A batch appearance inspection equipment for bearing steel balls

Abstract

The present invention relates to a batch appearance inspection device for bearing steel balls applied in the technical field of inspection equipment. The position and angle of a coil group are adaptively adjusted by adjusting a motor and an adjusting rod so that the coil group can form an optimal match with the surfaces of bearing steel balls of different sizes. The left and right coil groups can generate a magnetic field so that the bearing steel balls can be suspended and rotated around an axis, thereby realizing non-contact all-round inspection. The device also integrates multi-frequency eddy current inspection and micro-nano probe scanning technology so that surface defects at the nanometer level can be precisely detected. A controller has a built-in machine learning algorithm so that the inspection data can be intelligently analyzed, defect types can be automatically identified, and three-dimensional defect images can be generated. The bearing steel balls are fed in through a feeding pipe, and after the surface is cleaned by the electromagnetic field generated by an oscillating coil, the bearing steel balls fall between the left and right coil groups. The coil group is adaptively adjusted so that the bearing steel balls can be suspended and rotated, and eddy current inspection is performed on them. If a suspected defect is found, the detection coil group will further scan and confirm it.

Description

Technical Field

[0001] The present invention relates to a batch appearance inspection device for bearing steel balls, and in particular to a batch appearance inspection device for bearing steel balls applied in the technical field of inspection devices. Background Art

[0002] As the core component of the bearing, the surface quality of the bearing steel ball directly affects the performance and life of the bearing. The traditional appearance inspection of the bearing steel ball mainly relies on manual visual inspection, which has problems such as low detection efficiency, poor accuracy, and susceptibility to subjective factors, and it is difficult to meet the needs of modern large-scale production. In addition to manual visual inspection, there are also some contact-type bearing steel ball appearance inspection methods in the prior art, such as probe method, contact eddy current detection, etc. These methods obtain surface information by directly contacting the probe or probe with the steel ball surface. Although the detection accuracy is improved to a certain extent, there are also obvious limitations. First, the direct contact between the probe or probe and the steel ball surface is easy to leave mechanical damage such as scratches and indentations on the steel ball surface, affecting the surface quality and performance of the steel ball. Secondly, the relative movement between the probe or probe and the steel ball surface during the detection process will cause wear and material transfer, which not only shortens the service life of the probe or probe, but also may introduce surface contamination, affecting the reliability of the detection results. In addition, contact detection usually requires a long signal acquisition and processing time, and the detection efficiency is relatively low, which is difficult to meet the high efficiency requirements of mass production of bearing steel balls.

[0003] Chinese invention patent CN104655060B discloses a device for detecting surface defects of steel balls. The device uses laser to irradiate the surface of steel balls to generate scattered light, and judges whether there are defects on the surface of steel balls by analyzing the image formed by the scattered light on a thin screen. The detection accuracy and efficiency of this method are improved compared with manual visual inspection, but there are still some shortcomings: first, the scattered light image is easily disturbed by factors such as pollution and oxidation on the surface of steel balls, which may lead to misjudgment; second, the image analysis algorithm is relatively simple and has limited ability to quantitatively describe defects; third, the entire detection process lacks sufficient automation. For example, the loading and unloading of steel balls still requires manual operation, which affects production efficiency.

[0004] Chinese invention patent CN116124795B discloses a fully automatic steel ball appearance inspection device, which is designed with components such as a conveyor belt, a lateral motion mechanism, and a material blocking rod, which can realize automatic loading and unloading and positioning of steel balls. At the same time, machine vision technology is used to detect the surface of the steel balls, which improves the degree of automation of detection to a certain extent, but there are also limitations: First, machine vision technology is mainly based on surface two-dimensional image information, and its ability to detect defects is limited, especially for small or hidden defects; second, the posture of the steel ball on the conveyor belt is difficult to control accurately, which may affect the quality of image acquisition; third, the production rhythm depends on the speed of the lateral motion mechanism, and the detection efficiency needs to be further improved.

[0005] In the bearing manufacturing industry, the quality of bearing steel balls is directly related to the company's product competitiveness and brand reputation. Carrying out 100% inspection of bearing steel balls and early detection and isolation of unqualified products are of great significance for improving product yield and reducing quality losses. Therefore, the industry urgently needs a batch appearance inspection equipment for bearing steel balls with high detection accuracy, high efficiency and high degree of automation to replace the traditional backward detection methods, thereby improving the intelligent level of the bearing manufacturing industry. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to achieve high-precision, high-efficiency and fully automatic detection of appearance defects of bearing steel balls, so as to improve the intelligent level of bearing steel ball production and product quality.

[0007] In order to solve the above problems, the present invention provides a batch appearance inspection device for bearing steel balls, comprising a controller and a left coil group and a right coil group that are symmetrically arranged on the left and right sides, the outer ends of the left coil group and the right coil group are respectively fixedly connected to a left adjustment frame and a right adjustment frame, the ends of the left adjustment frame and the right adjustment frame that are away from each other are fixedly connected to multiple outer adjustment rings and a middle adjustment ring, the outer ends of the multiple outer adjustment rings and the middle adjustment rings are respectively fixedly connected to an outer adjustment rod and a middle adjustment rod, the outer adjustment rods and the middle adjustment rods are horizontally distributed and parallel to each other, the ends of the outer adjustment rods and the middle adjustment rods are located on the same vertical plane, and the vertical plane is perpendicular to the length direction of the outer adjustment rods, one end of the multiple outer adjustment rods is fixedly connected to an outer adjustment motor, one end of the multiple middle adjustment rods is fixedly connected to a middle adjustment motor, the centers of the ends of the left adjustment frame and the right adjustment frame that are away from each other are fixedly connected to an inner adjustment rod, the ends of a pair of inner adjustment rods that are away from each other are fixedly connected to an inner adjustment motor, the outer adjustment motor, the middle adjustment motor and the inner adjustment motor are all linear motors, and the inner adjustment rods on the left adjustment frame and the right adjustment frame are respectively rotatably connected to the left detection coil group and the right detection coil group.

