Accelerated corrosion test device and test method for vehicle body test cabin

Abstract

The invention discloses a vehicle body test cabin accelerated corrosion test device and test method, and belongs to the field of vehicle body corrosion tests. An accelerated corrosion test device for a vehicle body test chamber comprises three test boxes, and further comprises two fixing blocks symmetrically and fixedly arranged in the test boxes; the detection groove is formed in the fixed block; the vehicle body plate is arranged in the detection groove; the fixing assembly is arranged in the detection groove, and the fixing assembly is used for limiting a vehicle body plate; the limiting rod is fixedly arranged between the two fixing blocks; the threaded sleeve is arranged on the limiting rod in a sliding manner; the friction assembly is fixedly arranged on the side, close to the vehicle body plate, of the threaded sleeve; according to the method, the influence on the corrosion of the vehicle body plate under different conditions is judged through the three groups of difference values, so that a rapid corrosion test is effectively carried out on the vehicle body, and meanwhile, the vehicle body corrosion rate is effectively increased.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body corrosion testing, and in particular to an accelerated corrosion testing device and a testing method for a vehicle body test chamber. Background Art

[0002] During the manufacturing of automobiles, strict requirements are placed on the steel material of the automobile body, and steel with good corrosion resistance is required. However, due to various processing processes during automobile manufacturing, the performance of the automobile body may change, so corrosion tests are required on the automobile body, and then the body test chamber accelerated corrosion test device is required for detection; At present, when conducting accelerated corrosion tests on metals, acidic corrosion solutions are generally used to corrode the metal surface, and finally the test data is obtained by weighing, and the rate of the corrosion test is increased by increasing the concentration of the acidic solution; In the prior art, when an accelerated corrosion test is performed on a vehicle body, the use of an acidic solution for corrosion will cause the corrosion residue to adhere to the surface of the vehicle body, which may affect the corrosion effect of the acidic solution. In addition, when weighing, the corrosion residue may contain moisture, which may affect the efficiency of the accelerated corrosion test. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a vehicle body test chamber accelerated corrosion test device that can overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A vehicle body test chamber accelerated corrosion test device comprises: three test chambers, and also comprises: two fixed blocks symmetrically fixedly arranged in the test chambers; a detection slot arranged on the fixed blocks; a vehicle body panel arranged in the detection slot; a fixed assembly arranged in the detection slot, and the fixed assembly is used to limit the vehicle body panel; a limit rod fixedly arranged between the two fixed blocks; a threaded sleeve slidably arranged on the limit rod; a friction assembly fixedly arranged on a side of the threaded sleeve close to the vehicle body panel; a first driving assembly used to drive the threaded sleeve to slide back and forth on the limit rod; a water spray assembly arranged on one of the fixed blocks, and the water spray assembly is used to spray water onto the vehicle body panel; a sealing cover sealed and clamped on the test chamber.

[0005] In order to facilitate the fixation of the vehicle body panel, preferably, the fixing assembly includes a pressure plate rotatably arranged in the detection groove, the side of the pressure plate away from the detection groove is fixedly connected to a limiting plate, and a first gap is arranged between the pressure plate and the bottom of the detection groove, and the vehicle body panel is arranged in the first gap.

[0006] In order to facilitate the corrosion of the vehicle body panel, preferably, the water spray assembly includes a pump group fixedly arranged at the bottom of the test box, the output end of the pump group is provided with a first water pipe, and the input end of the pump group is connected with the bottom of the test box, and the fixed block is provided with a water spray pipe matching the vehicle body panel, and the end of the water spray pipe away from the outlet is connected with the first water pipe.

[0007] In order to facilitate driving the threaded sleeve to move back and forth, preferably, the first driving assembly includes an impeller chamber arranged in a fixed block close to one side of the first water pipe, a screw is rotatably arranged between the two fixed blocks, one end of the screw is sealed and rotated in the impeller chamber, one end of the screw in the impeller chamber is fixedly connected to the impeller group, the end of the first water pipe away from the pump group is connected to the input end of the impeller chamber, a first connecting pipe connected to the output end of the impeller chamber is arranged in the fixed block, and the end of the first connecting pipe away from the impeller chamber is connected to the water spray pipe.

[0008] In order to facilitate the friction of the vehicle body panel, preferably, the friction assembly includes a friction column fixedly arranged on the side of the threaded sleeve close to the vehicle body panel, the friction column is arranged in a cylindrical shape, and the water spraying end of the water spraying pipe matches the friction column.

