Intelligent identification and sorting equipment and method for defective cans

Abstract

The application relates to the technical field of sorting and identification, and particularly discloses an intelligent identification and sorting device and method for defective cans, wherein the device comprises a detection and identification unit, the detection and identification unit comprises a machine body, a carrying mechanism is arranged in the machine body, the carrying mechanism is used for transferring the cans entering the machine body from one side of the machine body to the other side, the two ends of the carrying mechanism correspond to the conveying line and are arranged close to the conveying line, and a plurality of visual detection mechanisms are further arranged on the two sides of the carrying mechanism, the visual detection mechanisms detect and identify whether the cans transferred by the carrying mechanism are defective; the carrying mechanism comprises a transfer assembly and a plurality of placement stations, the plurality of placement stations are arrayed outside the transfer assembly and are rotationally matched with the transfer assembly, when the transfer assembly works, the placement stations rotate and realize self-rotation of the cans, and then 360-degree dead-angle-free detection of the cans is realized, so that the identification and sorting precision and efficiency of the defective cans are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sorting and identification, and specifically discloses an intelligent identification and sorting device and method for defective cans. BACKGROUND

[0002] As a sealed food, cans are prone to appearance defects such as can body indentation, deformation, weld damage or label peeling and mispositioning due to mechanical impact, stacking and extrusion during production, storage and transportation. These defects not only affect the appearance of the product, but also may damage the sealing performance of the can. Sealing failure may lead to the invasion of external microorganisms, causing the contents to deteriorate and rot. Therefore, accurate identification and sorting of appearance defects before the can leaves the factory is a key link in the production quality assurance.

[0003] However, the existing can defect identification technology generally has the defect of incomplete detection coverage. Most technologies use fixedly installed visual detection cameras that can only capture images of the local surface (such as the top and front) of the can in a stationary state or when translating in a single direction. Since the can is cylindrical or has an irregular shape, the side and other areas of the can may form a detection blind area, and defects such as fine scratches on the side of the can body and slight indentation on the bottom are difficult to capture, resulting in a high rate of missed detection. Defective cans that are missed will still need to be checked by manual re-inspection after entering the subsequent packaging and transportation links, which not only increases the additional labor cost, but also cannot guarantee the thoroughness of the re-inspection, making it difficult to meet the demand for defect identification accuracy in large-scale production. In addition, dust, production residues or oil stains may adhere to the surface of the can during the production process. The existing technology does not have a cleaning mechanism synchronized with detection, and these stains may block the defect features, causing the visual detection system to misjudge (identifying stains as defects or missing real defects due to stain blocking), further reducing the detection accuracy. SUMMARY

[0004] The present application aims to provide an intelligent identification and sorting device for defective cans to at least solve one of the above problems in the prior art.

[0005] Specifically, the present application achieves the above-mentioned purposes by the following technical solutions:

[0006] An intelligent identification and sorting device for defective cans, the device is provided with an inlet unit and an outlet unit on opposite sides, and a sorting unit is further provided on another side of the device different from the opposite sides. The device comprises a detection and identification unit, which comprises a machine body. A carrying mechanism is provided inside the machine body along the conveying direction of the inlet unit. The carrying mechanism is used to transfer cans entering the inside of the machine body from one side of the machine body to the other side. The two ends of the carrying mechanism correspond to and are close to the conveying line. A plurality of visual detection mechanisms are further provided on both sides of the carrying mechanism. The visual detection mechanisms detect and identify whether the cans transferred by the carrying mechanism have defects.

[0007] The carrier mechanism comprises a transfer assembly and a plurality of placing stations, the plurality of placing stations are arranged outside the transfer assembly and are rotationally matched with the transfer assembly, when the transfer assembly works, the placing stations rotate and realize self-rotation of the cans.

[0008] Optionally, the transfer assembly comprises a transfer frame provided with rotating rollers at two ends, and the rotating rollers are externally sleeved with a conveying chain plate.

[0009] Optionally, the transfer frame is internally provided with a support plate close to a conveying area of the conveying chain plate, the top of the support plate is arranged with support rollers for supporting the conveying chain plate, and a strip-shaped slot extending along the conveying direction of the conveying chain plate is further formed in the middle of the internal part of the support plate, the two ends of the strip-shaped slot penetrate through the support plate, and a tooth is formed on one side of the strip-shaped slot.

[0010] Optionally, the placing station comprises a bottom plate rotationally arranged on the conveying chain plate, and a chuck is mounted on the upper part of the bottom plate.

[0011] A rotary linkage mechanism is further arranged at the bottom of the bottom plate, the rotary linkage mechanism comprises a gear and a connecting shaft, the gear is arranged in the internal part of the conveying chain plate and is in meshing cooperation with the tooth, and the connecting shaft is mounted on the top of the gear and penetrates through the conveying chain plate at the top end and is connected with the bottom plate.

[0012] A through groove is formed in the middle of the rotating roller, and the depth of the through groove is matched with the gear.

[0013] Optionally, a guard plate is further sleeved around the bottom plate, the top of the guard plate is protrusively arranged on the bottom plate, and the bottom of the guard plate is fixedly connected on the conveying chain plate and is in rotational cooperation with the bottom plate.

[0014] Optionally, an airflow cleaning assembly is further arranged on the placing station, the airflow cleaning assembly comprises a nozzle and a gas supply mechanism, the airflow output end of the nozzle is upwardly arranged and is obliquely arranged along the axial direction close to the bottom plate, the gas supply mechanism is mounted in the internal part of the conveying chain plate and corresponds to the placing station, and the gas supply mechanism is in communication with the nozzle.

[0015] Optionally, the gas supply mechanism comprises a piston cylinder, the piston cylinder has a gas outlet end and a gas suction end, the gas outlet end is in communication with the nozzle through a gas outlet pipeline, the internal part of the piston cylinder is provided with a piston assembly, the piston assembly drives the gas sucked into the piston cylinder through the gas suction end to be delivered to the nozzle through the gas outlet end and the gas outlet pipeline and sprayed out.

