Graphite paper surface flatness detection device

Abstract

The invention belongs to the technical field of optical detection, and particularly relates to a graphite paper surface flatness detection device which comprises a fixed base, a detection platform is connected to the fixed base, a graphite paper tube is installed on the detection platform, and to-be-detected graphite paper is wound on the outer wall of the graphite paper tube. The outer wall of the detection platform is fixedly connected with a rotating motor, the driving end of the rotating motor is fixedly connected with a rotating plate located on the outer side of the to-be-detected graphite paper, and laser displacement sensors are evenly distributed on the side, close to the to-be-detected graphite paper, of the rotating plate. The longitudinal leveling mechanism and the transverse leveling mechanism are arranged to eliminate transverse folding and longitudinal folding parts on the surface of the to-be-detected graphite paper, then the laser displacement sensor is used for calculating the distance between the to-be-detected graphite paper, and the graphite paper pressure sensor is used for measuring the pressure at the contact position with the to-be-detected graphite paper; and the flatness condition of the surface of the graphite paper to be detected is determined according to different position distances and different pressures.

Description

Technical Field

[0001] This invention relates to the field of optical inspection technology, and in particular to a device for detecting the surface flatness of graphite paper. Background Technology

[0002] Graphite paper is a new type of sealing base material with high temperature resistance, corrosion resistance, radiation resistance, excellent electrical and thermal conductivity, good compressibility, resilience and low stress relaxation rate.

[0003] The flatness of graphite paper is a key aspect of its quality. Flat graphite paper is fundamental for effective sealing. If the graphite paper surface has wrinkles or unevenness, bubbles or cracks are likely to occur during sealing. On high-speed automated production lines, graphite paper with poor flatness can easily lead to uneven winding or slitting deviations, increasing equipment downtime and material waste. Traditionally, the flatness of graphite paper is widely tested using optical or contact methods. For example, Chinese patent CN109373964B discloses an intelligent flatness detection device, including a reference plate, a base, a plate to be tested, and a power supply. The plate to be tested is movably placed on the upper surface of the base. The plate, the base is fixedly connected to the reference plate directly above the plate to be tested via an adjustable length plate. The base, the plate to be tested, and the reference plate are all rectangular structures. A through hole is provided on one side of the reference plate, and a first bearing rod is movably installed in the through hole. The first bearing rod is fixedly connected to a second nano-flexible graphite paper pressure sensor via a second pressure-resistant film. A first nano-flexible graphite paper pressure sensor is movably installed on the upper surface of the other side of the reference plate. However, during the testing process, the graphite paper may fold when unfolded, causing thickening and protrusion in some areas. Direct testing will cause deviation in the test results.

[0004] To address the aforementioned issues, we propose a graphite paper surface flatness detection device. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the background art by providing a graphite paper surface flatness detection device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a graphite paper surface flatness detection device, comprising a fixed base, a detection platform connected to the fixed base, a graphite paper tube installed on the detection platform, graphite paper to be inspected wound around the outer wall of the graphite paper tube, a rotating motor fixedly connected to the outer wall of the detection platform, a cylinder fixedly connected to the drive end of the rotating motor, a rotating plate located outside the graphite paper to be inspected fixedly connected to the drive end of the cylinder, laser displacement sensors evenly distributed on the side of the rotating plate near the graphite paper to be inspected, a longitudinal flattening mechanism provided on the detection platform, a transverse flattening mechanism installed on the longitudinal flattening mechanism, the longitudinal flattening mechanism including a flattening rod that moves longitudinally close to the graphite paper to be inspected, and the transverse flattening mechanism including a flattening plate installed on the flattening rod that moves laterally; The longitudinal and transverse flattening mechanisms eliminate folds in the graphite paper to be inspected, and the laser displacement sensor detects the flatness of the graphite paper to be inspected.

