Pipe appearance defect detection equipment based on CCD visual inspection

Abstract

The invention discloses pipe appearance defect detection equipment based on CCD (charge coupled device) visual inspection, which comprises a mounting base, a mounting frame, a suspension beam and a chain scraper conveyor, and a pipe placement component is fixedly connected onto a chain plate of the chain scraper conveyor. A pipe fitting lowering counting assembly, a first camera assembly, a second camera assembly, a third camera assembly, a fourth camera assembly, a first position adjusting assembly, a fifth camera assembly, a sixth camera assembly, a second position adjusting assembly, a seventh camera assembly, an eighth camera assembly and a sorting and discharging assembly are fixedly installed on the suspension beam in sequence. The fifth camera assembly and the sixth camera assembly are both located on one side of the pipe fitting placing assembly, and the seventh camera assembly and the eighth camera assembly are both located on the other side of the pipe fitting placing assembly. According to the full-automatic pipe fitting detection device, continuous and automatic discharging, feeding, all-directional detection and classified discharging of pipe fitting products can be achieved, appearance detection is comprehensively covered, the detection result is accurate and reliable, and the detection efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of visual inspection equipment, specifically to a pipe fitting appearance defect inspection device based on CCD visual inspection. Background Technology

[0002] Machine vision inspection uses a computer equipped with a CCD vision inspection system to replace human eye inspection. It can detect and judge product appearance defects, material surfaces, migrations, exudates, blooming, discoloration, foreign matter, contaminants, and other unknown substances, including unknown powders, liquids, and particles. Appearance inspection is the most widely used application in the field of machine vision inspection. With the right vision inspection equipment, inspection efficiency is significantly improved. Most products undergo quality inspection after production, and appearance inspection is a type of quality inspection. Many quality problems can be directly displayed through visual inspection. For hollow tubular fittings, especially those used in precision instruments, the appearance of the fittings directly affects the overall performance and lifespan of the instruments and equipment using them.

[0003] Currently, the appearance and dimensional inspection of existing pipe fittings are still generally carried out manually. However, traditional appearance inspection relies on the human eye, and dimensional inspection is usually done manually with a handheld micrometer. The inspection results are inconsistent due to the experience level of the inspectors, and prolonged staring at small objects can cause eye fatigue, easily leading to the rejection of defective products and compromising the overall quality of batch products. Furthermore, the low work continuity of employees contributes to increased production costs, and manual inspection reduces the automation level of the production line, resulting in low inspection efficiency.

[0004] In the prior art, mechanized or automated equipment for the appearance and dimensional inspection of pipe fittings mostly targets a specific shape or size of the pipe fitting. For example, the pipe fitting anomaly detection device disclosed in Chinese invention patent CN111551359A automatically detects whether there is an abnormality of no protrusion on the capillary tube through the detection unit. That is, when the pipe fitting passes through the detection channel, if there is a protrusion on it, it means that the capillary tube is not abnormal. The protrusion will increase the width of the detection channel and be detected by the detection unit, which will then emit a signal to indicate that the pipe fitting is not abnormal. Conversely, when the pipe fitting passes through the detection channel, if there is no protrusion on it, it means that the capillary tube is abnormal. The width of the detection channel remains unchanged, and the detection unit emits a signal to indicate that the pipe fitting is abnormal. This technical solution can only detect whether there are protrusions on the capillary tube, but it cannot detect the shape and size of the protrusions. For example, the Chinese invention patent with announcement number CN109059722A discloses a pipe fitting detection device, which sets the outer diameter of the pipe fitting by setting the detection clamping plates with adjustable spacing, and then detects whether the pipe diameter is qualified according to whether the pipe fitting can be inserted between the detection clamping plates. It can only be used to detect the diameter of the pipe fitting.

[0005] Therefore, the above-mentioned testing devices all have the following shortcomings: First, existing pipe fitting testing equipment generally only tests the shape or size of the pipe fitting, and cannot accurately test the appearance quality and limiting defects of the outer circular surface and end surface of the pipe fitting, resulting in incomplete testing, inability to achieve comprehensive performance evaluation of the product, easy misjudgment of good products, and inability to guarantee product quality and performance; Second, the placement of the materials to be tested one by one usually requires manual operation to accurately place the workpiece in the testing position, which cannot achieve automatic continuous feeding and simultaneous testing of multiple products, thus resulting in low testing efficiency; Third, the results of the tested products are simply classified into good and bad products, without further subdividing the defect types of bad products, which is not conducive to targeted improvement of the production process and defect repair of bad products in the later stage, and increases the labor intensity and maintenance cost of repair. Summary of the Invention

[0006] The present invention proposes a pipe fitting appearance defect detection device based on CCD vision inspection, which can realize continuous automatic feeding, feeding, all-round inspection and sorting of materials. It has comprehensive appearance inspection coverage, accurate and reliable inspection results, short inspection cycle for a single product, and simultaneous inspection of multiple products, resulting in high inspection efficiency.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A CCD vision inspection-based pipe fitting appearance defect detection device includes a mounting base, a mounting frame fixedly mounted on the top surface of the mounting base, a suspension beam fixedly mounted on the top of the mounting frame and horizontally arranged, and a chain conveyor mounted on the outside of the suspension beam. The chain conveyor has a pipe fitting placement component fixedly connected to the chain plate for placing pipe fittings. The suspension beam is sequentially fixedly mounted along the conveying direction of the chain conveyor with a pipe fitting lowering counting component, a first camera component, a second camera component, a third camera component, a fourth camera component, a first position adjustment component, a fifth camera component, a sixth camera component, a second position adjustment component, a seventh camera component, an eighth camera component, and a sorting and unloading component.

[0009] The first camera assembly, the second camera assembly, the third camera assembly, and the fourth camera assembly are all positioned vertically above the pipe placement assembly. The side wall of the suspension beam is fixedly installed with pipe actuation components, which are respectively located below the first camera assembly, the second camera assembly, the third camera assembly, and the fourth camera assembly and above the pipe placement assembly. The pipe actuation components cause the pipes on the pipe placement assembly to rotate along their own axis during the process, thereby adjusting their position by 90°.

[0010] The fifth and sixth camera components are both located on one side of the pipe placement component, and the first position adjustment component guides and positions the pipe placed on the pipe placement component on that side. The seventh and eighth camera components are both located on the other side of the pipe placement component, and the second position adjustment component guides and positions the pipe placed on the pipe placement component on that side.

[0011] Furthermore, the pipe placement assembly includes a U-shaped frame plate fixedly connected to the outer surface of the chain plate, two first mandrels inserted into the side walls of the U-shaped frame plate, and a first support sleeve rotatably sleeved on the outside of each first mandrel. The axes of the two first support sleeves are located in the same horizontal plane and are symmetrically distributed on both sides of the side wall of the U-shaped frame plate. The pipe is located between the top of the outer circular surface of the two first support sleeves.

[0012] Furthermore, a limiting plate is fixedly connected to the side wall of the U-shaped frame plate, and a limiting groove is opened at the neck of the first mandrel on the outer side wall of both sides of the U-shaped frame plate, and the edge of the limiting plate is slidably embedded in the limiting groove.

[0013] Furthermore, at least one tensioning assembly is fixedly connected to the side wall of the suspension beam. The tensioning assembly includes a side plate fixedly connected to the side wall of the suspension beam, a second spindle inserted into the bottom end of the side plate and located below the bottom of the chain conveyor, and a second support sleeve rotatably sleeved on the outside of the second spindle. When the first support sleeve moves above the second support sleeve, the outer circular surface of the first support sleeve rolls into contact with the outer circular surface of the second support sleeve.

