As the most important chip in the car's electrical system, the car CPU is responsible for controlling the engine's ignition time, the amount of fuel injection, fuel level indication, water temperature, automatic temperature adjustment of the car's air conditioner, password detection of electronic door locks and alarms for various security systems, etc. As the core of the car's operating system, its sealing is very important.As a solution provider for sealing testing, Hirays Technology focuses on providing professional solutions in the field of sealing.Today we will share a case about the sealing test of automobile CPU, hoping it will be helpful to everyone.

(Automotive CPU sealing tester)

1. Analysis of Difficulties in Automotive CPU Sealing Testing

The automotive CPU that needs to be tested for sealing this time has an irregular shape and a high overall precision. There are protruding interfaces on the front and rear sides, and the internal components are relatively complex. Its complex internal structure needs to be taken into consideration during testing. The testing risk is high and the cost is high. The above problems need to be overcome during testing.

Automotive CPU

2. Breakthrough in the difficulty of sealing detection of automotive CPUs

1. We use indirect detection for this inspection, which requires the assistance of specially customized molds. The mold customized by Hirays Technology is completely cast according to the shape of the automobile CPU. During inspection, the automobile CPU can be placed in the mold, which makes it easier to close the mold to form a sealed inspection space;

(Details of sealing test of automobile CPU)

2. The instrument for sealing testing of automobile CPU uses compressed gas as the medium. When the air enters the inside of the mold, it will slowly reach the pressure value set by the instrument. Even if the internal gas leaks, it will not affect the internal components, which can reduce the cost of enterprise testing and make the testing results more accurate, providing the best environment for testing;

3. When the gas inside the mold reaches the pressure value set by the instrument, the instrument will automatically cut off the gas supply. At this time, we can see the gas leakage inside the mold displayed on the instrument, and use this value to determine whether the sealing of the automobile CPU reaches the sealing level;

(Tightness testing tool for automobile CPU)

4. If the sealing of the automobile CPU is not good and air leakage occurs, the leakage value displayed in the instrument will become larger and larger, and the pressure value will decrease at the same time.At this time, it can be determined whether the car CPU is leaking air, and the instrument test result will also show NG, which means the air tightness test failed.If the tested automobile CPU does not leak, the gas in the tooling mold will be in a constant state after inflation. The pressure value and leakage value displayed on the instrument are also stable. The instrument test result will display OK, indicating that the sealing test has passed.

3. Car CPU sealing tester parameters

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