High-precision positioning device and positioning method for hydrogen energy bipolar plate manufacturing equipment

Abstract

The invention discloses a high-precision positioning device and a positioning method for hydrogen energy bipolar plate manufacturing equipment, and particularly relates to the technical field of hydrogen energy bipolar plate manufacturing, the high-precision positioning device comprises a detection table, and a flip table is arranged on the top surface of the detection table; the scanning assembly is arranged on the inner top surface of the flip table and used for scanning and positioning the hydrogen energy bipolar plate, the scanning assembly comprises a detection groove, a coding grating is emitted through a structured light camera, an image is collected, and the surface of the hydrogen energy bipolar plate is scanned in a non-contact mode through a triangulation method; high-precision point cloud data of key characteristics such as the three-dimensional shape, flatness and welding groove size of the runner are directly obtained, absolute digital reference is provided for intelligent positioning, and the positioning platform can be driven to carry a workpiece to execute precise rectangular track motion through the driving motor, the closed chain and the moving point. And the view field of the structured light camera can traverse each punched hole and each flow channel on the surface of the bipolar plate, so that global three-dimensional data acquisition is realized.

Description

Technical Field

[0001] This invention relates to the field of hydrogen energy bipolar plate manufacturing technology, specifically to a high-precision positioning device and positioning method for hydrogen energy bipolar plate manufacturing equipment. Background Technology

[0002] Hydrogen bipolar plates are the core components of hydrogen fuel cells, mainly used to support membrane electrode assemblies, separate reactant gases, conduct electricity, and facilitate fluid transport. Bipolar plates play multiple key roles in the fuel cell stack: separating hydrogen and air (oxygen), and uniformly delivering the gas to the membrane electrode area where the reaction occurs through precisely machined flow channels; collecting the current generated by the electrochemical reaction and establishing electrical conductivity between the series-connected individual cells; discharging the water produced by the reaction and dissipating the generated heat to maintain the stable operation of the fuel cell stack. Two stamped monopolar plates need to be welded back to back to form a complete bipolar plate.

[0003] Existing technologies mostly rely on preset physical positioning pins or contour blocks for rough fixing. This contact-based, localized positioning method cannot adapt to the micro-warping, elastic deformation, and batch-to-batch dimensional tolerances caused by stamping and transportation of bipolar plates. Using localized hard contact to constrain plates that may have macroscopic deformation introduces assembly stress, resulting in an unmeasurable "false" deviation between the actual mating surface and the ideal state. This creates hidden dangers for subsequent welding quality. The alignment process is highly dependent on the operator's experience and visual judgment, and is roughly aligned through simple optical projection or two-dimensional images. This method cannot obtain comprehensive data on the three-dimensional shape of the plate, nor can it quantitatively evaluate key features such as flatness and flow channel depth. The entire positioning process is "open-loop," lacking real-time data feedback and automated deviation compensation mechanisms, resulting in poor product consistency and large fluctuations in yield. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-precision positioning device and method for hydrogen energy bipolar plate manufacturing equipment, thereby solving the problems mentioned in the background art.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A high-precision positioning device and method for hydrogen energy bipolar plate manufacturing equipment includes a detection platform with a flip-top on its top surface; a scanning component disposed on the inner top surface of the flip-top for scanning and positioning the hydrogen energy bipolar plate; the scanning component includes a detection slot formed on the inner top surface of the flip-top, with a structured light camera fixedly installed inside the detection slot; a mounting plate fixedly installed on the top surface of the detection platform; two protective frames fixedly installed on the top surface of the mounting plate; a moving stage disposed on the top surface of the two protective frames; a positioning platform fixedly installed on the top surface of the moving stage; a directional displacement component disposed on the top surface of the mounting plate for adjusting the position of the hydrogen energy bipolar plate; a fine-tuning component disposed on the top surface of the detection platform for precision adjustment of the position of the hydrogen energy bipolar plate; and a clamping component disposed on the bottom surface of the positioning platform for stable clamping of the hydrogen energy bipolar plate.

[0006] By adopting the above technical solution and using a structured light camera, when workers are positioning the hydrogen bipolar plate in production, the hydrogen bipolar plate can first be placed on the top surface of the positioning platform. Then, the structured light camera can be used to scan the hydrogen bipolar plate, thereby directly obtaining point cloud data of key features such as the three-dimensional morphology, flatness, and welding groove size of the hydrogen bipolar plate flow channel. Then, with the help of the directional displacement component and the fine-tuning component, the subsequent positioning work can be completed.

[0007] Preferably, the directional displacement assembly includes: two mounting rods spaced apart; two fixed columns fixedly mounted on the top surfaces of the two mounting rods; two fixed columns spaced apart; two sliding columns fixedly mounted between the two fixed columns; two fixed plates fixedly mounted on the bottom surfaces of the two fixed columns; two circular through holes on the top surfaces of the fixed plates; a rotating column movably sleeved on the inner wall of the circular through holes; a first gear fixedly mounted on the top surface of the rotating column; a drive motor fixedly mounted on the bottom surface of the fixed plates; the drive shaft of the drive motor fixedly mounted to the rotating column; a closed chain externally meshing with several first gears; an adjustment platform between the two fixed columns; the adjustment platform movably sleeved with the sliding columns; a sliding hole on the top surface of the adjustment platform; a moving point slidably connected inside the sliding hole; the moving point fixedly mounted to the closed chain; a connecting platform fixedly mounted on the top surface of the moving point; and the connecting platform fixedly mounted to the moving platform.

[0008] By adopting the above technical solution, the movable stage, driven by a drive motor, rotates the first rotating column and the first gear, which in turn transmits the rotational power to the closed chain. Since the closed chain is a closed rectangle, its rotation drives the other three first gears to rotate, thus propelling the closed chain along a rectangular trajectory between the two fixed columns. As the closed chain rotates, it moves the moving point. This longitudinal movement of the moving point pushes the adjusting platform onto the sliding column, and further, it causes the connecting platform, the movable stage, and the positioning platform to move longitudinally. When the moving point moves laterally, the adjusting platform stops moving. The moving point slides inside the sliding hole under the drive of the closed chain. At this time, the moving point will drive the connecting platform, the moving platform, and the positioning platform to move laterally. Following this movement, the moving point will drive the connecting platform, the moving platform, and the positioning platform to move in a rectangular trajectory. Since the perforations on the hydrogen bipolar plate are uniformly arranged, the structured light camera is then used to scan the entire flow channel surface of the upper and lower monopolar plates to obtain three-dimensional point cloud data containing all flow channels, holes, and boundaries. Thus, by following the rectangular path of the positioning platform, each perforation on the monopolar plate can be scanned individually, which facilitates the mutual positioning of the two monopolar plates by means of the perforations or special points on the two monopolar plates.

