Automatic laser precision welding bipolar plate processing device

Abstract

The utility model relates to an automatic laser precise welding bipolar plate machining device which comprises a feeding and discharging mechanism, an upper camera, a lower camera, a carrying mechanical arm, a linear scanning unit, a laser unit and a coaxial vision galvanometer welding system mechanism. The bipolar plate is moved to the linear scanning unit, the coaxial vision galvanometer welding system mechanism and the laser unit through the carrying mechanical arm, and detection linear scanning, correction and welding operation are sequentially and correspondingly carried out. According to the scheme, the manipulator is adopted for feeding and discharging, full-automatic production can be achieved, wrong welding of the bipolar plate is prevented by additionally arranging a camera for code scanning, the position difference of a welding runner is detected through line scanning so that compensation can be conducted in time, and the two laser units are each of a galvanometer and field lens module matching structure, so that the bipolar plate can be welded and positioned; therefore, the accuracy of the welding track is improved, and the welding stability and speed are improved.

Description

Technical Field

[0001] The utility model relates to an automatic laser precision welding bipolar plate processing device, belonging to the technical field of laser precision welding processing. Background Art

[0002] The bipolar plate, also known as the current collector plate, is one of the important components of the fuel cell and is also a part used to isolate the battery gas chamber. It has the following functions and properties: separating fuel and oxidant, preventing gas permeation; collecting and conducting current, with high conductivity; the designed and processed flow channels can evenly distribute gas to the reaction layer of the electrode for electrode reaction; it can discharge heat to keep the battery temperature field uniform; corrosion resistance; resistance to impact and vibration; thin thickness; light weight; at the same time, low cost, easy to machine, suitable for mass production, etc.

[0003] However, most of the existing bipolar plate encapsulations adopt the trajectory laser welding method (for example: the utility model design with the patent number CN108465934A, the device includes: a workbench, and an input unit, a display unit, a control unit and a welding component respectively arranged on the workbench, the control unit is respectively connected to the input unit, the display unit and the welding component for control connection, and this welding method can automatically calculate the moving amount relative to the non-standard trajectory moving axis, and then quickly and accurately obtain the running trajectory of the welded product, with high efficiency and simple operation.). During the working process of the trajectory laser welding device, it is usually necessary to preset the trajectory of the welding track so as to control the movement of the laser head for welding.

[0004] However, the trajectory laser welding device still has some drawbacks, for example:

[0005] 1) For bipolar plates with larger sizes, there are errors in the output trajectory of the trajectory preset, and even through system numerical conversion, the errors cannot be eliminated, and the larger the size of the bipolar plate, the larger the error value, which leads to insufficient welding precision of the bipolar plate.

[0006] 2) The weld bead gap of the bipolar plate is very small, resulting in a large weld deviation rate and poor delay control precision, and it is easy to have missed welding or burn-through. Therefore, during long-term operation, the welding time for the whole plate is long, the efficiency is low, and at the same time, the production yield rate of the bipolar plate decreases.

[0007] Therefore, we propose an automatic laser precision welding bipolar plate processing device to overcome the above problems. Content of the Utility Model

[0008] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide an automatic laser precision welding bipolar plate processing device.

[0009] The purpose of the utility model is realized through the following technical solutions:

[0010] Automated laser precision bipolar plate welding processing device. When observed from a top-down perspective, the bipolar plate welding processing device includes a line-scanning end and a non-line-scanning end arranged opposite to each other. The welding station of the line-scanning end is defined as Area A, and the welding station of the non-line-scanning end is defined as Area B. One side of the line-scanning end is defined as the loading position, and the other side of the line-scanning end is defined as the unloading position. The loading position includes a first loading and unloading mechanism and a second loading and unloading mechanism, and the unloading position includes a third loading and unloading mechanism. The first loading and unloading mechanism is arranged on the right side of the bipolar plate welding processing device. An upper camera is arranged outside the adjacent first loading and unloading mechanism, and a first handling robot is arranged inside the adjacent first loading and unloading mechanism. A NG storage bin is arranged below the first handling robot. A first fixture is arranged on the left side of the NG storage bin, and a first laser unit with a movable connection is arranged in alignment with the lower side of the first fixture. A second laser unit is also arranged on the left side of the adjacent first fixture, and a coaxial vision galvanometer welding system mechanism for controlling the welding operation is arranged below the second laser unit. The second loading and unloading mechanism and the third loading and unloading mechanism are connected to the left side of the bipolar plate welding processing device. A lower camera is sequentially arranged above the adjacent second loading and unloading mechanism, and a third handling robot is arranged on the right side of the adjacent second loading and unloading mechanism. A NG wire arranging bin is arranged above the lower camera, and a line-scanning unit is arranged on the right side of the NG wire arranging bin. A second handling robot is arranged on the right side of the third loading and unloading mechanism. A second fixture and a third fixture are sequentially arranged from bottom to top on the right side of the adjacent second handling robot.

