Defect detection equipment for cylindrical product

Abstract

The invention discloses defect detection equipment for cylindrical products. The defect detection equipment comprises a rack, a roller chain conveying line arranged on the rack, a detection mechanism arranged outside the roller chain conveying line, a feeding device and a discharging device, wherein the feeding device and the discharging device are located at the feeding end and the discharging end of the roller chain conveying line respectively. According to the scheme, the obliquely-arranged roller chain conveying line is adopted to convey products, the products are detected in a horizontal state, the detection device is suitable for detecting cylindrical products with large length-diameter ratios, the conveying stability is high, relative rotation of the products can be achieved in cooperation with the rotary driving device, no dead angle exists in detection, the rotating speed can be adjusted, the camera frame rate is increased, and the detection efficiency is improved. Therefore, the material is detected more accurately, and the influence of the depth of field and edge distortion of the camera on the detection precision is reduced. Four groups of detection stations are arranged outside the roller chain conveying line, the detection requirement is met, the number of cameras is effectively reduced, and therefore the cost of hardware is reduced.

Description

Technical Field

[0001] The present invention relates to the field of cylindrical product detection, and more specifically, to a defect detection device for cylindrical products. Background Art

[0002] There are usually two ways to inspect cylindrical products. One is to use a clamping belt to convey and inspect defects on the bottom surface, inner wall and inner bottom of the product. The rear belt sucks the bottom of the product to inspect defects on the top and outer circle (such as Figure 1 The second is to use the front belt to suck the product bottom, inner wall, inner bottom and other parts of the defect detection, the rear belt to suck the product bottom to detect the top and outer circle and other parts of the defect detection (such as Figure 2 As shown). However, the realization of these detection methods requires a prerequisite that the material can stand upright. For materials with a large aspect ratio, uneven ends of the cylinder, or through-ends of the cylinder, the above two methods cannot be used for detection. At the same time, these two detection methods require more cameras to achieve full coverage detection on the circumference of the material, which will also increase the cost a lot. Summary of the invention

[0003] The object of the present invention is to provide a defect detection device for cylindrical products to solve the technical problems existing in the above-mentioned background technology.

[0004] The technical solution of the present invention provides a defect detection device for cylindrical products, comprising a frame, a roller chain conveyor line arranged on the frame, a detection mechanism arranged outside the roller chain conveyor line, and a feeding device and a discharging device respectively located at the feeding end and the discharging end of the roller chain conveyor line;

[0005] The roller chain conveyor line is arranged at an angle, and the rollers thereon are movably arranged. A rotating conveying section is arranged on the roller chain conveyor line, and the section is provided with a rotating driving device for driving the rollers to rotate based on the roller chain conveyor line; the detection mechanism includes detection station one, detection station two, detection station three and detection station four arranged along the conveying direction, the detection station three and detection station four are arranged in the rotating conveying section, and the detection station three and detection station four are rotating detection stations.

[0006] In a preferred embodiment, a support base is provided at the bottom of the roller chain conveyor line, and the angle between the support base and the horizontal plane is 3-5°.

[0007] In a preferred embodiment, the rotary drive device includes a rotary mounting frame, a rotary drive motor, a drive wheel set and a synchronous belt. A limiting groove is provided on the rotary mounting frame, and the synchronous belt is limited by the limiting groove. A synchronous wheel is provided at one end of the roller, and the synchronous wheel is located above the synchronous belt and in contact with the synchronous belt.

[0008] In a preferred embodiment, the driving wheel assembly includes a driving wheel located in the middle and connected to the output end of the rotary driving motor, two tensioning wheels symmetrically arranged on both sides of the driving wheel, and two steering wheels located outside the two tensioning wheels.

[0009] In a preferred embodiment, the rotating conveying section is provided with a baffle, and the baffle is provided on a lower side of the rotating conveying section.

