Equipment for automatically detecting appearance of metal bipolar plate coating

Abstract

The utility model relates to the technical field of bipolar plate coating appearance detection, and particularly discloses metal bipolar plate coating appearance automatic detection equipment which comprises a box body, a controller arranged on the outer side of the box body, and a detection system arranged on the inner side of the box body, the detection system comprises a marble platform, a feeding rotating platform, a discharging rotating platform, a feeding and discharging mechanical arm, a suction cup jig assembly, a code scanning mechanism, a linear coaxial light source, a camera assembly, a mechanical arm and a turnover mechanism, the controller comprises a displayer, a host and a PLC, and the host is electrically connected with the camera assembly, the code scanning mechanism, the displayer and the PLC. The PLC is electrically connected with the feeding rotating platform, the discharging rotating platform, the feeding and discharging mechanical arm, the suction cup jig assembly, the code scanning mechanism, the linear coaxial light source, the camera assembly, the mechanical arm and the turnover mechanism. The host is provided with detection software and PLC operation software. According to the utility model, automatic detection of the appearance defects of the metal bipolar plate coating is realized by adopting detection software and PLC (Programmable Logic Controller) control.

Description

Technical Field

[0001] The utility model relates to the technical field of appearance detection of bipolar plate coatings, in particular to an automatic detection device for the appearance of metal bipolar plate coatings. Background Technique

[0002] The bipolar plate is one of the core components of a fuel cell stack. The function of the bipolar plate is to conduct electrons, distribute reaction gases and take away the generated water. Functionally, the bipolar plate material is required to be a good conductor of electricity and heat, have a certain strength and gas tightness, etc. Metals and alloys are often used to make metal bipolar plates for hydrogen fuel cells because of their good mechanical properties and electrical conductivity, and low price. However, metal bipolar plates are prone to corrosion and have poor stability. Therefore, coating modification is required on the surface of metal bipolar plates. The coated metal bipolar plate can improve the corrosion resistance of the bipolar plate while ensuring good electrical conductivity, and improve the output life of the fuel cell.

[0003] If defects such as film peeling, scratches, coating bumps, coating pits, and stains caused by unclean cleaning appear on the coating, it is easy to cause the metal bipolar plate to be corroded, resulting in a decline in the performance of the fuel cell, which has a great impact on the life and power generation efficiency of the fuel cell. Therefore, after the coating process of the metal bipolar plate is completed, it is necessary for inspectors to conduct appearance inspection on the metal bipolar plate. Since manual inspection requires constantly adjusting the angle of the bipolar plate to detect defects and cannot distinguish tiny defects, the inspection speed is slow, the labor intensity of the personnel is high, the inspectors are prone to fatigue, resulting in false inspection and missed inspection, the labor cost is high, and the inspection efficiency is low. Content of the Utility Model

[0004] The purpose of the utility model is to provide an automatic detection device for the appearance of metal bipolar plate coatings to solve the problems put forward in the above background technique.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An automatic detection device for the appearance of metal bipolar plate coatings, including a box body, a controller is arranged outside the box body, a detection system is arranged inside the box body, the detection system includes a marble platform and a loading rotary platform, a unloading rotary platform, a loading and unloading robotic arm, a suction cup fixture assembly, a code scanning mechanism, a linear coaxial light source, a frame and a flipping mechanism installed on the marble platform, camera assemblies and manipulators are respectively arranged on both sides of the frame, and a box door one and a box door two are arranged on the box body.

[0007] As a further solution of the present utility model, the position of the loading rotating platform corresponds to the box door one by one. The loading rotating platform includes a rotating platform one, a loading frame one, a loading frame two and a lifting part one. The loading frame one and the loading frame two are centrosymmetric about the center of the rotating platform one and are located above the rotating platform one. The lifting part one is located below the rotating platform one. Both the loading frame one and the loading frame two are provided with a sensor one and a sensor two.

[0008] As a further solution of the present utility model, the position of the unloading rotating platform corresponds to the box door two. The unloading rotating platform includes a rotating platform two, an unloading frame one, an unloading frame two and a lifting part two. The unloading frame one and the unloading frame two are centrosymmetric about the center of the rotating platform two and are located above the rotating platform two. The lifting part two is located below the rotating platform two. Both the unloading frame one and the unloading frame two are provided with a sensor three.

[0009] As a further solution of the present utility model, the loading and unloading robotic arm includes a base, a rotating arm installed on the base, a clamping arm one and a vacuum suction cup fixture one installed on the rotating arm. A cylinder one is arranged inside the clamping arm one, and the cylinder one is connected to the vacuum suction cup fixture one.

