Laser engraving method and system for bipolar plate airway groove

Abstract

The present invention relates to the technical fields of laser rapid prototyping equipment, visual inspection based on image data processing, data recognition, fuel cells, etc., and provides a laser engraving method and system for a bipolar plate airway groove. When it is detected that a workpiece is fixed on a fixture, a laser engraving machine is controlled to engrave the airway groove on the bipolar plate workpiece. When the engraving is started, a pulse dust collector is turned on to perform pulse dust removal on a workpiece processing and placing station. After the airway groove is processed, the bipolar plate workpiece is controlled to move to a visual inspection station for photography to obtain an image of a bipolar plate containing an airway groove. The airway groove texture depth analysis is performed on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove, thereby improving the processing efficiency of the bipolar plate airway groove, performing environmentally friendly processing, and efficiently detecting the texture depth of the airway groove.

Description

Technical Field

[0001] The present invention relates to the technical fields of laser rapid prototyping equipment, visual detection based on image data processing, data recognition, fuel cells, etc., and in particular to a laser engraving method and system for bipolar plate airway grooves. Background Art

[0002] The bipolar plate is a heat sink used in hydrogen energy batteries. It has a special airflow channel design and dense airway grooves on the airflow channel to effectively distribute and manage the flow of hydrogen and oxygen in the fuel cell. In the prior art, the airway grooves of the bipolar plate airflow channel are cut using CNC, and the airway grooves are quality inspected after production. As a result, the production time of the bipolar plate airflow channel is long, and there is dust during the cutting process, which is unhealthy and not environmentally friendly. Moreover, the inspection of the airway grooves also requires the bipolar plate to be transported to other inspection equipment for inspection, resulting in low inspection efficiency and great inspection difficulty.

[0003] In summary, the existing bipolar plate airway groove processing technology has technical problems such as low efficiency and environmental pollution. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned prior art, the present invention provides a laser engraving method and system for a bipolar plate airway groove, so as to improve the processing efficiency of the bipolar plate airway groove, perform environmentally friendly processing, and efficiently detect the texture depth of the airway groove.

[0005] In a first aspect, the present invention provides a laser engraving method for a bipolar plate airway groove, comprising:

[0006] When it is detected that the bipolar plate workpiece is placed on the fixture of the workpiece processing and placing station of the laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving on the bipolar plate workpiece along a preset laser engraving path to obtain the required airway groove formed on the bipolar plate workpiece;

[0007] When the laser engraving machine starts to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece, the pulse dust collector located on one side of the laser engraving machine is controlled to be turned on; the pulse dust collector is connected to a dust extractor arranged on one side of the workpiece processing and placing station of the laser engraving machine to perform pulse dust removal on the workpiece processing and placing station;

[0008] After the required airway groove is formed on the bipolar plate workpiece, the jig is controlled to move to a visual inspection station on the laser engraving machine, which is arranged on one side of the workpiece processing and placing station. When the jig moves to the visual inspection station, the visual lens module arranged on one side of the visual inspection station is controlled to photograph the bipolar plate workpiece with the required airway groove formed thereon, so as to obtain an image of the bipolar plate containing the airway groove.

[0009] The airway groove texture depth analysis is performed on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove.

[0010] Further, the method of detecting whether the bipolar plate workpiece is fixed on the fixture includes:

[0011] When the pick-and-place robot places the bipolar plate workpiece on a fixture of a workpiece processing pick-and-place station of a laser engraving machine and fixes it, an image of the workpiece fixed by a visual device of the pick-and-place robot is obtained;

[0012] According to the workpiece fixing image, it is determined whether the bipolar plate workpiece is completely fixed on the jig.

[0013] Further, judging whether the bipolar plate workpiece is fixed on the jig according to the workpiece fixing image includes:

[0014] Performing bipolar plate fixing state analysis on the workpiece fixing image to determine the fixing state of the bipolar plate workpiece on the fixture;

[0015] According to the fixing state of the bipolar plate workpiece on the jig, it is determined whether the bipolar plate workpiece is completely fixed on the jig.

