A cylindrical hollow shell inspection device

Abstract

The application discloses a cylindrical hollow shell detection device, and relates to the technical field of detection equipment; the device comprises a detection station, a conveying part and a rejection mechanism; the detection station can detect the cylindrical hollow shell; the conveying part can convey the cylindrical hollow shell to be detected to the detection station and convey the qualified products after detection to a qualified product area; and the rejection mechanism is located at the end of the detection station and can reject the unqualified products to the collecting baskets on both sides. The cylindrical hollow shell detection device provided by the application can realize automatic and comprehensive detection, the detection result is accurate, and the unqualified products can be rejected.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a cylindrical hollow shell testing device. Background Technology

[0002] As an external component of the battery, the battery casing requires a high degree of surface smoothness during manufacturing, free from dents, scratches, and other defects. Therefore, after production, its appearance often needs to be inspected to meet production requirements. However, current inspection methods for battery casings often rely on manual sampling. Manual inspection is slow, and at high production speeds, it can only be done by sampling, resulting in low efficiency. Manual inspection is prone to errors, leading to inaccurate results. Extensive manual quality control inspection also increases operating costs for enterprises. Products with poor surface quality, such as scratches, dirt, dents, bulges, cracks, rust, deformed openings, damage, and carbon buildup, if not promptly removed, will cause numerous adverse effects when they reach users. Summary of the Invention

[0003] The purpose of this invention is to provide a cylindrical hollow shell detection device to solve the problems existing in the prior art, which can realize automatic and comprehensive detection, accurate detection results, and the ability to reject unqualified products.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a cylindrical hollow shell inspection device, comprising an inspection station capable of inspecting cylindrical hollow shells; a conveying unit capable of conveying the cylindrical hollow shells to be inspected to the inspection station and conveying qualified products to a qualified product area; and a rejection mechanism located at the end of the inspection station capable of rejecting detected defective products into collection baskets on both sides. In operation, the cylindrical hollow shells to be inspected enter the inspection station via the conveying unit and undergo comprehensive inspection. After inspection, qualified and defective products are classified and rejected. Qualified products continue to be conveyed via the conveying unit; defective products are rejected into collection baskets. The rejection of defective products can be based on the severity of defects such as scratches, deformation, and dents. Severely defective products are rejected into one collection basket for direct scrapping, while slightly defective products that can be repaired are rejected into another collection basket for unified repair processing.

[0006] Optionally, the inspection station includes a first inspection station, which comprises a first array station, a second array station, a third array station, and a fourth array station respectively located on both sides of the conveying section. Each of the first, second, and third array stations includes a station support frame, on which a camera and a light source are mounted. The positions of the camera and light source are adjustable. The first inspection station can inspect the bottom outer surface, opening, inner bottom surface, and inner wall of the battery casing. The fourth array station includes a station support frame, on which an adjusting rod is installed. The adjusting rod is equipped with a camera and a light source. The positions and angles of the camera and light source at the fourth array station are adjustable. Each station, based on different inspection positions and requirements, is equipped with different cameras, lenses, and light sources to achieve the best image capture effect. Various adjustment ranges are reserved according to actual conditions, such as overall left-right, front-back, and height adjustments, and separate front-back adjustments for the camera and light source. Some stations also reserve adjustment ranges for angle and height adjustments for their light sources. This allows the area array inspection at the testing station to be fully adaptable to different on-site working conditions. Multi-station, multi-angle supplementary lighting, and multi-camera acquisition enable better comprehensive inspection and data collection of our product casing.

[0007] Optionally, the conveying unit includes a detection conveying device and an outlet conveying device, with the first detection station located on both sides of the detection conveying device; a rotating wheel mechanism is provided between the detection conveying device and the outlet conveying device, capable of rotating the cylindrical hollow shell 360°; a second detection station is provided above the rotating wheel mechanism, the second detection station including a first line scan camera station, a second line scan camera station, a third line scan camera station, and a fourth line scan camera station with adjustable height, each equipped with a line scan camera; using line scan cameras allows for more precise and clearer detection. The system can clearly acquire image data of the outer surface of the battery casing, enabling better analysis of product data within the system. Multi-station, multi-angle supplementary lighting and multi-line scanning camera acquisition allow for comprehensive inspection and data collection of the product casing. The angle of the line scanning camera at the first line scanning camera station is adjustable. To achieve optimal image acquisition, line scanning cameras and light sources are arranged separately, with various adjustment ranges reserved according to actual conditions. These include overall left-right, front-back, and height adjustments, as well as separate front-back and light source adjustments. Some stations also have reserved angle and height adjustment ranges for the light source, allowing the area array inspection at the testing station to be fully adaptable to different on-site conditions.

[0008] Optionally, the rotating wheel mechanism includes a base plate located between the detection conveying device and the outlet conveying device. Support legs are installed at the bottom of the base plate, and rotating wheel mounting plates are fixedly installed on both sides of the top of the base plate. Three rotating shafts are movably arranged sequentially between the two rotating wheel mounting plates. Each of the three rotating shafts has a rotating wheel fixedly installed on it. One end of each of the two rotating shafts at the two ends passes through the rotating wheel mounting plate and is fixedly fitted with a synchronous pulley. One end of the rotating shaft in the middle passes through the rotating wheel mounting plate and is fitted with two synchronous pulleys. The two synchronous pulleys in the middle are connected to the synchronous pulleys at the two ends via synchronous transmission belts. A servo motor is connected to the end of one of the rotating shafts furthest from the synchronous pulleys. Grooves arranged axially are formed on the outer edge of each rotating wheel. A strong magnet is installed below each groove, capable of attracting and fixing a cylindrical hollow shell. A strong magnet bracket is installed between each pair of adjacent rotating wheels. An inclined guide plate is provided at the end of the base plate near the outlet conveying device.

