A kind of eddy current testing device for steel ball machining

Abstract

The utility model discloses a kind of eddy current detection devices for steel ball processing, including feeding mechanism and distributing mechanism, distributing mechanism includes rack, distributing bin, distributing support plate and distributing push plate;Distributing bin is equipped with material moving passage, the bottom of distributing bin is provided with multiple distributing ports, distributing port is connected with annular eddy current instrument;Distributing support plate is horizontally arranged in the inside of distributing bin, distributing support plate is provided with distributing groove corresponding to each distributing port, the size of multiple distributing grooves gradually increases along clockwise;The number of distributing push plate is same with the number of distributing groove and one-to-one correspondence, the center of distributing support plate is equipped with rotating shaft, feeding mechanism is located above the space formed by the largest slot and smallest slot distributing groove in all distributing groove, by the design of rotating push of distributing push plate, distributing groove is adapted according to diameter gradient, different diameter steel ball can be automatically accurately sorted to corresponding channel, without manual sorting.

Description

Technical Field

[0001] This utility model relates to the field of steel ball processing technology, specifically to an eddy current detection device for steel ball processing. Background Technology

[0002] In fields such as machinery manufacturing and bearing industry, steel balls are core transmission components. The surface quality of steel balls, such as cracks and scratches, and internal defects, such as inclusions and porosity, directly affect the operating accuracy and service life of the entire machine. Therefore, after processing, steel balls need to be screened for quality using non-destructive testing methods such as eddy current testing. Eddy current testing has become one of the mainstream technologies for steel ball quality inspection due to its fast response speed and sensitivity to metal defects.

[0003] In the prior art, for example, Chinese invention patent application (publication number CN115808464A) discloses an automatic eddy current testing machine for steel balls and its testing method. It includes a frame and a receiving platform disposed below the frame, as well as a rotating material distribution mechanism, a feeding mechanism, and an eddy current testing mechanism disposed on the frame. The rotating material distribution mechanism includes a pallet fixed to the frame, a rotating plate rotatably connected to the pallet, and a drive assembly for driving the rotating plate to rotate. Multiple steel ball sorting slots of different diameters are radially arranged on the rotating plate, and multiple steel ball dropping slots are arranged on the pallet. The feeding mechanism and the eddy current testing mechanism can move radially along the pallet, respectively. A plug for sealing is detachably connected to the steel ball sorting slot in the non-sorting state. The advantage of this prior art is that it does not require driving the steel balls to rotate; the steel balls pass through the eddy current testing mechanism to complete the testing, offering advantages of high testing accuracy and efficiency. It is also applicable to the testing of steel balls of different diameters.

[0004] However, the aforementioned existing technologies still have the following problems in the detection process: In the detection mode, steel balls of different diameters must first be sorted and classified manually or with simple equipment, and then put into the corresponding eddy current detection device. The process is cumbersome and prone to errors due to manual operation, making it difficult to meet the needs of large-scale production.

[0005] Therefore, we need to develop an eddy current detection device that can automatically sort and adapt to steel balls of various sizes. Utility Model Content

[0006] To address the aforementioned issues, an eddy current detection device for steel ball processing is provided. Through the rotation and pushing of the material distribution plate and the design of the material distribution groove adapted according to the diameter gradient, steel balls of different diameters can be automatically and accurately sorted into the corresponding channels without the need for manual sorting.

[0007] To address the existing technical problems, this utility model provides an eddy current detection device for steel ball processing, including a feeding mechanism and a distributing mechanism located beside the feeding mechanism. The distributing mechanism includes a frame, a distributing bin, a distributing tray, and a distributing pusher. The material distribution bin is mounted vertically on the frame. The material distribution bin has a funnel-shaped material transfer channel. The top of the material distribution bin is open and the bottom of the material distribution bin is closed. The bottom of the material distribution bin has multiple material distribution ports that are equidistantly distributed along the circumference of the material distribution bin. The material distribution ports are connected to an annular eddy current meter. The material distribution tray is horizontally set inside the material distribution bin. The material distribution tray is disc-shaped and has material distribution slots that correspond to each material distribution port. The size of the slots gradually increases clockwise. The number of material distribution push plates is the same as the number of material distribution slots and they correspond one-to-one. Adjacent material distribution push plates form a space to accommodate steel balls. The center of the material distribution tray is provided with a rotating shaft that can drive all material distribution push plates to rotate clockwise around the center of the material distribution tray. In the initial state of the material distribution tray, the material distribution push plates can block the corresponding material distribution slots. The feeding mechanism is located above the space formed by the largest and smallest slots among all material distribution slots.