[0010] As a further solution of the present utility model, the suction cup fixture assembly includes a suction cup fixture assembly one and a suction cup fixture assembly two. The suction cup fixture assembly one and the suction cup fixture assembly two are parallel in position and are respectively located on both sides of the loading and unloading robotic arm. The position of the suction cup fixture assembly one corresponds to the loading rotating platform. The suction cup fixture assembly one includes a linear motor module one and a suction cup fixture platform one installed on the linear motor module one. The position of the suction cup fixture assembly two corresponds to the unloading rotating platform. The suction cup fixture assembly two includes a linear motor module two and a suction cup fixture platform two installed on the linear motor module two. Suction cup fixtures are provided on both the suction cup fixture platform one and the suction cup fixture platform two, and a sensor four is provided on the suction cup fixture.

[0011] As a further solution of the present utility model, the code scanning mechanism includes a code scanner and a code scanner bracket. The code scanner bracket is located on one side of the linear motor module one, and the code scanner is installed on the code scanner bracket and above the linear motor module one.

[0012] As a further solution of the present utility model, the camera assembly includes a linear motor module three horizontally arranged on the frame. A lead screw transmission part is vertically installed on the linear motor module three, and a line scan camera is installed on the lead screw transmission part. A lens is provided on the line scan camera.

[0013] As a further solution of the present utility model, the linear coaxial light source includes a first linear coaxial light source and a second linear coaxial light source. The first linear coaxial light source is located above the first linear motor module, and the second linear coaxial light source is located above the second linear motor module. The positions of the first linear coaxial light source and the second linear coaxial light source form a straight line parallel to the third linear motor module and directly below the moving position of the lens of the line scan camera.

[0014] As a further solution of the present utility model, the manipulator is provided with a fourth linear motor module, a second clamping arm mounted on the fourth linear motor module, and a second vacuum chuck fixture. A second air cylinder is arranged inside the second clamping arm, and the second air cylinder is connected to the second vacuum chuck fixture. The flipping mechanism includes a flipping rod, a third vacuum chuck fixture mounted on the flipping rod, and a fifth inductor mounted on the third vacuum chuck fixture.

[0015] As a further solution of the present utility model, the controller includes a computer and a PLC. The computer includes a display and a host. The PLC is a programmable logic controller and is electrically connected to the loading rotary platform, the unloading rotary platform, the loading and unloading manipulator, the suction cup fixture assembly, the code scanning mechanism, the linear coaxial light source, the camera assembly, the manipulator, and the flipping mechanism. The host is electrically connected to the PLC, the display, the code scanning mechanism, and the camera assembly respectively. The host includes detection software and PLC operation software.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. In the present utility model, the host is electrically connected to the PLC. The host includes PLC operation software. The PLC is electrically connected to the loading rotary platform, the unloading rotary platform, the loading and unloading manipulator, the suction cup fixture assembly, the code scanning mechanism, the linear coaxial light source, the camera assembly, the manipulator, and the flipping mechanism. The PLC controls the movement of the loading rotary platform, the unloading rotary platform, the loading and unloading manipulator, the suction cup fixture assembly, the code scanning mechanism, the linear coaxial light source, the camera assembly, the manipulator, and the flipping mechanism through the control program set by the PLC operation software, realizing automated operation and reducing labor costs.

[0018] 2. In the present utility model, the host is electrically connected to the display, the code scanning mechanism, and the camera assembly respectively. The host includes detection software, which can automatically identify various defects in the coating of the metal bipolar plate, improving the detection efficiency and accuracy.

[0019] 3. In the present utility model, by using vacuum adsorption for the product, friction is reduced, scratches on the coating of the metal bipolar plate are prevented, the adsorption is flatter, and the detection accuracy is further improved.

