Ceramic ball surface defect detection apparatus and control method

Abstract

The application discloses a kind of ceramic ball surface defect detection equipment and control method, each half visual component is respectively corresponding to the upstream and downstream continuous multiple ball storage ports of linear motion component in the circumferential direction of conveying disc;The ceramic ball bottom is contacted with friction ring to make the ceramic ball overturn during the process that the ceramic ball surface defect detection equipment and control method provided by the application rotates, and the overturn of ceramic ball is carried out in the radial direction of conveying disc by linear motion component;The distance of ball storage port in the circumferential direction of conveying disc is the Nth of πA, after passing through N visual components, ceramic ball is tangentially overturned a circle in conveying disc, and the upstream N visual components and downstream N visual components of linear motion component can complete the image acquisition of entire ceramic ball circumferential direction;Ceramic ball is overturned with small angle between adjacent visual components, and the stepping speed can be greatly improved, and the detection efficiency of visual component is greatly improved;Finally, detection has the advantages of high efficiency, accuracy and non-destructive.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and in particular to a device and control method for detecting surface defects in ceramic balls. Background Technology

[0002] In the existing technology, benefiting from the rapid development of the new energy vehicle industry, the market for ceramic ball bearings is constantly expanding. Silicon nitride ceramic balls are an important component of ceramic ball bearings, possessing excellent properties such as low density, high strength, self-lubrication, friction resistance, high hardness and toughness, corrosion resistance, and non-magnetic insulation. Besides the new energy market, they are also widely used in precision fields such as aerospace and semiconductors, thus requiring extremely stringent surface quality standards for the ceramic balls. Surface defects of silicon nitride ceramic balls mainly manifest as snowflake spots, pits, cracks, scratches, and abrasions; these defects are typically at the micrometer level. Snowflake spots, in particular, may appear identical to qualified products in surface quality, but due to excessively rapid cooling during sintering, γ-phase silicon nitride is generated, reducing its density and increasing the risk of breakage. To ensure the quality of ceramic balls, most manufacturers use a combination of human eyes and microscopes to inspect surface defects. This method is not only inefficient, but the judgment results are also greatly influenced by the subjectivity of the inspectors. More importantly, prolonged exposure to strong light is detrimental to the eye health of the inspectors. Summary of the Invention Currently, there are automated devices that use image recognition to inspect spheres. The main body of the inspection device includes a rotating sample feeding device, an image recognition device, and a sphere position driving device. The rotating sample feeding device sequentially feeds the spheres in a circular pattern to the image recognition device. The sphere position driving device rotates the spheres to be tested in multiple directions, thus creating a complete image acquisition process on the sphere surface. The feeding mechanism of this device is connected to a feed turntable installed in the inspection tank via a feeding channel. The feed turntable has several inspection chambers around its circumference. A tray mainly provides support for the feed turntable, and the tray fits tightly against the end face of the unfolding turntable, with the tray flush with the upper surface of the unfolding turntable. The unfolding turntable reciprocates, causing the steel balls in the inspection chambers on the feed turntable to rotate one revolution, allowing the camera and other equipment to capture the entire surface of the steel balls, comprehensively inspecting surface defects. The process of developing the sphere surface needs to be executed perfectly, resulting in a relatively slow operation of the sphere position driving device and a relatively slow overall inspection efficiency. However, the large number of spheres makes it difficult to meet the demand for high-efficiency inspection. Improving the working efficiency of the ball position drive device is key to improving detection efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide a ceramic sphere surface defect detection device and control method, aiming to solve the problem of how to improve the efficiency of the sphere forming process.

[0004] To achieve the above objectives, the present invention provides a ceramic ball surface defect detection device for detecting ceramic balls, comprising: A motion generating assembly includes a conveyor disk assembly and a friction ring. The conveyor disk assembly includes a conveyor disk and a rotating motor that drives the conveyor disk. The conveyor disk has M ball-holding openings evenly arranged in the circumferential direction for placing ceramic balls. Each ball-holding opening is a spherical concave through hole with a diameter of A. The friction ring is arranged corresponding to the conveyor disk and has a clearance fit with the lower surface of the conveyor disk in the height direction. When the conveyor disk rotates, the bottom of the ceramic ball contacts the friction ring and flips over. A linear motion component is disposed above the conveyor disk. The linear motion component corresponds to the ball storage port and is located radially on the conveyor disk. The linear motion component includes a linear drive and a friction plate that drives the linear drive radially on the conveyor disk. The friction plate contacts the top of the ceramic ball and adjusts the ceramic ball radially on the conveyor disk. At least four vision components are disposed above the conveyor plate. Each vision component corresponds to a plurality of consecutive ball storage ports upstream and downstream of the linear motion component in the circumferential direction of the conveyor plate. The vision components are aligned with the ball storage ports. Each vision component includes a vision support and a camera and a light source mounted on the vision support. The number of vision components is 2N. The distance between the ball storage port and the circumferential direction of the transfer disk is one-Nth of πA.

