 and 11.The applicable classification shall be in accordance
with Table 13 and test time in accordance with Table 14.
5.7 Tests of Impact resistance
5.7.1 Classification of tests
The tests are classified into following three kinds based on impact methods.
5.7.3 Tests methods
5.7.3.1 Falling-weight impact tests
Tests devices. including and supporting mechanism of heavy bobs and specimens, control
mechanism for controlling heavy bobs’ free-fall, heavy bobs and staff-gauges. The heavy
bob’s head is spherical; its radius is 25 mm;
5.8 Abrasion resistance tests
5.8.1 Classification tests
According to the surface shape and the property of abrasion of products, the tests may be
classified into 3 forms.
5.10 Rigidity test
Rigidity tests are used to evaluate rigidity and assembly rigidity of products.
5.10.1 Test devices
Teat devices are as shown in Figure 5, including micrometer and push-pull pressure
gauge, which can obtain deflection curve line of load (as shown in Figure 6). The diameter
of fixation clamps and specimen width shall be in accordance with provisions in Table 20.
6 Evaluation items
Check shall be conducted in accordance with evaluation items and test items specified in
Table 22 according to separate needs after test is conducted in accordance methods
specified in article 5.
7 Test report
Test report shall include following items.
7.1 Report contents
7.2 Sub-items’ test report contents
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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