[0009] Optionally, the detection conveying device includes a conveying profile with conveying legs at the bottom. A driven wheel is mounted on one end of the conveying profile via a driven end fixing plate, and a driving wheel is mounted on the other end of the conveying profile via a driving end fixing plate. The driving wheel and the driven wheel are connected by a closed belt drive. A servo motor is driven to one end of the driving wheel. A pad is provided between the upper surface of the conveying profile and the belt. The pad has a groove with a width greater than the width of the belt to limit the left and right swaying of the belt and reduce the friction between the belt and the contact surface.

[0010] Optionally, the outlet conveying device includes a conveying profile with conveying legs at its bottom. A driven wheel is mounted on one end of the conveying profile via a driven end fixing plate, and a driving wheel is mounted on the other end of the conveying profile via a driving end fixing plate. The driving wheel and the driven wheel are connected by a closed belt drive. A servo motor is connected to one end of the driving wheel via a drive shaft drive. A pad is provided between the upper surface of the conveying profile and the belt, and the pad has a groove with a groove width greater than the belt width. A conveying guide plate is fixed on the driven end fixing plate, and two conveying guide plates are symmetrically arranged on both sides of the belt. An air blowing port is provided on the side wall of the conveying profile, and the air blowing port is located on one side of the belt.

[0011] Optionally, the belt has a double-layer structure. The lower layer of the belt is a synchronous belt with the same tooth profile as the driving and driven pulleys. The upper layer of the belt is a red rubber layer with grooves spaced on its surface. These grooves are used to fix and drive the cylindrical hollow shell to move.

[0012] Optionally, the belt is an integrally formed structure, the inner side of the belt is a synchronous belt layer, the tooth shape of the synchronous belt layer is the same as the tooth shape of the driving wheel and the driven wheel, and the outer side of the belt is integrally formed with a baffle, which is used to fix and drive the cylindrical hollow shell to move between two adjacent baffles.

[0013] Optionally, the conveying section is provided with alignment mechanisms on both sides near the testing station; the alignment mechanism includes a guide plate support fixedly mounted on one side of the conveying section, and an alignment mechanism guide plate is installed on the top of the guide plate support. An adjustment plate is provided on the other side of the conveying section, and a support profile is fixedly mounted on the adjustment plate. A horizontally arranged cylinder is installed on the inner side of the top of the support profile through a cylinder fixing plate. A push plate is connected to the end of the cylinder through an adapter block. Both ends of the push plate and the alignment mechanism guide plate near the conveying section are respectively provided with chamfers, which can guide the battery shell with excessive offset and prevent the battery shell from directly hitting the side of the guide plate or push plate and being damaged or knocked away from the testing conveyor.

[0014] Optionally, the outlet conveying device is provided with a rejection mechanism and a demagnetizing mechanism in sequence. The rejection mechanism includes a main support leg and an auxiliary support leg fixedly mounted on both sides of the outlet conveying device. A rejection mechanism servo motor is mounted on the top of the main support leg, and the servo motor is driven by a drive shaft. The end of the drive shaft away from the servo motor is connected to the top of the auxiliary support leg. A rejection mechanism wheel is fixedly mounted on the drive shaft. An axial groove is formed on the side wall of the wheel, and a strong magnet is placed in the groove. A guard plate fixing plate is provided above the wheel. One end of the guard plate fixing plate is fixedly connected to the top side of the main support leg. Arc-shaped housing guard plates are installed on both the front and rear sides of the guard plate fixing plate. The housing guard plates are located outside the wheel. An inclined housing guide plate is provided below the housing guard plate. The bottom of the housing guide plate is fixed to the outlet conveying device via a guide plate fixing leg. On one side of the conveying device, a collection basket is placed below the housing guide plate, and collection baskets are placed at both ends of the rejection mechanism to store defective products. Defective products can be rejected separately according to the different degrees of defects such as scratches, deformation, and dents. Severely defective products are rejected into the collection basket for direct scrapping, while slightly defective products that can be repaired are rejected into another collection basket for unified repair processing. The top of the auxiliary support leg is equipped with a rejection air port through an air blowing fixing plate. The rejection air port is connected to a solenoid valve, which is mainly used to control the air blowing on the product, blowing the housing product to the other end of the turntable for easy rejection into the collection basket. There are two air ports on the conveyor belt below the rejection mechanism turntable, one at each end of the housing. The auxiliary rejection mechanism magnetically attracts the defective products into the groove of the rejection mechanism turntable. The demagnetizing mechanism includes a demagnetizing support fixed on one side of the outlet conveying device. A height-adjustable demagnetizing machine bracket is installed on the demagnetizing support, and the demagnetizing machine main unit is installed at the bottom of the demagnetizing machine bracket.

