AOI equipment suitable for full inspection of appearance of battery cell top cover

Abstract

The invention discloses battery cell top cover appearance full inspection AOI equipment which comprises a machine table, a rack is fixedly connected to the bottom face of the machine table, two empty disc carrying mechanisms are fixedly connected to one side of the top face of the machine table, a conveying line detection mechanism is arranged on the side, away from the empty disc carrying mechanisms, of the top face of the machine table, and a plurality of stock bin mechanisms are arranged on the top face of the machine table. A discharging sorting mechanism is arranged at the position, close to each stock bin mechanism, of the top face of the machine table, a discharging buffering conveying line mechanism is fixedly connected to the position, below the stock bin mechanisms, of the top face of the machine table, and a module feeding mechanism is fixedly connected to the end of the top face of the machine table. According to the system, a one-stop solution scheme of feeding and discharging carrying, detection, sorting, data processing and analysis and networking cooperative interactive operation is achieved, all faces of objects can be visually detected through cameras, the detected objects of different types are automatically conveyed into different stock bin mechanisms, manual participation is little, and the automation degree is high.

Description

Technical Field

[0001] The present invention relates to the technical field of AOI detection, and specifically to an AOI device suitable for full inspection of the appearance of the battery cell top cover. Background Art

[0002] The AOI device for full inspection of the appearance of the battery cell top cover plays a crucial role in the battery manufacturing process; with the continuous development of battery technology and the increasing automation of the battery manufacturing process, the quality inspection of the appearance of the battery cell top cover has become particularly important. Traditional manual inspection methods have problems such as strong subjectivity, low inspection efficiency, and insufficient accuracy, and are difficult to meet the production requirements of large scale and high efficiency. Therefore, AOI devices have emerged. AOI is automatic optical inspection, which uses machine vision technology for inspection. Machine vision is an important part of industrial automation. It realizes the automatic recognition, positioning, measurement, and inspection of objects by simulating the visual function of humans and using technologies such as image sensors, image processing, and pattern recognition. In the AOI device for full inspection of the appearance of the battery cell top cover, machine vision technology plays a key role. Using a high-resolution image sensor (such as a camera), an image of the battery cell top cover is collected. The collected image is preprocessed to improve the clarity and quality of the image. Subsequently, using technologies such as image segmentation and feature extraction, key feature information of the battery cell top cover is extracted. Based on the extracted feature information, algorithms such as machine learning and deep learning are used to classify and identify the battery cell top cover. These algorithms can accurately identify defects, foreign objects, and other abnormal conditions on the battery cell top cover and give corresponding inspection results; currently, AOI detection technology has become an important tool for inspecting the appearance of the battery cell top cover. AOI devices mainly achieve automatic detection based on optical imaging and image processing technologies. The AOI device for full inspection of the appearance of the battery cell top cover is an indispensable important tool in the battery manufacturing process. By adopting high-precision image recognition and analysis technologies, the AOI device can accurately and quickly detect defects on the surface of the battery cell top cover, improving production efficiency and quality reliability. However, the currently used AOI devices for full inspection of the appearance of the battery cell top cover have the following defects: When inspecting the battery cell top cover, it is necessary to perform image detection on each surface. When recording images of each surface, different fixing methods are required. Therefore, the currently used AOI devices for full inspection of the appearance of the battery cell top cover require manual participation, continuously placing the battery cell top cover on different conveying mechanisms to record images, and do not have the function of separating defective products on site. It is necessary to number the battery cell top covers, and later visually judge the defective products, and then add a sorting process to separate the defective products, with relatively low overall automation and high manual participation.

[0003] Therefore, we propose an AOI device suitable for full inspection of the appearance of the battery cell top cover to solve the above problems. Summary of the Invention