[0008] The above-mentioned batch appearance inspection equipment for bearing steel balls integrates technologies such as electromagnetic suspension, rotation, multi-frequency eddy current, and micro-nano probes, realizing non-contact, all-round, and refined defect detection of bearing steel balls. At the same time, the equipment adopts a modular and intelligent design, and has functions such as automatic loading and unloading of steel balls, surface adaptation, and intelligent defect recognition, which greatly improves the inspection efficiency and production rhythm. The electromagnetic suspension and rotation technologies are introduced into the appearance inspection of bearing steel balls to solve the problem that the traditional contact inspection is easy to damage the surface of the steel balls; integrated multi-frequency eddy current detection and micro-nano probe scanning realize the refined detection of surface and sub-surface defects; the machine learning algorithm is used to realize intelligent defect classification and three-dimensional reconstruction.

[0009] As a further improvement of the present application, the left detection coil group passes through the corresponding internal adjustment rod and the internal adjustment motor and extends to the outer end thereof, and the passing part is provided with a detection motor. The right detection coil group passes through the corresponding internal adjustment rod and the internal adjustment motor and extends to the outer end thereof, and the passing part is also provided with a detection motor.

[0010] As a further improvement of the present application, the power shafts of the two detection motors are fixedly connected to the left detection coil group and the right detection coil group respectively, and the top ends of the two outer adjustment motor movers located at the top are fixedly connected with pull rods.

[0011] As a further improvement of the present application, the ends of the two pull rods that are close to each other are fixedly connected to a partition, and the top ends of the pull rods and the partition are provided with grooves that are interconnected.

[0012] As another improvement of the present application, the outer ends of multiple external adjustment motors, middle adjustment motors and inner adjustment motors are fixedly connected to the same bracket, the two detection motor housings are fixedly connected to the bracket, and the top of the bracket is fixedly connected to a feed pipe and a discharge pipe.

[0013] As another improved supplement of the present application, the partition passes through the feed pipe and is slidably connected to the feed pipe. An oscillation coil is fixedly connected to the outer end of the feed pipe. A suction pipe is fixedly connected to the top of the pull rod at a position corresponding to the groove, and the suction pipe is connected to an external dust removal device.

[0014] As another improved supplement of the present application, the left coil group, the right coil group, the outer adjustment motor, the middle adjustment motor, the inner adjustment motor, the left detection coil group, the right detection coil group, the detection motor and the oscillation coil are all electrically connected to the controller, the left coil group and the right coil group each include multiple coils, and the left adjustment frame and the right adjustment frame are both made of flexible materials.

[0015] As another improvement of the present application, the left detection coil group and the right detection coil group both include a fixed rod, and a plurality of micro-nano coils are fixedly connected inside the fixed rod. The ends of the left adjustment frame and the right adjustment frame that are close to each other are provided with the same bearing steel ball, and the left adjustment frame and the right adjustment frame are both arc-shaped structures that match the outer ends of the bearing steel balls in a free state.

[0016] The left and right detection coil groups are also arc-shaped structures that match the outer ends of the bearing steel balls at one end near the bearing steel balls. The projections of the cross sections of the left and right adjustment frames along the direction perpendicular to the axis of the left detection coil group are cross structures.

[0017] The method of use includes the following steps:

[0018] S1: Put the bearing steel ball into the feeding tube from the top, and drive the oscillation coil at the outer end of the feeding tube through the controller, so that the oscillation coil generates a high-frequency oscillating electromagnetic field, and utilizes the induction effect between the electromagnetic field and the bearing steel ball to make the bearing steel ball oscillate at a high frequency, and remove impurities and dust attached to the surface of the steel ball through electromagnetic vibration, and collect the cleaned dust through the groove at the top of the partition and sucked away by the external dust removal equipment;

[0019] S2: After the bearing steel ball is cleaned, the outer adjustment motor at the top drives the left coil group, the right coil group, the left adjustment frame, the right adjustment frame and the pull rod to move to both sides, so that the partition and the top of the left adjustment frame and the right adjustment frame are opened, and the bearing steel ball falls into between the left coil group and the right coil group under the action of gravity;

[0020] S3: The left coil group, the right coil group, the left adjustment frame and the right adjustment frame are adjusted by multiple external adjustment motors, the middle adjustment motor and the internal adjustment motor, so that the left coil group and the right coil group better fit the surface of the steel ball and adapt to steel balls of different sizes;

[0021] S4: The controller energizes some coils of the left coil group and the right coil group, and uses the generated magnetic field to offset the gravity to suspend the steel ball, and generates a rotation torque by changing the current direction of some coils to rotate the steel ball around the axis;

[0022] S5: Use partial coils of the left coil group and the right coil group to perform multi-frequency eddy current testing on the suspended rotating bearing steel ball, and determine whether there are defects on the surface of the steel ball by measuring the change in coil impedance;

[0023] S6: When a possible defect is detected on the surface of the steel ball, the left detection coil group and the right detection coil group are driven by the detection motor to rotate around the steel ball, and the defect area is scanned with high resolution using a micro-nano probe;

[0024] S7: The controller collects eddy current signal data from multiple coils and performs data fusion, defect location, 3D modeling and other processing. It uses machine learning algorithms to automatically identify defect patterns, generate 3D images of defects, display and evaluate the surface quality of bearing steel balls in real time, and feed back the test results to the operator.

