Testing device, manufacturing method thereof and waterproof performance testing method

Abstract

The invention provides a testing device, a manufacturing method thereof and a waterproof performance testing method. The testing device comprises a testing shell, a supporting piece and a thermal expansion rubber block. A test cavity is defined in the test shell; the supporting piece is arranged on the inner wall of the testing cavity; the thermal expansion rubber block is located in the testing cavity and supported on the supporting piece, the thermal expansion rubber block is attached to the inner circumferential wall of the testing shell so that the testing cavity can be divided into a first cavity and a second cavity, and the first cavity is used for injecting testing liquid in the testing process. The testing device can simulate a stand column structure on a body in white, so that in the vehicle research and development process, water immersion testing on the whole body in white is replaced by testing the waterproof performance of the testing device, the waterproof sealing performance of the body stand column can be rapidly and reliably verified, the research and development efficiency of the vehicle is improved, and the development cost is reduced. The research and development cost is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle manufacturing, specifically to a testing device and its manufacturing method, and a waterproof performance testing method. Background Technology

[0002] With the development of the automotive industry, some vehicles are equipped with emergency buoyancy control to provide buoyancy in the event of an accidental fall into water, giving occupants time to escape or await rescue. This function relies on the vehicle's waterproof sealing performance.

[0003] The water pressure environment required for emergency floating operations typically reaches 1.1 to 1.3 meters. At this depth, the water pressure will submerge the vehicle's pillars (such as the A-pillar, B-pillar, and C-pillar). Existing testing equipment is costly, inefficient, and prolongs the vehicle's development cycle. Summary of the Invention

[0004] This application provides a testing device and its manufacturing method, as well as a waterproof performance testing method, to solve the problem of how to quickly and reliably verify the waterproof sealing performance of vehicle body pillars during vehicle development.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions: In a first aspect, embodiments of this application provide a testing device, comprising: a test housing, a support member, and a thermally expanding adhesive block. The test housing defines a test cavity; the support member is disposed on the inner wall of the test cavity; the thermally expanding adhesive block is located within the test cavity and supported on the support member, the thermally expanding adhesive block being fitted against the inner peripheral wall of the test housing to divide the test cavity into a first cavity and a second cavity, the first cavity being used to inject test fluid during the testing process.

[0006] In some possible implementations of the first aspect, the test housing is open at both ends along its height direction; the test housing includes a plurality of wall panels distributed circumferentially along the test housing, and the angle between any two adjacent wall panels is greater than 0°.

[0007] In some possible implementations of the first aspect, the plurality of wall panels includes: a first wall panel, a second wall panel, and a third wall panel. The second wall panel is perpendicular to the first wall panel; the third wall panel is connected between the first wall panel and the second wall panel; the angle between the third wall panel and the first wall panel on the inner circumferential side of the test housing is greater than or equal to 5° and less than or equal to 45°.

[0008] In some possible implementations of the first aspect, the third wall panel has a connecting plate portion extending toward the outer periphery of the test housing at one end near the first wall panel, and the connecting plate portion is welded and fixed to the first wall panel by multiple weld points.

[0009] In some possible implementations of the first aspect, multiple solder joints are spaced apart along the height direction of the test housing; a conductive sealant is filled between the connecting plate and the first wall plate, the material of the conductive sealant being a first material, and the material of the solder joints including the first material.

[0010] In some possible implementations of the first aspect, a sealant is filled between the connecting plate and the first wall panel, and the sealant is located on the side of the plurality of weld points away from the third wall panel.

[0011] In some possible implementations of the first aspect, the inner wall of the test chamber has mounting holes; a first part of the support is snapped into the mounting holes; a second part of the support extends toward the interior of the test housing; and a thermal expansion adhesive block connects the second part of the support.

[0012] In some possible implementations of the first aspect, the thermally expanded adhesive block comprises: a foamed substrate and a hot-melt filler. The foamed substrate has pores; the hot-melt filler fills the pores.

[0013] In some possible implementations of the first aspect, the outer surface of the test housing is provided with a paint layer.