[0014] Furthermore, the pipe fitting lowering counting assembly includes a gantry plate fixedly connected to both sides of the suspension beam and located above the pipe fitting placement assembly, a feeding cylinder fixedly installed on the top surface of the gantry plate, and a feeding guide plate fixedly installed on the gantry plate and located directly below the feeding cylinder. The bottom output end of the feeding cylinder is fixedly connected to a feeding push block. The feeding guide plate is inclined and its bottom end is located below the feeding push block and has a feeding port that matches the feeding push block. A sealing plate located below the feeding port is hinged to the bottom surface of the feeding guide plate. Guide side plates are fixedly installed on both sides of the top surface of the feeding guide plate, and a guide channel with a larger top and smaller bottom and connected to the feeding port is formed between the two guide side plates.

[0015] The inner walls of the two side plates of the gantry frame are fixedly installed with detection sensors located directly below the discharge port.

[0016] Furthermore, the first position adjustment component includes a first mounting bracket fixedly installed on the side wall of the suspension beam, and a first guide plate fixedly connected to the top of the first mounting bracket and located directly above the pipe placement component. The bottom surface of the first guide plate is provided with a first guide groove that is consistent with the travel direction of the pipe placement component. The first guide groove pushes the traveling pipe towards the side of the pipe placement component closer to the fifth camera component and the sixth camera component.

[0017] Furthermore, the second position adjustment component includes a second mounting bracket fixedly installed on the side wall of the suspension beam, and a second guide plate fixedly connected to the top of the second mounting bracket and located directly above the pipe placement component. The bottom surface of the second guide plate has a second guide groove that is consistent with the travel direction of the pipe placement component. The second guide groove pushes the traveling pipe towards the side of the pipe placement component closer to the seventh camera component and the eighth camera component.

[0018] Furthermore, the sorting and unloading assembly includes a pushing cylinder disposed on one side above the pipe placement assembly, a sorting and unloading mechanism disposed on the other side above the pipe placement assembly and opposite to the pushing cylinder, and multiple collection boxes disposed below the discharge end of the sorting and unloading mechanism. The pushing cylinder selectively pushes the pipes from the pipe placement assembly into the sorting and unloading mechanism, and the sorting and unloading mechanism selectively feeds the pipes into one of the collection boxes.

[0019] Furthermore, the sorting and feeding mechanism includes a sorting connecting plate fixedly connected to the side of the suspension beam, a clamping block fixedly set on the top of the sorting connecting plate, two sorting and feeding channels fixedly clamped in the clamping block, and a sorting and feeding port fixedly connected to the top of the sorting and feeding channels. A material distribution channel baffle is rotatably connected to the inner middle of the sorting and feeding port. A sorting cylinder bracket is fixedly connected to the top surface of the sorting and feeding port. A sorting cylinder is rotatably connected to the sorting cylinder bracket. A swing rod is rotatably connected to the output end of the sorting cylinder. The other end of the swing rod is fixedly connected to one end of the rotating shaft of the material distribution channel baffle.

[0020] Furthermore, the first camera assembly includes a first horizontal slide rail fixedly mounted on the mounting bracket, a first vertical slide rail slidably mounted on the top of the first horizontal slide rail, a first positioning block and a second positioning block slidably mounted on the sides of the first vertical slide rail, a first camera fixedly mounted on the side of the first positioning block, and a first supplementary lighting device fixedly mounted on the side of the second positioning block. The image-taking end of the first camera is vertically downward, and the first supplementary lighting device is located directly below the first camera and directly above the tubular component placement assembly.

[0021] Furthermore, the fifth camera assembly includes a second vertical slide rail fixedly mounted on the side of the suspension beam, a second horizontal slide rail slidably mounted on the side of the second vertical slide rail, a third positioning block and a fourth positioning block slidably mounted on the top of the second horizontal slide rail, a fifth camera fixedly mounted on the top of the third positioning block, and a second supplementary lighting device fixedly mounted on the top of the fourth positioning block. The image-taking end of the fifth camera faces the tube placement assembly, and the second supplementary lighting device is located between the fifth camera and the tube placement assembly.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention employs a pipe counting component that can feed pipes one by one, in conjunction with a pipe placement component that moves at a constant speed, to automatically place pipes one by one for subsequent continuous inspection. This achieves automatic continuous feeding, high work efficiency, and accurate and reliable pipe placement with good consistency, which also facilitates subsequent image acquisition, analysis and comparison.

[0024] 2. This invention employs multiple CCD inspection cameras sequentially positioned along the workpiece's travel path. Workpieces are placed using a pipe placement assembly, which is then driven by a plate chain conveyor to pass through various inspection stations. Pipe-moving assemblies are installed between these stations to adjust the circumferential position of the pipes, or position adjustment assemblies to adjust their axial position. This allows for comprehensive inspection of all areas of the pipe surface, resulting in more accurate and complete inspection results. Furthermore, the plate chain conveyor continuously feeds the pipes placed on the pipe placement assembly, enabling simultaneous feeding, inspection, and sorting of multiple products, effectively reducing unnecessary intervals and significantly improving work efficiency.

[0025] 3. This invention uses multiple CCD inspection cameras to detect the quality of different parts of the product under inspection, so as to comprehensively evaluate surface appearance defects, classify and statistically analyze appearance defects, and facilitate the improvement and adjustment of production processes with high defect rates to reduce the defect rate; by setting up a sorting and unloading component with channel selection function, good products and different types of defective products are automatically separated, which facilitates the precise repair of defective products for specific defect types in the later stage and reduces unnecessary labor. Attached Figure Description

[0026] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0027] Figure 2 This is a second three-dimensional structural schematic diagram of the present invention;

[0028] Figure 3 This is a schematic diagram of the main structure of the present invention;

[0029] Figure 4A three-dimensional structural diagram of the pipe fitting placement assembly;

[0030] Figure 5 for Figure 2 Enlarged structural diagram of section A in the middle;

[0031] Figure 6 One of the three-dimensional structural schematic diagrams of the tube fitting lowering counting assembly;

[0032] Figure 7 This is the second three-dimensional structural diagram of the counting assembly for lowering the pipe fitting;

[0033] Figure 8 This is a cross-sectional view of the pipe fitting lowering counting assembly.

[0034] Figure 9 One of the three-dimensional structural schematic diagrams of the first position adjustment component;

[0035] Figure 10 The second three-dimensional structural schematic diagram of the first position adjustment component;

[0036] Figure 11 One of the three-dimensional structural schematic diagrams of the second position adjustment component;

[0037] Figure 12 The second three-dimensional structural schematic diagram of the second position adjustment component;

[0038] Figure 13 A three-dimensional structural schematic diagram of the tube fitting actuation assembly;

[0039] Figure 14 This is one of the three-dimensional structural schematic diagrams of the sorting and feeding mechanism;

[0040] Figure 15 This is the second three-dimensional structural schematic diagram of the sorting and feeding mechanism;

[0041] Figure 16 This is a three-dimensional structural diagram of the fifth camera component;

[0042] Figure 17 This is a three-dimensional structural diagram of the first camera component.