[0007] In the above-mentioned graphite paper surface flatness detection device, a rotating roller is installed on the detection platform, the graphite paper tube is fixedly sleeved on the outer wall of the rotating roller, a notch is opened at the end of the rotating roller, a cylinder is installed on the detection platform, and a clamping plate matching the notch is fixedly connected to the driving end of the cylinder, and the rotating roller is prevented from rotating by inserting the clamping plate into the notch.

[0008] In the graphite paper surface flatness detection device described above, an adjustment motor is fixedly connected to the upper side wall of the fixed base, and the lower end of the detection platform is fixed to the outer wall of the adjustment motor drive end.

[0009] In the above-mentioned graphite paper surface flatness detection device, the detection platform has multiple detection ports arranged in a horizontal row, and a graphite paper pressure sensor is installed in each detection port.

[0010] In the above-mentioned graphite paper surface flatness detection device, the longitudinal flattening mechanism further includes a through groove opened on the detection platform. A telescopic cylinder is fixedly connected to the top wall of the through groove. A longitudinal moving plate is fixedly connected to the driving end of the telescopic cylinder. A guide tube is fixedly connected to the end of the longitudinal moving plate through a connecting plate. A sliding plate is slidably inserted into the end of the guide tube. A telescopic spring is fixedly connected between the sliding plate and the inner wall of the guide tube. The flattening rod is fixed between the two sliding plates. A guide mechanism for pushing the sliding plate to move is provided between the sliding plate and the detection platform. The guide mechanism includes an electric telescopic rod fixed to the rear side wall of the detection platform. A right-angled trapezoidal plate is fixedly connected to the driving end of the electric telescopic rod. A placement opening corresponding to the position of the electric telescopic rod is opened on the outer wall of the right-angled trapezoidal plate. A sliding column is fixedly connected to the outer wall of the sliding plate. The sliding column contacts the inclined surface of the right-angled trapezoidal plate.

[0011] In the above-mentioned graphite paper surface flatness detection device, the transverse flattening mechanism further includes symmetrically opened grooves on the flattening rod. A movable plate is slidably arranged in the groove. A return spring is fixedly connected between the movable plate and the inner wall of the groove. A pressing push plate is fixedly connected to the end of each of the two movable plates that are close to each other. A drive motor is fixedly connected to the middle of the flattening rod. A lever plate that contacts the outer wall of the pressing push plate is fixedly connected to the drive end of the drive motor. A groove is opened on the side of the flattening rod near the graphite paper to be inspected. The flattening plate is slidably arranged in the groove.

[0012] In the graphite paper surface flatness detection device described above, the thickness of the groove is the same as the thickness of the flat plate.

[0013] In the above-mentioned graphite paper surface flatness detection device, the surface of the detection platform is provided with two pneumatic suction cups.