[0016] Further, judging whether the bipolar plate workpiece is completely fixed on the jig according to the fixing state of the bipolar plate workpiece on the jig includes:

[0017] When it is determined that the bipolar plate workpiece is accurately fixed on the jig, controlling the chassis door of the laser engraving machine to open and close;

[0018] The closing state of the chassis door is detected, and when it is confirmed that the chassis door is closed, the bipolar plate workpiece is fixed on the fixture.

[0019] Furthermore, the laser engraving machine includes a machine platform, a frame and a laser engraving component; the frame is installed on the machine platform, and the laser engraving component is installed on the frame; the workpiece processing and placing station of the laser engraving machine is arranged on the machine platform, and the jig is located on the workpiece processing and placing station; the laser engraving component performs laser engraving on the bipolar plate workpiece with a preset laser engraving path.

[0020] Furthermore, when the laser engraving component performs laser engraving on the bipolar plate workpiece along a preset laser engraving path, the jig is in a stationary state, so that the laser engraving component performs laser engraving on the bipolar plate workpiece along a small area engraving path within the preset laser engraving path.

[0021] Furthermore, when the laser engraving component performs laser engraving on the bipolar plate workpiece along a preset laser engraving path, the jig moves along a preset motion coordination path to cooperate with the laser engraving component to perform laser engraving on the bipolar plate workpiece along a large-area engraving path in the preset laser engraving path.

[0022] Furthermore, the laser engraving assembly includes a laser, a laser galvanometer and a Z-axis module; the Z-axis module is installed on the frame and connected to the laser galvanometer to adjust the depth of the airway groove texture of the bipolar plate workpiece engraved by the laser galvanometer during the lifting process; the laser is connected to the laser galvanometer, and the emitted laser is guided to the bipolar plate workpiece through the laser galvanometer to perform laser engraving on the bipolar plate workpiece with a preset laser engraving path.

[0023] Furthermore, the fixture is installed on the Y-axis module, the Y-axis module is installed on the X-axis module, and the X-axis module is installed on the machine platform; the X-axis module drives the Y-axis module and the fixture to move in the X-axis direction, and the Y-axis module drives the fixture to move in the Y-axis direction.

[0024] In a second aspect, the present invention provides a laser engraving system for a bipolar plate airway groove, comprising:

[0025] Controlling a host computer to execute any of the above-mentioned laser engraving methods for the airway grooves of a bipolar plate;

[0026] The laser engraving machine comprises a visual lens module; the laser engraving machine is connected and communicated with the control host and works under the control of the control host;

[0027] The pulse dust collector is connected to the dust extractor arranged on one side of the workpiece processing and placing station of the laser engraving machine, and is connected and communicated with the control host, and works under the control of the control host.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention provides a method and system for laser engraving airway grooves of a bipolar plate. When a bipolar plate workpiece is placed on a fixture of a workpiece processing and placing station of a laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece, so as to obtain the required airway grooves formed on the bipolar plate workpiece. When the laser laser engraving machine starts to laser engrave the preset laser engraving path on the bipolar plate workpiece, a pulse dust collector located on one side of the laser laser engraving machine is controlled to be turned on; the pulse dust collector is connected to a dust extractor arranged on one side of the workpiece processing and placing station of the laser laser engraving machine, so as to perform pulse engraving on the workpiece processing and placing station. Dust removal, after the required airway groove is formed on the bipolar plate workpiece, the jig is controlled to move to the visual inspection station on the laser engraving machine which is arranged on one side of the workpiece processing and placing station, and when the jig moves to the visual inspection station, the visual lens module arranged on one side of the visual inspection station is controlled to photograph the bipolar plate workpiece with the required airway groove formed thereon to obtain an image of the bipolar plate containing the airway groove, and the airway groove texture depth analysis is performed on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove, thereby improving the processing efficiency of the bipolar plate airway groove, performing environmentally friendly processing, and efficiently detecting the texture depth of the airway groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their description are used to explain the present invention and do not constitute an improper limitation of the present invention. Some specific embodiments of the present invention will be described in detail in an exemplary and non-restrictive manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0031] Figure 1 It is a schematic flow chart of a method for laser engraving an airway groove of a bipolar plate according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of a laser engraving machine according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of the architecture of a laser engraving system for a bipolar plate airway groove according to an embodiment of the present invention;