[0020] 4. The utility model adopts a line-scan camera in cooperation with a linear coaxial light source, with a faster scanning speed, higher resolution, clearer pictures, and improved detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings are used to provide a further understanding of the utility model and constitute a part of the specification. Together with the embodiments of the utility model, they are used to explain the utility model and do not constitute a limitation to the utility model. In the drawings:

[0022] Figure 1 is a three-dimensional schematic diagram of the utility model;

[0023] Figure 2 is a three-dimensional schematic diagram of the detection system of the utility model;

[0024] Figure 3 is a three-dimensional schematic diagram of the detection system of the utility model (from another perspective);

[0025] In the figures: 1, box body; 2, marble platform; 3, frame; 4, loading rotary platform; 5, unloading rotary platform; 6, loading and unloading robotic arm; 7, suction cup fixture assembly; 8, camera assembly; 9, robotic hand; 10, flipping mechanism; 11, code scanning mechanism; 12, door one; 13, door two; 14, display; 15, spare tray; 31, cross beam; 32, column; 41, rotary platform one; 42, loading frame one; 43, loading frame two; 44, lifting part one; 51, rotary platform two; 52, unloading frame one; 53, unloading frame two; 61, base; 62, rotary arm; 63, clamping arm one; 64, vacuum suction cup fixture one; 71, linear motor module one; 72, suction cup fixture platform one; 73, linear motor module two; 74, suction cup fixture platform two; 81, line-scan camera; 82, lead screw transmission part; 83, linear motor module three; 84, linear coaxial light source one; 85, linear coaxial light source two; 91, linear motor module four; 92, clamping arm two; 93, vacuum suction cup fixture two; 101, flipping rod; 102, vacuum suction cup fixture three; 111, code scanner; 112, code scanner bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-3, this embodiment provides a technical solution: an automatic detection device for the appearance of a metal bipolar plate coating, including a box body 1, a controller is provided outside the box body 1, a detection system is provided inside the box body 1, and a box door one 12 and a box door two 13 are provided on the box body 1 for manual opening of feeding and discharging.

[0028] The detection system includes a marble platform 2. The marble platform 2 is divided into a left platform and a right platform, and the left platform is lower than the right platform. The left platform is close to the box door one 12 and the box door two 13, and is provided with a loading rotary platform 4 and an unloading rotary platform 5. The position of the loading rotary platform 4 corresponds to that of the box door one 12, and the position of the unloading rotary platform 5 corresponds to that of the box door two 13. In the middle of the side of the right platform close to the loading rotary platform 4 and the unloading rotary platform 5, there is a loading and unloading robotic arm 6. On both sides of the loading and unloading robotic arm 6, there are suction cup fixture assemblies 7, namely suction cup fixture assembly one and suction cup fixture assembly two respectively. The position of the suction cup fixture assembly one corresponds to that of the loading rotary platform 4, and the position of the suction cup fixture assembly two corresponds to that of the unloading rotary platform 5. The suction cup fixture assembly one and the suction cup fixture assembly two are parallel in position. In the middle of the right platform, there is a frame 3. The frame 3 is composed of a cross beam 31 and two columns 32. The two columns 32 are respectively located outside the suction cup fixture assembly one and the suction cup fixture assembly two. The cross beam 31 is perpendicular to the suction cup fixture assembly one and the suction cup fixture assembly two and is located above the suction cup fixture assembly one and the suction cup fixture assembly two. On the side of the cross beam 31 facing the loading and unloading robotic arm 6, there is a camera assembly 8, and on the other side, there is a robotic hand 9. In the middle of the side of the right platform where the robotic hand 9 is provided on the cross beam 31, there is a flipping mechanism 10.

[0029] The loading rotary platform 4 includes a rotary platform one 41, a loading frame one 42, a loading frame two 43, and a lifting part one 44. The loading frame one 42 and the loading frame two 43 are centrosymmetric along the center line of the rotary platform one 41 and are located above the rotary platform one 41. The lifting part one 44 is located below the rotary platform one 41.

[0030] The unloading rotary platform 5 includes a rotary platform two 51, an unloading frame one 52, an unloading frame two 53, and a lifting part two. The unloading frame one 52 and the unloading frame two 53 are centrosymmetric along the center line of the rotary platform two 51 and are located above the rotary platform two 51. The lifting part two is located below the rotary platform two 51.

[0031] Both the lifting part one 44 and the lifting part two include a lifting rod and a lifting platform, and the lifting function can be realized by adopting a pneumatic, hydraulic or mechanical transmission structure.

[0032] The loading frame one 42, the loading frame two 43, the unloading frame one 52, and the unloading frame two 53 are all used for placing materials. The materials are a number of metal bipolar plates and a number of partitions stacked alternately in sequence. A two-dimensional code or a bar code can be set on the metal bipolar plate. The lifting part one 44 is used for lifting the materials in the loading frame one 42 or the loading frame two 43, and the lifting part two is used for lifting the materials in the unloading frame one 52 or the unloading frame two 53.