[0025] S8: After the detection is completed, the left coil group, the right coil group, the left adjustment frame and the right adjustment frame are adjusted by multiple external adjustment motors, the middle adjustment motor and the internal adjustment motor to make the steel ball fall.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. Full process automation. This equipment integrates various links such as loading, cleaning, testing, and unloading of bearing steel balls. Through the controller, it accurately controls various executive components such as oscillation coils, adjustment motors, coil groups, and detection coil groups, realizing full process automation from raw material input to finished product output, greatly improving production efficiency and reducing labor costs and error rates.

[0028] 2. Non-contact detection. This equipment adopts electromagnetic suspension and rotation technology, and uses the magnetic field generated by the coil group to suspend and rotate the bearing steel ball, realizing non-contact all-round detection of the surface of the bearing steel ball. This non-contact detection method effectively avoids secondary damage such as wear, scratches, and pollution to the surface of the bearing steel ball that may be caused by traditional contact detection, thereby ensuring the surface quality and performance of the bearing steel ball.

[0029] 3. Adaptive adjustment. The coil adjustment frame of this equipment is made of flexible material. By adjusting the coordination between the motor and the adjustment rod, the position and angle of the coil group can be flexibly adjusted. At the same time, the controller can automatically optimize the spatial configuration of the coil group according to the size parameters of the bearing steel ball, so that it forms the best match with the surface of the bearing steel ball. This adaptive adjustment mechanism makes this equipment compatible with bearing steel balls of different models and sizes, and has strong versatility and flexibility.

[0030] 4. Fine-grained defect detection. This equipment integrates two detection technologies: multi-frequency eddy current detection and micro-nano probe scanning. Among them, multi-frequency eddy current detection can detect defects on the surface and near-surface of bearing steel balls within different depth ranges, while micro-nano probes can perform high-resolution fine scanning of defective areas, and comprehensively and meticulously extract key parameters such as defect morphology, location, and type. The combination of the two detection technologies enables this equipment to detect surface defects from tiny to nanometer levels, greatly improving the defect detection rate and detection accuracy.

[0031] 5. Intelligent data analysis. The controller of this equipment has a built-in machine learning algorithm model. The controller can intelligently process the massive data obtained by eddy current testing and probe scanning, including data fusion, feature extraction, defect location, 3D reconstruction, etc., and automatically classify and identify defect types through algorithm models. This intelligent data analysis method can maximize the value of data and provide reliable data support for defect cause analysis, process parameter optimization, and quality prediction.

[0032] 6. Humanized interaction. The controller of this equipment is equipped with a humanized interactive interface, which can present the key parameters and results of the detection process to the operator in real time in intuitive forms such as charts and 3D models, and automatically generate detection reports according to preset rules. This friendly human-computer interaction method enables operators to control the detection process in a timely and accurate manner and respond quickly to abnormal situations. At the same time, detailed detection reports also lay the foundation for product quality traceability and data mining.

[0033] 7. Modular design. This equipment adopts modular and parametric design concepts. Each functional component is independently designed and has a standardized interface. It can be flexibly combined and configured according to actual needs. This modular design enables the equipment to adapt to different production scales and process requirements, improves the scalability, maintainability and upgradeability of the equipment, extends the service life of the equipment, and reduces the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the overall structure diagram of this application;

[0035] Figure 2 This is an overall exploded view of this application;

[0036] Figure 3 Partial explosion for this application Figure 1 ;

[0037] Figure 4 Partial explosion for this application Figure 2 ;

[0038] Figure 5 Partial explosion for this application Figure 3 ;

[0039] Figure 6 Partial explosion for this application Figure 4 ;

[0040] Figure 7 This is the appearance structure diagram of this application;

[0041] Figure 8 This is the front view of the application;

[0042] Fig. 9 For this application Figure 8 Middle AA section view;

[0043] Fig.10 For this application Fig. 9 Enlarged view of point B in the middle;

[0044] Fig.11 For this application Fig. 9 Enlarged view of point C in the middle;

[0045] Fig.12For this application Fig. 9 Enlarged view of point D in the middle.

[0046] Description of the numbers in the figure:

[0047] 1. Left coil group; 2. Right coil group; 3. Left adjustment frame; 4. Right adjustment frame; 5. Outer adjustment ring; 6. Middle adjustment ring; 7. Outer adjustment rod; 8. Middle adjustment rod; 9. Outer adjustment motor; 10. Middle adjustment motor; 11. Inner adjustment rod; 12. Inner adjustment motor; 13. Left detection coil group; 14. Right detection coil group; 15. Detection motor; 16. Pull rod; 17. Partition; 18. Bracket; 19. Feed pipe; 20. Oscillation coil. DETAILED DESCRIPTION

[0048] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0049] Example 1

[0050] A bearing steel ball batch appearance inspection device comprises a controller and a left coil group 1 and a right coil group 2 which are symmetrically arranged on the left and right.

[0051] like Figures 1 to 12 As shown, the outer ends of the left coil group 1 and the right coil group 2 are fixedly connected to the left adjustment frame 3 and the right adjustment frame 4 respectively. The left adjustment frame 3 and the right adjustment frame 4 are both made of flexible materials such as rubber. In the free state, they are both arc-shaped structures that match the outer ends of the bearing steel balls. The ends of the left adjustment frame 3 and the right adjustment frame 4 that are away from each other are fixedly connected to multiple outer adjustment rings 5 ​​and middle adjustment rings 6. The ends of the multiple outer adjustment rings 5 ​​that are away from the left adjustment frame 3 are rotatably connected to the outer adjustment rod 7, and the ends of the multiple middle adjustment rings 6 that are away from the right adjustment frame 4 are rotatably connected to the middle adjustment rod 8.

