serial number

The date of sample delivery

Models

The type of trial

Product name

client

Pilot project

Test criteria

Test Method

Image

(Test Method)

Test objective requirements

Image

(Test Objective Requirements)

Trial cycle

(days)

Test equipment

remark

Steering wheel body test

1#

Steering wheel assembly

ELV Inspection (Parts)

Q/JKE J01.050-2017

Each homogeneous material prohibited substance in automobiles and their parts products must meet the requirements of "2000/53/EC on end-oflife".

vehicles" and GB/T 30512-2014 Requirements for Prohibited Substances in Automobiles (its latest version (including all modification orders) applies

Pb (lead), Hg (mercury), Cr (VI) (hexavalent chromium) in all homogeneous materials except for the exemption list

The mass percentage shall not exceed 0.1%, the mass percentage of Cd (cadmium) shall not exceed 0.01%, polybrominated biphenyls (PBBs), and more

The mass percentage of bromodiphenyl ethers (PBDEs) must not exceed 0.1%. The supplier must submit an ELV test report.

QC/T 941-2013 Methods for the detection of mercury in automotive materials;

QC/T 942-2013 Methods for the detection of hexavalent chromium in automotive materials;

QC/T 944-2013 Methods for the detection of polybrominated biphenyls (PBBs) and polybrominated diphenyl ethers (PBDEs) in automotive materials

Inductively coupled plasma spectrometer

X-ray fluorescence spectrometer

UV-Vis spectrophotometer

Steering wheel body test

1#-3#

Body assembly

Heat resistance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

After the test, the discoloration grade ≥ 3.5 was evaluated according to the method in GB/T 250-2008, and there was no stickiness, no detachment, no deformation, no obvious cracks, blistering and other defects

When the temperature of the incubator rises to 90°C, put the steering wheel into the incubator, control it within the temperature range of 90°C±2°C, keep it for 8 hours, and then take it out to observe its appearance changes

Programmable constant temperature and humidity chamber

Steering wheel body test

1#-3#

Body assembly

Cold resistance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

After the test, the discoloration grade was evaluated according to the method in GB/T 250-2008, and the discoloration grade was required to be ≥ 3.5, and there was no stickiness, no detachment, no deformation, no obvious cracks, blistering and other defects

The temperature of the cryogenic chamber drops to -30°C, put the steering wheel into the cryogenic chamber, and control it within the temperature range of -30°C±2°C, keep it for 7 hours and then take it out to observe its appearance changes

Programmable constant temperature and humidity chamber

Steering wheel body test

1#-3#

Body assembly

Hot and cold alternating test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

After the test, it was observed after 24 hours at room temperature, and the gray sample card for staining was evaluated according to GB/T 251-2008, and the discoloration grade was required to be ≥ 3.5, and there was no stickiness, no detachment, no deformation, no obvious cracks, blistering and other defects

The steering wheel is subjected to cold and hot alternating tests at the temperature and time specified in the table below in the environment of high temperature, room temperature, low temperature, high temperature and high humidity. The cold and hot cycle is 48 hours, and the appearance change is observed after the sample is completed for 5 cycles, and at the end of each cycle, the appearance change of the steering wheel should be paid attention to at any time and recorded

High and low temperature alternating test chamber (rapid temperature change)

Steering wheel body test

4#-6#

The body assembly is truncated

Xenon lamp aging test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

After the end of the test, it was placed at room temperature for 24 hours and observed, and the gray sample card for staining was evaluated according to GB/T 251-2008, and the discoloration grade was required to be ≥ 3.5, and there were no obvious defects such as stickiness, cracks, deformation cracks, and blistering

时间125个循环。
a）监测点：窗
玻璃过滤片;
c）辐照度：（1.20±0.02）W/㎡
d）试验步骤
——光照阶段89±3°C的黑板温度，62°C±2°C的箱体空气温度，50%±5%的相对湿度，运行时间228分钟;
——黑暗阶段38°C±3°C的黑板温度，38°C±3°C的箱体空气温度，95%±5%的相对湿度，运行时间60分钟

Xenon lamp aging test chamber

Steering wheel body test

7#-9#

skeleton

Static flexure test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a）试验条件、步骤符合6.6中规定。
b）第一步加载：F=±500N，试验时要求：转向盘轮缘的总变形量< 20mm;试验结束后要求：记录转向盘轮缘的塑性变形量，骨架无裂纹产生、无断裂产生。
c）第二步加载：F=±700N，试验时要求：转向盘轮缘的总变形 < 30mm;试验结束后要求：记录转向盘轮缘的塑性变形量，骨架无裂纹产生、无断裂产生。
注：此试验采用骨架测试。

试验过程及要按照下面步骤进行（必须排除包覆层的变形）：
a）第一步加载：F=±500N，记录载荷与位移曲线，加载5min后取转向盘的弯曲变形值，精确到0.1mm，测量完毕后立即卸去负荷;静止恢复3min后再次测量同一点转向盘的弯曲永久变形值，精确到0.1mm。
b）第二步加载：F=±700N，记录载荷与位移曲线，加载5min后取转向盘的弯曲变形值，精确到0.1mm，测量完毕后立即卸去负荷;静止恢复3min后再次测量同一点转向盘的弯曲永久变形值，精确到0.1mm。
注：塑性变形是卸去负荷后静止3min后测试的转向盘弯曲不可恢复的变形值

Static flexure testing machine

Steering wheel body test

10#-12#

skeleton

Static torsion test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and steps are in accordance with the provisions of 6.7.

b) The first step is loaded: M=150N•m, and the total deformation angle is required to be ≤3° during the test; After the test, the plastic deformation angle of the steering wheel skeleton is required to be ≤ 1.2° and there is no crack.

c) The second step loading: M=250N•m, the total deformation angle is required to be ≤5° during the test; After the test, the plastic deformation angle of the steering wheel skeleton is required to be ≤3° and there are no cracks.

