A device for testing the corrosion resistance of an aluminum alloy structural member

Abstract

The present application relates to the technical field of metal testing, and specifically relates to an aluminum alloy structural member corrosion resistance testing device, which comprises a box body, a box cover, a rotating disc, a separation assembly, an environment adjusting system, a rotating clamping assembly and a controller. The rotating disc is arranged rotatably at the bottom of the inner cavity of the box body. The separation assembly comprises a plurality of separation racks arranged circumferentially along the rotating disc and separation plates which are detachably inserted into the separation racks. The separation racks divide the test cavity into a plurality of independent cavities. The adjacent cavities are closed when the separation plates are inserted and are connected to form a composite test cavity when the separation plates are removed. The environment adjusting system comprises a salt mist generating assembly, a drying assembly and a gas generating assembly corresponding to each cavity, respectively, for providing different corrosion test environments. The rotating clamping assembly can realize bidirectional rotation of the workpiece. The device can realize flexible switching between independent testing and composite testing of various corrosion environments, improve the uniformity of the salt mist contact of the workpiece and the accuracy of the test results.

Description

Technical Field

[0001] This invention relates to the field of metal testing technology, and more specifically to a device for testing the corrosion resistance of aluminum alloy structural components. Background Technology

[0002] Aluminum alloy structural components are widely used in aerospace, automotive, rail transportation, and shipbuilding industries. However, they are prone to pitting corrosion, intergranular corrosion, and stress corrosion cracking in chloride-containing environments such as marine and industrial atmospheres. To evaluate the corrosion resistance of aluminum alloy structural components, accelerated testing using salt spray testing equipment is typically employed to simulate a corrosive environment. Salt spray refers to tiny salt-containing droplets in the atmosphere; salt spray testing is an environmental test that utilizes artificially simulated salt spray conditions created by salt spray testing equipment to assess the corrosion resistance of products or metallic materials.

[0003] Existing salt spray testing equipment typically consists of a single-chamber structure, providing only one corrosive environment (such as neutral salt spray), thus offering limited functionality. To conduct tests under multiple conditions, such as salt spray, drying, humidification, and sulfur dioxide, multiple devices or sample transfers are often required, resulting in cumbersome operation, low testing efficiency, and potential sample contamination during transfer between different devices, affecting the consistency of test results. While some existing devices feature multiple independent chambers, sample switching between chambers relies on transfer mechanisms, leading to complex structures and an inability to combine adjacent chambers to create a composite testing environment as needed.

[0004] In addition, the workpiece clamping mechanism in existing salt spray testing equipment is mostly fixed or rotated in one direction. Fixed clamping leads to uneven contact between the workpiece and salt spray, and the clamped part is blocked for a long time, which affects the accuracy of the test results. Although rotation in one direction can improve the salt spray coverage in a certain direction, there are still spray dead corners for aluminum alloy structural parts with complex geometry or porous structure, and the degree of corrosion inside and outside the hole is large.

[0005] Therefore, a new type of corrosion resistance testing device is needed to solve the above problems. Summary of the Invention

[0006] This invention provides a device for testing the corrosion resistance of aluminum alloy structural components, thereby solving the technical problems of existing corrosion resistance testing devices having limited functionality and poor testing accuracy.

[0007] To address the above problems, the present invention provides a corrosion resistance testing device for aluminum alloy structural components, employing the following technical solution: A device for testing the corrosion resistance of aluminum alloy structural components includes a housing, a cover, and a controller. The housing forms a test chamber, and the cover has a sealing structure. The device further includes: a turntable rotatably disposed at the bottom of the inner cavity of the housing; a partitioning assembly including multiple partition frames arranged circumferentially along the turntable and partition plates detachably inserted into the partition frames, wherein the partition frames divide the test chamber into multiple independent chambers; when the partition plates are inserted into the partition frames, they close the communication between adjacent chambers; when the partition plates are removed, they connect the adjacent chambers to form a composite test chamber; and an environmental control system, including components connected to each independent chamber. At least two of the corresponding salt spray generating components, drying components, and gas generating components are used to provide different corrosion testing environments to the corresponding chambers; a rotating clamping assembly is disposed in each of the independent chambers, including a first rotating frame, a second rotating frame, and a clamping mechanism. The first rotating frame is rotatably mounted on the partition frame about a first axis, the second rotating frame is rotatably mounted inside the first rotating frame about a second axis perpendicular to the first axis, and the clamping mechanism is disposed on the second rotating frame for clamping the workpiece to be tested; the controller is electrically connected to the environmental conditioning system and the rotating clamping assembly respectively.

