Corrosion resistance test equipment for skylight cross beam

Abstract

The invention discloses corrosion resistance test equipment for a skylight cross beam, relates to the technical field of cross beam tests, and aims to solve the technical problems that a corrosion test of a static placement cross beam sample cannot reflect the influence of dynamic stress on corrosion cracks in the cross beam, and particularly whether stress corrosion cracking can be caused in a salt spray environment or not. Comprising a salt spray testing machine, the salt spray testing machine comprises a test box body, a plurality of test rack assemblies are arranged in an inner cavity of the test box body, each test rack assembly comprises a static test rack and a dynamic test rack, each dynamic test rack comprises a rhombic movable rack, and each rhombic movable rack comprises an upper pressing block, a lower falling block, two symmetrically-arranged bearing blocks and four movable rods. A jolting pressing assembly is arranged at the bottom of the upper pressing block. The device has the advantages that the cross beam sample is in a dynamic stress state in a salt spray corrosion test, the stress condition of the cross beam in actual use is truly simulated, and the test environment is highly close to the actual working condition.

Description

Technical Field

[0001] The invention relates to the technical field of crossbeam testing, and more particularly to a corrosion resistance testing device for a skylight crossbeam. Background Art

[0002] The sunroof crossbeam is an important part of the vehicle body structure. The sunroof opening will weaken the overall strength of the roof. The crossbeam connects the left and right side panels (such as the A / B / C pillars) horizontally to compensate for the loss of structural rigidity due to the sunroof opening, prevent the body from twisting and deforming, and improve the vehicle's torsion resistance. In coastal areas, the unique climate and geographical environment pose a severe challenge to the durability of automobiles, with the sunroof beams of cars being the first to be affected. The air here is filled with a large amount of salt-containing water vapor, with the salt content of more than 1 mg per cubic meter of air. In addition, the humidity is high and rainfall is frequent. These water vapors are easily adsorbed on the surface of the car and continue to corrode the sunroof beams. Over time, the beams will suffer from salt corrosion, causing rust on the surface, and in severe cases, the structural strength will decrease. To ensure the reliability of the sunroof beams in such harsh environments, corrosion resistance tests are required. With the help of a salt spray tester to simulate the high salt spray environment along the coast, the beams are subjected to long-term sedimentation of salt spray of a certain concentration to evaluate their corrosion resistance.

[0003] The salt spray test machine atomizes a certain concentration of salt water and allows the salt spray to settle on the surface of the skylight beam sample, simulating the high salt spray environment in the coastal area, and conducts corrosion tests on the samples to evaluate their corrosion resistance. However, in traditional tests, skylight beam samples are usually placed statically on the sample rack for testing. In actual use, the skylight beam needs to continuously withstand the pressure of automotive components and is affected by vehicle movement, wind load and vibration, and is in a dynamic stress state. This dynamic stress will accelerate the initiation and expansion of corrosion cracks inside the material, especially in a salt spray environment, which may cause stress corrosion cracking. Static tests can only simulate uniform corrosion or pitting, which cannot reflect this key factor and may underestimate the risk of failure in actual use. In view of this, we propose a corrosion resistance test equipment for skylight beams. Summary of the invention

[0004] The purpose of the present invention is to provide a corrosion resistance test equipment for skylight beams to solve the technical problem that the corrosion test of statically placed beam samples cannot reflect the influence of dynamic stress on the corrosion cracks inside the beams, especially whether stress corrosion cracking can be induced in a salt spray environment.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a corrosion resistance test equipment for skylight crossbeams, comprising a salt spray test machine, the salt spray test machine comprising a test box, a plurality of test frame assemblies are arranged in the inner cavity of the test box, the test frame assemblies include a static test frame and a dynamic test frame; wherein the dynamic test frame comprises a rhombus movable frame, the rhombus movable frame is a frame body with a rhombus structure, the rhombus movable frame comprises an upper pressing block, a falling block, two symmetrically arranged supporting blocks and four movable rods, the upper pressing block is movably connected to the supporting block through the movable rod, and the falling block is movably connected to the supporting block through another movable rod; A plurality of plug posts are arranged on the top of the support block, and the plug posts are used to be inserted into the plug holes of the beam sample to fix the beam sample. The two support blocks are used to fix the two ends of the beam sample. The diamond-shaped movable frame can apply tensile force or extrusion force to the two ends of the beam sample, so that during the salt spray corrosion test of the beam sample in the test box, the beam sample can withstand the action of different forces and coordinate the test with the salt spray. A bump pressure component is arranged at the bottom of the upper pressure block, and the bump pressure component can apply continuous downward pressure to the top of the beam sample, and can perform bump impact on the top of the beam sample, simulating the impact force generated by the bumps on the beam sample during the driving of the car.

[0006] Preferably, the dynamic test frame also includes an adjustment bracket, which includes a bottom plate arranged at the bottom of the inner cavity of the test box, and the top of the bottom plate is connected to four sliding rods, two fixed frames and multiple fixed seats; the four sliding rods are arranged in four corners, and the static test frame is movably arranged on the top of the sliding rods, and the top of the static test frame is used to place the beam sample; the two fixed frames are arranged in a symmetrical structure, and a worm is rotatably connected between every two fixed seats, and there are two worms, and the two worms are arranged in a symmetrical structure.

[0007] Preferably, the dynamic test frame also includes a double-groove synchronous wheel rotatably arranged on the outer side wall of the test box, the double-groove synchronous wheel is coaxially connected to a handwheel, and the double-groove synchronous wheel is respectively connected to a first synchronous wheel and a second synchronous wheel through a plurality of synchronous belts; the first synchronous wheel is coaxially connected to the worm, and the second synchronous wheel is coaxially connected to the other worm.