[0004] The object of the present invention is to provide an AOI device suitable for full inspection of the appearance of the battery cell top cover to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: An AOI device suitable for full inspection of the appearance of the battery cell top cover, including a machine table, the bottom surface of the machine table is fixedly connected to a machine frame, on one side of the top surface of the machine table, two empty tray handling mechanisms are fixedly connected, on the side of the top surface of the machine table away from the empty tray handling mechanism, a conveyor line detection mechanism is arranged, on the top surface of the machine table, a plurality of bin mechanisms are arranged, at a position close to each bin mechanism on the top surface of the machine table, a blanking sorting mechanism is arranged, at a position below the plurality of bin mechanisms on the top surface of the machine table, a blanking buffer conveyor line mechanism is fixedly connected, at the end of the top surface of the machine table, a module loading mechanism is fixedly connected, at a position close to the module loading mechanism on the top surface of the machine table, a loading buffer conveyor line mechanism is fixedly connected, at a position close to one end of the module loading mechanism on the top surface of the machine table, a module handling mechanism is fixedly connected, at a position between the module handling mechanism and the loading buffer conveyor line mechanism on the top surface of the machine table, a transfer conveyor line mechanism is fixedly connected, at a position close to the module loading mechanism on the top surface of the machine table, a robot handling and detection mechanism is arranged, and at one end of the top surface of the machine table away from the module loading mechanism, a linear motor handling mechanism is fixedly connected.

[0006] Preferably, the robot handling and detection mechanism includes a four-axis robot, the four-axis robot is fixedly connected to the top surface of the machine table, and a first vacuum chuck is fixedly connected to the output shaft of the four-axis robot.

[0007] Preferably, the blanking sorting mechanism includes a Y-axis linear motor, an X-axis linear motor and a precision linear guide rail. One end of the bottom surface of the X-axis linear motor is fixedly connected to the output end of the Y-axis linear motor. The Y-axis linear motor and the X-axis linear motor are perpendicular to each other. A sliding block is fixedly connected to the top surface of the output end of the X-axis linear motor. A Z-axis slide cylinder is fixedly connected to the side wall of the sliding block. A second vacuum chuck is fixedly connected to the bottom end of the output end of the Z-axis slide cylinder.

[0008] Preferably, the precision linear guide rail is parallel to the Y-axis linear motor. A slider is fixedly connected to the bottom surface of the X-axis linear motor away from the Y-axis linear motor. The slider is horizontally slidably connected to the top surface of the precision linear guide rail. Two legs are fixedly connected to the bottom surface of the Y-axis linear motor. The bottom ends of the legs are fixedly connected to the top surface of the machine table. Two support plates are fixedly connected to the bottom surface of the precision linear guide rail. The bottom surfaces of the support plates are fixedly connected to the top surface of the machine table.

[0009] Preferably, the conveyor line detection mechanism includes two detection conveyor lines. A plurality of support feet are fixedly connected to the side walls of the detection conveyor lines. The bottom ends of the support feet are fixedly connected to the top surface of the machine table. A detection object positioning mechanism is fixedly connected to the surface of the detection conveyor line. A driver is fixedly connected to the detection conveyor line. A plurality of side detection cameras are fixedly connected to the top surface of the machine table on both sides of the detection conveyor line. A front detection camera is fixedly connected to the top surface of the machine table above the detection conveyor line.

[0010] Preferably, the bin mechanism includes a base platform, the bottom surface of the base platform is fixedly connected to the top surface of the machine platform, two tray baffles are vertically fixedly connected to both sides of the base platform, a tray inlet and outlet conveyor line is fixedly connected to the top surface of the base platform, a gear-rack lifting structure is fixedly connected to the base platform between the two tray baffles, a tray positioning and dividing structure is fixedly connected to the outer side wall of the top surface of one of the tray baffles, and a plurality of tray sensors are fixedly inserted into the side wall of the tray baffle.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention realizes a one-stop solution for loading and unloading handling, detection, sorting, data processing and analysis, and networking collaborative interaction operation. Moreover, all sides of the object can be detected by camera vision, and different types of objects after detection are automatically conveyed to different bin mechanisms, with less manual participation and high automation. Description of the Drawings

[0012] Figure 1 Schematic diagrams of the main structure in the first and second embodiments of the present invention; Figure 2 Schematic diagrams of the structure at the robot handling and detection mechanism in the first and second embodiments of the present invention; Figure 3 Schematic diagrams of the structure at the blanking and sorting mechanism in the first and second embodiments of the present invention; Figure 4 Schematic diagrams of the structure at the conveyor line detection mechanism in the first and second embodiments of the present invention; Figure 5 Schematic diagrams of the structure at the bin mechanism in the first and second embodiments of the present invention; Figure 6 Front view schematic diagrams of the structure at the bin mechanism in the first and second embodiments of the present invention.