[0008] Preferably, a vibrator is installed at the bottom of the material distribution bin, and extension plates are equidistantly distributed along the circumference of the material distribution bin. The frame is equipped with the same number of buffer springs as the extension plates, and the output end of the buffer springs is connected to the extension plates.

[0009] Preferably, a rotating collar is provided above the material distribution bin, an annular slide rail is arranged around the top of the material distribution bin, an annular slider is provided at the bottom of the rotating collar and slides with the annular slide rail, and the end of the material distribution push plate away from the rotating shaft is fixedly connected to the inner side wall of the annular collar.

[0010] Preferably, the height of the material distribution pusher plate and the rotating collar is greater than the height of the steel ball with the largest diameter.

[0011] Preferably, the bottom of the material distribution tray is provided with an inclined slide corresponding to each material distribution trough, and a partition is provided at the end of the inclined slide. The partition and the inclined slide cooperate to form a channel to guide the movement of steel balls of different diameters.

[0012] Preferably, the sealing tray has a curved edge at the top edge of each dispensing slot.

[0013] Preferably, a cover plate is horizontally provided above the material distribution bin, and there is a gap between the cover plate and the material distribution bin. An opening is provided on the cover plate to allow the feeding mechanism to feed material onto the material distribution tray. A support seat is provided on the frame to connect the cover plate.

[0014] Preferably, a servo motor is installed directly above the material distribution bin. The output shaft of the servo motor passes through the cover plate and is connected to one end of the rotating shaft. The servo motor is connected to the support base through a bracket.

[0015] The advantages of this utility model compared to the prior art are: 1. This utility model uses a rotating pusher plate and a design that adapts the material distribution groove according to the diameter gradient to automatically and accurately sort steel balls of different diameters into the corresponding channels without the need for manual sorting.

[0016] 2. This utility model, through the seamless connection of the inclined slide, the material distribution port and the annular vortex meter, allows the sorted steel balls to directly enter the testing stage, reducing intermediate transfer steps. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an eddy current detection device for steel ball processing according to this utility model.

[0018] Figure 2 This is a partial top view of an eddy current detection device for steel ball processing according to this utility model.

[0019] Figure 3 yes Figure 2 Sectional view along the middle AA.

[0020] Figure 4 This is a partial three-dimensional structural diagram of an eddy current detection device for steel ball processing according to this utility model. Figure 1 .

[0021] Figure 5 This is a partial three-dimensional structural diagram of an eddy current detection device for steel ball processing according to this utility model. Figure 2 .

[0022] Figure 6 This is a partial breakdown of the material distribution mechanism of an eddy current detection device for steel ball processing according to this utility model. Figure 1 .

[0023] Figure 7 This is a partial breakdown of the material distribution mechanism of an eddy current detection device for steel ball processing according to this utility model. Figure 2 .

[0024] Figure 8 This is a partial perspective view of the material distribution mechanism of an eddy current detection device for steel ball processing according to this utility model.

[0025] The following are the labels in the diagram: 1. Feeding mechanism; 2. Distributing mechanism; 21. Frame; 22. Distributing bin; 221. Distributing port; 222. Vibrator; 223. Extension plate; 224. Buffer spring; 23. Distributing support plate; 231. Distributing trough; 2311. Inclined slide; 2312. Partition plate; 2313. Curvature; 24. Distributing push plate; 241. Rotating collar; 242. Circular track; 243. Circular slider; 25. Rotating shaft; 26. Cover plate; 261. Clearance opening; 262. Support base; 27. Servo motor; 3. Circular eddy current meter. Detailed Implementation