Note: This test uses a skeletal test.

a) The first step is loaded: M=150N·m, the load and displacement curves are recorded, the deformation value is taken to remove the load after 5 min of loading, and the plastic deformation angle of the steering wheel is measured after 3 min of static recovery;

b) The second step of loading: M=250N·m, record the load and displacement curve, take the deformation value to remove the load after 5 min of loading, and measure the plastic deformation angle of the steering wheel after 3 min of static recovery.

Static torsion testing machine

Steering wheel body test

13#-15#

skeleton

Flexural fatigue strength test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods comply with the provisions of 6.8;

b) After the test, the specimen shall not have obvious plastic deformation visually, and there shall be no cracks and skeleton fractures everywhere, and the screws shall not be loose and the parts shall not fall. After the test, test whether the residual torque of the steering wheel and the pipe mating preload nut maintains more than 80% of the original torque.

Note: The residual preload of the nut is required to be tested, but it is not used as the basis for determining whether the test is OK

The steering wheel assembly is fixed on the tooling, and the fasteners are tightened according to the specified torque. It is clamped with a clamping device at 12 o'clock on the rim of the steering wheel, and the clamping width is 30mm. A sinusoidal force is applied to the steering wheel assembly by clamping device, the pulling force is 300N, the pressure is 100N, the direction of the force is at an angle of 60 ° with the plane of the steering wheel rim, the frequency is 1Hz, and the test ends after 130,000 cycles, as shown in Figure 6:

Flexural fatigue test bench

Steering wheel body test

16#-18#

skeleton

Torsional fatigue strength test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods are in accordance with the provisions of 6.9.

b) After the test, the specimen shall not have obvious plastic deformation visually, and there shall be no cracks and skeleton fractures everywhere, and the screws shall not be loose and the parts shall not fall. After the test, test whether the residual torque of the steering wheel and the pipe mating preload nut maintains more than 80% of the original torque.

Note: The residual preload of the nut is required to be tested, but it is not used as the basis for determining whether the test is OK

The steering wheel assembly is fixed on the tooling, and the fasteners are tightened according to the specified torque. It is clamped with a clamping device at 12 o'clock and 6 o'clock on the wheel rim of the steering wheel with a clamping width of 30mm. A sinusoidal force of ±250N is applied to the steering wheel assembly through the clamping device, and the direction of the force is tangent to the steering wheel rim through the clamping point, the frequency is 1Hz, and the test ends after 130,000 cycles, as shown in Figure 7:

Torsional fatigue test bench

Steering wheel body test

19#-21#

skeleton

Casing ejection test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods comply with the provisions of 6.10.

b) After the test, the casing can withstand at least 27KN ejection force, and the skeleton can not have any rupture.

Note: This test is only applicable to steering wheels with iron splines embedded in the steering wheel

A pressure testing machine is used to apply an axially downward increasing load P at the top of the column mandrel until the casing is detached from the skeleton. The force-displacement curve was recorded in this process, and the load change rate of the test process was 25.3±2mm/min

Pressure testing machine (casing ejection test)

Steering wheel body test

22#-24#

Steering wheel assembly

Vibration test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods are in accordance with the provisions of 6.12;

b) During and after the test, there are no cracks and damage to the skeleton, no damage to other components, no loosening of screws, etc.

Note: The entire steering wheel assembly can be tested together (including the electrical switch part)

a) This test is dedicated to specimens mounted on spring-loaded bodies. The vibration in this regard is broadband random vibration, which is caused by a bad road section (Belgian road).

b) Broadband random vibration test, the specimen is in working mode 3.2.

——Implemented in accordance with the requirements of GB/T 2423.56;

- Acceleration RMS: 27.1m/s2;

– The vibrational waveform and its corresponding values are shown in Figure 11 and Table 10.

- Vibration direction: each direction of the three axes of the vehicle X, Y and Z is done for 8h;

Composite shaker

Steering wheel body test

25#-27#

Steering wheel assembly

Odor test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

The odor level of steering wheel products ≤ 3.5;

Refer to 5.4.2 in Q/BYDQ-A1901.404 "Test Method for Odor of Auto Parts".

The steering wheel is recommended to be tested in a 100-liter container. The container is not filled with water, and the lid of the test container is tightly placed in the preheated electric constant temperature blast drying oven and heated to a temperature of (80±2) °C for 120±10min. The test vessel was removed from the incubator and cooled to (60±5) °C for evaluation

Steering wheel body test

28#-30#

Steering wheel assembly

VOC test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The concentration requirements of volatile organic compounds and aldehydes and ketones in parts and components shall meet the following table: unit: mg/m³;

According to method 1 in Q/BYDQ-A1901.771-2017 "Detection method for volatile organic compounds and aldehydes and ketones in crew cabin parts".

a) Test equipment requirements: the sampling bag is made of Tedlar film, and the volume of the sampling bag is 2000L;

d) Test temperature: sampling bag problem (40±2) °C, holding time (270±5) min;

Bag-based VOC test sampling chamber

High performance liquid chromatograph

Thermal desorption-gas chromatography mass spectrometry

Walk-in incubator

Steering wheel body test

31#-33#

Specimens

Atomization test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods are in accordance with the provisions of 6.15;

b) The condensation component measured in the test meets the ≤10mg.

The test conditions and methods are carried out in accordance with DIN 75201-1992-B

Nebulizer

Steering wheel body test

34#-36#

Body assembly

Solvent resistance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and test methods are in accordance with the provisions of 6.16.

b) The specimen should be free of defects such as swelling, discoloration, cracks, sticky hands, etc.

