Steel ball sorting and screening structure

Abstract

The utility model relates to a steel ball sorting and screening structure which comprises a roller which is driven by a first driving mechanism to rotate around the axis of the roller, the roller is further provided with a detection hole channel, and the detection hole channel of the roller at least has a feeding state, a detection state, a first discharging state and a second discharging state along with the change of the rotating position of the roller; the material rolling shaft is movably arranged in the mounting channel of the roller and can be in contact with the steel balls arranged in the through holes of the roller; the visual detection device is used for acquiring image information of the steel balls in the detection hole channels of the roller in the detection state; the first discharging frame is used for receiving qualified steel balls rolling out of the detection hole channel of the roller in the first discharging state; the second discharging frame is used for receiving the unqualified steel balls rolling out of the detection hole channel of the roller in the second discharging state; the ball blocking assembly comprises a ball blocking piece which can block the outer port of the detection hole channel and the outer port away from the detection hole channel. The device has the advantages of small and compact structure and small occupied space.

Description

Technical Field

[0001] This utility model relates to the field of steel ball processing technology, and in particular to a steel ball sorting and screening structure. Background Technology

[0002] Steel balls are smooth, mirror-reflective mechanical components commonly used as rolling elements in various bearings. The degree of defects in steel balls directly affects the bearing's precision, dynamic performance, and service life. Therefore, the surface quality of steel balls is a crucial indicator of bearing quality and requires rigorous testing.

[0003] For example, Chinese invention patent application CN202310090688.6 (publication number CN116124795A) discloses a fully automatic steel ball appearance inspection device. Along the direction of the steel ball's movement, it is sequentially equipped with a ball-entry area, a waiting-to-inspection area, an inspection area, and a sorting area. The ball-entry area has a feeding channel, the waiting-to-inspection area has a waiting-to-inspection channel, the inspection area has an inspection channel, and the sorting area has a dispensing channel. The feeding channel, waiting-to-inspection channel, inspection channel, and dispensing channel are sequentially connected. Corresponding to the inspection area, it also has an unfolding device for unfolding the steel balls in the inspection channel and a visual inspection device for acquiring image information of the steel balls unfolding during the inspection channel. The device, corresponding to the sorting area, also includes a sorting device for sorting and unloading qualified and unqualified steel balls entering the sorting channel. The sorting device includes baffles at the entrances of the first and second sorting channels. The baffles can be driven by a fifth drive mechanism to selectively open the entrances of the first and second sorting channels. The fifth drive mechanism and the vision inspection device are electrically connected to the controller of the fully automatic steel ball appearance inspection equipment. The controller can control the fifth drive mechanism to operate according to the steel ball detection information obtained from the vision inspection device, so that the corresponding steel balls that have completed the inspection enter the first or second sorting channel.

[0004] The steel ball testing equipment in the aforementioned patent application also has certain shortcomings. The appearance inspection and sorting of the steel ball testing equipment are carried out in two separate areas. That is, the inspection area is used to unfold and inspect the appearance through an unfolding device, and the sorting area is set up with a sorting device to sort the qualified and unqualified steel balls. This layout structure will result in the entire steel ball sorting equipment unfolding device being large in size and occupying a large space.

[0005] Therefore, the existing steel ball sorting and screening structure needs further improvement. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a steel ball sorting and screening structure that is small in size and occupies little space, in light of the current state of the technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a steel ball sorting and screening structure, comprising:

[0008] frame;

[0009] The roller extends horizontally and is rotatably mounted on the frame. It can be driven by the first drive mechanism to rotate around its own axis. The roller is axially hollow to form an installation channel. The roller is also provided with a detection channel that extends radially from the outside to the inside through the installation channel. The detection channel of the roller has at least a feeding state, a detection state, a first discharge state, and a second discharge state as the roller rotates. The opening orientation of the detection channel of the roller is different in the feeding state, detection state, first discharge state, and second discharge state.

[0010] The roller shaft is movably disposed in the mounting channel of the roller and can contact the steel ball inserted into the through hole of the roller, thereby driving the steel ball in the detection channel of the roller to rotate and unfold.

[0011] A visual inspection device is used to acquire image information of the steel ball inside the inspection channel of the roller during the inspection process;

[0012] The first discharge rack is used to receive qualified steel balls that roll out from the detection channel of the roller in the first discharge state;

[0013] The second discharge rack is used to receive defective steel balls that roll out of the detection channel of the roller in the second discharge state;

[0014] The ball-blocking assembly includes a ball-blocking member that can be moved between a ball-blocking position and a ball-releasing position by a fourth drive mechanism. When the ball-blocking member is in the ball-blocking position, the outer port of the detection channel of the roller in the first discharge state is blocked by the ball-blocking member. When the ball-blocking member is in the ball-releasing position, the ball-blocking member is away from the outer port of the detection channel of the roller in the first discharge state, allowing the steel ball in the detection channel of the roller to roll out.

[0015] To facilitate timely sorting of qualified and unqualified steel balls after visual inspection, the first and second discharge racks are arranged sequentially from top to bottom. The roller's inspection channel has an inner port connected to the installation channel and an outer port away from the installation channel. In both the first and second discharge states, the roller's inspection channel gradually slopes downwards from its inner port to its outer port. Specifically, the second angle formed between the extension direction of the roller's inspection channel in the second discharge state and the horizontal direction is greater than the first angle formed between the extension direction of the roller's inspection channel in the first discharge state and the horizontal direction. After visual inspection of the steel balls, the rotation of the roller allows for timely sorting of qualified and unqualified steel balls in situ (i.e., within the inspection area), further reducing the size of the steel ball visual inspection equipment and saving space. In particular, the first and second discharge racks are arranged in upper and lower layers, adapting to inspection channels at different inclination angles and further utilizing vertical space, reducing the floor space required.

[0016] To avoid interference between the roller and the corresponding first and second discharge racks during the rotation of the roller, the first included angle is denoted as α, and the value of α is in the range of 0° < α < 15°. The second included angle is denoted as β, and the value of β is in the range of 90° < β < 105°.

[0017] As an improvement, the fourth drive mechanism includes a first pneumatic push rod, and the ball stop is connected to the end of the telescopic rod of the first pneumatic push rod. It is conceivable that the fourth drive mechanism could also employ other linear drive mechanisms such as an electric push rod.