[0016] Optionally, the upper part of the gear is further connected with a cam disc with arc-shaped protrusions on the outer periphery, the outer edge of the cam disc is provided with a matching groove, and a connecting rod is further arranged between the side surface of the matching groove and the piston cylinder, one end of the connecting rod is in sliding fit with the matching groove and the other end extends into the piston cylinder and is connected with the piston assembly.

[0017] Optionally, the sorting unit comprises a sorting chute, the top end of the sorting chute extends through to the inside of the body, and a sorting mechanical hand is arranged at a position close to the sorting chute in the inside of the body, the control terminal of the sorting mechanical hand is signal connected with the visual detection mechanism, and when the visual detection mechanism detects and identifies that there is a flaw on the outside of the can, the control terminal controls the sorting mechanical hand to put the flawed can into the sorting chute for sorting and exclusion.

[0018] An intelligent identification and sorting method of defective cans, the method comprising the following steps:

[0019] Step 1: initial feeding, when the to-be-tested cans are sequentially conveyed close to the body of the detection and identification unit by the feeding unit, the conveying roller of the carrying mechanism drives the conveying chain plate to move along the annular rotary path to drive the placing station to operate, so that the cans are sequentially and accurately fed into each placing station, and the cans are fixed by the chuck on the bottom plate, thereby realizing the sequential feeding of the cans in the feeding unit into the body;

[0020] Step 2: detection and identification, when each placing station carrying a can moves to the upper part of the support plate along with the conveying chain plate and the visual detection mechanism detects and identifies the outside of the can, the gear at the bottom of the placing station gradually enters the strip-shaped slot of the support plate and meshes with the gear teeth on one side of the strip-shaped slot, at this time, the gear moves along with the conveying chain plate and rotates by meshing with the gear teeth in the strip-shaped slot, and then the gear rotates to drive the bottom plate to rotate by the connecting shaft, so that the bottom plate drives the can to rotate, realizing the self-rotation of the can while moving along with the conveying chain plate, at this time, the visual detection mechanism synchronously collects images of the self-rotating can in all directions and identifies whether the can has appearance flaws;

[0021] Step 3: detection process airflow cleaning, while the gear at each placing station drives the can to self-rotate, the cam disc connected to the upper part of the gear rotates synchronously with the gear, so that the cam disc rotates to drive the connecting rod to reciprocate along the radial direction of the cam disc through the matching groove on the outer edge of the cam disc, the connecting rod drives the piston assembly in the piston cylinder to perform reciprocating piston action, so that the piston cylinder draws external gas through the suction end, and then the gas is conveyed to the nozzle through the gas outlet pipeline through the gas outlet end, so that the airflow sprayed by the nozzle directly acts on the surface of the self-rotating can, synchronously cleaning the outside of the can body to avoid stains from blocking the can flaws;

[0022] Step 4: After the visual inspection mechanism completes the defect identification, the detection result is converted into an electrical signal and transmitted to the control terminal of the sorting manipulator; after receiving the signal, the control terminal analyzes and judges:

[0023] If the can is determined to be a good product, the carrier mechanism continues to drive the placement station to move, and when the placement station moves to a position corresponding to the discharging unit, the chuck releases the fixation of the can, and the can is transported to the discharging unit by the carrier mechanism, and then is conveyed to the next production process by the discharging unit;

[0024] If the can is determined to be a defective product, the control terminal sends an action instruction to the sorting manipulator, and when the placement station carrying the defective can moves to a position close to the sorting chute, the sorting manipulator grabs the defective can and puts it into the sorting chute to discharge, so as to complete the sorting of the defective can.

[0025] Compared with the prior art, the present application has at least the following advantages and beneficial effects:

[0026] (1) The carrier mechanism is provided, which includes a transfer assembly and a transfer placement station, and cooperates with the visual inspection mechanism, so that the can rotates synchronously during translation along the conveying chain plate, so that all surfaces of the can body can enter the detection field of view, solving the problem of missed detection caused by the detection blind area of the prior art, and significantly improving the accuracy of defect identification.

[0027] (2) The air flow cleaning assembly is provided, which cleverly utilizes the gear power during the rotation of the can to drive the piston to generate air flow, so that the surface stains of the can body are cleaned in real time during detection, thereby solving the problem of identification error or omission caused by stain shielding, and ensuring the accuracy of identification and sorting.

[0028] (3) The sorting and identification method provided by the present application uses self-rotating detection during the transfer process and synchronous cleaning during the detection process to eliminate the surface detection blind area of the can body, fully capture the defect characteristics, remove the stains shielding, reduce the misjudgment, so that the visual inspection mechanism can obtain a clear image of the full surface of the can body without shielding, thereby reducing the detection error from the source and greatly improving the high accuracy in the process of can sorting and identification.

[0029] In summary, the intelligent identification and sorting device and method for defective cans provided by the present application realize 360° non-dead-angle detection during the conveying of the cans by setting the carrier mechanism capable of driving the cans to rotate in cooperation with the multi-directional visual inspection mechanism, and simultaneously integrate the synchronous cleaning mechanism to eliminate the interference of surface stains, thereby effectively improving the detection accuracy and sorting efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings described herein are used to provide a further understanding of the embodiments of the present application, constitute a part of the present application, and do not constitute a limitation on the embodiments of the present application. In the drawings:

[0031] Figure 1 is a schematic diagram of the overall structure of the present application;

[0032] Figure 2 is a schematic diagram of the structure of the carrier mechanism of the present application;

[0033] Figure 3 is a schematic diagram of the structure of the support plate of the present application;

[0034] Figure 4 is a schematic diagram of the internal structure of the transfer assembly of the present application;

[0035] Figure 5 is a schematic diagram of the side view of the partial structure of the transfer assembly of the present application;

[0036] Figure 6 is a schematic diagram of the structure of the transmission roller of the present application;

[0037] Figure 7 is a schematic diagram of the front view of the sectional structure of the transfer assembly of the present application;

[0038] Figure 8 is a schematic diagram of the steps of the identification sorting method of the present application.