[0026] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0027] Reference Figures 1-8 As shown: An eddy current detection device for steel ball processing includes a feeding mechanism 1 and a distributing mechanism 2 located beside the feeding mechanism 1. The distributing mechanism 2 includes a frame 21, a distributing bin 22, a distributing tray 23, and a distributing pusher 24. The material distribution bin 22 is mounted on the frame 21 and can move up and down. The material distribution bin 22 is equipped with a funnel-shaped material transfer channel. The top of the material distribution bin 22 is open and the bottom of the material distribution bin 22 is closed. The bottom of the material distribution bin 22 is additionally provided with multiple material distribution ports 221 that are equidistantly distributed along the circumference of the material distribution bin 22. The material distribution ports 221 are connected to the annular eddy current meter 3. The material distribution tray 23 is horizontally arranged inside the material distribution bin 22. The material distribution tray 23 is disc-shaped and has material distribution grooves 231 that correspond one-to-one with each material distribution port 221. The size of the grooves of the multiple material distribution grooves 231 gradually increases clockwise. The number of material distribution push plates 24 is the same as the number of material distribution grooves 231 and they correspond one-to-one. Adjacent material distribution push plates 24 form a space for accommodating steel balls. The center of the material distribution tray 23 is provided with a rotating shaft 25 that can drive all material distribution push plates 24 to rotate clockwise around the center of the material distribution tray 23. In the initial state of the material distribution tray 23, the material distribution push plates 24 can block the corresponding material distribution grooves 231. The feeding mechanism 1 is located above the space formed by the largest and smallest opening of the material distribution grooves 231.

[0028] When the material distribution mechanism 2 is in its initial state, the material distribution push plate 24 is tightly attached to the surface of the material distribution tray 23, sealing the openings of all material distribution slots 231; a closed receiving space is formed between adjacent material distribution push plates 24, and the feeding mechanism 1 is located above the receiving space between the largest opening material distribution slot 231 and the smallest opening material distribution slot 231, in preparation for receiving steel balls. The feeding mechanism 1 transports the steel balls to be tested to the distributing mechanism 2. The steel balls fall into the receiving space formed between the largest and smallest slot distributing slots 231 on the distributing tray 23 under the action of gravity, thus completing the initial loading of the steel balls to be tested. The rotating shaft 25 at the center of the material distribution tray 23 is started, which drives all the material distribution push plates 24 to rotate clockwise synchronously around the center of the material distribution tray 23. Since the size of the slot opening of the material distribution groove 231 gradually increases in the clockwise direction, that is, it is distributed from the smallest slot opening to the largest slot opening in sequence, and the material distribution push plates 24 will push the steel balls in the accommodating space to move clockwise synchronously when rotating with the rotating shaft 25. When the steel ball is pushed to the position of the material distribution groove 231 that matches its own diameter, the material distribution push plate 24 has been disengaged from the blocking state of the material distribution groove 231 as it rotates. The steel ball falls into the corresponding material distribution groove 231 under the action of gravity. The small diameter steel ball falls into the material distribution groove 231 with the smaller opening first, and the large diameter steel ball continues to move with the push plate until it falls into the matching material distribution groove 231 with the larger opening. The rotation of the material distribution push plate 24 continuously pushes the steel balls that have not fallen into the material distribution trough 231, ensuring that all steel balls can enter the corresponding material distribution trough 231 according to their diameter, thus achieving automatic sorting. The steel balls falling into the distribution trough 231 are guided by the funnel-shaped material transfer channel of the distribution bin 22. The distribution bin 22 can adjust the gap with the distribution support plate 23 by moving up and down, assisting the steel balls to slide down. They enter the annular eddy current analyzer 3 through the distribution ports 221 at the bottom of the distribution bin 22, which correspond one-to-one with the distribution trough 231. The annular eddy current analyzer 3 performs eddy current testing on the steel balls as they pass through, such as detecting surface or internal defects, thus completing the testing process.

[0029] In summary, through the continuous actions of rotating and pushing the material distribution plate 24, sorting the material distribution trough 231 according to diameter gradient, guiding the material transfer channel, and detecting with the annular eddy current meter 3, the automatic diameter adaptation and eddy current detection of steel balls are integrated, eliminating the need for additional manual sorting and improving detection efficiency and adaptability.