[0009] In order to facilitate filtering of corrosion residues, preferably, a screen is fixedly connected between the bottoms of the two fixed blocks, impurity boxes are symmetrically arranged at both ends of the screen, and a scraper is fixedly connected to one end of the threaded sleeve close to the screen, and the scraper matches the screen.

[0010] In order to facilitate the limiting of the pressure plate, preferably, a first slide groove is arranged in the fixed block close to the side of the water spray pipe, and the first slide groove matches the pressure plate, a first slide rod is sealed and slidably arranged in the first slide groove, a spring is fixedly connected between the first slide rod and the bottom of the first slide groove, and a capillary tube connected to the first slide groove is arranged on the first slide rod, and a second connecting pipe is arranged between the bottom of the first slide groove and the water spray pipe.

[0011] In order to facilitate the knocking of the vehicle body panel, preferably, a first cavity is provided in the fixed block away from the first water pipe, a first rotating shaft is rotatably provided in the fixed block, one end of the first rotating shaft in the first cavity is fixedly connected to a cam, one end of the screw rod away from the impeller cavity is fixedly connected to a first gear, and one end of the first rotating shaft away from the cam is fixedly connected to a second gear matching the first gear.

[0012] In order to facilitate the control of the test time, preferably, a control cylinder is fixedly connected to the sealing cover, a fixed plate is fixedly connected inside the control cylinder, a second control plate is fixedly connected to the fixed plate, a floating rod is slidably arranged inside the control cylinder, a first control plate matching the second control plate is fixedly connected to the top of the floating rod, a plurality of equidistantly arranged water inlets are provided at the bottom of the control cylinder, and exhaust ports matching the floating rods are symmetrically provided on both sides of the control cylinder.

[0013] A method for accelerating corrosion testing of a vehicle body test chamber mainly comprises the following steps: Step 1: Use external sandpaper to rub off the paint on the surfaces of three body panels, weigh the body panels, and add corrosion solutions of different concentrations into three test boxes; Step 2: Place three vehicle body panels into three testing slots respectively; Step 3, fixing the vehicle body panel by means of a fixing assembly; Step 4: spray water onto the bottom surface of the body panel through the water spray assembly, and at the same time, the first driving assembly drives the threaded sleeve to slide back and forth, so that the friction assembly rubs the lower surface of the body panel; Step 5: After the test is completed, wipe the water off the surface of the body panel and weigh it. Compare the weight with the initial weight to determine the corrosion effect.

[0014] Compared with the prior art, the present invention provides a vehicle body test chamber accelerated corrosion test device, which has the following beneficial effects: 1. The accelerated corrosion test device of the vehicle body test chamber drives the threaded sleeve to make reciprocating motion through the screw rod, and the threaded sleeve drives the friction column to rub along the surface of the vehicle body panel. When the surface of the vehicle body panel is corroded, it will expand slightly, and the corrosion residue will be rubbed off by the friction column, thereby effectively removing the residue on the surface of the vehicle body panel. After the test is completed for the same time, the water on the vehicle body panel is wiped dry and weighed, and the difference is compared with the data before the test. The influence of the corrosion of the vehicle body panel under different conditions is judged by three sets of difference values, thereby effectively conducting a rapid corrosion test on the vehicle body.

[0015] 2. The vehicle body test chamber accelerates the corrosion test device, and the sprayed water column collides with the friction column, so that the water droplets splash evenly onto the lower surface of the vehicle body panel, thereby effectively improving the corrosion efficiency of the vehicle body panel.

[0016] 3. The accelerated corrosion test device of the vehicle body test chamber continuously contacts and rubs the vehicle body panel through the friction column, and the friction generates heat to increase the temperature of the vehicle body panel, which effectively increases the corrosion effect of the acid solution on the vehicle body panel, and thus effectively increases the corrosion rate of the vehicle body.