[0039] In the above-mentioned drawings, the reference signs represent: 1, detection and identification unit; 2, feeding unit; 3, discharging unit; 11, carrier mechanism; 12, visual detection mechanism; 41, sorting bevel; 42, sorting mechanical hand; 111, transfer assembly; 112, placement station; 131, nozzle; 132, piston cylinder; 133, piston assembly; 1111, transfer frame; 1112, rotating roller; 1113, conveying chain plate; 1114, support plate; 1121, bottom plate; 1122, guard plate; 1123, gear; 1124, connecting shaft; 1321, gas outlet end; 1322, gas suction end; 11121, through groove; 11141, tooth; 11142, support roller; 11231, cam turntable; 11232, connecting rod; 13211, gas outlet pipeline. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with embodiments, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not limit the present application. The embodiments described below are part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0041] In the following description, numerous specific details are set forth to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details. In other instances, well-known structures, materials, or processes have not been described in detail in order to avoid obscuring the present application. The materials, instruments, and reagents used in the following examples are those that are conventionally used and are available to those skilled in the art unless otherwise specified. The techniques used in the examples are those conventionally used and are well known and available to those skilled in the art unless otherwise specified.

[0042] In addition, the terms "first", "second", etc. are used herein only to describe different instances, and are not used to denote or imply relative importance or a number of the technical features indicated. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0043] Embodiment 1:

[0044] Please see Figures 1 to 7 As shown in the drawings, the present embodiment discloses an intelligent identification and sorting device for defective cans, which is provided with an inlet unit 2 and an outlet unit 3 on opposite sides, and a sorting unit on another side different from the opposite sides. The inlet unit 2 is used to transport the cans to be tested into the detection and identification unit 1 for detection, the outlet unit 3 is used to transport the good cans after detection to the next process, and the sorting unit is used to sort the defective cans after detection. The detection and identification unit 1 includes a body, and a carrying mechanism 11 is arranged inside the body along the conveying direction of the inlet unit 2. The carrying mechanism 11 is used to transfer the cans entering the body from one side of the body to the other side. The two ends of the carrying mechanism 11 correspond to and are close to the conveying line, and a plurality of visual detection mechanisms 12 are arranged on the two sides of the carrying mechanism 11. The visual detection mechanisms 12 detect and identify whether the cans transferred by the carrying mechanism 11 have defects.

[0045] The carrying mechanism 11 includes a transfer assembly 111 and a plurality of placement stations 112. The plurality of placement stations 112 are arrayed outside the transfer assembly 111 and are rotationally connected with the transfer assembly 111. When the transfer assembly 111 works, the placement stations 112 rotate and realize self-rotation of the cans.

[0046] The visual detection mechanism 12 includes an industrial camera and a ring-shaped light supplement lamp, which is arranged at equal intervals on both sides of the conveying path of the carrying mechanism 11, for example.

[0047] It should be noted that in the process of can production, the cans are often dented, deformed or the labels are off due to mechanical impact or stacking pressure. The traditional detection equipment adopts fixed visual detection device, which can only capture the local surface image of the cans when they are static or moving in one direction. Therefore, the other areas of the side surface of the cylindrical cans are prone to form detection blind area, resulting in low detection and recognition accuracy.

[0048] It should be further noted that research has found that the self-rotation movement of the cans can eliminate the detection blind area of the cylindrical surface. However, the existing conveying mechanism is difficult to realize the synchronous dynamic rotation detection of the cans during the transfer process.

[0049] Therefore, based on the above problems, in the present embodiment, the detection and recognition unit 1 is designed in cooperation with the conveying mechanism 11 and the visual detection mechanism 12. When the cans move in the machine body, they follow the translation of the conveying mechanism 11 and the rotation of the placement station 112, realizing full-surface non-blind area detection for the cans.

[0050] Compared with the prior art, the traditional equipment needs to be stopped multiple times for multi-angle shooting. The equipment disclosed in the present embodiment realizes the detection of the cans in the machine body. When the cans are transferred in the conveying mechanism 11, the transfer assembly 111 and the placement station 112 are linked by the mechanical structure design. When the cans to be detected enter the machine body through the feeding unit 2, they will be accurately placed on the placement station 112 of the conveying mechanism 11. Then the transfer assembly 111 starts to operate and drives the arrayed placement stations 112 to move along the conveying direction. Since the placement station 112 and the transfer assembly 111 are connected by a rotating structure, the operation force of the transfer assembly 111 can be converted into the rotation driving force of the placement station 112. That is, the placement station 112 rotates around the axis perpendicular to the conveying direction while translating along the conveying path in the machine body, and the cans placed on it realize the combined movement of translation and rotation.

[0051] Meanwhile, during the composite movement, the plurality of visual detection mechanisms 12 arranged on both sides of the machine body continuously aim at the moving and rotating cans, and solve the problem of incomplete surface collection caused by the static or single translation of the cans in the prior art by using the principle that all surfaces of the cylindrical or special-shaped structure of the cans can be exposed in the detection field of view in sequence when the cans rotate, so that the detection blind area formed by the curvature of the side of the can body and the bottom is gradually brought into the collection range of the visual detection mechanism 12 with the rotation of the cans, the continuous and omnidirectional image collection of the peripheral surface of the cans is realized, the visual blind area in the traditional fixed detection mode is eliminated, it is ensured that each place (including the fine scratches and the slight concave bottom) of the surface of the cans can be captured by the image, the 360° full-surface non-blind area detection of the cans during the transfer process without stopping is realized, the additional cost investment of manual re-inspection of the missed defective cans is avoided, the precision of the flaw identification is greatly improved, the cans with appearance flaws are effectively identified, the food safety and product quality standard are finally ensured, the efficiency loss and error risk caused by manual intervention are reduced, and the detection precision is significantly improved.