[0052] The ends of the outer adjusting rods 7 on the multiple left adjusting frames 3 that are away from each other are fixedly connected to the outer adjusting motor 9, the ends of the middle adjusting rods 8 on the multiple right adjusting frames 4 that are away from each other are fixedly connected to the middle adjusting motor 10, the centers of the ends of the left adjusting frames 3 and the right adjusting frames 4 that are away from each other are fixedly connected to the inner adjusting rod 11, the ends of the inner adjusting rods 11 on the left adjusting frames 3 and the right adjusting frames 4 that are away from each other are fixedly connected to the inner adjusting motor 12, the outer adjusting motor 9, the middle adjusting motor 10 and the inner adjusting motor 12 are all linear motors, the inner adjusting rods 11 on the left adjusting frames 3 and the right adjusting frames 4 are respectively rotatably connected to the left detection coil group 13 and the right detection coil group 14, the ends of the left detection coil group 13 and the right detection coil group 14 close to the bearing steel ball are also arc-shaped structures that match the outer ends of the bearing steel balls.

[0053] The left detection coil group 13 and the right detection coil group 14 respectively penetrate the inner adjustment rod 11 and the inner adjustment motor 12 on the left adjustment frame 3 and the right adjustment frame 4, and the left detection coil group 13 and the right detection coil group 14 penetrate the inner adjustment motor 12 and extend to its outer end, the left detection coil group 13 and the right detection coil group 14 both include a fixing rod, and a plurality of micro-nano coils are fixedly connected in the fixing rod, and a detection motor 15 is provided at the end of the inner adjustment motor 12 on the left adjustment frame 3 and the right adjustment frame 4 away from each other, and the power shafts of the two detection motors 15 are fixedly connected to the left detection coil group 13 and the right detection coil group 14 respectively.

[0054] The top ends of the movers of the two external adjustment motors 9 at the top are fixedly connected with pull rods 16, and the ends of the two pull rods 16 close to each other are fixedly connected with partitions 17. The top ends of the pull rods 16 and the partitions 17 are provided with grooves connected to each other.

[0055] The outer ends of the plurality of outer adjustment motors 9 , the middle adjustment motor 10 and the inner adjustment motor 12 are fixedly connected to the same bracket 18 , the shells of the two detection motors 15 are fixedly connected to the bracket 18 , and the top of the bracket 18 is fixedly connected to a feed pipe 19 and a discharge pipe.

[0056] The left coil group 1, the right coil group 2, the outer adjustment motor 9, the middle adjustment motor 10, the inner adjustment motor 12, the left detection coil group 13, the right detection coil group 14, and the detection motor 15 are all electrically connected to the controller. The left coil group 1 and the right coil group 2 each include multiple coils. The projection of the cross section of the left adjustment frame 3 and the right adjustment frame 4 along the direction perpendicular to the axis of the left detection coil group 13 is a cross structure.

[0057] The left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4 are adjusted by multiple external adjustment motors 9, the middle adjustment motor 10 and the internal adjustment motor 12, so that the left coil group 1 and the right coil group 2 can better fit the surface of the steel ball and adapt to steel balls of different sizes.

[0058] The controller energizes part of the coils of the left coil group 1 and the right coil group 2, and uses the generated magnetic field to offset gravity to suspend the steel ball, and generates a rotational torque to rotate the steel ball around the axis by changing the current direction of part of the coils. Multi-frequency eddy current detection is performed on the suspended and rotating bearing steel ball using part of the coils of the left coil group 1 and the right coil group 2, and whether there are defects on the surface of the steel ball is determined by measuring the change in coil impedance.

[0059] When possible defects are detected on the surface of the steel ball, the detection motor 15 drives the left detection coil group 13 and the right detection coil group 14 to rotate around the steel ball, and the micro-nano coil is used to perform high-resolution scanning of the defect area. The controller collects eddy current signal data from multiple coils and performs data fusion, defect location, three-dimensional modeling and other processing. The machine learning algorithm is used to automatically identify the defect mode, generate a three-dimensional image of the defect, display and evaluate the surface quality of the bearing steel ball in real time, and feed back the detection results to the operator.

[0060] The left coil group 1 and the right coil group 2 are used to generate a magnetic field to achieve suspension, rotation and eddy current detection of the bearing steel ball. The left adjustment frame 3 and the right adjustment frame 4 are used to support and adjust the positions of the left coil group 1 and the right coil group 2 so that they can better fit the surface of the bearing steel ball. They are made of flexible materials and have an arc-shaped structure that matches the outer end of the bearing steel ball in a free state, which can adapt to bearing steel balls of different sizes.

[0061] The outer adjustment ring 5 and the middle adjustment ring 6 are used to connect the left adjustment frame 3, the right adjustment frame 4 with the outer adjustment rod 7 and the middle adjustment rod 8, and allow the outer adjustment rod 7 and the middle adjustment rod 8 to rotate to achieve angle adjustment of the left coil group 1 and the right coil group 2. The outer adjustment rod 7 and the middle adjustment rod 8 are used to transmit the power of the outer adjustment motor 9 and the middle adjustment motor 10 to drive the left adjustment frame 3 and the right adjustment frame 4 to rotate and adjust the angle of the left coil group 1 and the right coil group 2. The outer adjustment motor 9 and the middle adjustment motor 10 are linear motors, which are used to drive the outer adjustment rod 7 and the middle adjustment rod 8 to adjust the angle of the left coil group 1 and the right coil group 2.

[0062] The inner adjustment rod 11 is used to connect the left adjustment frame 3, the right adjustment frame 4 and the inner adjustment motor 12 to transmit the power of the inner adjustment motor 12. The inner adjustment motor 12 is a linear motor used to drive the inner adjustment rod 11 to adjust the positions of the left coil group 1 and the right coil group 2.