[0043] In the diagram: 1. Mounting base; 2. Mounting bracket; 3. Suspension beam; 4. Chain conveyor; 5. Pipe placement assembly; 501. U-shaped frame; 502. First mandrel; 503. First supporting sleeve; 504. Limiting plate; 6. First camera assembly; 601. First horizontal slide rail; 602. First vertical slide rail; 603. First positioning block; 604. First camera; 605. Second positioning block; 606. First supplementary lighting device; 7. Second camera assembly; 8. Third camera assembly; 9. Fourth camera assembly; 10. First position adjustment assembly; 101. First mounting bracket; 102. First guide plate; 11. Fifth camera assembly; 111. Second vertical slide rail; 112. Second horizontal slide rail; 113. Third positioning block; 114. Fourth positioning block; 115. Fifth camera; 116. Second supplementary lighting device; 12. Sixth camera assembly; 13. Second position adjustment assembly; 131. Second mounting bracket; 13. 2 Second guide plate, 14 Seventh camera assembly, 15 Eighth camera assembly, 16 Sorting and unloading assembly, 161 Pushing cylinder, 162 Sorting and unloading mechanism, 1621 Sorting connecting plate, 1622 Clamping block, 1623 Sorting and unloading channel, 1624 Sorting and unloading port, 1625 Sorting channel baffle, 1626 Sorting cylinder bracket, 1627 Sorting cylinder, 1628 Swing rod, 163 Collection box, 17 Pipe fittings The components are: 171 gantry plate, 172 feeding cylinder, 173 feeding guide plate, 174 feeding push block, 175 feeding port, 176 guide side plate, 177 detection sensor, 178 sealing plate, 18 tensioning assembly, 181 side upright plate, 182 second mandrel, 183 second support sleeve, 19 pipe fitting actuation assembly, 191 third mounting bracket, 192 side sealing plate, 193 actuation strip, and 100 pipe fitting. Detailed Implementation

[0044] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0045] This equipment involves technologies such as motor motion control, cylinder motion control, sensor detection input and feedback, and visual inspection and analysis. Therefore, its use requires a corresponding electrical cabinet. This cabinet houses a computer host, pneumatic supply equipment, motor drivers, and other conventional control and power systems for overall equipment control. The computer host contains visual inspection and analysis software for processing and comparing images captured by the camera, and a corresponding display is provided for real-time display of the detection process and analysis results. All of the above devices and systems are existing technologies; only the logic control program for power control and the parameters for image analysis have been adapted. Therefore, they will not be described in detail here. The following will only provide a detailed explanation of the innovative structural design and working process of this equipment.

[0046] Please see Figures 1 to 17A CCD vision inspection-based pipe fitting appearance defect detection device includes a mounting base 1, a mounting frame 2 fixedly mounted on the top surface of the mounting base 1, a horizontally arranged suspension beam 3 fixedly mounted on the top of the mounting frame 2, and a chain conveyor 4 mounted on the outside of the suspension beam 3. The mounting base 1 is constructed with a C-shaped steel welded frame, with steel plates forming the side and top plates, welded to the frame. Adjustable feet are installed at the four corners of the bottom of the mounting base 1 for supporting the entire device and leveling the top surface of the mounting base 1. The mounting frame 2 is constructed of hollow square steel welded together and fixedly mounted on the top surface of the mounting base 1 by bolts. The internal cavities of the mounting base 1 and the mounting frame 2 can be used for laying the wiring of various electrical components of the device. The suspension beam 3 is an integral cast structure, with T-slots or dovetail slots cut along its length on both sides. Multiple sliding blocks (such as...) for bolt connections are slidably arranged within the slots. Figure 5 As shown, the mounting frame 2 is used for the installation, fixing, and horizontal adjustment of other functional components of the equipment. A connecting seat is bolted to the top of the mounting frame 2, and the side of the connecting seat is threadedly connected to and secured to the corresponding sliding block by bolts, thus horizontally fixing the suspension beam 3 at the top of the mounting frame 2. In the chain conveyor 4, two sprockets are respectively rotatably mounted at both ends of the suspension beam 3, and a chain is meshed with the two sprockets. The drive motor is fixedly mounted on one side of the mounting frame 2, and its main output shaft is connected to the sprocket shaft on the side where the pipe fitting 100 is located in the direction of travel during equipment testing via a chain drive device. The chain conveyor 4 enables continuous feeding of the pipe fitting 100 throughout the entire testing process, thereby achieving station switching.

[0047] The chain conveyor 4 has a pipe fitting placement assembly 5 fixedly connected to its chain plate for placing pipe fittings 100. For example... Figure 4As shown, the pipe placement assembly 5 includes a U-shaped frame plate 501 fixedly connected to the outer surface of the chain plate, two first spindles 502 inserted into the side walls of the U-shaped frame plate 501, and a first support sleeve 503 rotatably sleeved on the outside of each first spindle 502. The width of the U-shaped frame plate 501 (corresponding to the dimension along the axis of the pipe 100) is approximately equal to the width of the chain plate, and the length of the U-shaped frame plate 501 (corresponding to the dimension along the travel direction of the pipe 100) is approximately equal to or slightly less than the length of the chain plate, so that there is a certain distance between the various connected pipe placement assemblies 5. The first support sleeve 503 is a hollow cylindrical structure, with rolling bearings embedded on the inner sides of both ends. The inner rings of the rolling bearings are sleeved on the first spindles 502, allowing the first bearing sleeve 503 to rotate freely on the first spindles 502 to meet the positional adjustment of the pipe 100 during subsequent testing. The axes of the two first support sleeves 503 are located in the same horizontal plane and are symmetrically distributed on both sides of the side wall of the U-shaped frame plate 501. The pipe fitting 100 is located between the top of the outer circular surface of the two first support sleeves 503. The axial dimension of the first support sleeve 503 is about twice the axial dimension of the pipe fitting 100.

[0048] Preferably, a limiting plate 504 is fixedly connected to the side wall of the U-shaped frame plate 501 by bolts. A limiting groove is opened on the neck of the first spindle 502 located on the outer side wall of both sides of the U-shaped frame plate 501. The edge of the limiting plate 504 is slidably embedded in the limiting groove to realize the axial positioning of the first spindle 502, and also to facilitate the assembly and disassembly of the various parts of the pipe fitting placement assembly 5.

[0049] At least one tensioning assembly 18 (three in this embodiment, and approximately equidistantly arranged between the two sprockets of the chain conveyor 4) is fixedly connected to the side wall of the suspension beam 3. Figure 5As shown, the tensioning assembly 18 includes a side plate 181 fixedly connected to the side wall of the suspension beam 3, a second spindle 182 inserted into the bottom end of the side plate 181 and located below the bottom of the chain conveyor 4, and a second support sleeve 183 rotatably sleeved on the outside of the second spindle 182. The top of the side plate 181 is bolted to a sliding block inside the side of the suspension beam 3. The second support sleeve 183 is a hollow cylindrical structure with rolling bearings embedded at both ends, the inner rings of which are sleeved on the second spindle 182. Similar to the pipe placement assembly 5, a limiting plate is bolted to the side wall of the side plate 181. A limiting groove is formed in the neck of the second spindle 182 located on the outside of the side wall of the side plate 181. The edge of the limiting plate is slidably embedded in the limiting groove to achieve axial positioning of the second spindle 182. When the chain conveyor 4 is operating, driving the various pipe fitting placement assemblies 5 to move cyclically, when the pipe fitting placement assemblies 5 are located at the bottom horizontal conveying section of the chain conveyor 4, the first supporting sleeve 503 moves above the second supporting sleeve 183, and the outer circular surface of the first supporting sleeve 503 rolls into contact with the outer circular surface of the second supporting sleeve 183. Thus, by setting the tensioning assembly 18, the problem of severe sagging in the middle of the bottom horizontal section of the chain conveyor 4 due to excessive conveying distance can be avoided, ensuring reliable meshing connection between the sprocket and the chain. The tensioning position and tensioning effect can be adjusted by increasing or decreasing the number of tensioning assemblies 18 or adjusting the horizontal position of the tensioning assemblies 18 on the suspension beam 3.

