Separation equipment and separation method for steel balls with different diameters

Abstract

The invention discloses separation equipment for steel balls with different diameters and a sorting method.The separation equipment comprises a rack, a mounting base, a supporting frame, a bottom plate, a compression spring and a vibration motor, a screening mechanism is arranged in the mounting base and comprises an adjusting mechanism, a mounting mechanism and a driving mechanism, and the adjusting mechanism comprises a transmission roller, a guide groove, a guide rail, a guide block and a sliding block; the transmission roller is movably connected to the inner surface of the mounting base, the guide grooves are threaded and are distributed in a mirror image mode with the transmission roller as the center point, the guide rails are symmetrically arranged on the top surface of the mounting base, the guide blocks are in sliding fit with the guide rails, and the sliding blocks are in sliding connection with the guide grooves. According to the separation equipment and the separation method for the steel balls with the different diameters, due to high-precision transmission of the transmission chain wheels and the transmission chains and precise matching of the transmission rollers and the sliding blocks, the adjustment precision of the distance between the screening rods is guaranteed, the preset separation requirement can be met, and the high-precision separation requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of steel ball sorting, in particular to a separation device and a sorting method for steel balls of different diameters. Background Art

[0002] In the existing technology, steel ball sorting equipment usually adopts a fixed-pitch sorting mechanism, which is effective for sorting steel balls within a specific diameter range. However, when steel balls of different sizes and specifications need to be sorted during the production process, this fixed-pitch sorting mechanism shows its limitations. The fixed pitch cannot adapt to the sorting requirements of steel balls of different diameters, resulting in unsatisfactory sorting results.

[0003] In order to solve this problem, some sorting devices with adjustable spacing have appeared on the market. These devices can adapt to steel balls of different diameters by adjusting the spacing of the sorting mechanism. However, these sorting devices with adjustable spacing generally have the following problems: Existing adjustable spacing sorting equipment often cannot achieve equal spacing adjustment, resulting in inconsistent sizes of sorted steel balls, which not only affects the quality of the product, but also increases the difficulty of subsequent processing procedures; When a specific spacing value needs to be achieved, the existing adjustment mechanism often has poor accuracy and is difficult to achieve the predetermined sorting requirements. This accuracy problem will cause large deviations in the size of the sorted steel balls and cannot meet the needs of high-precision sorting. Summary of the invention

[0004] The object of the present invention is to provide a separation device and a separation method for steel balls of different diameters, so as to solve the problems of adjusting unequal spacing and poor adjustment accuracy mentioned in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: a separation device and a sorting method for steel balls of different diameters, comprising a frame, a mounting seat, a support frame, a bottom plate, a compression spring and a vibration motor, wherein the mounting seat is mounted at one end of the inner side of the frame, the support frame is symmetrically distributed on the bottom surface of the frame, the bottom plate is located at the bottom end of the frame, a compression spring is arranged between the bottom plate and the support frame, the vibration motor is mounted on the bottom surface of the frame, and a screening mechanism is arranged inside the mounting seat; The screening mechanism includes an adjustment mechanism, a mounting mechanism and a driving mechanism. The adjustment mechanism includes a transmission roller, a guide groove, a guide rail, a guide block and a slider. The transmission roller is movably connected to the inner surface of the mounting seat. The guide groove is threaded and mirror-distributed with the transmission roller as the center point. The guide rail is symmetrically arranged on the top surface of the mounting seat. The guide block is slidably matched with the guide rail, and the slider is slidably connected with the guide groove. The mounting mechanism comprises a sliding bracket, a mounting bracket, a screening rod and a cushion block, the sliding bracket is movably mounted on the top surface of the guide block, the sliding bracket is fixedly connected to the slider, the mounting bracket is movably mounted on the top of the sliding bracket, the screening rod is threadedly connected to the outer surface of one end of the mounting bracket, the number of the screening rods is the same as the number of the mounting brackets, and cushion blocks are arranged at equal intervals on the outer surfaces of the screening rods near one end of the inner wall of the frame; The driving mechanism includes a shell, a stepper motor, a transmission sprocket, a transmission chain and a tension wheel. The shell is installed on the outer surface of one end of the frame, the stepper motor is installed on the outer surface of the shell, and the output end of the stepper motor and one end of the transmission roller are respectively provided with a transmission sprocket. The outer surface of the transmission sprocket is connected with the transmission chain, and the top end of the transmission chain is fitted with a tension wheel.

