An airtight detection sealing structure for aluminum alloy die castings

Abstract

This utility model discloses a sealing structure for airtightness testing of aluminum alloy die-castings, including a main body and an airtightness tester disposed on the outer left side of the main body. Support frames are located at the four corners of the upper side of the main body. A top plate is located on the upper side of the support frames. A hydraulic press is located at the upper center of the top plate. A hydraulic sleeve is connected to the lower side of the hydraulic press, penetrating the top plate. A pressure platform is located below the hydraulic sleeve. A pressure plate is located at the lower center of the pressure platform. An air inlet is located on the inner center of the pressure plate, connected to the airtightness tester via an external connecting pipe. When the safety airbag inflates, it fills the tiny gaps between the die-casting and the testing device, enhancing the overall sealing effect. This effectively reduces the possibility of gas leakage during testing, making the air pressure data obtained by the airtightness tester more accurate, thereby greatly improving the accuracy of the airtightness test results and ensuring accurate judgment of whether the aluminum alloy die-casting is qualified.

Description

Technical Field

[0001] This utility model belongs to the technical field of airtightness testing of die-cast parts, specifically relating to a sealing structure for airtightness testing of aluminum alloy die-cast parts. Background Technology

[0002] During the manufacturing process of aluminum alloy die-cast parts, due to material properties and process limitations, tiny pores or cracks may exist. These defects can affect their airtightness, especially in applications requiring sealing, such as automotive parts and electronic device housings. To ensure product quality and reliability, airtightness testing is an essential step. Airtightness testing typically employs pressure decay methods or helium mass spectrometry leak detection methods. This involves filling the die-cast part with gas and monitoring pressure changes or detecting gas leaks to determine its sealing performance.

[0003] Traditional airtightness testing devices lack a structure to fill the gaps between the die-casting parts and the pressure platform. This often leads to displacement and gas leakage of the die-casting parts during the pressing process due to uneven surfaces or design defects in the sealing structure, thus affecting the testing accuracy. Utility Model Content

[0004] The purpose of this utility model is to provide a sealing structure for airtightness testing of aluminum alloy die castings, so as to solve the problem that the traditional airtightness testing device lacks a structure for filling and connecting gaps between the die casting and the pressure platform. Often, due to unevenness of the die casting surface or defects in the sealing structure design, the die casting will be displaced and gas will leak during the pressure process, affecting the detection accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an airtightness testing and sealing structure for aluminum alloy die castings, comprising a device body and an airtightness testing instrument disposed on the outside of the left side of the device body;

[0006] The device body has support frames at the four corners of the upper side, a top plate at the upper side of the support frames, a hydraulic press at the upper middle of the top plate, a hydraulic sleeve rod at the lower side of the hydraulic press that passes through the top plate, a pressing platform at the lower side of the hydraulic sleeve rod, a pressure plate at the lower middle of the pressing platform, and an air supply hole at the inner middle of the pressure plate that is connected to an air tightness tester through an external connecting pipe.

[0007] A detection platform is provided on the upper middle side of the main body of the device;

[0008] The main body of the device and the airtightness detector are powered by connecting to an external power source.

[0009] A storage box is provided on the outside of the pressure plate, and a safety airbag is provided on the inside of the storage box. An air supply pipe is connected to the upper left side of the airbag through the pressure platform, and a safety air pump is provided on the upper side of the air supply pipe through the top plate.

[0010] Preferably, guide rods are provided at the four corners where the top plate connects to the main body of the device, and the pressing platform can move up and down on the guide rods.

[0011] Preferably, a start button is provided on the upper left and right sides of the front of the main body of the device, and an emergency stop button is provided on the upper middle of the front of the main body of the device.

[0012] Preferably, the airtightness tester is equipped with multiple air pressure sensors that are connected to the pressure plate respectively, and the front and rear ends of the upper side of the test platform are respectively provided with protective plates, and the external die-cast part to be tested is placed between the two protective plates of the test platform.

[0013] Preferably, the storage box is connected to the pressure platform by welding, and the storage box is located outside the pressure plate. The height of the storage box is lower than the height of the pressure plate, and the airbag has two postures: inflating and contracting.

