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Airtightness test case demonstration of die casting parts by Harris Technology

The most difficult problem to solve in the defects of die casting parts is that the sealing is not in place, which leads to the leakage problems such as oil leakage, air leakage and water leakage. In order to meet the use standard, manufacturers need to carry out strict air tightness test on die castings. Among them, as a domestic air tightness tester production expert, Harris technology has developed a high-precision air tightness testing equipment for die castings, which has been adopted by Zhengyao New Energy Technology Co., Ltd. Next, let's learn about the air tightness tester for die castings.

1Test principle

The air tightness tester for die castings of Harris technology uses compressed air as the detection medium to directly inflate the die castings. The direct inflation method is used to inflate the die castings. The pressure sensor inside the instrument is used to monitor the products. After the inflation, the pressure change displayed by the instrument is used to determine whether the die castings leak.


Schematic diagram of airtightness test principle for die casting parts of Harris Technology


Interface of hermetic tester for die casting

2Die casting air tightness tester3da design chart


Tooling of hermetic tester for die castings3dDesign drawings(1


Tooling of hermetic tester for die castings3dDesign drawings(2

3Practical operation of air tightness test for die casting parts

Before the test, Harris technology put the die casting into the tooling and connected it with our instrument. There is a valve island, gas tank and other parts inside the instrument and the program we set. After the connection, when testing the die casting, press the start button.

During the inspection, the instrument will inflate the die casting. If the die casting is not sealed, there will be gas leakage, and the gas will leak to the other end. At this time, the leakage value data in the instrument will be larger and larger, and the pressure value will drop. At this time, it can determine whether the die casting has air leakage, and the instrument test results will also show the air leakageNGIt means that the air tightness test fails. If there is no air leakage in the tested die casting, the gas will be in a constant state after inflation, the pressure value and leakage value displayed on the instrument are also stable, and the test result of the instrument is displayedOKThe words indicate that the die casting has passed the air tightness test.

4Display of finished products of die casting air tightness tester


Product drawing of hermetic tester for die casting parts


Actual shooting of tooling details of hermetic tester for die casting parts


Actual shooting of die casting air tightness detector tooling of Harris Technology

5Brief introduction of air tightness testing function of die casting parts

1The waterproof tester can support leakage test, blocking test, positive pressure test, negative pressure test and other leakage test methods. The test range is wide, and users can choose according to their own test needs.

2Large size touch screen is used as the human-machine interface, which can easily monitor the test results and set various parameters in the process of waterproof test.

3It has the alarm function of qualified and unqualified products, which can eliminate the possibility of manual misjudgment and misinspection.

4, band4Circuit switch input and output8It can accept the control of external sensors and switch buttons, and can control the external relay, solenoid valve and other executive components, so as to realize the full automation of the test conveniently.

5Waterproof testertwo hundredBy setting the parameters of the subprogram on the touch screen, the user can connect different subprograms in series to form a test processI/OThe interface enables the leakage meter to receive control signals from external sensors and control external actuators (relays, solenoid valves, etc.). So as to realize the automation of the test process.

6, with test data recording function, you can download test data toUDisk, and through the computer display.

7With bar code scanning function, it can track and record defective products and repair situation; The function of upper computer.

The above contents and pictures are original by Harris technology, and can not be reproduced or copied without authorization.

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