[0052] In some embodiments, as shown in Figure 2 and Figure 4 The transfer assembly 111 includes a transfer frame 1111 with two rotating rollers 1112 installed at both ends, and a conveying chain plate 1113 is sleeved outside the two rotating rollers 1112.

[0053] The rotating roller 1112 refers to a cylindrical rotary driving part, which can be implemented by a metal roller body coated with rubber, and the two ends thereof are connected with the transfer frame 1111 through bearings to form a support structure of the annular transmission path. The conveying chain plate 1113 refers to an annular conveyor belt composed of a plurality of chain links, which can be implemented by a metal chain plate with anti-slip patterns on the surface, and is sleeved outside the rotating roller 1112 to form a closed loop for carrying the placement station 112 and transmitting power.

[0054] The embodiment provides a stable installation reference for the rotating rollers 1112 at both ends of the transfer assembly 111 through the transfer frame 1111 as the basic support structure of the transfer assembly 111, and one of the rotating rollers 1112 can rotate under the driving of an external power source (such as a motor), so as to drive the continuously rotating movement of the conveying chain plate 1113 sleeved outside the rotating roller 1112, and form a continuous conveying path to continuously transfer and detect the cans entering the machine body.

[0055] In some optional embodiments, as shown in Figure 3As shown, the inside of the transfer frame 1111 is also provided with a support plate 1114 close to the conveying area of the conveying chain plate 1113, the top of the support plate 1114 is provided with support rollers 11142 for supporting the conveying chain plate 1113, and a strip-shaped slot extending along the conveying direction of the conveying chain plate 1113 is also formed in the inside middle of the support plate 1114, both ends of the strip-shaped slot penetrate through the support plate 1114, and a tooth 11141 is formed on one side of the strip-shaped slot.

[0056] Wherein, the support plate 1114 refers to a plate-shaped structure arranged below the conveying chain plate 1113 and fixedly connected with the transfer frame 1111, which can be formed by processing a metal plate, and the top plane thereof is parallel to the moving track of the conveying chain plate 1113, for providing rigid support. The support roller 11142 refers to a rotatable cylinder installed on the top of the support plate 1114, which can be realized by cooperating a bearing with a roller shaft, and is arranged at equal intervals along the conveying direction, for dispersing the load pressure of the conveying chain plate 1113 and reducing the frictional resistance. The strip-shaped slot refers to a long and narrow opening penetrating through the middle of the support plate 1114 and extending along the conveying direction, for providing meshing space for the gear 1123. The tooth 11141 refers to a continuous tooth-shaped structure arranged on one side of the strip-shaped slot, which can be a straight tooth or an inclined tooth matching the module of the gear 1123, for forming a forced meshing relationship with the gear 1123.

[0057] Compared with the prior art, by arranging the support rollers 11142 on the top of the support plate 1114, the conveying chain plate 1113 after carrying cans can be supported, that is, the sliding friction between the conveying chain plate 1113 and the support plate 1114 is converted into rolling friction by the support rollers 11142, which greatly reduces the resistance when the two move relative to each other, avoids the deviation of the conveying track caused by the sagging of the conveying chain plate 1113 due to the load, reduces the wear of the chain plate to prolong the service life, ensures the stability of the operation of the conveying chain plate 1113, and provides effective support for the placement station 112 and the stable conveying of the cans. The strip-shaped slot provides a precise access channel for the gear 1123 at the bottom of the placement station 112, so that when the placement station 112 moves with the conveying chain plate 1113, the gear 1123 can smoothly enter the strip-shaped slot and mesh with or disengage from the tooth 11141 on the side of the slot, without jamming or misalignment, which ensures the continuous operation of the entire transfer assembly 111 to adapt to the continuous sorting and identification needs of the production line.

[0058] In some optional embodiments, as shown in Figure 4 , Figure 5 and Figure 7 , the placement station 112 includes a bottom plate 1121 rotatably arranged on the conveying chain plate 1113, and a chuck is mounted on the upper part of the bottom plate 1121.

[0059] A rotating linkage mechanism is further arranged at the bottom of the bottom plate 1121, which comprises a gear 1123 and a connecting shaft 1124. The gear 1123 is arranged inside the conveying chain plate 1113 and is in meshing cooperation with the teeth 11141. The connecting shaft 1124 is installed at the top of the gear 1123 and penetrates through the conveying chain plate 1113 at the top end and is connected with the bottom plate 1121.

[0060] The bottom plate 1121 is a circular support for bearing the cans and can be made of aluminum alloy material. Anti-skid lines are arranged on the surface to increase the friction. The bottom plate 1121 is rotatably connected with the conveying chain plate 1113 through a bearing, so that the cans can rotate synchronously with the bottom plate 1121 when being fixed. The chuck is a fixing device for clamping the cans and can be a three-jaw chuck structure. The chuck is installed at the center of the top surface of the bottom plate 1121 to ensure that the axis of the can coincides with the rotation axis of the bottom plate 1121.

[0061] The chuck can quickly clamp and fix the cans when the cans enter the placement station 112, effectively avoiding the problems of position deviation and tilting of the cans during translation or subsequent rotation of the conveying chain plate 1113, and ensuring the stability of the cans during detection.

[0062] The rotating linkage mechanism at the bottom of the bottom plate 1121 forms a stable power transmission path through the meshing cooperation of the gear 1123 and the teeth 11141 on one side of the strip-shaped slot of the support plate 1114. When the conveying chain plate 1113 moves along the conveying area of the support plate 1114, the gear 1123 rotates due to the meshing with the fixed teeth 11141 and directly transmits the rotation to the bottom plate 1121 above through the connecting shaft 1124, so that the bottom plate 1121 drives the cans fixed by the chuck to rotate synchronously. Therefore, the cans can rotate accurately without additional driving devices during transfer and detection, so that the outer surface of the cans (cylindrical or irregular shape) can be exposed in the field of view of the vision detection mechanism 12 on both sides of the machine body in turn and uniformly, ensuring that the fine scratches, slight depressions, and label misalignment on the surface of the can body can be accurately captured by the vision detection mechanism 12, greatly improving the comprehensiveness and accuracy of defect identification. In addition, some dust or debris attached to the surface of the can body during rotation is thrown away under the action of centrifugal force, avoiding the influence of the recognition result caused by the shielding.