[0014] Secondly, embodiments of this application provide a method for manufacturing a testing device, characterized in that the method includes: supporting a thermally expandable adhesive block blank on a support member on the inner wall of a test housing; wherein the thermally expandable adhesive block blank includes a foaming agent layer and a hot melt adhesive layer stacked together; heating the thermally expandable adhesive block blank to a first preset temperature to cause the foaming agent layer to expand and form a foamed substrate with pores; heating the hot melt adhesive layer to a second preset temperature to cause the hot melt adhesive layer to melt and fill the pores to form a thermally expandable adhesive block that adheres to the inner circumferential surface of the test housing; wherein the second preset temperature is greater than the first preset temperature.

[0015] In some possible implementations of the second aspect, the first preset temperature is greater than or equal to 120°C and less than or equal to 140°C; and / or, the second preset temperature is greater than or equal to 150°C and less than or equal to 160°C.

[0016] In some possible implementations of the second aspect, prior to the step of supporting the thermally expanded rubber block blank on a support on the inner wall of the test housing, the manufacturing method further includes forming a paint layer on at least the outer surface of the test housing by an electrophoretic process.

[0017] Thirdly, embodiments of this application provide a method for testing the waterproof performance of a testing device, wherein the testing device is the same as that in the first aspect. The testing method includes: arranging the testing device with a first cavity located above a second cavity; and injecting a testing liquid into the first cavity.

[0018] The testing apparatus, its manufacturing method, and the waterproof performance testing method provided in this application have the following beneficial effects: The testing device provided in this application can simulate the pillar structure on the body-in-white. Therefore, during the vehicle development process, the waterproof performance of the testing device can be tested instead of immersing the entire body-in-white in water. This allows for rapid and reliable verification of the waterproof sealing performance of the body pillars, which helps to accelerate vehicle development efficiency and reduce development costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a test apparatus provided in some embodiments of this application.

[0020] Figure 2 for Figure 1 A schematic diagram of the test device after removing one of the wall panels.

[0021] Figure 3 for Figure 1 Top view of the test device.

[0022] Figure 4 for Figure 3 A top view of the test housing of the testing device.

[0023] Figure 5 for Figure 1 Another schematic diagram of the test device (showing solder joints).

[0024] Figure 6 for Figure 5 A magnified view of part A in the middle.

[0025] Figure 7 for Figure 1 A schematic diagram of the structure of the first wall panel of the test device.

[0026] Figure 8 This is a structural schematic diagram of a thermal expansion rubber block blank provided in some other embodiments of this application.

[0027] Figure 9 A flowchart illustrating a method for manufacturing a testing apparatus provided in some embodiments of this application.

[0028] Figure 10 A flowchart illustrating another method for manufacturing the test apparatus provided in some embodiments of this application.

[0029] Figure 11 A flowchart of a waterproof performance testing method for a testing apparatus provided in some embodiments of this application.

[0030] Explanation of reference numerals in the attached figures Test device 1; test housing 10; test cavity 11; first cavity 11a; second cavity 11b; wall panel 12; first wall panel 121; second wall panel 122; third wall panel 123; connecting plate 124; mounting hole 125; paint layer 126; Support component 20; thermal expansion adhesive block 30; thermal expansion adhesive block blank 30a; foaming agent layer 30a1; hot melt adhesive layer 30a2; solder joint 40; conductive sealant 50; sealant 60. Detailed Implementation

[0031] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] In this application, the accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0033] Unless otherwise stated, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items. The singular forms "a," "the," and "the" as used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0034] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified. In the description of this application, "several" means one or more, unless otherwise explicitly specified.

[0035] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this application.

[0036] In the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the description of this application, unless otherwise expressly defined, the terms "above," "over," "on top of," "below," "below," "under," or "below" for "first feature over second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "below," and "over" for "first feature over second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature over second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0038] With the development of the automotive industry, some vehicles are equipped with emergency buoyancy control to provide buoyancy in the event of an accidental fall into water, giving occupants time to escape or await rescue. This function relies on the vehicle's waterproof sealing performance.

[0039] The water pressure environment required for emergency floating operations typically reaches 1.1 to 1.3 meters. At this depth, the water pressure will submerge the vehicle's pillars (such as A-pillars, B-pillars, and C-pillars). In related technologies, a pre-assembled body-in-white is usually used as the testing instrument. The body-in-white is immersed in a test solution, and the water stains inside the pillars are observed to determine whether the pillars' waterproof performance is up to standard. This method is costly, inefficient, and prolongs the vehicle's development cycle.

