Cast aluminum shell air tightness test fixture

Abstract

The utility model provides an air tightness test fixture for a cast aluminum shell, which is used for detecting a detected shell with a plurality of opening structures and comprises a base, a supporting plate arranged on one side of the base, a first cylinder and a second cylinder, the first cylinder and the second cylinder are arranged on the other side of the base, and one side, with the opening structures, of the detected shell abuts against the first cylinder and the second cylinder. The other side of the tested casing abuts against the supporting plate, the end portion of a first piston rod in the first cylinder is provided with a first plug, the end portion of a second piston rod in the second cylinder is provided with a second plug, and the first plug is provided with an air hole, so that when the first plug abuts against one opening structure of the tested casing and the second plug abuts against the other opening structures of the tested casing, the air hole is formed in the other opening structure of the tested casing. The inner side of the tested casing is communicated to the outer side through an air hole, and the air hole is communicated to the air tightness tester through a pipeline; according to the utility model, the convenience of air tightness detection is improved.

Description

Technical Field

[0001] The utility model relates to the field of air tightness testing equipment, in particular to an air tightness testing jig for a cast aluminum shell. Background Art

[0002] In order to achieve the IP64 waterproof rating, existing cast aluminum housings and other casing products need to be tested for waterproof performance. That means the housing needs to be locked and fixed and placed in 1 meter deep water for air tightness testing. However, this method is inefficient and cannot be applied to mass production testing. Utility Model Content

[0003] The purpose of the utility model is to provide a cast aluminum shell air tightness testing jig which improves the convenience of air tightness testing.

[0004] In order to solve the above technical problems, the utility model provides a cast aluminum shell air tightness test fixture for detecting a tested casing with several open hole structures, including a base, a support plate arranged on one side of the base, a first cylinder and a second cylinder arranged on the other side of the base, the side of the tested casing with the open hole structure presses against the first cylinder and the second cylinder, and the other side of the tested casing presses against the support plate, the end of the first piston rod in the first cylinder has a first plug, and the end of the second piston rod in the second cylinder has a second plug, and an air hole is provided at the first plug, so that the first plug presses against one of the open hole structures of the tested casing, and when the second plug presses against the remaining open hole structures of the tested casing, the inner side of the tested casing is connected to the outside through the air hole, and the air hole is connected to the air tightness tester through a pipeline.

[0005] Furthermore, one side of the air tightness tester is connected to the air supply system through a pipeline.

[0006] Furthermore, an air pressure switch is provided on the base, and one side of the air pressure switch has a first air outlet, which is connected to the side of the first piston rod away from the tested housing and the side of the second piston rod away from the tested housing through a pipeline.

[0007] Furthermore, an air flow splitter is provided between the air tightness tester and the air supply system so that the air flow splitter is connected to the air pressure switch.

[0008] Furthermore, a second air outlet is provided on one side of the air pressure switch, and the second air outlet is connected to a side of the first piston rod close to the tested housing and a side of the second piston rod close to the tested housing through a pipeline.

[0009] Furthermore, the support plate has a pad on one side close to the housing to be tested, so that when the housing to be tested is tested, the side of the housing to be tested is against the pad.

[0010] The beneficial effect of the present invention is that: the casing to be tested is placed between the support plate, the first cylinder and the second cylinder, so that one side of the casing to be tested is against the support plate, and the opening structure on the other side is respectively located at the first cylinder and the second cylinder; then the first piston rod drives the first plug to seal one of the opening structures of the casing to be tested, and the second piston rod synchronously drives the second plug to seal the remaining opening structures of the casing to be tested; after all the opening structures are sealed, the inside and outside of the casing to be tested are connected through the air hole position, and at this time the air tightness tester supplies air to the air hole through the pipeline, so that the inside of the casing to be tested is The air pressure rises, and after the air pressure rises to the set level, the current air pressure state is maintained, and the tested casing is tested for a certain period of time. During this testing time, the air pressure inside the tested casing is monitored in real time by the air tightness tester. If the air pressure of the tested casing remains relatively stable during the testing time period, it can be proved that the air tightness of the tested casing is good. If the air pressure of the tested casing decreases during the testing time period, it proves that there is a problem with the air tightness of the tested casing. This testing method does not require each tested casing to be placed in water, which effectively improves the convenience of air tightness testing and can be applied to the testing link in the mass production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 It is a schematic diagram of the gas circuit connection of the present utility model.