[0013] In the figure: 1. Machine; 2. Robot handling and detection mechanism; 3. Unloading and sorting mechanism; 4. Conveyor line detection mechanism; 5. Bin mechanism; 11. Module loading mechanism; 12. Loading and buffering conveyor line mechanism; 13. Transfer conveyor line mechanism; 14. Module handling mechanism; 15. Linear motor handling mechanism; 16. Unloading and buffering conveyor line mechanism; 17. Empty tray handling mechanism; 18. Frame; 19. Side detection camera; 110. Front detection camera; 21. Four-axis robot; 22. First vacuum suction Plate; 31. Y-axis linear motor; 32. X-axis linear motor; 33. Precision linear guide; 34. Sliding block; 35. Z-axis slide cylinder; 36. Second vacuum suction cup; 37. Sliding block; 38. Support leg; 39. Support plate; 41. Detection conveyor line; 42. Support foot; 43. Driver; 44. Detection object positioning mechanism; 51. Bottom platform; 52. Tray baffle; 53. Tray in and out conveyor line; 54. Gear rack lifting structure; 55. Tray positioning and sub-tray structure; 56. Tray sensor. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1:

[0015] See also Figure 1 The present invention provides a technical solution: an AOI device suitable for full appearance inspection of a cell top cover, comprising a machine platform 1, the bottom surface of the machine platform 1 is fixedly connected to a frame 18, one side of the top surface of the machine platform 1 is fixedly connected to two empty tray conveying mechanisms 17, a conveyor line detection mechanism 4 is arranged on the side of the top surface of the machine platform 1 away from the empty tray conveying mechanism 17, a plurality of bin mechanisms 5 are arranged on the top surface of the machine platform 1, a material unloading and sorting mechanism 3 is arranged on the top surface of the machine platform 1 near each bin mechanism 5, a material unloading and buffering conveyor line mechanism 16 is fixedly connected to the top surface of the machine platform 1 below the plurality of bin mechanisms 5, and a conveyor line detection mechanism 4 is arranged on the top surface of the machine platform 1 away from the empty tray conveying mechanism 17, and a plurality of material bin mechanisms 5 are arranged on the top surface of the machine platform 1. A module feeding mechanism 11 is fixedly connected to the end of the surface, a feeding buffer conveyor line mechanism 12 is fixedly connected to the top surface of the machine 1 near the module feeding mechanism 11, a module transporting mechanism 14 is fixedly connected to one end of the top surface of the machine 1 near the module feeding mechanism 11, a transfer conveyor line mechanism 13 is fixedly connected to the top surface of the machine 1 between the module transporting mechanism 14 and the feeding buffer conveyor line mechanism 12, a robot transport and detection mechanism 2 is arranged on the top surface of the machine 1 near the module feeding mechanism 11, and a linear motor transport mechanism 15 is fixedly connected to one end of the top surface of the machine 1 away from the module feeding mechanism 11. Embodiment 2:

[0016] See also Figures 1-6, which is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The robot handling and detection mechanism 2 includes a four-axis robot 21, which is fixedly connected to the top surface of the machine table 1. The output shaft of the four-axis robot 21 is fixedly connected to the first vacuum chuck 22. The robot handling and detection mechanism 2 is used to adsorb an object from the end of the feeding buffer conveyor mechanism 12, move it above the camera for bottom surface appearance detection, and then place it on the two transfer conveyor mechanisms 13 for transmission after the detection is completed. The blanking and sorting mechanism 3 includes a Y-axis linear motor 31, an X-axis linear motor 32, and a precision linear guide 33. One end of the bottom surface of the X-axis linear motor 32 is fixedly connected to the output end of the Y-axis linear motor 31. The Y-axis linear motor 31 and the X-axis linear motor 32 are perpendicular to each other. The top surface of the output end of the X-axis linear motor 32 is fixedly connected to a sliding block 34. The side wall of the sliding block 34 is fixedly connected to a Z-axis slide cylinder 35. The bottom end of the output end of the Z-axis slide cylinder 35 is fixedly connected to the second vacuum chuck 36. The blanking and sorting mechanism 3 takes the corresponding object from the corresponding position of the blanking buffer conveyor mechanism 16 and moves it into the tray cavity of the bin mechanism 5.

[0017] The precision linear guide 33 is parallel to the Y-axis linear motor 31. One end of the bottom surface of the X-axis linear motor 32 away from the Y-axis linear motor 31 is fixedly connected to a slider 37. The slider 37 is horizontally slidably connected to the top surface of the precision linear guide 33. The bottom surface of the Y-axis linear motor 31 is fixedly connected to two legs 38. The bottom ends of the legs 38 are fixedly connected to the top surface of the machine table 1. The bottom surface of the precision linear guide 33 is fixedly connected to two support plates 39. The bottom surfaces of the support plates 39 are fixedly connected to the top surface of the machine table 1.