[0005] Furthermore, the number of visual components is six.

[0006] Furthermore, the ceramic ball surface defect detection equipment also includes an oil supply assembly; the oil supply assembly includes an oil tank, a pipeline system, an oil pump, and a filter device, the oil pump controls the liquid level in the oil tank through the pipeline system, and the transfer plate is located below the liquid surface of the oil tank.

[0007] Furthermore, the ceramic ball surface defect detection equipment also includes a feeding assembly; the feeding assembly includes a collection bin, a material channel, and a diameter measuring assembly, the material channel leading out of the collection bin, and the diameter measuring assembly being set corresponding to the material channel.

[0008] Furthermore, the ceramic ball surface defect detection equipment also includes a lifting and sorting assembly; the lifting and sorting assembly includes a logic sorting device and two lifting synchronous belt assemblies disposed on both sides of the logic sorting device, the logic sorting device being disposed corresponding to the conveyor tray.

[0009] Furthermore, the friction ring is supported on the housing of the rotating motor.

[0010] Furthermore, the number of linear motion components is N, and the rotation angle of a single linear motion component on the ceramic ball is 90 / N.

[0011] The present invention also provides a control method applied to the above-mentioned ceramic ball surface defect detection equipment, comprising: S1. Control the rotating motor to complete one step and rotate the conveyor disk, wherein the angle of one step of the conveyor disk is 360 degrees of M. S2. Control all the aforementioned vision components to complete the sampling process; S3. Control the linear drive in the linear motion assembly to complete the work; S4. Repeat steps S1 to S3.

[0012] Furthermore, in step S4, the driving direction of the linear drive is reversed after N cycles.

[0013] Furthermore, in step S3, the linear drive travels a distance of πA divided by 4N in each cycle.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The ceramic ball surface defect detection device and control method provided by this invention, during the rotation of the conveyor disk, the bottom of the ceramic ball contacts the friction ring, causing the ceramic ball to flip. The direction of the ceramic ball flipping is tangential to the conveyor disk. The linear motion component performs the flipping of the ceramic ball radially on the conveyor disk. The distance of the ball storage port in the circumferential direction of the conveyor disk is 1 / N of πA. After passing through N vision components, the ceramic ball flips once tangentially on the conveyor disk. The N vision components upstream and downstream of the linear motion component can all complete the image acquisition of the entire circumferential direction of the ceramic ball. The above method of simultaneously flipping all ceramic balls circumferentially provides a basis for the installation of multiple vision components. Between adjacent vision components, the ceramic ball only moves at a small angle, so the stepping speed can be greatly improved, and the detection efficiency of the vision components can be greatly improved. The final detection has the advantages of high efficiency, accuracy and non-destructive performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the distribution of the motion generating component and the linear motion component on the conveyor plate in the ceramic ball surface defect detection device of the first embodiment of the present invention; Figure 2 yes Figure 1 A magnified view of a portion of the image; Figure 3 This is a schematic diagram of the ceramic ball surface defect detection device according to the first embodiment of the present invention; Figure 4 This is a schematic diagram of the lifting and sorting component in the ceramic ball surface defect detection device according to the second embodiment of the present invention; Figure 5This is a schematic diagram of a ceramic ball surface defect detection device according to the second embodiment of the present invention; Reference numerals: 100-Motion generating assembly, 110-Transfer disc assembly, 111-Rotating motor, 112-Transfer disc, 113-Ball storage port, 120-Friction ring, 200-Linear motion assembly, 210-Linear drive, 220-Friction plate, 300-Vision assembly, 310-Vision bracket, 320-Camera, 400-Oil supply assembly, 410-Oil tank, 500-Feeding assembly, 510-Collection bin, 520-Material channel, 530-Diameter measuring assembly, 600-Lifting and sorting assembly, 610-Logical sorting device, 620-Lifting synchronous belt assembly. Detailed Implementation

[0016] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0017] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any of the units and all combinations of one or more associated listed items.