[0050] Along the conveying direction of the chain conveyor 4, the suspension beam 3 is sequentially fixed with a pipe fitting lowering counting assembly 17, a first camera assembly 6, a second camera assembly 7, a third camera assembly 8, a fourth camera assembly 9, a first position adjustment assembly 10, a fifth camera assembly 11, a sixth camera assembly 12, a second position adjustment assembly 13, a seventh camera assembly 14, an eighth camera assembly 15, and a sorting and unloading assembly 16.

[0051] like Figures 6 to 8As shown, the pipe fitting lowering and counting assembly 17 includes a gantry plate 171 fixedly connected to both sides of the suspension beam 3 and located above the pipe fitting placement assembly 5, a feeding cylinder 172 fixedly installed on the top surface of the gantry plate 171, and a feeding guide plate 173 fixedly installed on the gantry plate 171 and located directly below the feeding cylinder 172. The bottom of the two side plates of the gantry plate 171 are fixedly connected to the sliding blocks inside the side of the suspension beam 3 by bolts, so as to adjust the horizontal position of the pipe fitting lowering and counting assembly 17 on the suspension beam 3. A feeding pusher block 174 is fixedly connected to the bottom output end of the feeding cylinder 172. The feeding guide plate 173 is inclined and its bottom end is located below the feeding pusher block 174, and it has a feeding port 175 that matches the feeding pusher block 174. A sealing plate 178 located below the feeding port 175 is hinged to the bottom surface of the feeding guide plate 173. Guide side plates 176 are fixedly provided on both sides of the top surface of the feeding guide plate 173. A guide channel with a larger top and a smaller bottom and connected to the feeding port 175 is formed between the two guide side plates 176. The length of the feeding port 175 is slightly greater than the axial length of the pipe fitting 100, and the width of the feeding port 175 is slightly greater than the outer diameter of the pipe fitting 100. Thus, the feeding port 175 can only allow a single pipe fitting 100 to pass through at a time.

[0052] After the pipe fitting 100 enters the guide channel from the top of the discharge guide plate 173, it rolls naturally downwards along the top surface of the discharge guide plate 173 and rolls to the top of the discharge port 175 under the guidance of the guide side plates 176 on both sides. Since an end baffle located on one side of the edge of the discharge port 175 is integrally provided above the bottom end of the discharge guide plate 173, and the sealing plate 178 is rotatably connected to the bottom surface of the discharge guide plate 173 by a torsion spring, in the non-stressed state, the sealing plate 178 is horizontally located below the discharge port 175, thus blocking the discharge port 175. Therefore, the pipe fitting 100 rolling to the discharge port 175 is blocked by the end baffle and stays at the top of the discharge port 175, and is supported by the sealing plate 178 and will not fall. When the pipe fitting 100 needs to be lowered onto the pipe fitting placement assembly 5 below, the feeding cylinder 172 operates, pushing the feeding pusher 174 vertically downwards. The feeding pusher 174 then pushes the pipe fitting 100 below downwards simultaneously. The pipe fitting 100 gradually enters and passes through the feeding port 175, pushing the sealing plate 178 to gradually flip down to a vertical position and be located on the bottom side of the feeding port 175. At this time, the next pipe fitting 100 in the guide channel rolls down to the top side of the feeding port 175 and closes to the side wall of the feeding pusher 174. Contact; when the pipe fitting 100 is completely detached from the discharge port 175 and falls to the middle position between the two first supporting sleeves 503 of the pipe fitting placement assembly 5, the pipe fitting 100 and the pipe fitting placement assembly 5 are driven forward by the chain conveyor 4. The discharge cylinder 172 works in reverse, causing the discharge pusher block 174 to move upward and reset. The sealing plate 178 loses the external force and automatically flips upward to block the discharge port 175 again. The pipe fitting 100 in the guide channel continues to roll into the discharge port 175 due to the upward movement of the discharge pusher block 174. In this way, the individual pipe fittings 100 can be lowered one by one.

[0053] A detection sensor 177 (such as an infrared detector) is fixedly installed on the inner wall of the two side plates of the gantry plate 171, located directly below the discharge port 175, to detect the presence or absence of pipes on the pipe placement assembly 5 and to mark the serial number of the pipe 100. Since the linear conveying speed of the chain conveyor 4 is fixed, the time interval for the pipe placement assembly 5 to pass under the pipe placement assembly 17 is also fixed. Therefore, the working interval of the discharge cylinder 172 is consistent with this time interval, ensuring that only one pipe 100 is placed on each pipe placement assembly 5. When the detection sensor 177 detects a pipe 100 on the pipe placement assembly 5, the total number of pipes in the system is incremented by 1, and the serial number of the corresponding pipe 100 becomes the total number. If no pipe 100 is detected on the pipe placement assembly 5, the total number remains unchanged.

[0054] Preferably, the equipment can use manual feeding to continuously feed pipe fittings 100 into the pipe fitting counting component 17, or it can use a spiral vibrating feeder to achieve automatic continuous feeding of pipe fittings 100, so as to improve the degree of automation and production efficiency, save labor costs, and improve operational safety.

[0055] The first camera assembly 6, the second camera assembly 7, the third camera assembly 8, and the fourth camera assembly 9 are all positioned vertically above the pipe placement assembly 5. In this embodiment, the first camera assembly 6, the second camera assembly 7, the third camera assembly 8, and the fourth camera assembly 9 have the same structure, installation method, and operation process. Therefore, the specific structure of these four cameras will be described below using the first camera assembly 6 as an example.

[0056] like Figure 17 As shown, the first camera assembly 6 includes a first horizontal slide rail 601 fixedly mounted on the mounting bracket 2, a first vertical slide rail 602 slidably mounted on the top of the first horizontal slide rail 601, a first positioning block 603 and a second positioning block 605 slidably mounted on the sides of the first vertical slide rail 602, a first camera 604 fixedly mounted on the side of the first positioning block 603, and a first supplementary lighting device 606 fixedly mounted on the side of the second positioning block 605. The image-taking end of the first camera 604 is vertically downward, and the first supplementary lighting device 606 is located directly below the first camera 604 and directly above the tube placement assembly 5. It includes a light source box and a condenser hood located at the bottom of the light source box. The light source box can provide illumination to the tube 100 at the bottom to ensure the brightness of the image. The condenser hood, made of non-transparent material, can avoid light dispersion and interference from external ambient light on the light in the image-taking area, so as to ensure uniform light distribution in the image-taking area and thus ensure the clarity of the image. When the pipe 100 marked with serial number N is located directly below the first camera 604, the first camera 604 captures the appearance pattern of the outer surface of the pipe in a top view, and then compares the image with the preset standard sample in the system to detect the length, cylindricity, and surface grooves, dirt, and scratches of the pipe 100 in the corresponding pose state. If an appearance defect is detected on the outer circumference of the pipe, the part count of the corresponding defect type is incremented by 1.

