Corrosion resistance testing device for aluminum alloy vehicle body structural member

Abstract

The invention relates to the field of metal detection, in particular to an aluminum alloy vehicle body structural member corrosion resistance testing device which comprises a box body and a box door. The box body is rotationally connected with a box door; the device further comprises an air cylinder, a housing I, a housing II and the like. The box body is fixedly connected with a plurality of cylinders; the telescopic end of each air cylinder is fixedly connected with a housing I; the box body is fixedly connected with a plurality of housings II, and when the housings II and the housings I are embedded, the housings II and the housings I jointly form a closed shell. After detection is completed, the housing I moves towards the side close to the housing II again, the housing I and the housing II form a closed space, then the external water pump is controlled to be started, high-pressure clear water is conveyed to the hollow pipe through the connecting pipe, and finally the clear water is sprayed out of the spray head to clean the closed space formed by the housing I and the housing II. As the spray head is obliquely arranged, the clean water drives the hollow pipe to rotate under the action of water flow pushing force when sprayed out of the spray head, the spray head sprays the clean water to the periphery, and the cleaning effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of metal detection, and particularly to a device for testing the corrosion resistance of an aluminum alloy body structure member. Background Art

[0002] During high-speed driving, sand and gravel are lifted by the wheels and splash onto the surface of the vehicle body or structural members at a relatively high speed and kinetic energy. These sand and gravel particles will cause abrasion to the coating surface, and the hardness of the sand and gravel particles is relatively high, making it easy to leave fine scratches on the coating surface. These scratches may become the starting point of corrosion. Especially in a humid or salt spray environment, moisture and corrosive substances are likely to penetrate into the interior of the coating, accelerating the corrosion of the base material.

[0003] Currently, for the detection of the corrosion resistance of automotive structural members, it mainly relies on simulated tests in a laboratory environment and actual road tests. The existing simulated detection methods usually conduct salt spray tests or damp heat cycle tests in the laboratory, and it is difficult to simulate the combined damage effect of sand and gravel splashing during the corrosion process. The simulation device has a single function and insufficient control accuracy, making it difficult to meet the requirements for comprehensively evaluating the corrosion resistance of structural members. Summary of the Invention

[0004] In order to overcome the shortcoming that the existing detection methods are difficult to simulate the combined damage effect of sand and gravel splashing during the corrosion process, the present invention provides a device for testing the corrosion resistance of an aluminum alloy body structure member.

[0005] The technical solution is as follows: A device for testing the corrosion resistance of an aluminum alloy body structure member includes a box body and a box door; the box body is rotatably connected with the box door; it further includes cylinders, housing Ⅰ, housing Ⅱ, a water inlet pipe, a water outlet pipe, and a scratch assembly; several cylinders are fixedly connected to the box body; a housing Ⅰ is fixedly connected to the telescopic end of each cylinder; two elastic plates Ⅰ are fixedly connected to each housing Ⅰ; several housing Ⅱ are fixedly connected to the box body, and when the housing Ⅱ is fitted with the housing Ⅰ, they jointly form a sealed housing; two elastic plates Ⅱ are fixedly connected to each housing Ⅱ; a water inlet pipe is fixedly connected to each housing Ⅱ; several water outlet pipes are fixedly connected to each housing Ⅱ; a scratch assembly for scratching the anti-collision beam is provided on each housing Ⅰ.

[0006] As a further preferred solution, the scratch assembly includes an electric guide rail, a moving block, a fixing plate, a poking rod, an electric push rod, a rubber sheet and a slider; each housing I is fixedly connected with an electric guide rail; each electric guide rail is slidably connected with a moving block; each moving block is fixedly connected with an electric push rod, and the electric push rod is inclined; the telescopic end of each electric push rod is fixedly connected with a fixing plate, and the fixing plate is located inside the housing I; each fixing plate is fixedly connected with a plurality of poking rods; each housing I is provided with a chute; each housing I is slidably connected with a slider, and the slider is slidably connected with the telescopic end of the electric push rod, and the slider is located in the chute; a rubber sheet is arranged in each chute to seal the gap between the slider and the chute.

[0007] As a further preferred solution, the fixing plate and the poking rod are detachably connected.

[0008] As a further preferred solution, it further includes a connecting pipe, a hollow pipe and a nozzle; each slider is fixedly connected with a connecting pipe; each fixing plate is rotatably connected with a hollow pipe, and the hollow pipe is communicated with the connecting pipe; each hollow pipe is fixedly connected with a plurality of nozzles arranged obliquely.