Programmable constant temperature and humidity chamber

Steering wheel body test

34#-36#

Body assembly

Abrasion resistance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test equipment, conditions and procedures comply with the provisions of 6.17;

b) After the test piece has undergone the abrasion test, the texture is not allowed to disappear and the surface coating is exposed.

Note: 4000 for autocorticoid skin, 5000 for whole skin or bark wood, 2500 for genuine leather

Abrasion Tester (Taer)

Steering wheel body test

34#-36#

Body assembly

Colour fastness to rubbing

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) Colour fastness to rubbing≥ grade 4;

b) After the test, there are no abnormal phenomena such as cracking and discoloration.

The test is carried out according to the method specified in GB/T3920. On the wheel rim, take a 150mm long section of steering wheel skin or use the same size of unsewn leather, install it on the rubbing color fastness tester, after 100 times of friction, according to the provisions of GB/T 251, use the color staining and gray sample card to compare and evaluate the grade

Abrasion Tester (Taer)

Steering wheel body test

34#-36#

Body assembly

Sweat resistance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods are in accordance with the provisions of 6.19;

b) After the test, the surface of the steering wheel rim should not be changed, i.e. it should not be dull, and bubbles, color changes and stickiness should not be allowed.

a) at a temperature of 35±2°C;

b) Artificial sweat. Preparation: 8g of dibasic phosphate dibasic (Na2HPO4), 8g of sodium chloride (NaCl) and 5g of acetic acid (CH3COOH) were dissolved in 1L of distilled water, and the mixture (pH=4.5) was artificial sweat.

c) Test time: 4h;

d) Soak the part of the steering wheel in artificial sweat, place it under the specified test conditions, wipe off the artificial sweat on the steering wheel with dry gauze after taking it out, and check whether there are abnormal changes on the surface

Steering wheel body test

37#-39#

Foam body

Surface hardness test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test equipment, conditions and steps comply with the provisions of 6.20;

b) The test results of the full leather type for the foaming material should be within the range of (60±7) Shore A, and if the drawings are clearly defined, the test results meet the requirements of the drawings

Shore A hardness tester

Steering wheel body test

40#-42#

Specimens

Combustion performance test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test method is in accordance with the provisions of 6.22.

b) The combustion velocity measured by the specimen ≤ 80mm/min.

The test conditions and methods of combustion performance are carried out in accordance with GB 8410-2006

Steering wheel body test

43#-45#

Steering wheel assembly + DAB

Horn pressure test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The horn should be pressed flexibly, without stagnation, abnormal pressing and other phenomena;

b) The recommended range of the operating force of the horn of the steering wheel assembly at room temperature is 25~55N, and the horn mechanism can sound normally;

c) Test conditions and methods in accordance with 6.23.

In the following sequential tests, the operating force of the horn mechanism is checked at the beginning of the b), d) and f) phases, and the center position of the upper surface of the two horn buttons is touched vertically downward at a speed of 30mm/s

a) At 38 °C and humidity 95% (minimum), place soil for 2h for 12min;

b) At room temperature, leave 30 soil for 5min;

c) At 85 soil at 2 °C, place 2h soil for 12min;

d) At room temperature, leave 30 soil for 5min;

e) At -30 soil at 2 °C, place 2h soil for 12min.

f) At room temperature, leave 30 soil for 5min;

Steering wheel body test

43#-45#

Steering wheel assembly + DAB

Horn durability test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods comply with the provisions of 6.24;

b) Each contact shall be tested for 100,000 times, and the samples should be free of destruction and loosening during and after the test, and the other parts should not be damaged and fall off, and the bolts should not be loose. Before the test, the voltage drop is not more than 0.3V, and after the test, the voltage drop is not more than 0.5V.

c) After the test, the attenuation/increase of the horn press pressure should be within the range of ±25% of the pressure value before durability

Voltage: 14V±0.2V;

Current: 1±0.5A;

Loading load: (35±10)N;

Load direction: perpendicular to the upper cover;

Point of action: the center of the upper cover;

Intermittent time: 1 s, (3~4) s;

Contact and disengagement speed: (4~6) cm/s.

Test the voltage drop before and after the steering wheel contacts are used, accurate to 1mV.

Endurance test bench

Steering wheel body test

46#-48#

Steering wheel assembly + DAB

Moment of inertia test

Q/BYDQ-A1906.6242.1—2020 "General Technical Conditions for Passenger Car Steering Wheel Assembly Part 1: Steering Wheel Body"

a) The test conditions and methods comply with the provisions of 6.26;

b) The moment of inertia J≤50 N•mm•S² is required.

The steering wheel and the airbag assembly are installed on the test bench, and the bench drives the steering wheel assembly to rotate the sine wave at a fixed frequency, and the center of the rotating shaft is the central axis position of the steering wheel spline, the rotation angle range is ±45 °, the frequency is 1.5Hz, the measurement is 10 cycles, the angle acceleration and torque curve are recorded, and the moment of inertia result is calculated, and the moment of inertia J≤50N•mm•S2 is required.

Test bench for electric power steering systems

Steering wheel switch group test

22#-24#

Steering wheel assembly

Vibration test

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

The test shall be carried out according to 5.10.1 of this standard. After the test, the parts should be free of damage, the fasteners should be not loose, and the gear conversion force should meet the requirements of design and development.

Note: This test can be carried out with the assembly, but the relevant test report must be included in the OTS data

The test is carried out in accordance with the requirements of 4.1.3.1.3 body accessories for passenger cars (including dual-mode vehicles) in Q/BYDQ-A1901.707.3. The specimen shall meet the relevant requirements of Table 5 in 4.6 of this standard.