[0017] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention uses three sets of differences to judge the impact on the corrosion of the vehicle body panels under different conditions, thereby effectively conducting a rapid corrosion test on the vehicle body and effectively increasing the corrosion rate of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic cross-sectional view of an accelerated corrosion test device for a vehicle body test chamber proposed by the present invention; Figure 2 A top view of an accelerated corrosion test device for a vehicle body test chamber proposed by the present invention; Figure 3 A top view of a test box of a vehicle body test chamber accelerated corrosion test device proposed by the present invention; Figure 4 A cross-sectional schematic diagram of a test box of a vehicle body test chamber accelerated corrosion test device proposed by the present invention; Figure 5 The invention provides a vehicle body test chamber accelerated corrosion test device Figure 1 The enlarged schematic diagram of point A in the middle; Figure 6 The invention provides a vehicle body test chamber accelerated corrosion test device Figure 4 The enlarged schematic diagram of point B in the middle; Figure 7 The invention provides a vehicle body test chamber accelerated corrosion test device Figure 4 The enlarged schematic diagram of the center C; Figure 8 The invention provides a vehicle body test chamber accelerated corrosion test device Figure 4 Enlarged schematic diagram of point D in the middle.

[0019] In the figure: 1, test box; 101, pump group; 102, first water pipe; 103, sealing cover; 2, fixing block; 201, impeller chamber; 202, impeller group; 203, screw rod; 204, first connecting pipe; 205, water spray pipe; 206, second connecting pipe; 207, first gear; 208, first rotating shaft; 209, second gear; 210, cam; 211, first cavity; 3, detection slot; 301, pressure plate; 302, limit plate; 303, first slide groove; 304, first slide rod; 305, capillary; 306, spring; 4, threaded sleeve; 401, friction column; 402, scraper; 403, limit rod; 5, screen; 501, impurity box; 6, body plate; 7, control cylinder; 701, water inlet; 702, exhaust port; 703, floating rod; 704, fixed plate; 705, first control plate; 706, second control plate. Implementation

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] Example 1: Reference Figure 1-Figure 8 A vehicle body test chamber accelerated corrosion test device comprises: three test chambers 1, and also comprises: two fixed blocks 2, symmetrically fixedly arranged in the test chamber 1; a detection slot 3, arranged on the fixed block 2; a vehicle body plate 6, arranged in the detection slot 3; a fixed component, arranged in the detection slot 3, and the fixed component is used to limit the vehicle body plate 6; a limit rod 403, fixedly arranged between the two fixed blocks 2; a threaded sleeve 4, slidably arranged on the limit rod 403; a friction component, fixedly arranged on the side of the threaded sleeve 4 close to the vehicle body plate 6; a first driving component for driving the threaded sleeve 4 to slide back and forth on the limit rod 403; a water spray component, arranged on one of the fixed blocks 2, and the water spray component is used to spray water onto the vehicle body plate 6; a sealing cover 103, sealingly clamped on the test chamber 1.

[0023] The fixing assembly includes a pressure plate 301 rotatably disposed in the detection slot 3, a side of the pressure plate 301 away from the detection slot 3 is fixedly connected to a limiting plate 302, and a first gap is provided between the pressure plate 301 and the bottom of the detection slot 3, and the vehicle body panel 6 is provided in the first gap.

[0024] The water spray assembly includes a pump group 101 fixedly arranged at the bottom of the test box 1, a first water pipe 102 is arranged at the output end of the pump group 101, and the input end of the pump group 101 is connected to the bottom of the test box 1, a water spray pipe 205 matching the vehicle body panel 6 is arranged on the fixed block 2, and the end of the water spray pipe 205 away from the outlet is connected to the first water pipe 102.

[0025] The first driving assembly includes an impeller chamber 201 arranged in a fixed block 2 on a side close to the first water pipe 102, a screw rod 203 is rotatably arranged between the two fixed blocks 2, one end of the screw rod 203 is sealed and rotated in the impeller chamber 201, one end of the screw rod 203 in the impeller chamber 201 is fixedly connected to the impeller group 202, one end of the first water pipe 102 away from the pump group 101 is connected to the input end of the impeller chamber 201, a first connecting pipe 204 connected to the output end of the impeller chamber 201 is arranged in the fixed block 2, and one end of the first connecting pipe 204 away from the impeller chamber 201 is connected to the water spray pipe 205.

[0026] The friction assembly includes a friction column 401 fixedly arranged on a side of the threaded sleeve 4 close to the vehicle body plate 6 . The friction column 401 is arranged in a cylindrical shape, and the water spraying end of the water spraying pipe 205 matches the friction column 401 .