[0009] As a further preferred solution, it further includes a collection box; a plurality of collection boxes are fixedly connected inside the box body, and the collection boxes are located directly below both ends of the anti-collision beam.

[0010] As a further preferred solution, anhydrous copper sulfate particles are placed in the collection box.

[0011] As a further preferred solution, it further includes a transparent plate; the box body is fixedly connected with the transparent plate.

[0012] As a further preferred solution, it further includes a round pipe; the box body is fixedly connected with the round pipe.

[0013] As a further preferred solution, the box body and the box door are made of heat-insulating materials.

[0014] As a further preferred solution, a temperature sensor and a humidity sensor are arranged inside the box body.

[0015] The present invention has the following advantages: The present invention wraps and seals the detection part of the anti-collision beam through the closed space composed of the housing I and the housing II, so that the poking rod makes a scratch on the anti-collision beam, and then makes a scratch when the anti-collision beam is immersed in salt water, improving the accuracy of the corrosion detection of the anti-collision beam, and avoiding the problem that in the prior art, after the anti-collision beam needs to be scratched outside first, the aluminum alloy anti-collision beam 3 is quickly oxidized by the outside air to form a new oxide film again, resulting in inaccurate simulation experiments.

[0016] To make the detection structure fit the actual environment more accurately, muddy water can also be introduced into the enclosed space formed by the housing I and the housing II through the water inlet pipe, so that the anti-collision beam is immersed in the muddy water to detect its corrosion resistance.

[0017] After the detection is completed, pure water is transported to the hollow tube through the connecting pipe. Finally, the pure water sprays out from the nozzle. Under the reaction force of the water flow, the hollow tube is driven to rotate, and then the nozzle sprays pure water in all directions. At the same time, the electric guide rail makes the moving block drive the hollow tube to move within the housing I and the housing II, further improving the cleaning effect and preventing the residue of the corrosive liquid.

[0018] By arranging collection boxes made of anti-corrosion materials directly below both ends of the anti-collision beam to collect the corrosive liquid flowing out from both ends of the anti-collision beam, and anhydrous copper sulfate particles are placed in the collection boxes. When the corrosive liquid flows down from both ends of the anti-collision beam into the collection boxes and contacts the anhydrous copper sulfate particles, a color change reaction occurs to the anhydrous copper sulfate. The anhydrous copper sulfate turns blue after contacting water, which is convenient for personnel to find that the anti-collision beam has been corroded through. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal structure of the box disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention;

[0021] Figure 3 It is a cross-sectional view of the box disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention;

[0022] Figure 4 It is a schematic diagram of a partial structure of the first combination of the anti-collision beam, the housing I, and the housing II disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention;

[0023] Figure 5 It is a schematic diagram of a partial structure of the second combination of the anti-collision beam, the housing I, and the housing II disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention;

[0024] Figure 6 It is a schematic diagram of a partial internal structure of the housing I disclosed for the anti-corrosion performance testing device of the aluminum alloy body structural member of the present invention.

[0025] Wherein: 1 - box body, 2 - box door, 3 - anti-collision beam, 105 - cylinder, 106 - housing Ⅰ, 108 - housing Ⅱ, 109 - water inlet pipe, 1010 - water outlet pipe, 1011 - electric guide rail, 1012 - moving block, 1013 - fixing plate, 1015 - punching rod, 1016 - connecting pipe, 1017 - electric push rod, 1018 - hollow pipe, 1019 - nozzle, 1020 - rubber sheet, 1021 - slider, 201 - collection box, 202 - transparent plate, 203 - round pipe, 1061 - elastic plate Ⅰ, 1081 - elastic plate Ⅱ, 1062 - chute. Specific embodiments

[0026] The present invention will be further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installation, connection, and coupling should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Embodiment 1

[0028] An anti-corrosion performance testing device for an aluminum alloy body structure member, as Figures 1-6 shown, includes a box body 1 and a box door 2; the box body 1 is rotatably connected with the box door 2;

[0029] It also includes a cylinder 105, a housing Ⅰ 106, a housing Ⅱ 108, a water inlet pipe 109, a water outlet pipe 1010 and a scratch assembly; two cylinders 105 are bolted to the box body 1; a housing Ⅰ 106 is fixedly connected to the telescopic end of each cylinder 105; two elastic plates Ⅰ 1061 are fixedly connected to each housing Ⅰ 106; two housing Ⅱ 108 are bolted to the box body 1, and when the housing Ⅱ 108 is fitted with the housing Ⅰ 106, they jointly form a sealed housing; two elastic plates Ⅱ 1081 are fixedly connected to each housing Ⅱ 108; a water inlet pipe 109 is fixedly connected to each housing Ⅱ 108; two water outlet pipes 1010 are fixedly connected to each housing Ⅱ 108; a scratch assembly for making scratches on the anti-collision beam 3 is provided on each housing Ⅰ 106.