[0033] The loading frame 1 - 42 is close to the box door 1 - 12, and the unloading frame 2 - 53 is close to the box door 2 - 13. Both the loading frame 1 - 42 and the loading frame 2 - 43 are provided with a first sensor and a second sensor, and both the unloading frame 1 - 52 and the unloading frame 2 - 53 are provided with a third sensor. The first sensor is used to sense whether there is material in the loading frame 1 - 42 or the loading frame 2 - 43, the second sensor is used to sense whether the first lifting part 4 - 4 reaches the initial loading position, and the third sensor is used to sense whether the second lifting part reaches the initial unloading position.

[0034] The loading and unloading robotic arm 6 includes a base 6 - 1, a rotating arm 6 - 2, a first clamping arm 6 - 3, and a first vacuum chuck fixture 6 - 4. One end of the rotating arm 6 - 2 is connected to the base 6 - 1 through a rotating shaft, and the other end is fixedly connected to the first clamping arm 6 - 3. A first cylinder is arranged inside the first clamping arm 6 - 3 and is connected to the first vacuum chuck fixture 6 - 4. The first vacuum chuck fixture 6 - 4 can move up and down through the movement of the cylinder.

[0035] The first suction cup fixture assembly includes a first linear motor module 7 - 1 and a first suction cup fixture platform 7 - 2 installed on the first linear motor module 7 - 1. The second suction cup fixture assembly includes a second linear motor module 7 - 3 and a second suction cup fixture platform 7 - 4 installed on the second linear motor module 7 - 3. Suction cup fixtures are provided on both the first suction cup fixture platform 7 - 2 and the second suction cup fixture platform 7 - 4, and a fourth sensor is provided on each suction cup fixture. When the fourth sensor senses that there is a metal bipolar plate on the suction cup fixture, the suction cup fixture sucks the metal bipolar plate flat.

[0036] The camera assembly 8 includes a third linear motor module 8 - 3 horizontally arranged on the cross beam 3 - 1. A lead screw transmission member 8 - 2 is vertically installed on the third linear motor module 8 - 3, and a line - scan camera 8 - 1 with a lens is installed on the lead screw transmission member 8 - 2. The line - scan camera 8 - 1 can move up and down through the movement of the lead screw transmission member 8 - 2. The line - scan camera 8 - 1 captures images of different parts of the object surface one by one in the direction of the object movement during the object movement.

[0037] Above the first suction cup fixture assembly, there is a first linear coaxial light source 8 - 4, and above the second suction cup fixture assembly, there is a second linear coaxial light source 8 - 5. The positions of the first linear coaxial light source 8 - 4 and the second linear coaxial light source 8 - 5 form a straight line parallel to the third linear motor module 8 - 3 and are directly below the moving position of the lens of the line - scan camera 8 - 1. Both the first linear coaxial light source 8 - 4 and the second linear coaxial light source 8 - 5 are linear coaxial light sources. The linear coaxial light source is a combination of a line light source and a coaxial light source, which retains the high brightness of the line light and obtains a better light - gathering effect through the coaxial semi - transparent and semi - reflective glass arranged inside.

[0038] The first linear coaxial light source 8 - 4 and the second linear coaxial light source 8 - 5 are used in cooperation with the line - scan camera 8 - 1 with a lens, enabling the line - scan camera 8 - 1 to obtain clearer images of the metal bipolar plate.

[0039] The manipulator 9 is provided with a linear motor module four 91, a clamping arm two 92 mounted on the linear motor module four 91, and a vacuum chuck fixture two 93. A cylinder two is arranged inside the clamping arm two 92 and is connected to the vacuum chuck fixture two 93. The vacuum chuck fixture two 93 moves up and down through the movement of the cylinder.

[0040] The flipping mechanism 10 includes a flipping rod 101, a vacuum chuck fixture three 102 mounted on the flipping rod 101, and an inductor five mounted on the vacuum chuck fixture three 102.

[0041] The linear motor module one 71, the linear motor module two 73, the linear motor module three 83, and the linear motor module four 91 are all linear motor modules. A linear motor module is a system composed of components such as a linear motor, a driver, an encoder, and a connecting rod. It is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism, and has the advantages of simple structure, convenient realization of long stroke, high acceleration, fast response, and high precision.

[0042] The vacuum chuck fixture one 64, the vacuum chuck fixture two 93, the vacuum chuck fixture three 102, and the suction cup jig all generate relative vacuum during operation by setting a vacuum pump, and utilize atmospheric pressure to adsorb the workpiece. There is no need for clamping, no clamping marks will be generated, the workpiece will be prevented from having pressed marks, and clamping scratches and bumps caused by improper operation will be avoided.