[0009] Preferably, the fine-tuning component includes: a support frame, which is fixedly installed on the top surface of the testing platform; a first worm and a second worm are disposed between the testing platform and the support frame; a first servo motor is fixedly installed on one side of the support frame, and the drive shaft of the first servo motor passes through the support frame and is fixedly installed with the first worm; a second servo motor is fixedly installed on the inner side of the testing platform, and the drive shaft of the second servo motor is fixedly installed with the second worm; a worm wheel is meshed between the first worm and the second worm; a connecting column is fixedly installed on the top surface of the worm wheel; a second gear is fixedly installed on the top surface of the connecting column; a sliding frame is provided on the top surface of the worm wheel; the sliding frame is movably sleeved with the connecting column; a rack is slidably connected inside the sliding frame; the rack meshes with the second gear; a support rod is movably sleeved inside the sliding frame; connecting plates are fixedly installed at both ends of the rack and the support rod; a guide hole is provided on one side of the sliding frame; and two guide rods are fixedly installed between the inner side of the testing platform and the support frame, and the guide rods are slidably connected with the guide hole.

[0010] By adopting the above technical solution, with the rack and pinion mechanism, and the first and second servo motors positioned opposite each other, when the drive shaft of the first servo motor drives the first worm to rotate clockwise, the drive shaft of the second servo motor drives the second worm to rotate clockwise. Since the worm wheel is between the first and second worms, the clockwise rotation of the first and second worms will engage, causing the worm wheel to rotate clockwise. The worm wheel, in turn, will drive the second gear to rotate via the connecting column. Conversely, when the drive shafts of the first and second servo motors drive the first and second worms to rotate counterclockwise, the first and second worms will drive the worm wheel to rotate counterclockwise. The worm wheel, in turn, will drive the second gear to rotate counterclockwise via the connecting column. Through the rotation of the second gear, the second gear will mesh with the rack, causing the rack to move the support rod and connecting plate laterally. Through the forward and reverse rotation of the second gear, the rack, The support rod and connecting plate move left and right. When the first servo motor and the second servo motor drive the first worm and the second worm to move forward and backward simultaneously, the teeth of the first worm and the second worm will rotate in the same direction. Because the worm wheel will be stuck by the teeth of the first worm and the second worm and will not rotate, the teeth of the first worm and the second worm and the worm wheel will simultaneously intersect, so that the worm wheel can move linearly along the outer wall of the first worm and the second worm. Then the worm wheel will drive the second gear, sliding frame, support rod, connecting plate, mounting rod, connecting platform, moving platform and positioning platform to move longitudinally, so as to facilitate the fine adjustment of the position of the hydrogen energy bipolar plate, so that the initial center position of the hydrogen energy bipolar plate is aligned with the structured light camera. At the same time, it can also align the first punch or special point of the hydrogen energy bipolar plate with the structured light camera. Then, the directional displacement component is used to run the hydrogen energy bipolar plate in a rectangular trajectory, so that the punch and special point of the two single plates are aligned with each other.

[0011] Preferably, the clamping assembly includes: a plurality of limiting holes, all of which are formed on the bottom surface of the positioning platform; a slider is slidably connected inside the limiting holes; a clamping block is fixedly installed on the top surface of the slider; a reserved groove is formed on the bottom surface of the positioning platform; a shrinking disc is provided inside the reserved groove; a plurality of pull rods are provided on the bottom surface of the shrinking disc; a rotating column and a pulling column are fixedly installed on the top surface of the pull rods; a plurality of rotating holes are formed on the bottom surface of the shrinking disc; a force-receiving groove is formed on the bottom surface of the slider; the pulling column is movably sleeved with the force-receiving groove; the rotating column is movably sleeved with the rotating hole; a stepper motor is fixedly installed inside the moving stage; the drive shaft of the stepper motor is fixedly installed with the shrinking disc; moving blocks are fixedly installed on both sides of the slider; sliding grooves are formed on both sides of the limiting holes; and the moving blocks are slidably connected with the sliding grooves.

[0012] By adopting the above technical solution, and through the set shrink plate, after the hydrogen bipolar plate is placed on the top surface of the positioning platform, the shrink plate will rotate by using a stepper motor. The rotation of the stepper motor drive shaft will drive the shrink plate to rotate. When the shrink plate rotates, it will drive the rotating column to move. In turn, the rotating column will drive the pull rod and the pulling column to move. At the same time, the pulling column rotates around the force groove and pulls the slider to move towards the position of the shrink plate. At this time, multiple sliders and clamping blocks move towards the position of the shrink plate simultaneously, and the hydrogen bipolar plate is between multiple clamping blocks. Then the clamping blocks will contact the side of the hydrogen bipolar plate, thereby facilitating the clamping of the hydrogen bipolar plate.

[0013] Preferably, the clamping block is internally provided with a pressure detection component for detecting the clamping force of the clamped hydrogen bipolar plate. The pressure detection component includes: a plurality of mounting slots, which are respectively formed inside the plurality of clamping blocks. Each clamping block has two layers of mounting slots, which are L-shaped. A plurality of compression springs are fixedly installed on both sides of the mounting slot. Two detection plates are movably sleeved inside the mounting slot. The detection plates are fixedly installed with the compression springs. The two detection plates are arranged in an L-shape. A limiting slot is formed on one side of the detection plate. A pressure sensor is fixedly installed inside the limiting slot.

[0014] By adopting the above technical solution, and through the pressure sensors, when the four corners of the monopolar plate enter the interior of the four clamping blocks respectively, the four corners of the monopolar plate will squeeze the pressure sensors and compress the detection plate and compression spring. At this time, the pressure sensors will detect the clamping pressure of the four corners of the hydrogen energy bipolar plate. Subsequently, by placing the second monopolar plate on the top surface of the first monopolar plate, and the four corners of the second monopolar plate will squeeze the pressure sensor on the upper layer, the clamping pressure of the two monopolar plates can be detected separately. When the pressure of the two monopolar plates is different, it indicates that the size or shape of the two monopolar plates is not compatible, and positioning welding cannot be completed.

[0015] Preferably, a fixing groove is provided on one side of the moving platform, and a miniature vacuum pump is fixedly installed inside the fixing groove. An air extraction pipe is fixedly sleeved on the outside of the air extraction port of the miniature vacuum pump. A diverter pipe is fixedly installed on the top surface of the moving platform. The diverter pipe is fixedly installed with the air extraction pipe and extends into the interior of the diverter pipe. Two connecting pipes are fixedly installed on the outer circular wall of the diverter pipe and extend into the interior of the diverter pipe. Two air grooves are provided on one side of the positioning platform and are fixedly sleeved with the connecting pipes. A plurality of adsorption holes are provided on the top surface of the positioning platform and are connected to the air grooves.

[0016] By adopting the above technical solution, through the set adsorption holes, the operator can place the first monopolar plate as a standard reference plate on the top surface of the positioning platform. After the position of the first reference plate is adjusted, a micro vacuum pump is used to evacuate the inside of the air tank through the air extraction pipe, the diversion pipe and the connecting pipe, and conduct the air to the top surface of the positioning platform through the adsorption holes, so as to facilitate the adsorption and locking of the first reference monopolar plate. Then the clamping block can be moved and adjusted at will.