[0057] The horizontal image acquisition area of ​​the first camera 604 can be adjusted by adjusting the horizontal position of the first vertical slide rail 602 on the first horizontal slide rail 601. The vertical image acquisition distance of the first camera 604 can be adjusted by adjusting the vertical position of the first positioning block 603 on the first vertical slide rail 602. The supplementary lighting position of the first supplementary lighting device 606 can be adjusted by adjusting the vertical position of the second positioning block 605 on the first vertical slide rail 602, thereby obtaining the best image acquisition effect.

[0058] A pipe-moving assembly 19 is fixedly installed on the side wall of the suspension beam 3. These assemblies are respectively positioned below the first camera assembly 6, the second camera assembly 7, the third camera assembly 8, and the fourth camera assembly 9, and above the pipe-pole placement assembly 5. The pipe-pole moving assembly 19 causes the pipe 100 on the pipe-pole placement assembly 5 to rotate along its own axis during operation, adjusting its position by 90°. For example... Figure 13 As shown, the pipe fitting actuation assembly 19 includes a third mounting bracket 191 and an actuation bar 193 fixedly mounted on the bottom surface of the top side of the third mounting bracket 191. The actuation bar 193 is made of flexible rubber material, and its length direction is consistent with the travel direction of the pipe fitting 100. When the pipe fitting placement assembly 5 carries the pipe fitting 100 forward, and the pipe fitting 100 enters below the actuation bar 193, the top surface of the pipe fitting 100 and the bottom surface of the actuation bar 193 generate squeezing friction, causing the pipe fitting 100 to roll. Since the first support sleeve 503 at the bottom of the pipe fitting 100 is in a free rolling state, the outer circumference of the pipe fitting 100 rolls continuously on the bottom surface of the actuation bar 193. When the pipe fitting 100 is disengaged from the actuation bar 193, the pipe fitting 100 stops rotating. Therefore, by setting the length of the actuation bar 193, the position and posture adjustment of the pipe fitting 100 at a certain angle can be achieved. In this embodiment, after the toggle bar 193 actuates the pipe fitting 100, the phase difference between its front and rear positions is 90°. In this embodiment, a groove is provided on the bottom surface of the top side plate of the third mounting bracket 191, the top of the toggle bar 193 is detachably inserted into the groove, and a side sealing plate 192 located at the end of the groove is fixedly connected to the side of the third mounting bracket 191, so that the toggle bar 193 is fixed on the third mounting bracket 191.

[0059] After the first camera assembly 6 completes the image capture of the tube 100 marked with serial number N, the tube 100 continues to move along with the tube placement assembly 5. Then, after the action of the tube actuation assembly 19 behind the first camera assembly 6, the circumferential pose of the tube 100 is adjusted by 90°, and then it enters the area below the second camera assembly 7 to complete the second image capture and detection analysis, just like the first camera assembly 6. After the second image capture is completed, the circumferential pose of the tube 100 is further adjusted by 90° by the tube actuation assembly 19 behind the second camera assembly 7. This cycle is repeated so that the first image capture assembly 6, the second camera assembly 7, the third camera assembly 8, and the fourth camera assembly 9 can respectively complete the top-view appearance detection of the tube in four different pose states. At the same time, after the four tube actuation assemblies 19 are acted on in sequence, the tube 100 returns to its initial placement pose.

[0060] The fifth camera assembly 11 and the sixth camera assembly 12 are both located on one side of the pipe placement assembly 5. The first position adjustment assembly 10 is located between the fifth camera assembly 11 and the fourth camera assembly 9, and can guide and position the pipe 100 placed on the pipe placement assembly 5 on that side. Figure 9 and Figure 10 As shown, the first position adjustment component 10 includes a first mounting bracket 101 fixedly installed on the side wall of the suspension beam 3, and a first guide plate 102 fixedly connected to the top of the first mounting bracket 101 and located directly above the pipe placement component 5. The bottom surface of the first guide plate 102 is provided with a first guide groove that is consistent with the traveling direction of the pipe placement component 5. One side of the first guide groove is provided with a side wall that is inclined to one side (as shown on the left side in the figure). When the pipe placement component 5 drives the pipe 100 to move, the top of the pipe 100 enters the first guide groove. Under the guidance of the inclined side wall, the first guide groove pushes the moving pipe 100 towards the side of the pipe placement component 5 that is close to the fifth camera component 11 and the sixth camera component 12, so that the end of the pipe 100 is located above the end of the first support sleeve 503, so that the fifth camera component 11 and the sixth camera component 12 can clearly and completely obtain the image information of the end of the pipe 100.

[0061] In this embodiment, the fifth camera assembly 11, the sixth camera assembly 12, the seventh camera assembly 14, and the eighth camera assembly 15 have the same structure, installation method, and working process. Therefore, the specific structure of these four cameras will be described below using the fifth camera assembly 11 as an example.

[0062] like Figure 16 As shown, the fifth camera assembly 11 includes a second vertical slide rail 111 vertically fixedly mounted on the side of the suspension beam 3, a second horizontal slide rail 112 slidably mounted on the side of the second vertical slide rail 111, a third positioning block 113 and a fourth positioning block 114 slidably mounted on the top of the second horizontal slide rail 101, a fifth camera 115 fixedly mounted on the top of the third positioning block 113, and a second supplementary lighting device 116 fixedly mounted on the top of the fourth positioning block 144. The image-taking end of the fifth camera 115 faces the tube placement assembly 5, and the second supplementary lighting device 116 is located between the fifth camera 115 and the tube placement assembly 5. The second supplementary lighting device 116 has the same structure and operation as the first supplementary lighting device 606. When the pipe fitting 100 marked with serial number N is located at the side-view position of the fifth camera 115, the fifth camera 115 captures the appearance pattern of the outer surface of the pipe fitting 100 in the side view state of that end, and then compares the pattern with the preset standard sample in the system to detect defects on the top of the end face of the pipe fitting 100 under the corresponding view (such as grooves, scratches), foreign objects in the inner hole and wires, pinch marks, regular chamfers, wires at the opening, etc., as well as the inner and outer diameters. If an appearance defect is detected on the end surface of the pipe fitting, the part count of the corresponding defect type is incremented by 1.

[0063] The vertical image acquisition area of ​​the fifth camera 115 can be adjusted by adjusting the vertical position of the second horizontal slide rail 112 on the second vertical slide rail 111. The horizontal image acquisition distance of the fifth camera 115 can be adjusted by adjusting the horizontal position of the third positioning block 113 on the second horizontal slide rail 112. The supplementary lighting position of the second supplementary lighting device 116 can be adjusted by adjusting the horizontal position of the fourth positioning block 114 on the second horizontal slide rail 112, thereby obtaining the best image acquisition effect.

[0064] A tube-mounting component 19 (not shown in the figure) is also provided between the fifth camera component 11 and the sixth camera component 12. The tube-mounting component 19 can enable the tube 100 to achieve a 180° position adjustment, so that after the fifth camera component 11 completes the image acquisition, the top and bottom positions of the tube 100 are swapped, and the sixth camera component 12 completes the image acquisition and detection analysis after adjusting the position of the same end of the tube 100.

