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CN-121972886-A - High-precision positioning device and positioning method for hydrogen energy bipolar plate manufacturing equipment

CN121972886ACN 121972886 ACN121972886 ACN 121972886ACN-121972886-A

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, wherein 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 coded grating is emitted through a structured light camera, an image is acquired, 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 three-dimensional morphology, flatness and welding groove size of a runner are directly acquired, an absolute digital reference is provided for intelligent positioning, a driving positioning platform can carry a workpiece to execute precise rectangular track movement through a driving motor, a closed chain and a moving point, the visual field of the structured light camera can traverse each punching hole and the runner on the surface of the bipolar plate, and global three-dimensional data acquisition is realized.

Inventors

  • TIAN FENGYI
  • GUO WEN
  • BAI CHENGZHENG
  • LI XIAOYU
  • ZHANG XIONG
  • WU WENGE
  • SUN HAIGUI
  • LI XIANGQIAN

Assignees

  • 纳光电(太原)研究院有限公司

Dates

Publication Date
20260505
Application Date
20260127

Claims (9)

  1. 1. A high precision positioning device for a hydrogen energy bipolar plate manufacturing apparatus, comprising: the device comprises a detection table (1), wherein a flip table (2) is arranged on the top surface of the detection table (1); The scanning assembly is arranged on the inner top surface of the flip table (2) and used for scanning and positioning the hydrogen energy bipolar plate, and comprises a detection groove (3), wherein the detection groove (3) is formed in the inner top surface of the flip table (2), a structured light camera (4) is fixedly arranged in the detection groove (3), a mounting plate (5) is fixedly arranged on the top surface of the detection table (1), two protection frames (6) are fixedly arranged on the top surface of the mounting plate (5), a movable table (7) is arranged on the top surface of the two protection frames (6), and a positioning platform (8) is fixedly arranged on the top surface of the movable table (7); the top surface of the mounting plate (5) is provided with a directional displacement assembly for adjusting the position of the hydrogen bipolar plate; The top surface of the detection table (1) is provided with a fine adjustment component for accurately adjusting the position of the hydrogen energy bipolar plate; The bottom surface of location platform (8) is provided with the centre gripping subassembly that is used for stabilizing hydrogen energy bipolar plate.
  2. 2. The high-precision positioning apparatus for a hydrogen bipolar plate manufacturing apparatus according to claim 1, wherein said directional displacement assembly comprises: The two mounting rods (9), two the top surfaces of the mounting rods (9) are fixedly provided with two fixing columns (10), two the fixing columns (10) are arranged at intervals, two sliding columns (11) are fixedly arranged between the fixing columns (10), two fixing plates (12) are fixedly arranged on the bottom surfaces of the fixing columns (10), two circular through holes are formed in the top surfaces of the fixing plates (12), a rotating column (13) is movably sleeved on the inner circular wall surface of each circular through hole, a first gear (14) is fixedly arranged on the top surface of each rotating column (13), a driving motor (15) is fixedly arranged on the bottom surface of each fixing plate (12), a driving shaft of each driving motor (15) is fixedly arranged with each rotating column (13), a plurality of first gears (14) are externally meshed and connected with a closed chain (16), an adjusting table (17) is arranged between the two fixing columns (10), the adjusting table (17) is movably sleeved with each sliding table (11), a sliding table (19) is fixedly connected with each sliding table (19), a sliding table (19) is fixedly provided with a sliding table (19), the connection station (20) is fixedly mounted with the mobile station (7).
