A full-automatic detection device for appearance of ring rubber oil seal

Abstract

The application discloses a kind of full-automatic detection device for the appearance of annular rubber oil seal, including feeding conveyor, bottom surface detection device, grabbing camera assembly, protractor, surface testing device, two groups of angle detection devices, two groups of size detection devices and good product and defective product collection device;Bottom surface detection device completes workpiece bottom surface defect preliminary inspection;Grabbing camera assembly is positioned with six-axis manipulator by industrial camera vision, realizes workpiece accurate grabbing transfer;Protractor drives workpiece to pass each detection station in turn, surface testing device accurately identifies surface tiny defect, angle detection device detects key angle parameter, and size detection device acquires size data and compares with standard parameter;Finally, collection device completes the automatic sorting of qualified and unqualified workpieces.The device integrates full-process automation function, detection covers comprehensively, precision is reliable, and adaptability is strong, can greatly improve detection efficiency, reduce labor cost, meet the detection needs of industrialized mass production.

Description

Technical Field

[0001] This invention belongs to the field of oil seal inspection technology, specifically relating to a fully automatic inspection device for the appearance of annular rubber oil seals. Background Technology

[0002] As a key sealing component in mechanical transmission systems, the appearance quality and dimensional accuracy of annular rubber oil seals directly affect sealing performance and service life. If there are defects such as surface scratches, missing materials, deformation, or out-of-tolerance dimensions or angles, it can easily lead to equipment oil leakage, malfunctions, or even safety accidents.

[0003] Currently, the appearance inspection of ring rubber oil seals in China mostly relies on manual labor. Manual inspection is not only inefficient and unable to meet the inspection needs of large-scale production, but also subject to subjective factors such as the experience and fatigue of the inspectors, resulting in unstable inspection accuracy and the occurrence of missed or false inspections, leading to unqualified products entering the market. Some companies use semi-automated inspection equipment, but this equipment suffers from problems such as incomplete inspection coverage, low automation, and the need for manual assistance in loading, unloading, and sorting. It still cannot completely solve the pain points of high dependence on manual labor and insufficient inspection efficiency and accuracy.

[0004] Therefore, developing a fully automated inspection device for the appearance of annular rubber oil seals with a high degree of automation, comprehensive inspection coverage, and reliable accuracy has become a technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0005] The purpose of this invention is to provide a fully automatic inspection device for the appearance of annular rubber oil seals, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic inspection device for the appearance of annular rubber oil seals, comprising a feeding and conveying device, a bottom surface inspection device, a gripping camera assembly, an indexer, a surface testing device, an angle inspection device, a first dimension inspection device, an angle inspection device, a second dimension inspection device, a good product collection device, and a defective product collection device.

[0007] An indexer is provided at the discharge end of the feeding conveyor, and a bottom surface detection device and a gripping camera assembly are provided between the feeding conveyor and the indexer to complete the bottom surface detection and precise gripping and transfer of the workpiece to be inspected.

[0008] The indexer is provided with a surface testing device, an angle detection device, a first dimension detection device, another angle detection device, a second dimension detection device, a good product collection device, and a defective product collection device arranged clockwise. The indexer drives the workpiece to be tested to pass through the corresponding workstations of each device in sequence, so as to realize continuous testing and sorting.

[0009] Preferably, a brush module, a flow plate module, and a guide baffle are sequentially provided on the feeding belt of the feeding conveyor. The brush module is used to remove impurities attached to the surface of the workpiece, the flow plate module is used to adjust the workpiece conveying density, and the guide baffle is used to limit the workpiece conveying path to ensure that the workpieces are conveyed in an orderly manner.

[0010] Preferably, the gripping camera assembly 3 includes a mechanical gripping actuator and an industrial camera vision mechanism. The industrial camera vision mechanism includes a mounting bracket on which an industrial camera, a light source, and a trigger sensor are mounted. The trigger sensor is used to detect the workpiece position and trigger the industrial camera to acquire images. The industrial camera and the light source work together to achieve workpiece positioning and recognition, providing accurate positioning data for the mechanical gripping actuator.