[0027] When the vehicle body is subjected to an accelerated corrosion test, the flat surface of the same position of the vehicle body is cut into three square vehicle body panels 6, one side of the vehicle body panel 6 is polished with sandpaper to completely remove the surface paint, and the three square vehicle body panels 6 are weighed and recorded with an external electronic scale, and acidic corrosion solutions of different concentrations are poured into the test box 1, and then the three vehicle body panels 6 are respectively placed in the detection slots 3 in the three test boxes 1, and the pressing plate 301 is rotated to press the pressing plate 301 on the upper surface of the vehicle body panel 6. When placing the vehicle body panel 6, the polished side is facing downward, and finally the sealing cover 103 is snapped onto the test box 1; When the vehicle body panel 6 is subjected to rapid corrosion testing, the pump group 101 is turned on, and the pump group 101 extracts water in the test box 1, and delivers it to the impeller chamber 201 through the first water pipe 102, and then flows to the first connecting pipe 204 and the water spray pipe 205 in sequence, and is sprayed to the lower surface of the vehicle body panel 6 through the water spray pipe 205 for wet corrosion; When the water in the first water pipe 102 passes through the impeller chamber 201, the impeller assembly 202 causes the screw 203 to rotate, and the screw 203 drives the threaded sleeve 4 to make a reciprocating motion, and the threaded sleeve 4 drives the friction column 401 to rub along the surface of the body plate 6. When the surface of the body plate 6 is corroded, it will expand slightly, and the corrosion residue will be rubbed off by the friction column 401, thereby effectively removing the residue on the surface of the body plate 6. After the test is completed for the same time, the water on the body plate 6 is wiped dry and weighed, and the difference is compared with the data before the test. The influence of the corrosion of the body plate 6 under different conditions is judged by three sets of difference values, thereby effectively performing a rapid corrosion test on the body; When the water in the water spray pipe 205 is sprayed out, the sprayed water column collides with the friction column 401, so that the water droplets splash evenly onto the lower surface of the vehicle body panel 6, thereby effectively improving the corrosion efficiency of the vehicle body panel 6; The friction column 401 is in constant contact and friction with the vehicle body panel 6 , and the friction generates heat to increase the temperature of the vehicle body panel 6 , thereby effectively increasing the corrosion effect of the acid solution on the vehicle body panel 6 , and further effectively increasing the corrosion rate of the vehicle body.

[0028] Example 2: Reference Figure 1-Figure 8 , a vehicle body test chamber accelerated corrosion test device, which is basically the same as Example 1, further, a screen 5 is fixedly connected between the bottoms of the two fixed blocks 2, impurity boxes 501 are symmetrically arranged at both ends of the screen 5, and a scraper 402 is fixedly connected to one end of the threaded sleeve 4 close to the screen 5, and the scraper 402 matches the screen 5.

[0029] A first slide groove 303 is arranged in the fixed block 2 near the side of the water spray pipe 205, and the first slide groove 303 matches the pressure plate 301, a first slide rod 304 is sealed and slidably arranged in the first slide groove 303, a spring 306 is fixedly connected between the first slide rod 304 and the bottom of the first slide groove 303, and a capillary 305 connected to the first slide groove 303 is arranged on the first slide rod 304, and a second connecting pipe 206 is arranged between the bottom of the first slide groove 303 and the water spray pipe 205.

[0030] After the friction column 401 rubs off the corroded residue on the vehicle body panel 6, the water column sprayed from the water spray pipe 205 washes the residue to the bottom of the test box 1. At this time, the residue is filtered through the screen 5, effectively preventing the residue from affecting the pumping effect of the pump group 101. When the water in the first connecting pipe 204 is filled into the water spray pipe 205, the water enters the first slide groove 303 through the second connecting pipe 206, causing the first slide bar 304 to slide out. At this time, the first slide bar 304 limits the pressure plate 301, effectively preventing the vehicle body panel 6 from shaking, thereby effectively improving the friction effect of the friction column 401.

[0031] Example 3: Reference Figure 1-Figure 8 , a vehicle body test chamber accelerated corrosion test device, which is basically the same as Example 1, and further, a first cavity 211 is arranged in the fixed block 2 away from the first water pipe 102, a first rotating shaft 208 is rotatably arranged in the fixed block 2, one end of the first rotating shaft 208 in the first cavity 211 is fixedly connected to a cam 210, one end of the screw rod 203 away from the impeller chamber 201 is fixedly connected to a first gear 207, and one end of the first rotating shaft 208 away from the cam 210 is fixedly connected to a second gear 209 matching the first gear 207.

