Defect detection equipment for cylindrical product

Abstract

The utility model 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 utility model relates to the field of cylindrical product detection, more specifically, to a cylindrical product defect detection equipment. BACKGROUND

[0002] Cylindrical product detection usually adopts two ways, one is to adopt clamping belt to convey and detect the defects of product bottom, inner wall and inner bottom, and the rear belt sucks the product bottom to detect the defects of top and outer circle (as shown in Figure 1 ). The other is to adopt front belt to detect the defects of product bottom, inner wall and inner bottom, and the rear belt sucks the product bottom to detect the defects of top and outer circle (as shown in Figure 2 ). But whether these detection methods can be realized needs a prerequisite that the material can stand straight, and the above two ways cannot be adopted to detect the material with large length-diameter ratio, uneven ends or through ends. Meanwhile, the two detection methods need more cameras to achieve full coverage detection on the material circumference, and the cost will also increase a lot. INVENTION CONTENTS

[0003] The utility model aims at providing a cylindrical product defect detection equipment to solve the technical problems in the above background technology.

[0004] The utility model technical scheme provides a cylindrical product defect detection equipment, which comprises a rack, a roller chain conveying line arranged on the rack, a detection mechanism arranged outside the roller chain conveying line, an inlet device and an outlet device respectively arranged at the inlet end and the outlet end of the roller chain conveying line;

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

[0006] In a preferred embodiment, the roller chain conveying line is provided with a support seat at the bottom, and the included angle between the support seat and the horizontal plane is 3-5°.

[0007] In a preferred embodiment, the rotating driving device comprises a rotating mounting frame, a rotating driving motor, a driving wheel set and a synchronous belt. Limiting grooves are arranged on the rotating mounting frame, and the synchronous belt is limited by the limiting grooves. The rollers are provided with synchronous wheels at one end, and the synchronous wheels are located above the synchronous belt and in contact with the synchronous belt.

[0008] In a preferred embodiment, the driving wheel set comprises a driving wheel located in the middle and connected with the output end of the rotating 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 arranged on the low side of the rotating conveying section.

[0010] In a preferred embodiment, the feeding device comprises a feeding chute and an electric tidying brush arranged at the outlet of the feeding chute, products are arranged in sequence in the feeding chute, and the electric tidying brush is horizontally arranged above the roller chain conveying line.

[0011] In a preferred embodiment, the discharging device is located after the fourth detection station, and the discharging device comprises a defective product collecting chute and a good product collecting chute, and the opposite sides of the defective product collecting chute are provided with pneumatic rejecting devices.

[0012] In a preferred embodiment, the first detection station comprises a first area array camera located on one side of the product, a first coaxial light source, a second area array camera located on the other side of the product, and a second coaxial light source, the first area array camera and the second area array camera are oppositely arranged and coaxial with the product.

[0013] The second detection station comprises a third area array camera and a third coaxial light source, and the third area array camera faces the bottom of the product and is coaxial with the product.

[0014] In a preferred embodiment, the third detection station comprises a fourth area array camera, a fifth area array camera, a sixth area array camera, and a first area light source, the fourth area array camera is located directly above the product, the fifth area array camera and the sixth area camera are both obliquely arranged and have different angles, and both of them face the outer surface of the product.

[0015] The fourth detection station comprises a seventh area array camera and an eighth area array camera, a second area light source and a third area light source, the seventh area array camera and the eighth area camera are both obliquely arranged, and are located on different sides of the product, respectively, and the seventh area array camera shoots one end of the product from top to bottom, and the eighth area array camera shoots the other end of the product from bottom to top.

[0016] The beneficial effects of the technical scheme of the utility model are as follows:

[0017] The scheme adopts the obliquely arranged roller chain conveying line to convey the product, the product is detected in the horizontal state, is suitable for the detection of the cylindrical product with large length-diameter ratio, has high conveying stability, cooperates with the rotary driving device to realize the relative rotation of the product, makes the detection have no dead angle, and the rotation speed can be adjusted, the camera frame rate is improved, so that the material is more accurately detected, and the influence of the camera depth of field and edge distortion on the detection accuracy is reduced.Four groups of detection stations are arranged outside the roller chain conveying line, the detection requirements are met, the number of cameras is effectively reduced, and the cost of hardware is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The cylindrical product detection equipment in the prior art,