[0043] Spare trays 15 are provided on the outer side of the linear motor module one 71 near the loading rotary platform 4 and the flipping mechanism 10, and on the outer side of the linear motor module two 73 near the unloading rotary platform 5.

[0044] A code scanning mechanism 11 is provided on one side of the linear motor module one 71. The code scanning mechanism 11 includes a code scanner 111 and a code scanner support 112. The code scanner support 112 is fixed on the marble platform 2, and the code scanner 111 is mounted on the code scanner support 112 above the linear motor module one 71.

[0045] The controller is used to display, receive, and process the collected images of metal bipolar plates, including a computer and a PLC. The computer includes a display 14 and a host. The PLC is a programmable logic controller, which is electrically connected to the loading rotary platform 4, the unloading rotary platform 5, the loading and unloading robotic arm 6, the suction cup fixture assembly 7, the barcode scanning mechanism 11, the camera assembly 8, the linear coaxial light source, the robotic arm 9, and the flipping mechanism 10, and controls the movements of the loading rotary platform 4, the unloading rotary platform 5, the loading and unloading robotic arm 6, the suction cup fixture assembly 7, the barcode scanning mechanism 11, the camera assembly 8, the linear coaxial light source, the robotic arm 9, and the flipping mechanism 10. The host is electrically connected to the line scan camera 81, the barcode scanner 111, the PLC, and the display 14 respectively. The host includes inspection software and PLC operation software. The inspection software is used for image inspection, image display, and image storage, and can automatically identify various defects in the coating of metal bipolar plates. The PLC operation software can set the control programs for the PLC to control the loading rotary platform 4, the unloading rotary platform 5, the loading and unloading robotic arm 6, the suction cup fixture assembly 7, the barcode scanning mechanism 11, the linear coaxial light source, the camera assembly 8, the robotic arm 9, and the flipping mechanism 10. The display 14 displays the operations of the host on the inspection software and the operations of the host on the PLC operation software, facilitating the viewing of the images of the appearance inspection of each metal bipolar plate coating.

[0046] The box body 1 is also provided with a window near the spare material tray 15, and the operator can open the window to take out the materials in the spare material tray 15.

[0047] Working principle:

[0048] The operator runs the PLC operation software through the host, controls the movement of the lead screw transmission part 82 to drive the line scan camera 81 to move up and down, adjusts the width of the collected images of the line scan camera 81, and sets the number of metal bipolar plates.

[0049] The operator opens the first box door 12 and places the material on the first loading frame 42. The topmost one is the first metal bipolar plate. When the first sensor senses that there is material in the first loading frame 42, the first sensor outputs a signal and transmits it to the PLC. The loading rotating platform 4 rotates 180 degrees, rotating the first loading frame 42 above the first lifting part 44, and the second loading frame 43 approaches the first box door 12. The first lifting part 44 rises to lift the material in the first loading frame 42 until the second sensor senses that the first lifting part 44 reaches the initial loading position. The second sensor outputs a signal to the PLC, and the first lifting part 44 stops rising. The rotating arm 62 of the loading and unloading manipulator 6 rotates to move the first clamping arm 63 above the first loading frame 42. The first vacuum chuck fixture 64 descends to suck the first metal bipolar plate. The first vacuum chuck fixture 64 ascends. The rotating arm 62 of the loading and unloading manipulator 6 rotates to move the first clamping arm 63 above the first suction jig platform 72. The first vacuum chuck fixture 64 descends, and the first vacuum chuck fixture 64 breaks the vacuum to place the first metal bipolar plate on the suction jig. The first vacuum chuck fixture 64 ascends. At the same time, the first lifting part 44 lifts the material in the first loading frame 42 once, and the lifting distance can be set through the PLC operation software. At this time, the topmost material in the first loading frame 42 is the first separator. The second lifting part lifts the first unloading frame 52 to the initial unloading position.