[0008] Preferably, a screw is rotatably arranged on the fixed frame, a worm wheel is connected at the lower end of the screw, and the worm wheel is meshingly connected to the worm; a plurality of base columns are connected to the top of the fixed frame, a sliding column is connected to the top of the base column, a limiting block is connected to the top of the sliding column, a movable push block is slidingly sleeved on the sliding column, the screw passes through the top of the movable push block and cooperates with the inner cavity thread of the movable push block.

[0009] Preferably, the top of the upper pressure block is integrally formed with a movable pressure frame movably mounted on the four sliding rods, and the bottom of the lower sinker block is integrally formed with a movable drop frame movably mounted on the four sliding rods. The top of the movable pressure frame is provided with a plurality of counterweight grooves, and a plurality of fixed columns are arranged in the counterweight grooves. A plurality of counterweight plates are movably inserted on the fixed columns, and the top of the movable drop frame is provided with a counterweight groove with the same structure as that of the top of the movable pressure frame; the movable pressure frame is provided with a plurality of movable channels from top to bottom, the screw rod is arranged in the movable channel, and the screw rod is clearance-matched with the inner wall of the movable channel, and the movable push block is arranged below the movable channel.

[0010] Preferably, the bump pressure assembly includes two connecting frames detachably connected to the bottom of the upper pressure block, the side walls of the connecting frames are provided with sliding channels, a pressure cylinder is arranged between the two connecting frames, the side walls of the pressure cylinder are connected with sliding blocks, the sliding blocks are movably arranged in the sliding channels, the pressure cylinder is movably cooperated with the sliding channel through the sliding blocks, and the pressure cylinder is used to press down on the top of the beam sample to apply continuous downward pressure on the top of the beam sample to simulate the downward pressure that the beam sample is actually subjected to.

[0011] Preferably, a motor is arranged in the inner cavity of the pressing cylinder, and the output end of the motor is connected to the first bevel gear, and the output ends of the first bevel gear are respectively meshed with the second bevel gear and the third bevel gear; the second bevel gear is coaxially connected to the first rotating plate, and the third bevel gear is coaxially connected to the second rotating plate, and the first rotating plate and the second rotating plate are symmetrically arranged on the outer side of the pressing cylinder.

[0012] Preferably, a wheel chamber is formed in the side wall of the first rotating plate, an arc-shaped groove is formed in the other side wall of the first rotating plate, a driving column is movably arranged in the arc-shaped groove, a wheel plate is rotatably connected to the circumferential outer wall of the driving column, and the wheel plate is arranged in the wheel chamber; the second rotating plate is provided with the same structural components as those on the first rotating plate.

[0013] Preferably, the side wall of the pressing cylinder is integrally formed with a recessed frame, and the first rotating plate is rotatably arranged inside the recessed frame; the inner side wall of the recessed frame is connected with a fixed cylinder, and the inner cavity of the fixed cylinder is gap-matched with the rotating shaft of the first rotating plate; the circumferential outer wall of the fixed cylinder is connected with two fixed ring plates, and the circumferential outer wall of the fixed cylinder is rotatably arranged with a rotating plate, and the rotating plate is arranged between the two fixed ring plates; the circumferential outer wall of the rotating plate is integrally formed with a push-pull plate, and the side wall of the push-pull plate is provided with a movable groove, and one end of the driving column is movably arranged in the movable groove.

[0014] Preferably, the circumferential outer wall of the rotating plate is connected to a plurality of inclined plates, a sleeve is arranged between every two of the inclined plates, a roller is rotatably arranged on the circumferential inner wall of the sleeve, and the side wall of the sleeve is connected to the side wall of the inclined plate through a plurality of springs; the circumferential outer wall of the fixed ring plate is connected to a plurality of arc-shaped protrusions, and the roller is arranged between every two of the arc-shaped protrusions.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can simulate the actual working condition of the beam sample by designing a diamond-shaped movable frame and a bump pressure component. In actual application, the beam sample will be subjected to various complex forces, such as tensile force, extrusion force and downward pressure on the top. During the salt spray corrosion test of the beam sample in the test box, the diamond-shaped movable frame can alternately convert the tensile force and the extrusion force on both ends of the beam sample, and the bump pressure component can apply continuous downward pressure to the top of the beam sample, so that the beam sample is in a dynamic stress state in the salt spray corrosion test, and the stress condition of the beam in actual use is truly simulated, so that the test environment is highly close to the actual working condition, thereby ensuring that the corrosion test results can accurately reflect the performance of the beam in the actual scene, and solves the problem that the corrosion test of the static placement of the beam sample cannot reflect the influence of dynamic stress on the corrosion cracks inside the beam, especially whether stress corrosion cracking can be induced in the salt spray environment.

[0016] 2. The present invention also designs the diamond movable frame into a diamond structure and utilizes the deformable characteristics of the diamond structure to enable it to simulate the tensile force and extrusion force at both ends of the beam sample through simple mechanical movement, that is, the up and down movement of the movable push block. When the movable push block moves upward and the movable pendant frame is suspended in the air, the diamond movable frame is longitudinally stretched and the supporting block squeezes the two ends of the beam sample; when the movable push block moves downward and the movable pressure frame is pressed downward, the diamond movable frame expands laterally and the supporting block stretches the two ends of the beam sample; this flexible force simulation highly restores the complex mechanical state that the skylight beam may withstand in actual use, and provides conditions for the test that are closer to real working conditions.

[0017] 3. The diamond-shaped movable frame designed in the present invention utilizes the symmetry of its diamond-shaped structure to make the force more uniform during the transmission process. When a tensile force or a compressive force is applied to the beam sample, two symmetrically arranged supporting blocks can act on both ends of the beam sample with a relatively balanced force, avoiding deviation in the test results due to uneven force, thus ensuring the accuracy and reliability of the test data and facilitating a more accurate evaluation of the performance of the beam.