5.5.1.1 Test temperature

In automobiles, the occurrence of vibration fatigue stress is generally accompanied by extreme low or high temperature environments. Therefore, the sample should be subjected to the temperature curve shown in Figure 15 and the temperature values shown in Table 14 should be applied to the sample throughout the vibration test cycle.

5.5.1.3 Test Method:

a) The test is dedicated to specimens mounted on spring-loaded bodies, where the vibrations are broadband random vibrations and are caused by undesirable road sections (Belgian roads)

b) Broadband random vibration test, the specimen is in working mode3.2.

--- shall be implemented in accordance with the requirements of GB/T 2423.56.

--- acceleration RMS: 27.1m/s²;

--- vibration waveforms and corresponding values are shown in Table 17 and Table 20.

--- vibration direction: each direction of the three axes of the vehicle X/Y/Z is done for 8h.

Test requirements: 1. Test according to 5.5.1 of this standard.

2. In the test, there should be no timeliness such as skipping gears and false triggering of the switch function in each working gear. After the test, the parts should be free of damage, and the fasteners should not be loose, in line with the requirements of 4.4 (functional test) and 4.9.1 (gear conversion).

Performance requirements: After the test, the specimen function should meet the requirements of performance level A.

Composite shaker

Steering wheel switch group test

1#-3#

Steering wheel switch group

Durable at high temperatures

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.1 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Working category: working mode 1.2 or 3.2, working voltage is 12V, and the sample is checked at 3 points (voltage 9V, 12V, 16V) before the end of the test; b) Test time: 600h; c) The test temperature :Top.max=85 °C, Tmax, RR=95 °C, and the high temperature durability test is carried out according to the test procedure in Table 21. d) Handling of test interruption: interruption is allowed in the test, and the test can be continued from the interruption, but the interruption should not be too frequent, and the continuous test time is required to be not less than 96h, if it is less than 96h, then recalculate 96h; Disruptions must be noted in the report.

Performance requirements: After the test, the function of the specimen should meet the requirements of performance level A, and meet the requirements of 4.4 (functional test) and 4.9.1 (gear conversion).

High and low temperature damp heat test chamber

Steering wheel switch group test

1#-3#

Steering wheel switch group

Operates at low temperatures

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.2 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Working category: working mode 1.2, 2.1 and 3.2, working voltage adopts 12V; b) Test temperature: -40 °C, T(op.min) = -30 °C, according to Table 22 low temperature start test procedure; c) Treatment of test interruption: If there is an interruption in the test, the sample will be re-sampled, and the sample can not be replaced, and the interruption should be noted in the report.

Performance requirements: After the test, the function of the specimen should meet the requirements of performance level A, and meet the requirements of 4.2 (appearance requirements), 4.4 (functional test) and 4.9.1 (gear conversion).

High and low temperature damp heat test chamber

Steering wheel switch group test

4#-6#

Steering wheel switch group

Thermal shock

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.5 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Working Category: Working Mode 1.1;b) Test Temperature: T(op.max)=85°C, -40°C; c) Conversion time: <30s, d) Number of cycles: 75 cycles, one high temperature and one low temperature for one cycle; e) Temperature holding time: 30min (maximum and minimum temperature). After the test, the switch is removed and placed at room temperature to bring the switch back to room temperature, and then the switch is tested.

Performance requirements: After the test, the function of the specimen should meet the requirements of performance level A, and meet the requirements of 4.2 (appearance requirements), 4.4 (functional test) and 4.9.1 (gear conversion).

High and low temperature alternating test chamber (rapid temperature change)

Steering wheel switch group test

4#-6#

Steering wheel switch group

Temperature changes

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.6 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Working category: working mode 2.1 and 3.2; working mode is 3.2 (voltage 12V) in the heating and high temperature stage, and 2.1 in other times; b) Test time: 225 cycles; c) Test conditions: see Figure 24, temperature holding time: hold at -40 °C for 1.5h, hold at 85 °C for 2h;d) Temperature rate: 2 °C/min~10 °C/min; e) Handling of trial interruptions: If there is an interruption, the experiment is continued from the beginning of the cycle.

Performance requirements: After the test, the function of the specimen should meet the requirements of performance level A, and meet the requirements of 4.2 (appearance requirements), 4.4 (functional test) and 4.9.1 (gear conversion).

High and low temperature alternating test chamber (rapid temperature change)

Steering wheel switch group test

4#-6#

Steering wheel switch group

Damp heat cycle

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.4 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Work category: working mode 2.1 and 3.2 b) Test time: 10 cycles, each cycle is 24h; c) Test conditions: the temperature change is shown in Figure 23, the odd cycle contains a low temperature section, the even cycle does not contain a low temperature section (low temperature is replaced by 23 °C), the humidity is not controlled below 23 °C, the humidity in the heating and constant temperature section is (93±3)%RH, and the cooling stage is ≥ 80%RH; d) 3.2 mode operation for 50min (voltage 9V), 2.1 mode operation for 50min, and so on until the end; e) Handling of trial interruptions: If there is an interruption, the experiment is continued from the beginning of the cycle.

Performance requirements: After the test, the function of the sample should meet the requirements of performance level A, and meet the requirements of 4.2 (appearance requirements), 4.4 (functional test), 4.9.1 (gear conversion), and the insulation resistance should be ≥ 1MΩ.

