Visual detection equipment for appearance of piston

Abstract

The invention discloses visual detection equipment for piston appearance, and aims to solve the problem of manual visual detection of piston surface defects. The equipment comprises a machine frame provided with a main control system, and the machine frame is provided with a glass rotating disc, and a feeding assembly, a guiding assembly, a plurality of visual detection assemblies, a material picking assembly and a discharging assembly which are sequentially arranged in the rotating direction of the glass rotating disc. The feeding assembly stably and accurately conveys pistons to the glass rotating disc through a conveying belt structure. The guide assembly ensures stable piston conveying; the visual detection assembly detects and analyzes the bottom, the top, the circumferential surface and the size of the piston and transmits data to the main control system; the material removing assembly and the material discharging assembly are the same in structure, and qualified pistons and unqualified pistons are conveyed away according to instructions of the main control system. According to the equipment, the visual inspection technology is used for replacing manual visual inspection, the detection accuracy and efficiency are improved, automatic classification treatment is achieved, the piston production quality and efficiency are improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and particularly to a piston appearance visual detection equipment. Background Art

[0002] As an important part in the industrial system, pistons are widely used in fields such as construction machinery, hydraulic pneumatic, and automobile manufacturing. During the production processes such as machining, chrome plating, and polishing of pistons, the surface is prone to defects such as scratches and bumps, which affect the product quality. During the production process, it is necessary to detect and process the pistons with the above-mentioned defects, which can effectively avoid abnormalities during subsequent use.

[0003] Currently, for the detection method of piston surface defects, most of them use manual visual inspection. Technicians place the pistons under strong light and observe them one by one. When observing the same thing for a long time, the human eye is extremely prone to visual fatigue, which affects the product detection effect, and the detection efficiency is low and the labor cost is relatively high. Summary of the Invention

[0004] The main object of the present invention is to provide a piston appearance visual detection equipment, aiming to reduce the relatively high labor cost caused by manual detection. The bottom, top, circumferential surface, and size of the piston are detected and analyzed by an automated visual detection component, and the material rejection component and the discharging component are controlled by means of a main control system to achieve efficient and accurate detection and classification processing of piston appearance defects, effectively improving the quality of piston products and avoiding abnormalities during subsequent use.

[0005] To achieve the above object, the present invention proposes a piston appearance visual detection equipment, including a frame installed with a main control system. A glass turntable is arranged on the frame, and a feeding component, a guiding component, several visual detection components, a material rejection component, and a discharging component are sequentially arranged along the rotation direction of the glass turntable; the several visual detection components are used to detect and analyze the bottom, top, circumferential surface, and size of the piston respectively, and transmit the data to the main control system, so that the main control system controls the material rejection component or the discharging component to work, pushing the piston away from the glass turntable and sending it out of the equipment.

[0006] In a possible implementation manner, the feeding component adopts a conveyor belt structure, including a mounting frame fixedly arranged on the frame. A pair of driving wheels are rotatably arranged on the mounting frame, and a conveyor belt is connected between the pair of driving wheels; the conveyor belt is arranged in a straight line direction, and its discharging end corresponds to the position of the guiding component.

[0007] In a possible implementation manner, the top surface of the conveyor belt is flush with the top surface of the glass turntable, and the movement direction of the conveyor belt is tangent to the outer edge of the glass turntable.

[0008] In a possible implementation, a guiding member is further provided at the discharging end of the conveyor belt, and the guiding member is used to guide the piston from the conveyor belt towards the glass turntable.

[0009] In a possible implementation, the guiding member includes a guiding plate fixedly arranged above the conveyor belt. The guiding plate is strip-shaped, and one end of it extends towards the glass turntable until it reaches the position of the guiding assembly.

[0010] In a possible implementation, the guiding assembly includes a lifting frame arranged on the frame. A guiding member located above the glass turntable is arranged on the lifting frame, and a material guiding channel for the piston to pass through is formed between the guiding member and the guiding plate.

[0011] In a possible implementation, the guiding member includes a connecting rod connected to the lifting frame. A butting block is connected to the lower end of the connecting rod, and the butting block has a disc-shaped structure.

[0012] In a possible implementation, the guiding member and the guiding plate are respectively located at the upper end and the lower end of the piston.