[0018] 4. The present invention designs a bump pressure component and utilizes a motor to drive the bevel gear to rotate the rotating plate, so that the wheel plate squeezes the top of the beam sample, causing the pressure cylinder to continuously move up and down, resulting in repeated bump impacts on the beam sample. This highly simulates the impact of road bumps on the sunroof beam during driving, so that the test results can better reflect the performance of the beam in actual use and expose potential quality problems, such as the initiation of corrosion cracks. It can not only reflect the corrosion resistance of the beam, but also simultaneously test the reliability of its structure under the dual effects of external force impact and salt spray corrosion.

[0019] 5. The present invention also designs the first rotating plate and the second rotating plate to be symmetrical structures and rotate in opposite directions. The two wheel plates squeeze the top of the beam sample in a mutually extruding manner, so that the pressing cylinder produces a bumpy impact. This design ensures that the up and down bumping motion of the pressing cylinder is relatively stable and reduces the deviation. The stable bumping can make the impact force on the beam sample more uniform and accurate, reduce the test error caused by unstable motion, and thus improve the accuracy and reliability of the test results.

[0020] 6. In the present invention, when the motor drives the first rotating plate to rotate forward, the wheel plate follows and performs forward circular motion, and the driving column drives the rotating plate to rotate. Since the roller column is pressed against the outer wall of the fixed ring plate by the spring tension, the arc-shaped protrusion increases the rolling resistance, and the driving column slides in the arc-shaped groove by the reaction force, so that the length of the wheel plate protruding from the bottom of the first rotating plate is shortened. When the motor drives the first rotating plate to rotate in the opposite direction, similarly, the length of the wheel plate protruding from the bottom of the first rotating plate becomes longer. The change in the protruding length of the wheel plate directly affects the amplitude of the pressure cylinder moving up and down at the top of the beam sample. The longer the length, the greater the amplitude of moving up and down, and the stronger the bumping impact strength of the beam sample; the shorter the length, the weaker the bumping impact strength, thereby realizing the flexible adjustment of the bumping impact strength. The bumping impact of a single intensity is solved, and it is impossible to simulate the diversified bumping strengths that the beam bears when the car is driving under different road conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the test box of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the test stand assembly of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the dynamic test stand of the present invention.

[0025] Figure 5 The figure is a schematic diagram of the force of the dynamic test stand of the present invention in a usage state.

[0026] Figure 6 It is a force diagram of another use state of the dynamic test stand of the present invention.

[0027] Figure 7 for Figure 3 A schematic diagram of the enlarged structure in the middle.

[0028] Figure 8 It is a schematic diagram of the structure of the adjusting bracket of the present invention.

[0029] Fig. 9 It is a schematic diagram of the structure of the diamond-shaped movable frame of the present invention.

[0030] Fig.10 It is a schematic diagram of the structure of the bump pressure component of the present invention.

[0031] Fig.11 It is a schematic diagram of the cross-sectional structure of the pressure cylinder of the bump pressure assembly of the present invention.

[0032] Fig.12 It is a schematic diagram of the disassembled structure of the bump pressure component of the present invention.

[0033] Fig.13 It is a schematic diagram of the wheel plate motion trajectory of the present invention.

[0034] Fig.14 It is a schematic diagram of the structure of the fixed ring plate and the rotating plate of the present invention.

[0035] Fig.15 It is a schematic diagram of the split structure of the fixed ring plate and the fixed cylinder of the present invention.

[0036] Description of the numbers in the figure: 1. Salt spray test machine; 2. Test box; 3. Test frame assembly; 4. Static test frame; 5. Dynamic test frame; 6. Beam sample; 51. Diamond-shaped movable frame; 52. Adjustment bracket; 53. Bump pressure component; 501, upper pressure block; 502, sinking block; 503, supporting block; 504, movable rod; 505, double-groove synchronous wheel; 506, hand wheel; 507, synchronous belt; 508, first synchronous wheel; 509, second synchronous wheel; 510, movable pressure frame; 511, movable sinking frame; 512, fixed column; 513, counterweight plate; 514, movable channel; 5031, plug-in column; 5201, bottom plate; 5202, slide bar; 5203, fixed frame; 5204, fixed seat; 5205, worm; 5206, lead screw; 5207, worm wheel; 5208, bottom column; 5209, slide column; 5210, limit block; 5211, movable push block; 5301, connecting frame; 5302, sliding channel; 5303, pressing cylinder; 5304, sliding block; 5305, motor; 5306, first bevel gear; 5307, second bevel gear; 5308, first rotating plate; 5309, second rotating plate; 5310, wheel chamber; 5311, arc groove; 5312, driving column; 5313, wheel plate; 5314, recessed frame; 5315, fixed cylinder; 5316, fixed ring plate; 5317, rotating plate; 5318, push-pull plate; 5319, movable groove; 5320, inclined plate; 5321, sleeve; 5322, roller column; 5323, spring; 5324, arc convex block. DETAILED DESCRIPTION

[0037] Embodiment 1 like Figures 1 to 15 As shown, this embodiment provides a corrosion resistance test equipment for a skylight beam, including a salt spray test machine 1. The salt spray test machine 1 is the prior art in the example and is not described in detail. The salt spray test machine 1 includes a test box 2. A plurality of test frame assemblies 3 are arranged in the inner cavity of the test box 2. The test frame assemblies 3 include a static test frame 4 and a dynamic test frame 5.

[0038] In an embodiment of the present invention, the static test frame 4 is a frame structure, and the top of the static test frame 4 is used to place the beam sample 6, so that the beam sample 6 remains in a stable placement state. By starting the salt spray generating device of the salt spray tester 1, the test box 2 is filled with a certain concentration of salt spray, and the salt spray settles on the surface of the beam sample 6, and a static corrosion resistance test is performed on the beam sample 6.