[0008] Its beneficial effects are as follows: The device, through the cooperation of a turntable, partitioning components, an environmental control system, and a rotary clamping assembly, allows the internal cavity of the test chamber to be divided into multiple independent chambers. The partitions can be removed to connect adjacent chambers and form a composite test chamber as needed for testing. Therefore, independent testing in various corrosive environments, as well as testing in composite environments, can be achieved on the same device without changing equipment or transferring samples. The rotary clamping assembly, through a first and second rotating frame, rotates the workpiece around two mutually perpendicular axes, ensuring that all surfaces of the workpiece come into contact with the corrosive medium. This reduces long-term obstruction of the clamping area and dead zones in the spray, improving the uniformity and accuracy of the test results.

[0009] Furthermore, the box body is a cylindrical box body, the box cover is an upwardly convex arc-shaped cover, and the inner wall of the box cover is an arc surface that slopes downward from the center to the edge, so that the condensate on the inner wall of the box cover flows along the arc surface to the edge.

[0010] Furthermore, the separation assembly includes three separation frames, which are arranged at equal angles around the rotation center of the turntable to divide the test chamber into three independent chambers; the inner wall of the chamber is provided with side partitions corresponding to each of the separation frames, and the outer edge of the separation frame is provided with a sealing strip, and when the separation frame corresponds to the side partition, the sealing strip abuts against the side partition.

[0011] Its beneficial effects are as follows: the three partition frames are arranged at equal angles around the center of rotation of the turntable, dividing the test chamber into three independent chambers, which facilitates the setting of different test environments such as salt spray, drying, and corrosive gases. Side partitions are installed on the inner wall of the chamber, and sealing strips are installed on the outer edge of the partition frames. When the partition frame corresponds to the side partition, the sealing strip abuts against the side partition, which enhances the sealing effect between the partition frame and the inner wall of the chamber and reduces the cross-flow of gas and liquid between adjacent chambers.

[0012] Furthermore, the rotating clamping assembly also includes a transmission mechanism, which includes a transmission wheel arranged coaxially with the rotation shaft of the first rotating frame, a transmission gear meshing with the transmission wheel, a plurality of synchronous pulleys and a synchronous belt. The transmission gear is mounted on the rotation shaft of the second rotating frame, the synchronous pulleys are respectively mounted on the rotation shafts of each of the second rotating frames, and the synchronous belt connects adjacent synchronous pulleys, so that when the first rotating frame rotates, it drives each of the second rotating frames to rotate synchronously through the transmission wheel and the transmission gear.

[0013] Its beneficial effects are as follows: the transmission mechanism utilizes the rotation of the first rotating frame to drive the transmission wheel, which meshes with the transmission gear, and then drives each second rotating frame to rotate synchronously through the synchronous pulley and synchronous belt. In this way, only the first rotating frame needs to be driven to achieve the synchronous rotation of multiple second rotating frames, eliminating the need to set up a separate drive source for each second rotating frame, simplifying the structure and reducing the difficulty of arranging cables and drive components in salt spray environments.

[0014] Furthermore, the clamping mechanism includes a guide shaft, two clamping plates, and a clamping spring. The two clamping plates are slidably sleeved on the guide shaft, and the clamping spring is sleeved on the guide shaft and located on the side of the clamping plates away from the clamping side, for pushing the two clamping plates closer to each other to clamp the workpiece.