[0013] In a possible implementation, the material removing assembly has the same structure as the discharging assembly, and includes a fixed bracket arranged on the frame. A conveyor belt is driven and arranged on the fixed bracket. The conveyor belt is arranged in a straight line direction and is arranged towards the center of the glass turntable. It further includes a material pushing assembly arranged on the fixed bracket. The material pushing assembly is arranged above the inner side of the glass turntable and is used to axially move the piston towards the conveyor belt.

[0014] In a possible implementation, the material pushing assembly includes a cylinder arranged on the fixed bracket, and a pushing plate is arranged at the output end of the cylinder.

[0015] In summary, the beneficial effects of the present application are as follows: Compared with the prior art, the piston appearance visual inspection device of the present invention has significant beneficial effects. The device realizes efficient and accurate piston appearance inspection by arranging a glass turntable on the frame equipped with a main control system, and successively arranging a feeding assembly, a guiding assembly, several visual inspection assemblies, a material removing assembly and a discharging assembly along its rotation direction.

[0016] Among them, the feeding assembly adopts a conveyor belt structure, including a mounting frame, a driving wheel and a conveyor belt. The discharging end of the conveyor belt corresponds to the guiding assembly and the top surface is flush with the top surface of the glass turntable. The moving direction is tangent to the outer edge of the glass turntable. A guiding member is arranged at the discharging end, which can stably and accurately convey the piston to the glass turntable.

[0017] A guiding member is arranged on the lifting frame of the guiding assembly, and a material guiding channel is formed with the guiding plate, which can ensure the stability and accurate guiding of the piston during the conveying process.

[0018] A number of visual inspection components respectively inspect and analyze the bottom, top, circumferential surface and dimensions of the piston, and transmit the data to the main control system. The design principle is to use visual inspection technology to replace manual visual inspection, avoiding the problem that the visual fatigue caused by long-term manual observation affects the inspection effect, and greatly improving the inspection accuracy and efficiency.

[0019] The material rejection component has the same structure as the discharging component, including a fixed bracket, a conveyor belt and a material pushing component. The cylinder and the push plate of the material pushing component can axially move the piston to the conveyor belt, and according to the instructions of the main control system, send the qualified and unqualified pistons away from the equipment respectively, realizing automatic classification processing, effectively avoiding the problems of low manual processing efficiency and high cost, overall improving the production quality and production efficiency of the piston, and reducing the production cost. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a three-dimensional external view structure diagram of the present invention; Figure 2 It is an internal structure diagram of the present invention; Figure 3 It is a component distribution diagram of the present invention; Figure 4 It is a structure diagram of the glass turntable component of the present invention; Figure 5 It is a structure diagram of the feeding component of the present invention; Figure 6 It is Figure 2 An enlarged view of part A; Figure 7 It is Figure 5 An enlarged view of part B.

[0022] Explanation of the reference numerals in the drawings: 1. Frame; 2. Glass turntable; 21. Driving motor; 22. Mounting plate; 3. Loading component; 31. Mounting frame; 32. Transmission belt; 33. Control motor; 34. Guide component; 341. Guide plate; 4. Guiding component; 41. Lifting frame; 42. Guide piece; 421. Connecting rod; 422. Contact block; 43. Feeding channel; 5. Visual inspection component; 51. Bottom inspection component; 52. Top inspection component; 53. Dimension inspection component; 54. Circumferential surface inspection component; 6. Rejection component; 7. Discharging component; 80. Fixed bracket; 81. Conveyor belt; 82. Cylinder; 83. Pushing plate.

[0023] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0024] In order to make the object, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] As Figures 1-7 shown, the present invention provides a visual inspection device for piston appearance, which includes a frame 1 installed with a main control system. A glass turntable 2 and a loading component 3, a guiding component 4, several visual inspection components 5, a rejection component 6 and a discharging component 7 are sequentially arranged on the frame 1 along the rotation direction of the glass turntable 2.

[0026] Among them, the loading component 3 adopts a conveyor belt structure, which includes a mounting frame 31 fixedly arranged on the frame 1. A pair of transmission wheels are rotatably arranged on the mounting frame 31, and a transmission belt 32 is connected between the pair of transmission wheels; the transmission belt 32 is arranged in a straight line direction, and its discharging end corresponds to the position of the guiding component 4.