[0010] In a preferred embodiment, the feeding device includes a feeding chute and an electric material sorting brush located at the outlet of the feeding chute, the products are arranged in sequence in the feeding chute, and the electric material sorting brush is horizontally arranged and located above the roller chain conveyor line.

[0011] In a preferred embodiment, the discharging device is located after the inspection station four, and the discharging device includes a defective product collection chute and a good product collection chute, and a pneumatic rejection device is arranged on the opposite side of the defective product collection chute.

[0012] In a preferred embodiment, the inspection station 1 includes an area array camera 1 and a coaxial light source 1 located on one side of the product and an area array camera 2 and a coaxial light source 2 located on the other side of the product, wherein the area array camera 1 and the area array camera 2 are arranged opposite to each other and are coaxial with the product;

[0013] The inspection station 2 includes an area array camera 3 and a coaxial light source 3, and the area array camera 3 faces the bottom of the product and is coaxial with the product.

[0014] In a preferred embodiment, the inspection station three comprises, in sequence, an area array camera four, an area array camera five, an area array camera six and an area light source one, the area array camera four is located directly above the product, the area array camera four and the area array camera five are tilted and arranged at different angles, and both face the outer surface of the product;

[0015] The inspection station four includes area array camera seven and area array camera eight, surface light source two and surface light source three. The area array camera seven and area array camera eight are both tilted and located on different sides of the product. The area array camera seven shoots one end of the product from top to bottom, and the area array camera eight shoots the other end of the product from bottom to top.

[0016] The beneficial effects of the technical solution of the present invention are:

[0017] This solution uses an inclined roller chain conveyor line to convey products. The products are inspected in a horizontal state. It is suitable for cylindrical products with a large aspect ratio. It has high conveying stability. The relative rotation of the product can be achieved with the rotary drive device, so that there is no dead angle in the inspection. The rotation speed can be adjusted and the camera frame rate can be increased, so that the material can be inspected more accurately and the impact of camera depth of field and edge distortion on the inspection accuracy can be reduced. Four groups of inspection stations are set outside the roller chain conveyor line to meet the inspection requirements and effectively reduce the number of cameras, thereby reducing the cost of hardware. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cylindrical product detection device in the prior art.

[0019] Figure 2 It is another cylindrical product detection device in the prior art.

[0020] Figure 3 It is a schematic diagram of the overall structure of the present invention,

[0021] Figure 4 This is a schematic diagram of the interior of the frame of the present invention.

[0022] Figure 5 This is an overall schematic diagram of the roller chain conveyor line of the present invention.

[0023] Figure 6 This is a side view of the roller chain conveyor line of the present invention.

[0024] Figure 7 It is an overall schematic diagram of the rotary drive device of the present invention,

[0025] Figure 8 This is a schematic diagram of a detection station of the present invention.

[0026] Fig. 9 This is a schematic diagram of the second detection station of the present invention.

[0027] Fig.10 This is a schematic diagram of the third detection station of the present invention.

[0028] Fig.11 This is a schematic diagram of the detection station four of the present invention.

[0029] Description of the accompanying drawings: 1 frame, 2 feeding device, 21 feeding slide, 22 electric material brush, 3 roller chain conveyor line, 31 support seat, 32 roller, 33 synchronous wheel, 34 rib, 4 rotation drive device, 41 rotation mounting frame, 42 limit groove, 43 rotation drive motor, 44 driving wheel, 45 tensioning wheel, 46 steering wheel, 47 synchronous belt, 5 detection station one, 51 area array camera one, 52 coaxial light source one, 53 area Array camera 2, 54 coaxial light source 2, 6 inspection station 2, 61 area array camera 3, 62 coaxial light source 3, 7 inspection station 3, 71 area array camera 4, 72 area array camera 5, 73 area array camera 6, 74 area light source 1, 8 inspection station 4, 81 area array camera 7, 82 area array camera 8, 83 area light source 2, 84 area light source 3, 9 discharge device, 91 defective product collection chute, 92 good product collection chute, 93 pneumatic rejection device. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