  3. 3. The high precision positioning apparatus for a hydrogen energy bipolar plate manufacturing apparatus of claim 1, wherein said fine tuning assembly comprises: The support frame (21), support frame (21) fixed mounting is in the top surface of detecting bench (1), detect bench (1) with be provided with first worm (22) and second worm (23) between support frame (21), one side fixed mounting of support frame (21) has first servo motor (32), the drive shaft of first servo motor (32) passes support frame (21) with first worm (22) fixed mounting, the inside one side fixed mounting of detecting bench (1) has second servo motor (33), the drive shaft of second servo motor (33) with second worm (23) fixed mounting, first worm (22) with meshing between second worm (23) is connected with worm wheel (24), the top surface fixed mounting of worm wheel (24) has spliced pole (34), the top surface fixed mounting of spliced pole (34) has second gear (25), the top surface of worm wheel (24) is provided with carriage (26), carriage (26) with spliced pole (34) inside one side fixed mounting of worm wheel (26) with second worm (23) fixed mounting, carriage (27) are connected with inside carriage (27) in the movable connection (27), the rack (27) and the two ends of the supporting rod (28) are respectively fixedly provided with a connecting plate (29), one side of the sliding frame (26) is provided with a guide hole (30), two guide rods (31) are fixedly arranged between one side of the inside of the detection table (1) and the supporting frame (21), and the guide rods (31) are in sliding connection with the guide holes (30).
  4. 4. The high precision positioning assembly for a hydrogen energy bipolar plate manufacturing apparatus of claim 1, wherein said clamping assembly comprises: The utility model provides a plurality of spacing hole (35), a plurality of spacing hole (35) are all offered the bottom surface of locating platform (8), the inside sliding connection of spacing hole (35) has slider (36), the top surface fixed mounting of slider (36) has grip block (37), reserve groove (38) have been seted up to the bottom surface of locating platform (8), the inside of reserve groove (38) is provided with shrink dish (39), the bottom surface of shrink dish (39) is provided with a plurality of pull rod (40), the top surface fixed mounting of pull rod (40) has column spinner (41) and pulling post (42), the bottom surface of shrink dish (39) has seted up a plurality of rotation hole (43), the bottom surface of slider (36) has seted up atress groove (44), pulling post (42) with atress groove (44) activity cup joint, column spinner (41) with rotation hole (43) activity cup joints, the inside fixed mounting of moving platform (7) has step motor (52), the drive shaft of step motor (52) with shrink dish (39) fixed mounting has step motor (35) both sides fixed mounting, both sides (50) are opened respectively to slider (36), the moving block (50) is slidably connected with the sliding groove (51).
  5. 5. The high-precision positioning apparatus for a hydrogen bipolar plate manufacturing apparatus according to claim 4, wherein said clamping block (37) is internally provided with a pressure detection assembly for detecting clamping force of a clamped hydrogen bipolar plate, said pressure detection assembly comprising: The utility model provides a plurality of mounting groove (45), a plurality of mounting groove (45) are offered respectively in the inside of a plurality of grip block (37), every is single the inside of grip block (37) has all been offered upper and lower two-layer mounting groove (45), mounting groove (45) are L type groove, the inside both sides of mounting groove (45) are fixed mounting respectively has a plurality of compression spring (46), two pick-up plates (47) have been cup jointed in the inside activity of mounting groove (45), pick-up plate (47) with compression spring (46) fixed mounting, two pick-up plates (47) are L type and arrange, limit groove (48) have been seted up to one side of pick-up plate (47), the inside fixed mounting of limit groove (48) has pressure sensor (49).
  6. 6. The high-precision positioning device for the hydrogen bipolar plate manufacturing equipment according to claim 1, wherein a fixing groove (53) is formed in one side of the mobile station (7), a micro vacuum pump (54) is fixedly installed in the fixing groove (53), an exhaust pipe (55) is fixedly sleeved outside an exhaust opening of the micro vacuum pump (54), a shunt pipe (56) is fixedly installed on the top surface of the mobile station (7), the shunt pipe (56) is fixedly installed with the exhaust pipe (55), the exhaust pipe (55) extends to the inside of the shunt pipe (56), two connecting pipes (57) are fixedly installed on the outer circular wall surface of the shunt pipe (56), two air grooves (58) are formed in one side of the positioning platform (8), the air grooves (58) are fixedly sleeved with the connecting pipes (57), a plurality of adsorption holes (59) are formed in the top surface of the positioning platform (8), and the adsorption holes (59) are communicated with the air grooves (58).