[0018] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0019] Reference Figures 1 to 5 In one embodiment of the present invention, a ceramic ball surface defect detection device includes: The motion generating assembly 100 includes a conveyor disk assembly 110 and a friction ring 120. The conveyor disk assembly 110 includes a conveyor disk 112 and a rotating motor 111 that drives the conveyor disk 112. The conveyor disk 112 is uniformly provided with M ball storage openings 113 for placing ceramic balls in the circumferential direction. The ball storage openings 113 are spherical concave through holes with a diameter of A. The friction ring 120 is provided corresponding to the conveyor disk 112 and has a clearance fit with the lower surface of the conveyor disk 112 in the height direction. When the conveyor disk 112 rotates, the bottom of the ceramic ball contacts the friction ring 120 and flips over. A linear motion component 200 is disposed above the conveyor disk 112. The linear motion component 200 corresponds to the ball storage port 113 and is located radially on the conveyor disk 112. The linear motion component 200 includes a linear drive 210 and a friction plate 220 that drives the linear drive 210 radially on the conveyor disk 112. The friction plate 220 contacts the top of the ceramic ball and adjusts the ceramic ball radially on the conveyor disk 112. At least four vision components 300 are disposed above the conveyor plate 112. Each half of the vision components 300 corresponds to a plurality of consecutive ball storage ports 113 upstream and downstream of the linear motion component 200 in the circumferential direction of the conveyor plate 112. The vision components 300 are aligned with the ball storage ports 113. Each vision component 300 includes a vision support 310 and a camera 320 and a light source mounted on the vision support 310. The number of vision components 300 is 2N. The distance between the ball storage port 113 and the circumferential direction of the transfer disk 112 is one-Nth of πA.

[0020] In existing technologies, the process of forming the surface of a sphere needs to be executed perfectly, which makes the operation of the sphere position driving device slow and the overall detection efficiency relatively slow. However, the number of spheres is huge, making it difficult to meet the demand for efficient detection.

[0021] The ceramic ball surface defect detection device provided by the present invention is used to detect the surface quality of ceramic balls, including a motion generating component 100, a linear motion component 200 and at least four vision components 300.

[0022] The motion generating assembly 100 includes a conveyor plate assembly 110 and a friction ring 120. The conveyor plate assembly 110 includes a conveyor plate 112 and a rotating motor 111 that drives the conveyor plate 112. The conveyor plate 112 has M ball-holding openings 113 evenly arranged circumferentially for placing ceramic balls. For example, the conveyor plate 112 may have 36 ball-holding openings 113 evenly arranged; in other embodiments, it may have 18 or 72, depending on the size of the conveyor plate 112 and the size of the ceramic balls. The rotating motor 111 drives the conveyor plate 112 to move in steps, with the angular interval between adjacent ball-holding openings 113 on the circumferential direction of the conveyor plate 112 being a distribution angle. Each time the conveyor plate 112 is driven to rotate by one distribution angle. The ball-holding opening 113 is a spherical concave through-hole with a diameter of A. The ball-holding opening 113 stably supports the ceramic balls while the bottom of the ceramic balls is exposed through the ball-holding opening 113. The friction ring 120 is positioned corresponding to the conveyor disk 112 and is clearance-fitted with the lower surface of the conveyor disk 112 in the height direction. When the conveyor disk 112 rotates, the bottom of the ceramic ball contacts the friction ring 120 and flips over, with the direction of the ceramic ball flipping being tangential to the conveyor disk 112.

[0023] A linear motion assembly 200 is positioned above the conveyor plate 112. The linear motion assembly 200 does not rotate with the conveyor plate 112. The linear motion assembly 200 corresponds to the ball storage port 113 and is located radially on the conveyor plate 112. The linear motion assembly 200 includes a linear drive 210 and a friction plate 220 that drives the linear drive 210 radially on the conveyor plate 112. The friction plate 220 contacts the top of the ceramic ball and adjusts the ceramic ball radially on the conveyor plate 112, with the direction of ceramic ball rotation being radial to the conveyor plate 112. Multiple linear motion assemblies 200 can be used to rotate the ceramic ball in stages, improving work efficiency. All linear motion assemblies 200 together preferably rotate the ceramic ball by 30 to 120 degrees. It should be noted that the rotation of the ceramic ball by multiple linear motion assemblies 200 cannot be an integer multiple of 180 degrees. The friction ring 120 and the friction plate 220 are made of non-metallic material with a rough surface treatment, increasing friction while protecting the surface of the ceramic ball.