[0017] Preferably, a PLC controller is fixedly installed on one side of the testing platform, and two indicator lights are fixedly installed on one side of the testing platform. The PLC controller is electrically connected to the indicator lights and to the structured light camera.

[0018] By adopting the above technical solution, and using a structured light camera, one indicator light is red and the other is green. When the two monopolar plates are overlapped and scanned by the structured light camera, if the two monopolar plates can be completely overlapped, the structured light camera will transmit a signal to the PLC controller, and then the PLC controller will transmit a signal to the indicator light, and the green light will light up. If the two monopolar plates cannot be completely overlapped, the red light will light up.

[0019] Preferably, support plates are fixedly installed on both sides of the testing platform, and a central column is fixedly installed between the two support plates. Two snap-fit ​​springs are fixedly installed on the outer circular wall of the central column. A rotating hole is opened on one side of the flip-top platform, and a plurality of snap-fit ​​grooves are opened on the inner circular wall of the rotating hole. The central column is movably sleeved with the rotating hole, and the snap-fit ​​springs are movably snapped with the snap-fit ​​grooves.

[0020] By adopting the above technical solution, and through the set flip-top platform, when the structured light camera has finished scanning, the staff can directly perform welding or other operations on the top surface of the positioning platform. By rotating the flip-top platform, the central column rotates around the inside of the rotating hole, and the snap-fit ​​springs will alternately snap between multiple snap-fit ​​slots, thereby removing the flip-top platform from the top surface of the positioning platform.

[0021] This invention also provides a high-precision positioning method for hydrogen energy bipolar plate manufacturing equipment, the specific steps of which are as follows: S1: Workpiece placement and reference establishment. The operator places the first reference monopolar plate on the positioning platform, starts the equipment, and the clamping assembly automatically moves to center and flexibly clamp the plate. Then, the vacuum adsorption assembly starts to firmly adsorb and fix the reference plate on the platform, establishing an immovable absolute coordinate reference. The clamping assembly then releases and resets. S2: Full-domain 3D data acquisition drives the directional displacement component, enabling the positioning platform to carry the reference plate along a preset rectangular trajectory. At the same time, the structured light camera continuously scans the moving plate to obtain complete 3D point cloud data of all punches, flow channels and boundaries on its surface, and uploads it to the control system. S3: Placement and initial positioning of the board to be welded. Place the second single plate to be welded on the fixed reference plate. The clamping assembly moves again, clamping the upper and lower plates tightly. The integrated pressure detection assembly starts working, monitoring and comparing the clamping force at the four corners of the two plates in real time. If the pressure distribution difference exceeds the set threshold, the system alarms and indicates that the plates are mismatched. S4: Intelligent visual matching and deviation calculation. The structured light camera performs a secondary scan on the two stacked monopole plates. The control system performs intelligent three-dimensional feature matching and comparison between the point cloud data of this scan and the reference plate data in step S2. It quickly calculates the six-degree-of-freedom pose deviation between the second plate and the target position in the current state, including X, Y, Z translation and rotation around the three axes. S5: High-precision closed-loop fine-tuning. Based on the pose deviation calculated by S4, the system commands the fine-tuning component to move. By precisely controlling the direction and speed of the first servo motor and the second servo motor, the carrier platform is driven to perform micron-level translation in the horizontal X and vertical Y directions. If necessary, it can be combined with the directional displacement component for angle rotation compensation until the second plate and the reference plate are completely aligned in three-dimensional space. S6: Alignment confirmation and result output. After fine-tuning, the structured light camera can perform a final verification scan. When the system confirms that the key features of the two monopole plates have reached the set accuracy standard, the PLC controller lights up the green indicator light and locks the current platform position, ready to perform welding. If the standard is not met, the red indicator light will light up, indicating that it is necessary to check or reoperate.

[0022] In summary, the present invention has the following main beneficial effects: 1. This invention uses a structured light camera to emit coded gratings and acquire images. It then uses triangulation to non-contactly scan the surface of a hydrogen bipolar plate, directly obtaining high-precision point cloud data of key features such as the three-dimensional morphology of the flow channel, flatness, and weld bevel dimensions. This provides an absolute digital benchmark for intelligent positioning. A drive motor, closed chain, and moving point enable the driving positioning platform to carry the workpiece in precise rectangular trajectory motion. This allows the structured light camera's field of view to traverse every perforation and flow channel on the bipolar plate surface, achieving full-domain three-dimensional data acquisition and providing complete information for high-precision alignment. By combining "structured light scanning + rectangular trajectory motion," complete three-dimensional data of the workpiece is acquired. Compared to traditional contact or local positioning methods, this provides a more comprehensive and accurate positioning benchmark.

[0023] 2. This invention utilizes an innovative design with a symmetrical dual worm gear driving the worm wheel, employing a first servo motor, a second servo motor, a worm, and a worm wheel. This design enables independent, uncoupled motion of the platform in two degrees of freedom within the XY plane. By controlling the steering combination of the two servo motors, the platform can be driven to perform micro-motion along the X-axis or the Y-axis, achieving sub-millimeter-level initial alignment and quickly aligning the workpiece's reference features with the center of the camera's field of view. The symmetrical dual worm gear driving the worm wheel design uses only one set of mechanisms and motor steering to achieve independent, uncoupled micro-motion in the XY directions. The structure is compact, the control is precise, and it solves the problem of multi-axis crosstalk in traditional platforms.

[0024] 3. This invention uses a shrinking disc, a stepper motor, and clamping blocks. The central shrinking disc drives multiple radially distributed clamping blocks to move synchronously towards the center, achieving automatic centering and flexible clamping of hydrogen bipolar plates, eliminating manual placement errors, and without damaging the workpiece surface.

[0025] 4. This invention uses pressure sensors, compression springs, and detection plates to set up two independent tactile sensing units inside the clamping block. By comparing the pressure data of the upper and lower plates, it can automatically determine whether the size, flatness, or shape of the two plates match, thus preventing welding defects from the source. Through the independently arranged pressure sensors, the size and shape matching of the upper and lower plates can be determined online before positioning, allowing unqualified parts to be rejected in advance, improving the welding yield and reducing the risk of scrap in subsequent processes.

[0026] 5. This invention generates a uniform negative pressure on the top surface of the positioning platform through a micro vacuum pump, adsorption holes, and air grooves. This allows the "standard reference plate" used as a benchmark to be absolutely adsorbed and locked, thereby releasing the clamping mechanism and achieving a high-precision alignment mode of "fixed benchmark and adjustable operation object". This completely eliminates the micro-displacement introduced by the clamping force. By fixing the benchmark plate through vacuum adsorption, it replaces the traditional mechanical clamping method and completely eliminates the micro-deformation or displacement of the benchmark plate that may be caused by the clamping force, providing a stable reference basis for ultra-precision alignment.