[0011] Further, in the above-mentioned automated laser precision bipolar plate welding processing device, the following applies: There are also three groups of channels on the bipolar plate welding processing device. The third fixture is arranged in the first group of channels, the second fixture is arranged in the second group of channels, and the first fixture is arranged in the third group of channels.

[0012] Further, in the above-mentioned automated laser precision bipolar plate welding processing device, the following applies: The first loading and unloading mechanism, the second loading and unloading mechanism, and the third loading and unloading mechanism are all a material transportation platform. Two metal fixture plates, two rollers, and two limit sensors are arranged on the material transportation platform. The two metal fixture plates are arranged in parallel, and both metal fixture plates are connected to the top of the material transportation platform in a lifting manner. One of the rollers is mounted at the front end of one of the metal fixture plates, and a limit sensor is arranged below the adjacent roller. The other roller is mounted at the front end of the other metal fixture plate, and a limit sensor is also arranged below the adjacent roller.

[0013] Further, in the above-mentioned automated laser precision bipolar plate processing and welding device, where: the first fixture, the second fixture, and the third fixture are all fixture mechanisms. The fixture mechanism includes a welding fixture, a fixture positioning plate, and a fixture bottom plate. The welding fixture is arranged vertically relative to the fixture bottom plate, and a positioning space is formed between the two. An optoelectronic sensor for detecting whether there is material on the welding fixture is also provided on the welding fixture. The fixture positioning plate is arranged in the positioning space, and the bottom of the fixture positioning plate is arranged on the fixture bottom plate through several columns. Several lifting cylinders for lifting the fixture positioning plate above are arranged on the fixture bottom plate.

[0014] Further, in the above-mentioned automated laser precision bipolar plate processing and welding device, where: the welding fixture successively includes a welding fixture body and a gas path cover plate from top to bottom. Several first positioning holes are evenly distributed on the welding fixture body, and a first positioning pin is fixedly arranged in each first positioning hole. The gas path cover plate is arranged in alignment with the fixture positioning plate below. When the lifting cylinder lifts the fixture positioning plate, the gas path cover plate is in contact with the fixture positioning plate.

[0015] Further, in the above-mentioned automated laser precision bipolar plate processing and welding device, where: the first handling robot, the second handling robot, and the third handling robot are all robot mechanisms. A negative pressure gauge for determining whether the pressure is normal during material suction is provided on the robot mechanism. Several suction nozzles are also evenly distributed on the robot mechanism.

[0016] Further, in the above-mentioned automated laser precision bipolar plate processing and welding device, where: the line scan unit is a line scan camera. Second positioning pins and third positioning pins are arranged in alignment at the top of the line scan camera. A second telescopic cylinder is provided at the front of the line scan camera, a fourth telescopic cylinder is provided at the rear of the line scan camera, a third telescopic cylinder is provided on the left of the line scan camera, and a first telescopic cylinder is provided on the right of the line scan camera. A wire harness terminal block is also provided on the line scan camera.

[0017] Further, in the above-mentioned automated laser precision bipolar plate processing and welding device, where: the coaxial vision galvanometer welding system mechanism includes a QBH fiber optic plug, a collimator, a coaxial beam splitting vision module, a beam splitter, a water-cooled field lens, a double-layer air knife, and a water-cooled galvanometer. The QBH fiber optic plug is arranged at the top end of the collimator. The coaxial beam splitting vision module is arranged at one end of the collimator. The double-layer air knife is arranged at the other end of the collimator. The beam splitter is arranged at the bottom end of the collimator. The water-cooled field lens and the water-cooled galvanometer are respectively connected to both sides of the extended end of the coaxial beam splitting vision module.