[0024] At least four vision components 300 are disposed above the conveyor plate 112. The number of vision components 300 is 2N. Each half of the vision components 300 corresponds to a plurality of consecutive ball storage ports 113 upstream and downstream of the linear motion component 200 in the circumferential direction of the conveyor plate 112. The vision components 300 are aligned with the ball storage ports 113. The vision component 300 includes a vision support 310 and a camera 320 and a light source mounted on the vision support 310. The camera 320 and the light source are mounted on the vision support 310. Due to the smooth surface of the ceramic ball, the intensity of ordinary ring light sources is too low to meet the shooting requirements. In order to meet the coupling requirements of the generating motion and the camera shutter, the light source preferably adopts three high-intensity point light sources to ensure the illumination intensity of the shooting surface below the camera 320. To adapt to the shooting of ceramic balls of different diameters, the light source can be designed with a manual adjustment device, which can realize the adjustment of the light source in front and behind, left and right, and tilt, so as to always ensure that its three point light sources are in the same plane.

[0025] The distance from the ball storage port 113 to the circumferential direction of the conveyor disk 112 is 1 / N of πA. After passing through N vision components 300, the ceramic ball rotates tangentially once around the conveyor disk 112. Therefore, the N vision components 300 upstream of the linear motion component 200 can acquire the image of the entire circumference of the ceramic ball; the N vision components 300 downstream of the linear motion component 200 can also acquire the image of the entire circumference of the ceramic ball. Since the linear motion component 200 performs a radial rotation of the ceramic ball on the conveyor disk 112, the upper N vision components 300 and lower N vision components 300 on both sides of the linear motion component 200 can jointly obtain complete unfolded image information.

[0026] A feeding component 500 can be installed at the input position of the conveyor plate 112, and a lifting and sorting component 600 can be installed at the output position of the conveyor plate 112. The lifting and sorting component 600 sorts and conveys the tested ceramic balls. The lifting and sorting component 600 includes a logic sorting device 610 and two lifting synchronous belt assemblies 620, with a roller track at the end of each lifting synchronous belt assembly 620. The lifting and sorting component 600 separates the tested ceramic balls into qualified and unqualified products and lifts them out. The logic sorting device 610 is controlled by a host computer and performs the sorting action via cylinders. The two lifting synchronous belt assemblies 620 are each driven by two motors, maintaining a constant speed. Specifically, when an oil supply component 400 is configured, oil leakage holes and oil leakage plates are provided at the plate of the lifting synchronous belt assembly 620 and in front of the roller track to ensure that the oil does not rise with the synchronous belt during the lifting process, maintaining the rolling and cleanliness of the material box. The sorting and conveying of tested ceramic balls is achieved through a lifting and sorting assembly 600. The lifting and sorting assembly 600 includes a logic sorting device 610 and two lifting synchronous belt assemblies 620, with a roller conveyor at the end of each assembly. The lifting and sorting assembly 600 separates the tested ceramic balls into qualified and unqualified products and lifts them out. The logic sorting device 610 is controlled by a host computer and performs the sorting action via cylinders. The two lifting synchronous belt assemblies 620 are each driven by a separate motor, maintaining a constant speed. Specifically, when an oil supply assembly 400 is included, oil leakage holes and oil leakage plates are provided at the plates of the lifting synchronous belt assemblies 620 and in front of the roller conveyors to ensure that the oil does not rise with the synchronous belts during the lifting process, maintaining the rolling motion and keeping the material box clean. In other embodiments, the feeding assembly 500 and the lifting and sorting assembly 600 can be various types of automated equipment, which are not the focus here.