[0019] Figure 2 Another cylindrical product detection equipment in the prior art,

[0020] Figure 3 It is a whole structure schematic view of the utility model,

[0021] Figure 4 It is a schematic view of the utility model rack inside,

[0022] Figure 5 It is a whole schematic view of the utility model roller chain conveying line,

[0023] Figure 6 It is a side view of the utility model roller chain conveying line,

[0024] Figure 7 It is a whole schematic view of the utility model rotary driving device,

[0025] Figure 8 It is a schematic view of the utility model detection station one,

[0026] Figure 9 It is a schematic view of the utility model detection station two,

[0027] Figure 10 It is a schematic view of the utility model detection station three,

[0028] Figure 11 It is a schematic view of the utility model detection station four.

[0029] Explanation of reference signs: 1 rack, 2 feeding device, 21 feeding chute, 22 electric material arranging brush, 3 roller chain conveying line, 31 supporting seat, 32 roller, 33 synchronous wheel, 34 baffle, 4 rotary driving device, 41 rotary mounting frame, 42 limiting groove, 43 rotary driving 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 two, 54 coaxial light source two, 6 detection station two, 61 area array camera three, 62 coaxial light source three, 7 detection station three, 71 area array camera four, 72 area array camera five, 73 area array camera six, 74 area light source one, 8 detection station four, 81 area array camera seven, 82 area array camera eight, 83 area light source two, 84 area light source three, 9 discharging device, 91 defective product collecting chute, 92 good product collecting chute, 93 pneumatic removing device. DETAILED DESCRIPTION

[0030] The utility model will be explained in further detail below, the embodiment of the utility model is given for example and description, and is not exhaustive or limit the utility model to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The embodiment is selected and described to better illustrate the principle and practical application of the utility model, and enable those skilled in the art to understand the utility model to design various embodiments with various modifications suitable for specific purposes.

[0031] As Figures 2-7 The utility model technical scheme provides a cylindrical product's defect detection equipment, including rack 1, the roller chain conveying line 3 being arranged on rack 1, the detection mechanism being arranged outside roller chain conveying line 3, feeding device 2 and discharging device 9 located at the feeding end and the discharging end of roller chain conveying line 3 respectively. Cylindrical product such as the accessory of capacitor, such as aluminum shell and so on product, enters roller chain conveying line 3 through feeding device 2, and the product is detected all-round by detection mechanism in the conveying process, and the shooting data is transmitted to the host computer group and is handled, and the qualified product and the unqualified product after detection are collected separately through discharging device 9.

[0032] The feeding device 2 includes the feeding chute 21 and the electric material arranging brush 22 located at the outlet of the feeding chute 21, the products are arranged in sequence in the feeding chute 21, and the electric material arranging brush 22 is horizontally arranged and located above the roller chain conveying line 3. The products are buffered in the feeding chute 21, the products enter the conveying roller chain conveying line 3 in sequence, and are arranged on the roller chain conveying line 3 after being arranged by the rotating electric material arranging brush 22, the electric material arranging brush 22 is a brush structure, and is soft in material, so as not to cause damage to the product surface.

[0033] The roller chain conveying line 3 is arranged obliquely, and the rollers 32 are movably arranged on the roller chain conveying line 3. The roller chain conveying line 3 is provided with a rotating conveying section, which is provided with rotating driving devices 4 for driving the rollers 32 to rotate based on the roller chain conveying line 3. The roller chain conveying line 3 is used for product conveying through cooperation of a motor, an axle and other structures. The product is located between two rollers 32. The rotating conveying section is arranged to drive the rollers 32 to rotate through the rotating driving devices 4, so that the product rotates relative to the roller chain conveying line 3. The purpose of rotation is to facilitate detection of the product by a detection mechanism, and to avoid detection dead angles.

[0034] The roller chain conveying line 3 is provided with a support seat 31 at the bottom, and the included angle between the support seat 31 and a horizontal plane is 3-5°. The rotating conveying section is provided with a baffle 34 arranged at a low side of the rotating conveying section. The entire roller chain conveying line 3 is arranged in an inclined state, which is used to prevent the product from moving axially during rotation, and slightly inclined at an angle of 3-5°, which does not affect normal conveying of the product. The baffle 34 is arranged at the rotating conveying section to prevent the product from falling during rotation.