[0063] The left detection coil group 13 and the right detection coil group 14 include multiple micro-nano coils, which are used to perform high-resolution scanning of areas where defects may exist. They are driven by the detection motor 15 and can rotate around the bearing steel ball. The detection motor 15 is used to drive the left detection coil group 13 and the right detection coil group 14 to rotate around the bearing steel ball to achieve fine scanning of the defective area.

[0064] The pull rod 16 is used to connect the external adjustment motor 9 and the partition plate 17 to transmit the power of the external adjustment motor 9.

[0065] The partition 17 is used to isolate the bearing steel balls in the feed pipe 19 to prevent the steel balls from falling during the detection process. It cooperates with the pull rod 16 and can be opened after the detection is completed to allow the bearing steel balls to pass through.

[0066] The bracket 18 is used to fix the outer adjustment motor 9, the middle adjustment motor 10, the inner adjustment motor 12 and the detection motor 15, and provide support for the entire device.

[0067] The feed pipe 19 is used to convey the bearing steel balls to be tested.

[0068] The discharge pipe is used to discharge the bearing steel balls after inspection.

[0069] The controller is used to control the operation of each motor and coil group, collect and process eddy current signal data, identify defects, generate three-dimensional images, and interact with operators.

[0070] The batch appearance inspection equipment for bearing steel balls provided in the present embodiment generates a magnetic field through the left coil group 1 and the right coil group 2, thereby realizing the suspension and rotation of the bearing steel balls, avoiding the contact between the bearing steel balls and other components, and ensuring the integrity of the surface of the bearing steel balls during the inspection process. In the present embodiment, the left adjustment frame 3 and the right adjustment frame 4 are made of flexible materials, and the precise adjustment of the position and angle of the left coil group 1 and the right coil group 2 is realized through multiple adjustment motors and adjustment rods, so that they can fit well with the surfaces of bearing steel balls of different sizes, thereby improving the adaptability and accuracy of the inspection. The present embodiment uses the left coil group 1 and the right coil group 2 to perform multi-frequency eddy current inspection on the suspended and rotating bearing steel balls. By measuring the change in coil impedance, it can be effectively determined whether there are defects on the surface of the steel balls, thereby realizing batch appearance inspection of bearing steel balls. When a possible defect is detected, the present embodiment uses The detection motor 15 drives the left detection coil group 13 and the right detection coil group 14 to perform high-resolution scanning of the defect area. The left detection coil group 13 and the right detection coil group 14 integrate multiple micro-nano coils, which can obtain more detailed defect information and improve the accuracy of detection. The controller of this embodiment can not only control the operation of each component, but also process the collected eddy current signal data, including data fusion, defect location, three-dimensional modeling, etc., and use machine learning algorithms to automatically identify defect patterns. This intelligent data processing method improves the efficiency and accuracy of defect identification and realizes the rapid and accurate detection of appearance defects of bearing steel balls. The controller of this embodiment can generate a three-dimensional image of the defect and display the surface quality evaluation results of the bearing steel balls in real time, providing intuitive detection feedback for operators, facilitating rapid identification and handling of problems, and improving production efficiency.

[0071] This embodiment has a compact overall structure and good fit between components, which realizes automated and batch appearance inspection of bearing steel balls, greatly improves inspection efficiency and accuracy, reduces the labor intensity and error rate of manual inspection, and has significant practical value.

[0072] Example 2

[0073] On the basis of Example 1, the partition 17 of this example passes through the feed pipe 19, and the partition 17 is slidably connected to the feed pipe 19, the outer end of the feed pipe 19 is fixedly connected to an oscillation coil 20, the top of the pull rod 16 is fixedly connected to the corresponding position of the groove with a straw, and the straw is connected to an external dust removal device.

[0074] like Figures 1 to 12 As shown, the partition 17 vertically penetrates the inner cavity of the feed pipe 19, dividing the feed pipe 19 into two parts, the upper and lower parts. The partition 17 and the feed pipe 19 are slidably connected and can move up and down in the feed pipe 19. The top of the partition 17 is connected to the pull rod 16, and the bottom end extends out of the feed pipe 19, flush with the top of the left adjustment frame 3 and the right adjustment frame 4. The top of the partition 17 is provided with a groove connected to the groove at the bottom end of the pull rod 16, forming a space for collecting impurities.

[0075] The oscillating coil 20 is fixed on the outer wall of the feeding pipe 19 and is coaxial with the feeding pipe 19. The oscillating coil 20 is electrically connected to the controller and can generate an alternating magnetic field under the drive of the controller.

[0076] A suction straw is fixedly connected to the top of the pull rod 16 and the corresponding position of the groove of the partition 17. One end of the suction straw extends into the groove formed by the partition 17 and the pull rod 16, and the other end is connected to the external dust removal equipment. The suction straw is made of flexible material and can move with the pull rod 16 and the partition 17.

[0077] When in use, the bearing steel ball to be tested is thrown in from the upper end of the feed pipe 19. The oscillation coil 20 generates an alternating magnetic field under the drive of the controller, applying a vibration force to the bearing steel ball. Under the action of electromagnetic vibration, impurities and dust attached to the surface of the bearing steel ball are shaken off and fall into the groove formed by the partition 17 and the pull rod 16.

[0078] At the same time, the suction tube continuously extracts the impurities and dust collected in the groove and transmits them to the external dust removal equipment, ensuring that the groove has enough space to continuously collect impurities.

[0079] Through the cooperation of the pull rod 16 and the external adjustment motor 9, the partition 17 can be controlled to move up and down in the feed pipe 19. When the cleaned bearing steel balls need to be delivered to the detection area, the partition 17 is controlled to move downward until it is flush with the top of the left adjustment frame 3 and the right adjustment frame 4. At this time, the bearing steel balls can fall into the detection area from the opening above the partition 17.

