Automatic screening and removing device for steel balls

Abstract

The invention discloses an automatic screening and removing device for steel balls, and relates to the technical field of steel ball sorting. Comprising a conveying belt, a carrying gripper and a sorting machine, the sorting machine comprises a base table, a detection disc, a material distributing rotary disc and a removing assembly, the detection disc is fixedly installed at the top of the base table, an annular conveying sliding groove is formed in the upper surface of the detection disc, and the conveying sliding groove is provided with a detection area and a ball leakage hole; the ball leaking hole is used for discharging the detected special-shaped steel balls, and the removing assembly is used for conveying the special-shaped steel balls discharged from the ball leaking hole; a material distribution rotating disc is arranged above the detection disc, a plurality of ball containing grooves are formed in the material distribution rotating disc and used for containing steel balls, and a plurality of idler wheels are arranged on the side wall of each ball containing groove. The shape of the steel balls is detected in the detection area, the steel balls are pushed to make all-dimensional contact with the detection area through the rolling wheels in the ball containing grooves, dead-angle-free detection is achieved, the special-shaped steel balls are automatically removed, continuous detection can be achieved, the detected steel balls are automatically sorted, and subsequent procedures are not affected.

Description

Technical Field

[0001] The invention relates to the technical field of steel ball sorting, and in particular to an automatic steel ball screening and rejecting device. Background Art

[0002] In the production process of steel balls, affected by many complex factors, special-shaped steel balls often appear. Among them, the uneven quality of the steel itself is a key factor. The presence of internal impurities or the appearance of segregation will significantly interfere with the crystallization process of the steel ball in the forging or casting process. In the subsequent processing links, this interference directly causes the steel ball forming process to deviate from the ideal state, and it is very easy to produce irregular shapes and form special-shaped steel balls. At the same time, the temperature control accuracy and pressure balance during the forging process, the casting speed during casting, the rationality of the mold design, and the turbulence generated when the molten steel fills the mold are all important reasons for causing the special shape of steel balls.

[0003] For some high-precision instruments and meters, there are extremely strict requirements on the forming accuracy of steel balls. In order to ensure that the quality of steel balls meets the standards, machine vision systems, roundness meters and other equipment are usually used to conduct detailed inspections of the surface condition and roundness of steel balls one by one. With their high-resolution image acquisition and precise measurement algorithms, these devices can accurately identify tiny defects and shape deviations of steel balls, and the screening accuracy is extremely high. However, this type of screening method has significant limitations. On the one hand, the equipment purchase cost is high, and a large amount of funds need to be invested in equipment procurement and maintenance; on the other hand, the detection process is time-consuming and inefficient, and it is difficult to meet the needs of large-scale and high-efficiency production. Therefore, in industries with relatively low requirements for steel ball precision, such as the ball mill field, this type of screening method is not applicable.

[0004] Ball mills are widely used in coal preparation plant grinding operations and cement grinding in the construction industry. In these applications, steel balls are mainly used to grind materials, and the requirements for their roundness are relatively loose. At present, this field mainly uses screens with different sizes of mesh to screen different types of steel balls. The basic principle is to use the difference in the external dimensions between special-shaped steel balls and standard steel balls to clamp or prevent the special-shaped steel balls from passing through the screen, thereby achieving preliminary screening and elimination. However, this traditional screening method has many defects. Since the steel ball is spherical in shape, during the screening process, when there is a raised special-shaped part on one side of the steel ball, if the posture of the steel ball at the moment of passing through the screen happens to make the raised part perpendicular to the screen hole, then the special-shaped steel ball may pass through the screen smoothly, resulting in missed screening.