[0050] The sensor four of the suction cup fixture senses the first metal bipolar plate and flattens it. The linear motor module three 83 moves the line scan camera 81 to the position of the linear coaxial light source one 84. The linear motor module one 71 transports the suction cup fixture platform one 72 from the left side under the barcode scanner 111 to the detection position set by the PLC, which is on the left side of the linear coaxial light source one 84. The barcode scanner 111 scans the QR code or barcode on the first metal bipolar plate and transmits the information to the host computer. The linear coaxial light source one 84 is turned on, and the line scan camera 81 starts taking pictures and transmits the image information to the host computer. The detection software processes the image information transmitted by the line scan camera 81 to the host computer. The linear motor module one 71 transports the suction cup fixture platform one 72 from the left side of the linear coaxial light source one 84 through the lower part to the right side to the position of the flipping mechanism 10. After the photographing is completed and the detection software finishes processing the information, an image of the first metal bipolar plate is formed, and the defects of the coating of the first metal bipolar plate are automatically analyzed according to the set detection scheme. It is detected whether there are defects such as coating layer peeling, scratches, coating bumps, coating depressions, and stains caused by unclean cleaning on the first metal bipolar plate. According to the detected defect categories, it is determined whether the coating appearance of the first metal bipolar plate is a qualified product or a non-conforming product, and the detection result of the coating appearance of the first metal bipolar plate is presented on the display 14. The host computer feeds back the information to the PLC to proceed with the next program. At the same time, the rotating arm 62 of the loading and unloading robotic arm 6 rotates, moves the clamping arm one 63 above the loading frame one 42, the vacuum suction cup fixture one 64 moves downward to suck the first partition plate in the loading frame one 42, the vacuum suction cup fixture one 64 moves upward, the rotating arm 62 of the loading and unloading robotic arm 6 rotates to move the clamping arm one 63 above the unloading frame one 52, the vacuum suction cup fixture one 64 moves downward, and the vacuum suction cup fixture one 64 breaks the vacuum and places the first partition plate into the unloading frame one 52. The vacuum suction cup fixture one 64 moves upward, and the lifting part two descends once from the initial position. The descending distance can be set through the PLC operation software. At this time, the material at the top of the loading frame one 42 is the second metal bipolar plate, and the lifting part one 44 lifts once.

[0051] The clamping arm two 92 of the manipulator 9 is moved above the sucker jig platform one 72 through the linear motor module four 91. The vacuum sucker fixture two 93 descends to suck the first metal bipolar plate on the sucker jig of the sucker jig platform one 72. The vacuum sucker fixture two 93 ascends, and the linear motor module one 71 transports the sucker jig platform one 72 back to the original position. According to the detection and judgment result, when the coating appearance of the first metal bipolar plate is judged as OK product, the linear motor module two 73 transports the sucker jig platform two 74 to the position of the flipping mechanism 10. The clamping arm two 92 moves the first metal bipolar plate above the vacuum sucker fixture three 102 through the linear motor module four 91. The vacuum sucker fixture two 93 descends to break the vacuum and places the first metal bipolar plate on the vacuum sucker fixture three 102. The inductor five senses the first metal bipolar plate, and the vacuum sucker fixture three 102 automatically adsorbs the first metal bipolar plate. The vacuum sucker fixture two 93 ascends, and the manipulator 9 returns to the original position. The flipping rod 101 flips 180 degrees and moves the first metal bipolar plate above the sucker jig platform two 74. The vacuum sucker fixture three 102 breaks the vacuum and places the first metal bipolar plate on the sucker jig of the sucker jig platform two 74. After the inductor four of the sucker jig senses the first metal bipolar plate, it automatically adsorbs and flattens it, and the flipping rod 101 flips back to the original position. When the coating appearance of the first metal bipolar plate is judged as NG product, the clamping arm two 92 moves the first metal bipolar plate above the spare tray 15 through the linear motor module four 91. The vacuum sucker fixture two 93 descends to break the vacuum and places the first metal bipolar plate into the spare tray 15 outside the linear motor module one 71 and near the flipping mechanism 10. The manipulator 9 returns to the original position. At the same time, the loading and unloading robotic arm 6 sucks the second metal bipolar plate in the loading frame one 42 and places the second metal bipolar plate on the sucker jig of the sucker jig platform one 72 that has returned to the original position to detect the coating appearance of the second metal bipolar plate.