[0027] 6. The present invention integrates a flip-up protective cover for a structured light camera. During scanning, it serves as a protective cover to prevent dust and stabilize the measurement environment. During welding or operation, it can be flipped open and locked to provide a full-width working surface for welding torches and other tools without interference, ensuring safe and convenient operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the detection stage structure of the present invention; Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure at point AA; Figure 4This is a schematic diagram of the flip-top structure of the present invention; Figure 5 This is a schematic diagram of the central column structure of the present invention; Figure 6 This is a schematic diagram of the protective frame structure of the present invention; Figure 7 This is a schematic diagram of the mounting plate structure of the present invention; Figure 8 This is a schematic diagram of the support frame structure of the present invention; Figure 9 This is a schematic diagram of the fixed column structure of the present invention; Figure 10 This is a schematic diagram of the sliding frame structure of the present invention; Figure 11 This is a schematic diagram of the positioning platform structure of the present invention; Figure 12 This is a schematic diagram of the mobile station structure of the present invention; Figure 13 This is a schematic diagram of the shrink disc structure of the present invention; Figure 14 This is a schematic diagram of the clamping block structure of the present invention; Figure 15 yes Figure 14 A magnified schematic diagram of a local structure of B.

[0029] Reference numerals: 1. Inspection table; 2. Flip-top table; 3. Inspection slot; 4. Structured light camera; 5. Mounting plate; 6. Protective frame; 7. Moving table; 8. Positioning platform; 9. Mounting rod; 10. Fixed column; 11. Sliding column; 12. Fixed plate; 13. Rotating column; 14. First gear; 15. Drive motor; 16. Closed chain; 17. Adjusting table; 18. Sliding hole; 19. Moving point; 20. Connecting table; 21. Support frame; 22. First worm gear; 23. Second worm gear; 24. Worm wheel; 25. Second gear; 26. Sliding frame; 27. Rack; 28. Support rod; 29. ​​Connecting plate; 30. Guide hole; 31. Guide rod; 32. First servo motor; 33. ... 34. Servo motor; 35. Connecting column; 36. Limiting hole; 37. Slider; 38. Clamping block; 39. Reserved slot; 40. Shrink plate; 41. Pull rod; 42. Rotating column; 43. Rotating hole; 44. Force groove; 45. Mounting groove; 46. Compression spring; 47. Detection plate; 48. Limiting groove; 49. Pressure sensor; 50. Moving block; 51. Sliding groove; 52. Stepper motor; 53. Fixing groove; 54. Miniature vacuum pump; 55. Evacuation pipe; 56. Diverter pipe; 57. Connecting pipe; 58. Air groove; 59. Adsorption hole; 60. Indicator light; 61. Support plate; 62. Rotating hole; 63. Snap-fit ​​groove; 64. Center column; 65. Snap-fit ​​spring. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 A high-precision positioning device and positioning method for hydrogen energy bipolar plate manufacturing equipment includes a detection table 1, a flip-top platform 2 on the top surface of the detection table 1, a scanning component on the inner top surface of the flip-top platform 2 for scanning and positioning the hydrogen energy bipolar plate, the scanning component including a detection slot 3, the detection slot 3 being opened on the inner top surface of the flip-top platform 2, a structured light camera 4 being fixedly installed inside the detection slot 3, a mounting plate 5 being fixedly installed on the top surface of the detection table 1, two protective frames 6 being fixedly installed on the top surface of the mounting plate 5, a moving stage 7 being provided on the top surface of the two protective frames 6, and a positioning platform 8 being fixedly installed on the top surface of the moving stage 7; refer to Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Figure 9 The top surface of the mounting plate 5 is provided with a directional displacement assembly for adjusting the position of the hydrogen energy bipolar plate. The directional displacement assembly includes two mounting rods 9, which are spaced apart. Two fixing posts 10 are fixedly installed on the top surface of the two mounting rods 9, which are spaced apart. Two sliding posts 11 are fixedly installed between the two fixing posts 10. Two fixing plates 12 are fixedly installed on the bottom surface of the two fixing posts 10. Two circular through holes are opened on the top surface of the fixing plates 12. A rotating post 13 is movably fitted onto the inner wall of the circular through holes. A first [missing information - likely a device or component] is fixedly installed on the top surface of the rotating post 13. A drive motor 15 is fixedly installed on the bottom surface of the gear 14 and the fixed plate 12. The drive shaft of the drive motor 15 is fixedly installed on the rotating column 13. A closed chain 16 is externally meshed with several first gears 14. An adjustment platform 17 is provided between two fixed columns 10. The adjustment platform 17 is movably sleeved with the sliding column 11. A sliding hole 18 is opened on the top surface of the adjustment platform 17. A moving point 19 is slidably connected inside the sliding hole 18. The moving point 19 is fixedly installed on the closed chain 16. A connecting platform 20 is fixedly installed on the top surface of the moving point 19. The connecting platform 20 is fixedly installed on the moving platform 7. Using the structured light camera 4, the operator places the hydrogen bipolar plate to be processed on the positioning platform 8. Then, the structured light camera 4 is activated to perform high-speed, non-contact 3D scanning of the plate, directly acquiring high-density point cloud data of key features such as the 3D morphology of its surface flow channels, global flatness, and welding bevel size. These data constitute the absolute benchmark for subsequent intelligent positioning. Based on this data, the system's main control unit drives the directional displacement component and the fine-tuning component to work together, ultimately achieving sub-millimeter-level precision positioning of the plate. With the movable stage 7 in place, the system aims to achieve full coverage of the workpiece surface by measuring the field of view. The drive motor 15 serves as the power source, and its output shaft drives the active rotating column 13 and the first gear 14 fixed to it to rotate. The power is transmitted to the closed chain 16 through gear meshing, driving this rectangular closed-loop chain to move along the track formed by the fixed column 10 in a rectangular trajectory. The moving point 19 fixed to the chain moves accordingly. When it moves longitudinally, it pushes the adjustment stage 17 to slide along the sliding column 11 and drives the upper module to move longitudinally. When it moves laterally, the adjustment stage 17 locks, and the moving point 19 slides laterally in the sliding hole 18, driving the upper module to move laterally. Through this compound motion, the connecting stage 20, the movable stage 7, and the positioning platform 8 are finally driven to carry the workpiece to perform precise rectangular path motion. This design allows the field of view of the structured light camera 4 to traverse every uniformly arranged punch and flow channel area on the surface of the bipolar plate, providing complete full-domain three-dimensional data for subsequent precise alignment based on feature points.