[0027] As Figures 2-4 shown, among them, a control motor 33 is arranged on the mounting frame 31. The control motor 33 is drivingly connected to one of the transmission wheels through belt drive, so as to drive the transmission belt 32. Through the transmission belt 32, external pistons can be conveyed towards the glass turntable 2; by using the transmission belt 32 to convey the pistons, compared with the existing conveying structures such as vibrating bowls, the transmission belt 32 is used to convey large-size pistons, such as automobile engine pistons, so as to ensure the stability of the conveying.

[0028] Furthermore, the top surface of the transmission belt 32 is flush with the top surface of the glass turntable 2, and the moving direction of the transmission belt 32 is tangent to the outer edge of the glass turntable 2. The top surface of the transmission belt 32 is flush with the top surface of the glass turntable 2, and the moving direction is tangent to the outer edge of the glass turntable 2.

[0029] The flush design eliminates the bumps or jams caused by the height difference during the transfer of the piston, enabling the piston to smoothly transfer from the conveyor belt 32 to the glass turntable 2. The tangent movement direction provides a reasonable cutting-in angle for the transfer of the piston. With the help of the movement inertia of the conveyor belt 32, the piston can naturally fit the movement trajectory of the glass turntable 2 and smoothly enter the subsequent process, greatly improving the accuracy and efficiency of feeding.

[0030] This layout enables the piston to smoothly and smoothly transition to the glass turntable 2 by virtue of the power of the conveyor belt, reducing the jams or position offsets caused by height differences or angular deviations, and ensuring the efficiency and stability of the feeding process.

[0031] Furthermore, in order to ensure that the pistons conveyed by the conveyor belt 32 can smoothly move onto the glass turntable 2, a guiding member 34 is provided at the discharge end of the conveyor belt 32. The guiding member 34 is used to guide the pistons from the conveyor belt towards the glass turntable 2.

[0032] As Figure 2 、 5 、shown in Figure 6, specifically, the guiding member 34 includes a guiding plate 341 fixedly arranged above the conveyor belt. The guiding plate 341 is strip-shaped, and one end thereof extends across the conveyor belt 32 towards the glass turntable 2 until it reaches the position of the guiding assembly 4; the guiding plate 341 is obliquely arranged in front of the moving path of the conveyor belt 32, thereby realizing the blocking of the piston. When the piston contacts the guiding plate 341, as the conveyor belt 32 moves forward, the piston will move obliquely along the guiding plate 341 towards the glass turntable 2 under the action of the conveyor belt 32, and thus slowly move onto the glass turntable 2; thereby ensuring that the piston can smoothly move onto the glass turntable 2.

[0033] Moreover, the setting of the guiding plate 341 not only changes the movement direction of the piston but also buffers the force generated when the piston moves forward under the action of the conveyor belt 32. Compared with the existing structure in which the conveyor belt 32 is arranged axially towards the center of the turntable, the setting of the guiding plate 341 enables the acting force generated when the piston moves forward under the action of the conveyor belt 32 to play a buffering role, thereby avoiding damage to the turntable made of glass by the piston.

[0034] Further, to ensure that the position of the piston on the glass turntable 2 is within the detection area, so that all parts of the piston can be effectively detected and the detection result is more accurate. Therefore, a guiding component 4 is provided before the vision detection component 5. The guiding component 4 includes a lifting frame 41 arranged on the frame 1. A guiding member 42 located above the glass turntable 2 is arranged on the lifting frame 41. A feeding channel 43 for the piston to pass through is formed between the guiding member 42 and the guiding plate 341. The guiding member 42 includes a connecting rod 421 connected to the lifting frame 41. A contact block 422 is connected to the lower end of the connecting rod 421. The contact block 422 has a disc-shaped structure. The guiding member 42 and the guiding plate 341 are respectively located at the upper end and the lower end of the piston.

[0035] Among them, the lifting frame 41 is composed of a guide rail and a slider. The slider can be fixed at a certain height on the guide rail through a locking structure such as a bolt, so as to adjust the height of the guiding member 42 and make it match pistons of different sizes. The guiding member 42 is arranged above the glass turntable 2 and during the working process, it is at the upper part of the piston. When the piston reaches the glass turntable 2 under the action of the conveyor belt 32, due to the sudden change in the movement direction and speed of the piston, there will be inertia, so the piston is prone to problems such as forward tilt, shaking or posture change, which affects the detection of the piston. The guiding member 42 is arranged in the direction of the discharge end of the conveyor belt 32 and at the front end of the movement direction of the piston. Therefore, when the piston reaches the turntable, its upper part will contact the guiding member 42, so that the guiding member 42 has a supporting effect on the piston to avoid the piston shaking and tilting forward and ensure the stability of the piston.