[0006] As a preferred technical solution of the present invention, a partition is provided at the front end of the frame, and the inclination angle of the partition is the same as the inclination angle of the frame.

[0007] By adopting the above technical solution, the partition separates the two material unloading spaces inside the frame, namely the upper end for the steel balls with larger diameter and the lower end for the steel balls with smaller diameter, and the angles of inclination are the same, so that the materials can be unloaded at a relatively uniform speed, avoiding damage caused by rapid collision of the steel balls or blockage caused by slow speed.

[0008] As a preferred technical solution of the present invention, the screening rod forms a sliding adjustment structure through a sliding bracket and a mounting bracket and a mounting seat, and the screening rod is movably connected to the top surface of the partition.

[0009] By adopting the above technical scheme, the screening rods adjust their own spacing by sliding, and the other end of the screening rods can be slid and adjusted along the surface of the partition to keep the spacing between multiple screening rods equidistant. At the same time, the transmission mechanism for controlling the spacing of the screening rods is a stepper motor and a guide groove setting of the stepper motor. The rotation accuracy of the stepper motor is very high, and it is equipped with a low-clearance transmission sprocket and transmission chain for transmission. The surface of the transmission roller is provided with guide grooves corresponding to the number of screening rods. The distribution spacing of the guide grooves and the fit with the inner wall of the slider are accurately adjusted equidistantly by sliding.

[0010] As a preferred technical solution of the present invention, the frame is symmetrically provided with slide grooves, the slide grooves are inclined structures, and the slide grooves are movably connected with slide plates.

[0011] By adopting the above technical solution, the slide groove provides sliding space for the slide plate. During the equidistant adjustment of the screening rods, the distance between the slide plate and the inner wall of the frame will change. The slide plate adjusts by sliding and changes its own angle to fit with the pad on the outer wall of the screening rod to fill the gap between the outer screening rods and guide the steel balls.

[0012] As a preferred technical solution of the present invention, the length of the slide plate is the same as the length of the inner wall of the slide groove, and the height of the slide groove is greater than 3 times the thickness of the slide plate.

[0013] By adopting the above technical solution, the connection between the skateboard and the slide groove is almost tight, which prevents the slide groove from tilting laterally during the adjustment process. At the same time, the height of the slide groove is greater than times the thickness of the skateboard, and the space can meet the angle changes that occur during the adjustment process of the skateboard.

[0014] As a preferred technical solution of the present invention, the slide plate and the pad are movably connected, and the slide plate and the pad have the same inclination angle when they are in contact with each other.

[0015] By adopting the above technical solution, the skateboard is fitted on the top of the pad in a fitting manner and supported by the pad with the same inclination angle, which can ensure support while ensuring fit and enable smooth material guiding.

[0016] As a preferred technical solution of the present invention, an upper guide plate is provided at one end of the partition, a lower guide plate is provided at the bottom end of the upper guide plate, the lower guide plate is fixedly connected to the bottom surface of the frame, and the angle between the upper guide plate and the partition is an obtuse angle.

[0017] By adopting the above technical solution, the upper guide plate and the lower guide plate both have a certain inclination angle and are connected to the frame at an obtuse angle, which is convenient for discharging in different directions and leaves space for arranging the collection box at the bottom of the upper guide plate and the lower guide plate.

[0018] As a preferred technical solution of the present invention, discharge ports are respectively provided between the upper guide plate, the lower guide plate and the frame.

[0019] By adopting the above technical solution, the discharge port and the inner wall of the frame are also inclined, which is convenient for guiding the screened steel balls to move to the surfaces of the upper guide plate and the lower guide plate.