[0015] The present invention achieves the following technical effects compared to the prior art:

[0016] This invention features a specially designed supplementary lighting method, finding the most suitable method for this project's inspection. This method effectively highlights the characteristics of each part of the battery casing, resulting in more stable images for visual analysis. The entire inspection system achieves low false positive and low false rejection rates, high efficiency, and a superior user experience. The overall inspection speed is less limited, allowing adjustment of the equipment's operating speed based on the customer's actual production speed. It can meet customer needs in both high-speed and low-speed production, maintaining stable and good inspection results even with multiple stations operating simultaneously. When the battery casing enters the equipment, it only needs to ensure the opening is facing upwards and without significant deformation. The equipment automatically inspects the images obtained from each inspection station, achieving full inspection and classification of all battery casings. This solves the quality problems of battery casings leaving the factory caused by manual inspection, resolving issues such as high return rates and high complaint rates for customers, and avoiding reputational and financial losses due to returns and complaints. Battery casings inspected by this machine have more reliable factory quality. This invention boasts an extremely low error rate. Compared to the instability of manual quality control, the data obtained is more accurate and reliable, saving significant manual labor and substantially reducing enterprise operating costs. This invention offers rich customization capabilities. Based on product differences and varying testing requirements, the equipment can be modified in various ways to suit different diameters, heights, wall thicknesses, and required testing areas of the product being tested, meeting diverse on-site needs. The equipment is simple to operate, making it easy for customers to use. This invention can store product data for one month, one year, or even longer, and perform detailed analysis to assist customers in product quality management and statistical data collection. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the cylindrical hollow shell detection device of the present invention;

[0019] Figure 2 This is a front view of the internal structure of the cylindrical hollow shell detection device of the present invention;

[0020] Figure 3 This is a top view of the internal structure of the cylindrical hollow shell detection device of the present invention;

[0021] Figure 4 This is a schematic diagram of the detection and conveying device of the present invention;

[0022] Figure 5This is a schematic diagram of the alignment mechanism of the present invention;

[0023] Figure 6 This is a schematic diagram of the first detection station structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the first array workstation of the present invention;

[0025] Figure 8 This is a schematic diagram of the second array workstation of the present invention;

[0026] Figure 9 This is a schematic diagram of the third array workstation of the present invention;

[0027] Figure 10 This is a schematic diagram of the fourth array workstation of the present invention;

[0028] Figure 11 This is a schematic diagram of the rotary wheel mechanism of the present invention;

[0029] Figure 12 This is a schematic diagram of the second detection station of the present invention;

[0030] Figure 13 This is a schematic diagram of the first line scan camera station of the present invention;

[0031] Figure 14 This is a schematic diagram of the second line scanning camera station of the present invention;

[0032] Figure 15 This is a schematic diagram of the third line scanning camera station of the present invention;

[0033] Figure 16 This is a schematic diagram of the fourth line scanning camera station of the present invention;

[0034] Figure 17 This is a schematic diagram of the outlet conveying device of the present invention;

[0035] Figure 18 This is a schematic diagram of the rejection mechanism of the present invention;

[0036] Figure 19 This is a schematic diagram of the demagnetizing mechanism of the present invention;

[0037] Explanation of reference numerals in the attached drawings: 1-Detection conveyor; 2-Alignment mechanism; 3-First detection station; 4-Rotating wheel mechanism; 5-Second detection station; 6-Outlet conveyor; 7-Rejection mechanism; 8-Demagnetization mechanism; 9-Box; 10-Driven wheel; 11-Driven end fixing plate; 12-Conveyor support leg; 13-Belt; 14-Conveyor profile; 15-Padded plate; 16-Active end fixing plate; 17-Drive shaft; 18-Servo motor; 19-Connector 20-Servo motor mounting plate; 21-Alignment mechanism guide plate; 22-Guide plate support; 23-Push plate; 24-Adapter block; 25-Cylinder; 26-Cylinder mounting plate; 27-Support profile; 28-Adjusting plate; 29-First array station; 30-Second array station; 31-Third array station; 32-Fourth array station; 33-Leg; 34-Base plate; 35-First rotating wheel; 36-Third rotating shaft; 37-Synchronous pulley 38-Roller fixing plate; 39-Synchronous transmission belt; 40-Tensioning mechanism; 41-Second rotating shaft; 42-Second rotating wheel; 43-First rotating shaft; 44-Third rotating wheel; 45-Guide plate; 46-Motor fixing plate; 47-First line scan camera station; 48-Second line scan camera station; 49-Third line scan camera station; 50-Fourth line scan camera station; 51-Conveyor guide plate; 52-Air blowing port; 53-Main support leg of rejection mechanism; 5 4-Rejection mechanism servo motor; 55-Guard plate fixing plate; 56-Collection basket; 57-Rejection air blowing port; 58-Solenoid valve; 59-Air blowing fixing plate; 60-Rejection mechanism drive shaft; 61-Bearing seat; 62-Bearing fixing plate; 63-Auxiliary support leg; 64-Rejection mechanism rotating wheel; 65-Strong magnet; 66-Housing guard plate; 67-Housing guide plate; 68-Guide plate fixing support leg; 69-Demagnetizer main unit; 70-Demagnetizer bracket. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] The purpose of this invention is to provide a cylindrical hollow shell detection device to solve the problems existing in the prior art, which can realize automatic and comprehensive detection, accurate detection results, and the ability to reject unqualified products.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] This invention provides a cylindrical hollow shell detection device, see attached drawing. Figure 1 Appendix Figure 2 and attached Figure 3 As shown, it includes a detection station, an alignment mechanism 2, a conveying section, a rotary wheel mechanism 4, a rejection mechanism 7, and a demagnetizing mechanism 8, all mounted on the housing 9. Specifically, the conveying section includes a detection conveying device 1 and an outlet conveying device 6, such as... Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the testing station includes a first testing station 3, which is located on both sides of the testing and conveying device 1. The first testing station 3 includes a first array station 29, a second array station 30, a third array station 31, and a fourth array station 32, respectively located on both sides of the conveying section. Each of the first array station 29, second array station 30, and third array station 31 includes a station support frame, on which a camera and a light source are mounted. The positions of the camera and light source are adjustable. The first testing station 3 can test the bottom outer surface, opening, and inner bottom surface of the battery casing. The inner wall and other parts are inspected; the fourth array station includes a station support frame with an adjustment rod installed on it. The adjustment rod has a camera and a light source. The position and angle of the camera and light source on the fourth array station 32 are adjustable. Each station is equipped with different cameras, lenses, and light sources to achieve the best image acquisition effect, based on different inspection positions and requirements. Various adjustment ranges are reserved according to actual conditions, such as overall left-right, front-back, and height adjustments, and separate front-back and rear-back adjustments for the camera and light source. Some stations also have reserved angle and height adjustment ranges for the light source. This allows the array inspection of the inspection station to be fully adaptable to different on-site conditions. Multi-station, multi-angle supplementary lighting, and multi-camera acquisition enable better comprehensive inspection and data collection of our product shell. A rotating mechanism is provided between the inspection conveyor and the outlet conveyor. The rotating mechanism can rotate the cylindrical hollow shell 360°; a second inspection station 5 is located above the rotating mechanism 4. Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16As shown, the second inspection station 5 includes a first line scan camera station 47, a second line scan camera station 48, a third line scan camera station 49, and a fourth line scan camera station 50, all with adjustable height. Line scan cameras are installed on each of these stations. Using line scan cameras allows for more accurate and clearer acquisition of image data of the battery casing's outer surface, enabling better analysis of product data within the system. Multi-station, multi-angle supplementary lighting and multi-line scan camera acquisition enable comprehensive inspection and data collection of the product casing. The angle of the line scan camera on the first line scan camera station 47 is adjustable. To achieve optimal image acquisition, line scan cameras and light sources are arranged separately, with various adjustment ranges reserved according to actual conditions. These include overall left-right, front-back, and height adjustments, as well as separate front-back adjustments for the camera and light source. Some stations also have reserved angle and height adjustment ranges for the light source, allowing the area array inspection at the inspection station to be fully adaptable to different on-site conditions.