[0030] The scratch component includes an electric guide rail 1011, a moving block 1012, a fixing plate 1013, a poking rod 1015, an electric push rod 1017, a rubber sheet 1020 and a slider 1021; an electric guide rail 1011 is fixedly connected to the outside of each housing I 106; a moving block 1012 is slidably connected to each electric guide rail 1011; an electric push rod 1017 is fixedly connected to each moving block 1012, and the electric push rod 1017 is inclined; a fixing plate 1013 is fixedly connected to the telescopic end of each electric push rod 1017, and the fixing plate 1013 is located inside the housing I 106; a number of poking rods 1015 are fixedly connected to each fixing plate 1013; a chute 1062 is provided in each housing I 106; a slider 1021 is slidably connected to each housing I 106, and the slider 1021 is slidably connected to the telescopic end of the electric push rod 1017, and the slider 1021 is located in the chute 1062; a rubber sheet 1020 is arranged in each chute 1062 to block the gap between the slider 1021 and the chute 1062 through the rubber sheet 1020.

[0031] The fixing plate 1013 is detachably connected to the poking rod 1015. The poking rod 1015 will be severely worn during the contact with the anti-collision beam 3. By the detachable connection between the fixing plate 1013 and the poking rod 1015, it is convenient to replace the worn poking rod 1015.

[0032] It further includes a connecting pipe 1016, a hollow pipe 1018 and a nozzle 1019; a connecting pipe 1016 is fixedly connected to each slider 1021; a hollow pipe 1018 is rotatably connected to each fixing plate 1013, and the hollow pipe 1018 is communicated with the connecting pipe 1016; a number of inclined nozzles 1019 are fixedly connected to each hollow pipe 1018.

[0033] Taking the simulated corrosion liquid as brine as an example, during use, the water outlet of the external circulation pump is connected to the water inlet pipe 109, the water inlet of the circulation pump is connected to the water outlet pipe 1010, and the connecting pipe 1016 is connected to the water outlet of the external water pump. The simulated corrosion liquid flows in the external circulation pump, and pure water is in the external water pump.

[0034] Initially, the housing Ⅰ106 and the housing Ⅱ108 are in a separated state. First, control the cylinder 105 to drive the housing Ⅰ106 to move to one side away from the housing Ⅱ108. Then, manually open the box door 2, place the anti-collision beam 3 to be detected in the housing Ⅱ108. Next, control the cylinder 105 to drive the housing Ⅰ106 to move, so that the housing Ⅰ106 and the housing Ⅱ108 move towards each other until they are completely fitted. After the elastic plate Ⅰ1061 and the elastic plate Ⅱ1081 contact the anti-collision beam 3, they are compressed under their respective elastic forces, sealing the enclosed space formed by the housing Ⅰ106 and the housing Ⅱ108. At this time, the enclosed space formed by the housing Ⅰ106 and the housing Ⅱ108 tightly wraps and clamps the anti-collision beam 3, as Figure 2 shown. Then close the box door 2. At this time, the anti-collision beam 3 is placed with the curved arc facing downwards.

[0035] Next, control the circulation pump to start, inject brine into the detection space formed by the housing Ⅰ106 and the housing Ⅱ108 through the water inlet pipe 109 until the anti-collision beam 3 is immersed in the brine in the housing Ⅰ106, and suction is applied to the water outlet pipe 1010 through the water inlet of the circulation pump, so that the brine is discharged from the water outlet pipe 1010, and the brine circulates in the enclosed space formed by the housing Ⅰ106 and the housing Ⅱ108 for corrosion detection;