[0020] As a preferred technical solution of the present invention, a feed bin is arranged at the top of the frame, and the bottom of the feed bin is inclined and extends toward one end of the screening rod.

[0021] With the above technical solution, the feed bin is the steel ball feed port, steel balls are discharged from the upper end of the feed bin and roll downward along the inner wall of the feed bin, and the bottom outlet of the feed bin is at the top of multiple screening rods.

[0022] As a preferred technical solution of the present invention, the sliding bracket is connected by sliding along the texture of the guide groove through the bottom slider, the curvature of the bottom surface of the slider is the same as the curvature of the guide groove, and the outer edge of the slider fits with the inner edge of the guide groove.

[0023] By adopting the above technical solution, in order to ensure accurate transmission and improve transmission accuracy, the bottom of the slider is rounded to keep the same curvature as the top surface of the transmission roller, and to ensure that there is no gap between the slider and the inner wall of the guide groove, further improving the transmission accuracy.

[0024] A method for sorting steel balls of different diameters comprises the following steps: S1. Prepare to feed the steel balls to be sorted into the sorting equipment through the feed bin, and ensure that all parts of the sorting equipment, including the screening rods, partitions, slides, etc., are in the initial position; S2, start the equipment, start the vibration motor, make the frame vibrate, so as to make the steel balls roll along the feed bin into the sorting area, start the stepper motor, and drive the transmission roller to rotate through the transmission sprocket and transmission chain; S3. Adjust the spacing of the screening bars. According to the diameter of the steel balls to be sorted, the spacing of the screening bars is accurately controlled by the stepper motor. The following are the detailed steps for adjusting the spacing of the screening bars: a. Determine the screening rod spacing corresponding to the target steel ball diameter; b. The stepper motor receives the control signal and starts to rotate, driving the transmission roller to rotate; c. The transmission roller rotates to drive the slider in the guide groove to move, thereby pushing the screening rods to slide along the guide block to adjust the spacing between the screening rods; d. There is a preset correspondence between the number of rotation steps of the stepper motor and the adjustment amount of the screening bar spacing, ensuring the precise adjustment of the screening bar spacing; Motor control accuracy parameters: The step angle of the stepper motor is usually 1.8 degrees, but a motor with a smaller step angle can be selected as needed to improve the sorting accuracy; The number of pulses of the stepper motor. Each pulse corresponds to the distance the screening bar moves. For example, if 10 pulses are required for the screening bar to move 0.1 mm, then to adjust the spacing of the screening bars to a specific value, the corresponding number of pulses needs to be sent; The transmission ratio of the transmission sprocket and the transmission chain determines the distance the screening bar moves when the stepper motor rotates one circle. The higher the transmission ratio, the higher the adjustment accuracy of the screening bar spacing. The matching accuracy between the transmission roller and the slider, and the matching accuracy between the guide groove on the surface of the transmission roller and the curvature at the bottom of the slider, determine the adjustment accuracy of the spacing between the screening bars. S4, sorting steel balls. When the steel balls roll between the screening bars, due to the precise control of the spacing between the screening bars, the steel balls will be separated into different feeding spaces according to their diameters. The steel balls with larger diameters are discharged from the upper feeding space, and the steel balls with smaller diameters are discharged from the lower feeding space. S5, collecting steel balls. The sorted steel balls are guided to move to the surface of the upper guide plate and the lower guide plate through the discharge port. The steel balls roll on the guide plates and finally enter the collection box, completing the sorting process.