[0042] In operation, the product is conveyed on the inspection conveyor. First, it passes through the alignment mechanism 2, which tidies up the battery casings on the conveyor belt for inspection. Then, it passes through the first inspection station 3, where the outer surface, opening, inner bottom surface, and inner wall of the battery casing are inspected. After inspection, it enters the rotating wheel mechanism 4, where the battery casing is sequentially transferred on three rotating wheels. After the casing has been transferred on the three wheels, its outer surface is presented 360° to the inspection station for easy inspection. The exit of the rotating wheel mechanism 4 has a casing limiter to prevent misalignment of the casing during transport. Directly above the rotating wheel mechanism is the second inspection station 5, which is equipped entirely with line scanning cameras. As the battery casing rotates with the rotating wheel mechanism, the second inspection station 5 provides multi-directional and multi-angle supplementary lighting, and multiple line scanning cameras collect images separately. The line scanning cameras can more accurately and clearly collect image data of the outer surface of the battery casing, enabling better analysis of product data in the system. The multi-directional scanning by multiple line scanning cameras can collect images of the casing from all directions. (Due to the slightly longer time required for inspection at this line scanning station, to avoid affecting inspection efficiency, the line scanning section simultaneously inspects eight battery casings per scan.) After inspection, the casings enter the exit conveyor 6. The rejection mechanism 7 is a magnetic rotary rejection system. Defective products are rejected based on the severity of defects such as scratches, deformation, and dents. Severely defective products are placed in a collection basket for direct scrapping, while slightly defective products that can be repaired are placed in another collection basket for unified repair. Qualified products continue to be conveyed. The exit conveyor 6 is equipped with a demagnetizing mechanism 8, which demagnetizes good battery casings during transport. Thus, the battery casings that have passed through the first inspection station 3 and the second inspection station 5 have undergone image capture by multiple line scanning cameras and software inspection. Each battery casing has undergone comprehensive inspection of both its inner and outer surfaces, achieving the standard of full inspection, and defective products have been rejected. All battery casings that have passed the inspection and conveying process have met the inspection standards.