[0027] During operation, the ball storage port 113 on the conveyor disk 112 is used to hold ceramic balls. The rotating motor 111 drives the conveyor disk 112 to transport ceramic balls in steps. The friction ring 120 is located below the conveyor disk 112. When the conveyor disk 112 rotates, the bottom of all ceramic balls contacts the friction ring 120 and flips in the tangential direction of the conveyor disk 112. The distance of the ball storage port 113 in the circumferential direction of the conveyor disk 112 is one-Nth of πA. After passing through N vision components 300, the ceramic ball flips once in the tangential direction of the conveyor disk 112. The N vision components 300 upstream and downstream of the linear motion component 200 can complete the image acquisition of the entire circumferential direction of the ceramic ball. The linear motion component 200 performs a radial flip of the ceramic ball on the conveyor disk 112, so the upper N vision components 300 and lower N vision components 300 on both sides can obtain complete unfolded image information. In a typical process, the circumferential image information of a specific ceramic ball is acquired through N upstream vision components 300; the ceramic ball is flipped in the tangential direction of the conveyor plate 112 and its spatial position is changed through all linear motion components 200; the circumferential image information of the ceramic ball after its spatial position change is acquired through N downstream vision components 300.

[0028] In summary, during the rotation of the conveyor disk 112, the bottom of the ceramic ball contacts the friction ring 120, causing the ceramic ball to flip. The direction of the ceramic ball's flip is tangential to the conveyor disk 112. The linear motion component 200 performs a radial flip on the ceramic ball on the conveyor disk 112. The distance of the ball storage port 113 from the circumference of the conveyor disk 112 is one-Nth of πA. After passing through N vision components 300, the ceramic ball flips once tangentially on the conveyor disk 112. Both the N vision components 300 upstream and downstream of the linear motion component 200 can complete the image acquisition of the entire circumference of the ceramic ball. The method of simultaneously flipping all ceramic balls circumferentially provides a basis for the installation of multiple vision components 300. Between adjacent vision components 300, the ceramic ball only moves at a small angle, thus significantly increasing the stepping speed and the detection efficiency of the vision components 300. Ultimately, the detection has the advantages of high efficiency, accuracy, and non-destructive testing.

[0029] Reference Figure 1 In one embodiment, the number of visual components 300 is six.

[0030] In this embodiment, three vision components 300 are located upstream of the linear motion component 200, and three vision components 300 are located downstream of the linear motion component 200. Each time the conveyor disk 112 advances, the displacement of the ball storage port 113 is one-third of A. After the conveyor disk 112 performs three advances, the ceramic ball has completed one revolution. Therefore, the circumferential detection of the ceramic ball is complete at the three vision components 300 upstream of the linear motion component 200, and the circumferential detection of the ceramic ball is complete at the three vision components 300 downstream of the linear motion component 200.

[0031] Reference Figure 3 In one embodiment, the ceramic ball surface defect detection device further includes an oil supply assembly 400; the oil supply assembly 400 includes an oil tank 410, a pipeline system, an oil pump and a filter device, the oil pump controls the liquid level in the oil tank 410 through the pipeline system, and the transfer plate 112 is located below the liquid surface of the oil tank 410.

[0032] In this embodiment, bearing mineral oil is injected into the oil tank 410, completely immersing the ceramic ball to be tested in the oil. The oil drain port ensures that the surface oil is constantly flowing, carrying away dust from the ceramic ball surface and improving the accuracy of the photograph. The oil drain port in the oil tank 410 allows the oil to continuously flow out, while the oil pump continuously pumps the filtered oil back into the oil tank 410.

[0033] Reference Figure 5 In one embodiment, the ceramic ball surface defect detection device further includes a feeding component 500; the feeding component 500 includes a collection bin 510, a material channel 520 and a diameter measuring component 530, the material channel 520 leads out of the collection bin 510, and the diameter measuring component 530 is set corresponding to the material channel 520.

[0034] In this embodiment, the collection bin 510 is used to hold the ceramic balls to be tested, and the collection bin 510 leads to the material channel 520, so that the ceramic balls can pass through the material channel 520 sequentially. The diameter measuring component 530 can perform particle size testing on the ceramic balls passing through the material channel 520, so that unqualified ceramic balls can be removed in advance. In a specific diameter measurement scheme, laser measurement is used. After the diameter test is completed, the data is fed back to the host computer, and the ball is carried out by the toothed disc. If the diameter does not meet the specifications, the first sorting port set on the material channel 520 opens, and the ball falls into the abnormal collection box. If it meets the specifications, it enters the motion generating component.

[0035] Reference Figures 4 to 5In one embodiment, the ceramic ball surface defect detection device further includes a lifting and sorting assembly 600; the lifting and sorting assembly 600 includes a logic sorting device 610 and two lifting synchronous belt assemblies 620 disposed on both sides of the logic sorting device 610, the logic sorting device 610 being disposed corresponding to the conveyor plate 112.