[0065] The seventh camera assembly 14 and the eighth camera assembly 15 are both located on the other side of the pipe placement assembly 5 (opposite to the fifth camera assembly 11 and the sixth camera assembly 12). The second position adjustment assembly 13 is located between the sixth camera assembly 12 and the seventh camera assembly 14, and can guide and position the pipe 100 placed on the pipe placement assembly 5 on this side. Figure 11 and Figure 12 As shown, the second position adjustment component 13 includes a second mounting bracket 131 fixedly installed on the side wall of the suspension beam 3, and a second guide plate 132 fixedly connected to the top of the second mounting bracket 131 and located directly above the pipe placement component 5. The bottom surface of the second guide plate 132 is provided with a second guide groove that is consistent with the traveling direction of the pipe placement component 5. One side of the second guide groove is provided with a side wall that is inclined to one side (as shown on the right side in the figure). When the pipe placement component 5 drives the pipe 100 to move, the top of the pipe 100 enters the second guide groove. Under the guidance of the inclined side wall, the second guide groove pushes the moving pipe 100 towards the side of the pipe placement component 5 that is close to the seventh camera component 14 and the eighth camera component 15, so that the end of the pipe 100 is located above the other end of the first support sleeve 503, so that the seventh camera component 14 and the eighth camera component 1 can clearly and completely obtain the image information of the end of the pipe 100.

[0066] When the pipe fitting 100 marked with serial number N is located at the side-view position of the seventh camera assembly 14, the seventh camera assembly 14 captures the appearance pattern of the outer surface of the pipe fitting 100 in the side view state, and then compares the pattern with the preset standard sample in the system to detect defects at the top of the end of the pipe fitting 100 (such as grooves, scratches), foreign objects in the inner hole, wire pulling, pinching, regular chamfers, wire pulling at the opening, etc., as well as the inner and outer diameters. If an appearance defect is detected on the end surface of the pipe fitting, the part count of the corresponding defect type is incremented by 1.

[0067] Similarly, a tube-mounting component 19 (not shown in the figure) is also provided between the seventh camera assembly 14 and the eighth camera assembly 15. This tube-mounting component 19 allows the tube 100 to achieve a 180° position adjustment. Thus, after the seventh camera assembly 14 completes the image acquisition, the top and bottom positions of the tube 100 are swapped. The eighth camera assembly 15 then completes the image acquisition and detection analysis after adjusting the position of the same end of the tube 100. If a tube 100 passes all the tests of the first camera assembly 6, the second camera assembly 7, the third camera assembly 8, the fourth camera assembly 9, the fifth camera assembly 11, the sixth camera assembly 12, the seventh camera assembly 14, and the eighth camera assembly 15 in sequence, then the tube marked with serial number N is a good product, and the number of good products is incremented by 1.

[0068] The sorting and unloading assembly 16 is located at the top conveying end of the chain conveyor 4 and is used for the classified storage of each inspected pipe fitting 100. The sorting and unloading assembly 16 includes a pushing cylinder 161 disposed on one side above the pipe fitting placement assembly 5, a sorting and unloading mechanism 162 disposed on the other side above the pipe fitting placement assembly 5 and opposite to the pushing cylinder 161, and a plurality of collection boxes 163 disposed below the discharge end of the sorting and unloading mechanism 162. The pushing cylinder 161 selectively pushes the pipe fitting 100 of the pipe fitting placement assembly 5 into the sorting and unloading mechanism 162, and the sorting and unloading mechanism 162 selectively feeds the pipe fitting 100 into one of the collection boxes 163. In this embodiment, the inspected pipe fittings 100 are divided into four categories for sorting, unloading, and centralized collection: dimensional defects, outer surface defects, end face defects, and good products. If a pipe fitting has multiple defects, it is classified into the first-order defect category, and the order of the defect categories is preset in the system. Each sorting and unloading mechanism 162 can sort two types of materials, thus requiring two sets of sorting and unloading components, corresponding to two pusher cylinders 161 and four collection boxes 163. Obviously, the types of defects can be further refined, and a larger number of sorting and unloading components 16 can meet the needs of category sorting.

[0069] Specifically, such as Figure 14 and Figure 15As shown, the sorting and feeding mechanism 162 includes a sorting connecting plate 1621 fixedly connected to the side of the suspension beam 3, a clamping block 1622 fixedly disposed on the top of the sorting connecting plate 1621, two sorting and feeding channels 1623 fixedly clamped within the clamping block 1622, and a sorting and feeding port 1624 fixedly connected to the top of the sorting and feeding channels 1623. The sorting connecting plate 1621 is fixedly connected to the side wall of the mounting frame 2 by bolts. The clamping block 1622 is divided into a lower fixed clamping block and an upper movable clamping block. The two sorting and feeding channels 1623 are respectively placed in the fixed clamping block, and the movable clamping block presses on top of the sorting and feeding channels 1623. The movable clamping block and the fixed clamping block are connected by bolts to secure the sorting and feeding channels 1623. The bottom discharge ends of the two sorting and feeding channels 1623 are far apart from each other and are located above the corresponding collection boxes 163. When the pipe fitting 100 reaches the push-sorting working position of the push cylinder 161 after the inspection is completed, if the pipe fitting belongs to the classification range of the sorting and unloading component 16, the push cylinder 161 will work to push the pipe fitting 100 horizontally and detach it from the pipe fitting placement component 5 and enter the sorting and unloading port 1624.

[0070] A material distribution channel baffle 1625 is rotatably connected to the inner center of the sorting discharge port 1624. A sorting cylinder bracket 1626 is fixedly connected to the top surface of the sorting discharge port 1624. A sorting cylinder 1627 is rotatably connected to the sorting cylinder bracket 1626. A swing rod 1628 is rotatably connected to the output end of the sorting cylinder 1627. The other end of the swing rod 1628 is fixedly connected to one end of the rotating shaft of the material distribution channel baffle 1625. Thus, by the extension and retraction of the telescopic rod of the sorting cylinder 1627, the position of the material distribution channel baffle 1625 inside the sorting discharge port 1624 can be switched through the transmission of the swing rod 1628. This allows one sorting discharge channel 1623 to be in a conducting state, allowing the pipe 100 to enter the sorting discharge channel 1623, while the other sorting discharge channel 1623 is in a closed state, thus achieving channel selection.

[0071] During actual testing, a mark is made on one end of the outer cylindrical surface of the pipe fitting. This allows for precise and rapid identification of a specific pipe fitting from a pile of fittings, facilitating subsequent repair or process analysis. The testing process of this equipment is illustrated using the continuous testing of nine pipe fittings as an example:

[0072] The first product: This product is marked with serial number 1. After being inspected by the first camera component 6, the result is that the length is not up to standard. Regardless of whether the subsequent inspection results of other cameras are up to standard, the system records the appearance defect type of the product marked with serial number 1 as A, the total number of products inspected by the system is recorded as 1, and the number of appearance defect type A is 1.

[0073] The second product: This product is marked with serial number 2. It is qualified after being inspected by the first camera assembly 6. It is inspected by the second camera assembly 7 and the result is that there are scratches on the outer circular surface. Regardless of whether the subsequent inspection results of other cameras are qualified, the system records the appearance defect type of the product marked with serial number 2 as B, the total number of products inspected by the system is recorded as 2, and the number of appearance defect type B is 1.

[0074] The third product: This product is marked with serial number 3. It was inspected by the first camera assembly 6 and the second summing assembly 7 and both results were qualified. However, it was inspected by the third camera assembly 8 and the result was that there were grooves on the outer circular surface. Regardless of whether the subsequent inspection results of other cameras are qualified, the system records the appearance defect type of the product marked with serial number 3 as B, the total number of products inspected by the system is recorded as 3, and the number of appearance defect type B is 2.

[0075] The fourth product: This product is marked with serial number 4. It was inspected by the first camera assembly 6, the second summing assembly 7, and the third camera assembly 8, and the results were all qualified. However, it was inspected by the fourth camera assembly 9, and the result was that there was dirt on the outer circular surface. Regardless of whether the subsequent inspection results of other cameras are qualified, the system records the appearance defect type of the product marked with serial number 4 as B, the total number of products inspected by the system is recorded as 4, and the number of appearance defect type B is 3.