[0025] Compared with the prior art, the invention has the following beneficial effects on the separation equipment and separation method for steel balls of different diameters: Through the precise control of the stepper motor, the equal spacing adjustment of the screening bar spacing is achieved, ensuring that the size of the sorted steel balls is consistent, thereby improving the quality of the product and reducing the difficulty of subsequent processing procedures. The high-precision transmission of the transmission sprocket and the transmission chain, as well as the precise coordination of the transmission roller and the slider, ensure the adjustment accuracy of the screening bar spacing, which can meet the predetermined sorting requirements and meet the needs of high-precision sorting. Through the sliding adjustment structure, the spacing adjustment of the screening bars becomes simple and quick, and can be achieved without stopping the machine, which improves production efficiency and reduces the labor intensity of workers. The design of the chute and the slide plate makes the screening bar spacing adjustment process more compact and stable, avoids the problem of lateral tilt during the adjustment process, and improves the reliability and durability of the sorting equipment. The inclined design of the upper and lower guide plates, as well as the setting of the discharge port, allows the sorted steel balls to be easily guided to the collection boxes in different directions, improving production efficiency and flexibility. The inclined design of the feed bin allows the steel balls to roll along the inner wall into the sorting area, avoiding collision and blockage between steel balls, and improving the sorting effect and the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional internal cross-sectional structure of the frame of the present invention; Figure 3 It is a schematic diagram of the overall top view structure of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the transmission roller and the slider of the present invention; Figure 5 This is a schematic diagram of the internal three-dimensional structure of the mounting base of the present invention; Figure 6 This is a schematic diagram of the internal side structure of the mounting base of the present invention; Figure 7 It is a schematic diagram of the overall formal three-dimensional structure of the present invention.

[0027] In the figure: 1. frame; 2. mounting seat; 3. transmission roller; 4. guide groove; 5. sliding bracket; 6. mounting bracket; 7. screening rod; 8. partition; 9. pad; 10. guide rail; 11. discharge port; 12. upper guide plate; 13. lower guide plate; 14. housing; 15. stepper motor; 16. transmission sprocket; 17. transmission chain; 18. tension wheel; 19. support frame; 20. bottom plate; 21. compression spring; 22. vibration motor; 23. slide groove; 24. slide plate; 25. feed bin; 26. guide block; 27. slider. DETAILED DESCRIPTION

[0028] See also Figure 1-7 The present invention provides a technical solution: a steel ball separation device and a sorting method for different diameters, comprising a frame 1, a mounting seat 2, a support frame 19, a bottom plate 20, a compression spring 21 and a vibration motor 22, wherein the mounting seat 2 is mounted on one end of the inner side of the frame 1, the support frame 19 is symmetrically distributed on the bottom surface of the frame 1, the bottom plate 20 is located at the bottom end of the frame 1, a compression spring 21 is arranged between the bottom plate 20 and the support frame 19, the vibration motor 22 is mounted on the bottom surface of the frame 1, and a screening mechanism is arranged inside the mounting seat 2; The screening mechanism includes an adjustment mechanism, a mounting mechanism and a driving mechanism. The adjustment mechanism includes a transmission roller 3, a guide groove 4, a guide rail 10, a guide block 26 and a slider 27. The transmission roller 3 is movably connected to the inner surface of the mounting seat 2. The guide groove 4 is threaded and mirror-distributed with the transmission roller 3 as the center point. The guide rail 10 is symmetrically arranged on the top surface of the mounting seat 2. The guide block 26 is slidably matched with the guide rail 10, and the slider 27 is slidably connected with the guide groove 4. The mounting mechanism includes a sliding bracket 5, a mounting bracket 6, a screening rod 7 and a cushion block 9. The sliding bracket 5 is movably mounted on the top surface of the guide block 26. The sliding bracket 5 is fixedly connected to the slider 27. The mounting bracket 6 is movably mounted on the top of the sliding bracket 5. The screening rod 7 is threadedly connected to the outer surface of one end of the mounting bracket 6. The number of the screening rods 7 is the same as the number of the mounting brackets 6. The outer surfaces of the screening rods 7 near one end of the inner wall of the frame 1 are provided with cushion blocks 9 at equal intervals. The driving mechanism includes a shell 14, a stepper motor 15, a transmission sprocket 16, a transmission chain 17 and a tension wheel 18. The shell 14 is installed on the outer surface of one end of the frame 1, and the stepper motor 15 is installed on the outer surface of the shell 14. The output end of the stepper motor 15 and one end of the transmission roller 3 are respectively provided with a transmission sprocket 16, and the outer surface of the transmission sprocket 16 is connected to the transmission chain 17, and the top of the transmission chain 17 is fitted and connected to the tension wheel 18.