[0063] It should be noted that, in order to facilitate the gear 1123 at the bottom of the placement station 112 to pass through smoothly during the movement of the conveying chain plate 1113, as a preferred embodiment, Figure 6As shown, a through groove 11121 is formed in the middle of the rotating roller 1112, and the depth of the through groove 11121 is matched with the gear 1123, so that when the conveying chain plate 1113 moves onto the rotating roller 1112, the through groove 11121 can just accommodate the connecting shaft 1124 and the gear 1123.

[0064] In some embodiments, a guard plate 1122 is further sleeved around the periphery of the bottom plate 1121, the top of the guard plate 1122 is protruded from the bottom plate 1121, and the bottom of the guard plate 1122 is fixedly connected to the conveying chain plate 1113 and rotationally matched with the bottom plate 1121.

[0065] The guard plate 1122 refers to an annular structure around the periphery of the bottom plate 1121, which can be formed by welding or bolt connection with stainless steel material, and the inner diameter is slightly larger than the diameter of the can to form an accommodation space, and the outer diameter is matched with the conveying chain plate 1113 to realize fixed connection. The top of the guard plate 1122 is protruded from the bottom plate 1121 to form a limiting structure for restraining the radial displacement of the can during the self-rotation process.

[0066] The guard plate 1122 can effectively block the can from falling or deviating laterally during the self-rotation of the can driven by the bottom plate 1121 and the translation of the conveying chain plate 1113, and at the same time, the guard plate 1122 is rotationally matched with the bottom plate 1121, which does not interfere with the rotation of the bottom plate 1121, ensuring that the can remains stable during the combined motion of translation and rotation.

[0067] In some preferred embodiments, as shown in Figure 4 and Figure 7 As shown, the placing station 112 is further provided with an airflow cleaning assembly, the airflow cleaning assembly includes a nozzle 131 and a gas supply mechanism, the airflow output end of the nozzle 131 is upwardly arranged and inclined along the axis direction close to the bottom plate 1121, the gas supply mechanism is installed in the inside of the conveying chain plate 1113 and corresponds to the placing station 112, and the gas supply mechanism is in communication with the nozzle 131.

[0068] It should be understood that during the production and transportation of cans, dust, oil stains and other stains will inevitably adhere to the surface of the can body, and the adhesion of these impurities on the surface of the can body will inevitably interfere with the visual detection mechanism 12, causing misjudgment or missed detection of image recognition, and further affecting the detection accuracy of the visual detection mechanism 12. Through research, it is found that the existing technology lacks a cleaning mechanism synchronized with detection, which makes it difficult to meet the requirements of detection accuracy and efficiency in large-scale production. It is further found that the stains on the surface of the can body need to be removed synchronously before detection to avoid shielding the defect features.

[0069] Therefore, compared with the prior art, the embodiment achieves comprehensive and synchronous cleaning of the outer surface of the can during the detection process through the cooperation of the nozzle 131 and the air supply mechanism. Specifically, when the can rotates in the placing station 112, the air supply mechanism generates compressed air flow through the reciprocating motion of the piston assembly 133, which is delivered to the nozzle 131 through the air outlet pipeline 13211. The nozzle 131 directs the air flow to the can body surface at an inclined upward angle, and the air flow direction forms an angle with the can body rotation axis, so that the air flow forms a spiral sweeping path along the circumference of the can body. In this process, the air flow impact force acts on the dust, debris or oil stains attached to the can body surface, and the stains are stripped by the shearing action of the air flow. Therefore, by using the coordinated action of the can rotation and the directional air flow, the can body surface is dynamically cleaned in the whole circumferential direction, thereby effectively eliminating the interference of stains on the visual detection, and avoiding the situation that the visual detection mechanism 12 incorrectly identifies or misses due to the stains attached to the can surface blocking the defects. Thus, it is ensured that the images collected by the visual detection mechanism 12 can clearly present the real appearance characteristics of the can, and the false detection rate and the missed detection rate are greatly reduced.

[0070] In some optional embodiments, specifically in Figure 5 and Figure 7 It has been shown that the air supply mechanism includes a piston cylinder 132, the piston cylinder 132 has an air outlet end 1321 and an air inlet end 1322, the air outlet end 1321 is connected with the nozzle 131 through the air outlet pipeline 13211, and the piston assembly 133 is arranged in the piston cylinder 132. The piston assembly 133 sprays the gas extracted through the air inlet end 1322 in the piston cylinder 132 into the nozzle 131 through the air outlet end 1321 and the air outlet pipeline 13211 by the piston action.

[0071] Wherein, the piston cylinder 132 refers to a cylindrical container with a sealed cavity, which can be realized by a metal cylinder. The air inlet end 1322 is connected with the external environment for gas suction, and the air outlet end 1321 is connected with the nozzle 131 through the pipeline to form a directional air flow channel. The piston assembly 133 refers to a sealed structure that can reciprocate in the cylinder, which can be realized by a combination of a rubber sealing ring and a metal piston rod. The volume of the cylinder is changed by axial displacement to form negative pressure suction and positive pressure exhaust action. The air outlet pipeline 13211 refers to the air guide channel connecting the cylinder and the nozzle 131, which can be realized by a flexible rubber hose or a metal bellows.

[0072] The embodiment can stably extract external gas through the suction end 1322 by the reciprocating action of the piston assembly 133 in the piston cylinder 132, and then accurately deliver the gas to the nozzle 131 through the gas outlet end 1321 and the gas outlet pipeline 13211, so as to continuously provide the nozzle 131 with a gas flow with a certain pressure, thereby ensuring that the nozzle 131 can effectively spray the gas flow to remove dust, debris, oil stains and other stains on the surface of the can to be tested.