[0018] To enable the automatic discharge of qualified and unqualified steel balls at different positions, a controller is also included. The first drive mechanism, the fourth drive mechanism, and the vision inspection device are all electrically connected to the controller. The controller can control the first drive mechanism and the fourth drive mechanism to operate according to the steel ball detection information obtained from the vision inspection device, so that the qualified and unqualified steel balls that have completed the inspection roll out of the detection channel when the roller rotates to the corresponding first discharge state position and second discharge state position, respectively.

[0019] Generally, one detection channel can be set on the roller, so that the next steel ball is fed after each steel ball has completed the feeding, detection and unloading process. However, this method has relatively low detection efficiency. In order to effectively improve the detection efficiency of steel balls, four detection channels are arranged at intervals along the circumference of the roller. Each detection channel passes through the feeding state, detection state, first discharge state and second discharge state in sequence as the roller rotates.

[0020] To further improve the efficiency of steel ball appearance inspection, four inspection channels arranged at intervals along the circumference of the roller are referred to as an inspection hole group. The inspection hole group has at least two channels arranged sequentially along the axial direction of the roller, and the two inspection channels opposite each other in any two adjacent inspection hole groups have the same extension direction in the axial direction of the roller. The ball blocking assembly has at least two channels corresponding to the number of the above-mentioned inspection hole groups.

[0021] In order to enable the steel ball to automatically roll forward and be discharged under its own gravity, both the first discharge rack and the second discharge rack are gradually tilted downward from the end closer to the roller to the end farther away from the roller.

[0022] As an improvement, a cleaning tank is also provided at the end of the second discharge rack to receive steel balls that fail the inspection.

[0023] To ensure the steel balls are fully expanded in the inspection channels of the roller and guarantee the accuracy of appearance inspection, a second drive mechanism is included to drive the roller shaft to rotate around its own axis, and a third drive mechanism is included to drive the roller shaft to reciprocate along its own axis.

[0024] Compared with existing technologies, the advantages of this invention are as follows: the steel ball unfolding and inspection process, as well as the sorting process of qualified and unqualified steel balls, are all carried out in the inspection area. Specifically, after the steel balls are loaded into the inspection channel of the roller, they can contact the rolling shaft loaded into the roller. The rolling shaft rotates while also reciprocating axially, thereby causing the steel balls to rotate and fully unfold. After the steel ball appearance inspection is completed, the rotation of the roller and the cooperation of the ball-blocking assembly allow for timely sorting of qualified and unqualified steel balls in situ (i.e., within the inspection area). This "roller-type" steel ball unfolding structure is small in size, saving space. In particular, the layout design for in-situ steel ball inspection and sorting further reduces the size of the steel ball appearance inspection equipment, saving space. Furthermore, the inspection channels of the roller can be in different positions as the roller rotates, facilitating the loading, inspection, and unloading of steel balls, effectively improving the efficiency of steel ball appearance inspection. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the fully automatic steel ball sorting equipment according to an embodiment of the present utility model;

[0026] Figure 2 This is a three-dimensional structural diagram of the fully automatic steel ball sorting equipment according to another embodiment of the present utility model;

[0027] Figure 3 This is a three-dimensional structural diagram of the fully automatic steel ball sorting equipment according to an embodiment of the present utility model, excluding components such as the outer cover;

[0028] Figure 4 This is a right view of the fully automatic steel ball sorting equipment according to an embodiment of the present invention, omitting the counting and packaging unit;

[0029] Figure 5 This is a vertical sectional view (cut along the conveying direction of the steel balls) of the fully automatic steel ball sorting equipment according to an embodiment of the present invention after omitting the counting and packaging unit;

[0030] Figure 6 This is a three-dimensional structural diagram of the cleaning and feeding device according to an embodiment of the present utility model;

[0031] Figure 7 This is a vertical sectional view (cut along the conveying direction of the steel balls) of the cleaning and feeding device according to an embodiment of the present utility model.

[0032] Figure 8 This is a three-dimensional structural diagram of the sorting and screening device according to an embodiment of the present utility model;

[0033] Figure 9 This is a vertical sectional view of the sorting and screening device according to an embodiment of the present invention, cut along the conveying direction of the steel balls (the lifting platform is in the first position);

[0034] Figure 10 This is a vertical sectional view of the sorting and screening device according to an embodiment of the present invention, cut along the conveying direction of the steel balls (the lifting platform is in the second position, and the qualified steel balls roll out from the detection channel and enter the first discharge rack).

[0035] Figure 11 This is a vertical sectional view of the sorting and screening device according to an embodiment of the present invention, cut along the conveying direction of the steel balls (the lifting platform is in the second position, and the steel balls that fail the inspection roll out from the inspection channel and enter the second discharge rack).

[0036] Figure 12 This is a three-dimensional structural diagram of the appearance inspection unit according to an embodiment of the present utility model;

[0037] Figure 13 This is a three-dimensional structural diagram of the appearance inspection unit from another angle according to an embodiment of the present utility model;

[0038] Figure 14 This is a three-dimensional structural diagram of the steel ball feeding mechanism according to an embodiment of the present utility model;

[0039] Figure 15 This is a vertical sectional view of the appearance inspection unit of this utility model, cut along the axial direction of the roller.

[0040] Figure 16 This is a front view of the appearance inspection unit according to an embodiment of the present utility model;

[0041] Figure 17This is a three-dimensional structural diagram of the counting and packaging device according to an embodiment of the present utility model;

[0042] Figure 18 This is a three-dimensional structural diagram of the turntable assembly according to an embodiment of the present utility model. Detailed Implementation

[0043] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0044] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0045] Figures 1-18 A preferred embodiment of the fully automatic steel ball sorting equipment of this utility model is shown. The fully automatic steel ball sorting equipment includes a cleaning and feeding device, a sorting and screening device, and a counting and packaging device. The sorting and screening device includes a steel ball feeding mechanism 42, an appearance inspection unit, and a discharge rack. Specifically, a ball storage and inspection area, an inspection area, and a sorting and packaging area are arranged sequentially along the forward direction of the steel balls.

[0046] See also Figures 1-3 The cleaning and feeding device is located in the aforementioned ball storage and inspection area. The sorting and screening device is located in the inspection area to inspect the appearance of the steel balls and sort the qualified and unqualified steel balls after inspection. The counting and packaging device is located in the aforementioned sorting and packaging area and is a counting and packaging unit used to count and package the qualified steel balls.