[0032] When the screw rod 203 rotates, the screw rod 203 drives the first gear 207 to rotate, the first gear 207 drives the first rotating shaft 208 to rotate through the second gear 209, the first rotating shaft 208 drives the cam 210 to rotate, and the cam 210 pushes the body panel 6 to knock, causing the body panel 6 to vibrate slightly, accelerating the flow rate of water droplets on the body panel 6, thereby effectively improving the efficiency of the rapid corrosion test on the body.

[0033] Example 4: Reference Figure 1-Figure 8 , a vehicle body test chamber accelerated corrosion test device, which is basically the same as Example 1, and further, a control cylinder 7 is fixedly connected to the sealing cover 103, a fixing plate 704 is fixedly connected inside the control cylinder 7, a second control plate 706 is fixedly connected to the fixing plate 704, a floating rod 703 is slidably arranged inside the control cylinder 7, a first control plate 705 matching the second control plate 706 is fixedly connected to the top of the floating rod 703, a plurality of equidistantly arranged water inlets 701 are arranged at the bottom of the control cylinder 7, and exhaust ports 702 matching the floating rod 703 are symmetrically arranged on both sides of the control cylinder 7.

[0034] When water fills into the first chute 303, water sprays out from the capillary 305 onto the pressure plate 301, causing the water level on the pressure plate 301 to gradually rise, effectively limiting the pressure plate 301. When the water level gradually rises, the floating rod 703 gradually rises. When the first control plate 705 contacts the second control plate 706, the pump group 101 pumps water in the reverse direction to pump out the water on the pressure plate 301, and the test is stopped after the water is pumped out.

[0035] It should be noted that the diameter of the capillary tube 305 is one tenth of the diameter of the water spray pipe 205 .

[0036] Embodiment 5: A method for accelerating corrosion testing of a vehicle body test chamber, mainly comprising the following steps: Step 1: Use external sandpaper to rub off the paint on the surfaces of the three vehicle body panels 6, weigh the vehicle body panels 6, and add corrosion solutions of different concentrations into the three test boxes 1; Step 2: Place three vehicle body panels 6 into three testing slots 3 respectively; Step 3: Fix the vehicle body panel 6 by means of a fixing assembly; Step 4: spray water onto the bottom surface of the vehicle body panel 6 through the water spray assembly, and at the same time, the first driving assembly drives the threaded sleeve 4 to slide back and forth, so that the friction assembly rubs the lower surface of the vehicle body panel 6; Step 5: After the test is completed, wipe the water off the surface of the vehicle body panel 6 and weigh it. The corrosion effect is determined by comparing the weight with the initial weight.

[0037] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vehicle body test chamber accelerated corrosion test device, comprising: Three test boxes (1), characterized in that they also include: Two fixed blocks (2) are symmetrically fixedly arranged in the test box (1); A detection slot (3) arranged on the fixed block (2); A vehicle body plate (6) disposed in the detection slot (3); A fixing component, arranged in the detection slot (3), and used to limit the position of the vehicle body panel (6); A limiting rod (403) fixedly disposed between the two fixing blocks (2); A threaded sleeve (4) slidably disposed on the limiting rod (403); A friction assembly, fixedly arranged on a side of the threaded sleeve (4) close to the vehicle body plate (6); A first driving component for driving the threaded sleeve (4) to slide reciprocatingly on the limiting rod (403); a water spray assembly, arranged on one of the fixing blocks (2), and used for spraying water onto the vehicle body panel (6); A sealing cover (103) is sealingly clamped on the test box (1).

2. The vehicle body test chamber accelerated corrosion test device according to claim 1, characterized in that: The fixing assembly comprises a pressing plate (301) rotatably arranged in the detection slot (3), a side of the pressing plate (301) away from the detection slot (3) being fixedly connected to a limiting plate (302), and a first gap is arranged between the pressing plate (301) and the bottom of the detection slot (3), and the vehicle body plate (6) is arranged in the first gap.

3. The accelerated corrosion test device for a vehicle body test chamber according to claim 1, characterized in that: The water spray assembly comprises a pump group (101) fixedly arranged at the bottom of the test box (1); the output end of the pump group (101) is provided with a first water pipe (102), and the input end of the pump group (101) is connected to the bottom of the test box (1); the fixed block (2) is provided with a water spray pipe (205) matching the vehicle body panel (6); and the end of the water spray pipe (205) away from the outlet is connected to the first water pipe (102).