[0014] Compared with existing technologies, the advantages of this graphite paper surface flatness detection device are: A longitudinal flattening mechanism is set up. The telescopic cylinder is activated, which drives the longitudinal plate, connecting plate, guide tube, sliding plate, and flattening rod to move downward. The sliding column moves downward along the inclined surface of the right-angled trapezoidal plate, gradually pushing the sliding column, sliding plate, and flattening rod to the rear. As the flattening rod moves downward, it moves backward synchronously and slowly approaches the graphite paper to be inspected and comes into contact with it. When the sliding column transitions from the inclined surface to the straight surface of the right-angled trapezoidal plate, the flattening rod and the inspection platform press against the graphite paper to be inspected. The flattening rod stops moving backward but can continue to move downward, thereby pulling the lower end of the graphite paper to be inspected downward and flattening it, removing the folds on the graphite paper, so that the inspection work can be carried out stably. A horizontal flattening mechanism is set up. The drive motor is started to drive the dial plate to rotate. The dial plate contacts the outer wall of the extrusion push plate, pushing the extrusion push plate, the moving plate and the flat plate to move outward, so that the horizontally folded part of the graphite paper to be inspected unfolds. A laser position sensor and a graphite paper pressure sensor are set up. The laser position sensor calculates the distance between the graphite paper to be tested and the laser position sensor. If the distance is different, it indicates that the surface of the graphite paper to be tested is not flat. The graphite paper to be tested makes contact with the graphite paper pressure sensor. The graphite paper pressure sensor detects the pressure at the contact point with the graphite paper to be tested. If there is unevenness at the contact point, the pressure detected by the graphite paper pressure sensor will be different. In summary, this invention eliminates the transverse and longitudinal folds on the surface of the graphite paper to be inspected by setting up a longitudinal flattening mechanism and a transverse flattening mechanism. Then, it calculates the distance between the laser displacement sensor and the graphite paper to be inspected and measures the pressure at the contact point with the graphite paper to be inspected by a graphite paper pressure sensor. The flatness of the surface of the graphite paper to be inspected is determined by the different distances and pressures at different positions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front structure of a graphite paper surface flatness detection device proposed in this invention. Figure 2 This is a schematic diagram of the rear structure of a graphite paper surface flatness detection device proposed in this invention. Figure 3 This is a schematic diagram of the longitudinal flattening mechanism in a graphite paper surface flatness detection device proposed in this invention; Figure 4 This is a schematic diagram of the longitudinal flattening structure in a graphite paper surface flatness detection device proposed in this invention from another perspective. Figure 5 This is a schematic diagram of the transverse flattening mechanism in a graphite paper surface flatness detection device proposed in this invention; Figure 6 This is a schematic diagram of the transverse flattening mechanism in a graphite paper surface flatness detection device proposed in this invention from another perspective. Figure 7 This is a schematic diagram of the rotating plate in a graphite paper surface flatness detection device proposed in this invention. Figure 8 This is a schematic diagram of the surface structure of the detection platform in the graphite paper surface flatness detection device proposed in this invention; Figure 9 This is a schematic diagram showing the state of the detection platform when it is rotated to a horizontal position in the graphite paper surface flatness detection device proposed in this invention.

[0016] In the diagram: 1. Fixed base, 2. Adjusting motor, 3. Detection platform, 4. Rotating roller, 5. Graphite paper tube, 6. Cylinder, 7. Clamping plate, 8. Graphite paper to be inspected, 9. Rotating motor, 10. Rotating plate, 11. Laser displacement sensor, 12. Through slot, 13. Telescopic cylinder, 14. Longitudinal moving plate, 15. Connecting plate, 16. Guide tube, 17. Sliding plate, 18. Pulling rod, 19. Right-angle trapezoidal plate, 20. Electric telescopic rod, 21. Placement port, 22. Sliding column, 23. Slide groove, 24. Moving plate, 25. Return spring, 26. Pulling plate, 27. Extrusion pushing plate, 28. Drive motor, 29. Paddle plate, 30. Groove, 31. Detection port, 32. Graphite paper pressure sensor, 33. Pneumatic suction cup. Detailed Implementation

[0017] The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] Reference Figures 1-9 A graphite paper surface flatness testing device includes a fixed base 1, a testing platform 3 connected to the fixed base 1, a graphite paper tube 5 mounted on the testing platform 3, graphite paper 8 to be tested wound around the outer wall of the graphite paper tube 5, a rotating roller 4 mounted on the testing platform 3, the rotating roller 4 being driven to rotate by an external motor, the graphite paper tube 5 being fixedly sleeved on the outer wall of the rotating roller 4, and a notch being opened at the end of the rotating roller 4, a cylinder 6 mounted on the testing platform 3, and a clamping plate 7 matching the notch being fixedly connected to the driving end of the cylinder 6, the clamping plate 7 being inserted into the notch to prevent the rotating roller 4 from rotating, the graphite paper tube 5 being mounted on the rotating roller 4, the rotating roller 4 rotating by rotating a fixed angle each time, causing the graphite paper 8 to be tested to turn open, the rotating roller 4 stopping rotating, the graphite paper 8 to be tested unfolding for flattening and testing, the driving end of the cylinder 6 extending, the clamping plate 7 engaging in the notch to limit the rotating roller 4, preventing the rotating roller 4 from rotating, and ensuring the stability of the graphite paper 8 to be tested during the testing process.