[0018] Furthermore, in the above-mentioned automated laser precision bipolar plate processing device, the first laser unit and the second laser unit use fiber lasers, and the fiber laser is a 500W continuous fiber laser with a fiber core diameter of 14um.

[0019] The utility model has remarkable advantages and beneficial effects compared with the prior art, which are specifically reflected in the following aspects:

[0020] ① The utility model adds camera code scanning to prevent the wrong welding caused by the incorrect placement of the anode or cathode by personnel flowing into the welding area, and the device has a code reading function, which is convenient for subsequent tracing of bad information;

[0021] ② The utility model adds a line scan unit to detect the differences in the positions of each welding flow channel through line scanning, so as to compensate in time to ensure the consistency of the welding flow channel;

[0022] ③ The utility model uses a manipulator for loading and unloading, which can realize fully automated production, and the two sets of laser units are both equipped with a galvanometer and a field lens module. By using a camera to capture fixed points, the welding trajectory can be split into multiple areas. When the laser head moves to the center of a certain area, the relative position can be kept stable. Whether it is a long or short bipolar plate, welding positioning can be carried out, thereby improving the accuracy of the welding trajectory, enhancing the welding stability and welding speed, and further increasing the production yield.

[0023] Other features and advantages of the utility model will be described in the subsequent description, and some of them will become obvious from the description or can be understood by implementing the specific embodiments of the utility model. The objectives and other advantages of the utility model can be achieved and obtained through the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

[0025] Figure 1 : The three-dimensional structure schematic diagram of the whole of the present utility model;

[0026] Figure 2 : The top view structure schematic diagram of the whole of the present utility model;

[0027] Figure 3 : The structure schematic diagram of the first loading and unloading mechanism or the second loading and unloading mechanism or the third loading and unloading mechanism of the present utility model;

[0028] Figure 4 : Schematic structural diagram of the first handling manipulator, the second handling manipulator, or the third handling manipulator of the present utility model;

[0029] Figure 5 : Top view structural diagram of the first fixture, the second fixture, or the third fixture of the present utility model;

[0030] Figure 6 : Front view structural diagram of the first fixture, the second fixture, or the third fixture of the present utility model;

[0031] Figure 7 : Three-dimensional structural diagram of the line scan unit of the present utility model;

[0032] Figure 8 : Top view structural diagram of the line scan unit of the present utility model;

[0033] Figure 9 : Structural diagram of the coaxial vision galvanometer welding system mechanism of the present utility model;

[0034] Figure 10 : Structural diagram of the product workpiece of the present utility model.

[0035] The meanings of the reference numerals in the figures are shown in the following table:

[0036]

[0037] Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0039] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, orientation terms and sequence terms are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0040] As Figure 1-2 shown, an automated laser precision welding bipolar plate processing device, when observed from a top view angle, the welding bipolar plate processing device includes a line scan end and a non-line scan end that are oppositely arranged. The welding station of the line scan end is defined as area A, and the welding station of the non-line scan end is defined as area B. One side of the line scan end is defined as the loading position, and the other side of the line scan end is defined as the unloading position.

[0041] The loading position includes a first loading and unloading mechanism 1 and a second loading and unloading mechanism 15, and the unloading position includes a third loading and unloading mechanism 16. The first loading and unloading mechanism 1 is arranged on the right side of the welding bipolar plate processing device. An upper camera 2 is arranged outside the adjacent first loading and unloading mechanism 1, and a first handling robot 3 is arranged inside the adjacent first loading and unloading mechanism 1. A NG storage bin 4 is arranged below the first handling robot 3, a first fixture 5 is arranged on the left side of the NG storage bin 4, and a first laser unit 6 that is movably connected is arranged in alignment with the lower side of the first fixture 5. A second laser unit 9 is also arranged on the left side of the adjacent first fixture 5, and a coaxial vision galvanometer welding system mechanism 17 for controlling the welding operation is arranged below the second laser unit 9. The second loading and unloading mechanism 15 and the third loading and unloading mechanism 16 are connected to the left side of the welding bipolar plate processing device. A lower camera 13 is successively arranged above the adjacent second loading and unloading mechanism 15, and a third handling robot 14 is arranged on the right side of the adjacent second loading and unloading mechanism 15. A NG wire arranging bin 12 is arranged above the lower camera 13, and a line scan unit 11 is arranged on the right side of the NG wire arranging bin 12. A second handling robot 10 is arranged on the right side of the third loading and unloading mechanism 16, and a second fixture 7 and a third fixture 8 are successively arranged from bottom to top on the right side of the adjacent second handling robot 10.