[0040] To address the aforementioned issues, some embodiments of this application provide a testing device and its manufacturing method, as well as a waterproof performance testing method. The testing device includes a testing housing and a thermally expanding rubber block filled within the testing housing to simulate the pillar structure on a vehicle body. Therefore, during vehicle development, the waterproof performance of the testing device can be tested instead of immersing the entire vehicle body in water, thereby enabling rapid and reliable verification of the waterproof sealing performance of the vehicle body pillars. This facilitates faster vehicle development and reduces development costs.

[0041] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0042] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the test device 1 provided in some embodiments of this application. Figure 2 for Figure 1 A schematic diagram of the structure of the test device 1 after removing one of the wall panels 12. Figure 3 for Figure 1 A top view of the testing device 1. The testing device 1 includes: a testing housing 10, a support member 20, and a thermal expansion block 30. A testing cavity 11 is defined within the testing housing 10. The support member 20 is disposed on the inner wall of the testing cavity 11; the thermal expansion block 30 is located inside the testing cavity 11 and supported on the support member 20. The thermal expansion block 30 is attached to the inner peripheral wall of the testing housing 10 to divide the testing cavity 11 into a first cavity 11a and a second cavity 11b. The first cavity 11a is used to inject test fluid during the testing process.

[0043] In this way, the pillar structure on the body-in-white can be simulated by the testing device 10, and the cavity inside the pillar structure can be simulated by the testing chamber 11. Then, a heat-expanding adhesive block 30 for waterproofing is set in the testing chamber 11. In this case, by injecting test liquid into the first cavity 11a and observing whether there is test liquid from the first cavity 11a in the second cavity 11b, the waterproof performance of the testing device 10 can be verified. This can replace the immersion test of the entire body-in-white, so that the waterproof sealing performance of the body pillar can be verified quickly and reliably, which is conducive to accelerating the vehicle development efficiency and reducing the development cost.

[0044] It should be noted that some embodiments of this application do not limit the shape and structure of the test housing 10. The shape and structure of the test housing 10 can be adaptively changed based on the simulation requirements of the pillars of different vehicle models, or the shape and structure of the test housing 10 can be adaptively changed based on the simulation requirements of different pillars (such as A-pillar, B-pillar, or C-pillar) of the same vehicle model. Therefore, the accompanying drawings of this application are only an example of the structure of the test housing 10 and should not be regarded as a limitation of this application.

[0045] In some embodiments, such as Figures 1 to 3As shown, the test housing 10 is open at both ends along its height direction. The test housing 10 includes a plurality of wall panels 12 distributed circumferentially along the test housing 10, and the angle between any two adjacent wall panels 12 is greater than 0°. For example, the angle between any two adjacent wall panels 12 is 1°, 5°, 15°, 25°, 45°, 60°, 75°, 90°, 105°, 120°, 135°, 150°, 165°, or 180°. In this way, by adjusting the angle between any two adjacent wall panels 12, different column structures can be simulated, thereby improving the versatility of the test device 1.

[0046] For example, panel 12 can be a sheet metal part to simulate the material of a body-in-white.

[0047] Please see Figure 4 , Figure 4 for Figure 3 A top view of the test housing 10 of the testing apparatus 1. Multiple wall panels 12 include: a first wall panel 121, a second wall panel 122, and a third wall panel 123. The second wall panel 122 is perpendicular to the first wall panel 121; the third wall panel 123 connects the first wall panel 121 and the second wall panel 122; the angle α between the third wall panel 123 and the first wall panel 121 on the inner circumference of the test housing 10 is greater than or equal to 5° and less than or equal to 45°. For example, α can be 5°, 15°, 25°, or 45°.

[0048] It is understandable that gaps with small angles (such as less than 45°) may form between different wall panels of the vehicle body pillar. Thus, by adjusting the angle α between the third wall panel 123 and the first wall panel 121, these small gaps can be simulated. Then, the above-mentioned water injection test can be used to test whether the thermal expansion adhesive block 30 can completely fill these gaps to achieve a waterproof effect.

[0049] In some embodiments, such as Figure 3 and Figure 4As shown, there are two first wall panels 121, which are arranged in parallel. There are also two second wall panels 122, which are located between the two first wall panels 121 and are perpendicular to them. A third wall panel 123 is provided between each first wall panel 121 and a second wall panel 122. That is, each first wall panel 121 is connected to two third wall panels 123. Thus, four included angles α can be formed between the two first wall panels 121 and the four corresponding third wall panels 123. The four included angles α include angles α1, α2, α3, and α4. By adjusting the included angles α1, α2, α3, and α4 to 5°, 15°, 25°, and 45° respectively, the filling ability of the thermal expansion adhesive block 30 to various narrow gaps can be verified by a testing device 1. This is beneficial to further improve testing efficiency, accelerate vehicle development efficiency, and reduce development costs.