[0043] Further preferred, such as Figure 4As shown, the detection conveying device 1 includes a conveying profile 14. The bottom of the conveying profile 14 is provided with a conveying support leg 12 for supporting the detection conveying and adjusting the height of the detection conveying. One end of the conveying profile 14 is equipped with a driven wheel 10 through a driven end fixing plate 11, and the other end of the conveying profile 14 is equipped with a driving wheel through a driving end fixing plate 16. The driving wheel and the driven wheel are connected by a closed belt drive. The driven end fixing plate 11 is used to fix the driven wheel on the conveying profile 14 and tension the belt 13. The driven pulley is a synchronous pulley used for the operation of belt 13. One end of the driving pulley is connected to a servo motor 18 of the conveying device via a drive shaft 17 and coupling 19. The servo motor 18 is mounted on one end of the driving pulley via a servo motor mounting plate 20. The servo motor 18 provides power to the belt 13, precisely controls the belt speed and performs point braking, and provides monitoring electrical signals for triggering detection and rejection. A pad 15, made of ultra-high molecular weight polyethylene, is provided between the upper surface of the conveyor profile and the belt. The pad 15 has grooves, the width of which is greater than the width of the belt, to limit the left-right swaying of the belt and reduce the friction between the belt and the contact surface. The outlet conveying device 6 has a similar structure to the detection conveying device 1, such as... Figure 17 As shown, the difference lies in that the driven end fixing plate 11 of the outlet conveyor device 6 is fixedly provided with a conveyor guide plate 51. Two conveyor guide plates 51 are symmetrically arranged on both sides of the belt, mainly used for guiding the battery shell. An air blowing port 52 is provided on the side wall of the conveyor profile, located on one side of the belt, to assist in rejecting defective products. In this invention, the conveyor belt has a double-layer structure. The lower layer of the belt is a synchronous belt, and the tooth shape of the synchronous belt is the same as that of the driving wheel and the driven wheel. The upper layer of the belt is a red rubber layer, and grooves are provided at intervals on the surface of the red rubber layer. The grooves are used to fix and drive the cylindrical hollow shell to move. In another different embodiment, the belt structure can be further modified. The belt adopts an integral molding structure. The inner side of the belt is a synchronous belt layer, and the tooth shape of the synchronous belt layer is the same as that of the driving wheel and the driven wheel. The outer side of the belt is integrally molded with a baffle. The gap between the baffles can support the battery shell in the form of two lines in contact, which is used to fix and drive the battery shell to move. Different belts can be selected according to the different needs of the customer site.

[0044] To facilitate comprehensive line scanning inspection of the battery casing at the second inspection station, a unique rotary mechanism 4 was designed, such as... Figure 11As shown, the shell product can be fully presented 360° to the inspection station via three rotating wheels. Specifically, the rotating wheel mechanism 4 includes a base plate 34 located between the inspection conveyor and the outlet conveyor. Support legs 33 are installed at the bottom of the base plate 34. Rotating wheel mounting plates are fixed on both sides of the top of the base plate 34. A first rotating shaft 43, a second rotating shaft 41, and a third rotating shaft 36 are sequentially movably arranged between the two rotating wheel mounting plates. A first rotating wheel 35, a second rotating wheel 42, and a third rotating wheel 44 are respectively fixed on the three rotating shafts. One end of each of the two rotating shafts at both ends passes through the rotating wheel mounting plate and is fixed with a synchronous pulley. One end of the rotating shaft in the middle passes through the rotating wheel mounting plate and is fitted with two synchronous pulleys 37. The two synchronous pulleys 37 in the middle are connected to the synchronous pulleys 37 at both ends via a synchronous transmission belt 39. Furthermore, to make the transmission more precise and avoid slippage, a tensioning mechanism 40 is provided at the bottom of the synchronous transmission belt 39. The tensioning mechanism 40 can adjust the tensioning wheel, which contacts the bottom of the synchronous transmission belt to achieve tension. The design features three rotating shafts: two end rings with radial grooves, and a middle rotating shaft nested within the radial grooves of the two end rings, ensuring no interference between the three rotating shafts and facilitating battery casing transfer; one shaft, located away from the synchronous pulley, is connected to a servo motor 18, which is mounted on a rotating shaft fixing plate 38 via a motor fixing plate 46. The servo motor 18 provides power to the shaft, precisely controls its speed, and performs point braking; the other two rotating shafts rotate with the servo motor-connected shafts via a connected synchronous transmission belt. The synchronous pulleys on all three shafts are identical, ensuring synchronized rotation in the same direction; each rotating shaft has an axially arranged groove on its outer edge, with a strong magnet 65 installed below each groove. The strong magnet 65 attracts and fixes the cylindrical hollow casing, preventing misalignment during rotation; a strong magnet bracket is installed between each of the two rotating shafts to ensure perfect docking and transfer of the casing. The shell product can be fully presented to the inspection station with its outer surface in 360° through three rotating wheels; the bottom plate is provided with an inclined guide plate 45 near the outlet conveyor for the final guidance and conveying of the product.When the housing is attracted to one of the rotating wheels, the system PLC receives a signal and transmits it to the servo motor. The servo motor starts rotating, and the three rotating wheels begin to rotate synchronously. The rotating wheel carries the housing to the strong magnetic support between the rotating wheels, where the housing is attracted to the housing support. The groove of the middle rotating wheel rotates to the strong magnetic support and then attracts the housing to the middle rotating wheel again. The middle rotating wheel carries the housing and rotates. When it rotates to the strong magnetic support, the housing is magnetically attracted to the strong magnetic support again. The groove of the other rotating wheel rotates to the strong magnetic support and then attracts the housing to the other rotating wheel for rotation. The rotating wheel carries the housing to the guide plate 45. The housing is blocked by the guide plate 45 and detaches from the rotating wheel, sliding on the guide plate 45. When the housing slides to the guide plate, the appearance of the housing is presented to the inspection station in 360° through the three rotating wheels.