[0005] In summary, although the current machine vision system screening method can ensure the quality of steel balls, it faces the dual problems of high cost and low efficiency. It is not suitable for industries such as ball mills that do not have high requirements for roundness. The screen screening method has the problem of missed detection. Therefore, the development of a device that can significantly improve the screening accuracy and effectively remove special-shaped steel balls has its practical significance and application value. Summary of the invention

[0006] The purpose of the present invention is to solve the problems raised in the background technology and to propose an automatic screening and rejecting device for steel balls.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: An automatic steel ball screening and rejection device comprises: a conveyor belt, a handling gripper and a sorting machine, wherein the sorting machine comprises a base, a detection disk, a material dividing turntable and a rejection assembly, wherein the detection disk is fixed on the base, and an annular conveying chute is provided on the upper surface, wherein the conveying chute is provided with a detection area and a ball leakage hole, wherein the detection area is used for screening special-shaped steel balls, and the ball leakage hole is used for discharging the detected special-shaped steel balls; The rejection assembly includes a rejection chute and a lifting pad. The rejection chute is located below the detection plate and is used to transport the special-shaped steel balls discharged from the ball leakage hole. The material distribution turntable is located above the detection disk, the material distribution turntable is rotationally connected to the base, and is driven to rotate by a rotating column located at the center of the base. A plurality of ball placing grooves for placing steel balls are arranged in a circular array on the material distribution turntable, and the ball placing grooves are located directly above the conveying chute. A plurality of rollers are arranged on the side walls of each ball placing groove for pushing the steel balls to continuously change the rolling direction.

[0008] As a further solution of the present invention: the detection area is composed of an outer shell and an inner elastic membrane, the outer shell is fixedly connected to the detection plate, and the inner elastic membrane is connected to the conveying chute end to end to form a complete annular chute; A semi-arc-shaped limit plate is provided between the inner elastic membrane and the outer shell, the limit plate is fixed to the outer shell, and the limit plate is covered with sensing units for detecting steel balls, and the sensing units support the inner elastic membrane from the inside; An induction plate is arranged between the limiting plate and the outer shell, and the induction plate is fixed to the outer shell.

[0009] As a further solution of the present invention: the sensing unit includes a limit rod, a detection head and a limit block; The limit rod passes through the limit plate, with one end facing the inner elastic membrane and the other end facing the sensing plate. The detection head is fixedly installed on the end of the limit rod facing the inner elastic membrane, and the limit block is fixedly installed on the end of the limit rod facing the sensing plate. A first spring is mounted on the limit rod, and the first spring is located between the limit plate and the detection head. The bottom of the limit block is fixed on the sensing plate through a second spring, and the sensing plate is provided with a pressure sensor at a position corresponding to each second spring.

[0010] As a further solution of the present invention: the side of the detection head facing the internal elastic membrane is configured as a spherical surface, and the detection head is in contact with the internal elastic membrane to support the internal elastic membrane.

[0011] As a further solution of the present invention: a plurality of grooves are arranged on the side wall of the ball placing groove, a roller is installed in each groove, the rollers are distributed in a circular array in the ball placing groove, and each roller is driven to rotate by a motor.

[0012] As a further solution of the present invention: the roller adopts a telescopic structure. When the roller is in a retracted state, it is located in the groove. When the roller is in an extended state, it protrudes out of the groove and fits with the surface of the steel ball.

[0013] As a further solution of the present invention: the lifting pad is located in the ball leakage hole, used to block the ball leakage hole, and the lifting pad is inlaid with the shape of the conveying chute; The bottom of the lifting pad is connected to a cylinder and is driven by the cylinder to lift and lower. The cylinder is fixedly installed below the detection plate through a connecting plate.

[0014] As a further solution of the present invention: the rejection chute is fixedly installed below the detection plate, and the rejection chute is provided with a through opening just below the ball leakage hole, and the through opening is consistent in size with the ball leakage hole; When the lifting pad is in an ascending state, it is embedded in the ball leakage hole, and when the lifting pad is in a descending state, it is embedded in the through opening.

[0015] As a further solution of the present invention: the end of the rejection chute close to the ball leakage hole is a closed end, the end away from the ball leakage hole is an open end, and the overall direction of the rejection chute is inclined toward the open end.

[0016] As a further solution of the present invention: the conveyor belt and the transport gripper are each provided with two groups, namely a first conveyor belt, a first transport gripper, a second conveyor belt and a second transport gripper; The first transport gripper transports the undetected steel balls on the first conveyor belt to the ball placement groove on the material distribution turntable; The second transport gripper transports the steel balls detected in the ball-setting grooves on the material distribution turntable to the second conveyor belt.