[0036] In this embodiment, the sorting and conveying of tested ceramic balls is achieved through a lifting and sorting assembly 600. The lifting and sorting assembly 600 includes a logic sorting device 610 and two lifting synchronous belt assemblies 620, with a roller conveyor at the end of each assembly. The lifting and sorting assembly 600 separates the tested ceramic balls into qualified and unqualified products and lifts them accordingly. The logic sorting device 610 is controlled by a host computer and performs the sorting action via cylinders. The two lifting synchronous belt assemblies 620 are each driven by a separate motor, maintaining a constant speed. Specifically, when an oil supply assembly 400 is included, oil leakage holes and oil leakage plates are provided at the plates of the lifting synchronous belt assemblies 620 and in front of the roller conveyors to ensure that the oil does not rise with the synchronous belts during the lifting process, maintaining the rolling motion and keeping the material box clean.

[0037] In one embodiment, the friction ring 120 is supported on the housing of the rotary motor 111.

[0038] In this embodiment, the friction ring 120 is supported at the rotating motor 111. For example, several support rods are connected to the housing of the rotating motor 111. The friction ring 120 is supported on the lower surface of the conveyor plate 112 by the support rods and is set corresponding to the ball storage port 113.

[0039] In one embodiment, the number of linear motion components 200 is N, and the rotation angle of a single linear motion component 200 on the ceramic ball is 90 / N.

[0040] In this embodiment, all linear motion components 200 together rotate the ceramic ball 90 degrees, thereby rotating the two ends of the ceramic ball upstream of the linear motion component 200 (radially upward of the conveyor disk 112) that are inconvenient for image acquisition to the middle, thus facilitating image acquisition by the vision component 300 downstream of the linear motion component 200.

[0041] The present invention also provides a control method applied to the above-mentioned ceramic ball surface defect detection equipment, comprising: S1. Control the rotating motor 111 to complete one step and rotate the conveyor disk 112, wherein the angle of one step of the conveyor disk 112 is 360 degrees of M. S2. Control all the vision components 300 to complete the sampling process; S3. Control the linear drive 210 in the linear motion assembly 200 to complete the work; S4. Repeat steps S1 to S3.

[0042] In this embodiment, in step S1, the rotating motor 111 is controlled to complete one step to rotate the conveyor disk 112. The angle of one step of the conveyor disk 112 is 360 degrees of M. At this time, the ball storage port 113 on the conveyor disk 112 gradually advances and alternately moves to the positions of the vision component 300 and the linear motion component 200.

[0043] In step S2, all the vision components 300 are controlled to complete the sampling process. The upstream N vision components 300 simultaneously perform image detection on the ceramic spheres below them, and the downstream N vision components 300 simultaneously perform image detection on the ceramic spheres below them.

[0044] In step S3, the linear drive 210 in the linear motion assembly 200 is controlled to complete its work, thereby causing the linear motion assembly 200 to flip its corresponding ceramic balls at a certain angle.

[0045] Repeating steps S1 to S3 allows for adjustment of the spatial position of the ceramic ball and completion of all image information acquisition. Through the upstream N vision components 300, circumferential image information of a specific ceramic ball is acquired; through all linear motion components 200, the ceramic ball is flipped in the tangential direction of the conveyor plate 112, thus changing its spatial position; through the downstream N vision components 300, circumferential image information of the ceramic ball after its spatial position change is acquired.

[0046] In one embodiment, in step S4, the driving direction of the linear drive 210 is reversed after N cycles.

[0047] In this embodiment, the ceramic ball can be flipped using both forward and reverse drives of the linear drive 210, reducing unnecessary working actions. If the linear drive 210 returns to its original position after each drive, the working time will be increased and the work efficiency will be reduced.

[0048] In one embodiment, in step S3, the linear drive 210 drives a distance of πA divided by 4N in each cycle.

[0049] In this embodiment, all linear motion components 200 together rotate the ceramic ball 90 degrees, thereby rotating the two ends of the ceramic ball upstream of the linear motion component 200 (radially upward of the conveyor disk 112) that are inconvenient for image acquisition to the middle, thus facilitating image acquisition by the vision component 300 downstream of the linear motion component 200.