[0034] Figure 4 It is a structural schematic diagram of a bipolar plate workpiece according to an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Machine; 10. Chassis door;

[0037] 2. Frame; 20. Vacuum extractor;

[0038] 3. Laser engraving component; 30. Laser; 31. Laser galvanometer; 32. Z-axis module;

[0039] 4. Fixtures;

[0040] 5. Y-axis module;

[0041] 6. X-axis module;

[0042] 7. Visual lens module;

[0043] 8. Bipolar plate workpiece; 80. Airway groove;

[0044] 90. Control host; 91. Pulse dust collector. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only an embodiment of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0046] Embodiment 1

[0047] See also Figure 1-Figure 4 This embodiment provides a laser engraving method for a bipolar plate airway groove 80 , including step S101 , step S102 , step S103 and step S104 .

[0048] S101, when it is detected that the bipolar plate workpiece 8 is placed on the fixture 4 of the workpiece processing and placing station of the laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving on the bipolar plate workpiece 8 along a preset laser engraving path, so as to obtain the required airway groove 80 formed on the bipolar plate workpiece 8;

[0049] S102, when the laser engraving machine starts to perform laser engraving of the bipolar plate workpiece 8 along a preset laser engraving path, the pulse dust collector 91 located on one side of the laser engraving machine is controlled to be turned on; the pulse dust collector 91 is connected to the dust extractor 20 provided on the laser engraving machine on one side of the workpiece processing and placing station to perform pulse dust removal on the workpiece processing and placing station;

[0050] S103, after the required airway groove 80 is formed on the bipolar plate workpiece 8, the jig 4 is controlled to move to the visual inspection station arranged on the laser engraving machine at one side of the workpiece processing and placing station, and when the jig 4 moves to the visual inspection station, the visual lens module 7 arranged at one side of the visual inspection station is controlled to photograph the bipolar plate workpiece 8 with the required airway groove 80 formed thereon, so as to obtain a bipolar plate image containing the airway groove 80;

[0051] S104 , performing a texture depth analysis of the airway groove 80 on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove 80 .

[0052] It should be noted that, in the present embodiment, by detecting that the bipolar plate workpiece 8 is placed on the fixture 4 of the workpiece processing and placing station of the laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece 8, so as to obtain the required airway groove 80 formed on the bipolar plate workpiece 8. When the laser laser engraving machine starts to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece 8, the pulse dust collector 91 located on one side of the laser laser engraving machine is controlled to be turned on; the pulse dust collector 91 is connected to the dust extractor 20 arranged on the side of the workpiece processing and placing station of the laser laser engraving machine to perform pulse dust removal on the workpiece processing and placing station, and the pulse dust collector 91 is connected to the dust extractor 20 arranged on the side of the workpiece processing and placing station of the laser laser engraving machine to perform pulse dust removal on the workpiece processing and placing station. After the required airway groove 80 is formed on the workpiece 8, the jig 4 is controlled to move to the visual inspection station on the laser engraving machine which is arranged on one side of the workpiece processing and placing station, and when the jig 4 moves to the visual inspection station, the visual lens module 7 arranged on one side of the visual inspection station is controlled to photograph the bipolar plate workpiece 8 with the required airway groove 80 formed thereon, so as to obtain an image of the bipolar plate containing the airway groove 80, and the airway groove 80 texture depth analysis is performed on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove 80, thereby improving the processing efficiency of the bipolar plate airway groove 80, performing environmentally friendly processing, and efficiently detecting the texture depth of the airway groove 80.