[0019] A rotary motor 9 is fixedly connected to the outer wall of the testing platform 3. A cylinder is fixedly connected to the drive end of the rotary motor 9. A rotating plate 10 located on the outside of the graphite paper 8 to be inspected is fixedly connected to the drive end of the cylinder. Laser displacement sensors 11 are evenly distributed on the side of the rotating plate 10 near the graphite paper 8 to be inspected. A longitudinal flattening mechanism is provided on the testing platform 3. A transverse flattening mechanism is installed on the longitudinal flattening mechanism. The longitudinal flattening mechanism includes a flattening rod 18 that moves longitudinally near the graphite paper 8 to be inspected. The transverse flattening mechanism includes a flattening plate 26 that moves laterally on the flattening rod 18. To prevent the rotating plate 10 from affecting the graphite paper 8 when it is unfolded, the rotating plate 10 is set to rotate. When the graphite paper 8 to be inspected is unfolded, the rotary motor 9 first drives the rotating plate 10 to rotate away from the testing platform 3, so that the graphite paper 8 to be inspected can unfold smoothly downwards. After the graphite paper 8 to be inspected is unfolded and flattened, the rotary motor 9 drives the rotating plate 10 to rotate to the side away from the testing platform 3. The detection platform 3 is parallel to the laser displacement sensor 11, which consists of a laser, a laser detector, and a measurement circuit. The laser emits a laser beam that comes into contact with the graphite paper 8 to be inspected. The laser beam that comes into contact with the graphite paper 8 is scattered and then received by the laser detector. The measurement circuit calculates the time it takes for the laser to return and then calculates the distance between the graphite paper 8 to be inspected and the laser displacement sensor 11. If the distance is different, it indicates that the surface of the graphite paper 8 to be inspected is not flat and there are protrusions or depressions. This allows for the rapid detection of the condition of the graphite paper 8 to be inspected. The cylinder drives the rotating plate 10 to reciprocate, enabling the detection of a section of the graphite paper 8 from all directions. Similarly, the pressure sensor 32 can also be modularized. For example, the pressure sensor 32 can be set on a whole plate, and a cylinder that drives the plate to move left and right is set in the detection port 31 to realize the pressure detection at different positions of a section of the graphite paper 8 to be inspected. The folds of the graphite paper 8 to be inspected are eliminated by the longitudinal flattening mechanism and the transverse flattening mechanism, and the flatness of the graphite paper 8 to be inspected is detected by the laser displacement sensor 11.

[0020] The longitudinal leveling mechanism also includes a through slot 12 on the testing platform 3. A telescopic cylinder 13 is fixedly connected to the top wall of the through slot 12. A longitudinal moving plate 14 is fixedly connected to the drive end of the telescopic cylinder 13. A guide tube 16 is fixedly connected to the end of the longitudinal moving plate 14 through a connecting plate 15. A sliding plate 17 is slidably inserted into the end of the guide tube 16. A telescopic spring is fixedly connected between the sliding plate 17 and the inner wall of the guide tube 16. A leveling rod 18 is fixed between the two sliding plates 17. A guide mechanism for pushing the sliding plate 17 to move is provided between the sliding plate 17 and the testing platform 3. The guide mechanism includes an electric telescopic rod 20 fixed to the rear side wall of the testing platform 3. A right-angled trapezoidal plate 19 is fixedly connected to the drive end of the electric telescopic rod 20. A placement opening 21 corresponding to the position of the electric telescopic rod 20 is opened on the outer wall of the right-angled trapezoidal plate 19. A sliding column 22 is fixedly connected to the outer wall of the sliding plate 17. After the graphite paper tube 5 rotates to unfold the graphite paper 8 to be inspected, it comes into contact with the inclined surface of the right-angled trapezoidal plate 19. Then, the telescopic cylinder 13 is activated. The telescopic cylinder 13 drives the longitudinal moving plate 14, connecting plate 15, guide tube 16, sliding plate 17, and pulling rod 18 to move downward. The sliding column 22 moves downward along the inclined surface of the right-angled trapezoidal plate 19, gradually pushing the sliding column 22, sliding plate 17, and pulling rod 18 to the rear, so that the pulling rod 18 moves downward. During the process, the flattening rod 18 moves backward and slowly approaches the graphite paper 8 to be inspected and comes into contact with it. When the sliding column 22 transitions from the inclined plane to the straight surface of the right-angled trapezoidal plate 19, the flattening rod 18 and the inspection platform 3 press against the graphite paper 8 to be inspected. The flattening rod 18 stops moving backward but can continue to move downward, thereby pulling the lower end of the graphite paper 8 to be inspected downward and flattening it, removing the folds on the graphite paper 8, so that the inspection work can be carried out stably.