[0076] The fifth product: This product is marked with serial number 5. It was inspected by the first camera assembly 6, the second summing assembly 7, the third camera assembly 8, and the fourth camera assembly 9, and the results were all qualified. However, it was inspected by the fifth camera assembly 11, and the result was that the end outer diameter was unqualified. Regardless of whether the subsequent inspection results of other cameras are qualified, the system records the appearance defect type of the product marked with serial number 5 as A, the total number of products inspected by the system is recorded as 5, and the number of appearance defect type A is 2.

[0077] The sixth product: This product is marked with serial number 6. It was inspected by the first camera assembly 6, the second summing assembly 7, the third camera assembly 8, the fourth camera assembly 9, and the fifth camera assembly 11, and all of them were qualified. However, it was inspected by the sixth camera assembly 12 and the result was that there was a groove on the top of the end face, which was unqualified. Regardless of whether the subsequent inspection results of other cameras are qualified or not, the system records the appearance defect type of the product marked with serial number 6 as C, the total number of products inspected by the system is recorded as 6, and the number of appearance defect type C is 1.

[0078] The seventh product: This product is marked with serial number 7. It was inspected by the first camera assembly 6, the second summing assembly 7, the third camera assembly 8, the fourth camera assembly 9, the fifth camera assembly 11, and the sixth camera assembly 12, and the results were all qualified. However, it was inspected by the seventh camera assembly 14 and the result was that the end top scratch was unqualified. Therefore, regardless of whether the subsequent inspection results of other cameras are qualified, the system records the appearance defect type of the product marked with serial number 7 as C, the total number of products inspected by the system is recorded as 7, and the number of appearance defect type C is 2.

[0079] The eighth product: This product is marked with serial number 8. It was inspected by the first camera assembly 6, the second summing assembly 7, the third camera assembly 8, the fourth camera assembly 9, the fifth camera assembly 11, the sixth camera assembly 12, and the seventh camera assembly 14. All of them passed the inspection. However, it was inspected by the eighth camera assembly 15. The result was that the end inner diameter dimension was not qualified. The system recorded the appearance defect type of the product marked with serial number 8 as A. The total number of products inspected by the system was recorded as 8, and the number of appearance defect type A was 3.

[0080] The ninth product: This product is marked with serial number 8. It has been inspected by the first camera assembly 6, the second summing assembly 7, the third camera assembly 8, the fourth camera assembly 9, the fifth camera assembly 11, the sixth camera assembly 12, the seventh camera assembly 14, and the eighth camera assembly 15. All of them are qualified. The system records that the product marked with serial number 8 is a good product. The total number of products inspected by the system is recorded as 9, and the number of good products is 1.

[0081] In the aforementioned batch of inspections, a total of 9 products were inspected. The number of products with appearance defects of type A, type B, type C, and good quality were 3, 3, 2, and 1 respectively. The dimensional non-compliance rate was 3 / 9, the outer cylindrical surface non-compliance rate was 3 / 9, the end face non-compliance rate was 2 / 9, and the good product rate was 1 / 9. All image acquisition results, analysis results, and statistical data were displayed and updated in real time on the monitor.

[0082] Using the nine pipe fitting products with the above test results as examples, we will illustrate the sorting and collection process of this equipment.

[0083] For the pipe fitting product with serial number 1, since its appearance defect type is A, when it reaches the pushing position of the first pushing cylinder 161 (the distance between this position and the unloading position of the pipe fitting lowering counting component 17 is fixed), the pushing cylinder 161 works, pushing the pipe fitting product with serial number 1 into the corresponding sorting and unloading port 1624. At this time, the sorting channel baffle 1625 in the sorting and unloading port 1624 is located on the right side of the sorting and unloading port 1624, so that the sorting and unloading channel 1623 on the left side is in a conductive state. Then the pipe fitting product with serial number 1 enters the corresponding collection box 163 through the sorting and unloading channel 1623 on the left side.

[0084] For the pipe fitting product with serial number 2, since its appearance defect type is B, when it reaches the pushing position of the first pushing cylinder 161, the sorting cylinder 1627 corresponding to the pushing cylinder 161 works, pushing the sorting channel baffle 1625 to flip to the left side of the sorting discharge port 1624, thereby making the sorting discharge channel 1623 on the right side open. Then the pushing cylinder 161 works, pushing the pipe fitting product with serial number 2 into the corresponding sorting discharge port 1624. The pipe fitting product with serial number 2 then enters the corresponding collection box 163 through the sorting discharge channel 1623 on the right side.

[0085] Pipe fittings marked with serial number 3 and pipe fittings marked with serial number 4, since their appearance defect type is B, are sorted into the compatible collection box 163 in the same way as pipe fittings marked with serial number 2.

[0086] Pipe fittings with serial number 5, due to their appearance defect type A, are sorted into compatible collection box 163 using the same sorting method as pipe fittings with serial number 1.

[0087] For the pipe fitting product with serial number 6, since its appearance defect type is C, when it reaches the pushing position of the second pushing cylinder 161 (the distance between this position and the unloading position of the pipe fitting lowering counting component 17 is also fixed), the pushing cylinder 161 works to push the pipe fitting product with serial number 6 into the corresponding sorting and unloading port 1624. At this time, the sorting channel baffle 1625 in the sorting and unloading port 1624 is located on the right side of the sorting and unloading port 1624, so that the sorting and unloading channel 1623 on the left side is in a conductive state. Then the pipe fitting product with serial number 6 enters the corresponding collection box 163 through the sorting and unloading channel 1623 on the left side.

[0088] Pipe fittings with serial number 7, due to their appearance defect type C, are sorted into compatible collection box 163 using the same sorting method as pipe fittings with serial number 6.

[0089] Pipe fittings with serial number 8, due to their appearance defect type A, are sorted into compatible collection box 163 using the same sorting method as pipe fittings with serial number 1.

[0090] The pipe fitting product with serial number 9 is a good product. When it reaches the pushing position of the second pushing cylinder 161, the sorting cylinder 1627 corresponding to the pushing cylinder 161 works, pushing the sorting channel baffle 1625 to flip to the left side of the sorting discharge port 1624, so that the sorting discharge channel 1623 on the right side is in a conducting state. Then the pushing cylinder 161 works, pushing the pipe fitting product with serial number 9 into the corresponding sorting discharge port 1624. The pipe fitting product with serial number 9 then enters the corresponding collection box 163 through the sorting discharge channel 1623 on the right side.

[0091] After the above process, the automatic continuous feeding, automatic phase detection and automatic classification and collection of pipe fittings 100 are completed. The work efficiency is high, the appearance inspection is comprehensive and accurate, and the yield rate is well guaranteed.