[0053] In step S101, when it is detected that the bipolar plate workpiece 8 is placed on the jig 4 of the workpiece processing and placing station of the laser engraving machine and fixed, the laser engraving machine is controlled to perform laser engraving on the bipolar plate workpiece 8 along a preset laser engraving path to obtain the required airway groove 80 formed on the bipolar plate workpiece 8, thereby avoiding the use of existing CNC technology to process the required airway groove 80, improving processing efficiency, and reducing processing dust.

[0054] In some preferred embodiments, the method for detecting whether the bipolar plate workpiece 8 is fixed on the jig 4 includes: when the pick-up and place robot places the bipolar plate workpiece 8 on the jig 4 of the workpiece processing pick-up and place station of the laser engraving machine for fixation, obtaining the workpiece fixation image collected by the visual device of the pick-up and place robot; judging whether the bipolar plate workpiece 8 is fixed on the jig 4 according to the workpiece fixation image. Further, judging whether the bipolar plate workpiece 8 is fixed on the jig 4 according to the workpiece fixation image includes: performing bipolar plate fixation state analysis on the workpiece fixation image to judge the fixation state of the bipolar plate workpiece 8 on the jig 4; judging whether the bipolar plate workpiece 8 is fixed on the jig 4 according to the fixation state of the bipolar plate workpiece 8 on the jig 4. It should be noted that, in the present embodiment, when the material picking and placing robot places the bipolar plate workpiece 8 on the jig 4 of the workpiece processing and placing station of the laser engraving machine for fixing, the visual device of the material picking and placing robot collects the workpiece fixing image, and analyzes the workpiece fixing image collected by the visual device of the material picking and placing robot to determine whether the bipolar plate workpiece 8 is fixed on the jig 4. During the material placing process, the fixing state of the bipolar plate workpiece 8 on the jig 4 is simultaneously completed, thereby reducing the setting of other fixing state judgment devices or components and simplifying the structure of the laser engraving machine.

[0055] In some further preferred embodiments, whether the bipolar plate workpiece 8 is completely fixed on the jig 4 is judged according to the fixing state of the bipolar plate workpiece 8 on the jig 4, including: when it is determined that the bipolar plate workpiece 8 is accurately fixed on the jig 4, controlling the opening and closing of the chassis door 10 of the laser engraving machine; detecting the closing state of the chassis door 10, and when it is confirmed that the chassis door 10 is closed, obtaining that the bipolar plate workpiece 8 is completely fixed on the jig 4. It should be noted that, in the present embodiment, whether the bipolar plate workpiece 8 is fixed on the jig 4 is finally confirmed by the opening and closing state of the chassis door 10 of the laser engraving machine. When it is confirmed that the chassis door 10 is closed, it is obtained that the bipolar plate workpiece 8 is fixed on the jig 4. This not only realizes the detection of whether the bipolar plate workpiece 8 is placed on the jig 4 at the workpiece processing and placing station of the laser engraving machine and is fixed, but also ensures that the chassis door 10 is in a closed state, which can ensure safe operation when the laser engraving is started, and at the same time avoid the spread of processing dust through the chassis door 10, endangering the health of the operator and causing environmental pollution.

[0056] In step S102, when the laser engraving machine starts to perform laser engraving of the preset laser engraving path on the bipolar plate workpiece 8, the pulse dust collector 91 located on one side of the laser engraving machine is controlled to be turned on, and the pulse dust collector 91 is connected to the dust extractor 20 on the side of the workpiece processing and placing station of the laser engraving machine to perform pulse dust removal on the workpiece processing and placing station, thereby realizing pulse dust removal of the processing dust generated by laser engraving on the workpiece processing and placing station, avoiding the spread of processing dust, endangering the health of operators, and causing environmental pollution. Further, when the chassis door 10 is closed, the bipolar plate workpiece 8 is fixed on the fixture 4, the laser engraving machine starts laser engraving of the bipolar plate workpiece 8, and the pulse dust collector 91 is turned on. In this embodiment, the chassis door 10 is closed, the laser engraving is started, and safe operation is performed. The pulse dust collector 91 in the chassis is turned on, and the dust extractor 20 is connected to the pulse dust collector 91 to perform pulse dust removal on the processing dust generated by laser engraving at the workpiece processing and placing station, thereby preventing the processing dust from spreading through the chassis door 10, endangering the health of operators and causing environmental pollution.

