A rubber ring coating quality detection device

Abstract

The utility model discloses a kind of rubber ring coating quality detection equipment, it is related to detection technical field, including rack, positioning fixture, conveying device, three-axis manipulator, line-scan camera and image recognition detection module.Rack is equipped with detection station;Conveying device is used to convey positioning fixture from back to front, to make positioning fixture can be moved to detection station;The output end of three-axis manipulator is connected with first rotary drive part;Line-scan camera is connected with the output end of first rotary drive part, three-axis manipulator can drive line-scan camera moves to the above of positioning fixture at detection station, first rotary drive part is used to drive line-scan camera rotates in horizontal direction, to make line-scan camera along the circumferential direction of workpiece rubber ring and take photograph to rubber ring.The rubber ring coating quality detection equipment has dispensed with the cumbersome step that operator naked eye observes rubber ring appearance in manual detection mode, auxiliary caliper carries out sampling measurement, it is favorable to improve the detection efficiency and detection accuracy of rubber ring.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to a device for testing the quality of rubber ring coating. Background Technology

[0002] The adhesive application process is a key step in workpiece assembly. Its core purpose is to form a rubber ring by applying a specific type of adhesive to predetermined areas of the workpiece. This achieves functions such as sealing, bonding, corrosion protection, and shock absorption at the workpiece connection points, thereby ensuring the structural stability, sealing reliability, and service life of the assembled workpiece. After the adhesive application process is completed, the quality of the rubber ring coating, such as its integrity, thickness uniformity, and the presence of defects such as glue breaks, overflow, and bubbles, directly affects the final performance of the workpiece. In existing technologies, the inspection of the rubber rings coated on the workpiece is mostly done manually. That is, operators visually observe the appearance of the rubber ring and use simple tools such as calipers to sample and measure the dimensions of the rubber ring to determine whether it meets the preset standards. This manual inspection method is not only inefficient and difficult to adapt to the high-efficiency inspection requirements of mass production, but the inspection results are also easily affected by subjective factors such as the operator's experience, resulting in poor inspection accuracy. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a device for inspecting the quality of adhesive ring coatings, which is beneficial to improving the inspection efficiency and accuracy of adhesive rings.

[0004] The rubber ring coating quality inspection equipment according to an embodiment of the present invention includes a frame with an inspection station; a positioning fixture for positioning the workpiece; a conveying device disposed on the frame, the conveying device being used to convey the positioning fixture from back to front so that the positioning fixture can move to the inspection station; a three-axis robot disposed on the frame, the output end of the three-axis robot being connected to a first rotary drive; a line scan camera connected to the output end of the first rotary drive, the three-axis robot being able to drive the line scan camera to move to above the positioning fixture at the inspection station, the first rotary drive being used to drive the line scan camera to rotate in the horizontal direction so that the line scan camera can capture images of the rubber ring along the circumference of the rubber ring on the workpiece; and an image recognition detection module electrically connected to the line scan camera.

[0005] It has at least the following beneficial effects: When inspecting the rubber ring coated on a workpiece, the operator first places the workpiece on a positioning fixture to position it. Next, the operator places the positioning fixture carrying the workpiece on a conveyor, which then smoothly transports it from back to front to the inspection station. Once the positioning fixture arrives at the inspection station, the three-axis robot on the frame adjusts its trajectory according to the positioning reference of the inspection station. The robot then drives the first rotary drive unit and the line scan camera connected to its output end to move to the preset shooting position above the positioning fixture, aligning the line scan camera with the workpiece. The rubber ring area is then activated. Subsequently, the first rotary drive unit starts and drives the line scan camera to rotate at a constant speed in the horizontal direction, and the line scan camera simultaneously starts its shooting function. During the rotation of the line scan camera, the line scan camera performs continuous line scans along the circumference of the rubber ring on the workpiece to ensure that the line scan camera can completely cover the entire circumference of the rubber ring. During the shooting process, the line scan camera transmits the captured rubber ring image data to the image recognition and detection module. After receiving the data, the image recognition and detection module identifies, analyzes and judges the integrity, thickness uniformity and the presence of defects such as broken glue, overflow glue, and bubbles in the rubber ring, thereby completing the detection of the rubber ring coating quality.