[0015] Furthermore, the clamping mechanism also includes an auxiliary plate, clamping blocks, a second guide shaft, and a centering spring. The auxiliary plate is fixed to the clamping side of the clamping plate, and the auxiliary plate is provided with a sliding groove. The second guide shaft is arranged along the length direction of the sliding groove. The two clamping blocks are slidably sleeved on the second guide shaft. The opposing sides of the two clamping blocks are provided with inclined surfaces that slope from the sliding end to the clamping end in a direction away from each other. The centering spring is sleeved on the second guide shaft and located on the side of the clamping block away from the other clamping block.

[0016] Furthermore, the upper surface of the turntable and the bottom surface of the inner cavity of the box are both conical surfaces that slope downward toward the outer edge of the box, and the side wall of the box is provided with a drain pipe corresponding to each of the independent cavities.

[0017] Its beneficial effects are as follows: the upper surface of the turntable and the bottom surface of the inner cavity of the chamber are both conical surfaces that slope downwards towards the outer edge of the chamber. This allows the liquid accumulated on the turntable and at the bottom of the chamber during the test to flow towards the outer edge of the chamber under the action of gravity and be discharged from the chamber through the drain pipes corresponding to each independent cavity. This reduces the accumulation of liquid in the chamber and avoids excessively high liquid levels that could affect the rotation of the turntable or cause cross-contamination between adjacent cavities.

[0018] Furthermore, an exhaust pipe is provided on the inner wall of the box corresponding to each of the independent cavities, and each exhaust pipe is connected to an external processing device; a sealing groove is provided at the opening of the box, and a partition block corresponding to each of the partition frames is provided in the sealing groove, and the partition block divides the sealing groove into multiple independent areas.

[0019] Its beneficial effect is that by setting a partition in the sealing groove to divide the sealing groove into multiple independent areas, the water seal areas corresponding to each cavity are independent of each other after the box cover is closed, reducing the possibility of crossflow between adjacent cavities through the sealing groove.

[0020] Furthermore, the bottom plate of the housing is provided with multiple bottom partitions, which are arranged around the circumference of the turntable. The upper end of the bottom partition abuts against the bottom surface of the turntable through a sealing strip to prevent gas and liquid between adjacent independent cavities from flowing through the space between the turntable and the bottom plate of the housing.

[0021] Furthermore, the inner wall of the box cover is provided with partitions corresponding to each of the partition frames and side partitions. When the box cover is closed, the lower end of the partition abuts against the top of the corresponding partition frame and side partition. The lower end of the partition is provided with a sealing strip to achieve sealing of each independent cavity. Attached Figure Description

[0022] The above and other objects, features, and advantages of exemplary embodiments of the present invention will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of the invention are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 A schematic diagram of the structure of a corrosion resistance testing device for aluminum alloy structural components provided by the present invention. Figure 1 ; Figure 2 A schematic diagram of the structure of a corrosion resistance testing device for aluminum alloy structural components provided by the present invention. Figure 2 ; Figure 3 A schematic diagram of the structure of a corrosion resistance testing device for aluminum alloy structural components provided by the present invention. Figure 3 ; Figure 4 A schematic diagram of the bottom structure of an aluminum alloy structural component corrosion resistance testing device provided by the present invention; Figure 5 This is a top view of a corrosion resistance testing device for aluminum alloy structural components provided by the present invention; Figure 6 This is a schematic diagram of the internal structure of the box; Figure 7 A cross-sectional view of a corrosion resistance testing device for aluminum alloy structural components provided by the present invention; Figure 8 This is a schematic diagram of the rotating clamping assembly. Figure 9 for Figure 8 A magnified view of a portion of point A in the middle; Figure 10 for Figure 8 A magnified view of a portion of point B in the middle.