[0029] A partition 8 is provided at the front end of the frame 1, and the inclination angle of the partition 8 is the same as that of the frame 1. The partition 8 separates two material unloading spaces inside the frame 1, namely, the upper end for lowering larger diameter steel balls and the lower end for guiding smaller diameter steel balls, and the angles and inclinations are the same, so that the materials can be unloaded at a relatively uniform speed to avoid damage caused by rapid collision of the steel balls or blockage caused by slow speed.

[0030] The screening rods 7 form a sliding adjustment structure with the mounting seat 2 through the sliding bracket 5 and the mounting bracket 6. The screening rods 7 are movably connected to the top surface of the partition 8. The screening rods 7 adjust their own spacing by sliding, and the other end of the screening rods 7 can be slid and adjusted along the surface of the partition 8 to keep the spacing between multiple screening rods 7 equidistant. At the same time, the transmission mechanism for controlling the spacing of the screening rods 7 is a stepper motor 15 and a guide groove 4 of the stepper motor 15. The rotation accuracy of the stepper motor 15 is very high, and it is equipped with a low-clearance transmission sprocket 16 and a transmission chain 17 for transmission. The surface of the transmission roller 3 is provided with guide grooves 4 corresponding to the number of screening rods 7. The distribution spacing of the guide grooves 4 and the fit with the inner wall of the slider 27 are accurately adjusted equidistantly by sliding.

[0031] The inside of the frame 1 is symmetrically provided with a slide groove 23, which is an inclined structure, and a slide plate 24 is movably connected inside the slide groove 23. The slide groove 23 provides a sliding space for the slide plate 24. During the equidistant adjustment process of the screening rods 7, the distance between the slide plate and the inner wall of the frame 1 will change. The slide plate 24 is adjusted in a sliding manner and changes its own angle to fit with the pad 9 on the outer wall of the screening rod 7 to fill the gap between the outer screening rod 7 and the screening rod 7, and guide the steel balls.

[0032] The length of the slide plate 24 is the same as the length of the inner wall of the slide groove 23. The height of the slide groove 23 is 3 times greater than the thickness of the slide plate 24. The connection between the slide plate 24 and the slide groove 23 is almost fitting, which prevents the slide groove 23 from tilting laterally during the adjustment process. At the same time, the height of the slide groove 23 is 3 times greater than the thickness of the slide plate 24, and the space can meet the angle changes that occur during the adjustment process of the slide plate 24.

[0033] The slide plate 24 and the pad 9 are movably connected. When the slide plate 24 and the pad 9 are fitted together, the inclination angle is the same. The slide plate 24 is fitted on the top of the pad 9 in a fitting manner and is supported by the pad 9. The inclination angle is the same, which can ensure support while ensuring fit, and can smoothly carry out the material guiding work.

[0034] An upper guide plate 12 is provided at one end of the partition 8, and a lower guide plate 13 is provided at the bottom end of the upper guide plate 12. The lower guide plate 13 is fixedly connected to the bottom surface of the frame 1, and the angle between the upper guide plate 12 and the partition 8 is an obtuse angle. Both the upper guide plate 12 and the lower guide plate 13 have a certain inclination angle, and the connecting end with the frame 1 is an obtuse angle, which is convenient for discharging in different directions and convenient for leaving space for arranging the collection box at the bottom of the upper guide plate 12 and the lower guide plate 13.

[0035] Discharge ports 11 are respectively provided between the upper guide plate 12 and the lower guide plate 13 and the frame 1 , and the discharge ports 11 and the inner wall of the frame 1 are also inclined to facilitate guiding the screened steel balls to move to the surfaces of the upper guide plate 12 and the lower guide plate 13 .