[0021] Furthermore, the distance between the right-angled trapezoidal plate 19 and the detection platform 3 can be adjusted by the electric telescopic rod 20. When the distance between the right-angled trapezoidal plate 19 and the detection platform 3 increases, the sliding column 22 and the leveling rod 18 move backward by a greater range, and the distance between the leveling rod 18 and the detection platform 3 decreases, making the leveling rod 18 suitable for leveling thinner graphite paper 8. When the graphite paper 8 is thicker, the drive end of the electric telescopic rod 20 retracts, reducing the distance between the right-angled trapezoidal plate 19 and the detection platform 3. The sliding column 22 moves downward by a larger range before contacting the inclined surface of the right-angled trapezoidal plate 19. If the sliding column 22 continues to move downward, it will quickly transition to the straight surface of the right-angled trapezoidal plate 19, thereby reducing the backward movement of the leveling rod 18, making the leveling rod 18 suitable for leveling thicker graphite paper 8. By adjusting the position of the right-angled trapezoidal plate 19, the leveling rod 18 can be used for leveling graphite paper 8 of different thicknesses.

[0022] The transverse leveling mechanism also includes symmetrically arranged grooves 23 on the leveling rod 18. A movable plate 24 is slidably arranged within the groove 23. A return spring 25 is fixedly connected between the movable plate 24 and the inner wall of the groove 23. A pressing push plate 27 is fixedly connected to the adjacent ends of the two movable plates 24. A drive motor 28 is fixedly connected to the middle of the leveling rod 18. A lever plate 29, which contacts the outer wall of the pressing push plate 27, is fixedly connected to the drive end of the drive motor 28. A groove 30 is provided on the side of the leveling rod 18 near the graphite paper 8 to be inspected. A leveling plate 26 is slidably arranged within the groove 30. The thickness of the groove 30 is the same as the thickness of the leveling plate 26. The consistent size ensures that the platen 26 can slide within the groove 30, allowing the platen 26 and the flattening rod 18 to move synchronously. After the flattening rod 18 contacts the graphite paper 8 to be inspected, the extrusion push plate 27 is set in a "C" shape. The drive motor 28 is started to drive the dial plate 29 to rotate. The dial plate 29 contacts the outer wall of the extrusion push plate 27, pushing the extrusion push plate 27, the moving plate 24, and the platen 26 to move outward, so that the horizontally folded part of the graphite paper 8 to be inspected unfolds. Through the joint work of the horizontal flattening mechanism and the vertical flattening mechanism, the horizontally folded and vertically folded parts of the graphite paper 8 to be inspected are removed, thereby ensuring the accuracy of the test results.