[0050] In some embodiments, the second wall panel 122 and the third wall panel 123 may be constructed as a single piece; in other embodiments, the first wall panel 121 and the third wall panel 123 may be constructed as a single piece. This reduces the number of weld points and improves sealing performance.

[0051] Please see Figure 5 and Figure 6 , Figure 5 for Figure 1 Another schematic diagram of the test device 1 (showing the solder joints). Figure 6 for Figure 5 A partially enlarged view of part A. The third wall panel 123, near the first wall panel 121, has a connecting plate portion 124 extending towards the outer periphery of the test housing 10. The connecting plate portion 124 is welded and fixed to the first wall panel 121 by multiple weld points 40. This simulates the connection method between sheet metal parts on a car body, which helps improve the reliability of the test results from the testing device 1.

[0052] In some embodiments, the second wall panel 122, the third wall panel 123 and the connecting plate portion 124 can be constructed as a single piece, thereby reducing weld points and improving sealing performance.

[0053] In some embodiments, such as Figure 5 and Figure 6 As shown, multiple solder joints 40 are spaced apart along the height direction of the test housing 10; conductive sealant is filled between the connecting plate portion 124 and the first wall plate 121, and the material of the conductive sealant is a first material, and the material of the solder joints 40 includes the first material.

[0054] It is understood that the conductive sealant is filled between the connecting plate portion 124 and the first wall panel 121 before welding. Therefore, during the welding process, both the portion of the connecting plate portion 124 at the weld point 40 and the portion of the first wall panel 12 at the weld point 40 will melt and mix with the material of the conductive sealant (the first material) to solidify. Thus, the material of the solidified weld point 40 includes the first material. This further simulates the connection method between sheet metal parts on a white body, which helps improve the reliability of the test results of the testing device 1.

[0055] In some embodiments, the interval between any two adjacent weld points 40 in the plurality of weld points 40 is greater than or equal to 30 mm and less than or equal to 50 mm. For example, the interval between any two adjacent weld points 40 is 30 mm, 35 mm, 40 mm, or 50 mm. In this way, the layout of weld points between sheet metal parts on a body-in-white can be simulated, which helps to improve the reliability of the test results of the test device 1.

[0056] In some embodiments, the conductive sealant may be a structural adhesive or a spot welding adhesive, thereby allowing verification of the sealing effect of the structural adhesive or spot welding adhesive and further simulating the sealing structure of the body-in-white sheet metal.

[0057] In some embodiments, a sealant is filled between the connecting plate portion 124 and the first wall panel 12, and the sealant is located on the side of the plurality of weld points 40 away from the third wall panel 12. This allows for verification of the sealing effect of the sealant and further simulation of the sealing structure of the body-in-white sheet metal. For example, the sealant can be a weld sealant.

[0058] Please see Figure 7 and Figure 8 , Figure 7 for Figure 1 A schematic diagram of the structure of the first wall panel of the test device. Figure 8 This is a structural schematic diagram of a thermally expanding rubber block blank provided in other embodiments of this application. (In conjunction with...) Figure 1 and Figure 2 The inner wall of the test chamber 11 has mounting holes 125; a first part of the support member 20 is engaged in the mounting holes 125; a second part of the support member 20 extends toward the interior of the test housing 10; and a thermally expanding adhesive block 30 is connected to the second part of the support member 20. Thus, the support member 20 can provide support for the thermally expanding adhesive block 30 (i.e., the thermally expanding adhesive block blank 30a) before foaming and expansion, allowing the thermally expanding adhesive block blank 30a to foam in a predetermined position and fill between the multiple wall panels 12.

[0059] For example, refer to Figure 8The thermal expansion adhesive block blank 30a includes a foaming agent layer 30a1 and a hot melt adhesive layer 30a2 stacked together. During the heating process of the thermal expansion adhesive block blank 30a, the thermal expansion adhesive block blank 30a is first heated to a first preset temperature so that the foaming agent layer 30a1 expands by heat and forms a foamed substrate with pores. Then, the hot melt adhesive layer 30a2 is heated to a second preset temperature so that the hot melt adhesive layer 30a2 melts and fills the pores to form a thermal expansion adhesive block 30 that adheres to the inner peripheral surface of the test housing 10.