[0031] like Figure 2-7 As shown, the technical solution of the present invention provides a defect detection device for cylindrical products, including a frame 1, a roller chain conveyor line 3 arranged on the frame 1, a detection mechanism arranged outside the roller chain conveyor line 3, and a feeding device 2 and a discharging device 9 respectively located at the feeding end and the discharging end of the roller chain conveyor line 3. Cylindrical products such as capacitor accessories, such as aluminum shells and other products, enter the roller chain conveyor line 3 through the feeding device 2. During the conveying process, the detection mechanism takes photos of the products in all directions, and the shooting data is transmitted to the upper unit for processing. After the inspection, qualified products and unqualified products are collected separately through the discharging device 9.

[0032] The feeding device 2 includes a feeding chute 21 and an electric material sorting brush 22 located at the outlet of the feeding chute 21. Products are arranged in sequence in the feeding chute 21. The electric material sorting brush 22 is horizontally arranged and located above the roller chain conveyor line 3. Products are buffered in the feeding chute 21, and the products enter the conveying roller chain conveyor line 3 in sequence. After entering, they are sorted by the rotating electric material sorting brush 22, so that the materials are arranged in sequence on the roller chain conveyor line 3. The electric material sorting brush 22 is a brush structure, and the material is soft, which will not cause damage to the surface of the product.

[0033] The roller chain conveyor line 3 is tilted, and the rollers 32 thereon are movably arranged. A rotating conveying section is arranged on the roller chain conveyor line 3, and the section is provided with a rotating drive device 4 for driving the rollers 32 to rotate based on the roller chain conveyor line 3. The roller chain conveyor line 3 realizes product conveying through the coordination of structures such as motors and axles. The product is located between two rollers 32. The rotating conveying section is arranged to drive the rollers 32 to rotate through the rotating drive device 4 in this section, thereby rotating the product relative to the roller chain conveyor line 3. The purpose of the rotation is to facilitate the detection mechanism to detect a circle of the product and avoid the occurrence of a detection blind spot.

[0034] The bottom of the roller chain conveyor line 3 is provided with a support seat 31, and the angle between the support seat 31 and the horizontal plane is 3-5°. The rotating conveying section is provided with a rib 34, and the baffle is provided on the lower side of the rotating conveying section. The entire roller chain conveyor line 3 is set in an inclined state, the purpose of which is to prevent the product from axially moving during the rotation process, and it is slightly inclined with an inclination angle of 3-5°, which does not affect the normal transportation of the product. At the same time, the rib 34 is provided in the rotating conveying section to prevent the product from falling during rotation.

[0035] The rotary drive device 4 includes a rotary mounting frame 41, a rotary drive motor 43, a driving wheel set and a synchronous belt 47. The rotary mounting frame 41 is provided with a limiting groove 42, and the synchronous belt 47 is limited by the limiting groove 42. A synchronous wheel 33 is provided at one end of the roller 32, and the synchronous wheel 33 is located above the synchronous belt 47 and contacts the synchronous belt 47. The driving wheel set includes a driving wheel 44 located in the middle and connected to the output end of the rotary drive motor 42, two tensioning wheels 45 symmetrically arranged on both sides of the driving wheel 44, and two steering wheels 46 located outside the two tensioning wheels 45.

[0036] In the above scheme, the rotary drive motor 43 is started, and the rotation of the synchronous belt 47 is realized by the cooperation of the driving wheel group. Because the synchronous wheel 33 cooperates with the synchronous belt 47, the rotation of the synchronous belt 47 realizes the rotation of the synchronous wheel 33, and then realizes the rotation of the roller 32. The synchronous belt 47 is limited by the limit groove 42 to avoid displacement. According to the detection requirements, some rollers 32 can be rotated by changing the length of the synchronous belt 47. At the same time, according to the diameter of the material, the rotation speed of the rotary drive motor 43 can be accurately controlled.