[0017] Compared with the prior art, the present invention has the following advantages: 1: Intelligent precision detection and automatic rejection. The induction unit in the detection area is used to detect the shape of the steel ball. The induction unit determines whether the steel ball has any irregular shape based on the pressure when it contacts the surface of the steel ball. For steel balls that are judged to be irregular, they will be guided through specially designed ball leakage holes, and then the rejection operation will be successfully completed through the rejection chute. Qualified steel balls will automatically enter the subsequent production process.

[0018] 2: All-round detection without blind spots. In the process of detecting steel balls, special rollers are installed inside the ball-setting groove designed by the present invention. These rollers push the steel balls to continuously change the rolling direction. In this process, various areas of the steel balls are able to fully contact with the internal elastic membrane in turn, ensuring all-round and blind-spot detection of the steel balls, fundamentally eliminating the drawbacks of missed detection caused by steel ball posture problems in existing screen screening technology.

[0019] 3: Efficient continuous testing and seamless connection with process: During the entire testing process, the steel ball always maintains a stable transmission motion state, completely abandoning the inefficient mode of traditional testing equipment pausing to test individual steel balls one by one, greatly improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the sorting machine of the present invention; Figure 3 It is a schematic diagram of the split structure of the sorting machine of the present invention; Figure 4 It is a structural schematic diagram of the material distribution turntable of the present invention; Figure 5 for Figure 4 A schematic diagram of the local enlarged structure at point A in the middle; Figure 6 It is a structural schematic diagram of the detection disk of the present invention; Figure 7 It is a structural schematic diagram of the detection area of ​​the present invention; Figure 8 for Figure 7 A schematic diagram of the local enlarged structure at B in the middle; Fig. 9 It is a schematic diagram of the internal structure of the detection area of ​​the present invention; Fig.10 This is a schematic diagram of the internal structure of the detection area of ​​the present invention when detecting a special-shaped steel ball; Fig.11 It is a schematic diagram of the installation structure of the rejection component of the present invention; Fig.12 It is a structural schematic diagram of the present invention when the lifting pad of the rejection component is in an ascending state; Fig.13It is a schematic structural diagram of the present invention when the lifting pad of the rejection component is in a descending state.

[0021] In the figure: 1. sorting machine; 2. base; 21. rotating column; 3. detection plate; 31. conveying chute; 311. ball leakage hole; 4. material distribution turntable; 41. ball placement groove; 411. groove; 42. roller; 5. rejection component; 51. rejection chute; 511. through port; 52. lifting pad; 521. cylinder; 522. connecting plate; 6. detection area; 61. outer shell; 62. inner elastic membrane; 63. limit plate; 64. induction unit; 641. limit rod; 642. detection head; 643. limit block; 644. first spring; 645. second spring; 65. induction plate; 7. first conveyor belt; 71. second conveyor belt; 8. first handling gripper; 81. second handling gripper. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1-13 , an automatic screening and rejection device for steel balls, mainly composed of a conveyor belt, a transport gripper and a sorting machine 1. The sorting machine 1 comprises a base 2, a detection disk 3, a material distribution turntable 4 and a rejection component 5. The conveyor belt and the transport gripper are each provided with two groups, namely a first conveyor belt 7, a first transport gripper 8, a second conveyor belt 71 and a second transport gripper 81; the first transport gripper 8 transports the undetected steel balls on the first conveyor belt 7 to the ball placement groove 41 on the material distribution turntable 4; the second transport gripper 81 transports the detected steel balls in the ball placement groove 41 on the material distribution turntable 4 to the second conveyor belt 71, the position where the first transport gripper 8 places the steel balls can be called a loading station, and the position where the second transport gripper 81 takes away the steel balls can be called an unloading station.

[0024] The base 2 is installed on the ground as the basic supporting structure of the entire sorting machine. A detection disk 3 is fixedly installed on the top of the base 2. An annular conveying chute 31 is provided on the upper surface of the detection disk 3. The conveying chute 31 is the main movement trajectory channel of the steel ball on the detection disk 3.