[0023] Explanation of reference numerals in the attached figures: 1. Chamber; 2. Chamber lid; 3. Handle; 4. Support rod; 5. Turntable; 6. Central shaft; 8. Driven wheel; 9. Drive motor; 10. Drive wheel; 11. Transmission belt; 12. Support leg; 13. Sealing groove; 14. Partition block; 15. Partition frame; 16. Partition plate; 17. Partition groove; 19. Side partition plate; 20. Sealing strip; 21. Partition plate; 22. Bottom partition plate; 23. Drain pipe; 24. Exhaust pipe; 25. Drying test chamber; 26. Salt spray test chamber; 27. Sulfur dioxide test chamber; 28. Spray tower; 29. ​​Meter; 30. Brine tank; 31. Water inlet pipe; 32. Water outlet pipe; 33. Controller; 34. Air box; 35. Drying structure; 36. Air supply pipe; 37. Nozzle; 38. Rotary clamping assembly; 39. Support frame; 40. Rotary motor; 41. First rotating frame; 42. Second rotating frame; 43. Transmission mechanism; 44. Transmission wheel; 45. Transmission gear; 46. Synchronous pulley; 47. Synchronous belt; 48. Clamping mechanism; 49. Guide shaft; 50. Clamping plate; 51. Clamping spring; 52. Force application handle; 53. Auxiliary plate; 54. Clamping block; 56. Centering spring; 57. Slide groove. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0026] An embodiment of the corrosion resistance testing device for aluminum alloy structural components provided by the present invention: like Figures 1 to 10 As shown, a corrosion resistance testing device for aluminum alloy structural components includes a housing 1, a cover 2, a turntable 5, a partitioning assembly, an environmental control system, a rotating clamping assembly 38, and a controller 33. The housing 1 forms a testing chamber. The turntable 5 is rotatably positioned at the bottom of the chamber 1. The partitioning assembly divides the testing chamber into three independent chambers. The environmental control system provides different corrosion testing environments to each chamber. The rotating clamping assembly 38 clamps and drives the workpiece to rotate bidirectionally within each chamber. The controller 33 coordinates and controls the operation of each system. The following describes each component separately.

[0027] The housing 1 is a cylindrical structure with multiple support legs 12 at its bottom to support the entire device. A turntable 5 is rotatably mounted at the bottom of the inner cavity of the housing 1, and a central rotating shaft 6 extending vertically is fixed at the center of the turntable 5. The central rotating shaft 6 passes through a thrust bearing, which is fitted into a groove at the bottom of the housing 1, allowing the turntable 5 to rotate smoothly around the central rotating shaft 6. The lower end of the central rotating shaft 6 extends through the bottom plate of the housing 1 to the lower side of the housing 1, and a driven wheel 8 is fixedly mounted at its lower end. A drive motor 9 is fixedly mounted on the outer side wall of the housing 1. The output end of the drive motor 9 faces downwards and has a driving wheel 10. The driving wheel 10 and the driven wheel 8 are connected by a transmission belt 11, thereby driving the central rotating shaft 6 and the turntable 5 to rotate.

[0028] The lid 2 is an upwardly convex arc-shaped lid, hinged to the box body 1. A handle 3 is provided at the end of the lid 2 away from the hinge, facilitating opening and closing. A support rod 4 is provided at the hinge end of the lid 2; when the lid is opened, the support rod 4 abuts against the side wall of the box body 1 to support the lid 2 in the open position. The inner wall of the lid 2 is an arc surface sloping downwards from the center to the edge. During the test, condensate formed on the inner wall of the lid 2 can flow along the arc surface to the edge, preventing direct dripping onto the workpiece surface. A sealing groove 13 is provided at the opening of the box body 1 corresponding to the lid 2. The sealing groove 13 is used to store water; when the lid 2 is closed, it is immersed in water to form a water seal, achieving a seal between the inside and outside of the box body 1. Three partitions 14, arranged at equal angles, are provided within the sealing groove 13 corresponding to the three cavities, dividing the sealing groove 13 into three independent areas to prevent cross-flow between adjacent cavities through the sealing groove 13. Furthermore, a partition groove 17 is provided on the lid 2 corresponding to the three partitions 14 to avoid obstructing the partitions 14.