[0011] Preferably, the mechanical gripping actuator is a six-axis manipulator with multi-degree-of-freedom motion capability, which can realize the smooth and precise transfer of workpieces between different workstations.

[0012] Preferably, the indexer is provided with multiple detection stations, each including a drive wheel, a driven wheel, a drive motor, and an electric magnet. When the indexer rotates to a designated position, the drive motor starts and drives the drive wheel to rotate through the electric magnet. The drive wheel drives the driven wheel to rotate synchronously, thereby causing the workpiece to be inspected, placed on the glass plate on the upper end of the driven wheel, to rotate at a uniform speed, ensuring that the detection device can perform full-circumference detection of the workpiece without blind spots.

[0013] Preferably, the surface testing device includes a camera, a miniature industrial lens, and a test light source assembly. The miniature industrial lens is detachably connected to the front end of the camera, has a focal length of 8-12mm, a working distance of 10-30mm, and is adapted to the illumination range of the miniature ring light source of the test light source assembly, thereby achieving precise imaging of the miniature assembly and ensuring the accuracy of surface defect detection.

[0014] Preferably, the first size detection device and the second size detection device include a size detection unit and a collaborative control unit. The size detection unit is used to collect the size feature data of the workpiece to be detected. The collaborative control unit is signal-connected to the size detection unit and compares the collected size feature data with preset standard size parameters to complete the size detection of the workpiece.

[0015] Preferably, the size detection unit includes an industrial camera, a high-magnification microscope lens, and a supplementary light source. The industrial camera has a resolution of no less than 8 million pixels, the high-magnification microscope lens has a magnification adjustable in the range of 10-50 times, and the supplementary light source is a ring-shaped shadowless light source, which can provide a uniform and stable lighting environment, effectively eliminate shadow interference during the detection process, and ensure the accuracy of size measurement data.

[0016] Preferably, both the good product collection device and the defective product collection device consist of a dual-axis repeating type cylinder with guide rod and a material collection device. The dual-axis repeating type cylinder with guide rod is used to control the opening and closing and position switching of the material collection box. When the detection result is a good product, the cylinder of the good product collection device is activated, causing the workpiece to fall into the corresponding material collection box. When the detection result is a defective product, the cylinder of the defective product collection device is activated, realizing the separate collection of defective products and ensuring the accuracy and efficiency of sorting.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. High degree of automation: This device integrates fully automated functions for feeding, inspection and sorting. From workpiece feeding, bottom surface inspection, multi-dimensional inspection to final sorting and collection, no manual intervention is required, which greatly reduces the dependence on manual labor, improves inspection efficiency and can meet the inspection needs of industrial mass production.

[0019] 2. Comprehensive Inspection Coverage: Through the coordinated operation of the bottom surface inspection device, surface testing device, two sets of angle inspection devices, and two sets of size inspection devices, the bottom surface and surface defects of the annular rubber oil seal, as well as the angle and size accuracy, are inspected in all aspects, avoiding the problem of missed inspections caused by a single inspection dimension and ensuring product quality.

[0020] 3. Reliable Detection Accuracy: The surface testing device adopts a highly adaptable miniature industrial lens and a dedicated light source, while the dimensional detection device is equipped with a high-pixel industrial camera, an adjustable high-magnification microscope lens, and a ring-shaped shadowless light source. Combined with the workpiece rotation detection design, it effectively eliminates detection interference and ensures the accuracy of defect identification and parameter measurement. The collaborative control unit compares the detection data with standard parameters in real time, further ensuring the reliability of the detection results.