[0060] For example, the first preset dimension is greater than or equal to 120℃ and less than or equal to 140℃; the second preset dimension is greater than or equal to 150℃ and less than or equal to 160℃.

[0061] In some embodiments, the thermal expansion adhesive block 30 includes a foamed substrate and a hot-melt filler adhesive, wherein the foamed substrate has pores and the hot-melt filler adhesive fills the pores. This improves the sealing effect of the thermal expansion adhesive block 30 on the test chamber 11, further simulating the sealing structure inside the body-in-white pillar cavity.

[0062] In some embodiments, such as Figure 1 As shown, the outer surface of the test housing 10 is provided with a paint layer 126 to simulate the outer surface structure of the body-in-white pillar.

[0063] Some embodiments of this application also provide a method for manufacturing a testing device; see [link to relevant documentation]. Figure 9 , Figure 9 A flowchart illustrating a method for manufacturing a testing apparatus provided in some embodiments of this application. The manufacturing method includes steps S1 to S3.

[0064] In step S1, the thermal expansion rubber block blank is supported on the support member on the inner wall of the test housing.

[0065] For example, the thermally expanded adhesive block blank 30a includes a foaming agent layer 30a1 and a hot melt adhesive layer 30a2 stacked together. The foaming agent layer 30a1 includes, for example, EVA foaming agent (ethylene-vinyl acetate copolymer foaming agent) material.

[0066] In step S2, the thermal expansion block blank is heated to a first preset temperature so that the foaming agent layer expands under heat and forms a foamed substrate with pores.

[0067] For example, the first preset dimension is greater than or equal to 120°C and less than or equal to 140°C. In this way, the actual baking temperature of the body-in-white can be simulated.

[0068] It is understandable that the expanded foam substrate can be filled between multiple wall panels 12. However, due to the presence of pores, the foam substrate does not have the function of isolating the first cavity from the second wall.

[0069] In step S3, the hot melt adhesive layer is heated to a second preset temperature to melt the hot melt adhesive layer and fill the holes to form a thermally expanded adhesive block that adheres to the inner circumferential surface of the test housing; the second preset temperature is greater than the first preset temperature.

[0070] For example, the second preset dimension is greater than or equal to 150°C and less than or equal to 160°C. In this way, the actual baking temperature of the body-in-white can be simulated.

[0071] In this way, the hot melt adhesive layer can be heated and melted, filling the pores and between the foamed substrate and the wall panel 12 to form a thermally expanded adhesive block that adheres to the inner circumferential surface of the test housing.

[0072] The manufacturing method of the testing device provided in some embodiments of this application can produce the testing device 1 provided in the above embodiments, and the produced testing device 1 has the same technical effect as the testing device 1 in the above embodiments, which will not be repeated here.

[0073] It should be noted that the baking process in steps S2 and S3 above can be a real baking process performed by fixing the test device 1 to the body of another car model, thereby further simulating the formation process of the sealing block in the body-in-white pillar cavity.

[0074] See Figure 10 , Figure 10 A flowchart illustrating another method for manufacturing the testing apparatus provided in some embodiments of this application. Prior to step S1, the manufacturing method further includes step S4.

[0075] In step S4, a paint layer is formed on at least the outer surface of the test housing 10 by an electrophoresis process.

[0076] In this way, the outer surface structure of the body-in-white pillar can be simulated.

[0077] It should be noted that this electrophoresis process can be a real electrophoresis process in which the test device 1 is fixed to the body of another car model, thereby further simulating the outer surface structure of the body-in-white pillars.

[0078] Some embodiments of this application also provide a method for testing the waterproof performance of a testing device; see [link to relevant documentation]. Figure 11 , Figure 11 A flowchart of a waterproof performance testing method for a testing device provided in some embodiments of this application is shown. The testing method includes steps S10 to S20.

[0079] In step S10, the test device is arranged such that the first cavity is located on the upper side of the second cavity.

[0080] In step S20, test fluid is injected into the first cavity.

[0081] Thus, by observing whether the test liquid is present in the second chamber, it can be determined whether the waterproof performance of the test device meets the requirements.