[0006] This rubber ring coating quality inspection equipment eliminates the tedious steps of manual inspection, which requires operators to visually inspect the appearance of the rubber ring and use calipers for sampling measurements. It does not rely on the operator's experience and judgment, effectively avoiding inspection errors caused by the operator's subjective factors, improving the inspection accuracy of the rubber ring. At the same time, it eliminates the inefficient process of manual inspection of each piece and greatly improves the inspection efficiency of the rubber ring to meet the high-efficiency requirements of mass production.

[0007] The rubber ring coating quality inspection device according to an embodiment of the present invention further includes a second rotary drive member, the second rotary drive member being connected to the output end of the first rotary drive member, the output end of the second rotary drive member being connected to the line scan camera, and the second rotary drive member being used to drive the line scan camera to rotate in the vertical direction.

[0008] According to the rubber ring coating quality inspection equipment of this utility model embodiment, the first rotary drive component is a first rotary cylinder, the cylinder body of the first rotary cylinder is connected to the output end of the three-axis manipulator, and the rotation shaft of the first rotary cylinder is connected to the second rotary drive component.

[0009] According to the rubber ring coating quality inspection device of this utility model embodiment, the second rotary drive component is a second rotary cylinder, the cylinder body of the second rotary cylinder is connected to the rotary shaft of the first rotary cylinder, and the rotary shaft of the second rotary cylinder is connected to the line scan camera.

[0010] According to the embodiment of the present utility model, the rubber ring coating quality inspection equipment includes two belt conveyor mechanisms. Both belt conveyor mechanisms are mounted on the frame and are parallel to the front-back direction. The two belt conveyor mechanisms abut against the left and right sides of the lower surface of the positioning fixture, so that the two belt conveyor mechanisms can transport the positioning fixture from back to front.

[0011] According to the rubber ring coating quality inspection equipment of the present utility model embodiment, the conveying device further includes a limiting mechanism, which is disposed on the frame and is used to stop the positioning fixture at the inspection station.

[0012] According to the rubber ring coating quality inspection equipment of this utility model embodiment, the limiting mechanism includes a limiting cylinder. The cylinder body of the limiting cylinder is disposed on the frame. The piston rod of the limiting cylinder can extend and abut against the positioning fixture, so that the positioning fixture stays at the inspection station.

[0013] According to the rubber ring coating quality inspection equipment of this utility model embodiment, the limiting mechanism includes two limiting cylinders. The piston rods of the two limiting cylinders can extend above the two belt conveyor mechanisms respectively and abut against the left and right sides of the positioning fixture, so that the positioning fixture stays at the inspection station.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the rubber ring coating quality inspection equipment according to an embodiment of this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a structural schematic diagram of the line scan camera, the first rotary drive component, and the second rotary drive component; Icon labels: Conveying device 100; belt conveyor mechanism 110; positioning fixture 120; Three-axis robotic arm 200; first rotary drive 210; second rotary drive 220; Line scan camera 300; Frame 400; Inspection station 410. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0018] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0019] refer to Figure 1 and Figure 3 This utility model discloses a rubber ring coating quality inspection device, including a frame 400, a positioning fixture 120, a conveying device 100, a three-axis robot 200, a line scan camera 300, and an image recognition and detection module. The frame 400 is equipped with a detection station 410; a positioning fixture 120 is used to position the workpiece; a conveying device 100 is mounted on the frame 400 and is used to convey the positioning fixture 120 from back to front so that the positioning fixture 120 can move to the detection station 410; a three-axis robot 200 is mounted on the frame 400 and the output end of the three-axis robot 200 is connected to a first rotary drive 210; a line scan camera 300 is connected to the output end of the first rotary drive 210, and the three-axis robot 200 can drive the line scan camera 300 to move to the position above the positioning fixture 120 at the detection station 410. The first rotary drive 210 is used to drive the line scan camera 300 to rotate in the horizontal direction so that the line scan camera 300 can take pictures of the rubber ring along the circumference of the rubber ring on the workpiece; an image recognition detection module is electrically connected to the line scan camera 300.