[0030] Reference Figures 3 to 5 As shown: a vibrator 222 is installed at the bottom of the material distribution bin 22, and extension plates 223 are equidistantly distributed along the circumference of the material distribution bin 22. The frame 21 is equipped with the same number of buffer springs 224 as the extension plates 223, and the output end of the buffer springs 224 is connected to the extension plates 223.

[0031] When the vibrator 222 at the bottom of the material distribution bin 22 is started, it will generate continuous mechanical vibration and transmit the vibration to the entire material distribution bin 22. The vibration energy acts on the material transfer channel inside the material distribution bin 22, the material distribution groove 231 on the material distribution tray 23 and the steel balls in the holding space, which can effectively break the static friction and jamming state between the steel balls. The energy of vibration acts on the material transfer channel inside the material distribution bin 22, the material distribution groove 231 on the material distribution tray 23, and the steel balls in the accommodating space, which can effectively break the static friction and jamming between the steel balls. For steel balls on the distribution pallet 23 that have not entered the distribution groove 231, vibration can help the distribution pusher 24 to push the steel balls to move more smoothly, reduce the adhesion between the steel balls and the surface of the distribution pallet 23, and ensure that the steel balls accurately enter the corresponding distribution groove 231 according to the diameter gradient. When the vibrator 222 drives the material distribution bin 22 to vibrate, the buffer spring 224 will elastically expand and contract with the vibration of the material distribution bin 22. On the one hand, it absorbs vibration energy and reduces the rigid impact of the vibration of the material distribution bin 22 on the frame 21, preventing the frame 21 from loosening or being damaged due to long-term vibration, and ensuring the overall stability of the equipment. On the other hand, the elastic restoring force of the spring will "amplify" the vibration amplitude of the material distribution bin 22 or make the vibration more uniform, so that the vibration can be transmitted more effectively to all areas of the material distribution bin 22, especially near the material transfer channel and the material distribution trough 231, ensuring that the steel balls in different positions can be subjected to vibration, and further reducing the dead angle of conveying.

[0032] Reference Figure 6 As shown: A rotating collar 241 is provided above the material distribution bin 22, and an annular slide rail is arranged around the top of the material distribution bin 22. An annular slider 243 that slides with the annular slide rail is provided at the bottom of the rotating collar 241. The end of the material distribution push plate 24 away from the rotating shaft 25 is fixedly connected to the inner side wall of the annular collar.

[0033] The top of the material distribution bin 22 is surrounded by an annular slide rail, and the bottom of the rotating collar 241 above it is provided with an annular slider 243. The annular slider 243 and the annular slide rail form a sliding engagement, so that the rotating collar 241 can rotate stably along the annular trajectory with the material distribution bin 22 as the reference, providing outer ring guide support for the movement of the material distribution push plate 24, and ensuring that the rotating collar 241 does not deviate or jam during rotation.

[0034] Reference Figure 6 As shown: The height of the material distribution push plate 24 and the rotating collar 241 is greater than the height of the steel ball with the largest diameter.

[0035] Since the height of the material distribution push plate 24 and the rotating collar 241 is greater than the height of the steel ball with the largest diameter, this height is the vertical space to accommodate the steel ball, ensuring that the formed vertical space is sufficient to completely cover the height of the largest steel ball, and providing a vertical constraint boundary for the steel ball.

[0036] Reference Figure 7 As shown: The bottom of the material distribution tray 23 is provided with an inclined slide 2311 corresponding to each material distribution groove 231. The end of the inclined slide 2311 is provided with a partition 2312. The partition 2312 and the inclined slide 2311 cooperate to form a channel to guide the movement of steel balls of different diameters.