[0037] The detection mechanism includes detection station 1 5, detection station 2 6, detection station 3 7 and detection station 4 8 arranged along the conveying direction, and the detection station 3 7 and detection station 4 8 are arranged in the rotating conveying section, and the detection station 3 7 and detection station 4 8 are rotating detection stations. At the detection station 1 5 and the detection station 2 6, the product will not rotate relative to the roller chain conveyor line 3, and the detection station 3 7 and the detection station 4 8 are rotating detection.

[0038] The inspection station 1 5 includes an array camera 1 51 and a coaxial light source 1 52 located on one side of the product, and an array camera 2 53 and a coaxial light source 2 54 located on the other side of the product. The array camera 1 51 and the array camera 2 53 are arranged opposite to each other and are coaxial with the product. Taking the aluminum shell inspection as an example, the inspection station 1 5 mainly inspects the shell end face and the shell mouth. The array camera 1 51 is matched with the coaxial light source 1 52 and is distributed on one side of the aluminum shell. The explosion-proof pass, scratches, double punching, oil spots, and explosion-proof missed punching are detected by coaxial light diffuse reflection; the array camera 2 53 is matched with the coaxial light source 2 54 and is distributed on one side of the product. The flat shell and mixed material (diameter) are detected by coaxial light diffuse reflection.

[0039] The inspection station 2 6 includes an array camera 3 61 and a coaxial light source 3 62. The array camera 3 61 faces the bottom of the product and is coaxial with the product. The inspection station 2 6 is mainly used to inspect the bottom of the shell. The array camera 3 61 and the coaxial light source 3 62 are matched and distributed on one side of the aluminum shell to detect the inner bottom scratches through the diffuse reflection of the coaxial light.

[0040] The inspection station three 7 includes a surface array camera four 71, a surface array camera five 72, a surface array camera six 73 and a surface light source one 74. The surface array camera four 71 is located directly above the product. The surface array camera four 71 and the surface array camera five 72 are tilted and set at different angles, and both face the outer surface of the product. The inspection station three 7 detects the defects of the cylindrical surface under different reflection angles by mirror reflection, specifically: lack of material at the mouth, cracks at the mouth (obvious defects), notches at the mouth, depressions, holes, dirt; cracks at the mouth (obvious defects), notches at the mouth, holes. This station is a rotating station, and the camera uses multiple frames to shoot defects at different positions of the cylindrical surface.

[0041] The inspection station four 8 includes an area array camera seven 81 and an area array camera eight 82, a surface light source two 83 and a surface light source three 84. The area array camera seven 81 and the area array camera eight 82 are both tilted and located on different sides of the product. The area array camera seven 81 shoots one end of the product from top to bottom, and the area array camera eight 82 shoots the other end of the product from bottom to top. The area array camera seven 81 is matched with the surface light source two 83 to detect defects on the inner wall of the mouth, specifically: internal drawing and cracks. The area array camera eight 82 is matched with the surface light source three 84 to detect end face and R corner defects through mirror reflection, specifically: scratches, R edge damage, bottom scars. This station is a rotating station, and the camera uses multiple frames to shoot defects in different positions in a circle.

[0042] The above four inspection stations inspect different parts of the product in turn, take pictures with cameras, process and analyze the images through the upper unit, and make defect judgments, wherein the image processing and analysis are implemented using existing technical solutions, the cameras, light sources, etc. are existing, and the camera models, light source models, etc. are selected as needed. After defect detection, the discharging device 9 collects the unqualified products and qualified products in different lanes.

[0043] The discharging device 9 is located after the inspection station four 8, and the discharging device 9 includes a defective product collection chute 91 and a good product collection chute 92. A pneumatic rejection device 93 is arranged on the opposite side of the defective product collection chute 91. The pneumatic rejection device 93 adopts a pneumatic valve structure to blow the defective products into the defective product collection chute 91, and the good products continue to be transported forward into the good product collection chute 92.