  7. 7. The high-precision positioning device for the hydrogen energy bipolar plate manufacturing equipment according to claim 1, wherein a PLC (programmable logic controller) is fixedly arranged on one side of the detection table (1), two indicator lamps (60) are fixedly arranged on one side of the detection table (1), the PLC is electrically connected with the indicator lamps (60), and the PLC is electrically connected with the structured light camera (4).
  8. 8. The high-precision positioning device for the hydrogen energy bipolar plate manufacturing equipment according to claim 1, wherein the two sides of the detection table (1) are fixedly provided with support plates (61) respectively, a central column (64) is fixedly arranged between the two support plates (61), two clamping elastic pieces (65) are fixedly arranged on the outer circular wall surface of the central column (64), a rotating hole (62) is formed in one side of the flip table (2), a plurality of clamping grooves (63) are formed in the inner circular wall surface of the rotating hole (62), the central column (64) is movably sleeved with the rotating hole (62), and the clamping elastic pieces (65) are movably clamped with the clamping grooves (63).
  9. 9. A high-precision positioning method for a hydrogen bipolar plate manufacturing apparatus employing a high-precision positioning device for a hydrogen bipolar plate manufacturing apparatus according to any one of claims 1 to 8, comprising the steps of: S1, workpiece placement and reference establishment, wherein an operator places a first monopole plate serving as a reference on a positioning platform (8), equipment is started, a clamping assembly automatically acts to center and flexibly clamp the workpiece, then a vacuum adsorption assembly is started to firmly adsorb and fix the reference plate on the platform, an immovable absolute coordinate reference is established, and then the clamping assembly is released and reset; S2, collecting global three-dimensional data, driving the directional displacement assembly to enable the positioning platform (8) to move along a preset rectangular track with the reference plate, and simultaneously, continuously scanning the moving plate by the structured light camera (4) to obtain complete three-dimensional point cloud data of all punching holes, flow channels and boundaries on the surface of the plate, and uploading the complete three-dimensional point cloud data to the control system; S3, placing and initially positioning a to-be-welded plate, placing a second to-be-welded monopolar plate on the fixed reference plate, enabling the clamping assembly to act again, simultaneously holding the upper plate and the lower plate tightly, enabling the integrated pressure detection assembly to start working, monitoring and comparing clamping forces at four corners of the two plates in real time, and if the pressure distribution difference exceeds a set threshold value, giving an alarm by a system to prompt that the plates are not matched; S4, intelligent visual matching and deviation calculation, wherein the structured light camera (4) performs secondary scanning on two stacked monopole plates, the control system performs intelligent three-dimensional feature matching and comparison on the scanned point cloud data and reference plate data (S2), and the six-degree-of-freedom pose deviation (comprising X, Y, Z translation and rotation around three axes) between the second plate and the target position in the current state is rapidly calculated; S5, high-precision closed loop fine tuning, wherein according to the pose deviation calculated in the step S4, a control system instructs a fine tuning assembly to act, and the steering and rotating speeds of a first servo motor (32) and a second servo motor (33) are precisely controlled to drive a bearing platform to carry out micron-sized translation in the transverse direction (X) and the longitudinal direction (Y), and if necessary, an orientation displacement assembly can be combined to carry out angle rotation compensation until the second plate and the reference plate are completely aligned in a three-dimensional space; S6, after the alignment confirmation and result output are completed, the structured light camera (4) can carry out final recheck scanning, when the system confirms that the coincidence degree of key features of the two monopole plates reaches a set precision standard, the PLC controller lights up a green indicator lamp (60) and locks the current platform position to prepare for welding, and if the current platform position does not reach the standard, the PLC controller lights up a red indicator lamp (60) to prompt that the inspection or the re-operation is needed.