[0018] The conveyor line detection mechanism 4 includes two detection conveyor lines 41. The side walls of the detection conveyor lines 41 are fixedly connected to a plurality of support feet 42. The bottom ends of the support feet 42 are fixedly connected to the top surface of the machine table 1. The surface of the detection conveyor line 41 is fixedly connected with a detection object positioning mechanism 44. A driver 43 is fixedly connected to the detection conveyor line 41. A plurality of side detection cameras 19 are fixedly connected to the top surface of the machine table 1 on both sides of the detection conveyor line 41. A front detection camera 110 is fixedly connected to the top surface of the machine table 1 above the detection conveyor line 41. The module handling mechanism 14 takes two objects at a time and places them on the detection conveyor line 41 in the conveyor line detection mechanism 4. The objects are intermittently transmitted and moved at equal intervals on the detection conveyor line 41, and the front and side appearances are detected by the side detection cameras 19 and the front detection camera 110.

[0019] The silo mechanism 5 includes a base 51, the bottom surface of the base 51 is fixedly connected to the top surface of the machine table 1, two tray baffles 52 are vertically fixedly connected to both sides of the base 51, a tray inlet and outlet conveyor line 53 is fixedly connected to the top surface of the base 51, a gear-rack lifting structure 54 is fixedly connected to the base 51 between the two tray baffles 52, a tray positioning and dividing structure 55 is fixedly connected to the outer side wall of the top surface of one of the tray baffles 52, and a plurality of tray sensors 56 are fixedly inserted into the side wall of the tray baffle 52. After the tray is filled with objects, it will drop by the height of one tray. The empty tray handling mechanism 17 moves an empty tray from the empty tray bin and stacks it on top of the silo mechanism 5 to continue loading materials. When stacked to a fixed height, the whole stack of full trays drops onto the tray inlet and outlet conveyor line 53 and flows out, and is taken away manually or by an AGV. Embodiment 3:

[0020] Please refer to Figures 1-6 , which is the third embodiment of the present invention. Based on the above two embodiments, when the present invention is in use, the object to be detected is placed on the feeding buffer conveyor line mechanism 12, and there is no obstruction directly above the object. The four-axis robot 21 picks up 4 objects and passes through the camera to detect the appearance defects of the bottom surface, and then places them on the two transfer conveyor line mechanisms 13. The module handling mechanism 14 picks up two objects at a time and places them on the detection conveyor line 41. The front detection camera 110 and the side detection camera 19 are respectively fixed above and on both sides of the detection conveyor line 41. The object to be detected is intermittently transmitted and moved at equal intervals on the detection conveyor line 41. After all the side and front items of the object to be detected are detected on the detection conveyor line 41, after being positioned at the end position of the detection conveyor line 41, the linear motor handling mechanism 15 transports the object to be detected to the discharging buffer conveyor line mechanism 16. The discharging and sorting mechanism 3 places the objects to be detected into the trays on the corresponding silo mechanism 5 respectively. When the objects are stacked to a certain number, they will drop by the height of one tray. The empty tray handling mechanism 17 moves an empty tray from the empty tray bin and stacks it on top of the silo mechanism 5 to continue loading materials. After being stacked to a fixed height, the whole stack of trays flows out through the tray inlet and outlet conveyor line 53 to complete the appearance detection, and this cycle of actions is repeated to check a single object. The present invention realizes a one-stop solution for loading, unloading, handling, detection, sorting, data processing and analysis, and networked collaborative interaction operations. Moreover, all sides of the object can be detected by camera vision, and the detected objects of different categories are automatically transported to different silo mechanisms 5 with less manual participation and high automation.