[0013] Figure numerals: 1. Opening structure; 2. Tested casing; 3. Base; 4. Support plate; 5. First cylinder; 6. Second cylinder; 7. First piston rod; 8. First plug; 9. Second piston rod; 10. Second plug; 11. Air tightness tester; 12. Air supply system; 13. Air pressure switch; 14. First air outlet; 15. Air flow splitter; 16. Second air outlet; 17. Pad. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0015] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0016] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0017] like Figure 1-Figure 2 The utility model provides a cast aluminum shell air tightness test fixture for detecting a tested casing 2 having several open hole structures 1, comprising a base 3, a support plate 4 provided on one side of the base 3, a first cylinder 5 and a second cylinder 6 provided on the other side of the base 3, the tested casing 2 having one side of the open hole structure 1 abuts against the first cylinder 5 and the second cylinder 6, and the other side of the tested casing 2 abuts against the support plate 4, the end of the first piston rod 7 in the first cylinder 5 has a first plug 8, the end of the second piston rod 9 in the second cylinder 6 has a second plug 10, and an air hole is provided at the first plug 8, so that when the first plug 8 abuts against one of the open hole structures 1 of the tested casing 2 and the second plug 10 abuts against the remaining open hole structures 1 of the tested casing 2, the inner side of the tested casing 2 is connected to the outside through the air hole, and the air hole is connected to the air tightness tester 11 through a pipeline.

[0018] The casing to be tested is placed between the support plate, the first cylinder and the second cylinder, so that one side of the casing to be tested is against the support plate, and the opening structure on the other side is respectively located at the first cylinder and the second cylinder. Then the first piston rod drives the first plug to seal one of the opening structures of the casing to be tested, and the second piston rod synchronously drives the second plug to seal the remaining opening structures of the casing to be tested. After all the opening structures are sealed, the inside and outside of the casing to be tested are connected through the air hole position. At this time, the air tightness tester supplies air to the air hole through the pipeline, so that the air pressure inside the casing to be tested rises. After the pressure rises to the set level, the current air pressure state is maintained, and the casing under test is tested for a certain period of time. During this testing time, the air pressure inside the casing under test is monitored in real time by the air tightness tester. If the air pressure of the casing under test remains relatively stable during the testing time period, it can be proved that the air tightness of the casing under test is good. If the air pressure of the casing under test decreases during the testing time period, it proves that there is a problem with the air tightness of the casing under test. This testing method does not require each casing under test to be placed in water, which effectively improves the convenience of air tightness testing and can be applied to the testing link in the mass production process.

[0019] Among them, the air tightness tester can be the Xt76 series air tightness tester.

[0020] Preferably, one side of the air tightness tester 11 is connected to the air supply system 12 through a pipeline.

[0021] Specifically, the air tightness tester is supplied with air through the air supply system, so that the air tightness tester can stably supply air to the air hole through the pipeline, and because the air supply passes through the air tightness tester, the air tightness tester can monitor the current air pressure status in real time.

[0022] Among them, the air supply system can use an air pump to supply air.

[0023] Preferably, an air pressure switch 13 is provided on the base 3, and the air pressure switch 13 has a first air outlet 14 on one side. The first air outlet 14 is connected to the side of the first piston rod 7 away from the tested housing 2 and the side of the second piston rod 9 away from the tested housing 2 through a pipeline.

[0024] Specifically, the use status of the first piston rod and the second piston rod is controlled by the air pressure switch. When the open hole structure needs to be sealed, the air pressure switch is turned on, so that the first air outlet is synchronously supplied with air through the pipeline to the side of the first piston rod away from the tested casing and the side of the second piston rod away from the tested casing 2, so that the first piston rod pushes the first plug to move toward the tested casing for sealing, and at the same time, the second piston rod pushes the second plug to move toward the tested casing for sealing, thereby improving the stability of the tested casing during air tightness testing.

[0025] Preferably, an air flow splitter 15 is provided between the air tightness tester 11 and the air supply system 12 so that the air flow splitter 15 is in communication with the air pressure switch 13 .

[0026] Specifically, the air flow supplied from the air supply system is divided into two paths through an air flow splitter, one of which is connected to the air tightness tester to ensure the air supply inside the tested casing, and the other is connected to the air pressure switch to ensure the stable sealing effect of the first plug and the second plug.

[0027] Preferably, one side of the air pressure switch 13 has a second air outlet 16 , and the second air outlet 16 is connected to the side of the first piston rod 7 close to the tested housing 2 and the side of the second piston rod 9 close to the tested housing 2 through a pipeline.