[0023] An adjusting motor 2 is fixedly connected to the upper side wall of the fixed base 1. The lower end of the detection platform 3 is fixed to the outer wall of the driving end of the adjusting motor 2. The detection platform 3 has multiple detection ports 31 arranged horizontally. Graphite paper pressure sensors 32 are installed in the detection ports 31. Two pneumatic suction cups 33 are provided on the surface of the detection platform 3. After the graphite paper 8 to be tested is fully flattened, the pneumatic suction cups 33 are activated to tighten the graphite paper 8 to be tested. Then, the adjusting motor 2 is activated to drive the detection platform 3 to rotate. The detection platform 3 rotates from vertical to horizontal. At this time, the graphite paper 8 to be tested comes into contact with the graphite paper pressure sensor 32. The graphite paper pressure sensor 32 detects the pressure at the contact position with the graphite paper 8 to be tested. If there is an uneven contact position, the pressure detected by the graphite paper pressure sensor 32 will be different. Combined with the detection data of the laser displacement sensor 11, the detection result is more accurate by combining the two.

[0024] The specific procedure for testing the surface flatness of graphite paper 8 includes: The graphite paper tube 5 rotates to make the graphite paper 8 to be inspected rotate downwards. Then the rotating roller 4 stops rotating and the clamping plate 7 is inserted into the rotating roller 4 to prevent the rotating roller 4 from rotating. The telescopic cylinder 13 is activated, which drives the longitudinal plate 14 to move downward. The sliding column 22 moves downward along the inclined surface of the right-angled trapezoidal plate 19, gradually pushing the sliding column 22, the sliding plate 17, and the pulling rod 18 to the rear. As the pulling rod 18 moves downward, it moves backward synchronously and slowly approaches the graphite paper 8 to be inspected and comes into contact with it. When the sliding column 22 transitions from the inclined surface to the straight surface of the right-angled trapezoidal plate 19, the pulling rod 18 and the detection platform 3 press against the graphite paper 8 to be inspected. The pulling rod 18 stops moving backward but can continue to move downward, thereby pulling the lower end of the graphite paper 8 to be inspected downward and flattening it. After the flattening rod 18 contacts the graphite paper 8 to be inspected, the drive motor 28 is started to drive the dial plate 29 to rotate. The dial plate 29 contacts the outer wall of the extrusion push plate 27, pushing the extrusion push plate 27, the moving plate 24 and the flattening plate 26 to move outward, so that the horizontally folded part of the graphite paper 8 to be inspected unfolds. After the graphite paper 8 to be inspected is flattened, the distance between the graphite paper 8 to be inspected and the laser displacement sensor 11 is calculated by the laser displacement sensor 11. If the distance is different, it indicates that the surface of the graphite paper 8 to be inspected is not flat. After the laser detection is completed, the adjustment motor 2 is started to drive the detection platform 3 to rotate. The detection platform 3 rotates from vertical to horizontal. At this time, the graphite paper 8 to be inspected comes into contact with the graphite paper pressure sensor 32. The pressure at the contact position of the graphite paper 8 to be inspected is detected by the graphite paper pressure sensor 32. If the pressure is not equal, it indicates that the surface of the graphite paper 8 to be inspected is not flat. After the inspection of one section of graphite paper 8 is completed, the drive end of the telescopic cylinder 13 retracts, the clamping plate 7 moves down to release the lock of the rotating roller 4, and the graphite paper tube 5 continues to rotate to unfold the graphite paper 8 to be inspected. The above work is repeated to inspect the next section of graphite paper 8.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A graphite paper surface flatness detection device, comprising a fixed base (1), characterized in that, A detection platform (3) is connected to the fixed base (1). A graphite paper tube (5) is installed on the detection platform (3). The graphite paper tube (5) is wrapped with graphite paper (8) to be inspected. A rotating motor (9) is fixedly connected to the outer wall of the detection platform (3). A cylinder is fixedly connected to the driving end of the rotating motor (9). A rotating plate (10) located outside the graphite paper (8) to be inspected is fixedly connected to the driving end of the cylinder. Laser displacement sensors (11) are evenly distributed on the side of the rotating plate (10) close to the graphite paper (8) to be inspected. A longitudinal flattening mechanism is provided on the detection platform (3). A transverse flattening mechanism is installed on the longitudinal flattening mechanism. The longitudinal flattening mechanism includes a flattening rod (18) that is close to the graphite paper (8) to be inspected and moves longitudinally. The transverse flattening mechanism includes a flattening plate (26) that is installed on the flattening rod (18) and moves transversely. The folds of the graphite paper (8) to be inspected are eliminated by the longitudinal flattening mechanism and the transverse flattening mechanism, and the flatness of the graphite paper (8) to be inspected is detected by the laser displacement sensor (11).