[0057] In step S103, after the required airway groove 80 is formed on the bipolar plate workpiece 8, the jig 4 is controlled to move to the visual inspection station on the laser engraving machine, which is arranged on the side of the workpiece processing and placing station, and when the jig 4 moves to the visual inspection station, the visual lens module 7 arranged on the side of the visual inspection station is controlled to take a picture of the bipolar plate workpiece 8 with the required airway groove 80 formed, so as to obtain a bipolar plate image containing the airway groove 80, thereby providing a data basis for the subsequent texture depth analysis of the bipolar plate airway groove 80. It should be noted that in this embodiment, the visual lens module 7 is arranged on the side of the visual inspection station, and the visual inspection station is arranged on the side of the workpiece processing and placing station, so that the visual lens module 7 is integrated with the laser engraving machine, and cooperates with the jig 4 on the laser engraving machine to capture the image of the bipolar plate workpiece 8 after the required airway groove 80 is formed on the jig 4, thereby realizing centralized machine vision inspection and improving inspection efficiency. In some preferred embodiments, the laser engraving machine includes a machine table 1, a frame 2 and a laser engraving assembly 3; the frame 2 is mounted on the machine table 1, and the laser engraving assembly 3 is mounted on the frame 2; the workpiece processing and placing station of the laser engraving machine is arranged on the machine table 1, and the fixture 4 is located at the workpiece processing and placing station; the laser engraving assembly 3 performs laser engraving of the bipolar plate workpiece 8 in a preset laser engraving path. It should be noted that in this embodiment, the frame 2 is mounted on the machine table 1, the laser engraving assembly 3 is mounted on the frame 2, the workpiece processing and placing station of the laser engraving machine is arranged on the machine table 1, and the fixture 4 is located at the workpiece processing and placing station, so that the structure of the laser engraving machine is compact. In some preferred embodiments, when the laser engraving component 3 performs laser engraving of the preset laser engraving path on the bipolar plate workpiece 8, the jig 4 is in a stationary state, so that the laser engraving component 3 performs laser engraving of a small area engraving path (such as an area of ​​10 mm x 10 mm) in the preset laser engraving path on the bipolar plate workpiece 8. It should be noted that in this embodiment, the workpiece processing and placing station is fixed on the machine table 1, and the jig 4 is located on the workpiece processing and placing station. The jig 4 remains stationary during the laser engraving process, which helps to ensure that when the laser engraving component 3 performs engraving of the preset laser engraving path, the accuracy of the engraving path will not be affected by the movement of the workpiece, thereby achieving high-precision small-area engraving. Among them, the stationary state of the jig 4 can effectively prevent displacement errors from occurring during the engraving process, especially in small-area engraving paths, where higher accuracy requirements are required, and any slight offset may affect the final engraving quality.In some preferred embodiments, when the laser engraving assembly 3 performs laser engraving of the bipolar plate workpiece 8 in a preset laser engraving path, the jig 4 moves in a preset motion matching path to cooperate with the laser engraving assembly 3 to perform laser engraving of a large-area engraving path (such as an area of ​​100 mm x 100 mm) in the preset laser engraving path on the bipolar plate workpiece 8. It should be noted that when performing large-area engraving in the preset laser engraving path, if only relying on the engraving coverage of the laser engraving assembly 3, the entire engraving area may not be covered. Therefore, by moving the jig 4 along the preset motion matching path, the coverage of the laser engraving can be expanded to ensure that the engraving of a large area in the preset laser engraving path can be completed. In the engraving of a large area in the preset laser engraving path, if the jig 4 is fixed, the laser engraving assembly 3 needs to be repositioned or adjusted multiple times to cover the entire area. This will significantly reduce the engraving efficiency. Through the coordinated movement of the jig 4, the number of adjustments of the laser engraving assembly 3 can be reduced, making the engraving process smoother, thereby improving the overall processing efficiency. In some preferred embodiments, the laser engraving assembly 3 includes a laser 30, a laser galvanometer 31 and a Z-axis module 32; the Z-axis module 32 is mounted on the frame 2 and connected to the laser galvanometer 31 to adjust the texture depth of the airway groove 80 of the bipolar plate workpiece 8 engraved by the laser galvanometer 31 during the lifting process; the laser 30 is connected to the laser galvanometer 31, and the emitted laser is guided to the bipolar plate workpiece 8 through the laser galvanometer 31 to perform laser engraving of the bipolar plate workpiece 8 with a preset laser engraving path. It should be noted that the Z-axis module 32 adjusts the depth of laser engraving by controlling the height (lifting process) of the laser galvanometer 31. Through the adjustment of the Z-axis module 32, the focal position of the laser can be dynamically adjusted according to the needs of different areas during the engraving process, thereby achieving precise control of the engraving depth and ensuring that the engraved airway groove 80 has consistent depth and quality. The function of the laser galvanometer 31 is to accurately reflect and guide the laser emitted by the laser 30 to a specific position of the workpiece. The laser galvanometer 31 can control the moving path of the laser beam at extremely high speed and precision, which enables laser engraving to be performed with high precision on complex paths. The preset laser engraving path may include complex shapes and multi-level structures. Through the adjustment of the Z-axis module 32, it can adapt to the engraving requirements of different depths and levels, ensuring that consistent quality can be maintained when engraving airway grooves 80 at different levels. In some preferred embodiments, the fixture 4 is mounted on the Y-axis module 5, the Y-axis module 5 is mounted on the X-axis module 6, and the X-axis module 6 is mounted on the machine 1; the X-axis module 6 drives the Y-axis module 5 and the fixture 4 to move in the X-axis direction, and the Y-axis module 5 drives the fixture 4 to move in the Y-axis direction. It should be noted that in this embodiment, through the combination of the X-axis and Y-axis modules 5, the fixture 4 can move freely on a two-dimensional plane (XY plane).This setting allows the laser engraving machine to accurately position and process workpieces within a larger working range, meeting the needs of laser engraving with complex texture depth or multiple locations.