[0045] To ensure product uniformity before inspection, alignment mechanisms 2 are installed on both sides of the conveyor section near the inspection station, such as... Figure 5 As shown; the alignment mechanism 2 includes a guide plate support 22 fixedly mounted on one side of the conveying section. A alignment mechanism guide plate 21 is mounted on the top of the guide plate support 22. The alignment mechanism guide plate 21 has slots to finely adjust the alignment of the battery casings, allowing it to be positioned slightly to the left or right or centered during conveying. The guide plate support 22 also has slots to finely adjust the height of the alignment mechanism guide plate 21. An adjusting plate 28 is provided on the other side of the conveying section. A support profile 27 is fixedly mounted on the adjusting plate 28. A horizontally arranged cylinder 25 is mounted on the inner top of the support profile 27 via a cylinder fixing plate 26. A push plate 23 is connected to the end of the cylinder 25 via an adapter block 24. The push plate is connected to the cylinder 25 via an adapter block, which avoids fixing it to the cylinder 25 through an opening in the working surface. This ensures that all working surfaces in contact with the battery casing are smooth and flat. The push plate can move back and forth under the action of the cylinder 25, and its height can also be adjusted by fixing the cylinder 25. The push plate 23 and the guide plate 21 of the aligning mechanism work together to straighten the uneven battery casings. Both ends of the push plate 23 and the guide plate 21 of the aligning mechanism near the conveying part are provided with chamfers, which can guide the battery casings that are too offset and prevent the battery casings from directly hitting the side of the guide plate or the push plate and being damaged or knocked away from the detection and conveying.

[0046] When a defective product is detected, it needs to be rejected. Meanwhile, qualified products, having been repeatedly attracted by the magnet during previous inspections, require demagnetization. Therefore, this invention sequentially includes a rejection mechanism 7 and a demagnetization mechanism 8 at the outlet conveyor. See attached diagram for details. Figure 18 and attached Figure 19The rejection mechanism 7 includes a main support leg 53 and an auxiliary support leg 63 fixedly mounted on both sides of the outlet conveyor. A servo motor 54 is mounted on the top of the main support leg 53. The servo motor 54 is connected to the drive shaft 60 via a coupling. One end of the drive shaft 60 away from the servo motor 54 is connected to the top of the auxiliary support leg 63. One end of the drive shaft 60 is mounted on the top side of the main support leg, and the other end is mounted on a bearing mounting plate 62 on the top of the auxiliary support leg. Both ends are fixed with bearing seats 61. A rejection mechanism wheel 64 is fixedly mounted on the drive shaft 60. An axial groove is formed on the side wall of the wheel 64, and a strong magnet 65 is placed inside the groove. The wheel 64 is made of nylon, and the groove is made according to the product shell. The strong magnet 65 inside the groove can effectively attract the shell product. The entire surface of the wheel 64 is specially treated to prevent the shell from... When the body slides on the surface of the rotating wheel, it scratches the surface of the shell, causing secondary scratches to the shell. A protective plate fixing plate 55 is provided above the rotating wheel 64 of the rejection mechanism. One end of the protective plate fixing plate 55 is fixedly connected to the top side of the main support leg of the rejection mechanism. Arc-shaped shell protective plates 66 are installed on both the front and rear sides of the protective plate fixing plate 55. The shell protective plates 66 are located outside the rotating wheel of the rejection mechanism to protect the shell products from falling. An inclined shell guide plate 67 is provided below the shell protective plate 66. The bottom of the shell guide plate 67 is installed on the side of the outlet conveying device through the guide plate fixing leg 68. A collection basket 56 is placed below the shell guide plate 67. Collection baskets 56 are placed at both ends of the rejection mechanism to store defective products. Defective products can be rejected according to the different degrees of defects such as scratches, deformation, and dents. Severely defective products are rejected into the collection basket to wait for direct scrapping. Minorly defective products that can be repaired are rejected into another collection basket for unified repair processing.The top of the auxiliary support leg is equipped with a rejection air port 57 via an air-blowing fixing plate 59. The rejection air port 57 is connected to a solenoid valve 58, mainly used to control the air blowing onto the product, blowing the shell product to the other end of the rotor for easy rejection into the collection basket. There are two air ports 52 on the conveyor belt below the rejection mechanism rotor, one at each end of the shell. The auxiliary rejection mechanism magnetically attracts the defective product into the groove of the rejection mechanism rotor. When the system PLC receives a defective product signal, it transmits the signal to the rejection mechanism and the air-blowing mechanism on the conveyor belt. After receiving the signal, the servo motor of the rejection mechanism starts driving, fine-tuning its position so that the groove on the rotor is aligned with the conveyor belt below the rejection mechanism. After receiving the signal, the air-blowing mechanism begins to collect the shell products on the conveyor belt and collects them. The system receives product signals from the housing and sends them back to the PLC. The PLC analyzes these signals and, if a housing is determined to be defective, transmits the signal to the blowing mechanism on the conveyor belt. The blowing mechanism, located at both ends of the housing, ensures that defective housings are blown into the grooves of the rejecting mechanism's rollers. Once the rejecting mechanism detects the defective housing being magnetically attracted into the groove (a strong magnet is installed on the inner side of the groove near the conveyor belt end of the rejecting mechanism roller to magnetically attract the defective housing blown up by the blowing mechanism; the other end of the rejecting mechanism roller has no strong magnet), it transmits the signal to the PLC. The PLC then transmits the signal to the rejecting mechanism. The servo motor of the rejection mechanism starts and rotates, rotating the shell product to the top rejection air nozzle and stopping. The rejection air nozzle collects the shell product and blows air, blowing it to the other end of the rejection mechanism's rotating wheel. A guard plate is installed on the rejection mechanism's rotating wheel to prevent products from falling. When a product is blown to the other end of the rejection mechanism's rotating wheel, the rejection mechanism's servo motor starts and rotates left or right. (When the system PLC collects a non-conforming product signal, it analyzes the degree of damage such as scratches, deformation, and dents based on the detection data of the detection system and transmits the signal to the servo motor, controlling its left or right rotation. Severely defective products are rejected and placed in the collection basket for direct scrapping; products with minor defects that can be repaired are rejected and moved to another basket.) (Inside the collection basket, awaiting repair), the battery casings slide into the collection basket via a casing guide plate (the rotating wheel needs to be longitudinally slotted; the casing guide plate is inserted into the groove of the rotating wheel. When the casing rotates to the casing guide plate, the casing falls onto the casing guide plate. Since there is no strong magnet at this end of the rejecting mechanism's rotating wheel, and the guide plate is tilted downwards, the casing naturally slides down the guide plate into the collection basket). The demagnetizing mechanism includes a demagnetizing support fixed to one side of the outlet conveying device. A height-adjustable demagnetizing machine bracket 70 is installed on the demagnetizing support. A demagnetizing machine main unit 69 is installed at the bottom of the demagnetizing machine bracket 70. This mechanism can perform preliminary demagnetizing treatment on battery casings that have undergone several magnetic adsorption processes, preventing the battery casings from adsorbing metallic foreign objects that could contaminate good products or cause adhesion between battery casings.