[0036] When performing corrosion detection on the anti-collision beam 3, lines need to be drawn on the surface of the anti-collision beam 3 to penetrate the paint layer to reach the substrate to detect the corrosion resistance of the base metal. Therefore, after the housing Ⅰ106 and the housing Ⅱ108 wrap the anti-collision beam 3, first control the electric push rod 1017 to drive the fixed plate 1013 and the punching rod 1015 to move obliquely towards the side close to the anti-collision beam 3, so that the anti-collision beam 3 contacts the punching rod 1015. At this time, control the electric guide rail 1011 to make the moving block 1012 drive the fixed plate 1013 and the punching rod 1015 to slide. The electric push rod 1017 drives the slider 1021 to slide in the chute 1062, and the slider 1021 stretches or squeezes the rubber sheet 1020. The rubber sheet 1020 undergoes adaptive deformation under its own elastic force, thereby sealing the enclosed space formed by the housing Ⅰ106 and the housing Ⅱ108, so that the punching rod 1015 draws lines on the anti-collision beam 3, and then scratches are made when the anti-collision beam 3 is immersed in the brine, improving the accuracy of corrosion detection of the anti-collision beam 3. After the anti-collision beam 3 has scratches, the aluminum alloy anti-collision beam 3 is quickly oxidized by the external air to form a new oxide film, resulting in inaccurate simulation experiments.

[0037] To make the detection structure fit the actual environment more accurately, mud water can also be introduced into the enclosed space formed by the housing Ⅰ106 and the housing Ⅱ108 through the water inlet pipe 109 to simulate the corrosion resistance of the anti-collision beam 3 immersed in mud water.

[0038] After a certain period of time, the circulation pump is turned off, and the wastewater in the housing I 106 and the housing II 108 is drained. Then, the cylinder 105 is controlled to drive the housing I 106 to move, so that the housing I 106 is separated from the anti-collision beam 3 and the housing II 108. At this time, the box door 2 is manually opened, and the anti-collision beam 3 is taken out from the housing II 108 to observe the corrosion condition of the surface of the anti-collision beam 3.

[0039] When it is necessary to clean the space inside the housing I 106 and the housing II 108, the housing I 106 is moved again to the side closer to the housing II 108, so that the housing I 106 and the housing II 108 form a closed space. Subsequently, the external water pump is controlled to start, and high-pressure pure water is conveyed to the hollow tube 1018 through the connecting pipe 1016. Finally, the pure water sprays out from the nozzle 1019, and then the closed space formed by the housing I 106 and the housing II 108 is cleaned. Since the nozzle 1019 is inclined, when the pure water sprays out from the nozzle 1019, the hollow tube 1018 is driven to rotate under the reaction force of the water flow, so that the nozzle 1019 sprays pure water in all directions. At the same time, the electric guide rail 1011 makes the moving block 1012 drive the hollow tube 1018 to move inside the housing I 106 and the housing II 108, further improving the cleaning effect and preventing the residue of the corrosive liquid.

[0040] Embodiment 2

[0041] On the basis of Embodiment 1, as Figures 2-3 shown, it further includes a collection box 201; two anti-corrosion material collection boxes 201 are fixedly connected inside the box body 1, and the collection box 201 is located directly below both ends of the anti-collision beam 3.

[0042] Anhydrous copper sulfate particles are placed in the collection box 201. When corrosive liquid flows down from both ends of the anti-collision beam 3 into the collection box 201 and contacts the anhydrous copper sulfate particles, the anhydrous copper sulfate particles produce a color change reaction. Anhydrous copper sulfate turns blue after contacting water, which is convenient for personnel to find that the anti-collision beam 3 has been corroded through.

[0043] It further includes a transparent plate 202; the box body 1 is fixedly connected with a transparent plate 202.

[0044] It further includes a round tube 203; the box body 1 is fixedly connected with a round tube 203, and a pump for controlling the temperature is externally connected to the round tube 203.

[0045] The box body 1 and the box door 2 are made of heat-insulating materials.

[0046] A temperature sensor and a humidity sensor are arranged inside the box body 1, and the temperature and humidity inside the box body 1 are monitored through the temperature sensor and the humidity sensor for timely adjustment.

[0047] When the anti-collision beam 3 is corroded and penetrated by corrosive liquid, the corrosive liquid flows out from both ends of the anti-collision beam 3 through the inside of the curved anti-collision beam 3. If the flowing corrosive liquid directly drops into the box body 1, it will cause damage to the box body 1. Therefore, by arranging the collection box 201 made of anti-corrosion material directly below both ends of the anti-collision beam 3, the corrosive liquid flowing out from both ends of the anti-collision beam 3 is collected.