[0036] A feed bin 25 is provided at the top of the frame 1. The bottom of the feed bin 25 is inclined and extends toward one end of the screening rod 7. The feed bin 25 is a steel ball feed port. Steel balls are discharged from the upper end of the feed bin 25 and roll downward along the inner wall of the feed bin 25. The bottom outlet of the feed bin 25 is at the top of multiple screening rods 7.

[0037] The sliding bracket 5 is connected by sliding along the texture of the guide groove 4 through the bottom slider 27. The curvature of the bottom surface of the slider 27 is the same as the curvature of the guide groove 4. The outer edge of the slider 27 fits with the inner edge of the guide groove 4. In order to ensure accurate transmission and improve transmission accuracy, the bottom of the slider 27 is made into an arc to maintain the same curvature as the top surface of the transmission roller 3, and to ensure that there is no gap between the slider 27 and the inner wall of the guide groove 4, thereby further improving the transmission accuracy.

[0038] A method for sorting steel balls of different diameters comprises the following steps: S1. Prepare to feed the steel balls to be sorted into the sorting equipment through the feed bin, and ensure that all parts of the sorting equipment, including the screening rods, partitions, slides, etc., are in the initial position; S2, start the equipment, start the vibration motor, make the frame vibrate, so as to make the steel balls roll along the feed bin into the sorting area, start the stepper motor, and drive the transmission roller to rotate through the transmission sprocket and transmission chain; S3. Adjust the spacing of the screening bars. According to the diameter of the steel balls to be sorted, the spacing of the screening bars is accurately controlled by the stepper motor. The following are the detailed steps for adjusting the spacing of the screening bars: a. Determine the screening rod spacing corresponding to the target steel ball diameter; b. The stepper motor receives the control signal and starts to rotate, driving the transmission roller to rotate; c. The transmission roller rotates to drive the slider in the guide groove to move, thereby pushing the screening rods to slide along the guide block to adjust the spacing between the screening rods; d. There is a preset correspondence between the number of rotation steps of the stepper motor and the adjustment amount of the screening bar spacing, ensuring the precise adjustment of the screening bar spacing; Motor control accuracy parameters: The step angle of the stepper motor is usually 1.8 degrees, but a motor with a smaller step angle can be selected as needed to improve the sorting accuracy; The number of pulses of the stepper motor. Each pulse corresponds to the distance the screening bar moves. For example, if 10 pulses are required for the screening bar to move 0.1 mm, then to adjust the spacing of the screening bars to a specific value, the corresponding number of pulses needs to be sent; The transmission ratio of the transmission sprocket and the transmission chain determines the distance the screening bar moves when the stepper motor rotates one circle. The higher the transmission ratio, the higher the adjustment accuracy of the screening bar spacing. The matching accuracy between the transmission roller and the slider, and the matching accuracy between the guide groove on the surface of the transmission roller and the curvature at the bottom of the slider, determine the adjustment accuracy of the spacing between the screening bars. S4, sorting steel balls. When the steel balls roll between the screening bars, due to the precise control of the spacing between the screening bars, the steel balls will be separated into different feeding spaces according to their diameters. The steel balls with larger diameters are discharged from the upper feeding space, and the steel balls with smaller diameters are discharged from the lower feeding space. S5, collecting steel balls. The sorted steel balls are guided to move to the surface of the upper guide plate and the lower guide plate through the discharge port. The steel balls roll on the guide plates and finally enter the collection box, completing the sorting process.