[0025] The material distribution turntable 4 is above the detection disk 3, and the material distribution turntable 4 is rotatably connected with the base 2 through the rotating column 21 located at the center of the base 2, and the material distribution turntable 4 can rotate at a constant speed around the rotating column 21. A plurality of ball placement grooves 41 are distributed in a circular array on the material distribution turntable 4, and the ball placement grooves 41 are just located above the conveying chute 31, for placing the steel balls to be detected, and a plurality of rollers 42 are arranged on the side wall of each ball placement groove 41.

[0026] Reference Figure 1-5 , three rollers 42 are arranged on the side wall of each ball-setting groove 41, and these rollers 42 are arranged in a circular array, and each roller 42 has a different orientation. In specific operation, the first handling gripper 8 first carries the undetected steel balls on the first conveyor belt 7 to the ball-setting groove 41 on the material distribution turntable 4. At this time, the material distribution turntable 4 starts to rotate under the drive of the rotating column 21, driving the ball-setting groove 41 and the steel balls inside to rotate together and move along the conveying chute 31. The conveying chute 31 is provided with a detection area 6. When the ball-setting groove 41 rotates to the position of the detection area 6, the rollers 42 start to play a role. The three rollers 42 in the ball-setting groove 41 push the steel balls to roll in different directions in turn. Since only the bottom of the steel ball contacts the detection area 6 during the rolling process, if the steel ball only rolls in one direction, it is very likely that some areas will not contact the detection area 6, and thus cannot be detected by the detection area 6. Therefore, the existence of the rollers 42 is to push the steel balls to roll in different directions to ensure that each area of ​​the steel balls is detected.

[0027] In some embodiments, a plurality of grooves 411 are provided on the side wall of the ball placement groove 41, and a roller 42 is installed in each groove 411. The rollers 42 are distributed in a circular array in the ball placement groove 41, and each roller 42 is driven by a motor and rotates independently. This design enables the rollers 42 to better ensure that the steel balls are detected in all directions in the detection area 6. At the same time, the rollers 42 adopt a telescopic structure (an electric telescopic rod or a spring structure can be used to allow the rollers 42 to achieve a telescopic effect). When the rollers 42 are in a retracted state, they are located in the grooves 411. When the steel balls are to be placed in or taken out of the ball placement grooves 41, the rollers 42 are in a retracted state, which does not affect the placement and removal of the steel balls; when the rollers 42 are in an extended state, they protrude from the grooves 411 and fit the surface of the steel balls, and begin to push the steel balls to roll.

[0028] Reference Figure 6-10 The detection area 6 is composed of an outer shell 61 and an inner elastic membrane 62. The outer shell 61 is fixedly connected to the detection disk 3. The inner elastic membrane 62 is connected end to end with the conveying chute 31 to form a complete annular chute. The inner elastic membrane 62 is a layer of elastic film (can be made of rubber or TPE material), and the four sides of the inner elastic membrane 62 are fixed on the outer shell 61.

[0029] In some embodiments, reference Figure 9-10The bottom of the contact surface between the detection area 6 and the steel ball is set as a hard bottom surface, which is a part of the outer shell 61 and becomes the main force-bearing area of ​​the steel ball. The two side areas use an internal elastic membrane 62 as the detection part, and the sensing unit 64 is set at the position corresponding to the internal elastic membrane 62.

[0030] Inside the outer shell, a semi-arc-shaped limit plate 63 is provided between the inner elastic membrane 62 and the outer shell 61. The limit plate 63 is covered with sensing units 64 for detecting the steel ball. The sensing units 64 support the inner elastic membrane 62 from the inside. When the steel ball moves to the detection area 6 along the ball-setting groove 41, the steel ball will continuously adjust the rolling direction under the action of the roller 42 so that different areas of the steel ball can contact the inner elastic membrane 62. A sensing plate 65 is provided between the limit plate 63 and the outer shell 61, and the sensing plate 65 is fixed to the outer shell 61.

