Easily-opened cover rivet damage detection device

Abstract

The utility model belongs to the technical field of detection equipment, and particularly relates to an easy-to-open cover rivet damage detection device which comprises a conveying mechanism, a bracket and a detection mechanism, the conveying mechanism comprises a conveying belt, and cover positioning holes used for supporting an easy-to-open cover are formed in the conveying belt; the detection mechanism comprises a camera and a processor, and the camera is in communication connection with the processor; the camera is fixedly installed on the bracket, the conveying belt is in sliding connection with the bracket, and the camera is matched with the cover positioning hole; the detection mechanism further comprises a light source and a light source installation seat, the light source installation seat is fixedly installed on the bracket, and the light source and the camera are both fixedly installed on the light source installation seat. The utility model aims to avoid the problems of damage and missing detection of the rivet of the easy-open cover, reduce the labor intensity of production, improve the production efficiency and ensure the production quality.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, specifically relating to an easy-open rivet damage detection device. Background Technology

[0002] Easy-open lids are metal packaging products with pull-tabs used to seal canned goods. They are typically made of aluminum or tinplate and consist of a lid and a pull-tab riveted together. Easy-open lids, when used with food cans, form the packaging container for canned food. To consume the canned food, simply pull the pull tab and tear the lid to open the can and eat the contents. To ensure the safety of canned food, canning containers must be hygienic and non-toxic, have good sealing properties, be corrosion-resistant, and be easy to access.

[0003] The manufacturing process of easy-open lids is relatively complex, involving: blanking, basic lid stamping, edge rolling (rounding), glue injection, bubble forming, ring forming, riveting, and shaping. The bubble forming stage involves creating a rivet on the lid surface, and the riveting stage involves fitting the formed pull ring hole onto the rivet on the lid, thus riveting the pull ring onto the lid. During the bubble forming and riveting processes, impurities in the material or areas of thinness can easily tear the rivet head, resulting in poor sealing and causing mold growth on the canned food, rendering it inedible.

[0004] Traditional methods for detecting rivet damage involve manual sampling during the production process. If any rivet damage is detected, the entire batch of products is isolated and inspected individually to identify the cause of the damage and implement improvements. However, due to the uncertainty of manual inspection and the limitations of sampling, this method still carries the risk of missed detections and is labor-intensive and inefficient. Utility Model Content

[0005] The purpose of this invention is to provide an easy-open rivet damage detection device to avoid the problem of missed detection of easy-open rivet damage, reduce labor intensity, improve production efficiency, and ensure production quality.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for detecting rivet damage to easy-open lids includes a conveying mechanism, a bracket, and a detection mechanism. The conveying mechanism includes a conveyor belt with lid positioning holes for supporting the easy-open lid. The detection mechanism includes a camera and a processor, with the camera communicatively connected to the processor. The camera is fixedly mounted on the bracket, the conveyor belt is slidably connected to the bracket, and the camera is matched with the lid positioning holes.

[0008] In this technical solution, the easy-open cover is intermittently conveyed forward on the cover positioning hole of the conveyor belt. During the conveying process, the relative position of the easy-open cover and the conveyor belt remains unchanged. When the easy-open cover is conveyed directly below the camera, the camera takes a picture of the easy-open cover located on the cover positioning hole, and then transmits the picture to the processor. The processor has a reference image of a normal easy-open cover stored in advance. The processor compares the picture with the reference image and calculates the grayscale difference between the two images. If the grayscale difference exceeds a set threshold of pixels, the processor counts the proportion of pixels to the total image size. If it exceeds the limit, it is determined that the easy-open cover has rivet damage. The processor can then transmit a signal to the subsequent rejection mechanism to remove the damaged easy-open cover. The entire detection of rivet damage in easy-open covers can be completed in one go, which not only avoids the problem of missed detection of rivet damage in easy-open covers, but also reduces the labor intensity of production, improves production efficiency, and ensures production quality.