[0073] As a supplement, the suction end 1322 and the gas outlet end 1321 are preferably respectively provided with a one-way flow suction valve and a one-way flow gas outlet valve, so that the suction end 1322 and the gas outlet end 1321 can only perform corresponding suction and gas outlet work through the suction valve and the gas outlet valve, avoiding confusion of the gas.

[0074] In some more preferred embodiments, as shown in 4 and Figure 7 In some more preferred embodiments, as shown in 4 and

[0075] The cam disc 11231 is a disc-shaped component coaxially connected with the gear 1123, and the outer shaft surface thereof forms an arc-shaped protrusion structure, which can be formed by metal or high-strength plastic, and is used to transmit the rotary motion of the gear 1123 to the connecting rod 11232. The fitting groove is a curved groove formed along the outer edge of the cam disc 11231, which can be formed by milling or stamping, and the profile thereof is matched with the end of the connecting rod 11232 in sliding mode, and is used to convert the rotary motion of the cam disc 11231 into the linear displacement of the connecting rod 11232. The connecting rod 11232 is a rigid rod connected with the fitting groove and the piston assembly 133 at both ends, which can be made of stainless steel or aluminum alloy, and is used to convert the rotary power of the cam disc 11231 into the reciprocating motion of the piston assembly 133.

[0076] In this embodiment, the mechanical linkage is generated by the gear 1123, cam disc 11231 and connecting rod 11232, and then directly reuses the power of the can self-rotation, so that when the gear 1123 drives the cam disc 11231 to rotate, the connecting rod 11232 can push the piston assembly 133 to reciprocate in the piston cylinder 132, thereby eliminating the need for additional power devices, simplifying the equipment structure, reducing energy consumption and maintenance costs, and achieving the self-rotation detection of the can while the nozzle 131 can continuously spray air flow to remove surface dust and debris, completely avoiding detection errors caused by stains and defects, and finally improving the detection accuracy while achieving the integration and efficiency of the equipment structure.

[0077] Specifically, the transmission link is built by connecting the cam disc 11231 with an arc-shaped protruding outer shaft and an outer edge with a matching slot to the upper part of the gear 1123, and connecting the connecting rod 11232 with one end slidingly fitted in the matching slot and the other end connected to the piston assembly 133. When the gear 1123 drives the can to rotate, the cam disc 11231 rotates synchronously with the gear 1123, and then the curve track of the matching slot after rotation forces the end of the connecting rod 11232 to reciprocate radially along the cam disc 11231, thereby driving the other end of the connecting rod 11232 to reciprocate linearly in the piston cylinder 132. That is, for every rotation of the cam disc 11231, the protrusions and depressions of the matching slot will alternately push or pull the connecting rod 11232, thereby driving the piston assembly 133 to complete a reciprocating action in the piston cylinder 132. Thus, the piston assembly 133 performs a suction action, and the external gas enters the piston cylinder 132 through the suction end 1322 and is compressed, and finally delivered to the nozzle 131 through the gas outlet pipeline 13211 to form a directional air flow. During the rotation of the can, the air flow sprayed by the nozzle 131 continuously acts on the surface of the can body to remove dust or debris attached to the can body. In this way, the surface of the can is cleaned simultaneously during detection, the image acquisition accuracy of the visual detection mechanism 12 is not affected by stains, and the operation efficiency and detection accuracy of the equipment are improved.

[0078] In some optional embodiments, as shown in Figure 1 The sorting unit includes a sorting chute 41 extending through the top end to the inside of the machine body, and a sorting mechanical arm 42 is arranged near the sorting chute in the inside of the machine body. The control terminal of the sorting mechanical arm 42 is signal-connected with the visual detection mechanism 12. When the visual detection mechanism 12 detects and identifies that there is a defect on the outside of the can, the control terminal controls the sorting mechanical arm 42 to put the defective can into the sorting chute for sorting and exclusion.

[0079] Wherein, the sorting bevel 41 refers to the top opening and the body inside the detection area of the inclined guide structure, which can be realized by stamping and forming metal plate and welding to the body side wall, used to guide the sorted cans along the gravity direction out of the equipment. And the sorting mechanical hand 42 refers to the clamping device with multi-degree of freedom motion ability, preferably can adopt the structure of four-axis mechanical arm combined with grabbing suction cup driven by servo motor, realizes the grabbing and putting action of cans through the preset motion trajectory. The control terminal refers to the electronic controller integrated with signal processing and logic operation function, which can be realized by PLC or embedded industrial computer, used to receive the image analysis results of the visual detection mechanism 12 and generate corresponding sorting instructions.

[0080] In this embodiment, the sorting unit is extended through the top of the sorting bevel 41 to the inside of the body, the sorting mechanical hand 42 is arranged near the sorting bevel in the inside of the body, and the control terminal of the sorting mechanical hand 42 is signal connected with the visual detection mechanism 12. When the visual detection mechanism 12 identifies that there is a flaw on the outside of the can, the control terminal can timely control the sorting mechanical hand 42 to put the flawed can into the sorting bevel to discharge, realize the accurate and rapid sorting of the flawed can, and avoid mixing it into the good product to affect the product quality.