[0021] 4. High adaptability: The high magnification of the microscope lens of the size detection device is adjustable, and the structural design of the angle detection and surface detection devices is compatible with different specifications of annular rubber oil seals, which can flexibly meet the detection needs of a variety of products and has strong versatility. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a partial structural schematic diagram of the feeding and conveying device of the present invention;

[0024] Figure 3 is a schematic diagram of the structure of the camera grasping assembly of the present invention;

[0025] Figure 4 is a schematic diagram of the indexing device detection station structure of the present invention;

[0026] Figure 5 is a schematic diagram of the size detection device of the present invention;

[0027] In the diagram: 1 - Feeding and conveying device, 101 - Brush module, 102 - Flow plate module, 103 - Guide baffle; 2 - Bottom surface detection device; 3 - Grasping camera assembly, 301 - Mechanical gripping actuator, 302 - Mounting bracket, 303 - Industrial camera, 304 - Light source, 305 - Trigger sensor; 4 - Indexer, 41 - Drive wheel, 42 - Driven wheel, 43 - Drive motor, 44 - Electromagnetic sensor; 5 - Surface testing device, 51 - Camera, 52 - Miniature industrial lens, 53 - Test light source assembly; 7 - First angle detection device; 8 - First size detection device, 81 - Industrial camera, 82 - High-magnification microscope lens, 83 - Supplementary light source; 9 - Second angle detection device; 10 - Second size detection device; 11 - Good product collection device; 12 - Defective product collection device, 121 - Dual-axis reciprocating cylinder with guide rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] As shown in Figures 1-5, a fully automatic inspection device for the appearance of annular rubber oil seals includes a feeding and conveying device 1, a bottom surface inspection device 2, a gripping camera assembly 3, an indexer 4, a surface testing device 5, a first angle inspection device 7, a first dimension inspection device 8, a second angle inspection device 9, a second dimension inspection device 10, a good product collection device 11, and a defective product collection device 12.

[0030] In this embodiment, the feeding belt of the feeding conveyor 1 is a food-grade conveyor belt to ensure that the workpiece is not contaminated during the conveying process. The brush module 101 is made of soft nylon brush to avoid scratching the surface of the workpiece. The flow plate module 102 is driven by a cylinder to adjust the opening and closing angle of the flow plate to achieve stepless adjustment of the conveying density. The guide baffle 103 is made of wear-resistant polyurethane material and has an arc-shaped guide surface on the inner side to ensure that the workpiece is conveyed smoothly.

[0031] The bottom surface inspection device 2 uses a combination of an industrial camera and a ring light source. The industrial camera has a resolution of 5 million pixels and is installed at a height of 200 mm from the surface of the feeding belt. It can clearly capture images of the bottom surface of the workpiece and identify whether there are defects such as missing material, scratches, and impurities on the bottom surface through image algorithms. The inspection results are transmitted to the control system in real time.

[0032] The mechanical gripping actuator 301 of the gripping camera assembly 3 adopts a six-axis robot with a repeatability of ±0.02mm, ensuring the accuracy of workpiece gripping and transfer. The industrial camera 303 has a resolution of 8 megapixels, the light source 304 adopts a white ring light source, and the trigger sensor 305 is a photoelectric sensor. When the workpiece reaches the designated position, the trigger sensor 305 sends a signal to the control system. The control system starts the industrial camera 303 to acquire images, determines the center position and posture of the workpiece through image recognition algorithms, and then controls the six-axis robot to accurately grip the workpiece and transfer it to the detection station of the indexer 4.

[0033] The indexer 4 has 12 evenly distributed detection stations, which can meet the cycle time requirements of continuous detection. Each inspection station includes a drive wheel 41, a driven wheel 42, a drive motor 43, and an electromagnetic magnet 44. Both the drive wheel 41 and the driven wheel 42 are made of rubber and have a diameter of 50mm. The center distance between them can be adjusted according to the workpiece size, with an adjustment range of 80-150mm. The electromagnetic magnet 44 has a magnetic force of 50N and is controlled by electromagnetic means to engage and disengage with the drive wheel 41. When the indexer 4 rotates to the designated inspection station, the electromagnetic magnet 44 is energized and engages the drive wheel 41. The drive motor 43 starts and drives the drive wheel 41 to rotate. The drive wheel 41 drives the driven wheel 42 to rotate synchronously through a circular transmission belt, thereby causing the workpiece to be inspected, placed on the glass tray on the upper end of the driven wheel 42, to rotate at a uniform speed. The rotation speed is set to 10r / min to ensure that each inspection device has sufficient time to complete the full circumference inspection of the workpiece without blind spots. The glass tray is made of 5mm thick optical glass with a light transmittance of ≥95%, which does not affect the relevant inspections on the bottom surface. The surface is smooth and flat, reducing the frictional resistance when the workpiece rotates.