[0080] When a batch of bearing steel balls have been inspected, the control partition 17 is moved upward to block the bottom opening of the feed pipe 19. At the same time, the external adjustment motor 9 is used to drive the pull rod 16 and the partition 17 to move to both sides, so that the top openings of the left adjustment frame 3 and the right adjustment frame 4 are fully opened. At this time, the bearing steel balls that have been inspected can naturally fall into the discharge pipe from the top openings of the left adjustment frame 3 and the right adjustment frame 4, completing the entire inspection process.

[0081] The present embodiment utilizes an oscillating coil 20 to generate an alternating magnetic field, and applies a vibrating force to the bearing steel ball in the feed pipe 19, so that the impurities and dust attached to the surface are effectively removed and fall into the groove formed by the partition 17 and the pull rod 16. This non-contact cleaning method avoids secondary contamination or damage to the surface of the bearing steel ball that may be caused by mechanical cleaning. The present embodiment provides a connected groove on the pull rod 16 and the partition 17, and a suction pipe connected to an external dust removal device is provided in the groove, so that the impurities and dust cleaned from the surface of the bearing steel ball can be continuously and effectively extracted in time, ensuring that there is enough space above the partition 17 to continuously collect impurities, thereby improving the cleaning efficiency. The feed pipe 19 is separated into two independent upper and lower spaces by the partition 17, which can effectively control the timing and rate of the bearing steel balls entering the detection area. By controlling the up and down movement of the partition 17 and coordinating the lateral movement of the pull rod 16 and the external adjustment motor 9, the feeding of the bearing steel balls and the feeding of the cleaned bearing steel balls can be automatically realized without manual intervention, thereby improving the detection efficiency. This embodiment utilizes the coordination of the partition 17 and the left adjustment frame 3 and the right adjustment frame 4 to automatically open the bottom of the detection area after the detection is completed, so that the bearing steel balls that have been tested automatically fall into the discharge pipe, realizing the automatic unloading and transportation of the bearing steel balls, and further improving the automation and efficiency of the entire detection process.

[0082] This embodiment organically combines the cleaning, feeding, testing, and unloading processes of bearing steel balls, realizes automation and pollution-free processing of the entire process, greatly improves the efficiency and quality of bearing steel ball appearance inspection, reduces labor costs and error rates, and improves the production environment.

[0083] Example 3

[0084] like Figures 1 to 12 As shown, based on embodiments 1 and 2, this embodiment provides a method for using a bearing steel ball batch appearance inspection device, comprising the following steps:

[0085] S1: Put the bearing steel ball into the feed pipe 19 from the top, and drive the oscillation coil 20 at the outer end of the feed pipe 19 through the controller to make the oscillation coil 20 generate a high-frequency oscillating electromagnetic field. The induction effect between the electromagnetic field and the bearing steel ball is used to make the bearing steel ball oscillate at a high frequency. Impurities and dust attached to the surface of the steel ball are removed by electromagnetic vibration. The cleaned dust is collected through the groove at the top of the partition 17 and sucked away by an external dust removal device through a suction pipe.

[0086] S2: After the bearing steel balls are cleaned, the left coil group 1, the right coil group 2, the left adjustment frame 3, the right adjustment frame 4 and the pull rod 16 are driven to move to both sides by the external adjustment motor 9 at the top, so that the partition 17 and the top ends of the left adjustment frame 3 and the right adjustment frame 4 are opened, and the bearing steel balls fall into between the left coil group 1 and the right coil group 2 under the action of gravity.

[0087] S3: The left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4 are adjusted by multiple external adjustment motors 9, the middle adjustment motor 10 and the internal adjustment motor 12, so that the left coil group 1 and the right coil group 2 better fit the surface of the steel ball and adapt to steel balls of different sizes.

[0088] S4: The controller energizes some coils of the left coil group 1 and the right coil group 2, and uses the generated magnetic field to offset the gravity to suspend the steel ball, and generates a rotational torque by changing the current direction of some coils to rotate the steel ball around the axis.

[0089] S5: Use partial coils of the left coil group 1 and the right coil group 2 to perform multi-frequency eddy current detection on the suspended rotating bearing steel ball, and determine whether there are defects on the surface of the steel ball by measuring the change in coil impedance.

[0090] S6: When it is detected that there may be defects on the surface of the steel ball, the detection motor 15 drives the left detection coil group 13 and the right detection coil group 14 to rotate around the steel ball, and a micro-nano probe is used to perform high-resolution scanning on the defective area.

[0091] S7: The controller collects eddy current signal data from multiple coils and performs data fusion, defect location, 3D modeling and other processing. It uses machine learning algorithms to automatically identify defect patterns, generate 3D images of defects, display and evaluate the surface quality of bearing steel balls in real time, and feed back the test results to the operator.

[0092] S8: After the detection is completed, the left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4 are adjusted by multiple external adjustment motors 9, the middle adjustment motor 10 and the internal adjustment motor 12, so that the steel ball falls from between the left coil group 1 and the right coil group 2 to the discharge pipe, completing the entire detection process.

[0093] The controller first drives the oscillation coil 20 to generate a high-frequency oscillating electromagnetic field, and uses the induction effect between the electromagnetic field and the bearing steel ball to make the bearing steel ball inserted from the top of the feed pipe 19 oscillate at a high frequency, and remove impurities and dust attached to the surface of the steel ball through electromagnetic vibration. The cleaned dust is collected through the groove at the top of the partition 17 and sucked away by an external dust removal device through a suction pipe.