[0014] Preferably, the safety air pump delivers or outputs gas into the airbag through an air supply pipe, and the pressure platform is connected to the hydraulic sleeve by bolts.

[0015] Compared with the prior art, this utility model provides a sealing structure for airtightness testing of aluminum alloy die-casting parts, which has the following advantages:

[0016] 1. When the airbag inflates, it fills the tiny gaps between the die-cast part and the testing device, enhancing the overall sealing effect. This effectively reduces the possibility of gas leakage during the testing process, making the air pressure data obtained by the airtightness tester more accurate, thereby greatly improving the accuracy of the airtightness test results and ensuring that the quality of the aluminum alloy die-cast part can be accurately determined.

[0017] 2. In extreme and dangerous situations such as the chipping of die-cast parts, the flexible material of the airbag can effectively buffer the powerful impact of the chipping, preventing fragments from flying at high speed. At the same time, the large-area enveloping shape of the airbag acts as a barrier, limiting the range of fragment ejection and preventing them from damaging other components of the testing device. More importantly, it ensures the personal safety of the operators, providing reliable safety for the entire testing process.

[0018] In addition, the airbag blocks fragments when the die-cast parts shatter, reducing the impact and damage of fragments to other components of the testing device, lowering the frequency of equipment maintenance and parts replacement, thereby extending the overall service life of the testing device, improving the durability of the equipment, and saving equipment maintenance costs for enterprises. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the device in this utility model.

[0020] Figure 2 In this utility model Figure 1 A diagram showing an upward angle.

[0021] Figure 3 In this utility model Figure 1 A schematic diagram of the structure of a Chinese airbag after it has deployed.

[0022] Figure 4 In this utility model Figure 4 A structural diagram from an upward perspective.

[0023] Figure 5 In this utility model Figure 1 A magnified structural diagram of the central circular region.

[0024] Figure 6 In this utility model Figure 4 A magnified structural diagram of the central circular region.

[0025] In the diagram: 1. Main body of the device; 2. Hydraulic press; 3. Testing platform; 4. Protective plate; 5. Start button; 6. Emergency stop button; 7. Guide rod; 8. Top plate; 9. Safety air pump; 10. Support frame; 11. Air tightness tester; 12. Lowering platform; 13. Storage box; 14. Safety airbag; 15. Air inlet; 16. Pressure plate; 17. Hydraulic sleeve; 18. Air pipe. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] This utility model provides, for example Figure 1-6 The above describes an airtightness testing and sealing structure for aluminum alloy die castings, which includes a device body 1 and an airtightness testing instrument 11 disposed on the outside of the left side of the device body 1.

[0028] Support frames 10 are provided at the four corners of the upper side of the main body 1 of the device. A top plate 8 is provided at the upper side of the support frame 10. A hydraulic press 2 is provided at the upper middle part of the top plate 8. A hydraulic sleeve 17 is connected to the lower side of the hydraulic press 2 through the top plate 8. A pressing platform 12 is provided at the lower side of the hydraulic sleeve 17. A pressure plate 16 is provided at the lower middle part of the pressing platform 12. An air supply hole 15 is provided at the inner middle part of the pressure plate 16, which is connected to the air tightness tester 11 through an external connecting pipe.

[0029] A detection platform 3 is provided on the upper middle side of the main body 1 of the device;

[0030] The main body 1 and the airtightness detector 11 are powered by connecting to an external power source.

[0031] A storage box 13 is provided on the outer side of the pressure plate 16, and a safety airbag 14 is provided on the inner side of the storage box 13. An air supply pipe 18 is connected to the upper left side of the safety airbag 14 through the pressure platform 12. A safety air pump 9 is provided on the upper side of the air supply pipe 18 through the top plate 8.

[0032] The top plate 8 is connected to the four corners of the device body 1 by guide rods 7 that pass through the pressing platform 12. The pressing platform 12 can move up and down on the guide rods 7. The upper left and right sides of the front of the device body 1 are respectively equipped with start buttons 5 and the upper middle of the front of the device body 1 is equipped with an emergency stop button 6. The air tightness detector 11 is equipped with multiple air pressure sensors that are connected to the pressure plate 16 respectively.