High and low temperature damp heat test chamber

Steering wheel switch group test

7#-9#

Steering wheel switch group

Corrosion resistance - mist test

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The test shall be carried out in accordance with the test method 4.7.1 in Q/BYDQ-A1901.707.4, and the sample shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Working mode: installation position: non-sealed parts with vents, test time: working test, program A 2h, working mode 3.2 b) Monitoring: key parameters of parts must be continuously monitored during power-on; Test procedure: including work test and material degradation test, the mass fraction of spray solution is (5±1)% Nacl solution, PH value is 6.5~7.2, other parameter requirements during salt spray spraying and test process operation GB/T 10125 "Artificial Atmosphere Corrosion Test". c) Work test: This test is used to check the attenuation degree of the electrical function of the parts in the salt spray environment. The test procedure is shown in Figure 25, the salt spray sedimentation rate during the salt spray injection is (1~2)mL/80cm²·h, and the parts must be taken out or the top cover of the salt spray box must be opened during the non-salt spray spray, so that it can be exposed to room temperature for natural cooling and drying.

Material degradation test: according to the corresponding procedure shown in Figure 26. The sedimentation rate of salt spray is (1~2) mL/80cm²·h, and the parts must be taken out or the top cover of the salt spray box must be opened during the non-salt spray spray, so that it can be exposed to room temperature for natural cooling and drying.

Note: When the parts are placed at room temperature for natural cooling and drying for more than 2 hours, the temperature and humidity of the environment should be recorded regularly.

Final inspection: At the end of all tests, wash with running water or wipe off any remaining salting on the surface of the part with a damp cloth. Avoid water entering the inside of the parts when cleaning and wiping. All detected phenomena, including pictures, should be recorded. The appearance of the parts is checked first, and then the function is tested. If necessary, the parts can be disassembled and the internal components can be examined in detail.

Performance requirements: After the test, the sample meets the requirements of 4.4 (functional test) and 4.9.1 (gear conversion) of this standard. There should be no salt water entering or crystallizing salts inside the part. The corrosion level of the sample is required: a maximum of slight loss of light or very slight corrosion products is allowed, and the corrosion defect area is <5%.

Composite salt spray testing machine

Steering wheel switch group test

10#-12#

Steering wheel switch group

Dust tightness

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

The specimen is carried out in accordance with the requirements of 4.8.2 in Q/BYDQ-A1901.707.4. The specimen shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Work category: working mode 1.2;b) Test implementation: the protection level of the product is IP5K, and the parameters are according to Table 24; c) Shell - the pressure inside the shell of the product is equal to the atmospheric pressure; d) During the test, each connector should be connected, and the blocking part should be protected; The medium needs to be able to land freely on the test surface of the product; e) The test dust is talcum powder; f) Test temperature: room temperature; The product temperature is the ambient temperature. g) After the test, wipe the dust on the surface of the product with a brush or a clean cotton cloth for visual inspection.

Performance requirements: After the test, the function of the specimen should meet the requirements of performance level A, and meet the requirements of 4.4 (functional test) and 4.9.1 (gear conversion).

Programmable constant temperature and humidity chamber

Steering wheel switch group test

10#-12#

Steering wheel switch group

Water tightness

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch 4.7

Samples are carried out in accordance with the requirements of 4.8.3 in Q/BYDQ-A1901.707.4. The specimen shall meet the relevant requirements of Table 8 in 4.7 of this standard. a) Work category: working mode 1.2;b) Test implementation: the protection level of the product is IP2, and the parameters are shown in Table 25; c) Water temperature: 20°C±5°C; d) The temperature of the product during the test is the ambient temperature TRT

Performance requirements: The functional test after the test should be completed within 10min after the end of the test. After the test, the specimen function should meet the requirements of performance class A.

Programmable constant temperature and humidity chamber

Steering wheel switch group test

13#-15#

Steering wheel switch group

Gear conversion force (moment)

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical conditions for passenger car steering wheel assembly Part 2: steering wheel switch 4.9.2

1) Gear changeover

Operate the keys at the lowest (-40±2°C), room temperature (23±5°C) and maximum (85±2°C) operating temperatures. It is required that the key gear should be converted flexibly, the positioning is accurate and reliable, there is no loosening and blocking, and the switch with an automatic return mechanism should be able to automatically and accurately return when the external force is eliminated.

2) Gear conversion force (moment)

At room temperature, the switch is fixed on a triaxial load test bench. The measuring force (moment) is applied in the direction of gear conversion, the test direction is the direction of button movement, and the effective data of the same product is measured 5 times in a row, the maximum value and the minimum value are removed, and the average value of the remaining 3 measured values is taken as the result.

Performance requirements: The gear conversion force should meet 4.0N±1N.

Triaxial load test bench

Steering wheel switch group test

13#-15#

Steering wheel switch group

Endurance test

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical conditions for passenger car steering wheel assembly Part 2: steering wheel switch 4.11

a) Apply (14±0.5) V and normal working current to the switch, and install the switch on the key durability test bench for testing. It is required to complete the specified number of work at the rate of 5~30 times per minute at the rate of full conversion per minute;

b) If the product design and development requirements stipulate that interruptions are allowed during the test, the time of each interruption shall be less than 1 h, and the continuous working time shall be greater than 4 h.

c) For short-time working switches (such as normal working current exceeding 2A), forced ventilation can be used for cooling.

b) During the test, the backlight of the switch should be kept on; For the indicator light controlled by the switch under test, it should be turned on according to the actual vehicle status during the test. For the indicator light that is not controlled by the switch under test, it should work according to the actual vehicle state (solid on or flashing).

Performance requirements: During and after the test, the durable working times of the steering wheel switch should not be less than 50,000 times (short-time working system). During the test, the switch should be able to work properly. After the test, the switch should not be burned, deformed or other abnormal phenomena, and the gear conversion force should be in line with 4.0N±1N.