[0034] The surface testing device 5 has a camera 51 with a resolution of 12 million pixels, a miniature industrial lens 52 with a focal length of 10mm and a working distance of 20mm, and a miniature ring light source in the test light source assembly 53 with a blue LED light source and adjustable brightness. The camera 51 collects surface images of the workpiece during its rotation, and the image algorithm identifies surface defects such as scratches, missing material, bubbles, and deformation. The defect identification accuracy can reach 0.05mm.

[0035] The first angle detection device 7 and the second angle detection device 9 have the same structure, both using laser angle sensors with a measurement range of 0-360° and a measurement accuracy of ±0.1°. They are used to detect the end face tilt angle and the concentricity angle of the inner and outer rings of the workpiece, respectively. During detection, the workpiece rotates at a constant speed, and the laser angle sensor collects angle data in real time, comparing it with preset standard angle parameters to determine whether it is qualified. For detailed composition of this device, please refer to application number: CN202511312193.9, which will not be elaborated here.

[0036] The double-axis repeating type cylinder 121 with guide rod of the good product collection device 11 and the defective product collection device 12 has a stroke of 100mm and an adjustable action speed of 0.1-0.5m / s. The collection box is made of transparent acrylic material, which makes it easy to observe the collection situation. The bottom of the collection box is equipped with a buffer pad to prevent the workpiece from being damaged when it falls.

[0037] Workflow:

[0038] Feeding stage: The ring rubber oil seals to be tested are placed in batches into the feed end of the feeding conveyor 1. The device is started and the feeding belt of the feeding conveyor 1 drives the workpiece forward. The brush module 101 removes impurities from the surface of the workpiece, the flow plate module 102 adjusts the conveying density of the workpiece, and the guide baffle 103 limits the conveying path. The workpieces are conveyed in an orderly manner.

[0039] Bottom surface inspection stage: When the workpiece passes through the bottom surface inspection device 2, the industrial camera captures the bottom surface image, and the image algorithm identifies bottom surface defects. If the inspection fails, the control system records the workpiece information, and the subsequent gripping camera assembly 3 does not grip the workpiece. The unqualified workpiece is transported to the end waste collection box with the feeder belt; if the inspection passes, the workpiece continues to be transported to the gripping position.

[0040] Grab and transfer stage: After the trigger sensor 305 detects a qualified workpiece, the industrial camera 303 acquires the workpiece image and completes the positioning. The control system controls the six-axis robot to grab the workpiece and transfer it to the empty inspection station of the indexer 4.

[0041] Multi-dimensional inspection stage: The indexer 4 rotates, causing the workpieces to sequentially enter each inspection station:

[0042] (1) Surface inspection station: The surface testing device 5 collects surface images of the workpiece during the rotation process, identifies surface defects, and transmits the test results to the control system;

[0043] (2) First angle detection station: The first angle detection device 7 detects the tilt angle of the workpiece end face and transmits the detection result to the control system;

[0044] (3) First dimension detection station: The first dimension detection device 8 collects the inner and outer diameter data of the workpiece, compares them with the standard parameters, and transmits the results to the control system;

[0045] (4) Second angle detection station: The second angle detection device 9 detects the concentric angle of the inner and outer rings of the workpiece, and the detection result is transmitted to the control system;

[0046] (5) Second dimension detection station: The second dimension detection device 10 collects the workpiece thickness dimension data, compares it with the standard parameters, and transmits the results to the control system.

[0047] Sorting and Collection Stage: Indexer 4 rotates all inspected workpieces to the collection station. The control system summarizes all inspection results and determines whether the workpiece is a good product.

[0048] (1) If it is a good product, the control system controls the action of the double-axis repeating type cylinder 121 with guide rod of the good product collection device 11, and the workpiece falls into the good product collection box.

[0049] (2) If it is a defective product, the control system controls the action of the double-axis repeating type cylinder 121 with guide rod of the defective product collection device 12, and the workpiece falls into the defective product collection box.