[0020] Understandably, when inspecting the rubber ring coated on a workpiece, the operator first places the workpiece to be inspected on the positioning fixture 120, allowing the fixture 120 to position the workpiece. Next, the operator places the positioning fixture 120 carrying the workpiece on the conveying device 100, which then smoothly transports the fixture 120 from back to front to the inspection station 410. After the positioning fixture 120 arrives at the inspection station 410, the three-axis robot 200 on the frame 400 adjusts its trajectory according to the positioning reference of the inspection station 410. The three-axis robot 200 drives the first rotary drive 210 and the line scan camera 300 connected to its output end to move to the preset shooting position above the positioning fixture 120. The camera 300 is positioned so that it is aligned with the rubber ring area on the workpiece. Then, the first rotary drive 210 is activated, causing the camera 300 to rotate at a constant speed in the horizontal direction, and the camera 300 simultaneously activates its imaging function. During the rotation of the camera 300, it continuously scans the rubber ring along its circumference to ensure complete coverage of the entire circumference. During the imaging process, the camera transmits the captured rubber ring image data to the image recognition and detection module. Upon receiving the data, the module identifies, analyzes, and judges the integrity, thickness uniformity, and presence of defects such as broken glue, overflow glue, and bubbles in the rubber ring, thereby completing the inspection of the rubber ring coating quality. This rubber ring coating quality inspection equipment eliminates the tedious steps of manual inspection, which requires operators to visually inspect the appearance of the rubber ring and use calipers for sampling measurements. It does not rely on the operator's experience and judgment, effectively avoiding inspection errors caused by the operator's subjective factors, improving the inspection accuracy of the rubber ring. At the same time, it eliminates the inefficient process of manual inspection of each piece and greatly improves the inspection efficiency of the rubber ring to meet the high-efficiency requirements of mass production.

[0021] It should be explained that the line scan camera 300 is an imager that continuously acquires images of a target object through line-by-line scanning. The line scan camera 300 can coordinate with motion trajectories to achieve complete image capture of the rubber ring. The image recognition and detection module is a signal processing module used in conjunction with the line scan camera 300. This module receives image data transmitted from the line scan camera 300 and automatically identifies, analyzes, and judges target features in the image (such as the rubber ring's contour, thickness, and defect marks) using a preset algorithm, outputting a detection result indicating whether it meets preset standards. Both the line scan camera 300 and the image recognition and detection module are common components in the field of visual inspection, and will not be elaborated further here.

[0022] refer to Figure 3The rubber ring coating quality inspection equipment also includes a second rotary drive 220, which is connected to the output end of the first rotary drive 210. The output end of the second rotary drive 220 is connected to the line scan camera 300, and the second rotary drive 220 is used to drive the line scan camera 300 to rotate vertically. It can be understood that after the positioning fixture 120 moves to the inspection station 410, the three-axis robot 200 drives the first rotary drive 210, the connected second rotary drive 220, and the line scan camera 300 to move above the positioning fixture 120. The first rotary drive 210 drives the line scan camera 300 to rotate horizontally, so that the line scan camera 300 takes pictures along the circumference of the rubber ring. At the same time, the second rotary drive 220 drives the line scan camera 300 to rotate vertically according to the actual curved surface shape of the rubber ring to adjust the shooting angle, ensuring that the lens of the line scan camera 300 is always facing the surface of the rubber ring. The images continuously acquired by the line scan camera 300 are transmitted in real time to the image recognition and detection module to complete the inspection. Since the second rotary drive 220 can drive the line scan camera 300 to rotate in the vertical direction, the line scan camera 300 can flexibly adjust the shooting angle according to the complex shape of the rubber ring on the workpiece. This avoids image distortion or loss of detail caused by the rubber ring not being perpendicular to the lens of the line scan camera 300 when rotating only horizontally. As a result, the line scan camera 300 can acquire a clearer and more complete image of the rubber ring, which in turn allows the image recognition and detection module to more accurately judge the integrity, thickness uniformity and various defects of the rubber ring. Therefore, it is beneficial to improve the detection accuracy of the rubber ring.