[0029] The partition assembly includes three partition frames 15 and partition plates 16 detachably inserted into the partition frames 15. The three partition frames 15 are arranged at equal angles of 120 degrees around the central axis 6, dividing the inner cavity of the housing 1 into three independent chambers, which in this embodiment are a drying test chamber 25, a salt spray test chamber 26, and a sulfur dioxide test chamber 27. The partition frame 15 is a hollow rectangular frame composed of multiple mutually perpendicular horizontal and vertical bars, with vertically extending slots inside. The partition plates 16 are detachably inserted into the slots; when inserted, they close the hollow holes of the partition frame 15, isolating adjacent chambers; when removed, they connect adjacent chambers, forming a composite test chamber. The top of the partition plate 16 has a protruding flange for easy disassembly by the operator.

[0030] The outer edge of the partition frame 15 matches the outer edge of the turntable 5. Three vertically extending side partitions 19 are provided on the inner wall of the housing 1 at equal angles of 120 degrees circumferentially. The height of the side partitions 19 is flush with the opening of the housing 1, and their inner edge diameter matches the outer edge diameter of the partition frame 15, thus achieving a seal between the three cavities. A vertically extending sealing strip 20 is provided on the outer edge of the partition frame 15. When the partition frame 15 corresponds to the side partitions 19, the sealing strip 20 abuts against the side partitions 19 to enhance the sealing effect. Three equally spaced partitions 21 are provided on the inner wall of the lid 2, corresponding to the three side partitions 19 and the partitions 16. When the lid 2 is closed, the upper end of the partition 21 connects to the inner wall of the lid 2, and the lower end abuts against the top of the corresponding side partitions 19 and partitions 16. A sealing strip 20 is also provided at the lower end of the partition 21, thereby achieving a seal between the three cavities at the top.

[0031] The bottom plate of the chamber 1 is also provided with bottom partitions 22 arranged at 120-degree intervals around the circumference. The upper end of the bottom partition 22 abuts against the bottom surface of the turntable 5 through a sealing strip 20 to prevent gas and liquid between adjacent chambers from flowing between the turntable 5 and the bottom plate of the chamber 1. The upper surface of the turntable 5 and the bottom surface of the inner cavity of the chamber 1 are both conical surfaces that slope downwards towards the outer edge of the chamber 1, allowing the liquid accumulated during the salt spray test to flow towards the outer edge of the bottom plate of the chamber 1 under the action of gravity. Drain pipes 23 are provided on the side wall of the bottom of the chamber 1 corresponding to the three chambers, allowing liquid to be discharged from the chamber 1 through the drain pipes 23. Exhaust pipes 24 are provided on the inner wall of the chamber 1 corresponding to the three chambers, and the exhaust pipes 24 are connected to external processing equipment to achieve independent exhaust of each chamber.

[0032] The environmental control system is described below. It includes a salt spray generating component, a drying component, and a gas generating component, which correspond to the salt spray test chamber 26, the drying test chamber 25, and the sulfur dioxide test chamber 27, respectively.

[0033] The salt spray testing chamber 26 contains a spray tower 28 and two meters 29. The spray tower 28 is fixedly mounted on the bottom plate of the housing 1 and located outside the turntable 5. The two meters 29 are fixedly mounted on the bottom plate of the housing 1 and located on the left and right sides of the spray tower 28. A brine tank 30 is provided on the outer wall of the housing 1 corresponding to the salt spray testing chamber 26. The brine tank 30 is equipped with an inlet pipe 31 and an outlet pipe 32. The outlet pipe 32 passes through the side wall of the housing 1 and connects to the spray tower 28. A controller 33 is also provided at the upper end of the brine tank 30. When the spray tower 28 is working, it atomizes the brine and sprays it into the salt spray testing chamber 26. The meters 29 are used to monitor the amount of salt spray deposition.

