Key points for daily maintenance and calibration of the charging gun plug-in life solution immersion testing machine

　　Charging gun plug-in life solution immersion testing machineIt is a key equipment for evaluating the comprehensive durability of new energy vehicle charging connectors under complex environmental conditions, integrating mechanical plugging, chemical corrosion, and environmental simulation. Its operational stability directly affects the accuracy of test data and product reliability evaluation. To ensure the long-term efficient and precise operation of the equipment, it is necessary to establish a scientific daily maintenance system and conduct regular professional calibration.

1、 Key points of daily maintenance

1. Cleaning and maintenance: After each test, the corrosive medium (such as salt water, acidic and alkaline solution, etc.) in the solution tank should be drained in a timely manner, the inner cavity should be rinsed with deionized water, and residual water stains should be wiped dry to prevent crystallization or corrosion residue accumulation. For moving parts such as fixtures, guide rails, and screws, dirt should be regularly removed and lubricating grease should be applied to ensure smooth insertion and removal.

2. Check the sealing system: Focus on checking whether the sealing ring, pipeline joints, and protective cover of the solution tank are aging or damaged, to avoid liquid leakage damaging electrical components or causing safety hazards.

3. Air and circuit inspection: If the equipment is equipped with a pneumatic drive system, it is necessary to regularly drain and discharge water, and check whether the air pipe is cracked; At the same time, check whether the sensor circuit and motor wiring terminals are loose to ensure stable signal transmission.

4. Replacement of vulnerable parts: The guide sleeve, positioning pin, spring and other components in the insertion and extraction mechanism are prone to wear due to frequent movements. A replacement cycle should be established to avoid testing errors caused by mechanical deviations.

2、 Calibration points

1. Insertion and extraction force calibration: Use a standard force measuring instrument to calibrate the push-pull force applied to the insertion and extraction mechanism, ensuring that it meets the set value (such as 100N ± 5%), to prevent overload damage to the tested charging gun or insufficient force affecting the authenticity of the test.

2. Displacement and stroke calibration: Verify the insertion and extraction stroke accuracy through laser displacement sensors or micrometers to ensure consistent insertion and extraction depth each time, usually requiring an error of ≤± 0.5mm.

3. Calibration of the counting system: Verify the accuracy of the plug and unplug count counter, which can manually perform a fixed number of plug and unplug operations and compare the displayed values to ensure the reliability of the lifespan test data.

4. Temperature control system calibration: If the solution tank has heating function, a standard temperature probe should be used to calibrate the temperature control accuracy, ensuring that the deviation between the set temperature and the actual liquid temperature is within ± 2 ℃.

5. Time control calibration: Verify the accuracy of time parameters such as insertion and extraction frequency, soaking cycle, etc., to ensure that the test rhythm meets the standard requirements.

It is recommended to have a comprehensive calibration conducted by a professional metrology institution or manufacturer's technical personnel every 6 months, and a calibration report should be issued and included in the equipment management file.

In summary, through standardized daily maintenance and regular calibration, it is possible to effectively extendCharging gun plug-in life solution immersion testing machineThe service life ensures the scientific validity of test results and provides solid support for improving the quality of charging connectors.