[0035] The rotating driving devices 4 include rotating mounting frames 41, rotating driving motors 43, driving wheel sets and synchronous belts 47. The rotating mounting frames 41 are provided with limiting grooves 42. The synchronous belts 47 are limited by the limiting grooves 42. One end of each roller 32 is provided with a synchronous wheel 33 located above the synchronous belt 47 and in contact with the synchronous belt 47. The driving wheel set includes a driving wheel 44 located at the middle and connected to an output end of the rotating driving motor 42, two tensioning wheels 45 symmetrically arranged at both sides of the driving wheel 44, and two steering wheels 46 located at the outer sides of the two tensioning wheels 45.

[0036] In the above scheme, the rotating driving motor 43 is started to drive the synchronous belt 47 to rotate through cooperation of the driving wheel set. Since the synchronous wheel 33 cooperates with the synchronous belt 47, rotation of the synchronous belt 47 drives the synchronous wheel 33 to rotate, and then drives the roller 32 to rotate. The synchronous belt 47 is limited by the limiting grooves 42 to avoid displacement. According to detection requirements, the length of the synchronous belt 47 can be changed to rotate some rollers 32. Meanwhile, the rotating speed of the material can be accurately controlled according to the diameter of the material and the rotating speed of the rotating driving motor 43.

[0037] The detection mechanism includes detection stations one 5, two 6, three 7 and four 8 arranged along the conveying direction. The detection stations three 7 and four 8 are arranged at the rotating conveying section, and are rotating detection stations. The product does not rotate relative to the roller chain conveying line 3 at the detection stations one 5 and two 6, and is rotated for detection at the detection stations three 7 and four 8.

[0038] The detection station one 5 includes a face array camera one 51 on one side of the product, a coaxial light source one 52, and a face array camera two 53 on the other side of the product, a coaxial light source two 54, the face array camera one 51 and the face array camera two 53 are oppositely arranged and coaxial with the product. Taking aluminum shell detection as an example, the detection station one 5 mainly detects the shell end face and the shell opening part. The face array camera one 51 is matched with the coaxial light source one 52 and is distributed on one side of the aluminum shell, and the explosion-proof hole, scratch, double impact, oil stain, and explosion-proof leakage are detected by coaxial light diffuse reflection; the face array camera two 53 is matched with the coaxial light source two 54 and is distributed on one side of the product, and the flat shell and mixed material (diameter) are detected by coaxial light diffuse reflection.

[0039] The detection station two 6 includes a face array camera three 61 and a coaxial light source three 62, the face array camera three 61 is towards the bottom of the product and coaxial with the product, and the detection station two 6 is mainly used for detecting the inner bottom of the shell. The face array camera three 61 is matched with the coaxial light source three 62 and is distributed on one side of the aluminum shell, and the inner bottom scratch is detected by coaxial light diffuse reflection.

[0040] The detection station three 7 includes a face array camera four 71, a face array camera five 72, a face array camera six 73, and a face light source one 74, the face array camera four 71 is located directly above the product, the face array camera five 72 and the face array camera six 73 are both inclined and have different angles, and both are towards the outer surface of the product. The detection station three 7 detects the defects of the cylindrical surface under different reflection angles by mirror reflection, specifically: material shortage of the opening part, crack (obvious defect) of the opening part, gap of the opening part, depression, broken hole, and dirt; crack (obvious defect) of the opening part, gap of the opening part, and broken hole. This station is a rotating station, and the camera adopts multi-frame shooting of defects at different positions of the cylindrical surface.

[0041] The detection station four 8 includes a face array camera seven 81 and a face array camera eight 82, a face light source two 83 and a face light source three 84, the face array camera seven 81 and the face array camera eight 82 are both inclined, and are located on different sides of the product, and the face array camera seven 81 shoots one end of the product from top to bottom, and the face array camera eight 82 shoots the other end of the product from bottom to top. The face array camera seven 81 is matched with the face light source two 83 to detect the defects of the inner wall of the opening part, specifically: inner wire drawing and crack. The face array camera eight 82 is matched with the face light source three 84 to detect the defects of the end face and R angle by mirror reflection, specifically: scratch, R edge damage, and bottom scratch. This station is a rotating station, and the camera adopts multi-frame shooting of defects at different positions of one circle.