[0047] See also Figures 5-7The cleaning and feeding device includes a ball storage hopper 20, a cleaning chamber 30, and a spray arm 33 mounted on the cleaning chamber 30. The ball storage hopper 20 holds the steel balls to be tested, and its bottom wall is inclined. The side of the ball storage hopper 20 has a discharge port 21 for the steel balls to roll out, and the discharge port 21 corresponds to the lowest point of the bottom wall of the ball storage hopper 20. The cleaning chamber 30 has a first opening 31 on one side wall adjacent to the ball storage hopper 20 that connects to the discharge port 21, and a second opening 32 on one side wall away from the ball storage hopper 20 for the steel balls inside the cleaning chamber 30 to roll out. The bottom wall of the cleaning chamber 30 is also inclined, so that the steel balls can roll from the first opening 31 to the second opening 32 under their own weight. The second opening 32 is a strip-shaped opening extending along the width direction of the cleaning tank 30, wherein the width direction of the cleaning tank 30 is perpendicular to the rolling or forward direction of the steel ball within the cleaning tank 30. The spray assembly includes a spray arm 33, which is positioned above the cleaning tank 30 and has spray holes 331. The spray arm 33 is elongated and also extends along the width direction of the cleaning tank 30. The spray arm 33 has a water storage chamber 330 with a top opening, and each spray hole 331 is formed on the bottom wall of the water storage chamber 330. A water supply connector 332 for connecting to an external water pipe is also provided at the top opening of the water storage chamber 330.

[0048] The first opening 31 of the cleaning chamber 30 has a baffle plate 22 extending upward from the bottom wall of the cleaning chamber 30. After the baffle plate 22 is set at the first opening 31, the steel balls in the ball storage hopper 20 can roll into the cleaning chamber 30 from top to bottom, avoiding the cleaning effect being affected by the excessive number of steel balls in the cleaning chamber 30.

[0049] In this embodiment, the cleaning and feeding device has a cleaning box 30 on one side of the ball storage hopper 20. The cleaning box 30 is equipped with a spray assembly. This allows for timely cleaning of the steel balls after they roll out of the ball storage hopper 20. After cleaning, the steel balls are sent downstream for visual inspection. This effectively reduces false detections caused by surface contamination of the steel balls and improves the efficiency of steel ball sorting.

[0050] See also Figure 6 The ball storage and inspection area is also equipped with a feeding rack 40. One end of the feeding rack 40 is connected to the second opening 32 of the cleaning chamber 30 to receive the cleaned steel balls that have rolled out of the cleaning chamber 30. The other end extends to the inspection area and is connected to the steel ball feeding mechanism 42 in the inspection area. The feeding rack 40 is provided with inspection channels 41 that are aligned with the extension direction of the feeding rack 40. There are at least two inspection channels 41 arranged side by side in a transverse direction, such as... Figure 6Eight inspection channels 41 are shown. Each inspection channel 41 is gradually inclined downward along the forward direction of the steel ball, so that the steel ball that moves into the inspection channel 41 can also move forward under its own gravity to the position of the steel ball feeding mechanism 42.

[0051] See also Figures 8-16 The appearance inspection unit of the sorting and screening device includes a unfolding device 5, a vision inspection device 7, and a discharge rack. The steel ball feeding mechanism 42 is located on the side of the unfolding device 5 facing the feeding rack 40, and the discharge rack is located on the side away from the feeding rack. The unfolding device 5 includes a roller 51, a rolling shaft 52, a first drive mechanism 61, a second drive mechanism 62, and a third drive mechanism 63. The sorting and screening device is also surrounded by an outer cover 55 for protection, such as... Figure 1 and Figure 2 As shown.

[0052] The top of the frame 10 has two vertical plates 11 arranged opposite each other, and the roller 51 extends horizontally and is rotatably mounted on the two vertical plates 11. Figure 16 As shown, both ends of the roller 51 are rotatably supported in corresponding shaft holes on two vertical plates 11 via bearings 514. The first drive mechanism 61 includes a first motor mounted on the frame 10. One end of the roller 51 passes through the shaft hole of the vertical plate 11 and is connected to the output shaft of the first motor. The roller 51 can rotate around its own axis under the drive of the first motor. The roller 51 has an axially hollow mounting channel 511. At the end of the roller 51 away from the first motor, there is a mounting opening 512 that communicates with the mounting channel 511. The roller shaft 52 can rotate from the mounting opening 512 into the mounting channel of the roller 51. The roller 51 is also provided with a detection channel 513 that extends radially from the outside to the inside into the mounting channel 511. The inner diameter of the detection channel 513 is slightly larger than the outer diameter of the steel ball to be inspected.

[0053] The roller shaft 52 is rotatably disposed in the mounting channel 511 of the roller 51, and the extending direction of the roller shaft 52 is consistent with the extending direction of the roller 51. The outer diameter of the main body of the roller shaft 52 is slightly larger than the inner diameter of the mounting hole of the roller 51, so that the roller shaft 52 can rotate freely in the mounting hole of the roller 51. During the rotation of the roller shaft 52, it can contact the steel ball inserted into the detection hole 513 of the roller 51, thereby driving the steel ball to rotate within the detection hole 513. The two ends of the roller shaft 52 respectively have a first rotating shaft 521 and a second rotating shaft 522 extending outward along the axial direction. The first rotating shaft 521 is rotatably connected to the end of the roller 51 away from the mounting opening 512, and the second rotating shaft 522 extends out of the mounting opening 512 of the roller 51 and is rotatably connected to the corresponding upright plate 11. Figure 16As shown, a first bushing 523 is provided at the end of the roller 51 away from the mounting opening 512. The first rotating shaft 521 of the roller 52 is rotatably disposed in the first bushing 523 and can slide axially within the first bushing 523. A second bushing 524 is provided on the vertical plate 11 opposite to the mounting opening 512 of the roller 51. The second rotating shaft 522 of the roller 52 is rotatably disposed in the second bushing 524 and can slide axially within the second bushing 524. The second rotating shaft 522 of the roller 52 passes through the vertical plate 11 and extends outward a certain distance. The second drive mechanism 62 includes a second motor, the output shaft of which is connected to the second rotating shaft 522 of the roller 52, thereby driving the roller 52 to rotate. To enable axial reciprocating movement while the roller shaft 52 rotates, a slide 12 capable of linear movement relative to the frame 10 is provided on the frame 10. Specifically, the bottom of the slide 12 is connected to the frame 10 via a slide rail assembly 13, and the sliding direction of the slide 12 relative to the frame 10 is parallel to the axial direction of the roller 51. A second motor is mounted on the slide 12 and moves with it. The third drive mechanism 63 includes a third motor fixed to the frame 10. The third motor is connected to the slide 12 via a transmission mechanism, thereby driving the slide 12 to slide. Generally, the transmission mechanism can employ various transmission structures that can cooperate with the drive motor to achieve linear reciprocating movement, such as a connecting rod 142 mechanism, a crank-slider motion mechanism, etc. In a preferred embodiment, the transmission mechanism includes a cam 141 mounted on the output shaft of the third motor and a connecting rod 142 connected to the cam 141. The first end of the connecting rod 142 is rotatably connected to the cam 141 at a position away from its rotation center, and the second end is rotatably connected to the slide 12. When the third motor is activated, the slide block 12 is driven to reciprocate along the slide rail assembly 13 through the cooperation of the cam 141 and the connecting rod 142.