[0039] In an embodiment of the present invention, the dynamic test frame 5 includes a diamond-shaped movable frame 51, which is a frame body with a diamond structure. The diamond-shaped movable frame 51 includes an upper pressure block 501, a sinking block 502, two symmetrically arranged supporting blocks 503 and four movable rods 504. The upper pressure block 501 and the supporting block 503 are movably connected through the movable rod 504, and the sinking block 502 and the supporting block 503 are movably connected through another movable rod 504; a plurality of plug posts 5031 are arranged on the top of the supporting block 503, and the plug posts 5031 are used to be inserted into the socket of the beam sample 6 to fix the beam sample 6. This fixing method can adapt to different specifications and sizes. The crossbeam sample 6 of inches improves the versatility and applicability of the test device. The two supporting blocks 503 are used to fix the two ends of the crossbeam sample 6; the diamond-shaped movable frame 51 can apply tensile force or extrusion force to the two ends of the crossbeam sample 6, so that the crossbeam sample 6 can withstand the action of different forces and coordinate the test with the salt spray during the salt spray corrosion test in the test box 2; a bump pressure component 53 is arranged at the bottom of the upper pressure block 501, and the bump pressure component 53 can apply continuous downward pressure to the top of the crossbeam sample 6, and can perform a bump impact on the top of the crossbeam sample 6, simulating the impact force of the bump on the crossbeam sample 6 caused by the driving of the car.

[0040] The present invention can simulate the actual working condition of the beam sample 6 by designing a diamond-shaped movable frame 51 and a bump pressure component 53 with a diamond structure. In actual application, the beam sample 6 will be subjected to various complex forces, such as tensile force, extrusion force and downward pressure on the top. During the salt spray corrosion test of the beam sample 6 in the test box 2, the diamond-shaped movable frame 51 can alternately convert the tensile force and the extrusion force on the two ends of the beam sample 6, and the bump pressure component 53 can apply continuous downward pressure to the top of the beam sample 6, so that the beam sample 6 is in a dynamic stress state in the salt spray corrosion test, and the stress condition of the beam in actual use is truly simulated, so that the test environment is highly close to the actual working condition, thereby ensuring that the corrosion test results can accurately reflect the performance of the beam in the actual scene, and solves the problem that the corrosion test of the static placement of the beam sample cannot reflect the influence of dynamic stress on the corrosion cracks inside the beam, especially whether stress corrosion cracking can be triggered in the salt spray environment.

[0041] As another embodiment of the present invention, the dynamic test frame 5 also includes an adjusting bracket 52, and the adjusting bracket 52 includes a bottom plate 5201 arranged at the bottom of the inner cavity of the test box 2, and the top of the bottom plate 5201 is connected to four sliding bars 5202, two fixed frames 5203 and multiple fixed seats 5204; the four sliding bars 5202 are arranged in four corners, and the static test frame 4 is movably arranged on the top of the sliding bars 5202, and the two fixed frames 5203 are arranged in a symmetrical structure. A worm 5205 is rotatably connected between every two fixed seats 5204, and there are two worm gears 5205, and the two worm gears 5205 are arranged in a symmetrical structure.

[0042] Furthermore, the dynamic test frame 5 also includes a double-groove synchronous wheel 505 rotatably arranged on the outer wall of the test box 2. The double-groove synchronous wheel 505 is a synchronous wheel with two annular tooth grooves. The double-groove synchronous wheel 505 is coaxially connected to a handwheel 506. The double-groove synchronous wheel 505 is respectively connected to a first synchronous wheel 508 and a second synchronous wheel 509 through two synchronous belts 507. The first synchronous wheel 508 is coaxially connected to the worm 5205, and the second synchronous wheel 509 is coaxially connected to another worm 5205. The fixed frame A screw rod 5206 is rotatably arranged on 5203, and a worm wheel 5207 is connected to the lower end of the screw rod 5206. The worm wheel 5207 is meshed with the worm 5205. A plurality of bottom columns 5208 are connected to the top of the fixed frame 5203, and a sliding column 5209 is connected to the top of the bottom column 5208. A limit block 5210 is connected to the top of the sliding column 5209. A movable push block 5211 is slidably sleeved on the sliding column 5209. The screw rod 5206 passes through the top of the movable push block 5211 and cooperates with the inner cavity thread of the movable push block 5211.

[0043] In the present invention, when the dynamic salt spray test is performed, the operator drives the double-groove synchronous wheel 505 to rotate by turning the hand wheel 506, and then drives the first synchronous wheel 508 and the second synchronous wheel 509 to rotate. The rotation of the first synchronous wheel 508 and the second synchronous wheel 509 will drive the two worms 5205 to rotate synchronously. The two worms 5205 are arranged in a symmetrical structure, and each worm 5205 is meshed with the corresponding worm wheel 5207. When the worm 5205 rotates, it drives the worm wheel 5207 meshed with it to rotate. The worm wheel 5207 and the lead screw 5207 are connected. 206, so the rotation of the worm gear 5207 will cause the screw rod 5206 to rotate, the screw rod 5206 passes through the top of the movable push block 5211, and cooperates with the inner cavity thread of the movable push block 5211. At the same time, the movable push block 5211 is slidably sleeved on the sliding column 5209. When the screw rod 5206 rotates, due to the thread cooperation between the screw rod 5206 and the movable push block 5211 and the sliding restriction of the movable push block 5211 on the sliding column 5209, the movable push block 5211 will make linear motion along the sliding column 5209, that is, move upward or downward.