[0047] Example 1

[0048] This embodiment is applied in the cleanroom of a well-known domestic lithium-ion battery structural component manufacturer. The corresponding machine is installed after the cleaning process to replace the original manual inspection.

[0049] The machine has an integrated structure, including the detection section, control box, etc.

[0050] The usage steps of this embodiment are as follows:

[0051] Step 1: In this embodiment, the compressed gas inlet is connected to the customer's compressed gas interface, the inlet valve is opened, and the gas path is connected; the control box is connected to the customer's 220V power supply, the main power switch is rotated, the detection box is powered on, the computer start button on the operation panel is pressed, the industrial control computer is started, and the detection system is officially started.

[0052] Step 2: After the product enters the inspection conveyor belt, the product is fully inspected. If each station of the inspection equipment can take pictures normally and correctly classify and reject defective products, while good products are not rejected, defective products are transported to the next process via the defective product conveyor belt, and good products are transported to the next process via the inspection conveyor belt, then the machine is considered to be in normal use.

[0053] Step 3: Shut down the machine. The control panel in this embodiment has a button to shut down the computer. Before leaving get off work, first shut down the computer, then rotate the switch to turn off the power and close the air inlet valve to disconnect the air supply, thus shutting down the machine. It is very simple and practical to operate. The equipment has been in normal use for a long time. Since its initial use, customer feedback has been positive. It has helped customers eliminate many defective battery casings, effectively reducing customer complaint and return rates. This is a stark contrast to the previous situation where manual inspection was inefficient and inaccurate, and has therefore received high praise and recognition from customers.

[0054] This invention is an offline inspection device based on machine vision principles for detecting the quality of the inner and outer surfaces of a cylindrical hollow battery casing. However, the overall solution is not limited to this type of device. Various cylinders with different diameters, heights, and wall thicknesses are included in this type of inspection. This invention is applied in the production of battery casings, but is not limited to this type. By adjusting the camera angle or adding / removing cameras, various similarly shaped items can be inspected, or both can be inspected simultaneously. Any equivalent substitutions or simple variations made based on this invention to solve essentially the same technical problems and achieve essentially the same technical effects are within the scope of protection of this invention.

[0055] In the description of this invention, it should be noted that the terms "center," "top," "bottom," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A cylindrical hollow shell inspection apparatus, characterized by: The detection station can detect the cylindrical hollow shell; The conveying part can convey the cylindrical hollow shell to the detection station and convey the qualified product to the qualified product area; The conveying part includes a detection conveying device and an outlet conveying device, a rotating wheel mechanism is arranged between the detection conveying device and the outlet conveying device, and the rotating wheel mechanism can rotate the cylindrical hollow shell by 360 degrees; the rotating wheel mechanism includes a bottom plate arranged between the detection conveying device and the outlet conveying device, a supporting leg is arranged at the bottom of the bottom plate, rotating wheel mounting plates are fixedly arranged at the top of the bottom plate, three rotating shafts are sequentially and movably arranged between the two rotating wheel mounting plates, one rotating wheel is fixedly arranged on each of the three rotating shafts, one synchronous wheel is fixedly arranged at one end of each of the two rotating shafts at the two ends and penetrates through the rotating wheel mounting plate, two synchronous wheels are arranged at one end of the rotating shaft in the middle and penetrate through the rotating wheel mounting plate, the two synchronous wheels in the middle are in transmission connection with the synchronous wheels at the two ends through synchronous transmission belts, and a servo motor is in transmission connection with one end of the rotating shaft away from the synchronous wheel; grooves arranged in the axial direction are formed on the outer edges of the rotating wheels, a strong magnetic magnet is arranged below each groove, the strong magnetic magnet can adsorb and fix the cylindrical hollow shell, and a strong magnetic magnet support is arranged between adjacent two rotating wheels; The outlet conveying device is sequentially provided with the rejecting mechanism and the demagnetizing mechanism; the rejecting mechanism includes main and auxiliary supporting legs fixedly arranged on the two sides of the outlet conveying device, a rejecting mechanism servo motor is arranged at the top of the main supporting leg, a rejecting mechanism driving shaft is in transmission connection with the rejecting mechanism servo motor, one end of the rejecting mechanism driving shaft away from the rejecting mechanism servo motor is connected with the top of the auxiliary supporting leg, a rejecting mechanism rotating wheel is fixedly arranged on the rejecting mechanism driving shaft, grooves are formed in the axial direction on the side wall of the rejecting mechanism rotating wheel, and a strong magnetic magnet is arranged in the groove; a guard plate fixing plate is arranged above the rejecting mechanism rotating wheel, one end of the guard plate fixing plate is fixedly connected with one side of the top of the main supporting leg, arc-shaped shell guards are arranged on the front and rear sides of the guard plate fixing plate, the shell guards are arranged outside the rejecting mechanism rotating wheel, an inclined shell guide plate is arranged below the shell guards, the bottom of the shell guide plate is arranged on one side of the outlet conveying device through a guide plate fixing supporting leg, and a collecting basket is arranged below the shell guide plate; a rejecting air outlet is arranged on the top of the auxiliary supporting leg through a blowing fixing plate, and the rejecting air outlet is connected with an electromagnetic valve. The rejection mechanism is magnetic attraction rotation rejection, and unqualified products can be rejected according to different degrees of scratch, deformation, concave-convex point defects, and defects of serious products are rejected into a collection basket for direct scrap processing, and defects of slight products can be repaired and are rejected into another collection basket for unified repair processing.