[0054] During the rotation of the roller shaft 52 driven by the second motor, the third motor also operates simultaneously, driving the slide 12 and the roller shaft 52 to move linearly back and forth along the axial direction. In this way, the roller shaft 52 can drive the steel ball in the detection channel 513 located in the roller 51 to fully unfold, so that the vision inspection device 7 can inspect the appearance of the steel ball in the detection channel 513.

[0055] See also Figures 9-11The detection channel 513 of the roller 51 has at least three states: feeding, detection, and discharging, depending on the rotation position of the roller 51. The opening orientation of the detection channel 513 differs depending on these states. In the feeding state, the opening of the detection channel 513 faces the inspection channel 41; in the detection state, it faces the visual inspection device 7; and in the discharging state, it faces the discharge rack. To facilitate timely sorting of qualified and unqualified steel balls after visual inspection, the detection channel 513 of the roller 51 has a first discharging state and a second discharging state. The opening direction of the detection channel 513 in the first discharging state differs from that in the second discharging state, allowing qualified and unqualified steel balls to roll out of the detection channel 513 respectively. The detection channel 513 of the roller 51 has an inner port 5132 connected to the mounting channel 511 and an outer port 5131 away from the mounting channel 511. In the feeding state, the detection channel 513 of the roller 51 gradually slopes downward from its outer port 5131 to its inner port 5132. In this way, the steel ball, when placed at the outer port 5131 of the detection channel 513, can automatically roll to the inner port 5132 under its own gravity without easily falling out of the detection channel 513. In the detection state, the opening direction of the detection channel 513 of the roller 51 is upward, opposite to the vision inspection device 7 located above the frame 10. This device is used to acquire image information of the steel ball unfolding in the detection channel 513, and analyze the acquired image information of the steel ball to determine whether there are defects in the appearance of the steel ball. The visual inspection device 7 can employ various existing inspection devices capable of achieving the above-mentioned functions. It generally includes a visual sensor, a camera, and an image processing system. The visual sensor captures subtle changes in the reflected light from the surface of the sphere and transmits this information to the image processing system. For example, Chinese invention patent application CN201610457209.X (publication number CN105911064A) discloses such a visual inspection device 7. In the discharge state, the detection channel 513 of the roller 51 gradually slopes downwards from its inner port 5132 to its outer port 5131, thereby facilitating the automatic outward rolling of the steel balls in the detection channel 513. The discharge rack includes a first discharge rack 541 and a second discharge rack 542. The first discharge rack 541 is used to receive the steel balls rolling out of the detection channel 513 of the roller 51 in the first discharge state, and the second discharge rack 542 is used to receive the steel balls rolling out of the detection channel 513 of the roller 51 in the second discharge state.The first discharge rack 541 and the second discharge rack 542 are arranged sequentially from top to bottom. The detection channel 513 of the roller 51 in both the first and second discharge states gradually extends downward from its inner port 5132 to its outer port 5131. The angle formed between the extension direction of the detection channel 513 of the roller 51 in the second discharge state and the horizontal direction is called the second angle, and the angle formed between the extension direction of the detection channel 513 of the roller 51 in the first discharge state and the horizontal direction is called the first angle. In order to avoid interference between the roller 51 and the corresponding first discharge rack 541 and second discharge rack 542 during the rotation of the roller 51, the second angle is greater than the first angle. Specifically, the first angle is denoted as α, and the value of α is in the range of 0° < α < 15°. The second angle is denoted as β, and the value of β is in the range of 90° < β < 105°.

[0056] Combination Figure 10 and Figure 11 The ball-blocking assembly 53 includes a ball-blocking member 531 that can be moved between a ball-blocking position and a ball-releasing position by being driven by a fourth drive mechanism 532. When the ball-blocking member 531 is in the ball-blocking position, the outer port 5131 of the detection channel 513 of the roller 51 in the first discharge state is blocked by the ball-blocking member 531. When the ball-blocking member 531 is in the ball-releasing position, it moves away from the outer port 5131 of the detection channel 513 of the roller 51 in the first discharge state, allowing the steel ball in the detection channel 513 of the roller 51 to roll out. The fourth drive mechanism 532 includes a first pneumatic push rod, and the ball-blocking member 531 is connected to the end of the telescopic rod of the first pneumatic push rod. When the first pneumatic push rod extends or retracts, the ball-blocking member 531 can extend to the outer port 5131 of the detection channel 513 of the roller 51 in the first discharge state and retract away from the outer port 5131 of the detection channel 513. The ball-blocking component 531 can be a rod or a plate structure. The steel ball sorting device also includes a controller, wherein the first drive mechanism 61, the fourth drive mechanism 532, and the vision inspection device 7 are all electrically connected to the controller. The controller can control the first drive mechanism 61 and the fourth drive mechanism 532 to operate according to the steel ball detection information obtained from the vision inspection device 7, so that the qualified and unqualified steel balls that have completed the inspection roll out from the detection channel 513 when the roller 51 rotates to the corresponding first discharge state position and second discharge state position, respectively. Specifically, when the vision inspection device 7 detects that the steel ball in the corresponding detection channel 513 has no defects in appearance, it is determined that the steel ball is qualified. After the roller 51 rotates further under the drive of the first drive mechanism 61, the detection channel 513 where the qualified steel ball is placed is in the first discharge state. At the same time, the ball-blocking component 531 of the ball-blocking assembly 53 opens the outer port 5131 of the detection channel 513, and the steel ball can automatically roll out and fall onto the first discharge rack 541. Figure 10As shown. When the visual inspection device 7 detects a defect in the appearance of the steel ball in the corresponding inspection channel 513, it determines that the steel ball is unqualified. After the roller 51 rotates further under the drive of the first drive mechanism 61, the inspection channel 513 where the unqualified steel ball is placed is in the first discharge state, but the ball-blocking component 531 of the ball-blocking assembly 53 is in the ball-blocking position, that is, the outer port 5131 of the inspection channel 513 is blocked, and the steel ball will not roll out. When the roller 51 rotates further, the inspection channel 513 where the unqualified steel ball is placed is in the second discharge state. At this time, the outer port 5131 of the inspection channel 513 is away from the ball-blocking component 531, and the steel ball can automatically roll out and fall onto the second discharge rack 542. Figure 9 and Figure 11 As shown.