[0081] Embodiment 2:

[0082] The difference between embodiment 1 is that, as shown in Figure 8 The method comprises the following steps:

[0083] Initial feeding, through the feeding unit 2, the to-be-tested cans are sequentially transported close to the body of the detection and identification unit 1. The conveying roller of the conveying mechanism 11 drives the conveying chain plate 1113 to move along the annular rotary path, so as to drive the placing station 112 to operate, so that the cans are sequentially and accurately fed into each placing station 112, and the chuck on the bottom plate 1121 fixes the cans, so as to realize the sequential feeding of the cans of the feeding unit 2 into the body;

[0084] When each placement station 112 carrying a can moves to the upper part of the support plate 1114 along the conveying chain plate 1113 and the visual detection mechanism 12 detects and identifies the outside of the can, the gear 1123 at the bottom of the placement station 112 gradually enters the strip-shaped slot of the support plate 1114 and meshes with the gear teeth 11141 on one side of the strip-shaped slot. At this time, the gear 1123 moves along with the conveying chain plate 1113 and rotates by meshing with the gear teeth 11141 in the strip-shaped slot, and then the gear 1123 rotates to drive the bottom plate 1121 through the connecting shaft 1124 to rotate, so as to rotate the can through the bottom plate 1121, realize the self-rotation of the can while moving along with the conveying chain plate 1113, and the visual detection mechanism 12 synchronously collects images of the self-rotating can in all directions and identifies whether the can has appearance defects;

[0085] During the detection process, the gear 1123 rotates the can, and the cam disc 11231 connected to the upper part of the gear 1123 rotates synchronously with the gear 1123, so that the cam disc 11231 rotates and then moves through the fitting groove on the outer edge of the cam disc 11231 to push the connecting rod 11232 to move back and forth along the radial direction of the cam disc 11231, so that the connecting rod 11232 drives the piston assembly 133 in the piston cylinder 132 to move back and forth, so that the piston cylinder 132 sucks external gas through the suction end 1322, and then the gas is delivered to the nozzle 131 through the gas outlet 1321 and the gas outlet pipeline 13211, so that the gas flow sprayed by the nozzle 131 directly acts on the surface of the self-rotating can, synchronously cleans the outside of the can body, and avoids that stains block the defects of the can;

[0086] After the visual detection mechanism 12 completes the defect identification, the detection result is converted into an electrical signal and transmitted to the control terminal of the sorting manipulator 42; after the control terminal receives the signal, it analyzes and judges:

[0087] If it is judged as a good can, the carrier mechanism 11 continues to move the placement station 112, and when it moves to a position corresponding to the discharge unit 3, the chuck releases the fixation of the can, and the can is transported to the discharge unit 3 along with the carrier mechanism 11, and then is delivered to the next production process by the discharge unit 3;

[0088] If it is judged as a defective can, the control terminal sends an action instruction to the sorting manipulator 42, and when the placement station 112 carrying the defective can moves to a position close to the sorting inclined port 41, the sorting manipulator 42 grabs the defective can and puts it into the sorting inclined port 41 to discharge, so as to complete the sorting work of the defective can.

[0089] Compared with the prior art, the traditional sorting identification method adopts fixed detection, resulting in blind area on the side surface of the can body, and lacks online cleaning mechanism. The application realizes self-rotation of the can and synchronous cleaning through mechanical linkage, eliminates the interference of surface stains on image recognition in the detection process, and integrates the cleaning action into the continuous conveying process through the motion conversion of the cam disc 11231 and the piston assembly 133.

[0090] Specifically, the embodiment realizes 360° dead angle-free detection of the can body surface, effectively eliminates the detection blind area, and synchronizes the cleaning action with the conveying process through the mechanical linkage mechanism. Through the synergistic effect of can self-rotation and airflow, the production residues attached to the can body surface are removed in real time, and stains are avoided from being misjudged as defects or covering real defects. The cleaning action is synchronized with the conveying and detection process, which maintains the production line continuous operation efficiency while ensuring the detection accuracy, greatly improving the sorting and identification efficiency.

[0091] In addition, the structures, proportions, sizes, etc. shown in the drawings attached to the specification are schematic drawings, which are only used to cooperate with the disclosed content to understand and read by those skilled in the art, and are not used to limit the implementation conditions of the application, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that the application can produce, should still fall within the scope covered by the disclosed technical content of the application.

[0092] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and other position terms in the specification are only for the clear understanding of the description, and are not used to limit the implementation range of the application. The change or adjustment of the relative relationship is also considered as the implementation scope of the application without substantial change of technical content.

Claims

1. A device for intelligent identification and sorting of defective cans, opposite sides of the device are provided with an inlet unit (2) and an outlet unit (3), and a sorting unit is further provided on another side of the device other than the opposite sides, the device comprises a detection and identification unit (1), characterized in that, The detection and recognition unit (1) comprises a body, a carrying mechanism (11) is arranged inside the body along the conveying direction of the feeding unit (2), the carrying mechanism (11) is used for transferring the cans entering the body from one side of the body to the other side, the two ends of the carrying mechanism (11) are arranged close to the conveying line in correspondence, and a plurality of visual detection mechanisms (12) are further arranged on the two sides of the carrying mechanism (11), the visual detection mechanisms (12) detect and recognize the cans transferred by the carrying mechanism (11) to determine whether there are defects; The carrying mechanism (11) comprises a transfer assembly (111) and a plurality of placement stations (112), a plurality of the placement stations (112) are arranged outside the transfer assembly (111) and are rotationally matched with the transfer assembly (111), when the transfer assembly (111) works, the placement stations (112) rotate and realize self-rotation of the cans; The transfer assembly (111) comprises a transfer frame (1111) provided with rotating rollers (1112) at two ends, and a conveying chain plate (1113) is arranged outside the two rotating rollers (1112); The inside of the transfer frame (1111) is further provided with a support plate (1114) close to the conveying area of the conveying chain plate (1113), a strip-shaped slot extending along the conveying direction of the conveying chain plate (1113) is further formed in the middle of the inside of the support plate (1114), and a tooth (11141) is formed on one side of the strip-shaped slot; The placement station (112) comprises a bottom plate (1121) rotationally arranged on the conveying chain plate (1113), a rotating linkage mechanism is further arranged at the bottom of the bottom plate (1121), the rotating linkage mechanism comprises a gear (1123) and a connecting shaft (1124), the gear (1123) is arranged inside the conveying chain plate (1113) and is matched with the tooth (11141), and the connecting shaft (1124) is arranged at the top of the gear (1123) and penetrates through the conveying chain plate (1113) and is connected with the bottom plate (1121); The placement station (112) is further provided with an airflow cleaning assembly, the airflow cleaning assembly comprises a nozzle (131) and a gas supply mechanism, the airflow output end of the nozzle (131) is arranged upward and inclined along the axis direction close to the bottom plate (1121), the gas supply mechanism is arranged inside the conveying chain plate (1113) and corresponds to the placement station (112), and the gas supply mechanism is connected with the nozzle (131); The air supply mechanism comprises a piston cylinder (132) having an air outlet end (1321) and an air inlet end (1322), the air outlet end (1321) is connected with the nozzle (131) through an air outlet pipeline (13211), and the piston cylinder (132) is internally provided with a piston assembly (133), the piston assembly (133) drives the air in the piston cylinder (132) drawn through the air inlet end (1322) to be delivered to the nozzle (131) through the air outlet end (1321) and the air outlet pipeline (13211) and sprayed out through the nozzle (131) by piston action; The upper part of the gear (1123) is further connected with a cam disc (11231) provided with an arc-shaped protrusion on the outer periphery, the outer edge of the cam disc (11231) is provided with a matching groove, and a connecting rod (11232) is further arranged between the side surface of the matching groove and the piston cylinder (132), one end of the connecting rod (11232) is in sliding fit with the matching groove and the other end extends into the piston cylinder (132) and is connected with the piston assembly (133), when the cans rotate in the placing stations (112), the air supply mechanism generates compressed air flow through the reciprocating movement of the piston assembly (133).