2. The graphite paper surface flatness detection device according to claim 1, characterized in that, The detection platform (3) is equipped with a rotating roller (4), and the graphite paper tube (5) is fixedly sleeved on the outer wall of the rotating roller (4). The end of the rotating roller (4) has a notch. The detection platform (3) is equipped with a cylinder (6), and the driving end of the cylinder (6) is fixedly connected to a clamping plate (7) that matches the notch. The clamping plate (7) is inserted into the notch to prevent the rotating roller (4) from rotating.

3. The graphite paper surface flatness detection device according to claim 1, characterized in that, An adjustment motor (2) is fixedly connected to the upper side wall of the fixed base (1), and the lower end of the detection platform (3) is fixed to the outer wall of the drive end of the adjustment motor (2).

4. The graphite paper surface flatness detection device according to claim 1, characterized in that, The detection platform (3) has multiple detection ports (31) arranged in a horizontal row, and a graphite paper pressure sensor (32) is installed in the detection port (31).

5. The graphite paper surface flatness detection device according to claim 1, characterized in that, The longitudinal leveling mechanism also includes a through groove (12) opened on the detection platform (3). A telescopic cylinder (13) is fixedly connected to the top wall of the through groove (12). A longitudinal moving plate (14) is fixedly connected to the driving end of the telescopic cylinder (13). A guide tube (16) is fixedly connected to the end of the longitudinal moving plate (14) through a connecting plate (15). A sliding plate (17) is slidably inserted into the end of the guide tube (16). A telescopic spring is fixedly connected between the sliding plate (17) and the inner wall of the guide tube (16). The leveling rod (18) is fixed between the two sliding plates (17). A guide mechanism for moving the sliding plate (17) is provided between the sliding plate (17) and the detection platform (3). The guide mechanism includes an electric telescopic rod (20) fixed to the rear side wall of the detection platform (3). A right-angled trapezoidal plate (19) is fixedly connected to the driving end of the electric telescopic rod (20). The outer wall of the right-angled trapezoidal plate (19) has a placement opening (21) corresponding to the position of the electric telescopic rod (20). A sliding column (22) is fixedly connected to the outer wall of the sliding plate (17). The sliding column (22) is in contact with the inclined surface of the right-angled trapezoidal plate (19).

6. The graphite paper surface flatness detection device according to claim 1, characterized in that, The transverse flattening mechanism also includes symmetrically opened grooves (23) on the flattening rod (18). A movable plate (24) is slidably arranged in the groove (23). A return spring (25) is fixedly connected between the movable plate (24) and the inner wall of the groove (23). A pressing push plate (27) is fixedly connected to the end of each of the two movable plates (24) that are close to each other. A drive motor (28) is fixedly connected to the middle of the flattening rod (18). A lever plate (29) is fixedly connected to the drive end of the drive motor (28) and is in contact with the outer wall of the pressing push plate (27). A groove (30) is opened on the side of the flattening rod (18) near the graphite paper (8) to be inspected. The flattening plate (26) is slidably arranged in the groove (30).

7. The graphite paper surface flatness detection device according to claim 6, characterized in that, The thickness of the groove (30) is the same as the thickness of the flat plate (26).

8. The graphite paper surface flatness detection device according to claim 1, characterized in that, The surface of the detection platform (3) is provided with two pneumatic suction cups (33).

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