[0052] After the appearance of the coating on the first metal bipolar plate is judged as a qualified product and placed on the suction cup fixture of the second suction cup fixture platform 74, the linear motor module two 73 transports the second suction cup fixture platform 74 from the right side to the detection position set by the PLC, which is on the right side of the linear coaxial light source two 85. The linear coaxial light source two 85 is turned on, and the line scan camera 81 starts taking pictures, transmitting the image information of the other side of the first metal bipolar plate to the host computer. The detection software processes the image information transmitted by the line scan camera 81 to the host computer. The linear motor module two 73 transports the second suction cup fixture platform 74 from the right side of the linear coaxial light source two 85, passes under it, and moves it to the left side of the linear motor module two 73. After the photographing is completed, the detection software finishes processing the image information to form an image of the other side of the first metal bipolar plate. The detection software automatically analyzes the defects of the coating on the image of the other side of the first metal bipolar plate according to the set detection scheme, and detects whether there are defects such as coating layer peeling, scratches, coating bumps, coating depressions, stains caused by unclean cleaning, etc. on the coating of the other side of the first metal bipolar plate. According to the detected defect category, it is judged whether the appearance of the coating on the first metal bipolar plate is a qualified product or a non-conforming product, and the detection result is presented on the display 14. The host computer feeds back the information to the PLC to proceed to the next program.

[0053] The rotating arm 62 of the loading and unloading robotic arm 6 moves the first clamping arm 63 above the second suction cup fixture platform 74. When it is judged that the appearance of the coating on the first metal bipolar plate is a non-conforming product, the vacuum suction cup fixture one 64 descends to suck the first metal bipolar plate, the vacuum suction cup fixture one 64 ascends, and the rotating arm 62 moves the first clamping arm 63 to the outside of the linear motor module two 73 and above the spare material tray 15 near the unloading rotating platform 5. The vacuum suction cup fixture one 64 descends to break the vacuum and places the first metal bipolar plate into the spare material tray 15, and the vacuum suction cup fixture one 64 ascends; when it is judged that the appearance of the coating on the first metal bipolar plate is a qualified product, the vacuum suction cup fixture one 64 descends to suck the first metal bipolar plate, the rotating arm 62 moves the first clamping arm 63 above the first unloading frame 52, the vacuum suction cup fixture one 64 descends to break the vacuum, sucks and places the first metal bipolar plate into the first unloading frame 52, stacks it on the first partition board, the vacuum suction cup fixture one 64 ascends, and the second lifting part descends once.

[0054] Until the number of metal bipolar plates stacked in the first unloading frame 52 reaches the quantity set by the PLC operating software, the unloading rotating platform 5 rotates 180 degrees, the first unloading frame 52 approaches the second box door 13, the second unloading frame 53 is located above the second lifting part, and the operator opens the second box door 13 to remove the materials in the first unloading frame 52. The second lifting part lifts the second unloading frame 53, and the third sensor senses that the second lifting part is at the initial unloading position. The third sensor outputs a signal and transmits it to the PLC, and the second lifting part stops lifting.

[0055] The operator opens the first box door 12 and puts the material into the second loading frame 43. The first sensor senses that there is material in the second loading frame 43. Until all the material in the first loading frame 42 is taken away by the loading and unloading robotic arm 6, the first sensor transmits a signal to the PLC. The first rotating platform 41 rotates 180 degrees, and the second loading frame 43 is located above the first lifting part 44. The first lifting part 44 lifts the second loading frame 43. The second sensor senses that the first lifting part 44 is at the initial loading position. The second sensor outputs a signal and transmits it to the PLC. The first lifting part 44 stops lifting. The loading and unloading robotic arm 6 sucks the first metal bipolar plate in the second loading frame 43 and conducts a detection on the coating appearance.

[0056] By setting the PLC operation software, control the movement of the loading rotating platform 4, the unloading rotating platform 5, the loading and unloading robotic arm 6, the suction cup fixture assembly 7, the code scanning mechanism 11, the linear coaxial light source, the camera assembly 8, the robotic hand 9 and the flipping mechanism 10. The detection software analyzes and detects the product, determines whether the coating appearance of the metal bipolar plate is a qualified product or a non - qualified product. The detection result is that the host outputs a signal to the PLC, realizing the automatic detection of the coating appearance of the metal bipolar plate.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic detection device for the appearance of a metal bipolar plate coating, comprising a box body (1), a controller is arranged outside the box body (1), and a detection system is arranged inside the box body (1), characterized in that, The detection system includes a marble platform (2), a loading rotary platform (4), an unloading rotary platform (5), a loading and unloading robotic arm (6), a suction cup fixture assembly (7), a code scanning mechanism (11), a linear coaxial light source, a frame (3), and a flipping mechanism (10) installed on the marble platform (2). Camera assemblies (8) and manipulators (9) are respectively arranged on both sides of the frame (3). A first box door (12) and a second box door (13) are provided on the box body (1).

2. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 1, wherein The position of the loading rotary platform (4) corresponds to that of the first box door (12). The loading rotary platform (4) includes a first rotary platform (41), a first loading frame (42), a second loading frame (43), and a first lifting part (44). The first loading frame (42) and the second loading frame (43) are centrosymmetric about the center of the first rotary platform (41) and are located above the first rotary platform (41). The first lifting part (44) is located below the first rotary platform (41). Both the first loading frame (42) and the second loading frame (43) are provided with a first sensor and a second sensor.

3. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 1, characterized in that, The position of the unloading rotary platform (5) corresponds to that of the second box door (13). The unloading rotary platform (5) includes a second rotary platform (51), a first unloading frame (52), a second unloading frame (53), and a second lifting part. The first unloading frame (52) and the second unloading frame (53) are centrosymmetric about the center of the second rotary platform (51) and are located above the second rotary platform (51). The second lifting part is located below the second rotary platform (51). Both the first unloading frame (52) and the second unloading frame (53) are provided with a third sensor.

4. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 1, wherein, The loading and unloading robotic arm (6) includes a base (61), a rotary arm (62) installed on the base (61), a first clamping arm (63) installed on the rotary arm (62), and a first vacuum suction cup fixture (64). A first cylinder is arranged inside the first clamping arm (63), and the first cylinder is connected to the first vacuum suction cup fixture (64).

5. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 1, wherein, The suction cup fixture assembly (7) includes a first suction cup fixture assembly and a second suction cup fixture assembly. The first suction cup fixture assembly and the second suction cup fixture assembly are parallel in position and are respectively located on both sides of the loading and unloading robotic arm (6). The position of the first suction cup fixture assembly corresponds to that of the loading rotary platform (4). The first suction cup fixture assembly includes a first linear motor module (71) and a first suction cup fixture platform (72) installed on the first linear motor module (71). The position of the second suction cup fixture assembly corresponds to that of the unloading rotary platform (5). The second suction cup fixture assembly includes a second linear motor module (73) and a second suction cup fixture platform (74) installed on the second linear motor module (73). Suction cup fixtures are provided on both the first suction cup fixture platform (72) and the second suction cup fixture platform (74), and a fourth sensor is provided on the suction cup fixture.

6. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 5, characterized in that, The code scanning mechanism (11) includes a code scanner (111) and a code scanner bracket (112). The code scanner bracket (112) is located on one side of the first linear motor module (71), and the code scanner (111) is installed on the code scanner bracket (112) above the first linear motor module (71).

7. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to claim 5, characterized in that The camera assembly (8) includes a third linear motor module (83) horizontally arranged on the frame (3). A lead screw transmission member (82) is vertically installed on the third linear motor module (83). A line scan camera (81) is installed on the lead screw transmission member (82), and a lens is provided on the line scan camera (81).

8. The automatic detection device for the appearance of the metal bipolar plate coating according to claim 7, characterized in that The linear coaxial light source includes a first linear coaxial light source (84) and a second linear coaxial light source (85). The first linear coaxial light source (84) is located above the first linear motor module (71), and the second linear coaxial light source (85) is located above the second linear motor module (73). The positions of the first linear coaxial light source (84) and the second linear coaxial light source (85) form a straight line parallel to the third linear motor module (83) and are directly below the moving position of the lens of the line scan camera (81).

9. The automatic detection device for the appearance of the metal bipolar plate coating according to claim 1, characterized in that, The manipulator (9) is provided with a fourth linear motor module (91), a second clamping arm (92) installed on the fourth linear motor module (91), and a second vacuum chuck fixture (93). A cylinder two is provided inside the second clamping arm (92), and the cylinder two is connected to the second vacuum chuck fixture (93). The flipping mechanism (10) includes a flipping rod (101), a third vacuum chuck fixture (102) installed on the flipping rod (101), and a fifth inductor installed on the third vacuum chuck fixture (102).

10. The automatic inspection equipment for the appearance of the metal bipolar plate coating according to any one of claims 1 to 9, characterized in that, The controller includes a computer and a PLC. The computer includes a display (14) and a host. The PLC is a programmable logic controller and is electrically connected to the loading rotating platform (4), the unloading rotating platform (5), the loading and unloading robotic arm (6), the suction cup jig assembly (7), the code scanning mechanism (11), the linear coaxial light source, the camera assembly (8), the manipulator (9), and the flipping mechanism (10). The host is electrically connected to the PLC, the display (14), the code scanning mechanism (11), and the camera assembly (8) respectively. The host includes detection software and PLC operation software.

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