[0032] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 and Figure 10The top surface of the testing platform 1 is equipped with a fine-tuning component for precisely adjusting the position of the hydrogen bipolar plate. The fine-tuning component includes a support frame 21, which is fixedly installed on the top surface of the testing platform 1. A first worm gear 22 and a second worm gear 23 are arranged between the testing platform 1 and the support frame 21. A first servo motor 32 is fixedly installed on one side of the support frame 21, and the drive shaft of the first servo motor 32 passes through the support frame 21 and is fixedly installed with the first worm gear 22. A second servo motor 33 is fixedly installed on one side inside the testing platform 1, and the drive shaft of the second servo motor 33 is fixedly installed with the second worm gear 23. A worm wheel meshes between the first worm gear 22 and the second worm gear 23. 24. A connecting column 34 is fixedly installed on the top surface of the worm gear 24. A second gear 25 is fixedly installed on the top surface of the connecting column 34. A sliding frame 26 is provided on the top surface of the worm gear 24. The sliding frame 26 is movably connected to the connecting column 34. A rack 27 is slidably connected inside the sliding frame 26. The rack 27 is meshed with the second gear 25. A support rod 28 is movably connected inside the sliding frame 26. Connecting plates 29 are fixedly installed at both ends of the rack 27 and the support rod 28 respectively. A guide hole 30 is opened on one side of the sliding frame 26. Two guide rods 31 are fixedly installed between the inside side of the detection table 1 and the support frame 21. The guide rods 31 are slidably connected to the guide hole 30. The platform employs a symmetrical dual-drive design via the rack 27 to achieve precise pose adjustment of the positioning platform. The first servo motor 32 and the second servo motor 33 are mounted opposite each other, driving the first worm gear 22 and the second worm gear 23 to rotate respectively. When the two motors rotate in the same direction at the same speed, the two worm gears mesh together to drive the worm wheel 24 to rotate. The power is transmitted to the second gear 25 via the connecting column 34. The rotation of the second gear 25 is converted into meshing motion with the rack 27, thereby driving the support rod 28 and the connecting plate 29 to achieve lateral X-axis micro-motion. When the two motors rotate in opposite directions at the same speed, the helical lines of the two worms will jointly "clamp" the worm wheel 24, causing it to produce linear displacement along the worm axis. This displacement, in turn, drives the entire upper module, including the second gear 25, sliding frame 26, and support rod 28, to make longitudinal Y-axis micro-movements through the connecting structure. This innovative design allows a single mechanism to achieve high-precision positioning of the bearing platform in the XY plane independently and without coupling by controlling the rotation of the two motors. It can quickly align the initial center of the workpiece or the first reference feature to the center of the camera's field of view.

[0033] Based on the above embodiments, refer to Figure 1 , Figure 5 , Figure 6 , Figure 11 , Figure 12 , Figure 14 and Figure 15The bottom surface of the positioning platform 8 is provided with a clamping assembly for stabilizing the hydrogen energy bipolar plate. The clamping assembly includes several limiting holes 35, all of which are formed on the bottom surface of the positioning platform 8. A slider 36 is slidably connected inside the limiting holes 35, and a clamping block 37 is fixedly installed on the top surface of the slider 36. A reserved groove 38 is formed on the bottom surface of the positioning platform 8, and a shrink plate 39 is provided inside the reserved groove 38. Several pull rods 40 are provided on the bottom surface of the shrink plate 39, and a rotating column 4 is fixedly installed on the top surface of the pull rods 40. The bottom surface of the pull column 42 and the shrinking plate 39 is provided with several rotating holes 43, and the bottom surface of the slider 36 is provided with a force groove 44. The pull column 42 is movably connected to the force groove 44, and the rotating column 41 is movably connected to the rotating hole 43. The inside of the moving platform 7 is fixedly installed with a stepper motor 52. The drive shaft of the stepper motor 52 is fixedly installed with the shrinking plate 39. The two sides of the slider 36 are respectively fixedly installed with moving blocks 50. The two sides of the limiting hole 35 are respectively provided with sliding grooves 51, and the moving blocks 50 are slidably connected with the sliding grooves 51. The clamping block 37 is equipped with a pressure detection component for detecting the clamping force of the clamped hydrogen bipolar plate. The pressure detection component includes several mounting slots 45, which are respectively opened inside several clamping blocks 37. Each clamping block 37 has two layers of mounting slots 45, which are L-shaped. Several compression springs 46 are fixedly installed on both sides of the inside of the mounting slot 45. Two detection plates 47 are movably sleeved inside the mounting slot 45. The detection plates 47 are fixedly installed with the compression springs 46. The two detection plates 47 are arranged in an L-shape. A limiting slot 48 is opened on one side of the detection plate 47. A pressure sensor 49 is fixedly installed inside the limiting slot 48. This mechanism is used to automatically center and flexibly fix the workpiece before measurement. After the workpiece is placed on the positioning platform 8, the stepper motor 52 starts, driving the shrinking disc 39 to rotate. The eccentric structure on the shrinking disc drives the rotating column 41 to move, which in turn pulls the tie rod 40 and the pulling column 42 that are hinged to it. The pulling column 42 rotates around the force groove 44 as the fulcrum, transmitting radial force to multiple circumferentially distributed sliders 36, driving all sliders to synchronously shrink towards the center with the clamping blocks 37. The multiple clamping blocks 37 evenly contact and gently hold the edge of the hydrogen bipolar plate from all sides, so that it automatically corrects itself to the center of the platform and eliminates random position and angle deviations caused by manual placement. This is achieved by the pressure sensor. 49. Each clamping block 37 integrates a sensing unit consisting of a pressure sensor 49, a detection plate 47, and a compression spring 46. When a single plate is clamped, its four corners press against the detection plate 47, and the pressure is transmitted to the pressure sensor 49 through the compression spring 46 and is detected and recorded in real time. When the upper and lower plates are stacked and aligned, the pressure sensors corresponding to the upper and lower layers work independently to detect the clamping force on the two plates respectively. By comparing the pressure distribution and values ​​of the two layers of sensors, the system can intelligently determine whether the thickness, flatness, or shape of the two plates match. If there is a significant inconsistency in the pressure values, it is determined that the plates are unqualified or the alignment has failed, thus preventing the generation of welding defects from the source.

[0034] Based on the above embodiments, refer to Figure 1 , Figure 5 , Figure 11 and Figure 12 A fixed groove 53 is provided on one side of the moving platform 7. A micro vacuum pump 54 is fixedly installed inside the fixed groove 53. An exhaust pipe 55 is fixedly sleeved on the outside of the exhaust port of the micro vacuum pump 54. A diversion pipe 56 is fixedly installed on the top surface of the moving platform 7. The diversion pipe 56 is fixedly installed with the exhaust pipe 55. The exhaust pipe 55 extends into the inside of the diversion pipe 56. Two connecting pipes 57 are fixedly installed on the outer circular wall of the diversion pipe 56. The connecting pipes 57 extend into the inside of the diversion pipe 56. Two air grooves 58 are provided on one side of the positioning platform 8. The air grooves 58 are fixedly sleeved with the connecting pipes 57. Several adsorption holes 59 are provided on the top surface of the positioning platform 8. The adsorption holes 59 are connected to the air grooves 58. Through the suction holes 59, the operator can place a calibrated "standard reference plate" as the first plate on the positioning platform 8 and complete the centering and initial posture adjustment. Then, the micro vacuum pump 54 is started, and negative pressure is generated in the air groove 58 through the air extraction pipe 55, the diversion pipe 56 and the connecting pipe 57. The negative pressure is evenly applied to the back of the standard reference plate through the suction holes 59 on the platform surface, generating a strong suction force to firmly lock it on the platform. In this state, the position of the reference plate becomes an immovable absolute reference. At this time, the clamping mechanism 37 can be completely released and removed, thereby freeing up unobstructed space for placing and adjusting the second plate to be aligned. This achieves a high-precision alignment mode of "fixed reference and adjustable operation object", completely eliminating the slight displacement of the reference plate that may be introduced by the clamping force.