[0044] In an embodiment of the present invention, a movable pressure frame 510 movably mounted on four sliding bars 5202 is integrally formed on the top of the upper pressure block 501, and a movable pendant frame 511 movably mounted on four sliding bars 5202 is integrally formed on the bottom of the lower pendant block 502. A plurality of counterweight grooves are provided on the top of the movable pressure frame 510, and a plurality of fixed columns 512 are arranged in the counterweight grooves. A plurality of counterweight plates 513 are movably inserted on the fixed columns 512. The test personnel can change the pressure applied to the beam sample 6 by increasing or decreasing the number of counterweight plates 513 according to the test requirements. A counterweight groove with the same structure as that of the top of the movable pressure frame 510 is provided on the top of the movable pendant frame 511; a plurality of movable channels 514 are provided on the movable pressure frame 510 from top to bottom, a screw rod 5206 is arranged in the movable channel 514, and the screw rod 5206 is clearance-matched with the inner wall of the movable channel 514, and a movable push block 5211 is arranged below the movable channel 514.

[0045] The present invention adjusts the movable push block 5211 to make an upward or downward linear movement along the slide column 5209 by rotating the hand wheel 506. When the movable push block 5211 moves upward, the movable push block 5211 pushes the movable pressing frame 510 to rise, thereby driving the movable pendant frame 511 to rise, so that the movable pendant frame 511 leaves the top of the bottom plate 5201 to form a suspended state. Figure 6At this time, the movable pendant frame 511 is subjected to its own gravity, which generates a downward pulling force on the movable rod 504, causing the rhombus movable frame 51 to have a longitudinal stretching deformation tendency, thereby prompting the two symmetrically arranged supporting blocks 503 to form a mutual extrusion tendency, forming an extrusion force on both ends of the beam sample 6, simulating the extrusion force that the beam may withstand during actual use; when the movable push block 5211 moves downward, the movable pressure frame 510 gradually descends until the movable push block 5211 moves downward to form a separation state with the bottom of the movable pressure frame 510, referring to Figure 5 At this time, the movable pendant frame 511 is located on the top of the bottom plate 5201, and the movable pressure frame 510 is affected by its own gravity, which produces downward pressure on the movable rod 504, causing the diamond-shaped movable frame 51 to have a deformation tendency of lateral expansion, thereby prompting the two symmetrically arranged supporting blocks 503 to form a tendency to move away from each other, forming a tensile force on both ends of the beam sample 6, simulating the tensile force that the beam may withstand during actual use; by intermittently adjusting the extrusion force and tensile force on both ends of the beam sample 6, the dynamic force that the beam is subjected to in actual use can be simulated, and combined with the salt spray corrosion test, the performance of the beam under such enhanced test conditions is reflected.

[0046] In an embodiment of the present invention, the bump pressure assembly 53 includes two connecting frames 5301 detachably connected to the bottom of the upper pressure block 501, and a sliding channel 5302 is opened on the side wall of the connecting frame 5301. A pressure cylinder 5303 is arranged between the two connecting frames 5301. A slider 5304 is connected to the side wall of the pressure cylinder 5303. The slider 5304 is movably arranged in the sliding channel 5302. The pressure cylinder 5303 is movably coordinated with the sliding channel 5302 through the slider 5304. The pressure cylinder 5303 is used to press down on the top of the beam sample 6. The pressure cylinder 5303 is movably coordinated with the sliding channel 5302 of the connecting frame 5301 through the slider 5304, and relies on its own gravity to press down on the top of the beam sample 6, and applies continuous downward pressure on the top of the beam sample 6 to simulate the downward pressure that the beam sample 6 is actually subjected to.

[0047] As another embodiment of the present invention, a motor 5305 is arranged in the inner cavity of the pressing cylinder 5303, and the output end of the motor 5305 is connected to the first bevel gear 5306, and the output ends of the first bevel gear 5306 are respectively meshed with the second bevel gear 5307 and the third bevel gear; the second bevel gear 5307 is coaxially connected to the first rotating plate 5308, and the third bevel gear is coaxially connected to the second rotating plate 5309, and the first rotating plate 5308 and the second rotating plate 5309 are symmetrically arranged on the outer side of the pressing cylinder 5303; the side wall of the first rotating plate 5308 is provided with a wheel chamber 5310, and the first rotating plate 5310 is provided with a wheel chamber 5311. The other side wall of 308 is provided with an arc groove 5311, in which a driving column 5312 is movably arranged, and a wheel plate 5313 is rotatably connected to the outer wall of the driving column 5312, and the bottom of the wheel plate 5313 protrudes from the bottom of the first rotating plate 5308, and the wheel plate 5313 is arranged in the wheel chamber 5310; the second rotating plate 5309 is provided with the same structural components as those on the first rotating plate 5308; the first bevel gear 5306 is driven to rotate by the motor 5305, and the first bevel gear 5306 drives the second bevel gear 5307 and the third bevel gear to rotate synchronously in the opposite direction, thereby driving The first rotating plate 5308 and the second rotating plate 5309 are driven to rotate synchronously in opposite directions. When the first rotating plate 5308 rotates, the wheel plate 5313 in the wheel chamber 5310 will follow the rotation of the first rotating plate 5308 to make a circular motion. When the wheel plate 5313 moves to the top of the beam sample 6, the wheel plate 5313 will squeeze the top of the beam sample 6, prompting the pressing cylinder 5303 to move upward along the sliding channel 5302. When the wheel plate 5313 leaves the top of the beam sample 6, the pressing cylinder 5303 loses the reaction force generated by the squeezing and will fall again on the top of the beam sample 6. This cycle continues, so that the pressing cylinder 5303 is 303 continuously moves up and down on the top of the beam sample 6, causing repeated bumps and impacts on the top of the beam sample 6, simulating the impact of bumps on the beam during the driving of a car. The second rotating plate 5309 has the same effect as the first rotating plate 5308, and the rotation directions of the first rotating plate 5308 and the second rotating plate 5309 are opposite, so that the two wheel plates 5313 squeeze the top of the beam sample 6 respectively, causing the pressing cylinder 5303 to bump. It is through the mutual squeezing that the up and down bumping movement state of the pressing cylinder 5303 can be relatively stable, reducing the deviation.