[0034] The drying test chamber 25 is equipped with an air box 34 for supplying hot air into the chamber. The outer wall of the chamber 1 is equipped with a drying structure 35 that communicates with the air box 34. The drying structure 35 generates hot air and sends it into the air box 34, which then sends it into the drying test chamber 25. In this embodiment, the drying structure 35 consists of a heating tube and a fan.

[0035] The sulfur dioxide testing chamber 27 is equipped with a gas supply pipe 36 fixed to the inner wall of the chamber 1. Multiple nozzles 37 are equidistantly arranged on the gas supply pipe 36. The gas supply pipe 36 passes through the inner wall of the chamber 1 and connects to an external gas supply device to deliver sulfur dioxide into the sulfur dioxide testing chamber 27. In other tests, other test gases can also be introduced into the gas supply pipe 36.

[0036] The rotary clamping assembly 38 is described below. There are three rotary clamping assemblies 38, each corresponding to one of the three cavities. Each rotary clamping assembly 38 is fixed at both ends to two adjacent partition frames 15, and includes a support frame 39, a transmission mechanism 43, a rotary motor 40, a first rotary frame 41, three second rotary frames 42, and a clamping mechanism 48.

[0037] Each rotating clamping assembly 38 includes two support frames 39, which are fixedly connected to two adjacent partition frames 15 within the cavity. A first rotating frame 41 is a rectangular frame rotatably mounted between the two support frames 39. One support frame 39 is equipped with a rotary motor 40 for driving the first rotating frame 41 to rotate. Three second rotating frames 42 are rotatably assembled within the first rotating frame 41 and are equidistantly arranged, with the rotation axis of each second rotating frame 42 perpendicular to the rotation axis of the first rotating frame 41.

[0038] The transmission mechanism 43 is used to realize the transmission connection between the first rotating frame 41 and the second rotating frame 42, and includes a transmission wheel 44, a transmission gear 45, four synchronous pulleys 46, and a synchronous belt 47. The transmission wheel 44 is fixed on one of the support frames 39 and is arranged coaxially with the rotation axis of the first rotating frame 41. The transmission wheel 44 is a face gear. The transmission gear 45 is rotatably mounted on the second rotating frame adjacent to the transmission wheel 44 and meshes with the transmission wheel 44. The four synchronous pulleys 46 are respectively mounted on the rotation axes of the three second rotating frames 42 and on the rotation axis coaxial with the transmission gear 45, and the transmission connection between adjacent synchronous pulleys 46 is realized through the three synchronous belts 47. When the first rotating frame 41 rotates, it drives the transmission gear 45 to rotate around the axis of the first rotating frame 41. The transmission gear 45 rotates under the action of the transmission wheel 44. The transmission gear 45 drives each second rotating frame 42 to rotate synchronously through the synchronous pulleys 46 and the synchronous belt 47, thereby realizing the linkage between each second rotating frame 42 and the first rotating frame 41.

[0039] The clamping mechanism 48 is described below. Each second rotating frame 42 has two clamping positions. Within the frame of each clamping position, two guide shafts 49, two clamping plates 50, and four clamping springs 51 are arranged in parallel. The two clamping plates 50 are slidably sleeved on both ends of the two guide shafts 49. Clamping springs 51 are sleeved on the guide shafts 49 on the opposite sides of the two clamping plates 50. The clamping springs 51 are used to push the two clamping plates 50 closer together to clamp the workpiece to be measured. Each clamping plate 50 is also provided with a force-applying handle 52 for the operator to apply force. The operator pulls the force-applying handle 52 to overcome the spring force and separate the clamping plates 50. After placing the workpiece, the operator releases the handle, and the clamping plates 50 clamp the workpiece under the action of the spring force.