[0057] After the steel ball appearance inspection is completed, the rotation of roller 51 allows for timely sorting of qualified and unqualified steel balls in situ (i.e., within the inspection area). This further reduces the size of the steel ball appearance inspection equipment, saving space. In particular, the first discharge rack 541 and the second discharge rack 542 are arranged in upper and lower layers, which can be adapted to the inspection channels 513 at different inclination angles, further utilizing the vertical space and reducing the floor area.

[0058] Generally, one detection channel 513 can be provided on the roller 51, so that the next steel ball is fed after each steel ball has completed the feeding, detection, and unloading process. However, this method has relatively low detection efficiency. In order to effectively improve the detection efficiency of the steel balls, in a preferred embodiment, four detection channels 513 are arranged at intervals along the circumference of the roller 51. Each detection channel 513 passes through the feeding state, detection state, first discharge state, and second discharge state in sequence as the roller 51 rotates. Furthermore, the four detection channels 513 arranged at intervals along the circumference of the roller 51 are called a detection hole group. The detection hole group has at least two channels arranged sequentially along the axial direction of the roller 51, and the two detection channels 513 opposite each other in the axial direction of any two adjacent detection hole groups have the same extension direction. The ball-blocking assembly 53 has at least two corresponding to the number of the above detection hole groups. Figure 16 As shown, there are eight sets of detection holes corresponding to the eight channels 41 to be inspected, and there are also eight sets of ball-blocking components 53.

[0059] In this embodiment, both the first discharge rack 541 and the second discharge rack 542 gradually tilt downwards from the end closest to the roller 51 to the end furthest from the roller 51. In this way, after the steel ball falls from the detection channel 513 of the roller 51 onto the corresponding discharge rack, it can continue to roll forward under its own gravity.

[0060] See also Figure 2The steel ball sorting equipment in this embodiment also includes a return rack 18 and a cleaning tank 17. The first end of the return rack 18 is connected to the second discharge rack 542 to receive defective steel balls from the second discharge rack 542, and the second end extends to the location of the cleaning tank 17. The return rack 18 is also inclined, allowing the steel balls to roll down into the cleaning tank 17 under their own weight. After being cleaned in the cleaning tank 17, the defective steel balls can be returned to the ball storage hopper 20 for a new round of inspection and sorting.

[0061] See also Figures 12-14 The steel ball feeding mechanism 42 is located at the end of the inspection channel 41, between the roller 51 of the unfolding device 5 and the feeding frame 40. Specifically, it can be installed as a modular component on two opposing upright plates 11 on the frame 10. The steel ball feeding mechanism 42 is used to separate the steel balls a coming from the inspection channel 41 and transfer them to the inspection channel 513 of the roller 51 in the feeding state. The steel ball feeding mechanism 42 includes a fixed platform 421, a lifting platform 422, and a lifting drive mechanism 423. The lifting drive mechanism 423 includes a lifting cylinder, which is fixed on a second bracket 162. The second bracket 162 is a horizontal frame, which is provided on the two upright plates 11. The fixed platform 421 is connected to the lower part of the horizontal frame by two vertically extending connecting rods. The lifting platform 422 is also located below the horizontal frame, between the fixed platform 421 and the end of the inspection channel 41, and is connected to the end of the telescopic rod of the lifting cylinder. The top of the lifting platform 422 has upward-extending guide rods on both the left and right sides, and the crossbar is equipped with guide sleeves that are compatible with the guide rods. The top of the fixed platform 421 is provided with a first rolling groove 4211, which gradually slopes downward along the forward direction of the steel ball. When the detection channel 513 of the roller 51 is in the loading state, the end port of the first rolling groove 4211 is connected to the outer port 5131 of the detection channel 513. In this way, the steel ball that moves into the first rolling groove 4211 of the fixed platform 421 can automatically roll into the detection channel 513 of the roller 51.

[0062] The lifting platform 422 can move between a first position and a second position under the action of the lifting cylinder. A second rolling groove 4221 is provided at the top of the lifting platform 422, which gradually slopes downwards along the forward direction of the steel ball. When the lifting platform 422 is in the first position, the second rolling groove 4221 of the lifting platform 422 is lower than the first rolling groove 4211 of the fixed platform 421, and is connected to or lower than the end port of the inspection channel 41, so that the steel ball in the inspection channel 41 can roll and remain in the second rolling groove 4221 of the lifting platform 422. The extension dimension of the second rolling groove 4221 of the lifting platform 422 is greater than the outer diameter of one steel ball to be inspected, but less than the sum of the outer diameters of two steel balls to be inspected, thus allowing only one steel ball to enter the second rolling groove 4221 of the lifting platform 422. When the lifting platform 422 is in the second position mentioned above, the lifting platform 422 moves upward until the second rolling groove 4221 of the lifting platform 422 is higher than or connected to the first rolling groove 4211 of the fixed platform 421, so that the steel balls remaining in the second rolling groove 4221 can roll into the first rolling groove 4211 of the fixed platform 421. At the same time, the second rolling groove 4221 of the lifting platform 422 is also higher than the end position of the inspection channel 41 of the feeding rack 40, so as to prevent subsequent steel balls in the inspection channel 41 from entering the second rolling groove 4221.