[0021] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An AOI device suitable for full appearance inspection of a battery cell top cover, comprising a machine platform (1), wherein the bottom surface of the machine platform (1) is fixedly connected to a frame (18), and characterized in that: Two empty tray transport mechanisms (17) are fixedly connected to one side of the top surface of the machine (1); a conveyor line detection mechanism (4) is arranged on the side of the top surface of the machine (1) away from the empty tray transport mechanism (17); a plurality of silo mechanisms (5) are arranged on the top surface of the machine (1); a material unloading and sorting mechanism (3) is arranged near each silo mechanism (5) on the top surface of the machine (1); a material unloading and buffering conveyor line mechanism (16) is fixedly connected to the top surface of the machine (1) at a position below the plurality of silo mechanisms (5); a module loading mechanism (11) is fixedly connected to the end of the top surface of the machine (1); and a plurality of material unloading and buffering mechanisms (16) are fixedly connected to the top surface of the machine (1); and a plurality of material unloading and buffering mechanisms (11) are fixedly connected to the top surface of the machine (1). A loading buffer conveyor line mechanism (12) is fixedly connected near the module loading mechanism (11); a module transport mechanism (14) is fixedly connected to the top surface of the machine (1) near one end of the module loading mechanism (11); a transfer conveyor line mechanism (13) is fixedly connected to the top surface of the machine (1) between the module transport mechanism (14) and the loading buffer conveyor line mechanism (12); a robot transport detection mechanism (2) is arranged near the top surface of the machine (1) near the module loading mechanism (11); and a linear motor transport mechanism (15) is fixedly connected to the top surface of the machine (1) away from one end of the module loading mechanism (11).

2. The AOI equipment for full appearance inspection of battery top cover according to claim 1, characterized in that: The robot handling and detection mechanism (2) comprises a four-axis robot (21), the four-axis robot (21) being fixedly connected to the top surface of the machine platform (1), and the output shaft of the four-axis robot (21) being fixedly connected to a first vacuum suction cup (22).

3. The AOI equipment for full appearance inspection of battery top cover according to claim 1, characterized in that: The material unloading and sorting mechanism (3) comprises a Y-axis linear motor (31), an X-axis linear motor (32) and a precision linear guide rail (33); one end of the bottom surface of the X-axis linear motor (32) is fixedly connected to the output end of the Y-axis linear motor (31); the Y-axis linear motor (31) and the X-axis linear motor (32) are perpendicular to each other; the top surface of the output end of the X-axis linear motor (32) is fixedly connected to a sliding block (34); the side wall of the sliding block (34) is fixedly connected to a Z-axis slide cylinder (35); and the bottom end of the output end of the Z-axis slide cylinder (35) is fixedly connected to a second vacuum suction cup (36).

4. The AOI equipment for full appearance inspection of battery top cover according to claim 3, characterized in that: The precision linear guide (33) and the Y-axis linear motor (31) are parallel to each other; the bottom surface of one end of the X-axis linear motor (32) away from the Y-axis linear motor (31) is fixedly connected to a slider (37); the slider (37) is horizontally slidably connected to the top surface of the precision linear guide (33); the bottom surface of the Y-axis linear motor (31) is fixedly connected to two legs (38); the bottom ends of the legs (38) are fixedly connected to the top surface of the machine platform (1); the bottom surface of the precision linear guide (33) is fixedly connected to two support plates (39); the bottom surfaces of the support plates (39) are fixedly connected to the top surface of the machine platform (1).

5. The AOI equipment for full appearance inspection of battery top cover according to claim 1, characterized in that: The conveyor line detection mechanism (4) comprises two detection conveyor lines (41), the side walls of the detection conveyor lines (41) are fixedly connected to a plurality of support legs (42), the bottom ends of the support legs (42) are fixedly connected to the top surface of the machine platform (1), the surface of the detection conveyor lines (41) is fixedly connected to a detection object positioning mechanism (44), the detection conveyor lines (41) are fixedly connected to a driver (43), the top surface of the machine platform (1) is located on both sides of the detection conveyor lines (41) and is fixedly connected to a plurality of side detection cameras (19), and the top surface of the machine platform (1) is located above the detection conveyor lines (41) and is fixedly connected to a front detection camera (110).

6. The AOI equipment for full appearance inspection of battery top cover according to claim 1, characterized in that: The silo mechanism (5) comprises a base (51), the bottom surface of the base (51) is fixedly connected to the top surface of the machine platform (1), two tray baffles (52) are vertically fixedly connected to the two sides of the base (51), the top surface of the base (51) is fixedly connected to a tray inlet and outlet conveyor line (53), the base (51) is located between the two tray baffles (52) and is fixedly connected to a gear rack lifting structure (54), the outer wall of the top surface of one of the tray baffles (52) is fixedly connected to a tray positioning and dividing structure (55), and a plurality of tray sensors (56) are fixedly connected to the side walls of the tray baffles (52).

Images