[0036] At the same time, the guiding member 42 also cooperates with the guiding plate 341, and a feeding channel 43 is formed between the two. Driven by the glass turntable 2, the piston will first move along the feeding channel 43 and be guided to the detection area of the glass turntable 2, so as to ensure that all parts of the piston can be effectively detected by the vision detection component 5 in the subsequent process, thereby improving the accuracy of the detection result. At the same time, the guiding plate 341 is located below the piston assembly, and the guiding member 42 is located above the piston assembly. Such an arrangement can constrain the upper and lower ends of the piston, thereby suppressing the shaking of the piston in the horizontal direction and ensuring the stable posture of the piston during the movement process.

[0037] The guiding member 42 is composed of a connecting rod 421 and a disc-shaped abutting block 422. When the piston reaches the glass turntable 2, the peripheral side of the upper end of the piston will abut against the peripheral side of the abutting block 422. During the process of the turntable driving the piston to move, when the arc-shaped edge formed by the disc-shaped abutting block 422 contacts the piston and guides its position, the piston can be guided along an arc path to the detection area of the turntable. This guiding path realizes the smooth transition of the piston from the initial position to the detection area. Compared with linear guiding, the arc guiding better conforms to the circular motion characteristics of the glass turntable 2, avoiding possible collisions, jams or position deviations of the piston during the turning process. This not only ensures that the piston can accurately enter the detection area, creating conditions for the subsequent vision detection component 5 to accurately detect each part of the piston, but also effectively reduces the interference caused by the unstable position of the piston to the detection result, greatly improving the accuracy and stability of the entire detection process. At the same time, this design also improves the smoothness of the equipment operation, reduces equipment failures caused by poor piston transportation, and ensures production efficiency.

[0038] Subsequently, the guided piston will sequentially pass through several vision detection components 5. The several vision detection components are used to respectively detect and analyze the bottom, top, circumferential surface and dimensions of the piston, and transmit the data to the main control system, so that the main control system controls the material rejection component 6 or the discharging component 7 to work, pushing the piston away from the glass turntable 2 and sending it out of the equipment.

[0039] As Figures 2-3 shown, specifically, a driving motor 21 connected to the main control system is provided on the frame 1. The driving motor 21 is connected to a mounting plate 22. The glass turntable 2 is annularly mounted on the mounting plate 22. By controlling the driving motor 21, the rotation of the glass turntable 2 can be controlled, thereby driving the piston to rotate along the movement path of the glass turntable 2, so that the piston can pass through each vision detection component 5 to reach the position of the material rejection component 6 or the discharging component 7.

[0040] The vision detection component 5 includes a bottom detection component 51, a top detection component 52, a dimension detection component 53 and a circumferential surface detection component 54 arranged in sequence along the rotation direction of the turntable; Among them, the bottom vision detection component 5 selects a high-resolution industrial camera such as Basler acA2040-90um. The camera is arranged below the glass turntable 2 and is matched with a bottom annular light source arranged around the camera lens. The lens is adapted according to the size and detection accuracy requirements of the bottom of the piston. During operation, when the piston rotates to below the bottom vision detection component 5 along with the glass turntable 2, under the uniform illumination of the light source, the camera quickly and clearly captures the image of the bottom of the piston by virtue of its high frame rate and high pixel characteristics, converts the optical image into an electrical signal using the principle of optical imaging, and then generates a digital image.

[0041] The top vision detection component 5 is similar. For example, a camera of the FLIR GS3-U3-123S6M model is adopted, combined with a combination of direct and oblique top light sources to highlight specific top structures or defect features, so as to image the piston top.

[0042] The dimension detection component 53 uses a high-resolution industrial camera combined with precise calibration technology to achieve precise measurement of the piston dimensions. At the same time, a specific telecentric lens is equipped to eliminate the dimension measurement error caused by the viewing angle. Multiple groups of evenly distributed light sources are set around the measurement position to ensure uniform illumination in the measurement area. During operation, the piston rotates with the glass turntable 2 to the dimension detection component 53, and the camera takes pictures of the piston from a specific angle to obtain an image containing the piston contour. The main control system converts the pixel information in the image into actual physical dimension information through a series of image processing algorithms such as edge detection and contour extraction of the image, combined with the precise calibration data of the measurement system in advance, so as to accurately measure various dimension parameters of the piston.