[0063] See also Figure 17 and Figure 18 After being sorted by the steel ball sorting and screening structure, the qualified steel balls are moved forward through the first discharge rack 541 to the counting and packaging device in the counting and packaging area for automatic counting and packaging. The steel ball sorting equipment includes a conveyor rack, a first sensor 831, a second sensor 832, a first baffle assembly 85a, a second baffle assembly 85b, and a turntable assembly 8.

[0064] The turntable assembly 8 includes a rotating disk 81, a turntable drive mechanism 82 for driving the rotating disk 81 to rotate, and collection boxes 811 arranged sequentially along the circumference of the rotating disk 81. The rotating disk 81 is horizontally positioned and rotatably mounted on the worktable 15 along a vertically extending shaft. The turntable drive mechanism 82 includes a turntable drive motor located at the bottom of the worktable 15. The output shaft of the turntable drive motor extends upward and is connected to the center of the rotating disk 81 for transmission, driving the rotating disk 81 to rotate. Each collection box 811 on the rotating disk 81 is a fan-shaped box or trapezoidal box with a large outer end and a small inner end, thereby making full use of the space at the top of the turntable to place the collection boxes 811. When collecting steel balls, an open packaging bag can be placed in the collection box 811 to receive the steel balls. After counting and packaging are completed, a new packaging bag can be replaced to receive the steel balls.

[0065] One end of the conveyor frame is connected to the first discharge frame 541 to receive the tested steel balls, and the other end extends to the location of the rotating disk 81 to convey the steel balls to the collection box 811. In this embodiment, the conveyor frame includes a first conveyor frame 841 and a second conveyor frame 842 connected sequentially along the conveying direction of the steel balls, with a height difference at the connection point. Both the first conveyor frame 841 and the second conveyor frame 842 gradually tilt downwards along the forward direction of the steel balls, allowing the steel balls to be automatically conveyed forward under their own weight. The height of the inlet end of the second conveyor frame 842 is lower than the height of the end of the first conveyor frame 841, and the second conveyor frame 842 is equipped with an oil spraying assembly 843 for spraying rust-preventive oil onto the passing steel balls. The oil spraying assembly 843 can be located at the inlet end of the second conveyor frame 842.

[0066] Considering that steel balls of other sizes, especially small ones, may be mixed in the ball storage hopper 20, a ball drop opening 8410 is provided at the bottom of the first conveyor frame 841 in order to automatically separate the small steel balls. The ball drop opening 8410 is a strip-shaped opening extending along the conveyor frame. The width of the ball drop opening 8410 is smaller than the outer diameter of the steel ball to be inspected, but larger than the outer diameter of other small steel balls. In this way, steel balls smaller than the set diameter can be automatically separated during the steel ball conveying process.

[0067] The second conveyor frame 842 is equipped with a first sensor 831 for detecting the number of steel balls passing through and a second sensor 832 for detecting whether there are steel balls at the current position on the second conveyor frame 842. The first sensor 831 is located in front of the second sensor 832 along the forward direction of the steel balls on the second conveyor frame 842. Both the first sensor 831 and the second sensor 832 can be infrared sensors. The first sensor 831 and the turntable drive mechanism 82 are electrically connected to a controller. The controller controls the start and stop of the turntable drive mechanism 82 based on whether the number of steel balls transmitted by the first sensor 831 meets the packaging requirements. For example, when the first sensor 831 detects that the number of transmitted steel balls has reached a set number, the turntable drive mechanism 82 starts, rotating the rotating disk 81 by a set angle and then stopping, causing the adjacent empty collection box 811 on the rotating disk 81 to move to a position corresponding to the end of the second conveyor frame 842. Then, the first sensor 831 starts counting again.

[0068] Furthermore, considering that the rotation of the rotating disk 81 to switch the position of the collection box 811 takes a certain amount of time, after the set number of steel balls has been counted, it is necessary to block other steel balls coming from upstream. Therefore, a first blocking component 85a and a second blocking component 85b are also included on the conveyor frame. Specifically, both the first blocking component 85a and the second blocking component 85b are located on the second conveyor frame 842. Along the forward direction of the steel balls on the second conveyor frame 842, the first blocking component 85a is located in front of the second blocking component 85b, the first sensor 831 is located in front of the first blocking component 85a, and the second sensor 832 is located behind the second blocking component 85b. The distance between the first blocking component 85a and the second blocking component 85b is selected according to the specifications and dimensions of the steel balls. That is, through the coordination of the blocking and releasing actions of the first blocking component 85a and the second blocking component 85b, the area on the second conveyor frame 842 between the first blocking component 85a and the second blocking component 85b can retain a set number of steel balls. The first and second blocking assemblies 85a and 85b have identical structures, each including a blocking rod 851 and a blocking drive mechanism 852. The side of the second conveyor frame 842 has an upwardly extending third support. The blocking drive mechanism 852 is a second pneumatic push rod mounted on the third support. The telescopic rod of the second pneumatic push rod can extend downwards and retract upwards. The blocking rod 851 is connected to the bottom of the telescopic rod of the second pneumatic push rod and is driven by the second pneumatic push rod to reciprocate between the blocking position where the steel ball is blocked from moving along the conveyor frame and the release position where the blockage is lifted. The blocking drive mechanism 852 and the second sensor 832 of both the first and second blocking assemblies 85a and 85b are electrically connected to a controller. The controller controls the starting and stopping of the blocking drive mechanism 852 of both assemblies based on the signal from the second sensor 832 indicating whether there is a steel ball at the current position.The specific operation process is as follows: Initially, the baffle rod 851 of the first baffle assembly 85a moves down to block the balls, and the baffle rod 851 of the second baffle assembly 85b moves up to release the balls. The steel balls will then be arranged sequentially from the position of the baffle rod 851 of the first baffle assembly 85a backwards. When the balls reach the sensing area of ​​the second sensor 832, the second sensor 832 recognizes this. At this time, the section between the first baffle assembly 85a and the second baffle assembly 85b is also full of balls, and contains a set number of steel balls (the number of steel balls is a common divisor of the number of balls in a collection box; for example, if a box contains 300 steel balls, the number of balls in the two baffle assemblies is 25). Then, the stop bar 851 of the first stop assembly 85a moves upward to release the balls, and the stop bar 851 of the second stop assembly 85b moves downward to block the balls. Simultaneously, a timer starts. After a set time (ensuring all steel balls between the two stop assemblies have rolled out), the stop bar of the first stop assembly 85a moves downward again to block the balls, and the stop bar of the second stop assembly 85b moves upward again to release the balls. This process repeats until the required number of steel balls for one collection box 811 is reached. Then, the controller controls the turntable drive mechanism 82 to rotate the turntable 81 one notch, moving the next adjacent collection box 811 to the set position, and the count is reset to zero. In some cases, due to abnormalities, if the quantity is insufficient (e.g., 24 balls), additional balls will be added, and the ball release will not occur while the turntable is rotating.