[0035] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A PLC controller is fixedly installed on one side of the testing platform 1. Two indicator lights 60 are also fixedly installed on one side of the testing platform 1. The PLC controller is electrically connected to the indicator lights 60 and the structure light camera 4. Through the structure light camera 4, one indicator light 60 is red and the other is green. When the two monopolar plates are overlapped and scanned by the structure light camera 4, the two monopolar plates can be completely overlapped. The structure light camera 4 will transmit a signal to the PLC controller, and then the PLC controller will transmit a signal to the indicator light 60, and the green light will light up. When the two monopolar plates cannot be completely overlapped, the red light will light up.

[0036] Based on the above embodiments, refer to Figure 1 , Figure 4 and Figure 5 Support plates 61 are fixedly installed on both sides of the testing platform 1. A central column 64 is fixedly installed between the two support plates 61. Two snap-fit ​​spring pieces 65 are fixedly installed on the outer circular wall of the central column 64. A rotating hole 62 is opened on one side of the flip-top platform 2. Several snap-fit ​​grooves 63 are opened on the inner circular wall of the rotating hole 62. The central column 64 is movably connected to the rotating hole 62, and the snap-fit ​​spring pieces 65 are movably snap-fitted to the snap-fit ​​grooves 63. After the structured light camera 4 completes the scanning operation, when the staff needs to perform subsequent operations such as laser welding, inspection or assembly directly on the positioning platform 8, they can manually operate the flip-top. By applying rotational force, the central column 64 of the flip-top 2 rotates within the fixed rotation hole 62, thereby opening the flip-top. During the rotation, the snap-fit ​​spring 65 installed on the flip-top 2 will engage and disengage sequentially with multiple snap-fit ​​grooves 63 distributed in a ring on the base, producing a clear sense of positioning. When the flip-top rotates to the fully open position completely away from the top surface of the positioning platform 8, the snap-fit ​​spring 65 will snap into the corresponding snap-fit ​​groove 63, firmly locking the flip-top in this state, thus leaving a full-width working surface without interference for the welding head or operating tools, ensuring the safety and convenience of subsequent processes.

[0037] Based on the above embodiments, refer to Figures 1-15 The present invention also provides a high-precision positioning method for hydrogen energy bipolar plate manufacturing equipment, the specific steps of which are as follows: S1: Workpiece placement and reference establishment. The operator places the first reference monopolar plate on the positioning platform 8, starts the equipment, and the clamping component moves automatically to center and flexibly clamp the plate. Then, the vacuum adsorption component starts to firmly adsorb and fix the reference plate on the platform, establishing an immovable absolute coordinate reference. The clamping component then releases and resets. S2: Full-domain three-dimensional data acquisition drives the directional displacement component, enabling the positioning platform 8 to carry the reference plate along a preset rectangular trajectory. At the same time, the structured light camera 4 continuously scans the moving plate to obtain complete three-dimensional point cloud data of all punches, flow channels and boundaries on its surface, and uploads it to the control system. S3: Placement and initial positioning of the board to be welded. Place the second single plate to be welded on the fixed reference plate. The clamping assembly moves again, clamping the upper and lower plates tightly. The integrated pressure detection assembly starts working, monitoring and comparing the clamping force at the four corners of the two plates in real time. If the pressure distribution difference exceeds the set threshold, the system alarms and indicates that the plates are mismatched. S4: Intelligent visual matching and deviation calculation. The structured light camera 4 performs a secondary scan on the two stacked monopolar plates. The control system performs intelligent three-dimensional feature matching and comparison between the point cloud data of this scan and the reference plate data in step S2, and quickly calculates the six-degree-of-freedom pose deviation between the second plate and the target position in the current state, including X, Y, Z translation and rotation around the three axes. S5: High-precision closed-loop fine-tuning. Based on the pose deviation calculated by S4, the system commands the fine-tuning component to move. By precisely controlling the direction and speed of the first servo motor 32 and the second servo motor 33, the carrier platform is driven to perform micron-level translation in the horizontal X and vertical Y directions. If necessary, the directional displacement component can be combined to perform angle rotation compensation until the second plate and the reference plate are completely aligned in three-dimensional space. S6: Alignment confirmation and result output. After fine-tuning, the structured light camera 4 can perform a final verification scan. When the system confirms that the key features of the two monopolar plates have reached the set accuracy standard, the PLC controller lights up the green indicator light 60 and locks the current platform position to prepare for welding. If the standard is not met, the red indicator light 60 will light up to indicate that it needs to be checked or reoperated.

[0038] Working principle: Please refer to Figures 1-15 As shown, when the staff positions the hydrogen bipolar plate for production using the structured light camera 4, the hydrogen bipolar plate can first be placed on the top surface of the positioning platform 8. Then, the structured light camera 4 can scan the hydrogen bipolar plate to directly obtain point cloud data of key features such as the three-dimensional morphology, flatness, and welding groove size of the hydrogen bipolar plate flow channel. Then, with the help of the directional displacement component and the fine-tuning component, the subsequent positioning work can be completed.

[0039] The movable stage 7, driven by the drive motor 15, rotates its drive shaft, causing the first rotating column 13 and the first gear 14 to rotate. The first gear 14 then transmits the rotational power to the closed chain 16. Since the closed chain 16 is a closed rectangle, its rotation drives the other three first gears 14 to rotate, thus allowing the closed chain 16 to move along a rectangular trajectory between the two fixed columns 10. As the closed chain 16 rotates, it moves the moving point 19. This longitudinal movement of the moving point 19 pushes the adjusting stage 17 to slide on the sliding column 11, and also causes the connecting stage 20, the movable stage 7, and the positioning platform 8 to move longitudinally. When the closed chain 16 drives the moving point 19 to move laterally, the adjusting platform 17 stops moving. The moving point 19 will slide inside the sliding hole 18 under the drive of the closed chain 16. At this time, the moving point 19 will drive the connecting platform 20, the moving platform 7 and the positioning platform 8 to move laterally. According to this movement, the moving point 19 will drive the connecting platform 20, the moving platform 7 and the positioning platform 8 to move in a rectangular trajectory. Since the perforations on the hydrogen bipolar plate are uniformly arranged, the structured light camera 4 is then used to scan the entire flow channel surface of the upper and lower monopolar plates to obtain three-dimensional point cloud data containing all flow channels, holes and boundaries. Thus, by following the rectangular path of the positioning platform 8, each perforation on the monopolar plate can be scanned individually, which is convenient for mutual positioning of the two monopolar plates by means of the perforations or special points on the two monopolar plates.

