The car turn signal serves as an important indicator light to remind the vehicles and pedestrians in front and behind to pay attention.It mainly uses xenon lamp tubes, single-chip microcomputer control circuits, and works continuously by rotating left and right strobes.In order to ensure that it can be used normally while the vehicle is driving, when inspecting the quality of the car's turn signal, the manufacturer will conduct an air tightness test for each combination of accessories of the turn signal.If the airtight seal of the turn signal is not in place, water vapor will enter the interior of the turn signal, making it impossible to use normally, resulting in the car being unable to convey indication signals while driving, and easily causing dangerous accidents.

Hirays Technology has broken through many problems in air tightness testing technology in the automotive field. It has more than 10 years of testing experience in the field of automotive air tightness testing. This time, Hirays Technology shared the following technical experience with the industry regarding the air tightness test case of semi-finished automobile turn signal lights.

Case study of semi-finished automobile turn signal lamp to be tested for air tightness

Automotive turn signal air tightness testing solution display (instrument + single station tooling)

1. The appearance of the semi-finished automobile turn signal lamp is shown with the detection difficulties

1. The semi-finished automobile turn signal signal inspected by Hirays Technology this time is a curved cuboid, and the whole is composed of a precise waterproof structure. To ensure its normal use, the customer used waterproof materials to wrap it, and there are two wires at the rear to connect the power supply.

2. Due to the particularity of automobile turn signals, non-destructive testing is also required during inspection.According to the product analysis, the product is suitable for indirect testing, so fixing the mold wire of the semi-finished turn signal lamp during testing is also a major difficulty.

2. Breakthrough in the difficult air tightness detection of automobile turn signals

1. The semi-finished car turn signal lamp has a special shape and high precision, so Hirays Technology customized a special mold for it. The groove inside the mold is customized according to the length, width and height of the car turn signal lamp. There are two grooves at the front end of the mold specifically for placing two wires.When starting the inspection, put the car turn signal into the tooling mold. When the upper and lower molds are closed again, a closed environment will be formed;

Automotive turn signal air tightness testing mold details

The automobile turn signal air tightness testing product is placed into the mold

2. This kind of detection method is more conducive to the indirect detection of automobile turn signals. The mold can also protect the automobile turn signals from damage during detection, achieve non-destructive testing and reduce corporate costs.

Air tightness test wire test display for automobile turn signals

3. When the tooling connected to the mold is started, a certain volume of gas is injected into the mold through the air source. When the detected air pressure is reached, the air supply is automatically cut off and the pressure stabilization stage is entered. The Hirays Technology air tightness detection system will monitor the air pressure in the mold.The instrument will automatically determine whether the turn signal is sealed based on the amount of leakage. If the turn signal is sealed, the instrument will display OK. If it is leaking, the instrument will display an alarm signal and display NG.

3. Characteristics and parameter table of automobile turn signal air tightness detector

1. High-sensitivity pressure sensing and adjustment unit, combined with advanced differential pressure software algorithm, the minimum resolution can reach 0.1Pa. This algorithm has obtained a national patent.

2. Patented technology independently developed by Hirays."IVT pneumatic sealing valve island", greatly improving the test accuracy, ensuring the stability of the instrument, and the inflation speed is also greatly improved.

3. Multiple test functions: The instrument integrates two pressure forms, positive and negative, and 8 test methods: two pressure forms and five test methods can be programmed into more than 20 test functions.

4. It has more than 200 groups of subroutines. Each group of subroutines can be programmed independently, single selected and combined to meet various complex testing requirements.

5. Full-touch large-screen intelligent operating system, graphical UI design based on the detection process, the operation interface is simple and clear, easy to teach and learn.

6. A variety of pressure adjustment components and ranges are optional, with a wide air pressure range (-80KPA&-1MPa) optional.The optional electronic pressure regulating valve can realize multiple sets of pressure sequential tests.

7. Multiple communication interfaces: built-in RS232 serial port, RJ45 network port, USB communication interface, LTP external I/O control port, supporting multiple communication protocols.

8. Optional barcode scanning function and printer are available to facilitate product data management and quality traceability. The instrument history record can reach up to 200,000 items and can be exported to the computer in batches.

9. The standard volume identification function can automatically identify the volume of the sample to be tested, and measure and judge the leakage rate in a volumetric manner.

10. Ultra-high stability and ease of use have passed the rigorous test of the market.

11. A variety of accessories are available, including inflatable bypass, quick connector, and standard leak hole. At the same time, the instrument supports third-party calibration and can issue a calibration report.

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