[0037] Each inclined slide 2311 at the bottom of the material distribution pallet 23 is provided with a partition 2312 at its end. The partition 2312 and the two side walls of the inclined slide 2311 together enclose a closed channel with a fixed cross section, which upgrades the inclined slide 2311 from an "open sliding path" to a "closed guide channel", ensuring that the steel ball can still be strictly constrained within the preset trajectory at the end of the channel. When the steel ball falls from the distribution trough 231 into the corresponding inclined slide 2311 and slides down along the inclined direction, it may deviate, bounce or spread to both sides at the end due to gravity and inertia. The partition 2312 restricts the steel ball's deviation space in the horizontal direction by physically blocking it, forcing the steel ball to move in a straight line along the channel formed by the slide and the partition 2312. This avoids the steel ball's trajectory deviation caused by speed differences or different surface smoothness, and ensures that the steel balls of the same diameter in each inclined slide 2311 maintain a uniform conveying direction. The end of the closed channel is precisely connected to the material distribution port 221 at the bottom of the material distribution bin 22 or the inlet of the annular vortex instrument 3; The closed channel formed by the partition 2312 and the slide rail maintains the high efficiency of the inclined slide rail 2311 in automatic gravity conveying, and enhances the conveying accuracy through trajectory constraints. This ensures that steel balls of different diameters can still enter the annular eddy current meter 3 in an orderly manner after sorting, reducing detection interruption or mixing problems caused by conveying deviation.

[0038] Reference Figure 7 As shown: The sealing tray has an arc 2313 at the top edge of each material distribution slot 231.

[0039] When the material distribution pusher 24 pushes the steel ball to the corresponding material distribution groove 231 position, the steel ball needs to slide from the surface of the material distribution support 23 into the material distribution groove 231. Since the top edge of the material distribution groove 231 has a curvature 2313, when the steel ball contacts the edge, the contact surface is a smooth curved surface rather than a sharp edge; For small-diameter steel balls, the curved edge 2313 can reduce the rigid collision between the ball and the groove, guiding the steel ball to slide naturally into the groove along the curved edge 2313, avoiding jamming caused by sharp corners. For large-diameter steel balls, the arc 2313 edge can disperse the contact stress between the steel ball and the groove, allowing the steel ball to pass over the groove edge more smoothly under the pushing force of the push plate and fall into the material distribution groove 231, reducing the "jamming" phenomenon caused by sharp edges.

[0040] Reference Figure 4 As shown: A cover plate 26 is horizontally provided above the material distribution bin 22. There is a gap between the cover plate 26 and the material distribution bin 22. An opening 261 is provided on the cover plate 26 to allow the feeding mechanism 1 to feed into the material distribution tray 23. A support seat 262 for connecting the cover plate 26 is provided on the frame 21.

[0041] The cover plate 26, which is horizontally set above the material distribution bin 22, is fixed by the support base 262 on the frame 21 and maintains a certain gap with the material distribution bin 22. The size of the gap is adapted to the vertical movement range of the material distribution bin 22 to avoid contact and interference between the two. The cover plate 26 covers the open area at the top of the material distribution bin 22, forming a closed constraint structure on the upper part of the material distribution mechanism 2. This effectively prevents the steel balls on the material distribution tray 23 from overflowing upwards into the material distribution bin 22 due to force, bouncing, or centrifugal force during the pushing process of the material distribution pusher 24. This prevents the equipment from getting stuck or the detection from being interrupted due to the falling steel balls. At the same time, it reduces the entry of external dust and impurities into the interior of the material distribution bin 22, protecting the cleanliness of core components such as the material distribution tray 23 and the material distribution pusher 24. The clearance opening 261 on the cover plate 26 precisely corresponds to the feeding area of ​​the feeding mechanism 1 and the material distribution tray 23. Its size and position design ensure that when the feeding mechanism 1 conveys steel balls, the steel balls can fall smoothly into the space formed by the "largest slot material distribution groove 231 and the smallest slot material distribution groove 231" on the material distribution tray 23 through the opening. This ensures that the feeding path is not blocked by the cover plate 26, and that the steel balls are constrained by other areas of the cover plate 26 after entering, preventing the steel balls from jumping out due to the instability of their initial position.

[0042] Reference Figure 3 and Figure 4 As shown: A servo motor 27 is located directly above the material distribution bin 22. The output shaft of the servo motor 27 passes through the cover plate 26 and is connected to one end of the rotating shaft 25. The servo motor 27 is connected to the support base 262 through the bracket.