[0048] The present invention designs a bump pressure component 53, uses a motor 5305 to drive the bevel gear to drive the rotating plate to rotate, so that the wheel plate 5313 squeezes the top of the beam sample 6, causing the pressure cylinder 5303 to continuously move up and down, and produces repeated bump impacts on the beam sample, which highly simulates the impact of the road bumps on the sunroof beam during the driving process of the car, so that the test results can better reflect the performance of the beam in actual use, expose potential quality problems, such as the initiation of corrosion cracks, and can not only reflect the corrosion resistance of the beam, but also can simultaneously test the reliability of its structure under the dual effects of external force impact and salt spray corrosion. This bump will produce additional pressure and vibration stress on the sunroof beam, forming a synergistic effect with salt spray corrosion. This can not only accelerate the destruction of the protective layer on the surface of the beam, making the salt spray easier to contact the metal matrix to accelerate corrosion, but also simulate the structural fatigue phenomenon that may occur in long-term use to a certain extent, which is helpful to discover potential quality problems in a relatively short time, such as crack initiation, material deformation, etc., and improve the effectiveness and reliability of the test.

[0049] As another embodiment of the present invention, a concave frame 5314 is integrally formed on the side wall of the pressing cylinder 5303, and the first rotating plate 5308 is rotatably arranged inside the concave frame 5314; a fixed cylinder 5315 is connected to the inner wall of the concave frame 5314, and the inner cavity of the fixed cylinder 5315 is in clearance with the rotating shaft of the first rotating plate 5308; two fixed ring plates 5316 are connected to the circumferential outer wall of the fixed cylinder 5315, and a rotating plate 5317 is rotatably arranged on the circumferential outer wall of the fixed cylinder 5315, and the rotating plate 5317 is arranged between the two fixed ring plates 5316; a push-pull plate 5317 is integrally formed on the circumferential outer wall of the rotating plate 5317 318, a movable groove 5319 is provided on the side wall of the push-pull plate 5318, one end of the driving column 5312 is movably arranged in the movable groove 5319, a plurality of inclined plates 5320 are connected to the circumferential outer wall of the rotating plate 5317, a sleeve 5321 is arranged between every two inclined plates 5320, a roller 5322 is rotatably arranged on the circumferential inner wall of the sleeve 5321, the side wall of the sleeve 5321 is connected to the side wall of the inclined plate 5320 through a plurality of springs 5323, a plurality of arc-shaped protrusions 5324 are connected to the circumferential outer wall of the fixed ring plate 5316, and the roller 5322 is arranged between every two arc-shaped protrusions 5324. The forward or reverse rotation of the motor 5305 can drive the first rotating plate 5308 to rotate forward or reverse. When the first rotating plate 5308 rotates forward, the wheel plate 5313 will follow the forward rotation of the first rotating plate 5308 to make a forward circular motion. The driving column 5312 of the wheel plate 5313 pushes the push-pull plate 5318 and the rotating plate 5317 to rotate around the fixed cylinder 5315 in the movable groove 5319. During the rotation of the rotating plate 5317, the roller column 5322 between the inclined plate 5320 on the outer wall rolls on the circumferential outer wall of the fixed ring plate 5316. Since the sleeve 5321 is connected to the inclined plate 5320 by the spring 5323, the roller column 5322 is pressed against the outer wall of the fixed ring plate 5316 by the spring tension, and the arc-shaped protrusion 5324 on the outer wall of the fixed ring plate 5316 increases The rolling resistance of the roller 5322 is increased, so that the force of the driving column 5312 pushing the rotating plate 5317 to rotate increases, and the reaction force of this force causes the driving column 5312 to slide toward one end in the arc groove 5311, driving the wheel plate 5313 to move in the wheel chamber 5310, thereby shortening the length of the wheel plate 5313 protruding from the bottom of the first rotating plate 5308; when the first rotating plate 5308 rotates in the opposite direction, the wheel plate 5313 makes a reverse circular motion, and the driving column 5312 pushes the rotating plate 5317 to rotate in the opposite direction. Similarly, due to the action of the roller 5322 and the arc-shaped protrusion 5324, the driving column 5312 slides toward the other end in the arc groove 5311, driving the wheel plate 5313 to move in the opposite direction in the wheel chamber 5310, thereby lengthening the length of the wheel plate 5313 protruding from the bottom of the first rotating plate 5308. The change in the protruding length of the wheel plate 5313 directly affects the amplitude of the upward and downward movement of the pressing cylinder 5303 on the top of the beam sample 6, thereby achieving the purpose of adjusting the bumpy impact strength of the pressing cylinder 5303 on the beam sample 6 by the forward and reverse rotation of the motor 5305.