4. The vehicle body test chamber accelerated corrosion test device according to claim 3, characterized in that: The first driving assembly comprises an impeller chamber (201) arranged in a fixed block (2) on a side close to the first water pipe (102); a screw rod (203) is rotatably arranged between the two fixed blocks (2); one end of the screw rod (203) is sealed and rotatable in the impeller chamber (201); one end of the screw rod (203) in the impeller chamber (201) is fixedly connected to the impeller assembly (202); one end of the first water pipe (102) away from the pump assembly (101) is connected to the input end of the impeller chamber (201); a first connecting pipe (204) in communication with the output end of the impeller chamber (201) is arranged in the fixed block (2); and one end of the first connecting pipe (204) away from the impeller chamber (201) is connected to the water spray pipe (205).

5. The accelerated corrosion test device for a vehicle body test chamber according to claim 3, characterized in that: The friction assembly comprises a friction column (401) fixedly arranged on a side of the threaded sleeve (4) close to the vehicle body plate (6); the friction column (401) is arranged in a cylindrical shape, and the water spraying end of the water spraying pipe (205) matches the friction column (401).

6. The vehicle body test chamber accelerated corrosion test device according to claim 1, characterized in that: A screen (5) is fixedly connected between the bottoms of the two fixed blocks (2), impurity boxes (501) are symmetrically arranged at both ends of the screen (5), and a scraper (402) is fixedly connected to one end of the threaded sleeve (4) close to the screen (5), and the scraper (402) matches the screen (5).

7. The vehicle body test chamber accelerated corrosion test device according to claim 4, characterized in that: A first slide groove (303) is arranged in the fixed block (2) near the water spray pipe (205), and the first slide groove (303) matches the pressure plate (301), a first slide rod (304) is sealed and slidable in the first slide groove (303), a spring (306) is fixedly connected between the first slide rod (304) and the bottom of the first slide groove (303), and a capillary tube (305) connected to the first slide groove (303) is arranged on the first slide rod (304), and a second connecting tube (206) is arranged between the bottom of the first slide groove (303) and the water spray pipe (205).

8. The vehicle body test chamber accelerated corrosion test device according to claim 4, characterized in that: A first cavity (211) is arranged in the fixed block (2) away from the first water pipe (102), a first rotating shaft (208) is rotatably arranged in the fixed block (2), one end of the first rotating shaft (208) in the first cavity (211) is fixedly connected to a cam (210), one end of the screw rod (203) away from the impeller cavity (201) is fixedly connected to a first gear (207), and one end of the first rotating shaft (208) away from the cam (210) is fixedly connected to a second gear (209) matching the first gear (207).

9. The vehicle body test chamber accelerated corrosion test device according to claim 7, characterized in that: The sealing cover (103) is fixedly connected to a control cylinder (7), a fixing plate (704) is fixedly connected inside the control cylinder (7), a second control plate (706) is fixedly connected to the fixing plate (704), a floating rod (703) is slidably arranged inside the control cylinder (7), a first control plate (705) matching the second control plate (706) is fixedly connected to the top of the floating rod (703), a plurality of water inlets (701) arranged at equal distances are arranged at the bottom of the control cylinder (7), and exhaust ports (702) matching the floating rod (703) are symmetrically arranged on both sides of the control cylinder (7).

10. A vehicle body test chamber accelerated corrosion test method, using the vehicle body test chamber accelerated corrosion test device according to claim 1, characterized in that: The main steps include: Step 1: rub off the paint on the surfaces of the three vehicle body panels (6) with external sandpaper, weigh the vehicle body panels (6), and add corrosion solutions of different concentrations into the three test boxes (1); Step 2: placing three vehicle body panels (6) into three testing slots (3) respectively; Step 3: fixing the vehicle body panel (6) by means of a fixing assembly; Step 4: spraying water onto the bottom surface of the vehicle body panel (6) through the water spray assembly, while the first driving assembly drives the threaded sleeve (4) to slide back and forth, so that the friction assembly rubs the bottom surface of the vehicle body panel (6); Step 5: After the test is completed, wipe the water off the surface of the vehicle body panel (6), weigh it, and compare the weight with the initial weight to determine the corrosion effect.

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