Endurance test bench

Steering wheel switch group test

16#-18#

Steering wheel switch group

Mechanical pressure

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical conditions for passenger car steering wheel assembly Part 2: steering wheel switch 4.6

The test is carried out according to method A of 4.4.2.1 in Q/BYDQ-A1901.707.3, as follows:

Working Category: Working Mode 1.1, Simulated Elbow Load: 110N, Stress Surface Diameter: ≥13.0mm (The load is applied to the surface of the product bracket, any position with a diameter greater than 13mm that can cause maximum damage, and the recommended position is near the screw mounting hole/column of the bracket.) Withstand voltage time: 1.0s, after the test, the sample should not cause large deformation and rupture of the sample shell, damage to the circuit board and its components, or interruption of electrical connection, and meet the requirements of 4.4 (functional test) and 4.9.1 (gear conversion).

Withstand voltage test bench

Steering wheel switch group test

16#-18#

Steering wheel switch group

Connector performance

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical conditions for passenger car steering wheel assembly Part 2: steering wheel switch 4.12

The connector is only for the performance of the 4PIN connector of the steering wheel, and the insertion force and holding force are used at a constant speed of no more than 50mm/min. The test target requires: the force of the wire harness termination connector inserting into the sheath ≤ 30N, and the holding force of the wire harness termination connector in the sheath ≥ 40N.

Other connector requirements: subject to the requirements of the drawings

Digital push-pull force gauge

Steering wheel switch group test

16#-18#

Steering wheel switch group

Strength test

Q/BYDQ-A1906.6242.2—2020 General technical specifications for passenger car steering wheel assembly Part 2: steering wheel switch

Q/BYDQ-A1906.6242.2—2020 General technical conditions for passenger car steering wheel assembly Part 2: steering wheel switch 4.6

Apply a force of 98N to the key along the direction of the force during the normal operation of the switch, so that the switch key moves to the limit position for 1min, and the deformation of the key and the damage to the internal structure shall not occur.

Triaxial load test bench

Decorative parts & switch group paint film test

1#-3#

chromatic aberration

Q/BYDQ-A1906.4119—2017

The size of the sample is greater than 120mmX50mm, and the neutral distance of the observer's dress is greater than 30cm and less than 50cm. The angle between the surface of the test plate and the line of sight is about 10°, except for the test plate, there should be no other colored objects in the field of view, and the standard color plate is visually color-compared with the standard color plate under the light conditions of uniform illumination and illumination of not less than 2000lx. In controversial cases, a colorimeter can be used to make a test decision.

1) Subjective evaluation first, refer to GB/T250 to evaluate the gray sample card for color change, use the standard gray sample card and the original sample for comparison, and require 4-5 grades;

2) When there is a dispute over the visual results, the test results of the colorimeter shall prevail: △E≤0.8;

3) When applicable, refer to the sample for comparison

Colorimeter

Decorative parts & switch group paint film test

1#-3#

hardness

Q/BYDQ-A1906.4119—2017

a) Test equipment: Japan Mitsubishi test pencil;

b) The pencil core is about 3mm exposed in a smooth cylindrical shape, and grind until the tip of the pencil is flat and the edge is sharp. Fix the test pencil on the pencil clamp so that the coating surface touches the tip of the pencil and jacks up a little, so that the nib is 45 degrees to the paint surface;

c) Add a 750g weight above the fixture, the scratch length is 5mm, find an origin point on the surface of the sample to be measured, draw once at each of the 5 different radial positions centered on it, and check the traces after wiping with an eraser.

Appearance: no plastic deformation (permanent indentation on the surface of the paint film, but no cohesive failure) and cohesive failure (visible abrasions or scratches on the surface of the paint film);

PVD non-conductive vacuum plating hardness 1H pencil

PU spray hardness HB pencil.

Water plating hardness 1H pencil

Vickers hardness tester

Decorative parts & switch group paint film test

1#-3#

Paper tape is wear-resistant

Q/BYDQ-A1906.4119—2017

A load of 175g was applied with a dedicated NORMANRCA Abrasion Tester (Model: 7-IBB-647) or a special paper tape (11/16 inchwide×6 or 8 inchdiameter) of the RCA7-1BB model to drive the paper tape to rub against the surface of the sample.

PU paint 150 times without primer/substrate.

PVD or electroplating 300 times without primer/substrate

RCA Paper Tape Abrasion Tester

Decorative parts & switch group paint film test

4#-6#

Resistant to damp heat

Q/BYDQ-A1906.4119—2017

The sample was placed in a temperature and humidity control test chamber with a temperature of (47±1) °C and a relative humidity of (96±2)%, and the continuous test was checked once every 48 hours, and after two inspections, it was checked every 72 hours, and the test time was 168 hours.

The results were based on 2 pieces of the same grade in the 3 trim plates≤ 2 (slight cracks, bubbles, wrinkles, and falling off phenomena are allowed) were compared with the samples before the experiment, and the discoloration grade was ≥ 3.5;

High and low temperature damp heat test chamber

Decorative parts & switch group paint film test

4#-6#

Temperature changes

Q/BYDQ-A1906.4119—2017

Keep it at high temperature (85±2) °C for 8h, cool it at room temperature for 0.5h, keep it at low temperature (-40±2) °C for 8h, and cool it at room temperature for 0.5h, for a cycle. Test for 6 cycles in a row.

After the test, the sample is restored at room temperature for 2 hours after the appearance inspection, no cracks, blistering, wrinkles, falling off and other undesirable phenomena, with the sample before the test, the discoloration grade ≥ 3.5, the 100-grid adhesion test meets the requirements of 4B, or the adhesion of cross scratches meets the requirements of 5B.