[0009] Furthermore, the detection mechanism also includes a light source and a light source mounting base. The light source mounting base is fixedly mounted on the bracket, and both the light source and the camera are fixedly mounted on the light source mounting base. The addition of a light source in this technical solution allows the camera to take clearer pictures of the easy-open covers on the conveyor belt, improving the accuracy of the processor in determining rivet damage.

[0010] Furthermore, the light source mounting base includes an upper mounting base and a lower mounting base. The upper mounting base is fixedly mounted on the bracket, and the lower mounting base is detachably connected to the upper mounting base. This design allows for easier removal of the light source or camera by simply detaching the lower mounting base from the upper mounting base.

[0011] Furthermore, both the upper and lower mounting bases are provided with interconnected first through holes, and the bottom of the bracket has a second through hole that matches the first through hole. The camera lens passes through the first and second through holes and aims at the cover positioning hole when the conveyor belt is running. With this configuration, the camera lens can take pictures of the easy-open cover located on the cover positioning hole through the first and second through holes.

[0012] Furthermore, the bracket has a first groove along the conveyor belt's conveying direction on the side near the conveyor belt. The conveyor belt slides on the first groove, with both sides of the conveyor belt clearance-fitting the two inner sides of the first groove, and the bottom side of the conveyor belt clearance-fitting the bottom surface of the first groove. This design, when conveying easy-open covers, utilizes the first groove to limit the conveyor belt's movement, resulting in smoother conveying, preventing deviation, and allowing for more comprehensive and clearer camera imaging, further improving the processor's accuracy in detecting rivet damage.

[0013] Furthermore, a second groove is formed at the bottom of the first groove, and a third through hole is formed in the second groove; a negative pressure cylinder is installed on the side of the bracket away from the second groove, and a negative pressure connector is provided at the negative pressure end. In this technical solution, the negative pressure connector can be connected to an external negative pressure fan to evacuate the negative pressure cylinder; when the conveyor belt slides in the first groove of the bracket, the cavity between the conveyor belt and the second groove will also become a negative pressure state due to the connection of the third through hole; under the suction effect of the negative pressure, the easy-open cover can fit more tightly on the cover positioning hole of the conveyor belt, avoiding light transmission when the camera takes pictures, which would increase the gray area of ​​the captured image and affect the accuracy of rivet damage detection.

[0014] Furthermore, the detection device also includes a position detector, which is mounted on the bracket and is communicatively connected to the processor. When the easy-open cover is conveyed above the camera, the position detector detects it and transmits a signal to the processor, which then transmits the signal to the camera. The camera takes a picture of the easy-open cover located on the cover positioning hole and finally transmits the captured image back to the processor.

[0015] The utility model adopting the above technical solution has the following advantages:

[0016] This utility model's easy-open lid rivet damage detection device involves the easy-open lid being intermittently conveyed forward on a conveyor belt, positioned at the lid positioning hole. During this conveying process, the relative position of the easy-open lid and the conveyor belt remains constant. When the easy-open lid reaches below the camera, a position detector detects the signal and transmits it to a processor. The processor then transmits the signal to the camera, which takes a picture of the easy-open lid positioned at the lid positioning hole. Finally, the captured image is transmitted back to the processor. The processor stores a reference image of a normal easy-open lid beforehand. The processor compares the captured image with the reference image and calculates the grayscale difference between the two images. If the grayscale difference exceeds a set threshold of pixels, the processor calculates the proportion of pixels in the total image size. If the difference exceeds the threshold, the easy-open lid is determined to have rivet damage. The processor then transmits a signal to a subsequent rejection mechanism to remove the damaged easy-open lid. The entire rivet damage detection process can be completed in one operation, avoiding missed detections of rivet damage, reducing labor intensity, improving production efficiency, and ensuring production quality. Attached Figure Description

[0017] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the easy-open rivet damage detection device of this utility model. Figure 1 ;

[0019] Figure 2This is a schematic diagram of the structure of an embodiment of the easy-open rivet damage detection device of this utility model. Figure 2 ;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of a testing institution;

[0021] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0022] Figure 5 for Figure 1 A schematic diagram of the structure of the middle bracket.