[0033] In this embodiment, the user first connects the main body 1 of the device and the airtightness detector 11 to an external power source to ensure that the device is powered on and running normally. The user then checks whether the airbag 14 is inside the storage box 13 and in good condition, and whether the safety air pump 9, the detection air pump, and all connecting pipes are securely connected.

[0034] Next, the aluminum alloy die-cast part to be inspected is placed on the inspection platform 3, positioned between the two guard plates 4. The guard plates 4 serve to position and initially protect the die-cast part, preventing it from shifting during the inspection process.

[0035] The user can press the start button 5 on the upper left and right sides of the front of the main body 1 of the device with both hands at the same time, and the hydraulic press 2 will start working.

[0036] The hydraulic press 2 drives the hydraulic sleeve 17 to move downward. Since the pressing platform 12 is connected to the hydraulic sleeve 17 by bolts, and the pressing platform 12 can move up and down on the guide rod 7 (the guide rod 7 plays a guiding role to ensure that the pressing platform 12 moves vertically and smoothly), the pressing platform 12 moves downward together with the hydraulic sleeve 17.

[0037] When the pressure platform 12 descends to a certain position, the pressure plate 16 gradually approaches and eventually completely blocks the upper opening of the aluminum alloy die casting.

[0038] The air pump inside the air tightness tester 11 is connected to the air inlet 15 on the inner side of the middle of the pressure plate 16 through an external connecting pipe, and begins to inject gas into the aluminum alloy die casting.

[0039] Multiple air pressure sensors inside the air tightness tester 11 are connected to the pressure plate 16 to monitor the air pressure changes inside the die casting in real time, thereby determining the air tightness performance of the die casting.

[0040] In addition, while detecting gas injection, the safety air pump 9 is activated.

[0041] The safety air pump 9 delivers gas to the airbag 14 through the air supply pipe 18, and the airbag 14 gradually inflates. Since the storage box 13 is connected to the pressure platform 12 by welding and is located outside the pressure plate 16 (the height of the storage box 13 is lower than the height of the pressure plate 16, so it does not prevent the pressure plate 16 from contacting the die-cast part first), the inflated airbag 14 extends out from the storage box 13 and wraps downward to cover the die-cast part to be tested below, further enhancing the sealing effect and reducing the possibility of gas leakage.

[0042] Throughout the testing process, the operators closely monitored the air pressure data and other information displayed by the air tightness tester 11.

[0043] If any abnormalities are found during the testing process, such as abnormal changes in air pressure, the emergency stop button 6 located at the top center of the front side of the main body 1 can be pressed immediately to stop the testing process so that the equipment or die castings can be inspected and dealt with.

[0044] After the airtightness detector 11 completes the test and obtains the result, the safety air pump 9 reverses and extracts the gas from the airbag 14 through the air supply pipe 18. The airbag 14 then contracts and returns to the storage box 13.

[0045] The hydraulic press 2 drives the hydraulic sleeve 17 to move upward, which in turn causes the lower pressing platform 12, pressure plate 16, etc. to rise back to the initial position.

[0046] The operator removes the tested aluminum alloy die-cast part to complete an airtightness test.

[0047] like Figure 1-6 As shown, the upper front and rear ends of the testing platform 3 are respectively provided with guard plates 4. The external die-cast part to be tested is placed between the two guard plates 4 of the testing platform 3. The storage box 13 is connected to the lower pressure platform 12 by welding. The storage box 13 is located outside the pressure plate 16. The height of the storage box 13 is lower than the height of the pressure plate 16. The safety airbag 14 has two postures: expansion and contraction. The safety air pump 9 delivers or outputs gas into the safety airbag 14 through the air supply pipe 18. The lower pressure platform 12 is connected to the hydraulic sleeve 17 by bolt connection.