[0039] Working principle: the stepper motor 15 is connected through the transmission sprocket 16 at the drive output end, and the transmission chain 17 cooperates with the transmission sprocket 16 at one end of the transmission roller 3 to realize linkage, so that the transmission roller 3 is in a rotating state, and the slider 27 at the bottom of the sliding bracket 5 slides along the texture of the guide groove 4, thereby driving multiple screening rods 7 to be adjusted at equal intervals, and one end of the slide plate 24 supports the top of the pad 9 of the outermost screening rod 7, and then the vibration motor 22 is started, and the steel balls to be sorted enter the sorting equipment through the feed bin 25. The inclined design of the bottom of the feed bin allows the steel balls to roll along the inner wall and enter the sorting area. The start of the vibration motor 22 causes the machine The rack 1 generates periodic vibrations, causing the steel balls to accelerate their rolling in the feed bin and enter the sorting area. According to the diameter of the steel balls to be sorted, the spacing of the screening bars is adjusted through the control of the stepper motor. When the steel balls enter the sorting area, due to the precise control of the spacing of the screening bars, the steel balls will be separated into different unloading spaces according to their diameters. The steel balls with larger diameters are discharged from the upper unloading space, while the steel balls with smaller diameters are discharged from the lower guide space. The sorted steel balls are guided by the discharge port 11 to the surfaces of the upper guide plate 12 and the lower guide plate 13. The steel balls roll on the guide plates and finally enter the collection box to complete the sorting process.

Claims

1. A device for separating steel balls of different diameters, characterized in that: The invention comprises a frame (1), a mounting seat (2), a support frame (19), a bottom plate (20), a compression spring (21) and a vibration motor (22), wherein the mounting seat (2) is mounted on one end of the inner side of the frame (1), the support frame (19) is symmetrically distributed on the bottom surface of the frame (1), the bottom plate (20) is located at the bottom end of the frame (1), a compression spring (21) is arranged between the bottom plate (20) and the support frame (19), the vibration motor (22) is mounted on the bottom surface of the frame (1), and a screening mechanism is arranged inside the mounting seat (2); The screening mechanism comprises an adjusting mechanism, a mounting mechanism and a driving mechanism. The adjusting mechanism comprises a transmission roller (3), a guide groove (4), a guide rail (10), a guide block (26) and a slider (27). The transmission roller (3) is movably connected to the inner surface of the mounting seat (2). The guide groove (4) is threaded and mirror-distributed with the transmission roller (3) as the center point. The guide rail (10) is symmetrically arranged on the top surface of the mounting seat (2). The guide block (26) is slidably matched with the guide rail (10). The slider (27) is slidably connected to the guide groove (4). The mounting mechanism comprises a sliding bracket (5), a mounting bracket (6), a screening rod (7) and a cushion block (9), wherein the sliding bracket (5) is movably mounted on the top surface of the guide block (26), the sliding bracket (5) is fixedly connected to the slider (27), the mounting bracket (6) is movably mounted on the top of the sliding bracket (5), the screening rod (7) is threadedly connected to the outer surface of one end of the mounting bracket (6), the number of the screening rods (7) is the same as the number of the mounting brackets (6), and cushion blocks (9) are arranged at equal intervals on the outer surface of the screening rod (7) at one end close to the inner wall of the frame (1); The driving mechanism comprises a housing (14), a stepper motor (15), a transmission sprocket (16), a transmission chain (17) and a tension wheel (18); the housing (14) is mounted on the outer surface of one end of the frame (1); the stepper motor (15) is mounted on the outer surface of the housing (14); the output end of the stepper motor (15) and one end of the transmission roller (3) are respectively provided with a transmission sprocket (16); the outer surface of the transmission sprocket (16) is connected to the transmission chain (17); and the top end of the transmission chain (17) is fittedly connected to the tension wheel (18); A method for sorting steel balls of different diameters comprises the following steps: S1. Prepare to feed the steel balls to be sorted into the sorting equipment through the feed bin, and ensure that all parts of the sorting equipment, including the screening rods, partitions, slides, etc., are in the initial position; S2, start the equipment, start the vibration motor, make the frame vibrate, so as to make the steel balls roll along the feed bin into the sorting area, start the stepper motor, and drive the transmission roller to rotate through the transmission sprocket and transmission chain; S3. Adjust the spacing of the screening bars. According to the diameter of the steel balls to be sorted, the spacing of the screening bars is accurately controlled by the stepper motor. The following are the detailed steps for adjusting the spacing of the screening bars: a. Determine the screening rod spacing corresponding to the target steel ball diameter; b. The stepper motor receives the control signal and starts to rotate, driving the transmission roller to rotate; c. The transmission roller rotates to drive the slider in the guide groove to move, thereby pushing the screening rods to slide along the guide block to adjust the spacing between the screening rods; d. There is a preset correspondence between the number of rotation steps of the stepper motor and the adjustment amount of the screening bar spacing, ensuring the precise adjustment of the screening bar spacing; Motor control accuracy parameters: The step angle of the stepper motor is usually 1.8 degrees, but a motor with a smaller step angle can be selected as needed to improve the sorting accuracy; The number of pulses of the stepper motor. Each pulse corresponds to the distance the screening bar moves. For example, if 10 pulses are required for the screening bar to move 0.1 mm, then to adjust the spacing of the screening bars to a specific value, the corresponding number of pulses needs to be sent; The transmission ratio of the transmission sprocket and the transmission chain determines the distance the screening bar moves when the stepper motor rotates one circle. The higher the transmission ratio, the higher the adjustment accuracy of the screening bar spacing. The matching accuracy between the transmission roller and the slider, and the matching accuracy between the guide groove on the surface of the transmission roller and the curvature at the bottom of the slider, determine the adjustment accuracy of the spacing between the screening bars. S4, sorting steel balls. When the steel balls roll between the screening bars, due to the precise control of the spacing between the screening bars, the steel balls will be separated into different feeding spaces according to their diameters. The steel balls with larger diameters are discharged from the upper feeding space, and the steel balls with smaller diameters are discharged from the lower feeding space. S5, collecting steel balls. The sorted steel balls are guided to move to the surface of the upper guide plate and the lower guide plate through the discharge port. The steel balls roll on the guide plates and finally enter the collection box, completing the sorting process.