[0092] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A pipe appearance defect detection device based on CCD visual detection, comprising a mounting base (1), a mounting frame (2) fixedly mounted on the top surface of the mounting base (1), a suspension beam (3) fixedly mounted on the top of the mounting frame (2) and arranged horizontally, and a chain plate conveyor (4) mounted on the outside of the suspension beam (3), characterized in that: The chain conveyor (4) has a pipe placement assembly (5) for placing pipe fittings (100) fixedly connected to the chain plate. The suspension beam (3) is sequentially fixedly installed with a pipe placement counting assembly (17), a first camera assembly (6), a second camera assembly (7), a third camera assembly (8), a fourth camera assembly (9), a first position adjustment assembly (10), a fifth camera assembly (11), a sixth camera assembly (12), a second position adjustment assembly (13), a seventh camera assembly (14), an eighth camera assembly (15), and a sorting and unloading assembly (16) along the conveying direction of the chain conveyor (4). The first camera assembly (6), the second camera assembly (7), the third camera assembly (8), and the fourth camera assembly (9) are all positioned vertically above the pipe placement assembly (5). The side wall of the suspension beam (3) is fixedly equipped with pipe actuation assemblies (19) respectively located below the first camera assembly (6), the second camera assembly (7), the third camera assembly (8), and the fourth camera assembly (9) and above the pipe placement assembly (5). The pipe actuation assemblies (19) cause the pipe (100) on the pipe placement assembly (5) to rotate along its own axis during the process, thereby adjusting its position by 90°. The fifth camera assembly (11) and the sixth camera assembly (12) are both located on one side of the pipe placement assembly (5). The first position adjustment assembly (10) guides and positions the pipe (100) placed on the pipe placement assembly (5) on that side. The seventh camera assembly (14) and the eighth camera assembly (15) are both located on the other side of the pipe placement assembly (5). The second position adjustment assembly (13) guides and positions the pipe (100) placed on the pipe placement assembly (5) on that side.

2. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The pipe placement assembly (5) includes a U-shaped frame plate (501) fixedly connected to the outer surface of the chain plate, two first mandrels (502) inserted into the side walls of both sides of the U-shaped frame plate (501), and a first support sleeve (503) rotatably sleeved on the outside of each first mandrel (502). The axes of the two first support sleeves (503) are located in the same horizontal plane and are symmetrically distributed on both sides of the side wall of the U-shaped frame plate (501). The pipe (100) is located between the top of the outer circular surface of the two first support sleeves (503).

3. The pipe appearance defect detection device based on CCD vision detection according to claim 2, characterized in that: At least one tensioning assembly (18) is fixedly connected to the side wall of the suspension beam (3). The tensioning assembly (18) includes a side plate (181) fixedly connected to the side wall of the suspension beam (3), a second spindle (182) inserted into the bottom end of the side plate (181) and located below the bottom of the chain conveyor (4), and a second support sleeve (183) rotatably sleeved on the outside of the second spindle (182). When the first support sleeve (503) moves above the second support sleeve (183), the outer circular surface of the first support sleeve (503) rolls into contact with the outer circular surface of the second support sleeve (183).

4. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The pipe fitting lowering counting assembly (17) includes a gantry plate (171) fixedly connected to both sides of the suspension beam (3) and located above the pipe fitting placement assembly (5), a feeding cylinder (172) fixedly installed on the top surface of the gantry plate (171), and a feeding guide plate (173) fixedly installed on the gantry plate (171) and located directly below the feeding cylinder (172). A feeding pusher (174) is fixedly connected to the bottom output end of the feeding cylinder (172). The guide plate (173) is inclined and its bottom end is located below the feeding push block (174) and has a feeding port (175) that matches the feeding push block (174). A sealing plate (178) located below the feeding port (175) is hinged to the bottom surface of the feeding guide plate (173). Guide side plates (176) are fixedly provided on both sides of the top surface of the feeding guide plate (173). A guide channel with a larger top and a smaller bottom and connected to the feeding port (175) is formed between the two guide side plates (176). A detection sensor (177) is fixedly installed on the inner wall of the two side plates of the gantry plate (171), located directly below the discharge port (175).

5. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The first position adjustment assembly (10) includes a first mounting bracket (101) fixedly installed on the side wall of the suspension beam (3) and a first guide plate (102) fixedly connected to the top of the first mounting bracket (101) and located directly above the pipe placement assembly (5). The bottom surface of the first guide plate (102) is provided with a first guide groove that is consistent with the travel direction of the pipe placement assembly (5). The first guide groove pushes the traveling pipe (100) towards the side of the pipe placement assembly (5) closer to the fifth camera assembly (11) and the sixth camera assembly (12).

6. The pipe appearance defect detection device based on CCD vision detection according to claim 1 or 5, characterized in that: The second position adjustment assembly (13) includes a second mounting bracket (131) fixedly mounted on the side wall of the suspension beam (3) and a second guide plate (132) fixedly connected to the top of the second mounting bracket (131) and located directly above the pipe placement assembly (5). The bottom surface of the second guide plate (132) is provided with a second guide groove that is consistent with the travel direction of the pipe placement assembly (5). The second guide groove pushes the traveling pipe (100) toward the side of the pipe placement assembly (5) close to the seventh camera assembly (14) and the eighth camera assembly (15).

7. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The sorting and feeding assembly (16) includes a pushing cylinder (161) disposed on one side above the pipe placement assembly (5), a sorting and feeding mechanism (162) disposed on the other side above the pipe placement assembly (5) and opposite to the pushing cylinder (161), and a plurality of collection boxes (163) disposed below the discharge end of the sorting and feeding mechanism (162). The pushing cylinder (161) selectively pushes the pipe (100) of the pipe placement assembly (5) into the sorting and feeding mechanism (162), and the sorting and feeding mechanism (162) selectively feeds the pipe (100) into one of the collection boxes (163).

8. The pipe appearance defect detection device based on CCD vision detection according to claim 7, characterized in that: The sorting and feeding mechanism (162) includes a sorting connecting plate (1621) fixedly connected to the side of the suspension beam (3), a clamping block (1622) fixedly disposed on the top of the sorting connecting plate (1621), two sorting and feeding channels (1623) fixedly clamped in the clamping block (1622), and a sorting and feeding port (1624) fixedly connected to the top of the sorting and feeding channel (1623). The inner side of the sorting and feeding port (1624) is... The part is rotatably connected to a material distribution channel baffle (1625). A sorting cylinder bracket (1626) is fixedly connected to the top surface of the sorting discharge port (1624). A sorting cylinder (1627) is rotatably connected to the sorting cylinder bracket (1626). A swing rod (1628) is rotatably connected to the output end of the sorting cylinder (1627). The other end of the swing rod (1628) is fixedly connected to one end of the rotating shaft of the material distribution channel baffle (1625).

9. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The first camera assembly (6) includes a first horizontal slide rail (601) fixedly mounted on the mounting bracket (2), a first vertical slide rail (602) slidably mounted on the top of the first horizontal slide rail (601), a first positioning block (603) and a second positioning block (605) slidably mounted on the side of the first vertical slide rail (602), a first camera (604) fixedly mounted on the side of the first positioning block (603), and a first supplementary lighting device (606) fixedly mounted on the side of the second positioning block (605). The image-taking end of the first camera (604) is vertically downward, and the first supplementary lighting device (606) is located directly below the first camera (604) and directly above the tube placement assembly (5).

10. The pipe appearance defect detection device based on CCD vision detection according to claim 1, characterized in that: The fifth camera assembly (11) includes a second vertical slide rail (111) fixedly mounted on the side of the suspension beam (3), a second horizontal slide rail (112) slidably mounted on the side of the second vertical slide rail (111), a third positioning block (113) and a fourth positioning block (114) slidably mounted on the top of the second horizontal slide rail (101), a fifth camera (115) fixedly mounted on the top of the third positioning block (113), and a second supplementary lighting device (116) fixedly mounted on the top of the fourth positioning block (144). The image-taking end of the fifth camera (115) faces the tube placement assembly (5), and the second supplementary lighting device (116) is located between the fifth camera (115) and the tube placement assembly (5).

Images