[0048] Preferably, the airbag 14 is compactly housed within the storage box 13 in its initial state. The storage box 13 is securely connected to the lower pressure platform 12 using a welding process and is cleverly positioned outside the pressure plate 16, with its height intentionally designed to be lower than the pressure plate 16. This arrangement ensures that when the testing process begins and the lower pressure platform 12 descends, the pressure plate 16 can be the first to contact and seal the upper opening of the die-casting to be tested. When the safety air pump 9 is activated, gas is rapidly delivered to the airbag 14 along the air supply pipe 18. The airbag 14 then expands outward from within the storage box 13, and due to the positional limitation of the storage box 13, it can accurately and precisely wrap around the die-casting to be tested located on the testing platform 3.

[0049] During the encapsulation process, the airbag 14 not only utilizes its expansion properties to fill the tiny gaps between the die-cast part and the testing device, greatly enhancing the overall sealing effect and ensuring the accuracy of the airtightness test results, but also plays a crucial protective role in the extreme case of the die-cast part cracking. When the die-cast part cracks due to excessive internal pressure or its own quality problems, the flexible material of the airbag 14 can effectively buffer the impact force generated by the cracking, preventing the fragments from flying directly at high speed. Its large encapsulation shape can act as a barrier, confining the fragments within a certain range and preventing them from ricocheting and damaging other components of the testing device. More importantly, it protects the operators from injury by the fragments, providing reliable safety assurance for the entire testing process. When the test is completed, the safety air pump 9 reverses, extracting the gas from the airbag 14 through the air supply pipe 18. The airbag 14 then contracts and is smoothly returned to the storage box 13, ready for the next test.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing structure for air tightness testing of aluminum alloy die castings, comprising a device body (1) and an air tightness tester (11) disposed on the outside of the left side of the device body (1). The main body (1) of the device is provided with support frames (10) at the four corners of the upper side. The support frame (10) is provided with a top plate (8) at the upper side. The top plate (8) is provided with a hydraulic press (2) at the middle upper side. The hydraulic press (2) is connected to a hydraulic sleeve (17) through the top plate (8) at the lower side. The hydraulic sleeve (17) is provided with a pressing platform (12) at the lower side. The pressing platform (12) is provided with a pressure plate (16) at the middle lower side. The pressure plate (16) is provided with an air supply hole (15) that is connected to an air tightness tester (11) through an external connecting pipe on the inner side of the middle. A detection platform (3) is provided on the upper middle side of the main body (1) of the device; The main body of the device (1) and the airtightness detector (11) are powered by connecting to an external power source. Its features are: A storage box (13) is provided on the outside of the pressure plate (16), and an airbag (14) is provided on the inside of the storage box (13). An air supply pipe (18) is connected to the upper left side of the airbag (14) through the pressure platform (12), and a safety air pump (9) is provided on the upper side of the air supply pipe (18) through the top plate (8).

2. The sealing structure for airtightness testing of aluminum alloy die-casting parts according to claim 1, characterized in that: The top plate (8) and the main body of the device (1) are provided with guide rods (7) that pass through the pressing platform (12) at the four corners of the connection position. The pressing platform (12) can move up and down on the guide rods (7).

3. The sealing structure for airtightness testing of aluminum alloy die-casting parts according to claim 2, characterized in that: The device body (1) has a start button (5) on the upper left and right sides of the front side, and an emergency stop button (6) on the upper middle of the front side.

4. The sealing structure for airtightness testing of aluminum alloy die-casting parts according to claim 3, characterized in that: The air tightness tester (11) is equipped with multiple air pressure sensors that are connected to the pressure plate (16) respectively. The front and rear ends of the upper side of the test platform (3) are respectively equipped with guard plates (4). The external die-casting part to be tested is placed between the two guard plates (4) of the test platform (3).

5. The sealing structure for airtightness testing of aluminum alloy die-casting parts according to claim 4, characterized in that: The storage box (13) is connected to the pressure platform (12) by welding, and the storage box (13) is located outside the pressure plate (16). The height of the storage box (13) is lower than the height of the pressure plate (16). The airbag (14) has two postures: expansion and contraction.

6. The sealing structure for airtightness testing of aluminum alloy die-casting parts according to claim 1, characterized in that: The safety air pump (9) delivers or outputs gas into the airbag (14) through the air supply pipe (18), and the pressure platform (12) is connected to the hydraulic sleeve (17) by bolt connection.

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