[0042] Specifically, three groups of channels are also arranged on the welding bipolar plate processing device. The third fixture 8 is arranged in the first group of channels, the second fixture 7 is arranged in the second group of channels, and the first fixture 5 is arranged in the third group of channels. In addition, the first handling robot 3 grabs the cathode plate and places it on the first fixture 5 in the third channel. After the third channel is transported to the unloading position in area A, the first handling robot 3 synchronously grabs the cathode plate and places it on the second fixture 7 in the second channel. After the second channel is transported to the unloading position in area A, the first handling robot 3 grabs the cathode plate and places it on the third fixture 8 in the first channel, and the first channel is transported to the unloading position in area A. The multi-channel mode can achieve precise control of the welding time and avoid standby time during welding.

[0043] As Figure 3As shown, the first loading and unloading mechanism 1, the second loading and unloading mechanism 15 and the third loading and unloading mechanism 16 are all a material transport platform, on which are provided two metal jig plates 18, two rollers 19 and two limit sensors 20, the two metal jig plates 18 are arranged side by side, and the two metal jig plates 18 are both lifted and connected to the top of the material transport platform. One of the rollers 19 is mounted at the front end of a metal jig plate 18, and a limit sensor 20 is provided below the adjacent roller 19. Another roller 19 is mounted at the front end of another metal jig plate 18, and a limit sensor 20 is also provided below the adjacent roller 19. Among them, the limit sensor 20 lifts the bipolar plate after sensing any jig, and lifts and fixes the bipolar plate through the positioning holes on the bipolar plate. The unloading position is when the bipolar plates are lowered, and then the bipolar plates are transported from the unloading position to the automatic guided vehicle (AGV, which is an industrial vehicle that loads goods automatically or manually, automatically drives along a set route or pulls a cargo trolley to a designated location, and then loads and unloads goods automatically or manually) through rollers 19.

[0044] like Figure 4 As shown, the first handling robot 3, the second handling robot 10 and the third handling robot 14 are all a robot mechanism, and a negative pressure gauge 31 is provided on the robot mechanism, and whether the pressure during suction is normal is determined by the negative pressure gauge 31. A plurality of suction nozzles 32 are evenly distributed on the robot mechanism, and the suction nozzles 32 are used to suck and release the product, and the suction and release work is performed simultaneously around the product through each suction nozzle, so as to ensure the firm grasping of the material and the synchronization of the material release.

[0045] like Figure 5-6 As shown, the first jig 5, the second jig 7 and the third jig 8 are all jig mechanisms, and the jig mechanism includes a welding jig 54, a jig positioning plate 55 and a jig bottom plate 58. The welding jig 54 is arranged up and down relative to the jig bottom plate 58, and a positioning space is formed between the two. A photoelectric sensor 57 for detecting whether there is material on the welding jig 54 is also provided on the welding jig 54. The jig positioning plate 55 is arranged in the positioning space to facilitate the replacement of the jig positioning, and the bottom of the jig positioning plate 55 is arranged on the jig bottom plate 58 through several columns 56. The jig bottom plate 58 is provided with several lifting cylinders 53 for lifting the upper jig positioning plate 55. Four lifting cylinders 53 of the same type are used to lift or lower synchronously to ensure the consistency of the pressing of this device.

[0046] Specifically, the welding fixture 54 includes a welding fixture body and a gas path cover plate from top to bottom. A plurality of first positioning holes 51 are evenly distributed on the welding fixture body, and a first positioning pin 52 is fixedly arranged in each first positioning hole 51. In order to avoid the first positioning pin 52 causing warping and deformation of the bipolar plate when picking and placing the bipolar plate, the first positioning pin 52 is a retractable pin. When the bipolar plate is aligned during feeding, the retractable pin pops out to fix the bipolar plate to improve accuracy; when discharging, the retractable pin retracts, and any manipulator takes away the welded bipolar plate. The gas path cover plate is arranged in alignment with the fixture positioning plate 55 below. When the lifting cylinder 53 lifts the fixture positioning plate 55, the gas path cover plate is in contact with the fixture positioning plate 55, and synchronous lifting or lowering ensures the consistency of the pressing of this device.