Description

High-precision positioning device and positioning method for hydrogen energy bipolar plate manufacturing equipment Technical Field The invention relates to the technical field of hydrogen energy bipolar plate manufacturing, in particular to a high-precision positioning device and a positioning method for hydrogen energy bipolar plate manufacturing equipment. Background The hydrogen energy bipolar plate is a core component of a hydrogen fuel cell and is mainly used for supporting a membrane electrode, separating reaction gas, conducting electricity and transmitting fluid, the bipolar plate plays multiple key roles in a galvanic pile, namely, hydrogen and air (oxygen) are separated, the gas is uniformly transmitted to a membrane electrode area where reaction occurs through a runner with a precisely-machined surface, current generated by electrochemical reaction is collected, electricity conduction is established between single batteries connected in series, water generated by the reaction is discharged, generated heat is emitted, stable working of the galvanic pile is maintained, and two stamped unipolar plates are required to be welded back to form a complete bipolar plate. The prior art relies on preset physical locating pins or contour stoppers for rough fixing, the contact type and local locating mode cannot adapt to microscopic warping, elastic deformation and dimensional tolerance among batches generated by stamping and transportation of the bipolar plates, macroscopic deformation of the plates possibly exists due to local hard contact constraint, assembly stress is introduced, a virtual position deviation which is difficult to measure exists between a real joint surface and an ideal state, hidden dangers are buried for subsequent welding quality, the locating process depends on experience and naked eyes of operators, general alignment is carried out through simple optical projection or two-dimensional images, comprehensive data of three-dimensional morphology of the plates cannot be obtained by the method, quantitative evaluation of key features such as flatness, runner depth and the like cannot be carried out, the whole locating process is open-loop, a real-time data feedback and automatic deviation compensation mechanism is lacked, product consistency is poor, and yield fluctuation is large. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a high-precision positioning device and a positioning method for hydrogen energy bipolar plate manufacturing equipment, so as to solve the problems in the background art. The technical aim of the invention is realized by the following technical scheme: the high-precision positioning device and the positioning method for the hydrogen bipolar plate manufacturing equipment comprise a detection table, wherein a flip table is arranged on the top surface of the detection table, a scanning assembly is arranged on the inner top surface of the flip table and used for scanning and positioning the hydrogen bipolar plate, the scanning assembly comprises a detection groove, the detection groove is formed in the inner top surface of the flip table, a structured light camera is fixedly arranged in the detection groove, a mounting plate is fixedly arranged on the top surface of the detection table, two protection frames are fixedly arranged on the top surface of the mounting plate, a movable table is arranged on the top surface of the two protection frames, a positioning platform is fixedly arranged on the top surface of the movable table, a directional displacement assembly used for adjusting the position of the hydrogen bipolar plate is arranged on the top surface of the mounting plate, a fine adjustment assembly used for accurately adjusting the position of the hydrogen bipolar plate is arranged on the top surface of the detection table, and a clamping assembly used for stabilizing the hydrogen bipolar plate is arranged on the bottom surface of the positioning platform. Through adopting above-mentioned technical scheme, through the structured light camera that sets up, when the staff carries out production location to hydrogen energy bipolar plate, can at first place hydrogen energy bipolar plate at the top surface of location platform, and then scan hydrogen energy bipolar plate through using structured light camera to can directly acquire the three-dimensional appearance of hydrogen energy bipolar plate runner, flatness, welding key characteristic's such as groove size point cloud data, then cooperation directional displacement subassembly and fine setting subassembly, thereby accomplish follow-up positioning work. Preferably, the directional displacement assembly comprises two mounting rods, the two mounting rods are arranged at intervals, two fixing columns are fixedly arranged on the top surfaces of the mounting rods, two fixing columns are arranged at intervals, two sliding columns are fixedly arranged between the two fixing columns,