[0050] Cyclic operation: The indexer 4 continues to rotate, the empty inspection station enters the gripping position, and the above workflow is repeated to achieve continuous inspection.

[0051] The applicant further declares that while the above embodiments illustrate the implementation method and apparatus structure of the present invention, the present invention is not limited to the above-described embodiments, meaning that the present invention must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent substitutions for the selected implementation methods, additions to steps, and selections of specific methods all fall within the protection and disclosure scope of the present invention.

[0052] This invention is not limited to the above-described embodiments. All methods that employ similar structures and approaches to achieve the objectives of this invention are within the scope of protection of this invention.

Claims

1. A fully automatic inspection device for the appearance of annular rubber oil seals, characterized in that: It includes a feeding conveyor (1), a bottom surface detection device (2), a gripping camera assembly (3), an indexer (4), a surface testing device (5), an angle detection device (7), a first dimension detection device (8), an angle detection device (9), a second dimension detection device (10), a good product collection device (11), and a defective product collection device (12). A separator (4) is provided at the discharge end of the feeding conveyor (1). A bottom surface detection device (2) and a gripping camera assembly (3) are provided between the feeding conveyor (1) and the separator (4) to complete the bottom surface detection and precise gripping and transfer of the workpiece to be inspected. The indexer (4) is provided with a surface testing device (5), an angle detection device (7), a first dimension detection device (8), an angle detection device (9), a second dimension detection device (10), a good product collection device (11), and a defective product collection device (12) arranged clockwise. The indexer (4) drives the workpiece to be tested to pass through the corresponding workstations of each device in sequence.

2. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: A brush module (101), a flow plate module (102), and a guide baffle (103) are sequentially arranged on the feeding belt of the feeding conveyor (1).

3. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: The gripping camera assembly (3) includes a mechanical gripping actuator (301) and an industrial camera vision mechanism. The industrial camera vision mechanism includes a mounting bracket (302), on which an industrial camera (303), a light source (304), and a trigger sensor (305) are mounted. The trigger sensor (305) is used to detect the position of the workpiece and trigger the industrial camera (303) to acquire images.

4. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 3, characterized in that: The mechanical gripping actuator (301) is a six-axis manipulator.

5. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: The indexer (4) is provided with multiple detection stations, each including a drive wheel (41), a driven wheel (42), a drive motor (43), and an electric magnet (44). When the indexer (4) rotates to the designated position, the drive motor (43) starts and drives the drive wheel (41) to rotate through the electric magnet (44). The drive wheel (41) drives the driven wheel (42) to rotate synchronously, thereby causing the workpiece to be tested, placed on the glass plate at the upper end of the driven wheel (42), to rotate at a uniform speed, ensuring that the detection device can perform a full-circumference detection of the workpiece without dead angles.

6. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: The surface testing device (5) includes a camera (51), a miniature industrial lens (52), and a test light source assembly (53). The miniature industrial lens (52) is detachably connected to the front end of the camera (51). Its focal length is 8-12mm, and its working distance is 10-30mm. It is adapted to the illumination range of the miniature ring light source of the test light source assembly to achieve accurate imaging of the miniature assembly.

7. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: The first size detection device (8) and the second size detection device (10) include a size detection unit and a collaborative control unit. The size detection unit is used to collect the size feature data of the workpiece to be detected. The collaborative control unit is signal-connected to the size detection unit and compares the collected size feature data with the preset standard size parameters to complete the size detection of the workpiece.

8. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 7, characterized in that: The size detection unit includes an industrial camera (81), a high-magnification microscope lens (82), and a supplementary light source (83). The industrial camera has a resolution of no less than 8 million pixels. The magnification of the high-magnification microscope lens (82) can be adjusted within the range of 10-50 times. The supplementary light source (83) is a ring-shaped shadowless light source.

9. The fully automatic inspection device for the appearance of annular rubber oil seals according to claim 1, characterized in that: Both the good product collection device (11) and the defective product collection device (12) consist of a double-axis reciprocating type cylinder with guide rod (121) and a material collection device.

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