[0023] The symbols for the main components are explained below:

[0024] 1. Conveyor belt, 2. Cover positioning hole, 3. Bracket, 4. Camera, 5. Light source, 6. Upper mounting base, 7. Lower mounting base, 8. First through hole, 9. Second through hole, 10. First groove, 11. Second groove, 12. Third through hole, 13. Negative pressure cylinder, 14. Negative pressure connector, 15. Easy-open cover. Detailed Implementation

[0025] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. Furthermore, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0026] This embodiment provides an easy-open rivet damage detection device, such as... Figure 1 and Figure 2 As shown, the system includes a conveying mechanism, a bracket 3, and a detection mechanism. The conveying mechanism includes a conveyor belt 1 and two rollers (not shown in the figure). The conveyor belt 1 is tautly fitted onto the rollers. The conveyor belt 1 has several cover positioning holes 2 for supporting the easy-open cover 15. In this embodiment, the cover positioning holes 2 are arranged in two rows. The detection mechanism includes a camera 4, a light source 5, a light source mounting base, a position detector, and a processor. The light source 5, the position detector, and the camera 4 are all communicatively connected to the processor. The position detector and the camera 4 are fixedly mounted on the bracket 3. The conveyor belt 1 is slidably connected to the bracket 3. The camera 4 is matched with the cover positioning holes 2, that is, when the cover positioning hole 2 on the conveyor belt 1 is above the camera 4, the lens of the camera 4 is exactly aligned with the easy-open cover 15 placed on the cover positioning hole 2.

[0027] For ease of disassembly and installation, such as Figure 3 and Figure 4As shown, the light source mounting base in this embodiment includes an upper mounting base 6 and a lower mounting base 7. The upper mounting base 6 is fixedly mounted on the bracket 3 by bolts, and the lower mounting base 7 is detachably connected to the upper mounting base 6 by bolts. The light source 5 and the camera 4 are both fixedly mounted on the lower mounting base 7 by screws. Both the upper mounting base 6 and the lower mounting base 7 are provided with interconnected first through holes 8. The bottom of the bracket 3 is provided with a second through hole 9 that matches the first through hole 8. The lens light of the camera 4 passes through the first through hole 8 and the second through hole 9 and is aimed at the cover positioning hole 2 when the conveyor belt 1 is running. In this way, the lens of the camera 4 can take pictures of the easy-open cover 15 located on the cover positioning hole 2 through the first through hole 8 and the second through hole 9.

[0028] like Figure 5 As shown, the bracket 3 has a first groove 10 on the side near the conveyor belt 1 along the conveying direction of the conveyor belt 1. The conveyor belt 1 is slidably mounted on the first groove 10. The two sides of the conveyor belt 1 are clearance-fitted with the two inner sides of the first groove 10, and the bottom side of the conveyor belt 1 is clearance-fitted with the bottom surface of the first groove 10. When the conveyor belt 1 is conveying the easy-open cover 15, the first groove 10 limits the conveyor belt 1, making the conveying of the conveyor belt 1 more stable and preventing deviation. The camera 4 takes more comprehensive and clearer pictures, improving the accuracy of the processor in judging rivet damage. A second groove 11 is opened at the bottom of the first groove 10, and a third through hole 12 is opened in the second groove 11. A negative pressure cylinder 13 is installed on the side of the bracket 3 away from the second groove 11, and a negative pressure connector 14 is provided at the negative pressure end. The negative pressure connector 14 can be connected to an external negative pressure fan to evacuate the negative pressure cylinder 13. When the conveyor belt 1 slides in the first groove 10 of the bracket 3, the cavity between the conveyor belt 1 and the second groove 11 will also become a negative pressure state due to the connection of the third through hole 12. Under the suction of the negative pressure, the easy-open cover 15 can fit more tightly on the cover positioning hole 2 of the conveyor belt 1, preventing light from passing through when the camera 4 takes pictures, which would increase the gray area of ​​the captured image and affect the accuracy of rivet damage detection.