[0042] The four detection stations successively detect different parts of the product, take photos by the camera, perform image processing and analysis by the upper computer group, and perform defect judgment, wherein the image processing and analysis is realized by the prior art scheme, the camera, the light source and the like are prior art, and the camera model, the light source model and the like are selected according to requirements.

[0043] The discharging device 9 is located behind the four detection stations 8, the discharging device 9 comprises a defective product collecting chute 91 and a good product collecting chute 92, the opposite sides of the defective product collecting chute 91 are provided with pneumatic rejection devices 93, the pneumatic rejection devices 93 adopt a pneumatic valve structure, blow the unqualified products into the defective product collecting chute 91, and continue to forwardly convey the qualified products into the good product collecting chute 92.

[0044] The scheme adopts the obliquely arranged roller chain conveying line 3 to convey the product, the product is detected in a horizontal state, is suitable for detecting a cylindrical product with a large length-diameter ratio, has high conveying stability, cooperates with the rotary driving device 4 to realize relative rotation of the product, makes the detection have no dead angle, and can adjust the rotating speed, improve the camera frame rate, thereby more accurately detects the material, and reduces the influence of the camera depth of field and edge distortion on the detection accuracy. Four groups of detection stations are arranged outside the roller chain conveying line 3, the detection requirements are met, and the number of cameras is effectively reduced, thereby reducing the cost of hardware.

[0045] Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.

Claims

1. A defect detection device for cylindrical products, characterized in that: It includes a frame, a roller chain conveyor line mounted on the frame, a detection mechanism located outside the roller chain conveyor line, and a feeding device and a discharging device located at the inlet and outlet ends of the roller chain conveyor line, respectively. The roller chain conveyor line is inclined, and the rollers on it are movably arranged. A rotating conveyor section is provided on the roller chain conveyor line, and a rotating drive device is provided on this section to drive 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. Detection station three and detection station four are located in the rotating conveyor section, and detection station three and detection station four are rotating detection stations.

2. The defect detection device for cylindrical products according to claim 1, characterized in that: The bottom of the roller chain conveyor is provided with a support base, and the angle between the support base 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. One end of the roller is provided with a synchronous wheel, which is located above the synchronous belt and in contact with the synchronous belt.

4. The defect detection device for cylindrical products according to claim 3, characterized in that: The drive wheel assembly includes a drive wheel located in the middle and connected to the output end of a rotary drive motor, two tension wheels symmetrically arranged on both sides of the drive wheel, and two steering wheels located outside the two tension wheels.

5. The defect detection device for cylindrical products according to claim 1, characterized in that: The rotary conveyor section is provided with a retaining edge, which is located on the lower side of the rotary conveyor 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 handling brush located at the outlet of the feeding chute. The products are arranged sequentially in the feeding chute, and the electric material handling brush is horizontally positioned above the roller chain conveyor line.

7. The defect detection device for cylindrical products according to claim 1, characterized in that: The discharge device is located after the fourth inspection station. The discharge device includes a defective product collection chute and a good product collection chute. A pneumatic rejection device is provided 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 first inspection station includes an area scan camera and a coaxial light source located on one side of the product, and an area scan camera and a coaxial light source located on the other side of the product. The area scan camera and the area scan camera are arranged opposite to each other and are coaxial with the product. The second inspection station includes a three-phase area camera and a three-phase coaxial light source. The three-phase area camera faces the bottom of the product and is coaxial with the product.

9. A defect detection device for cylindrical products according to claim 1, characterized in that: The third inspection station includes a fourth area array camera, a fifth area array camera, a sixth area array camera, and a first area light source. The fourth area array camera is located directly above the product. The fifth and sixth area array cameras are both tilted at different angles and both face the outer surface of the product. The fourth inspection station includes a seven-area array camera and an eight-area array camera, a second-area light source and a third-area light source. Both the seven-area array camera and the eight-area array camera are tilted and located on different sides of the product. The seven-area array camera takes pictures of one end of the product from top to bottom, while the eight-area array camera takes pictures of the other end of the product from bottom to top.

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