[0028] Specifically, when the detection is completed and the first plug and the second plug need to be removed, the air pressure switch is switched to the second air outlet for use, so that the air pressure switch supplies air to the side of the first piston rod close to the tested housing and the side of the second piston rod close to the tested housing, thereby causing the first piston rod to drive the first plug away from the tested housing, and at the same time the second piston rod drives the second plug away from the tested housing.

[0029] Preferably, the support plate 4 has a pad 17 on one side close to the tested housing 2 , so that when the tested housing 2 is being tested, the side of the tested housing 2 rests against the pad 17 .

[0030] Specifically, when the housing under test is pushed by the first piston rod and the second piston rod, the other side of the housing under test is supported by the pad, thereby improving the stability of the housing under test during the air tightness testing process.

[0031] Based on the structural description of the cast aluminum housing air tightness test fixture, this solution provides the following operating procedures:

[0032] Step 1: Place the tested casing 2 on the base 3 and switch the air pressure switch 13 to the first air outlet 14. At this time, the air pump from the air compressor room supplies air, which is divided into two paths through the air flow splitter 15. One path passes through the air pressure switch 13, and the air pressure switch 13 further splits the air flow into two paths and sends them to the first cylinder 5 and the second cylinder 6, so that the first piston rod 7 and the second piston rod 9 respectively push the first plug 8 and the second plug 10 against the opening structure 1 of the tested casing 2. At the same time, the other air flow at the air flow splitter 15 enters the air tightness tester 11.

[0033] Step 2: After the airflow at the airtightness tester 11 passes through the airtightness tester 11, it continues to enter the tested housing 2 along the air holes, causing the air pressure in the tested housing 2 to rise to a set value (104 Pa in one embodiment). At this time, the airtightness tester 11 suspends the air supply to the tested housing 2 and performs real-time air pressure detection on the tested housing 2 through the airtightness tester 11. The test time can be set to 60 seconds.

[0034] Step 3: After the test time is over, the air tightness tester 11 feeds back the test result. If the air pressure inside the tested housing 2 is stable at above 100 Pa within 60 seconds, it means that the tested housing 2 has passed the air tightness test. Otherwise, it means that the tested housing 2 has failed the air tightness test.

[0035] Step 4: Qualified products enter the next process, and the reasons for the unqualified tested housings 2 are investigated and the above-mentioned airtightness test is carried out again.

[0036] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that is the same or similar to that of the present application falls within the scope of protection of the present invention.

Claims

1. A cast aluminum housing air tightness test fixture for testing a housing (2) having a plurality of opening structures (1), characterized in that: The invention comprises a base (3), a support plate (4) provided on one side of the base (3), a first cylinder (5) and a second cylinder (6) provided on the other side of the base (3); a side of the tested housing (2) having an opening structure (1) abuts against the first cylinder (5) and the second cylinder (6); the other side of the tested housing (2) abuts against the support plate (4); the end of the first piston rod (7) in the first cylinder (5) has a first plug (8); the end of the second piston rod (9) in the second cylinder (6) has a second plug (10); and an air hole is provided at the first plug (8), so that when the first plug (8) abuts against one of the opening structures (1) of the tested housing (2) and the second plug (10) abuts against the other opening structures (1) of the tested housing (2), the inside of the tested housing (2) is connected to the outside through the air hole, and the air hole is connected to the air tightness tester (11) through a pipeline.

2. The cast aluminum housing air tightness test fixture according to claim 1, characterized in that: One side of the air tightness tester (11) is connected to the air supply system (12) through a pipeline.

3. The cast aluminum housing air tightness test fixture according to claim 2, characterized in that: An air pressure switch (13) is provided on the base (3), and a first air outlet (14) is provided on one side of the air pressure switch (13). The first air outlet (14) is connected to a side of the first piston rod (7) away from the tested housing (2) and a side of the second piston rod (9) away from the tested housing (2) through a pipeline.

4. The cast aluminum housing air tightness test fixture according to claim 3, characterized in that: An air flow splitter (15) is provided between the air tightness tester (11) and the air supply system (12), so that the air flow splitter (15) is communicated with the air pressure switch (13).

5. The cast aluminum housing air tightness test fixture according to claim 3, characterized in that: One side of the air pressure switch (13) has a second air outlet (16), and the second air outlet (16) is connected to the side of the first piston rod (7) close to the tested housing (2) and the side of the second piston rod (9) close to the tested housing (2) through a pipeline.

6. The cast aluminum housing air tightness test fixture according to claim 1, characterized in that: The support plate (4) has a pad (17) on one side close to the tested housing (2), so that when the tested housing (2) is tested, the side of the tested housing (2) abuts against the pad (17).

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