[0058] In some further preferred embodiments, the X-axis module 6 drives the jig 4 to move in the X-axis direction, and the Y-axis module 5 drives the jig 4 to move in the Y-axis direction, and cooperates with the laser engraving component 3 to perform laser engraving on the bipolar plate workpiece 8 in a large-area engraving path (such as an area of ​​100 mm x 100 mm) in the preset laser engraving path; the X-axis module 6 also drives the jig 4 to move to the visual inspection station set on the side of the workpiece processing and placing station on the laser laser engraving machine after forming the required airway groove 80 on the bipolar plate workpiece 8. It should be noted that in this embodiment, the X-axis module 6 is not only used to move the jig 4 during the engraving process, but also to drive the workpiece after engraving, so that the workpiece moves to the visual inspection station, thereby reducing the independent moving components required in the laser laser engraving machine. For example, no additional transmission system or independent workpiece moving device is required. By making full use of the existing X-axis module 6, the mechanical and control components required for the laser laser engraving machine as a whole are reduced, thereby reducing the equipment manufacturing cost and maintenance cost. At the same time, by using the same X-axis module 6 for engraving and workpiece transmission, the structure of the laser laser engraving machine is simplified. This not only means a simpler mechanical structure, but also means that various movements can be more easily managed and coordinated during control. Reducing independent transmission systems reduces potential failure points, making control more reliable, while also reducing the complexity of debugging and operation.