2. The separation device and separation method for steel balls of different diameters according to claim 1, characterized in that: A partition plate (8) is provided at the front end of the frame (1), and the inclination angle of the partition plate (8) is the same as the inclination angle of the frame (1).

3. The device for separating steel balls of different diameters according to claim 1, characterized in that: The screening rod (7) forms a sliding adjustment structure with the mounting seat (2) via the sliding bracket (5) and the mounting bracket (6), and the screening rod (7) is movably connected to the top surface of the partition plate (8).

4. The device for separating steel balls of different diameters according to claim 1, characterized in that: The frame (1) is symmetrically provided with slide grooves (23), the slide grooves (23) are in an inclined structure, and a slide plate (24) is movably connected inside the slide grooves (23).

5. The device for separating steel balls of different diameters according to claim 4, characterized in that: The length of the slide plate (24) is the same as the length of the inner wall of the slide groove (23), and the height of the slide groove (23) is 3 times greater than the thickness of the slide plate (24).

6. The device for separating steel balls of different diameters according to claim 4, characterized in that: The slide plate (24) and the cushion block (9) are movably connected, and the slide plate (24) and the cushion block (9) have the same inclination angle when they are in contact with each other.

7. The device for separating steel balls of different diameters according to claim 2, characterized in that: An upper material guide plate (12) is provided at one end of the partition plate (8), a lower material guide plate (13) is provided at the bottom end of the upper material guide plate (12), the lower material guide plate (13) is fixedly connected to the bottom surface of the frame (1), and the angle between the upper material guide plate (12) and the partition plate (8) is an obtuse angle.

8. The device for separating steel balls of different diameters according to claim 7, characterized in that: A material outlet (11) is respectively provided between the upper material guide plate (12), the lower material guide plate (13) and the frame (1).

9. The device for separating steel balls of different diameters according to claim 1, characterized in that: A feed bin (25) is provided at the top of the frame (1), and the bottom of the feed bin (25) is inclined and extends towards one end of the screening rod (7).

10. The device for separating steel balls of different diameters according to claim 1, characterized in that: The sliding bracket (5) is connected by sliding along the texture of the guide groove (4) through the bottom slider (27), the curvature of the bottom surface of the slider (27) is the same as the curvature of the guide groove (4), and the outer edge of the slider (27) and the inner edge of the guide groove (4) are in contact with each other.

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