[0050] Embodiment 2 This embodiment provides a method for using a corrosion resistance test device for a skylight crossbeam, comprising the following steps: S1, static corrosion test of skylight beam, placing beam sample 6 on top of static test frame 4, ensuring that beam sample 6 is placed stably, conducting static salt spray corrosion test, starting salt spray generating device of salt spray test machine 1, filling test box 2 with salt spray of a certain concentration, and settling salt spray on the surface of beam sample 6, and starting static corrosion resistance test; S2, dynamic corrosion test of skylight beams; S2.1, preparation stage, insert the beam sample 6 into the jack of the beam sample 6 through the plug post 5031 on the top of the support block 503, fix it on the rhombus movable frame 51 of the dynamic test frame 5, two support blocks 503 firmly fix the two ends of the beam sample 6, start the salt spray generating device of the salt spray test machine 1, fill the test box 2 with a certain concentration of salt spray, and the salt spray settles on the surface of the beam sample 6, and start the corrosion resistance test; S2.2. Dynamic force adjustment in corrosion resistance test. The operator adjusts the movable push block 5211 to move upward or downward by turning the hand wheel 506 on the outer wall of the test box 2. When the movable push block 5211 moves upward, it pushes the movable pressure frame 510 to rise, driving the movable pendant frame 511 to rise and leave the top of the bottom plate 5201. The gravity of the movable pendant frame 511 generates a downward pulling force on the movable rod 504, and the diamond-shaped movable frame 51 is stretched and deformed longitudinally, and the supporting block 503 applies a squeezing force to both ends of the beam sample 6; when the movable push block 5211 moves downward, the movable pressure frame 510 descends until the movable push block 5211 is separated from the bottom of the movable pressure frame 510, and the movable pendant frame 511 falls on the top of the bottom plate 5201. The gravity of the movable pressure frame 510 causes the diamond-shaped movable frame 51 to expand and deform laterally, and the supporting block 503 applies a tensile force to both ends of the beam sample 6; by intermittently adjusting the hand wheel 506, the dynamic tensile force and extrusion force on the beam in actual use are simulated; S2.3. Start the bump pressure component and connect the power supply of the motor 5305 in the bump pressure component 53. The motor 5305 starts and drives the first bevel gear 5306 to rotate. The first bevel gear 5306 drives the second bevel gear 5307 and the third bevel gear to rotate synchronously in the opposite direction, thereby driving the first rotating plate 5308 and the second rotating plate 5309 to rotate synchronously in the opposite direction. When the first rotating plate 5308 and the second rotating plate 5309 rotate, the wheel plate 5313 in the wheel chamber 5310 follows and makes a circular motion. When the wheel plate 5313 moves to the top of the beam sample 6, it squeezes the top of the beam sample 6, causing the pressing cylinder 5303 to move upward along the sliding channel 5302; when the wheel plate 5313 leaves the top of the beam sample 6, the pressing cylinder 5303 loses the reaction force of the squeezing force and falls back to the top of the beam sample 6, and this cycle repeats, causing repeated bumping impacts on the top of the beam sample 6, simulating the bumps during the driving of the car; according to the test requirements, the length of the wheel plate 5313 protruding from the bottom of the first rotating plate 5308 can be adjusted by controlling the forward and reverse rotation of the motor 5305. When the motor 5305 rotates forward, the protruding length of the wheel plate 5313 is shortened, and the bump amplitude of the pressing cylinder 5303 is reduced; when the motor 5305 rotates reversely, the protruding length of the wheel plate 5313 becomes longer, and the bump amplitude of the pressing cylinder 5303 increases, thereby adjusting the intensity of the bumping impact on the beam sample 6; S3. End of test processing: After the test, turn off the power of the salt spray tester 1 and the bump pressure assembly 53, carefully take out the beam sample 6, observe the corrosion condition on the surface of the beam sample 6, such as whether there is rust, corrosion pits, deformation, cracking, etc., record and analyze the test results, evaluate whether the corrosion resistance, structural strength and stability of the skylight beam meet the actual use requirements, clean and maintain the test equipment, and restore the test frame assembly and other components to their original state for the next test.

[0051] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A corrosion resistance test equipment for skylight beams, characterized in that: The salt spray test machine (1) comprises a test box (2), wherein a plurality of test frame assemblies (3) are arranged in the inner cavity of the test box (2), and the test frame assemblies (3) comprise a static test frame (4) and a dynamic test frame (5); The dynamic test frame (5) comprises a rhombus-shaped movable frame (51), the rhombus-shaped movable frame (51) is a frame body with a rhombus structure, the rhombus-shaped movable frame (51) comprises an upper pressing block (501), a falling block (502), two symmetrically arranged supporting blocks (503) and four movable rods (504), the upper pressing block (501) and the supporting block (503) are movably connected via the movable rod (504), and the falling block (502) and the supporting block (503) are movably connected via another movable rod (504); A plurality of plug posts (5031) are arranged on the top of the support block (503), and the plug posts (5031) are used to be inserted into the plug holes of the beam sample (6) to fix the beam sample (6), and the two support blocks (503) are used to fix the two ends of the beam sample (6); The diamond-shaped movable frame (51) can apply a tensile force or a compressive force to both ends of the beam sample (6), so that during the salt spray corrosion test of the beam sample (6) in the test box (2), the beam sample (6) can withstand the effects of different forces and coordinate the test with the salt spray; A bump pressure component (53) is arranged at the bottom of the upper pressing block (501), and the bump pressure component (53) can apply continuous downward pressure to the top of the beam sample (6), and can perform a bump impact on the top of the beam sample (6), simulating the impact force generated by the bumps during the driving of the car on the beam sample (6).

2. The corrosion resistance test equipment for skylight beams according to claim 1, characterized in that: The dynamic test frame (5) further comprises an adjustment bracket (52), wherein the adjustment bracket (52) comprises a bottom plate (5201) arranged at the bottom of the inner cavity of the test box (2), and the top of the bottom plate (5201) is connected to four sliding rods (5202), two fixing brackets (5203) and a plurality of fixing seats (5204); The four sliding bars (5202) are arranged at four corners, the static test frame (4) is movably arranged on the top of the sliding bars (5202), and the top of the static test frame (4) is used to place the beam sample (6); The two fixing frames (5203) are arranged in a symmetrical structure, and a worm (5205) is rotatably connected between each two fixing seats (5204). There are two worms (5205), and the two worms (5205) are arranged in a symmetrical structure.