[0069] The working process of the fully automatic steel ball sorting equipment in this embodiment is as follows:

[0070] Steel balls awaiting sorting are placed in the ball storage hopper 20. Since the hopper 20 is inclined, they automatically enter the cleaning chamber 30. The spray system on the cleaning chamber 30 cleans the steel balls, and after cleaning, the balls automatically roll out and move to the feeding rack 40 connected to the cleaning chamber 30. The feeding rack 40 has multiple parallel inspection channels 41 that simultaneously convey the steel balls. The feeding rack 40 is also inclined, and the steel balls in the inspection channels 41 automatically roll forward to the steel ball loading mechanism 42. The steel ball loading mechanism 42 separates the steel balls at the very end of the inspection channels 41 and moves them to the detection channel 513 of the unfolding device 5. Specifically, the lifting platform 422 can move between a first position and a second position under the drive of the lifting cylinder. When the lifting platform 422 is in the first position, the second rolling trough 4221 of the lifting platform 422 is lower than the first rolling trough 4211 of the fixed platform 421, and is connected to or lower than the end port of the inspection channel 41. This allows the last steel ball in the inspection channel 41 to roll and remain in the second rolling trough 4221 of the lifting platform 422. When feeding is required, the lifting platform 422 moves to the second position. At this time, the second rolling trough 4221 of the lifting platform 422 is higher than or connected to the first rolling trough 4211 of the fixed platform 421. The steel ball remaining in the second rolling trough 4221 can automatically roll to the first rolling trough 4211 of the fixed platform 421. Simultaneously, the second rolling trough 4221 of the lifting platform 422 is also higher than the end position of the inspection channel 41 of the feeding rack 40, preventing subsequent steel balls in the inspection channel 41 from entering the second rolling trough 4221. The drum 51 of the unfolding device 5 has four circumferentially spaced detection channels 513. As the drum 51 rotates, the four detection channels 513 sequentially exhibit a feeding state, a detection state, a first discharge state, and a second discharge state. (See also...) Figures 9-11The opening orientation of the detection channel 513 of the roller 51 in the above-mentioned feeding state, detection state, first discharge state, and second discharge state is different. When one of the detection channels 513 is in the feeding state, the other detection channels 513 are in the detection state, first discharge state, and second discharge state respectively. When the roller 51 in the feeding state is in the feeding state, the opening of the detection channel 513 faces the inspection channel 41 (that is, the fixed platform 421 of the steel ball feeding mechanism 42), and the steel balls in the first rolling groove 4211 of the fixed platform 421 automatically roll into the detection channel 513. When the roller 51 in the detection state is in the detection state, the opening of the detection channel 513 faces upward, that is, towards the upward visual inspection device 7. When the roller 51 in the first discharge state is in the first discharge state, the opening of the detection channel 513 faces the first discharge rack 541, and the qualified steel balls in the detection channel 513 automatically roll out and fall onto the first discharge rack 541. When the roller 51 is in the second discharge state, the opening of the detection channel 513 faces the second discharge rack 542, and the defective steel balls in the detection channel 513 automatically roll out and fall onto the second discharge rack 542.

[0071] When the steel ball that has entered the detection channel 513 rotates with the drum 51 to the detection state, the second motor drives the roller shaft 52 to rotate, and the third motor also operates at the same time, driving the slide 12 and the roller shaft 52 to move linearly back and forth along the axial direction. In this way, the roller shaft 52 can drive the steel ball in the detection channel 513 of the drum 51 to fully unfold, so that the vision inspection device 7 can inspect the appearance of the steel ball in the detection channel 513.

[0072] When the visual inspection device 7 detects that the steel ball in the corresponding inspection channel 513 has no defects, it is determined that the steel ball is qualified. After the roller 51 rotates further under the drive of the first drive mechanism 61, the inspection channel 513 where the qualified steel ball is placed is in the first discharge state. At the same time, the ball-blocking component 531 of the ball-blocking assembly 53 opens the outer port 5131 of the inspection channel 513, and the steel ball can automatically roll out and fall onto the first discharge rack 541. Figure 10 As shown. When the visual inspection device 7 detects a defect in the appearance of the steel ball in the corresponding inspection channel 513, it determines that the steel ball is unqualified. After the roller 51 rotates further under the drive of the first drive mechanism 61, the inspection channel 513 where the unqualified steel ball is placed is in the first discharge state, but the ball blocking component 531 of the ball blocking assembly 53 is in the ball blocking position, that is, the outer port 5131 of the inspection channel 513 is blocked, and the steel ball will not roll out. When the roller 51 rotates further, the inspection channel 513 where the unqualified steel ball is placed is in the second discharge state. At this time, the outer port 5131 of the inspection channel 513 is away from the ball blocking component 531, and the steel ball can automatically roll out and fall onto the second discharge rack 542.

[0073] After failing the inspection, the steel balls fall onto the second discharge rack 542 and roll along the second discharge rack 542 to the return rack 18. The return rack 18 then sends them to the corresponding cleaning tank 17. After being cleaned in the cleaning tank 17, they can be put back into the ball storage hopper 20 for a new round of inspection and sorting.