[0043] The output shaft of the servo motor 27 passes through the cover plate 26. The cover plate 26 has a corresponding through hole to ensure that the output shaft does not contact the cover plate 26 when it passes through. It is directly connected to one end of the rotating shaft 25 at the center of the material distribution tray 23, so that the rotational power of the servo motor 27 can be directly transmitted to the rotating shaft 25, reducing power loss or transmission delay. This ensures that the speed and direction of the rotating shaft 25 are completely consistent with the output of the servo motor 27, providing stable power for the synchronous rotation of the material distribution push plate 24.

[0044] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An eddy current detection device for steel ball processing, comprising a feeding mechanism (1) and a distributing mechanism (2) disposed beside the feeding mechanism (1), characterized in that, The material distribution mechanism (2) includes a frame (21), a material distribution bin (22), a material distribution tray (23), and a material distribution pusher (24). The material distribution bin (22) is mounted on the frame (21) and can move up and down. The material distribution bin (22) is provided with a funnel-shaped material transfer channel. The top of the material distribution bin (22) is open and the bottom of the material distribution bin (22) is closed. The bottom of the material distribution bin (22) is provided with multiple material distribution ports (221) that are equidistantly distributed along the circumference of the material distribution bin (22). The material distribution ports (221) are connected to an annular eddy current meter (3). The material distribution tray (23) is horizontally set inside the material distribution bin (22). The material distribution tray (23) is disc-shaped. The material distribution tray (23) has a material distribution groove (231) that corresponds to each material distribution port (221). The size of the grooves of the multiple material distribution grooves (231) gradually increases clockwise. The number of material distribution push plates (24) is the same as the number of material distribution grooves (231) and they correspond one-to-one. The adjacent material distribution push plates (24) form a space for accommodating steel balls. The center of the material distribution tray (23) is provided with a rotating shaft (25) that can drive all the material distribution push plates (24) to rotate clockwise along the center of the material distribution tray (23). In the initial state of the material distribution tray (23), the material distribution push plates (24) can block the corresponding material distribution grooves (231). The feeding mechanism (1) is located above the space formed by the largest and smallest grooves of the material distribution grooves (231) among all the material distribution grooves (231).

2. The eddy current detection device for steel ball processing according to claim 1, characterized in that, A vibrator (222) is installed at the bottom of the material distribution bin (22). Extension plates (223) are distributed at equal intervals along the circumference of the material distribution bin (22). The frame (21) is equipped with the same number of buffer springs (224) as the extension plates (223). The output end of the buffer springs (224) is connected to the extension plates (223).

3. The eddy current detection device for steel ball processing according to claim 1, characterized in that, A rotating collar (241) is provided above the material distribution bin (22). A ring slide rail is provided around the top of the material distribution bin (22). A ring slider (243) is provided at the bottom of the rotating collar (241) and slides with the ring slide rail. The end of the material distribution push plate (24) away from the rotating shaft (25) is fixedly connected to the inner wall of the ring collar.

4. The eddy current detection device for steel ball processing according to claim 3, characterized in that, The height of the material distribution push plate (24) and the rotating collar (241) is greater than the height of the steel ball with the largest diameter.

5. The eddy current detection device for steel ball processing according to claim 1, characterized in that, The bottom of the material distribution tray (23) is provided with an inclined slide (2311) corresponding to each material distribution trough (231). The end of the inclined slide (2311) is provided with a partition (2312). The partition (2312) and the inclined slide (2311) cooperate to form a channel to guide the movement of steel balls of different diameters.

6. The eddy current detection device for steel ball processing according to claim 1, characterized in that, The sealing tray has an arc (2313) at the top edge of each material distribution slot (231).

7. The eddy current detection device for steel ball processing according to claim 1, characterized in that, A cover plate (26) is horizontally provided above the material distribution bin (22). There is a gap between the cover plate (26) and the material distribution bin (22). An avoidance opening (261) is provided on the cover plate (26) to avoid the feeding mechanism (1) feeding material onto the material distribution tray (23). A support base (262) for connecting the cover plate (26) is provided on the frame (21).

8. The eddy current detection device for steel ball processing according to claim 7, characterized in that, A servo motor (27) is located directly above the material distribution bin (22). The output shaft of the servo motor (27) passes through the cover plate (26) and is connected to one end of the rotating shaft (25). The servo motor (27) is connected to the support base (262) through the bracket.

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