[0059] S104, analyzing the airway groove 80 texture depth of the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove 80. In some preferred embodiments, analyzing the airway groove 80 texture depth of the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove 80 includes: analyzing all the airway groove 80 texture depths in the bipolar plate image one by one, and when there is one airway groove 80 texture depth unqualified among all the airway groove 80 texture depths, it is determined that the laser engraving quality of the bipolar plate containing the airway groove 80 is unqualified. It should be noted that the role of the bipolar plate in the fuel cell is crucial, and the texture depth of the airway groove 80 directly affects the fluidity of the gas and the overall performance of the fuel cell. If the depth of any airway groove 80 does not meet the requirements, it may cause uneven airflow distribution, thereby affecting the efficiency and stability of the fuel cell. Therefore, strictly controlling the texture depth of each airway groove 80 and ensuring that each part meets the design standards is the key to ensuring the functionality and reliability of the bipolar plate. In this embodiment, even if only one airway groove 80 has unqualified texture depth, the laser engraving quality of the bipolar plate containing the airway groove 80 is determined to be unqualified, thereby achieving strict control of the reliability of the bipolar plate and improving the safety performance of the bipolar plate.

[0060] Embodiment 2

[0061] See also Figure 1-Figure 4 The present embodiment provides a laser engraving system for a bipolar plate airway groove 80, comprising:

[0062] Controlling the host 90 to execute the laser engraving method of the bipolar plate airway groove 80 described in any one of the above items;

[0063] The laser engraving machine includes a visual lens module 7; the laser engraving machine is connected to the control host 90 for communication and works under the control of the control host 90;

[0064] The pulse dust collector 91 is connected to the dust extractor 20 arranged on one side of the workpiece processing and placing station of the laser engraving machine, and is connected and communicated with the control host 90, and works under the control of the control host 90.

[0065] It should be noted that, in the present embodiment, the control host 90 runs the laser engraving method of the bipolar plate airway groove 80 described in any one of the above items, and when it is detected that the bipolar plate workpiece 8 is placed on the fixture 4 of the workpiece processing and placing station of the laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece 8, so as to obtain the required airway groove 80 formed on the bipolar plate workpiece 8. When the laser laser engraving machine starts to laser engrave the bipolar plate workpiece 8 with a preset laser engraving path, the pulse dust collector 91 located on one side of the laser laser engraving machine is controlled to be turned on; the pulse dust collector 91 is connected to the dust extractor 20 arranged on the side of the workpiece processing and placing station of the laser laser engraving machine, so as to process the workpiece. The placing station is pulsed for dust removal, and after the required airway groove 80 is formed on the bipolar plate workpiece 8, the jig 4 is controlled to move to the visual inspection station arranged on the side of the workpiece processing and placing station on the laser engraving machine, and when the jig 4 moves to the visual inspection station, the visual lens module 7 arranged on the side of the visual inspection station is controlled to photograph the bipolar plate workpiece 8 with the required airway groove 80 formed thereon, so as to obtain an image of the bipolar plate containing the airway groove 80, and the airway groove 80 texture depth analysis is performed on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove 80, thereby improving the processing efficiency of the bipolar plate airway groove 80, performing environmentally friendly processing, and efficiently detecting the texture depth of the airway groove 80.