[0047] As Figure 7-8 shown, the line scan unit 11 is a line scan camera, and a second positioning pin 111 and a third positioning pin 112 are arranged in alignment at the top of the line scan camera. A second telescopic cylinder 114 is arranged at the front of the line scan camera, a fourth telescopic cylinder 116 is arranged at the rear of the line scan camera, a third telescopic cylinder 115 is arranged at the left of the line scan camera, and a first telescopic cylinder 113 is arranged at the right of the line scan camera. A wire harness terminal block 117 is also arranged on the line scan camera. By stretching the first telescopic cylinder 113, the second telescopic cylinder 114, the third telescopic cylinder 115, and the fourth telescopic cylinder 116, the original pressing blocks fixed on the cylinders are pulled down to press the four sides of the bipolar plate, facilitating the line scan camera to collect; the image data collected by the line scan camera is compared with the template, and the flow channel offset data is sent to the welding host (i.e., the computer), and offset compensation is performed during welding. The flow channel area has multiple rows and columns and is formed by stamping a serpentine flow channel, with unevenness. Welding can be performed at the concave parts, and the welded flow channel after welding compensation ensures the center position of the concave parts.

[0048] As Figure 9 shown, the coaxial vision galvanometer welding system mechanism 17 includes a QBH fiber optic plug 171, a collimator 172, a coaxial beam splitting vision module 173, a beam splitter 174, a water-cooled field lens 175, a double-layer air knife 176, and a water-cooled galvanometer 177. The QBH fiber optic plug 171 is arranged at the top of the collimator 172. The coaxial beam splitting vision module 173 is arranged at one end of the collimator 172, and the double-layer air knife 176 is arranged at the other end of the collimator 172. The beam splitter 174 is arranged at the bottom of the collimator 172. The water-cooled field lens 175 and the water-cooled galvanometer 177 are respectively connected to both sides of the extended end of the coaxial beam splitting vision module 173. Auxiliary cooling is achieved through the double-layer air knife 176, the water-cooled field lens 175, and the water-cooled galvanometer 177.

[0049] Specifically, the first laser unit 6 and the second laser unit 9 adopt fiber lasers, which are fiber lasers with a continuous power of 500W and a fiber core diameter of 14um. When using this fiber laser for bipolar plate welding, the welding process and weld width are extremely stable, without obvious fluctuations, the welding strength is high, the weld is relatively flat, and the consistency is good; because the single-mode fiber laser has concentrated energy and an extremely small weld, the heat input energy is extremely low. When welding thin sheets, the material is not prone to thermal deformation, which affects the effect; the welding yield of the hydrogen fuel cell is greatly improved.

[0050] In specific applications, first, the cathode plate required for the product workpiece 21 is transported to the first loading and unloading mechanism 1 and the second loading and unloading mechanism 15 by an automated guided vehicle. After the third loading and unloading mechanism 16 picks up the welded finished product, the cathode plate on the first loading and unloading mechanism 1 is moved by the first handling robot 3 to the upper camera 2 for code scanning and calibration, obtaining a cathode plate with a NG (not good) code scan or a cathode plate with an OK code scan. The cathode plate determined to be NG is placed in the NG storage bin 4 by the first handling robot 3. The OK cathode plate is placed on the first fixture 5 in the third channel by the moving shaft on the first handling robot 3. The first fixture 5 moves to the loading position of the line scan end and waits for the second handling robot 10 to continue transporting and placing the material.