[0023] In one embodiment of this utility model, both the first rotary drive 210 and the second rotary drive 220 can be common motors. In a preferred embodiment, the first rotary drive 210 is a first rotary cylinder, with its cylinder body connected to the output end of the three-axis robot 200, and its rotation shaft connected to the second rotary drive 220. The second rotary drive 220 is a second rotary cylinder, with its cylinder body connected to the rotation shaft of the first rotary cylinder, and its rotation shaft connected to the line scan camera 300. A rotary cylinder is a common pneumatic actuator that converts the pressure energy of compressed air into rotational mechanical energy, and will not be further elaborated upon here. In this utility model, the axis of the first rotary cylinder's rotation shaft is parallel to the vertical direction, and the axis of the second rotary cylinder's rotation shaft is parallel to the horizontal direction.

[0024] In this invention, the three-axis robot 200 can drive the first rotary drive 210, the second rotary drive 220 and the line scan camera 300 to move in the front-back, left-right and up-down directions. The three-axis robot 200 is a common drive device, which will not be described in detail here.

[0025] As one embodiment of this utility model, the rubber ring coating quality inspection equipment further includes a mounting plate and a linear drive component. The mounting plate is connected to the second rotary drive component 220, and the linear drive component is disposed on the mounting plate. The output end of the linear drive component is connected to the line scan camera 300, which is slidably connected to the mounting plate. The linear drive component can drive the line scan camera 300 to move, so that the distance between the line scan camera 300 and the rotation axis of the first rotary cylinder can be adjusted. The mounting plate is also provided with an air blowing mechanism for blowing away dust from the lens of the line scan camera 300. It can be understood that the rotation axis of the first rotary cylinder is the central axis of the horizontal rotation of the line scan camera 300 for shooting, and the distance between the rotation axis of the first rotary cylinder and the line scan camera 300 corresponds to the radial distance when the line scan camera 300 shoots the rubber ring. A linear drive unit is mounted on a mounting plate connected to the second rotary drive unit 220. The output end of the linear drive unit is connected to a line scan camera 300 slidably connected to the mounting plate. The linear drive unit can drive the line scan camera 300 to move, allowing the distance between the line scan camera 300 and the rotating shaft of the first rotary cylinder to be adjustable. By adjusting this distance, it can accommodate workpiece rubber rings of different diameters, ensuring that the line scan camera 300 is always at the optimal shooting radial distance matching the rubber ring. This avoids problems such as loss of image details and distortion caused by shooting distances that are too close or too far due to different rubber ring diameters. This ensures that the rubber ring image acquired by the line scan camera 300 is always clear and complete, providing a guarantee for the accurate analysis of the image recognition and detection module. This not only improves the detection accuracy of the rubber ring but also enhances the applicability of the rubber ring coating quality inspection equipment. In this embodiment, the line scan camera 300 is connected to the mounting plate via a slide rail slider, allowing the line scan camera 300 to slide. The linear drive unit can be a common screw and nut drive assembly, which will not be further described here.

[0026] Understandably, the blowing mechanism blows a directional airflow onto the lens surface of the line scan camera 300 before each shot to quickly remove dust and impurities adhering to the lens surface, thus preventing impurities from interfering with the imaging quality of the line scan camera 300 and ensuring that the rubber ring image acquired by the line scan camera 300 is clear, which helps to improve the detection accuracy of the rubber ring.