High and low temperature alternating test chamber (rapid temperature change)

Decorative parts & switch group paint film test

4#-6#

Thermal shock

Q/BYDQ-A1906.4119—2017

Keep it at high temperature (85±2) °C for 1h, and put it at low temperature (-40±2) °C for 1h within 30S after taking it out, for a cycle. Test for 6 cycles in a row.

High and low temperature alternating test chamber (rapid temperature change)

Decorative parts & switch group paint film test

7#-9#

Alcohol resistance

Q/BYDQ-A1906.4119—2017

Use a cotton cloth (special) dipped in anhydrous alcohol (concentration≥99.5%);

a) Wrapped on a dedicated test head (the area of the test head is about 1cm after wrapping with cotton cloth;

b) Apply a load of 200g and wipe back and forth on the surface of the sample with a special instrument or manually at a rate of 40 times/min ~ 60 times/min for a certain cycle.

After the test is completed, the surface of the paint coating is qualified when there is no fading and the bottom is transparent (exposing the substrate); Compared with the samples before the experiment, the color change grade ≥ 3.5.

PVD non-conductive vacuum plating 300 cycles

Metallic paint 300 cycles

PU paint does 100 cycles.

Decorative parts & switch group paint film test

10#-12#

Water resistance

Q/BYDQ-A1906.4119—2017

a) Before the test, the experimenter shall observe the sample in strict accordance with the requirements of the laboratory appearance inspection, and record the surface defects of the sample before the test in detail (take pictures if necessary);

b) Open the lid of the box, inject an appropriate amount of deionized water into the tank, the water temperature is set to 40 °C, and maintain the temperature during the whole test, after the water temperature is stable, the experimenter wears gloves to submerge the sample vertically into the water, and finally closes the box cover, during the placement of the sample, ensure that the sample is at least 30mm between the sample and the sample, and the interval between the test and the bottom of the tank, the tank wall and the heating device is at least 50mm, and the test time is 16h; After the test, the specimen is required to be placed for 1 hour at a temperature of 23°C±2°C and a relative humidity of 50% ±5%.

After the test, the surface of the sample is required to be free of wrinkles, swelling, rust and other phenomena, and the blistering grade is ≥8F.

Decorative parts & switch group paint film test

10#-12#

CASS Salt Spray (Plating Parts)

Q/BYDQ-A1906.4119—2017

GB/T10125—2012

a. 24H is suitable for automotive interior parts, such as air conditioning audio knobs, etc. (Suitable for plating parts based on plastic)

Reach level 9 sprite

Composite salt spray testing machine

Decorative parts & switch group paint film test

13#-15#

Xenon lamp aging

Q/BYDQ-A1906.4119—2017

According to the standard of in-vehicle electrical components:

1. Filter: window glass filter;

2. Monitoring point: 420nm

3. Irradiance: (1.20±0.02) W/㎡

4. Test steps: 1) Illumination stage: 89 °C± 3 °C blackboard temperature, 62 °C±2 °C box air temperature, 50% ±5% relative humidity, running time 228 minutes; 2) Blackboard temperature of 38°C±3°C in the dark stage, box air temperature of 38°C±3°C, relative humidity of 95%±5%, running time of 60 minutes

A total of 105 cycles were performed.

Note: The electroplating parts do not do xenon lamp aging test, but vacuum plating must be done.

After the test, there should be no dialysate precipitation (sticky), wrinkling, warping and deformation, etc., and it is required to reach grade 2.

Xenon lamp aging test chamber

Decorative parts & switch group paint film test

16#-18#

adhesion

Q/BYDQ-A1906.4119—2017

100 Grid Method:

(1) Test equipment requirements: cutting tools--- sharp razors, scalpels, 100 grid knives or other single-edged or multi-edged knives with an angle of 15-30 cutting edges, and the cutting edge requires the cutting line width to be ≤0.2mm---; 3M600 adhesive tape, storage period within half a year; 99% industrial alcohol; Microscope or magnifying glass.

(2) Sample test area: The sample area should be greater than 150mm*100mm as much as possible (try to find an area large enough for testing).

(3) Test steps:

A) Select a flawless, non-reflective place, and cut parallel lines under a lighted magnifying glass as follows;

B) The cutting cutter is guided transversely by the guide tool, and the steel ruler should be in the transverse uncut area, evenly draw 11 lines, the line length is 15mm, and the area is insufficient to draw to the maximum range. The distance between the lines is 1±0.3mm. The depth is to scratch the primer and touch the plastic material.

C) Brush the surface with a brush or cotton yarn to remove the peeling chips or ribbon paint film of the paint layer. After cutting, use a white cloth dipped in a little 99% industrial alcohol and wipe the paint surface in the same direction twice to dry to remove the powder, tendons, and grease that have fallen off.

D) Check the incision through the reflection of the substrate, if the cutting line is not deep to the substrate, then re-cut the grid according to the above steps at another selected part.

E) Prepare the tape for the test, glue the tape to the grid and cover it completely, press the tape with a pencil eraser tip to flat, make sure that the tape is well bonded to the paint layer, and observe whether the tape is well bonded.

F) After the tape is applied for 30S-90S, hold the unglued end of the tape with your hand and quickly tear off the tape within 1s at an angle of 60-90 degrees.

G) Check the extent to which the grid is detached from the bottom layer in the area of the grid or use a magnifying glass with light, and microscopy is recommended.

H) Adhesion grade judgment, adhesion grade as shown in the table on the right.

For products with printed words or patterns (silk screen printing, pad printing, stenciling) on the surface or products with special shapes, when it is necessary to test the adhesion with physical objects, the cross scratch test can be used.

Cross scratch method: single-edged knife manual cross grid, the angle is about 60°, the scratch needs to be cut through to the sample substrate, the size is 10mm*10mm, to ensure that the 3M600 adhesive tape is in good contact with the coating, after the tape is pasted for 30S-90S, hold the unglued end of the tape with your hand, and quickly tear off the tape within 1s in a 60-90 degree direction.