[0048] By setting the observation window of the transparent plate 202, it is convenient for manual observation of the detection situation of the anti-collision beam 3 through the transparent plate 202, so as to adjust the simulation experiment in time.

[0049] Since the vehicle will be used in a low-temperature or high-temperature environment, it is necessary to detect the corrosion resistance of the anti-collision beam 3 at low temperature or high temperature. Control the external pump to transport low-temperature or high-temperature gas into the box body 1 through the round pipe 203, so that the anti-collision beam 3 in the box body 1 is in a low-temperature or high-temperature environment, and then simulate the corrosion in different temperature environments to improve the detection diversity. And because the box body 1 and the box door 2 are made of heat-insulating materials, it is avoided that the external temperature environment affects the closed environment in the box body 1.

[0050] The technical principle of the embodiments of the present invention has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the embodiments of the present invention and cannot be construed in any way as a limitation on the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation manners of the embodiments of the present invention without creative labor, and these manners will fall within the protection scope of the embodiments of the present invention.

Claims

1. A corrosion resistance testing device for aluminum alloy vehicle body structural parts, comprising a box body (1) and a box door (2); the box body (1) is rotatably connected to the box door (2); the characteristics are: It also includes a cylinder (105), a cover shell I (106), a cover shell II (108), a water inlet pipe (109), a water outlet pipe (1010) and a scratching assembly; the box body (1) is fixedly connected to a plurality of cylinders (105); the telescopic end of each cylinder (105) is fixedly connected to a cover shell I (106); each cover shell I (106) is fixedly connected to two elastic plates I (1061); the box body (1) is fixedly connected to a plurality of cover shells II (108) , and the cover shell II (108) and the cover shell I (106) together form a closed shell when they are engaged; each cover shell II (108) is fixedly connected to two elastic plates II (1081); each cover shell II (108) is fixedly connected to a water inlet pipe (109); each cover shell II (108) is fixedly connected to a plurality of water outlet pipes (1010); and each cover shell I (106) is provided with a scratching component for scratching the anti-collision beam (3).

2. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 1 is characterized in that: The scratching assembly comprises an electric guide rail (1011), a moving block (1012), a fixed plate (1013), a poking rod (1015), an electric push rod (1017), a rubber sheet (1020) and a sliding block (1021); each cover shell I (106) is fixedly connected to an electric guide rail (1011); each electric guide rail (1011) is slidably connected to a moving block (1012); each moving block (1012) is fixedly connected to an electric push rod (1017), and the electric push rod (1017) is arranged in an inclined manner; the telescopic end of each electric push rod (1017) is fixedly connected to a fixed plate (1013). The fixing plate (1013) is located inside the cover shell I (106); each fixing plate (1013) is fixedly connected to a plurality of poking rods (1015); each cover shell I (106) is provided with a slide groove (1062); each cover shell I (106) is slidably connected to a slider (1021), and the slider (1021) is slidably connected to the telescopic end of the electric push rod (1017), and the slider (1021) is located in the slide groove (1062); a rubber sheet (1020) is provided in each slide groove (1062), and a gap between the slider (1021) and the slide groove (1062) is blocked by the rubber sheet (1020).

3. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 2 is characterized in that: The fixing plate (1013) is detachably connected to the poking rod (1015).

4. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 2, characterized in that: It also includes a connecting tube (1016), a hollow tube (1018) and a nozzle (1019); each slider (1021) is fixedly connected to a connecting tube (1016); each fixed plate (1013) is rotatably connected to a hollow tube (1018), and the hollow tube (1018) is connected to the connecting tube (1016); each hollow tube (1018) is fixedly connected to a plurality of nozzles (1019) arranged in an inclined manner.

5. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 1, characterized in that: It also includes a collection box (201); a plurality of collection boxes (201) are fixedly connected inside the box body (1), and the collection boxes (201) are located directly below the two ends of the anti-collision beam (3).

6. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 5, characterized in that: Anhydrous copper sulfate particles are placed in the collection box (201).

7. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 1, characterized in that: It also includes a transparent plate (202); the box body (1) is fixedly connected with the transparent plate (202).

8. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 1, characterized in that: It also includes a round tube (203); the box body (1) is fixedly connected with the round tube (203).

9. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 8, characterized in that: The box body (1) and the box door (2) are made of heat-insulating material.

10. The corrosion resistance testing device for aluminum alloy vehicle body structural parts according to claim 8, characterized in that: A temperature sensor and a humidity sensor are arranged in the box (1).

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