3. The corrosion resistance test equipment for skylight beams according to claim 2, characterized in that: The dynamic test frame (5) further comprises a double-grooved synchronous wheel (505) rotatably arranged on the outer side wall of the test box (2), the double-grooved synchronous wheel (505) being coaxially connected to a hand wheel (506), and the double-grooved synchronous wheel (505) being respectively connected to a first synchronous wheel (508) and a second synchronous wheel (509) via a plurality of synchronous belts (507); The first synchronous wheel (508) is coaxially connected to the worm (5205), and the second synchronous wheel (509) is coaxially connected to another worm (5205).

4. The corrosion resistance test equipment for skylight beams according to claim 3, characterized in that: A lead screw (5206) is rotatably arranged on the fixed frame (5203), a worm wheel (5207) is connected to the lower end of the lead screw (5206), and the worm wheel (5207) is meshingly connected with the worm (5205); The top of the fixed frame (5203) is connected to a plurality of bottom columns (5208), the top of the bottom column (5208) is connected to a sliding column (5209), the top of the sliding column (5209) is connected to a limit block (5210), a movable push block (5211) is provided on a sliding sleeve of the sliding column (5209), and the screw rod (5206) passes through the top of the movable push block (5211) and cooperates with the inner cavity thread of the movable push block (5211).

5. The corrosion resistance testing equipment for skylight beams according to claim 4, characterized in that: The top of the upper pressing block (501) is integrally formed with a movable pressing frame (510) movably mounted on the four sliding rods (5202); the bottom of the lower sinking block (502) is integrally formed with a movable pendant frame (511) movably mounted on the four sliding rods (5202); a plurality of counterweight grooves are provided on the top of the movable pressing frame (510); a plurality of fixed columns (512) are arranged in the counterweight grooves; a plurality of counterweight plates (513) are movably inserted on the fixed columns (512); a counterweight groove having the same structure as that of the top of the movable pressing frame (510) is provided on the top of the movable pendant frame (511); The movable pressure frame (510) is provided with a plurality of movable channels (514) from top to bottom, the screw rod (5206) is arranged in the movable channel (514), and the screw rod (5206) is clearance-matched with the inner wall of the movable channel (514), and the movable push block (5211) is arranged below the movable channel (514).

6. The corrosion resistance test equipment for skylight beams according to claim 5, characterized in that: The bump pressure assembly (53) includes two connecting frames (5301) detachably connected to the bottom of the upper pressure block (501), the side walls of the connecting frames (5301) are provided with sliding channels (5302), a pressure cylinder (5303) is arranged between the two connecting frames (5301), the side walls of the pressure cylinder (5303) are connected with sliders (5304), the sliders (5304) are movably arranged in the sliding channels (5302), the pressure cylinder (5303) is movably coordinated with the sliding channels (5302) through the sliders (5304), and the pressure cylinder (5303) is used to press down on the top of the beam sample (6), apply continuous downward pressure to the top of the beam sample (6), and simulate the downward pressure that the beam sample (6) is actually subjected to.

7. The corrosion resistance test equipment for skylight beams according to claim 6, characterized in that: The inner cavity of the pressing cylinder (5303) is provided with a motor (5305), the output end of the motor (5305) is connected to a first bevel gear (5306), and the output ends of the first bevel gear (5306) are respectively meshed with a second bevel gear (5307) and a third bevel gear; The second bevel gear (5307) is coaxially connected to the first rotating plate (5308), and the third bevel gear is coaxially connected to the second rotating plate (5309). The first rotating plate (5308) and the second rotating plate (5309) are symmetrically arranged on the outer sides of the pressing cylinder (5303).

8. The corrosion resistance testing equipment for skylight beams according to claim 7, characterized in that: A wheel chamber (5310) is formed on a side wall of the first rotating plate (5308); an arc-shaped groove (5311) is formed on the other side wall of the first rotating plate (5308); a driving column (5312) is movably arranged in the arc-shaped groove (5311); a wheel plate (5313) is rotatably connected to the circumferential outer wall of the driving column (5312); and the wheel plate (5313) is arranged in the wheel chamber (5310); The second rotating plate (5309) is provided with the same structural components as those on the first rotating plate (5308).

9. The corrosion resistance testing equipment for skylight beams according to claim 8, characterized in that: The side wall of the pressing cylinder (5303) is integrally formed with a recessed frame (5314), and the first rotating plate (5308) is rotatably arranged inside the recessed frame (5314); The inner side wall of the recessed frame (5314) is connected to a fixed cylinder (5315), and the inner cavity of the fixed cylinder (5315) is in clearance with the rotating shaft of the first rotating plate (5308); The fixed cylinder (5315) is connected to two fixed ring plates (5316) on its circumferential outer wall, and a rotating plate (5317) is rotatably arranged on the fixed cylinder (5315) on its circumferential outer wall, and the rotating plate (5317) is arranged between the two fixed ring plates (5316); A push-pull plate (5318) is integrally formed on the circumferential outer wall of the rotating plate (5317), a movable groove (5319) is provided on the side wall of the push-pull plate (5318), and one end of the driving column (5312) is movably arranged in the movable groove (5319).

10. The corrosion resistance testing equipment for skylight beams according to claim 9, characterized in that: The outer circumferential wall of the rotating plate (5317) is connected to a plurality of inclined plates (5320), a sleeve (5321) is arranged between every two inclined plates (5320), a roller (5322) is rotatably arranged on the inner circumferential wall of the sleeve (5321), and the side wall of the sleeve (5321) is connected to the side wall of the inclined plate (5320) via a plurality of springs (5323); The circumferential outer wall of the fixed ring plate (5316) is connected to a plurality of arc-shaped protrusions (5324), and the roller (5322) is arranged between every two of the arc-shaped protrusions (5324).

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