[0094] When the bearing steel balls are cleaned, the controller drives the external adjustment motor 9 to drive the left coil group 1, the right coil group 2, the left adjustment frame 3, the right adjustment frame 4 and the pull rod 16 to move to both sides, so that the partition 17 and the top ends of the left adjustment frame 3 and the right adjustment frame 4 are opened, allowing the cleaned bearing steel balls to fall into between the left coil group 1 and the right coil group 2 under the action of gravity.

[0095] The controller fine-tunes the positions and angles of the left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4 by adjusting the outer adjustment motor 9, the middle adjustment motor 10 and the inner adjustment motor 12, so that the left coil group 1 and the right coil group 2 fit well with the surface of the steel ball and adapt to steel balls of different sizes, thus preparing for subsequent detection.

[0096] After the adjustment is completed, the controller energizes part of the coils of the left coil group 1 and the right coil group 2, and uses the generated magnetic field to offset gravity to suspend the steel ball. At the same time, by changing the current direction of part of the coils, a rotational torque is generated to make the steel ball rotate around the axis, thereby achieving all-round detection.

[0097] When the bearing steel ball is suspended and rotating, the controller uses the other part of the coils of the left coil group 1 and the right coil group 2 to perform multi-frequency eddy current detection on it, and determines whether there are defects on the surface of the steel ball by measuring the change of coil impedance.

[0098] If possible defects are found on the surface of the steel ball during the eddy current detection process, the controller will immediately drive the left detection coil group 13 and the right detection coil group 14 to rotate around the suspicious area through the detection motor 15, and use the built-in micro-nano probe to perform high-resolution scanning on the defective area to obtain more detailed defect information.

[0099] During the entire detection process, the controller continuously collects eddy current signal data from multiple coils, and performs processes such as fusion, defect location, and three-dimensional modeling on the data. At the same time, the controller uses a preset machine learning algorithm to analyze the data, automatically identify different defect patterns, and generate intuitive three-dimensional defect images. The controller displays the surface quality assessment results of the bearing steel balls to the operator in real time, and feeds back detailed inspection report data to the host computer for quality analysis and process optimization.

[0100] When the detection of one bearing steel ball is completed, the controller again adjusts the outer adjustment motor 9, the middle adjustment motor 10 and the inner adjustment motor 12, and adjusts the positions and angles of the left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4, so that the bearing steel ball falls from between the left coil group 1 and the right coil group 2 to the discharge pipe. At the same time, the controller drives the partition 17 to reset, preparing for the detection of the next bearing steel ball.

[0101] The entire detection process is carried out under the automatic control of the controller without manual intervention, realizing efficient, intelligent and non-destructive detection of the appearance defects of bearing steel balls. The method of use of this embodiment realizes the full process automation of bearing steel balls from loading, cleaning, detection to unloading, and centrally controls each execution component through the controller, greatly improving the detection efficiency and reducing labor costs. This embodiment adopts electromagnetic suspension and rotation to realize non-contact detection of bearing steel balls, avoiding secondary pollution and damage to the surface of steel balls that may be caused by contact detection, and ensuring the non-destructiveness of the detection process. This embodiment uses the adaptive adjustment of the left coil group 1, the right coil group 2, the left adjustment frame 3 and the right adjustment frame 4 to flexibly adapt to bearing steel balls of different sizes, thereby improving the versatility and practicality of the equipment. The multi-frequency eddy current detection of this embodiment is combined with micro-nano probe scanning to comprehensively and finely detect various defects on the surface of bearing steel balls, greatly improving the defect detection rate and detection accuracy. This embodiment makes full use of machine learning algorithms to intelligently process detection data, realizes automatic identification and three-dimensional visualization of defect types, and provides intuitive and reliable data support for defect analysis and process improvement.

[0102] The controller of this embodiment can display the test results in real time and generate test reports, providing friendly and intuitive human-computer interaction for operators, and providing complete data support for quality traceability and big data analysis. This embodiment has strong flexibility and scalability through modular and parametric design. In actual production, the functions can be reduced or expanded according to needs to adapt to different application scenarios.

[0103] To sum up, the method of using the bearing steel ball batch appearance inspection equipment provided in this embodiment, with its highly automated, intelligent and refined characteristics, effectively solves the problems of low efficiency, poor accuracy and easy contamination of traditional manual inspection, and has significant practical application value in the quality control of bearing steel ball production.

[0104] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A batch appearance inspection device for bearing steel balls, characterized by: The invention comprises a controller and a left coil group (1) and a right coil group (2) which are symmetrically arranged on the left and right sides. The outer ends of the left coil group (1) and the right coil group (2) are respectively fixedly connected to a left adjustment frame (3) and a right adjustment frame (4). The ends of the left adjustment frame (3) and the right adjustment frame (4) which are away from each other are both fixedly connected to a plurality of outer adjustment rings (5) and a middle adjustment ring (6). The outer ends of the plurality of outer adjustment rings (5) and the middle adjustment rings (6) are respectively fixedly connected to an outer adjustment rod (7) and a middle adjustment rod (8). The outer adjustment rod (7) and the middle adjustment rod (8) are horizontally distributed and parallel to each other. The ends of the outer adjustment rod (7) and the middle adjustment rod (8) are located on the same vertical plane, and the vertical plane and the outer adjustment rod (7) The length direction is vertical, one end of each of the plurality of outer adjustment rods (7) is fixedly connected to an outer adjustment motor (9), one end of each of the plurality of middle adjustment rods (8) is fixedly connected to a middle adjustment motor (10), the centers of the ends of the left adjustment frame (3) and the right adjustment frame (4) that are away from each other are fixedly connected to an inner adjustment rod (11), and one end of each of the pair of inner adjustment rods (11) that are away from each other is fixedly connected to an inner adjustment motor (12), the outer adjustment motor (9), the middle adjustment motor (10) and the inner adjustment motor (12) are all linear motors, and the inner adjustment rods (11) on the left adjustment frame (3) and the right adjustment frame (4) are rotatably connected to a left detection coil group (13) and a right detection coil group (14) respectively; The left detection coil group (13) penetrates the corresponding inner adjustment rod (11) and the inner adjustment motor (12) and extends to the outer end thereof, and the penetration portion is provided with a detection motor (15); the right detection coil group (14) penetrates the corresponding inner adjustment rod (11) and the inner adjustment motor (12) and extends to the outer end thereof, and the penetration portion is also provided with a detection motor (15); the left detection coil group (13) and the right detection coil group (14) both include a fixing rod, and a plurality of micro-nano coils are fixedly connected in the fixing rod. The left adjustment frame (3) and the right adjustment frame (4) are provided with a same bearing steel ball at their ends close to each other, and the left adjustment frame (3) and the right adjustment frame (4) are both arc-shaped structures matching the outer end of the bearing steel ball in a free state, and the left detection coil group (13) and the right detection coil group (14) are also arc-shaped structures matching the outer end of the bearing steel ball at their ends close to the bearing steel ball, and the projection of the cross section of the left adjustment frame (3) and the right adjustment frame (4) along the direction perpendicular to the axis of the left detection coil group (13) is a cross structure.