[0082] For example, the waterproof performance of the test device can be determined by recording the water pressure that the thermal expansion block 30 can withstand (i.e., the injection depth of the test liquid).

[0083] For example, the test liquid can be clean water, sewage containing impurities, or rainwater, etc., and this application does not limit it.

[0084] It is understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0085] It is understood that the various implementation methods described in this application can be implemented individually or in combination, and the embodiments of this application are not limited in this respect.

[0086] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the aforementioned method implementations, and will not be repeated here.

[0087] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A test device, characterized by The test device comprises: a test housing (10) defining a test cavity (11) inside the test housing (10); a support (20) arranged on an inner wall of the test cavity (11); a thermal expansion glue block (30) located in the test cavity (11) and supported on the support (20), the thermal expansion glue block (30) being attached to an inner circumferential wall of the test housing (10) to divide the test cavity (11) into a first cavity (11a) and a second cavity (11b), the first cavity (11a) being used for injecting a test liquid during a test.

2. The test device according to claim 1, wherein: the test housing (10) is open at both ends along a height direction of the test housing (10); the test housing (10) comprises a plurality of wall plates (12) distributed along a circumferential direction of the test housing (10), and an angle between any two adjacent wall plates (12) is greater than 0°.

3. The test device according to claim 2, wherein: the plurality of wall plates (12) comprises: a first wall plate (121); a second wall plate (122) perpendicular to the first wall plate (121); a third wall plate (123) connected between the first wall plate (121) and the second wall plate (122); an angle between the third wall plate (123) and the first wall plate (121) on an inner circumferential side of the test housing (10) is greater than or equal to 5° and less than or equal to 45°.

4. The test device of claim 3, wherein, an end of the third wall plate (123) close to the first wall plate (121) is provided with a connecting plate portion (124) extending to an outer circumferential side of the test housing (10), and the connecting plate portion (124) and the first wall plate (121) are welded and fixed by a plurality of welding points (40).

5. The test device of claim 4, wherein, the plurality of welding points (40) are arranged at intervals along a height direction of the test housing (10); a conductive sealant is filled between the connecting plate portion (124) and the first wall plate (121), a material of the conductive sealant is a first material, and a material of the welding points (40) comprises the first material.

6. The test device according to claim 4, wherein: a sealant is filled between the connecting plate portion (124) and the first wall plate (121), and the sealant is located on a side of the plurality of welding points (40) away from the third wall plate (123).

7. The test device according to claim 1, wherein: an inner wall of the test cavity (11) has a mounting hole (125); a first part of the support (20) is clamped in the mounting hole (125); a second part of the support (20) extends towards an inside of the test housing (10); and the thermal expansion glue block (30) is connected to the second part of the support (20).

8. The test device of claim 1, wherein, the thermal expansion glue block (30) comprises: a foamed base material having a plurality of holes; a hot melt filling glue filled in the holes.

9. The test device of claim 1, wherein, An outer surface of the test housing (10) is provided with a paint layer (126).

10. A manufacturing method of a test device, characterized by, The test device comprises: supporting the thermal expansion rubber block blank on a support on an inner wall of the test housing; wherein the thermal expansion rubber block blank comprises a foaming agent layer and a hot melt adhesive layer arranged in a stack; heating the thermal expansion rubber block blank to a first preset temperature, so that the foaming agent layer is heated and expanded to form a foamed substrate with pores; heating the hot melt adhesive layer to a second preset temperature, so that the hot melt adhesive layer is melted and fills the pores, to form a thermal expansion rubber block that is attached to an inner circumferential surface of the test housing; wherein the second preset temperature is greater than the first preset temperature.

11. The method of manufacturing a test device according to claim 10, wherein, The first preset temperature is greater than or equal to 120°C and less than or equal to 140°C; and / or, The second preset temperature is greater than or equal to 150°C and less than or equal to 160°C.

12. The method of manufacturing a test device according to claim 11, wherein, Before the step of supporting the thermal expansion rubber block blank on a support on an inner wall of the test housing, the manufacturing method further comprises: forming a paint layer on at least an outer surface of the test housing by an electrophoresis process.

13. A method of testing waterproof performance of a test device, characterized by, The test device is according to any one of claims 1-9; The test method comprises: arranging the test device in a manner that the first cavity is located on the upper side of the second cavity; injecting a test liquid into the first cavity.

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