[0074] After passing inspection, the steel balls fall onto the first discharge rack 541 and roll along it to the counting and packaging area for automatic counting and packaging by the counting and packaging unit. The first conveyor rack 841 of the counting and packaging unit is connected to the first discharge rack 541. During the conveying process of the steel balls along the first conveyor rack 841, steel balls smaller than a set diameter fall at the ball drop outlet 8410, achieving automatic separation. The second conveyor rack 842 of the counting and packaging unit is connected to the first conveyor rack 841 and is equipped with an oil spraying assembly 843 for spraying rust-preventive oil onto the passing steel balls. The second conveyor rack 842 is equipped with a first sensor 831, a second sensor 832, a first baffle assembly 85a, and a second baffle assembly 85b. Initially, the baffle rod 851 of the first baffle assembly 85a moves down to block the balls, while the baffle rod 851 of the second baffle assembly 85b moves up to release the balls. The steel balls will then be arranged sequentially from the position of the baffle rod 851 of the first baffle assembly 85a backwards. When the balls reach the sensing area of ​​the second sensor 832, the second sensor 832 recognizes this. At this point, the section between the first baffle assembly 85a and the second baffle assembly 85b is also full of balls, and contains a set number of steel balls (the number of steel balls is a common divisor of the number of boxes in a collection box; for example, if a box contains 300 steel balls, the two baffle assemblies will each contain 25 balls). Then, the first baffle... The first material blocking component 85a moves its stop bar 851 upward to release the balls, while the second material blocking component 85b moves its stop bar 851 downward to block the balls. At the same time, a timer starts. After a set time (which ensures that all steel balls between the two material blocking components have rolled out), the first material blocking component 85a moves its stop bar downward again to block the balls, and the second material blocking component 85b moves its stop bar upward again to release the balls. This process is repeated until the required number of steel balls for one collection box 811 is reached. Then, the controller controls the turntable drive mechanism 82 to rotate the turntable 81 one notch, which moves the next adjacent collection box 811 to the set position. Finally, the count is reset to zero.

Claims

1. A steel ball sorting and screening structure, characterized in that... include: Rack (10); The roller (51) extends horizontally and is rotatably mounted on the frame (10). It can be driven by the first drive mechanism (61) to rotate around its own axis. The roller (51) is hollow in the axial direction to form an installation channel (511). The roller (51) is also provided with a detection channel (513) that extends radially from the outside to the inside through the installation channel (511). The detection channel (513) of the roller (51) has at least a feeding state, a detection state, a first discharge state, and a second discharge state as the position of the roller (51) changes. The opening orientation of the detection channel (513) of the roller (51) in the feeding state, detection state, first discharge state, and second discharge state is different. The roller shaft (52) is movably disposed in the mounting channel (511) of the roller (51) and can contact the steel ball installed in the through hole of the roller (51), thereby driving the steel ball in the detection channel (513) of the roller (51) to rotate and unfold. The visual inspection device (7) is used to acquire image information of the steel ball in the inspection channel (513) of the roller (51) in the inspection state; The first discharge rack (541) is used to receive qualified steel balls that roll out from the detection channel (513) of the roller (51) in the first discharge state; The second discharge rack (542) is used to receive defective steel balls that roll out from the detection channel (513) of the roller (51) in the second discharge state; The ball-blocking assembly (53) includes a ball-blocking member (531) that can be moved between a ball-blocking position and a ball-releasing position by a fourth drive mechanism (532). When the ball-blocking member (531) is in the ball-blocking position, the outer port (5131) of the detection channel (513) of the roller (51) in the first discharge state is blocked by the ball-blocking member (531). When the ball-blocking member (531) is in the ball-releasing position, the ball-blocking member (531) is away from the outer port (5131) of the detection channel (513) of the roller (51) in the first discharge state, allowing the steel ball in the detection channel (513) of the roller (51) to roll out.

2. The steel ball sorting and screening structure according to claim 1, characterized in that: The first discharge rack (541) and the second discharge rack (542) are arranged sequentially from top to bottom. The detection channel (513) of the roller (51) has an inner port (5132) connected to the installation channel (511) and an outer port (5131) away from the installation channel (511). The detection channel (513) of the roller (51) in the first discharge state and the second discharge state both extend downward from its inner port (5132) to its outer port (5131). The second angle formed between the extension direction of the detection channel (513) of the roller (51) in the second discharge state and the horizontal direction is greater than the first angle formed between the extension direction of the detection channel (513) of the roller (51) in the first discharge state and the horizontal direction.

3. The steel ball sorting and screening structure according to claim 2, characterized in that: The first included angle is denoted as α, and the value of α is in the range of 0° < α < 15°. The second included angle is denoted as β, and the value of β is in the range of 90° < β < 105°.

4. The steel ball sorting and screening structure according to claim 1, characterized in that: The fourth drive mechanism (532) includes a first pneumatic push rod, and the ball stopper (531) is connected to the end of the telescopic rod of the first pneumatic push rod.

5. The steel ball sorting and screening structure according to claim 1, characterized in that: It also includes a controller. The first drive mechanism (61), the fourth drive mechanism (532) and the vision inspection device (7) are all electrically connected to the controller. The controller can control the first drive mechanism (61) and the fourth drive mechanism (532) to operate according to the steel ball detection information obtained by the vision inspection device (7), so that the qualified steel balls and unqualified steel balls that have been detected will roll out from the detection channel (513) when the roller (51) rotates to the corresponding first discharge state position and second discharge state position, respectively.

6. The steel ball sorting and screening structure according to any one of claims 1 to 5, characterized in that: The detection channels (513) have four arranged at intervals along the circumference of the roller (51). Each detection channel (513) passes through the above-mentioned feeding state, detection state, first discharge state and second discharge state in sequence as the roller (51) rotates.

7. The steel ball sorting and screening structure according to claim 6, characterized in that: Four detection channels (513) arranged circumferentially along the roller (51) are referred to as a detection hole group. The detection hole group has at least two channels arranged sequentially along the axial direction of the roller (51), and the two detection channels (513) that are opposite each other in the axial direction of the roller (51) in any two adjacent detection hole groups have the same extension direction. The ball-blocking assembly (53) has at least two corresponding to the number of the above-mentioned detection hole groups.

8. The steel ball sorting and screening structure according to any one of claims 1 to 5, characterized in that: Both the first discharge rack (541) and the second discharge rack (542) gradually slope downward from the end closest to the roller (51) to the end furthest from the roller (51).

9. The steel ball sorting and screening structure according to any one of claims 1 to 5, characterized in that: It also includes a cleaning tank (17) located at the end of the second discharge rack (542) to receive steel balls that fail the inspection.

10. The steel ball sorting and screening structure according to any one of claims 1 to 5, characterized in that: It also includes a second drive mechanism (62) for driving the roller shaft (52) to rotate around its own axis and a third drive mechanism (63) for driving the roller shaft (52) to reciprocate along its own axis.

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