[0040] With the rack 27 in place, the first servo motor 32 and the second servo motor 33 are positioned opposite each other. When the drive shaft of the first servo motor 32 drives the first worm 22 to rotate clockwise, the drive shaft of the second servo motor 33 drives the second worm 23 to rotate clockwise. Since the worm wheel 24 is between the first worm 22 and the second worm 23, the clockwise rotation of the first worm 22 and the second worm 23 will engage and drive the worm wheel 24 to rotate clockwise. In turn, the worm wheel 24 will drive the second gear 25 to rotate through the connecting column 34. Conversely, when the drive shafts of the first servo motor 32 and the second servo motor 33 drive the first worm 22 and the second worm 23 to rotate counterclockwise, the first worm 22 and the second worm 23 will drive the worm wheel 24 to rotate counterclockwise. The worm wheel 24 will then drive the second gear 25 to rotate counterclockwise via the connecting column 34. Through the rotation of the second gear 25, the second gear 25 will mesh with the rack 27, causing the rack 27 to drive the support rod 28 and the connecting plate 29 to move laterally. Through the forward and reverse rotation of the second gear 25, the rack... 27. When the support rod 28 and the connecting plate 29 move left and right, and the first servo motor 32 and the second servo motor 33 drive the first worm 22 and the second worm 23 to move forward and backward simultaneously, the teeth of the first worm 22 and the second worm 23 will rotate in the same direction. Because the worm wheel 24 will be stuck by the teeth of the first worm 22 and the second worm 23 and will not rotate, the simultaneous interlacing of the teeth of the first worm 22 and the second worm 23 with the worm wheel 24 allows the worm wheel 24 to move linearly along the outer wall of the first worm 22 and the second worm 23. Then, the worm gear 24 will drive the second gear 25, sliding frame 26, support rod 28, connecting plate 29, mounting rod 9, connecting platform 20, moving platform 7 and positioning platform 8 to move longitudinally, thereby facilitating the fine-tuning of the position of the hydrogen energy bipolar plate, so that the initial center position of the hydrogen energy bipolar plate is aligned with the structured light camera 4. At the same time, it can also align the first punch or special point of the hydrogen energy bipolar plate with the structured light camera 4. Then, the directional displacement component is used to run the hydrogen energy bipolar plate in a rectangular trajectory, so that the punch and special point of the two single plates are aligned with each other.

[0041] With the shrinking disc 39 in place, once the hydrogen bipolar plate is placed on the top surface of the positioning platform 8, the stepper motor 52 drives the shrinking disc 39 to rotate. The rotation of the shrinking disc 39 moves the rotating column 41, which in turn moves the pull rod 40 and the pulling column 42. Simultaneously, the pulling column 42 rotates around the force groove 44 and pulls the slider 36 towards the shrinking disc 39. At this time, multiple sliders 36 and clamping blocks 37 move towards the shrinking disc 39 simultaneously, while the hydrogen bipolar plate is positioned between the clamping blocks 37. The clamping blocks 37 then contact the sides of the hydrogen bipolar plate, facilitating clamping.

[0042] By using the pressure sensor 49, when the four corners of the monopolar plate enter the interior of the four clamping blocks 37 respectively, the four corners of the monopolar plate will squeeze the pressure sensor 49 and compress the detection plate 47 and the compression spring 46. At this time, the pressure sensor 49 will detect the clamping pressure of the four corners of the hydrogen energy bipolar plate. Subsequently, by placing the second monopolar plate on the top surface of the first monopolar plate, and the four corners of the second monopolar plate will squeeze the pressure sensor 49 on the upper layer, the clamping pressure of the two monopolar plates can be detected separately. When the pressure of the two monopolar plates is different, it indicates that the size or shape of the two monopolar plates is not compatible, and positioning welding cannot be completed.

[0043] Through the adsorption hole 59, the operator can place the first monopolar plate as a standard reference plate on the top surface of the positioning platform 8. After the position of the first reference plate is adjusted, the micro vacuum pump 54 is used to evacuate the inside of the air tank 58 through the air extraction pipe 55, the diversion pipe 56 and the connecting pipe 57, and conduct the air to the top surface of the positioning platform 8 through the adsorption hole 59, so as to facilitate the adsorption and locking of the first reference monopolar plate. Then the clamping block 37 can be moved and adjusted at will.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment, characterized in that, include: Testing station (1), the top surface of which is provided with a flip-top platform (2); A scanning component is disposed on the inner top surface of the flip-top platform (2) for scanning and positioning the hydrogen bipolar plate. The scanning component includes: a detection slot (3), which is opened on the inner top surface of the flip-top platform (2). A structured light camera (4) is fixedly installed inside the detection slot (3). A mounting plate (5) is fixedly installed on the top surface of the detection platform (1). Two protective frames (6) are fixedly installed on the top surface of the mounting plate (5). A moving stage (7) is provided on the top surface of the two protective frames (6). A positioning platform (8) is fixedly installed on the top surface of the moving stage (7). The top surface of the mounting plate (5) is provided with a directional displacement component for adjusting the position of the hydrogen energy bipolar plate; The top surface of the detection station (1) is provided with a fine-tuning component for precisely adjusting the position of the hydrogen energy bipolar plate; The bottom surface of the positioning platform (8) is provided with a clamping component for stabilizing the hydrogen energy bipolar plate.

2. The high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that: The directional displacement component includes: Two mounting rods (9) are spaced apart. Two fixing posts (10) are fixedly mounted on the top surface of the two mounting rods (9). Two fixing posts (10) are spaced apart. Two sliding posts (11) are fixedly mounted between the two fixing posts (10). Two fixing plates (12) are fixedly mounted on the bottom surface of the two fixing posts (10). Two circular through holes are opened on the top surface of the fixing plates (12). A rotating post (13) is movably sleeved on the inner wall of the circular through holes. A first gear (14) is fixedly mounted on the top surface of the rotating post (13). A drive motor (15) is fixedly mounted on the bottom surface of the fixing plates (12). The drive shaft of the drive motor (15) is fixedly installed with the rotating column (13). A closed chain (16) is externally meshed with several first gears (14). An adjustment platform (17) is provided between the two fixed columns (10). The adjustment platform (17) is movably sleeved with the sliding column (11). A sliding hole (18) is opened on the top surface of the adjustment platform (17). A moving point (19) is slidably connected inside the sliding hole (18). The moving point (19) is fixedly installed with the closed chain (16). A connecting platform (20) is fixedly installed on the top surface of the moving point (19). The connecting platform (20) is fixedly installed with the moving platform (7).