[0029] The usage process of the easy-open cap rivet damage detection device in this embodiment is as follows:

[0030] In this embodiment of the easy-open cover rivet damage detection device, the negative pressure connector 14 can be connected to an external negative pressure fan to evacuate the negative pressure cylinder 13; when the conveyor belt 1 slides in the first groove 10 of the bracket 3, the cavity between the conveyor belt 1 and the second groove 11 will also become a negative pressure state because of the connection of the third through hole 12; under the suction of the negative pressure, the easy-open cover 15 can fit more tightly on the cover positioning hole 2 of the conveyor belt 1.

[0031] The easy-open cover 15 is intermittently conveyed forward on the cover positioning hole 2 of the conveyor belt 1. During the conveying process, the relative position of the easy-open cover 15 and the conveyor belt 1 remains unchanged. When the easy-open cover 15 is conveyed to the area below the camera 4, the position detector detects the signal and transmits it to the processor. The processor then transmits the signal to the camera 4. The lens of the camera 4 takes a picture of the easy-open cover 15 located on the cover positioning hole 2. Finally, the picture is transmitted to the processor. The processor has a reference image of a normal easy-open cover 15 stored in advance. The processor compares the picture with the reference image and calculates the grayscale difference between the two images. If the grayscale difference exceeds a set threshold of pixels, the processor counts the proportion of pixels to the total image size. If the difference exceeds the limit, it is determined that the easy-open cover 15 has rivet damage. The processor can then transmit the signal to the subsequent rejection mechanism to reject the damaged easy-open cover 15. The entire detection of rivet damage in the easy-open cover 15 can be completed in one go, which not only avoids the problem of missed detection of rivet damage in the easy-open cover 15, but also reduces the labor intensity of production, improves production efficiency, and ensures production quality.

[0032] It should be noted that the processor in this application compares images captured by the camera to identify easy-open covers with broken rivets. This kind of technology uses existing image comparison technology, and this application has not improved upon it. Therefore, the specific identification method will not be described in detail in this application.

[0033] The above provides a detailed description of the easy-open rivet damage detection device provided by this utility model. The specific embodiments are described only to help understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A device for detecting rivet breakage in an easy-open lid, characterized in that: The device includes a conveying mechanism, a bracket, and a detection mechanism. The conveying mechanism includes a conveyor belt with a lid positioning hole for supporting the easy-open lid. The detection mechanism includes a camera and a processor, with the camera and processor being communicatively connected. The camera is fixedly mounted on the bracket, and the conveyor belt is slidably connected to the bracket. The camera is matched with the lid positioning hole.

2. The easy-open rivet damage detection device according to claim 1, characterized in that: The detection mechanism also includes a light source and a light source mounting base. The light source mounting base is fixedly mounted on the bracket, and both the light source and the camera are fixedly mounted on the light source mounting base.

3. The easy-open rivet damage detection device according to claim 2, characterized in that: The light source mounting base includes an upper mounting base and a lower mounting base. The upper mounting base is fixedly mounted on the bracket, and the lower mounting base is detachably connected to the upper mounting base.

4. The easy-open rivet damage detection device according to claim 3, characterized in that: Both the upper and lower mounting bases are provided with interconnected first through holes, and the bottom of the bracket is provided with a second through hole that matches the first through hole. The lens light of the camera passes through the first and second through holes and is aligned with the cover positioning hole when the conveyor belt is running.

5. The easy-open rivet damage detection device according to claim 1, characterized in that: The bracket has a first groove on the side near the conveyor belt, which is in the conveying direction of the conveyor belt. The conveyor belt is slidably disposed on the first groove. The two sides of the conveyor belt are in clearance fit with the two inner sides of the first groove, and the bottom side of the conveyor belt is in clearance fit with the bottom surface of the first groove.

6. The easy-open rivet damage detection device according to claim 5, characterized in that: A second groove is formed at the bottom of the first groove, and a third through hole is formed in the second groove; a negative pressure cylinder is installed on the side of the bracket away from the second groove, and a negative pressure connector is provided at the negative pressure end.

7. The easy-open rivet damage detection device according to claim 1, characterized in that: The detection device also includes a position detector, which is mounted on a bracket and is communicatively connected to the processor.

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