Auto parts are an indispensable part of the car, and manufacturers pay more attention to their air tightness.Products in the field of auto parts require special air-tightness treatment. The country has special grade requirements for testing in the field of auto parts. Different products have different testing methods.Hirays Technology has also conducted in-depth research on the sealing testing of auto parts, and customized equipment according to different testing needs, and has achieved good results.

Sealing tester for auto parts and die castings

This time we will analyze the sealing testing of auto parts and die-casting parts. We hope it will be helpful to everyone.

1. Analysis of Difficulties in Inspection of Auto Parts and Die Castings

1. The overall shape of the auto parts is irregular, with a concave center and a round shape. There are three contact pieces inside, and a connector below, which is an irregular long column. The three contact blocks below are used to connect components in other parts of the car;

auto parts

2. The shape of the automotive die-casting parts is polygonal and made of external waterproof shell material. There is a docking port extending from the front below, and the overall permeability is strong;

Automotive die castings

3. Use high-density shell materials for casting. The irregular shape makes the sealing test more inconvenient and requires the use of molds to assist;

4. When testing, you need to consider its non-destructiveness, select corresponding tooling and molds, and pay attention to its calculation methods, pressure, and software algorithms;

2. Demonstration of the sealing testing process of auto parts and die castings

1. The two products tested this time have different shapes, and the mold tooling used is also different; but they all need to use molds. First, the mold prepared for the auto parts is cast according to the shape of the parts. Put the parts into the mold, close to the inner wall of the mold, and leave a hole on the right to place the docking column under the parts. During the inspection, the upper and lower molds are closed as a whole, and the right detection instrument blocks the docking port, which is more conducive to the inspection;

Detailed display of sealing test of auto parts

2. The shape of automobile die-casting parts is special. The polygonal shape and its overall high permeability make the mold customized for it mostly cast according to its overall shape. After turning the bottom docking port to the right and putting it into the mold, the whole die-casting part is tightly stuck with the inner wall of the mold. During inspection, the upper and lower molds are closed, and the right tool is stuck on the docking port. The degree of sealing is high, which is conducive to the accuracy of the inspection;

Detailed display of sealing test of automotive die castings

3. Before starting the test, set the parameters on the instrument. After pressing the start button, the instrument will fill the mold with dry and impurity-free gas, then cut off the compressed air supply, wait for a period of time to stabilize the pressure, and monitor the slight changes in air pressure in the test environment after a set measurement time.The sensor transmits this information to the detection system, and finally through a series of calculations, the leakage value of the gas can be obtained, and its air tightness value can be detected based on the leakage value;

Sealing testing tooling for auto parts and die castings

4. If the product to be tested is not sealed 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 auto parts and die castings are leaking, and the instrument test results will also show NG, which means the air tightness test failed.If the tested auto parts and die castings do not leak, the gas in the mold will be in a constant state after inflation, and the pressure value and leakage value displayed on the instrument will also be stable. The instrument test result will display OK, indicating that the sealing test has passed.

3. Parameter table of air tightness tester for auto parts and die castings

The copyright belongs to Hirays Technology. Reprinting and counterfeit originality are prohibited. Any violation will be at your own risk.