[0044] This solution uses an inclined roller chain conveyor line 3 to convey products. The products are inspected in a horizontal state. It is suitable for cylindrical products with a large aspect ratio. It has high conveying stability. The relative rotation of the product can be achieved with the rotary drive device 4, so that there is no dead angle in the inspection. The rotation speed can be adjusted and the camera frame rate can be increased, so that the material can be inspected more accurately and the impact of the camera depth of field and edge distortion on the inspection accuracy can be reduced. Four groups of inspection stations are set outside the roller chain conveyor line 3 to meet the inspection requirements and effectively reduce the number of cameras, thereby reducing the cost of hardware.

[0045] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A defect detection device for cylindrical products, characterized in that: It comprises a frame, a roller chain conveyor line arranged on the frame, a detection mechanism arranged outside the roller chain conveyor line, and a feeding device and a discharging device respectively located at the feeding end and the discharging end of the roller chain conveyor line; The roller chain conveyor line is arranged at an angle, and the rollers thereon are movably arranged. A rotating conveying section is arranged on the roller chain conveyor line, and the section is provided with a rotating driving device for driving the rollers to rotate based on the roller chain conveyor line; the detection mechanism includes detection station one, detection station two, detection station three and detection station four arranged along the conveying direction, the detection station three and detection station four are arranged in the rotating conveying section, and the detection station three and detection station four are rotating detection stations.

2. A cylindrical product defect detection device according to claim 1, characterized in that: A support seat is provided at the bottom of the roller chain conveyor line, and the angle between the support seat and the horizontal plane is 3-5°.

3. The defect detection device for cylindrical products according to claim 1, characterized in that: The rotary drive device includes a rotary mounting frame, a rotary drive motor, a drive wheel set and a synchronous belt. The rotary mounting frame is provided with a limiting groove, and the synchronous belt is limited by the limiting groove. A synchronous wheel is provided at one end of the roller, and the synchronous wheel is located above the synchronous belt and contacts the synchronous belt.

4. A cylindrical product defect detection device according to claim 3, characterized in that: The driving wheel set includes a driving wheel located in the middle and connected to the output end of the rotary driving motor, two tensioning wheels symmetrically arranged on both sides of the driving wheel, and two steering wheels located outside the two tensioning wheels.

5. The defect detection device for cylindrical products according to claim 1, characterized in that: The rotating conveying section is provided with a rib, and the baffle is arranged on a lower side of the rotating conveying section.

6. The defect detection device for cylindrical products according to claim 1, characterized in that: The feeding device includes a feeding chute and an electric material sorting brush located at the outlet of the feeding chute. Products are arranged in sequence in the feeding chute. The electric material sorting brush is horizontally arranged and located above the roller chain conveyor line.

7. The defect detection device for cylindrical products according to claim 1, characterized in that: The discharging device is located after the inspection station four, and the discharging device includes a defective product collection chute and a good product collection chute. A pneumatic rejection device is arranged on the opposite side of the defective product collection chute.

8. The defect detection device for cylindrical products according to claim 1, characterized in that: The inspection station 1 includes an area array camera 1 and a coaxial light source 1 located on one side of the product and an area array camera 2 and a coaxial light source 2 located on the other side of the product. The area array camera 1 and the area array camera 2 are arranged opposite to each other and are coaxial with the product. The inspection station 2 includes an area array camera 3 and a coaxial light source 3, and the area array camera 3 faces the bottom of the product and is coaxial with the product.

9. The defect detection device for cylindrical products according to claim 1, characterized in that: The inspection station three includes, in sequence, an area array camera four, an area array camera five, an area array camera six and an area light source one. The area array camera four is located directly above the product. The area array camera four and the area array camera five are tilted and arranged at different angles, and both face the outer surface of the product. The inspection station four includes area array camera seven and area array camera eight, surface light source two and surface light source three. The area array camera seven and area array camera eight are both tilted and located on different sides of the product. The area array camera seven shoots one end of the product from top to bottom, and the area array camera eight shoots the other end of the product from bottom to top.

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