3. The high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that, The fine-tuning component includes: A support frame (21) is fixedly installed on the top surface of the testing table (1). A first worm (22) and a second worm (23) are provided between the testing table (1) and the support frame (21). A first servo motor (32) is fixedly installed on one side of the support frame (21). The drive shaft of the first servo motor (32) passes through the support frame (21) and is fixedly installed with the first worm (22). A second servo motor (33) is fixedly installed on one side inside the testing table (1). The drive shaft of the second servo motor (33) is fixedly installed with the second worm (23). A worm wheel (24) meshes between the first worm (22) and the second worm (23). A connecting column (34) is fixedly installed on the top surface of the worm wheel (24). A second gear (25) is fixedly installed on the top surface of the connecting column (34), and a sliding frame (26) is provided on the top surface of the worm gear (24). The sliding frame (26) is movably sleeved with the connecting column (34). A rack (27) is slidably connected inside the sliding frame (26). The rack (27) is meshed with the second gear (25). A support rod (28) is movably sleeved inside the sliding frame (26). Connecting plates (29) are fixedly installed at both ends of the rack (27) and the support rod (28). A guide hole (30) is opened on one side of the sliding frame (26). Two guide rods (31) are fixedly installed between the inner side of the detection table (1) and the support frame (21). The guide rods (31) are slidably connected with the guide hole (30).

4. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that, The clamping assembly includes: A plurality of limiting holes (35) are provided on the bottom surface of the positioning platform (8). A slider (36) is slidably connected inside the limiting holes (35). A clamping block (37) is fixedly installed on the top surface of the slider (36). A reserved groove (38) is provided on the bottom surface of the positioning platform (8). A shrinking disc (39) is provided inside the reserved groove (38). A plurality of pull rods (40) are provided on the bottom surface of the shrinking disc (39). A rotating column (41) and a pulling column (42) are fixedly installed on the top surface of the pull rods (40). A plurality of... A rotating hole (43) is provided, and a force groove (44) is provided on the bottom surface of the slider (36). The pulling column (42) is movably connected to the force groove (44), and the rotating column (41) is movably connected to the rotating hole (43). A stepper motor (52) is fixedly installed inside the moving platform (7). The drive shaft of the stepper motor (52) is fixedly installed to the shrinking plate (39). Moving blocks (50) are fixedly installed on both sides of the slider (36). Sliding grooves (51) are provided on both sides of the limiting hole (35). The moving blocks (50) are slidably connected to the sliding grooves (51).

5. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 4, characterized in that: The clamping block (37) is internally provided with a pressure detection component for detecting the clamping force of the clamped hydrogen bipolar plate, the pressure detection component comprising: Several mounting slots (45) are respectively opened inside several clamping blocks (37). Each clamping block (37) has two layers of mounting slots (45) inside. The mounting slots (45) are L-shaped. Several compression springs (46) are fixedly installed on both sides of the inside of the mounting slots (45). Two detection plates (47) are movably sleeved inside the mounting slots (45). The detection plates (47) are fixedly installed with the compression springs (46). The two detection plates (47) are arranged in an L-shape. A limiting slot (48) is opened on one side of the detection plate (47). A pressure sensor (49) is fixedly installed inside the limiting slot (48).

6. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that: A fixed groove (53) is provided on one side of the moving platform (7). A micro vacuum pump (54) is fixedly installed inside the fixed groove (53). An air extraction pipe (55) is fixedly sleeved on the outside of the air extraction port of the micro vacuum pump (54). A diversion pipe (56) is fixedly installed on the top surface of the moving platform (7). The diversion pipe (56) is fixedly installed with the air extraction pipe (55). The air extraction pipe (55) extends into the interior of the diversion pipe (56). Two connecting pipes (57) are fixedly installed on the outer circular wall of the diversion pipe (56). The connecting pipes (57) extend into the interior of the diversion pipe (56). Two air grooves (58) are provided on one side of the positioning platform (8). The air grooves (58) are fixedly sleeved with the connecting pipes (57). Several adsorption holes (59) are provided on the top surface of the positioning platform (8). The adsorption holes (59) are connected to the air grooves (58).

7. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that: A PLC controller is fixedly installed on one side of the testing platform (1), and two indicator lights (60) are fixedly installed on one side of the testing platform (1). The PLC controller is electrically connected to the indicator lights (60) and the PLC controller is electrically connected to the structured light camera (4).

8. A high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment according to claim 1, characterized in that: Support plates (61) are fixedly installed on both sides of the testing platform (1). A central column (64) is fixedly installed between the two support plates (61). Two snap-fit ​​spring pieces (65) are fixedly installed on the outer circular wall of the central column (64). A rotating hole (62) is opened on one side of the flip-top platform (2). Several snap-fit ​​grooves (63) are opened on the inner circular wall of the rotating hole (62). The central column (64) is movably connected to the rotating hole (62), and the snap-fit ​​spring pieces (65) are movably snapped into the snap-fit ​​grooves (63).

9. A high-precision positioning method for hydrogen energy bipolar plate manufacturing equipment, employing a high-precision positioning device for hydrogen energy bipolar plate manufacturing equipment as described in any one of claims 1-8, characterized in that... Includes the following steps: S1: Workpiece placement and reference establishment. The operator places the first single plate as the reference on the positioning platform (8), starts the equipment, and the clamping component automatically moves to center and flexibly clamp the plate. Then, the vacuum adsorption component starts to firmly adsorb and fix the reference plate on the platform, establishing an immovable absolute coordinate reference. The clamping component then releases and resets. S2: Full-domain three-dimensional data acquisition drives the directional displacement component, so that the positioning platform (8) carries the reference plate along the preset rectangular trajectory. At the same time, the structured light camera (4) continuously scans the moving plate to obtain complete three-dimensional point cloud data of all punches, channels and boundaries on its surface, and uploads it to the control system. S3: Placement and initial positioning of the board to be welded. Place the second single plate to be welded on the fixed reference plate. The clamping assembly moves again, clamping the upper and lower plates tightly. The integrated pressure detection assembly starts working, monitoring and comparing the clamping force at the four corners of the two plates in real time. If the pressure distribution difference exceeds the set threshold, the system alarms and indicates that the plates are mismatched. S4: Intelligent visual matching and deviation calculation. The structured light camera (4) performs a second scan on the two stacked monopole plates. The control system performs intelligent three-dimensional feature matching and comparison between the point cloud data of this scan and the reference plate data (S2 step) to quickly calculate the six-degree-of-freedom pose deviation (including X, Y, Z translation and rotation around the three axes) between the second plate in the current state and the target position. S5: High-precision closed-loop fine adjustment. Based on the position deviation calculated by S4, the system commands the fine adjustment component to move. By precisely controlling the direction and speed of the first servo motor (32) and the second servo motor (33), the bearing platform is driven to perform micron-level translation in the horizontal (X) and vertical (Y) directions. If necessary, the directional displacement component can be combined to perform angle rotation compensation until the second plate and the reference plate are completely aligned in three-dimensional space. S6: Alignment confirmation and result output. After fine-tuning, the structured light camera (4) can perform a final verification scan. When the system confirms that the key features of the two monopole plates have reached the set accuracy standard, the PLC controller lights up the green indicator light (60) and locks the current platform position to prepare for welding. If the standard is not met, the red indicator light (60) will light up to indicate that it needs to be checked or reoperated.

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