[0040] Considering the limited applicability of the plate-shaped clamping plate 50, the clamping mechanism 48 also includes an auxiliary plate 53, clamping blocks 54, a second guide shaft, and a centering spring 56. The auxiliary plate 53 is fixed to the clamping side of the clamping plate 50 by screws. The auxiliary plate 53 has a groove 57 extending along its length, and a second guide shaft extending along the length of the groove 57 is located within the groove 57. Two clamping blocks 54 are fitted onto the second guide shaft, and each clamping block 54 has an inclined surface on its opposite side, sloping from the sliding end to the clamping end towards the opposite side. A centering spring 56 is fitted onto the second guide shaft on the opposite side of each clamping block 54 to push the two clamping blocks 54 closer together. The four clamping blocks 54 within the same frame cooperate to clamp cylindrical workpieces, and the inclined surfaces ensure automatic centering of the cylindrical workpiece after placement.

[0041] When using this device for testing, the operator selects whether to insert the partition plate 16 according to the testing requirements. If independent testing in multiple environments is required, the partition plate 16 is inserted into the slots of each partition frame 15 to isolate the three chambers from each other. The workpiece to be tested is clamped on the rotating clamping assembly 38 in each of the three chambers, and the environmental parameters and rotation program of each chamber are set by the controller 33. Salt spray test chamber 26 sprays salt spray through spray tower 28, hot air is introduced into drying test chamber 25 through air box 34, and sulfur dioxide test chamber 27 is introduced into sulfur dioxide gas through gas supply pipe 36. During the test, the rotary motor 40 drives the first rotating frame 41 to rotate around the first axis, and the first rotating frame 41 drives each second rotating frame 42 to rotate around the second axis through the transmission mechanism 43, so that the workpiece can rotate bidirectionally in the chamber, and each surface can come into contact with the corrosive medium. The turntable 5 can be driven to rotate by the drive motor 9, so that the three chambers correspond to the side partitions 19 on the inner wall of the box 1 to ensure the chamber is sealed. During the test, the condensate generated flows along the arc surface of the inner wall of the cover 2 to the edge, flows down the inner wall of the chamber 1, collects through the conical surface to the outer edge of the bottom plate of the chamber 1, and is discharged through the drain pipe 23. The gas in each chamber is discharged through its respective exhaust pipe 24 to maintain pressure balance.

[0042] For composite environment testing, the operator can pull one or more partition plates 16 out of the slot via the flange at the top of the partition plate 16, connecting adjacent cavities to form a composite test chamber. At this time, the environmental media in the adjacent cavities mix within the composite test chamber, creating a composite corrosion environment. After the test is completed, the partition plates 16 can be reinserted to restore the independent state of each cavity.

[0043] This device, through its detachable partition design, allows for independent testing in various corrosive environments, as well as testing in combined environments, all on a single unit without the need to change equipment or transfer samples. The rotating clamping assembly 38 allows the workpiece to rotate around two mutually perpendicular axes, reducing long-term obstruction of the clamping area and dead zones in the spray, thus improving the uniformity and accuracy of test results. The arc-shaped inner wall and conical bottom plate of the cover 2 facilitate the guidance and drainage of condensate and accumulated liquid, reducing liquid interference in the testing process. Each chamber has isolation and sealing structures in the circumferential, bottom, and top directions, reducing crossflow between adjacent chambers and improving the independence of environmental control in each chamber.

[0044] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0045] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A device for testing the corrosion resistance of aluminum alloy structural components, comprising a housing, a cover, and a controller, wherein a test chamber is formed within the housing, and a sealing structure is provided on the cover, characterized in that, Also includes: A turntable is rotatably mounted at the bottom of the inner cavity of the housing; The separation assembly includes multiple separation frames arranged circumferentially along the turntable and a separation plate detachably inserted into the separation frames. The separation frames divide the test chamber into multiple independent chambers. When the separation plate is inserted into the separation frame, it closes the communication between adjacent chambers. When the separation plate is removed, it connects the adjacent chambers to form a composite test chamber. An environmental control system includes at least two of a salt spray generating component, a drying component, and a gas generating component, each corresponding to an independent chamber, for providing different corrosion testing environments to the corresponding chambers; A rotating clamping assembly is disposed in each of the independent cavities, including a first rotating frame, a second rotating frame, and a clamping mechanism. The first rotating frame is rotatably mounted on the partition frame about a first axis, the second rotating frame is rotatably mounted inside the first rotating frame about a second axis perpendicular to the first axis, and the clamping mechanism is disposed on the second rotating frame for clamping the workpiece to be tested. The controller is electrically connected to both the environmental control system and the rotary clamping assembly.

2. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The box body is a cylindrical box body, the box cover is an upwardly convex arc-shaped cover, and the inner wall of the box cover is an arc surface that slopes downward from the center to the edge, so that the condensate on the inner wall of the box cover flows along the arc surface to the edge.

3. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The separation assembly includes three separation frames, which are arranged at equal angles around the rotation center of the turntable to divide the test chamber into three independent chambers. The inner wall of the chamber is provided with side partitions corresponding to each of the separation frames, and the outer edge of the separation frame is provided with a sealing strip. When the separation frame corresponds to the side partition, the sealing strip abuts against the side partition.

4. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The rotating clamping assembly further includes a transmission mechanism, which includes a transmission wheel arranged coaxially with the rotation shaft of the first rotating frame, a transmission gear meshing with the transmission wheel, a plurality of synchronous pulleys and a synchronous belt. The transmission gear is mounted on the rotation shaft of the second rotating frame, and the synchronous pulleys are respectively mounted on the rotation shafts of each of the second rotating frames. The synchronous belt connects adjacent synchronous pulleys, so that when the first rotating frame rotates, it drives each of the second rotating frames to rotate synchronously through the transmission wheel and the transmission gear.

5. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The clamping mechanism includes a guide shaft, two clamping plates and a clamping spring. The two clamping plates are slidably sleeved on the guide shaft, and the clamping spring is sleeved on the guide shaft and located on the side of the clamping plates away from the clamping side.

6. The corrosion resistance testing device for aluminum alloy structural components according to claim 5, characterized in that, The clamping mechanism further includes an auxiliary plate, clamping blocks, a second guide shaft, and a centering spring. The auxiliary plate is fixed to the clamping side of the clamping plate and has a sliding groove. The second guide shaft is arranged along the length of the sliding groove. The two clamping blocks are slidably sleeved on the second guide shaft. The opposing sides of the two clamping blocks have inclined surfaces that slope from the sliding end to the clamping end in a direction away from each other. The centering spring is sleeved on the second guide shaft and located on the side of the clamping block away from the other clamping block, and is used to push the two clamping plates closer to each other to clamp the workpiece.

7. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The upper surface of the turntable and the bottom surface of the inner cavity of the box are both conical surfaces that slope downward toward the outer edge of the box. Drainage pipes are provided on the side wall of the box corresponding to each of the independent cavities.

8. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The inner wall of the box is provided with exhaust pipes corresponding to each of the independent cavities, and each exhaust pipe is connected to an external processing device; the opening of the box is provided with a sealing groove, and the sealing groove is provided with a partition block corresponding to each of the partitions, and the partition block divides the sealing groove into multiple independent areas.

9. The corrosion resistance testing device for aluminum alloy structural components according to claim 1, characterized in that, The bottom plate of the housing is provided with multiple bottom partitions, which are arranged around the circumference of the turntable. The upper end of the bottom partition abuts against the bottom surface of the turntable through a sealing strip to prevent gas and liquid between adjacent independent cavities from flowing through the space between the turntable and the bottom plate of the housing.

10. A device for testing the corrosion resistance of aluminum alloy structural components according to any one of claims 1 to 9, characterized in that, The inner wall of the box cover is provided with partitions corresponding to each of the partition frames and side partitions. When the box cover is closed, the lower end of the partition abuts against the top of the corresponding partition frame and side partition. The lower end of the partition is provided with a sealing strip to achieve sealing of each independent cavity.

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