[0051] Then, the third handling robot 14 grabs the anode plate required for the product workpiece 21, and the thickness of the anode plate is measured by a height gauge. The anode plate exceeding the set value is transported and placed in the NG storage bin 4 by the third handling robot 14, and the anode plate not exceeding the set value is transported to the lower camera 13 for code scanning and calibration. After the lower camera 13 performs code scanning and screening, the NG anode plate is transported and placed in the NG storage bin 4 by the third handling robot 14, and the anode plate with an OK code scan is transported and placed on the line scan unit 11 by the third handling robot 14. After the line scan unit 11 scans and screens the anode plate, the NG anode plate is transported and placed in the NG storage bin 4 by the third handling robot 14, and the OK anode plate is grabbed by the second handling robot 10 and placed on the first fixture 5. The product workpiece 21 (such as Figure 10As shown, a part of the product workpiece 21 is welded by the A part welding head 211 and another part is welded by the B part welding head 212. It is a multi-station welding process where the AB galvanometer heads weld alternately, with high processing efficiency. The second positioning hole 213 is set to correspond and coincide with the position of the first positioning hole 51. After maintaining the installation stability, the first jig 5 moves and transports the qualified anode plate to area A of the third channel. The qualified anode plate is lifted by the lifting cylinder 53 to the area of the welding jig 54. Then, the second laser unit is moved above area A of the third channel to perform laser welding on the A part welding head 211 of the anode plate. After the welding in area A of the third channel is completed, it is transported from area A to area B and lifted by the second jig 7 or the third jig 8 in area B. The first laser unit is moved above area B of the third channel to perform laser welding on the B part welding head 212 of the anode plate again. After the welding in area B of the third channel is completed, it is transported from area B to area A for unloading. The welded finished product is transported by the second handling manipulator 10 and placed on the third loading and unloading mechanism 16. Thus, the operation of a set of products from loading to unloading is all completed, and repeating the above steps can complete the operation. Through the above processing steps, not only the welding strength is improved, but also the production efficiency can be greatly increased.

[0052] In addition, the second handling manipulator 10 grabs the anode plate by the line scan unit 11 and places it on the first jig 5 in the third channel; the second handling manipulator 10 grabs the anode plate by the line scan unit 11 and places it on the second jig 7 in the second channel; the second handling manipulator 10 grabs the anode plate by the line scan unit 11 and places it on the third jig 8 in the first channel. The principle followed is to grab the material first and then place it. That is, after the welding in any one of the three channels is completed, the second handling manipulator 10 preferentially grabs the welded finished product material and places it on the third loading and unloading mechanism 16, and it keeps cycling like this. The first laser unit 6 and the second laser unit 9 are always in the welding working state without standby intervals, thereby maximizing the utilization rate of the machine and improving the work efficiency.

[0053] In summary, in order to reduce manual labor and improve production efficiency, this utility model uses manipulators for handling from loading to unloading, and can also be combined with the factory line body to achieve full automation by the AGV communication main control. Both groups of laser units use galvanometer and field lens modules in cooperation with a multi-station platform, with high-speed jumping and precise control of the on / off light delay time, thereby further precisely controlling the welding duration.

[0054] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0055] The above are only specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model.

[0056] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

Claims

1. An automated laser precision welding bipolar plate processing device, characterized in that: Viewed from the top-down perspective, the welding bipolar plate processing device includes a line-scanning end and a non-line-scanning end which are arranged opposite to each other; the welding station at the line-scanning end is defined as Area A, and the welding station at the non-line-scanning end is defined as Area B; one side of the line-scanning end is defined as the loading position, and the other side of the line-scanning end is defined as the unloading position. The loading position includes a first loading and unloading mechanism (1) and a second loading and unloading mechanism (15), and the unloading position includes a third loading and unloading mechanism (16); the first loading and unloading mechanism (1) is arranged on the right side of the welding bipolar plate processing device, an upper camera (2) is arranged outside the adjacent first loading and unloading mechanism (1), and a first handling robot (3) is arranged inside the adjacent first loading and unloading mechanism (1); a NG storage bin (4) is arranged below the first handling robot (3); a first fixture (5) is arranged on the left side of the NG storage bin (4), and a first laser unit (6) which is movably connected is arranged in a position corresponding to the lower side of the first fixture (5); a second laser unit (9) is also arranged on the left side of the adjacent first fixture (5); a coaxial vision galvanometer welding system mechanism (17) for controlling the welding operation is arranged below the second laser unit (9); the second loading and unloading mechanism (15) and the third loading and unloading mechanism (16) are connected to the left side of the welding bipolar plate processing device, a lower camera (13) is sequentially arranged above the adjacent second loading and unloading mechanism (15), and a third handling robot (14) is arranged on the right side of the adjacent second loading and unloading mechanism (15); a NG wire arranging bin (12) is arranged above the lower camera (13), and a line-scanning unit (11) is arranged on the right side of the NG wire arranging bin (12); a second handling robot (10) is arranged on the right side of the third loading and unloading mechanism (16), and a second fixture (7) and a third fixture (8) are sequentially arranged from bottom to top on the right side of the adjacent second handling robot (10).

2. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: There are also three groups of channels arranged on the welding bipolar plate processing device, the third fixture (8) is arranged in the first group of channels, the second fixture (7) is arranged in the second group of channels, and the first fixture (5) is arranged in the third group of channels.

3. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: The first loading and unloading mechanism (1), the second loading and unloading mechanism (15), and the third loading and unloading mechanism (16) are all a material transporting platform, and two metal fixture plates (18), two rollers (19), and two limit sensors (20) are arranged on the material transporting platform. The two metal fixture plates (18) are arranged in parallel, and both the two metal fixture plates (18) are connected to the top of the material transporting platform in a lifting manner. One of the rollers (19) is mounted at the front end of one of the metal fixture plates (18), and a limit sensor (20) is arranged below the adjacent roller (19). The other roller (19) is mounted at the front end of the other metal fixture plate (18), and a limit sensor (20) is also arranged below the adjacent roller (19).

4. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: The first fixture (5), the second fixture (7) and the third fixture (8) are all fixture mechanisms. The fixture mechanism includes a welding fixture (54), a fixture positioning plate (55) and a fixture bottom plate (58). The welding fixture (54) is arranged vertically relative to the fixture bottom plate (58), and a positioning space is formed therebetween. An optoelectronic sensor (57) for detecting whether there is material on the welding fixture (54) is further provided on the welding fixture (54). The fixture positioning plate (55) is arranged in the positioning space, and the bottom of the fixture positioning plate (55) is arranged on the fixture bottom plate (58) through several columns (56). Several lifting cylinders (53) for lifting the upper fixture positioning plate (55) are arranged on the fixture bottom plate (58).

5. The automated laser precision welding bipolar plate processing device according to claim 4, wherein: The welding fixture (54) sequentially includes a welding fixture body and an air circuit cover plate from top to bottom. Several first positioning holes (51) are evenly distributed on the welding fixture body, and a first positioning pin (52) is fixedly arranged in each first positioning hole (51). The air circuit cover plate is arranged opposite to the lower fixture positioning plate (55). When the lifting cylinder (53) lifts the fixture positioning plate (55), the air circuit cover plate is in contact with the fixture positioning plate (55).

6. The automated laser precision welding bipolar plate processing device according to claim 1, wherein: The first handling manipulator (3), the second handling manipulator (10) and the third handling manipulator (14) are all manipulator mechanisms. A negative pressure gauge (31) for determining whether the pressure during material suction is normal is arranged on the manipulator mechanism. Several suction nozzles (32) are also evenly distributed on the manipulator mechanism.

7. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: The line scan unit (11) is a line scan camera. A second positioning pin (111) and a third positioning pin (112) are arranged opposite to the top of the line scan camera. A second telescopic cylinder (114) is arranged at the front of the line scan camera, a fourth telescopic cylinder (116) is arranged at the rear of the line scan camera, a third telescopic cylinder (115) is arranged at the left of the line scan camera, and a first telescopic cylinder (113) is arranged at the right of the line scan camera. A wire harness terminal block (117) is also arranged on the line scan camera.

8. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: The coaxial vision galvanometer welding system mechanism (17) includes a QBH fiber optic plug (171), a collimator (172), a coaxial spectroscopic vision module (173), a beam splitter (174), a water-cooled field lens (175), a double-layer air knife (176) and a water-cooled galvanometer (177). The QBH fiber optic plug (171) is arranged at the top end of the collimator (172). The coaxial spectroscopic vision module (173) is arranged at one end of the collimator (172), and the double-layer air knife (176) is arranged at the other end of the collimator (172). The beam splitter (174) is arranged at the bottom end of the collimator (172). The water-cooled field lens (175) and the water-cooled galvanometer (177) are respectively connected to both sides of the extended end of the coaxial spectroscopic vision module (173).

9. The automated laser precision welding bipolar plate processing device according to claim 1, characterized in that: The first laser unit (6) and the second laser unit (9) employ fiber lasers, and the fiber lasers are fiber lasers with a continuous power of 500 W and a fiber core diameter of 14 μm.

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