2. The bearing steel ball batch appearance inspection equipment according to claim 1 is characterized by: The power shafts of the two detection motors (15) are fixedly connected to the left detection coil group (13) and the right detection coil group (14) respectively, and the top ends of the movers of the two external adjustment motors (9) located at the top are fixedly connected to pull rods (16).

3. The bearing steel ball batch appearance inspection equipment according to claim 2 is characterized by: The ends of the two pull rods (16) that are close to each other are fixedly connected to a partition plate (17), and the top ends of the pull rods (16) and the partition plate (17) are provided with grooves that are connected to each other.

4. The bearing steel ball batch appearance inspection equipment according to claim 3 is characterized by: The outer ends of the plurality of outer adjustment motors (9), the middle adjustment motors (10) and the inner adjustment motors (12) are fixedly connected to a same bracket (18), the shells of the two detection motors (15) are fixedly connected to the bracket (18), and the top end of the bracket (18) is fixedly connected to a feed pipe (19) and a discharge pipe.

5. The bearing steel ball batch appearance inspection device according to claim 4, characterized in that: The partition (17) passes through the feed pipe (19), and the partition (17) is slidably connected to the feed pipe (19). The outer end of the feed pipe (19) is fixedly connected to an oscillation coil (20). The top end of the pull rod (16) is fixedly connected to a suction pipe at a position corresponding to the groove, and the suction pipe is connected to an external dust removal device.

6. The bearing steel ball batch appearance inspection device according to claim 5, characterized in that: The left coil group (1), the right coil group (2), the outer adjustment motor (9), the middle adjustment motor (10), the inner adjustment motor (12), the left detection coil group (13), the right detection coil group (14), the detection motor (15) and the oscillation coil (20) are all electrically connected to a controller; the left coil group (1) and the right coil group (2) each include a plurality of coils; and the left adjustment frame (3) and the right adjustment frame (4) are both made of flexible materials.

7. The bearing steel ball batch appearance inspection device according to claim 6, characterized in that: The method of use includes the following steps: S1: a bearing steel ball is placed from the top of a feed pipe (19), and an oscillation coil (20) at the outer end of the feed pipe (19) is driven by a controller so that the oscillation coil (20) generates a high-frequency oscillating electromagnetic field, and the bearing steel ball is caused to oscillate at a high frequency by induction between the electromagnetic field and the bearing steel ball, and impurities and dust attached to the surface of the steel ball are removed by electromagnetic vibration, and the removed dust is collected through a groove at the top of a partition plate (17) and sucked away by an external dust removal device; S2: After the bearing steel balls are cleaned, the outer adjustment motor (9) at the top drives the left coil group (1), the right coil group (2), the left adjustment frame (3), the right adjustment frame (4) and the pull rod (16) to move to both sides, so that the partition (17) and the top ends of the left adjustment frame (3) and the right adjustment frame (4) are opened, and the bearing steel balls fall into between the left coil group (1) and the right coil group (2) under the action of gravity; S3: adjusting the left coil group (1), the right coil group (2), the left adjustment frame (3) and the right adjustment frame (4) through a plurality of external adjustment motors (9), a middle adjustment motor (10) and an internal adjustment motor (12) so that the left coil group (1) and the right coil group (2) better fit the surface of the steel ball and adapt to steel balls of different sizes; S4: energizing some coils of the left coil group (1) and the right coil group (2) through a controller, using the generated magnetic field to offset gravity so that the steel ball is suspended, and generating a rotational torque by changing the current direction of some coils so that the steel ball rotates around the axis; S5: using part of the coils of the left coil group (1) and the right coil group (2) to perform multi-frequency eddy current testing on the suspended rotating bearing steel ball, and determining whether there are defects on the surface of the steel ball by measuring the change in coil impedance; S6: When a possible defect is detected on the surface of the steel ball, the left detection coil group (13) and the right detection coil group (14) are driven by the detection motor (15) to rotate around the steel ball, and a micro-nano probe is used to perform a high-resolution scan of the defective area; S7: The controller collects eddy current signal data from multiple coils and performs data fusion, defect location, 3D modeling and other processing. It uses machine learning algorithms to automatically identify defect patterns, generate 3D images of defects, display and evaluate the surface quality of bearing steel balls in real time, and feed back the test results to the operator. S8: After the detection is completed, the left coil group (1), the right coil group (2), the left adjustment frame (3) and the right adjustment frame (4) are adjusted by a plurality of external adjustment motors (9), a middle adjustment motor (10) and an internal adjustment motor (12) to make the steel ball fall.

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