[0043] The circumferential surface detection component 54 can adopt multiple industrial cameras of the IDSuEyeUI-5240CP-NIR model, and each camera is equipped with a linear light source parallel to the shooting direction. During the rotation of the piston, the linear light source illuminates the circumferential surface, and multiple cameras continuously take clear images. This component uses AI detection technology. The main control system pre-uses a large amount of piston image data with various circumferential surface defect annotations to deeply train the AI model, so that the model learns and masters the characteristic patterns of different defects. During actual detection, the image of the piston circumferential surface taken by the camera is transmitted to the main control system in real time, and the AI model analyzes and identifies the image based on the learned characteristic patterns, and accurately judges whether there are defects, the defect type and location and other detailed information on the circumferential surface.

[0044] The image data collected by each vision detection component 5 is transmitted to the main control system in real time through a high-speed gigabit Ethernet interface.

[0045] The hardware of the main control system takes a high-performance industrial computer as the core, is equipped with a large-capacity storage device for storing detection data and various algorithm programs, has multiple data acquisition interfaces to receive data from the vision detection component 5, and the control output interfaces are connected to the control circuits of the material rejection component 6 and the discharging component 7. Input and output devices such as a display, a keyboard, and a mouse are configured to achieve human-machine interaction. The software part includes an image acquisition and processing module, a data analysis and decision-making module, and a device control module. After receiving the image data transmitted by the vision detection component 5, the image acquisition and processing module performs preprocessing operations such as grayscale conversion, filtering, and edge detection to enhance the image features for subsequent analysis. The data analysis and decision-making module performs in-depth analysis on the preprocessed image using AI algorithms and traditional defect recognition and dimension calculation algorithms, compares the piston detection data with the preset standard values, and determines whether the piston is qualified. The device control module sends corresponding control instructions to the material rejection component 6 or the discharging component 7 according to the judgment result of the data analysis and decision-making module. If the piston is unqualified, the main control system controls the material rejection component 6 to push it away from the glass turntable 2 and send it out of the device; if the piston is qualified, it controls the discharging component 7 to send it out of the device and enter the next production process.

[0046] The above-mentioned vision detection component 5 and related software programs are all prior arts, so only their functions are introduced and described.

[0047] Finally, the inspected pistons will reach the workstations of the material rejection component 6 or the discharging component 7 driven by the glass turntable 2, as Figure 2 、 5 、shown in Figure 7. The material rejection component 6 and the discharging component 7 have the same structure, including a fixed bracket 80 arranged on the frame 1. A conveyor belt 81 is drivably arranged on the fixed bracket 80. The conveyor belt 81 is arranged in a straight line direction and is arranged towards the center of the glass turntable 2. It also includes a pusher component arranged on the fixed bracket 80. The pusher component is arranged above the inner side of the glass turntable 2 and is used to axially move the piston towards the conveyor belt 81. The pusher component includes a cylinder 82 arranged on the fixed bracket 80. A push plate 83 is arranged at the output end of the cylinder 82. The cylinder 82 is connected to an external air source, and the cylinder 82 can be controlled through the air source.

[0048] Specifically, a motor for driving the conveyor belt 81 is provided on the fixed bracket 80. The motor can keep the conveyor belt 81 in motion at all times. The conveyor belt 81 is arranged on the fixed bracket 80, and its top surface is located below the glass turntable 2. This arrangement ensures that the piston can be smoothly pushed onto the conveyor belt 81. The conveyor belt 81 is arranged along a straight line and toward the center of the glass turntable 2. The straight line arrangement is conducive to the piston moving smoothly in a single direction after being pushed onto the conveyor belt 81, reducing blockages or jams that may be caused by a curved path. The arrangement toward the center of the glass turntable 2 is compatible with the layout of the glass turntable 2, so that the pushing assembly can easily push the piston on the glass turntable 2 onto the conveyor belt 81, providing a channel for the piston to leave the glass turntable 2.