[0066] The above embodiments are only preferred specific implementation modes of the present invention, and the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A laser engraving method for a bipolar plate airway groove, characterized in that: include: When it is detected that the bipolar plate workpiece is placed on the fixture of the workpiece processing and placing station of the laser laser engraving machine and fixed, the laser laser engraving machine is controlled to perform laser engraving on the bipolar plate workpiece along a preset laser engraving path to obtain the required airway groove formed on the bipolar plate workpiece; When the laser engraving machine starts to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece, the pulse dust collector located on one side of the laser engraving machine is controlled to be turned on; the pulse dust collector is connected to a dust extractor arranged on one side of the workpiece processing and placing station of the laser engraving machine to perform pulse dust removal on the workpiece processing and placing station; After the required airway groove is formed on the bipolar plate workpiece, the jig is controlled to move to a visual inspection station on the laser engraving machine, which is arranged on one side of the workpiece processing and placing station. When the jig moves to the visual inspection station, the visual lens module arranged on one side of the visual inspection station is controlled to photograph the bipolar plate workpiece with the required airway groove formed thereon, so as to obtain an image of the bipolar plate containing the airway groove. Performing airway groove texture depth analysis on the bipolar plate image to control the laser engraving quality of the bipolar plate containing the airway groove; The laser engraving machine includes a machine platform, a frame and a laser engraving component; the frame is installed on the machine platform, and the laser engraving component is installed on the frame; the workpiece processing and placing station of the laser engraving machine is arranged on the machine platform, and the jig is located on the workpiece processing and placing station; the laser engraving component performs laser engraving of a preset laser engraving path on the bipolar plate workpiece; when the laser engraving component performs laser engraving of a preset laser engraving path on the bipolar plate workpiece, the jig moves in a preset motion matching path to cooperate with the laser engraving component to perform laser engraving of a large-area engraving path in the preset laser engraving path on the bipolar plate workpiece; the laser engraving component includes a laser, a laser galvanometer and a Z-axis module; the Z-axis module is installed on the frame and connected to the laser galvanometer to During the lifting process, the depth of the airway groove texture of the bipolar plate workpiece engraved by the laser galvanometer is adjusted; the laser is connected to the laser galvanometer, and the emitted laser is guided to the bipolar plate workpiece through the laser galvanometer to perform laser engraving of a preset laser engraving path on the bipolar plate workpiece; the jig is installed on the Y-axis module, the Y-axis module is installed on the X-axis module, and the X-axis module is installed on the machine platform; the X-axis module drives the Y-axis module and the jig to move in the X-axis direction, and the Y-axis module drives the jig to move in the Y-axis direction; when the laser engraving component performs laser engraving of a preset laser engraving path on the bipolar plate workpiece, the jig is in a stationary state, so that the laser engraving component performs laser engraving of a small area engraving path in the preset laser engraving path on the bipolar plate workpiece; The X-axis module drives the jig to move in the X-axis direction, and the Y-axis module drives the jig to move in the Y-axis direction, cooperating with the laser engraving component to laser engrave a large-area engraving path in a preset laser engraving path on the bipolar plate workpiece; after the X-axis module forms the required airway groove on the bipolar plate workpiece, it drives the jig to move to the visual inspection station on the laser engraving machine set on one side of the workpiece processing and placing station.

2. The laser engraving method for the bipolar plate airway groove according to claim 1, characterized in that: The method of detecting that the bipolar plate workpiece is fixed on the fixture includes: When the pick-and-place robot places the bipolar plate workpiece on a fixture of a workpiece processing pick-and-place station of a laser engraving machine and fixes it, an image of the workpiece fixed by a visual device of the pick-and-place robot is obtained; According to the workpiece fixing image, it is determined whether the bipolar plate workpiece is completely fixed on the jig.

3. The laser engraving method for the bipolar plate airway groove according to claim 2, characterized in that: Judging whether the bipolar plate workpiece is fixed on the jig according to the workpiece fixing image includes: Performing bipolar plate fixing state analysis on the workpiece fixing image to determine the fixing state of the bipolar plate workpiece on the fixture; According to the fixing state of the bipolar plate workpiece on the jig, it is determined whether the bipolar plate workpiece is completely fixed on the jig.

4. The laser engraving method for the bipolar plate airway groove according to claim 3, characterized in that: According to the fixing state of the bipolar plate workpiece on the jig, judging whether the bipolar plate workpiece is completely fixed on the jig includes: When it is determined that the bipolar plate workpiece is accurately fixed on the jig, controlling the chassis door of the laser engraving machine to open and close; The closing state of the chassis door is detected, and when it is confirmed that the chassis door is closed, the bipolar plate workpiece is fixed on the fixture.

5. A laser engraving system for bipolar plate airway grooves, characterized in that: include: Controlling a host computer to execute the laser engraving method for the airway groove of a bipolar plate according to any one of claims 1 to 4; The laser engraving machine comprises a visual lens module; the laser engraving machine is connected and communicated with the control host and works under the control of the control host; The pulse dust collector is connected to the dust extractor arranged on one side of the workpiece processing and placing station of the laser engraving machine, and is connected and communicated with the control host, and works under the control of the control host.

Images