2. The cylindrical hollow shell inspection apparatus of claim 1, wherein: The detection station comprises a first detection station, the first detection station comprises first, second, third and fourth area array stations arranged on both sides of the conveying part respectively; the first, second and third area array stations each comprise a station support frame, a camera and a light source are arranged on the station support frame, and the positions of the camera and the light source can be adjusted; the fourth area array station comprises a station support frame, an adjusting rod is arranged on the station support frame, and a camera and a light source are arranged on the adjusting rod, and the positions and angles of the camera and the light source on the fourth area array station can be adjusted.

3. The cylindrical hollow shell inspection apparatus of claim 2, wherein: The first detection station is arranged on both sides of the detection conveying device; a second detection station is arranged above the rotating wheel mechanism, the second detection station comprises first, second, third and fourth line-scan camera stations with adjustable heights, and line-scan cameras are arranged on the first, second, third and fourth line-scan camera stations; the angle of the line-scan camera on the first line-scan camera station can be adjusted.

4. The cylindrical hollow shell inspection apparatus of claim 3, wherein: The detection conveying device comprises a conveying profile, the conveying profile is provided with conveying legs at the bottom, a driven wheel is arranged at one end of the conveying profile through a driven end fixing plate, a driving wheel is arranged at the other end of the conveying profile through a driving end fixing plate, the driving wheel and the driven wheel are connected through a closed belt transmission, a servo motor is connected to one end of the driving wheel through a transmission, a pad is arranged between the upper surface of the conveying profile and the belt, and the pad is provided with a slot, and the slot has a width greater than that of the belt.

5. The cylindrical hollow shell inspection apparatus of claim 3, wherein: The outlet conveying device comprises a conveying profile, the conveying profile is provided with conveying legs at the bottom, a driven wheel is arranged at one end of the conveying profile through a driven end fixing plate, a driving wheel is arranged at the other end of the conveying profile through a driving end fixing plate, the driving wheel and the driven wheel are connected through a closed belt transmission, a servo motor is connected to one end of the driving wheel through a driving shaft, a pad is arranged between the upper surface of the conveying profile and the belt, and the pad is provided with a slot, and the slot has a width greater than that of the belt; conveying guide plates are fixedly arranged on the driven end fixing plate, and two conveying guide plates are symmetrically arranged on both sides of the belt; air outlets are arranged on the side walls of the conveying profile, and the air outlets are located on one side of the belt.

6. The cylindrical hollow shell inspection apparatus of claim 4 or 5, wherein: The belt has a double-layer structure, the lower layer of the belt is a synchronous belt, the tooth shape of the synchronous belt is the same as that of the driving wheel and the driven wheel, the upper layer of the belt is a red glue layer, grooves are arranged on the surface of the red glue layer at intervals, and the grooves are used for fixing and driving the movement of the cylindrical hollow shell.

7. The cylindrical hollow shell inspection apparatus of claim 4 or 5, wherein: The belt is an integral structure, the inner side of the belt is a synchronous belt layer, the tooth shape of the synchronous belt layer is the same as the tooth shape of the driving wheel and the driven wheel, the outer side of the belt is integrally formed with a blocking strip, and two adjacent blocking strips are used for fixing and driving a cylindrical hollow shell to move.

8. The cylindrical hollow shell inspection apparatus of claim 1, wherein: The conveying part is provided with a flattening mechanism near both sides of the detection station; the flattening mechanism comprises a guide plate support fixed on one side of the conveying part, a flattening mechanism guide plate is installed on the top of the guide plate support, an adjusting plate is arranged on the other side of the conveying part, a support profile is fixedly installed on the adjusting plate, a horizontally arranged air cylinder is installed on the top inner side of the support profile through an air cylinder fixing plate, a push plate is connected to the end of the air cylinder through an adapter block, and the push plate and the flattening mechanism guide plate are each provided with a chamfer at the two ends near the conveying part.

9. The cylindrical hollow shell inspection apparatus of claim 3, wherein: The demagnetization mechanism comprises a demagnetization support part fixed on one side of the outlet conveying device, a demagnetization machine support with adjustable height is installed on the demagnetization support part, and a demagnetization machine main body is installed at the bottom of the demagnetization machine support.

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