[0050] In summary, the ceramic ball surface defect detection device and control method provided by this invention, during the rotation of the conveyor disk 112, causes the bottom of the ceramic ball to contact the friction ring 120, resulting in the ceramic ball flipping. The direction of the ceramic ball flipping is tangential to the conveyor disk 112. The linear motion component 200 performs the radial flipping of the ceramic ball on the conveyor disk 112. The distance of the ball storage port 113 from the circumference of the conveyor disk 112 is one-Nth of πA. After passing through N vision components 300, the ceramic ball flips once tangentially on the conveyor disk 112. The N vision components 300 upstream and downstream of the linear motion component 200 can all complete the image acquisition of the entire circumference of the ceramic ball. The method of simultaneously flipping all ceramic balls circumferentially provides a basis for the installation of multiple vision components 300. Between adjacent vision components 300, the ceramic ball only moves at a small angle, so the stepping speed can be greatly improved, and the detection efficiency of the vision components 300 can be greatly improved. Finally, the detection has the advantages of high efficiency, accuracy and non-destructive performance.

[0051] The above description is merely a preferred 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 ceramic ball surface defect detection device, used for detecting ceramic balls, characterized in that, include: A motion generating assembly includes a conveyor disk assembly and a friction ring. The conveyor disk assembly includes a conveyor disk and a rotating motor that drives the conveyor disk. The conveyor disk has M ball-holding openings evenly arranged in the circumferential direction for placing ceramic balls. Each ball-holding opening is a spherical concave through hole with a diameter of A. The friction ring is arranged corresponding to the conveyor disk and has a clearance fit with the lower surface of the conveyor disk in the height direction. When the conveyor disk rotates, the bottom of the ceramic ball contacts the friction ring and flips over. A linear motion component is disposed above the conveyor disk. The linear motion component corresponds to the ball storage port and is located radially on the conveyor disk. The linear motion component includes a linear drive and a friction plate that drives the linear drive radially on the conveyor disk. The friction plate contacts the top of the ceramic ball and adjusts the ceramic ball radially on the conveyor disk. At least four vision components are disposed above the conveyor plate. Each vision component corresponds to a plurality of consecutive ball storage ports upstream and downstream of the linear motion component in the circumferential direction of the conveyor plate. The vision components are aligned with the ball storage ports. Each vision component includes a vision support and a camera and a light source mounted on the vision support. The number of vision components is 2N. The distance between the ball storage port and the circumferential direction of the transfer disk is one-Nth of πA.

2. The ceramic ball surface defect detection device according to claim 1, characterized in that, The number of visual components is six.

3. The ceramic sphere surface defect detection device according to claim 1, characterized in that, The ceramic ball surface defect detection equipment also includes an oil supply assembly; the oil supply assembly includes an oil tank, a pipeline system, an oil pump, and a filter device, the oil pump controls the liquid level in the oil tank through the pipeline system, and the transfer plate is located below the liquid level in the oil tank.

4. The ceramic ball surface defect detection device according to claim 1, characterized in that, The ceramic ball surface defect detection equipment also includes a feeding component; the feeding component includes a collection bin, a material channel and a diameter measuring component, the material channel leads out of the collection bin, and the diameter measuring component is set corresponding to the material channel.

5. The ceramic sphere surface defect detection device according to claim 1, characterized in that, The ceramic ball surface defect detection equipment also includes a lifting and sorting assembly; the lifting and sorting assembly includes a logic sorting device and two lifting synchronous belt assemblies arranged on both sides of the logic sorting device, the logic sorting device being arranged corresponding to the conveyor tray.

6. The ceramic ball surface defect detection device according to claim 1, characterized in that, The friction ring is supported on the housing of the rotating motor.

7. The ceramic sphere surface defect detection device according to claim 1, characterized in that, The number of linear motion components is N, and the rotation angle of a single linear motion component on the ceramic ball is 90 / N.

8. A control method applied to the ceramic sphere surface defect detection device according to any one of claims 1 to 7, characterized in that, include: S1. Control the rotating motor to complete one step and rotate the conveyor disk, wherein the angle of one step of the conveyor disk is 360 degrees of M. S2. Control all the aforementioned vision components to complete the sampling process; S3. Control the linear drive in the linear motion assembly to complete the work; S4. Repeat steps S1 to S3.

9. The control method according to claim 8, characterized in that, In step S4, the driving direction of the linear drive is reversed after N cycles.

10. The control method according to claim 9, characterized in that, In step S3, the linear drive travels a distance of πA divided by 4N in each cycle.

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