2. The intelligent identification and sorting device for defective cans according to claim 1, characterized in that, The top of the support plate (1114) is provided with support rollers (11142) for supporting the conveying chain plate (1113), and the two ends of the strip-shaped slot pass through the support plate (1114).

3. The intelligent identification and sorting device for defective cans according to claim 2, characterized in that, The chuck is mounted on the upper part of the bottom plate (1121). The middle part of the rotating roller (1112) is provided with a through groove (11121), and the depth of the through groove (11121) is matched with the gear (1123).

4. The intelligent identification and sorting device for defective cans according to claim 3, characterized in that, The bottom plate (1121) is further sleeved with a guard plate (1122), the top of the guard plate (1122) protrudes from the bottom plate (1121), and the bottom of the guard plate (1122) is fixedly connected to the conveying chain plate (1113) and rotationally matched with the bottom plate (1121).

5. The intelligent identification and sorting device for defective cans according to claim 1, characterized in that, The sorting unit comprises a sorting chute (41), the top end of the sorting chute (41) extends to the inside of the machine body, and a sorting mechanical arm (42) is arranged at the position close to the sorting chute in the inside of the machine body, the control terminal of the sorting mechanical arm (42) is signal connected with the visual detection mechanism (12), when the visual detection mechanism (12) detects and identifies that there is a flaw on the outside of the can, the control terminal controls the sorting mechanical arm (42) to put the flawed can into the sorting chute (41) for sorting and exclusion.

6. The method of claim 5, wherein the method is performed by the apparatus of claim 5. The method comprises the following steps: When the to-be-tested cans are sequentially conveyed close to the machine body of the detection and identification unit (1) through the feeding unit (2), the conveying roller of the conveying mechanism (11) drives the conveying chain plate (1113) to move along the annular rotation path, so as to drive the placing stations (112) to rotate, so that the cans are sequentially and accurately fed into the placing stations (112), and the cans are fixed by the chucks on the bottom plate (1121), so that the cans fed by the feeding unit (2) are sequentially conveyed into the machine body. When each placement station (112) carrying a can moves to the upper part of the support plate (1114) with the conveying chain plate (1113) and the outer part of the can is detected and recognized by the visual detection mechanism (12), the gear (1123) at the bottom of the placement station (112) gradually enters the strip-shaped slot of the support plate (1114) and meshes with the gear teeth (11141) on one side of the strip-shaped slot. At this time, the gear (1123) moves with the conveying chain plate (1113) and rotates by meshing with the gear teeth (11141) in the strip-shaped slot, and then the gear (1123) rotates to drive the bottom plate (1121) to rotate through the connecting shaft (1124), so as to rotate the can through the bottom plate (1121), realize the self-rotation of the can while moving with the conveying chain plate (1113), and the visual detection mechanism (12) synchronously collects images of the self-rotating can in all directions and identifies whether the can has appearance defects; During the detection process, the airflow is cleaned. While the gear (1123) of each placement station (112) drives the can to rotate, the cam disc (11231) connected to the upper part of the gear (1123) rotates synchronously with the gear (1123), so that the cam disc (11231) rotates and then moves through the fitting groove on the outer edge of the cam disc (11231) to push the connecting rod (11232) to move back and forth along the radial direction of the cam disc (11231), so that the connecting rod (11232) drives the piston assembly (133) in the piston cylinder (132) to perform reciprocating piston action, so that the piston cylinder (132) sucks external gas through the suction end (1322), and then delivers the gas to the nozzle (131) through the gas outlet (1321) and the gas outlet pipeline (13211), so that the gas flow sprayed by the nozzle (131) directly acts on the surface of the rotating can, synchronously cleaning the outside of the can body to avoid stains blocking the can defects; After the visual detection mechanism (12) completes the defect identification, the detection result is converted into an electrical signal and transmitted to the control terminal of the sorting manipulator (42). After receiving the signal, the control terminal analyzes and judges: If it is determined that the can is good, the carrier mechanism (11) continues to move the placement station (112), and when it moves to the position corresponding to the discharging unit (3), the chuck releases the fixation of the can, and the can is transported to the discharging unit (3) with the carrier mechanism (11), and then delivered to the next production process by the discharging unit (3); If it is determined that the can has defects, the control terminal sends an action instruction to the sorting manipulator (42). When the placement station (112) carrying the defective can moves to a position close to the sorting chute (41), the sorting manipulator (42) grabs the defective can and puts it into the sorting chute (41) to complete the sorting of the defective can.

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