[0049] Meanwhile, the pusher assembly, located above and inside the glass turntable 2, consists of a cylinder 82 fixed to a fixed bracket 80 and a push plate 83 at the output end of cylinder 82. The mechanism utilizes cylinder 82 as a power source. When the main control system issues a command, cylinder 82 activates, driving the piston through changes in internal air pressure, causing the piston rod to extend or retract, which in turn drives push plate 83. Push plate 83 then moves the piston axially toward conveyor belt 81, pushing the piston.

[0050] This structural design enables the equipment to automatically sort and extract pistons. After the pistons are inspected by visual inspection component 5, the main control system controls the operation of either the ejector component 6 or the pusher component of the discharge component 7 based on the inspection results. If the piston fails, the pusher component of ejector component 6 pushes it onto the ejector conveyor 81 for transport out of the equipment. If it passes, the pusher component of the discharge component 7 pushes it onto the discharge conveyor 81 for transport out of the equipment. This ensures the effective separation of rejected and qualified products, ensuring product quality while improving production efficiency.

[0051] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0052] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A piston appearance visual inspection device, comprising a frame (1) equipped with a main control system, characterized in that, A glass turntable (2) is provided on the frame (1), and a feeding component (3), a guiding component (4), several visual inspection components (5), a rejecting component (6) and a discharging component (7) are sequentially arranged along the rotation direction of the glass turntable (2); the several visual inspection components (5) are used to respectively detect and analyze the bottom, top, circumferential surface and dimensions of the piston, and transmit the data to the main control system, so that the main control system controls the rejecting component (6) or the discharging component (7) to work, push the piston away from the glass turntable (2) and send it out of the equipment.

2. The appearance visual inspection device for a piston according to claim 1, wherein, The feeding component (3) adopts a conveyor belt structure, including a mounting frame (31) fixedly arranged on the frame (1), and a pair of driving wheels are rotatably arranged on the mounting frame (31), and a conveyor belt (32) is connected between the pair of driving wheels; the conveyor belt (32) is arranged in a straight line direction, and its discharging end corresponds to the position of the guiding component (4).

3. The appearance vision inspection device for a piston according to claim 2, characterized in that, The top surface of the conveyor belt (32) is flush with the top surface of the glass turntable (2), and the moving direction of the conveyor belt (32) is tangent to the outer edge of the glass turntable (2).

4. The appearance visual inspection device for a piston according to claim 3, wherein, A guiding member (34) is further arranged at the discharging end of the conveyor belt (32), and the guiding member (34) is used to guide the piston from the conveyor belt (32) towards the glass turntable (2).

5. An appearance visual inspection device for a piston according to claim 4, characterized in that, The guiding member (34) includes a guiding plate (341) fixedly arranged above the conveyor belt (32), the guiding plate (341) is strip-shaped, and one end of it extends towards the glass turntable (2) until it reaches the position of the guiding component (4).

6. The appearance vision inspection device for a piston according to claim 5, wherein, The guiding component (4) includes a lifting frame (41) arranged on the frame (1), and a guiding member (42) located above the glass turntable (2) is arranged on the lifting frame (41), and a material guiding channel (43) for the piston to pass through is formed between the guiding member (42) and the guiding plate (341).

7. The piston appearance visual inspection device according to claim 6, characterized in that, The guiding member (42) includes a connecting rod (421) connected to the lifting frame (41), and a butting block (422) is connected to the lower end of the connecting rod (421), and the butting block (422) has a disc-shaped structure.

8. An appearance visual inspection device for a piston according to claim 6, characterized in that, The guiding member (42) and the guiding plate (341) are respectively located at the upper end and the lower end of the piston.

9. The appearance visual inspection device for a piston according to claim 1, wherein, The rejecting component (6) and the discharging component (7) have the same structure, including a fixed bracket (80) arranged on the frame (1), a conveyor belt (81) is drivably arranged on the fixed bracket (80), the conveyor belt (81) is arranged in a straight line direction and is arranged towards the center of the glass turntable (2); it further includes a pushing component arranged on the fixed bracket (80), and the pushing component is arranged above the inner side of the glass turntable (2) and is used to axially move the piston towards the conveyor belt (81).

10. A piston appearance visual inspection device according to claim 9, characterized in that, The pushing component includes a cylinder (82) arranged on the fixed bracket (80), and a pushing plate (83) is arranged at the output end of the cylinder (82).

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