Using the 100-grid method, the PU spraying grid specification is 1mm*1mm, and the PVD non-conductive vacuum plating grid specification is 2mm*2mm, which is required to reach 4B level (it is allowed to have a slight detachment in the tangential intersection area after the test, and the shedding surface is slightly less than 5% of the scratching area).

Hundred grid knives

Decorative parts & switch group paint film test

19#-21#

Boiling test

Q/BYDQ-A1906.4119—2017

(1) Samples are boiled in hot water at 80°C for 10 minutes;

(2) Use protective gear to ensure that the sample does not touch the wall of the hot water dissolver;

(3) Dry with a dust-free cloth and return to room temperature for at least 1h to check the appearance

1) The surface coating does not change color, peels, paint cracks, blistering and other phenomena, and the blistering grade ≥ 8F. The test reference is shown in Appendix A.

2) After the test, the sample is recovered at room temperature for 2 hours and then the appearance inspection is carried out, and the adhesion test of 100 grids meets the requirements of 4B, or the adhesion of cross scratches meets the requirements of 5B.

Thermostatic sink

Decorative parts & switch group paint film test

22#-24#

ROD pen resistant to scratches and scratches

Q/BYDQ-A1906.4119—2017

Clean the nib with acetone with an ErichsenmodelROD pen and 1 time every 10 scratches to fix the test sample.

Set the needle tip to be perpendicular to the test sample and press down on the ROD pen so that the end of the pen is in contact with the surface of the sample, keep the ROD pen perpendicular and move in a straight direction by at least 10mm with constant force, and the test time is 1 second. Draw 3 parallel lines.

Visually observe the test surface. The opening of the underline

The beginning part is allowed to have scratches on the paint film, apply

Add 10N, the test surface is required to have no exposed substrate, no coating separation, and scratches are allowed.

ROD pen

Decorative parts & switch group paint film test

25#-27#

Infection test

Q/BYDQ-A1906.4119—2017

With 200g of force, draw two 20mm straight lines with a paint pen. Then put it in 50°C 95% humidity for 1h, and return to room temperature for 1h.

Note: 1. There is no restriction on the brand of oil-based pen, only black is required; 2. For products with skin lines, the test can be done on a smooth plate.

Use alcohol to add 1Kg of force to rub 15 times back and forth, there should be no bleeding.

spectrophotometer

Decorative parts & switch group paint film test

25#-27#

Low temperature storage test

Q/BYDQ-A1906.4119—2017

The samples were not packed, placed in a temperature chamber, and continued for 48h after the temperature stabilized to (-40±3°C); After the end of the test, the test sample will be restored at room temperature for 2 hours, and then the appearance inspection and 100 grid adhesion test will be carried out

There are no abnormalities such as cracks, blistering, paint peeling off in the appearance of the sample, and the adhesion test of 100 grids reaches 4B; or cross scratch adhesion up to 4B requirements.

High and low temperature damp heat test chamber

Hundred grid knives

Decorative parts & switch group paint film test

25#-27#

High temperature storage test

Q/BYDQ-A1906.4119—2017

The sample is not packaged, put into the temperature box, the experimental sample is stored under high temperature conditions of (95 °C±3 °C) for 48 hours, and after the normal temperature is restored for 2 hours, the appearance of the sample has no cracks, blistering, paint peeling and other abnormalities, and the adhesion test of 100 grids reaches 4B.

There are no abnormalities such as cracks, blistering, paint peeling and other abnormalities in the appearance of the sample, and the adhesion test of 100 grids reaches 4B. or cross scratch adhesion up to 4B requirements. Compared with the pre-test samples, the discoloration grade ≥ 3.5.

High and low temperature damp heat test chamber

Hundred grid knives

Decorative parts & switch group paint film test

28#-51#

Resistant to chemical experiments

Q/BYDQ-A1906.4119—2017

(1) Place the samples in an incubator at 40 °C for 1 hour.

(2) Take out the sample, cover the pollutant on the sample surface in the form of Table 1 (if the visible exposure area of the part is greater than 400cm2, the test area is 400cm2), and then leave it at room temperature for 1 hour.

(3) Re-place the sample in an incubator at 40°C for 1 hour, then raise the temperature to 70°C within 30 minutes, then keep it at this temperature for 4 hours, and then reduce the temperature to 40°C within 30 minutes.

(4) Repeat steps (2) and (3) with the same reagent, but change 4H to 12H, i.e., hold at 70 °C for 12H.

(5) Repeat steps (1), (2), (3), and (4) with another reagent until the reagents required in Table 1 are completed, and each component is required to perform up to 3 reagent tests.

(6) Clean the polluted area with cleaning agent, first use household detergent, and if you can't clean it weakly, you should use multi-functional foam detergent to clean it.

(7) After cleaning, use filter paper to blot the remaining detergent stains on the surface of the sample, and then conduct visual inspection to judge the discoloration grade.

(8) Adhesion test is required after the test.

3pcs samples of reagents per group. A total of 8 groups of reagents.

After the test, the sample is restored at room temperature for 2 hours and then the appearance inspection is carried out (refer to Q/BYDQ-A1901.406), the impression phenomenon is allowed, the appearance grade is ≥3, the peeling and paint cracking phenomenon are not allowed, and the 100-grid adhesion test meets the requirements of 4B. or cross scratch adhesion up to 5B requirements.

Note: Light gray spots that can be erased with flannel are allowed, and slight darkening is allowed for the low purity gold alloy overlay, but rust and salting out are not allowed.

Programmable constant temperature and humidity chamber