[0027] refer to Figure 1 and Figure 2The conveying device 100 includes two belt conveyor mechanisms 110, both mounted on the frame 400. Both belt conveyor mechanisms 110 are parallel to the front-to-back direction and abut against the left and right sides of the lower surface of the positioning fixture 120, respectively, so that the two belt conveyor mechanisms 110 can transport the positioning fixture 120 from back to front. Understandably, when inspecting the rubber ring coated on a workpiece, the operator first places the workpiece to be inspected on the positioning fixture 120, allowing the positioning fixture 120 to position the workpiece. Then, the operator places the positioning fixture 120 carrying the workpiece on the rear end of the two belt conveyor mechanisms 110. The two belt conveyor mechanisms 110 abut against the left and right sides of the lower surface of the positioning fixture 120 and operate synchronously, smoothly transporting the positioning fixture 120 from back to front at a stable speed until the positioning fixture 120 carrying the workpiece is transported to the preset inspection station 410 on the frame 400. The belt conveyor mechanism 110 is a common mechanism used for conveying materials, and will not be described in further detail here.

[0028] In this invention, the conveying device 100 further includes a limiting mechanism (not shown in the figure), which is mounted on the frame 400 and is used to stop the positioning fixture 120 at the inspection station 410. The limiting mechanism includes a limiting cylinder, the cylinder body of which is mounted on the frame 400, and the piston rod of which can extend and abut against the positioning fixture 120 to stop the positioning fixture 120 at the inspection station 410. When inspecting the rubber ring coated on a workpiece, the operator first places the workpiece to be inspected on the positioning fixture 120, allowing the fixture 120 to position the workpiece. Next, the operator places the positioning fixture 120 carrying the workpiece on the rear end of two belt conveyor mechanisms 110. The two belt conveyor mechanisms 110 start synchronously and transport the positioning fixture 120 from back to front. Before the positioning fixture 120 reaches the inspection station 410, the limit cylinder is activated, and its piston rod extends outward above the belt conveyor mechanism 110. When the positioning fixture 120 moves to the inspection station 410... At 0 o'clock, the piston rod of the limit cylinder abuts against the positioning fixture 120 on the belt conveyor mechanism 110; under the limiting action of the piston rod of the limit cylinder, the positioning fixture 120 is accurately and stably stopped at the inspection station 410, so that the subsequent line scan camera 300 shooting and image recognition detection module analysis can be carried out smoothly; after the inspection is completed, the piston rod of the limit cylinder retracts, releasing the limit on the positioning fixture 120, and the two belt conveyor mechanisms 110 continue to operate, transporting the positioning fixture 120 carrying the inspected workpiece to the front end, so that the positioning fixture 120 carrying the workpiece can enter the downstream processing equipment.

[0029] Understandably, when the positioning fixture 120 moves from back to front under the drive of the belt conveyor mechanism 110, it will generate inertia due to the movement. If the limiting is not timely, the positioning fixture 120 may overshoot the detection station 410 or cause a positional shift. Before the positioning fixture 120 reaches the detection station 410, the piston rod of the limiting cylinder has already extended. When the positioning fixture 120 reaches the detection station 410, the piston rod of the limiting cylinder can abut against the positioning fixture 120, offsetting the impact force brought by inertia, ensuring that the positioning fixture 120 accurately stops at the detection station 410, and avoiding the position of the positioning fixture 120 shifting due to inertia. This provides a reliable benchmark for the line scan camera 300 to accurately align with the rubber ring and stably shoot along the circumference.

[0030] The limiting mechanism includes two limiting cylinders. The piston rods of the two limiting cylinders can extend above the two belt conveyor mechanisms 110 respectively and abut against the left and right sides of the positioning fixture 120 so that the positioning fixture 120 stops at the inspection station 410. Understandably, the piston rods of the two limiting cylinders extend above the two belt conveyor mechanisms 110 and abut against the left and right sides of the positioning fixture 120. The piston rods of the two limiting cylinders can form a bidirectional limiting effect on the positioning fixture 120 from the left and right directions, preventing the positioning fixture 120 from shifting in the left and right directions due to factors such as slight belt shaking, workpiece placement deviation, or inertial impact when it moves on the belt conveyor mechanism 110. On the other hand, the abutting force of the piston rods on the left and right sides can be balanced to prevent the positioning fixture 120 from tilting due to unilateral force, ensuring the stability of the positioning fixture 120 on the inspection station 410. This avoids incomplete imaging range, angle deviation, or image distortion of the rubber ring due to the left and right displacement of the positioning fixture 120 when the line scan camera 300 takes pictures, thus ensuring that the image recognition and detection module can analyze based on a complete and accurate rubber ring image, which is beneficial to improving the detection accuracy of the rubber ring.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A device for inspecting the quality of adhesive ring coating, characterized in that, include: The frame (400) is equipped with a testing station (410). Positioning fixture (120) is used to position the workpiece; A conveying device (100) is provided on the frame (400). The conveying device (100) is used to convey the positioning fixture (120) from back to front so that the positioning fixture (120) can be moved to the inspection station (410). A three-axis robot (200) is mounted on the frame (400), and the output end of the three-axis robot (200) is connected to a first rotary drive (210). A line scan camera (300) is connected to the output end of the first rotary drive (210). The three-axis robot (200) can drive the line scan camera (300) to move to the position fixture (120) above the detection station (410). The first rotary drive (210) is used to drive the line scan camera (300) to rotate in the horizontal direction so that the line scan camera (300) can take pictures of the rubber ring along the circumference of the rubber ring on the workpiece. The image recognition and detection module is electrically connected to the line scan camera (300).

2. The equipment for detecting the coating quality of rubber rings according to claim 1, characterized in that: It also includes a second rotary drive (220), which is connected to the output end of the first rotary drive (210). The output end of the second rotary drive (220) is connected to the line scan camera (300). The second rotary drive (220) is used to drive the line scan camera (300) to rotate in the vertical direction.

3. The equipment for detecting the coating quality of rubber rings according to claim 2, characterized in that: The first rotary drive (210) is a first rotary cylinder. The cylinder body of the first rotary cylinder is connected to the output end of the three-axis manipulator (200), and the rotary shaft of the first rotary cylinder is connected to the second rotary drive (220).

4. The adhesive ring coating quality inspection equipment according to claim 3, characterized in that: The second rotary drive (220) is a second rotary cylinder. The cylinder body of the second rotary cylinder is connected to the rotary shaft of the first rotary cylinder, and the rotary shaft of the second rotary cylinder is connected to the line scan camera (300).

5. The equipment for detecting the coating quality of rubber rings according to claim 1, characterized in that: The conveying device (100) includes two belt conveyor mechanisms (110), both of which are mounted on the frame (400). Both belt conveyor mechanisms (110) are parallel to the front-back direction. The two belt conveyor mechanisms (110) abut against the left and right sides of the lower surface of the positioning fixture (120) respectively, so that the two belt conveyor mechanisms (110) can convey the positioning fixture (120) from back to front.

6. The adhesive ring coating quality inspection equipment according to claim 5, characterized in that: The conveying device (100) also includes a limiting mechanism, which is disposed on the frame (400) and is used to keep the positioning fixture (120) at the inspection station (410).

7. The adhesive ring coating quality inspection equipment according to claim 6, characterized in that: The limiting mechanism includes a limiting cylinder, the cylinder body of which is mounted on the frame (400), and the piston rod of which can extend and abut against the positioning fixture (120) so that the positioning fixture (120) stays at the detection station (410).

8. The adhesive ring coating quality inspection equipment according to claim 7, characterized in that: The limiting mechanism includes two limiting cylinders, and the piston rods of the two limiting cylinders can extend above the two belt conveyor mechanisms (110) and abut against the left and right sides of the positioning fixture (120) so that the positioning fixture (120) stays at the detection station (410).

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