[0031] The sensing unit 64 includes a limit rod 641, a detection head 642 and a limit block 643. The limit rod 641 passes through the limit plate 63, one end of which faces the inner elastic membrane 62 and is fixedly installed with the detection head 642 (the side of the detection head 642 facing the inner elastic membrane 62 is set to be a spherical surface), and the other end faces the sensing plate 65 and is fixedly installed with the limit block 643. The limit rod 641 is sleeved with a first spring 644, and the first spring 644 is located between the limit plate 63 and the detection head 642. The bottom of the limit block 643 is fixed to the sensing plate 65 through a second spring 645, and the sensing plate 65 is provided with a pressure sensor at a position corresponding to each second spring 645. When the steel ball contacts the inner elastic membrane 62, pressure is generated on the detection head 642, and the detection head 642 transmits the pressure to the limit rod 641, and the limit rod 641 transmits the pressure to the limit block 643, thereby causing the second spring 645 to deform. The pressure sensor on the sensing plate 65 determines whether the steel ball is irregular according to the pressure change.

[0032] When the steel ball is convex, Fig.10 As shown, the raised part of the steel ball will push the detection head 642 and the limit rod 641 to move, causing the compression amount of the second spring 645 to change. At this time, the pressure detected by the pressure sensor on the sensing plate 65 will exceed the preset value, thereby judging that the steel ball is irregular.

[0033] The inner elastic membrane 62 is supported by numerous sensing units 64 and presents a chute shape. The area diameter is set according to the diameter of the steel ball to be detected and is slightly smaller than the diameter of the steel ball, so as to detect concave and shaped steel balls. When the concave part of the concave and shaped steel ball contacts the inner elastic membrane 62, the pressure on the detection head 642 does not reach the predetermined value, and the steel ball is judged to be shaped.

[0034] Reference Figure 2-13When the detection area 6 detects the irregular steel ball, the ball leakage hole 311 and the rejection component 5 start to work. The rejection component 5 includes a rejection chute 51 and a lifting pad 52. The lifting pad 52 is located in the ball leakage hole 311, and is used to block the ball leakage hole 311. The lifting pad 52 is fitted in shape with the conveying chute 31. The bottom of the lifting pad 52 is connected to the cylinder 521, and is driven by the cylinder 521 to lift and lower (the cylinder 521 is fixedly installed under the detection disk 3 through the connecting plate 522). The rejection chute 51 is fixedly installed under the detection disk 3, and the rejection chute 51 is provided with a through opening 511 directly below the ball leakage hole 311, and the through opening 511 is consistent in size with the ball leakage hole 311.

[0035] After the special-shaped steel ball is detected, when the ball trough 41 and the steel ball inside it rotate together to the position of the ball leakage hole 311 (at this time the steel ball is located on the lifting pad 52), the cylinder 521 drives the lifting pad 52 to descend, and the steel ball is supported by the lifting pad 52 and descends together. When the lifting pad 52 is in the ascending state, it is embedded in the ball leakage hole 311 to prevent normal steel balls from falling, allowing normal steel balls to continue to move along the conveying chute 31 to the unloading station; when the lifting pad 52 is in the descending state, it is embedded in the opening 511 to fill the vacant position of the rejection chute 51, so that the rejection chute 51 becomes a complete chute.

[0036] The end of the rejection chute 51 close to the ball leakage hole 311 is a closed end, and the end away from the ball leakage hole 311 is an open end. The end plate of the closed end of the rejection chute 51 is fixedly connected to the detection disk 3, and the overall direction of the rejection chute 51 is inclined toward the open end, so that the special-shaped steel balls can be discharged smoothly from the open end under the action of gravity (the distance between the top edge of the rejection chute 51 and the detection disk 3 should be much smaller than the diameter of the steel ball to avoid accidental falling of the steel ball).

[0037] For qualified steel balls, the dividing turntable 4 continues to rotate until the steel balls reach the unloading station, and the second transport gripper 81 transports the inspected steel balls in the ball groove 41 on the dividing turntable 4 to the second conveyor belt 71 and transports them to the next station for subsequent processing or treatment.

[0038] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0039] The working steps of this application are as follows: S1: The first transport gripper 8 transports the undetected steel balls on the first conveyor belt 7 to the ball placement groove 41 on the material distribution turntable 4. At this time, if the roller 42 is in a retracted state, it will first extend to fit the surface of the steel ball; S2: The material distribution turntable 4 rotates under the drive of the rotating column 21, driving the ball-setting groove 41 and the steel ball to rotate. When the steel ball moves to the detection area 6 with the ball-setting groove 41, the roller 42 drives the steel ball to roll, so that different areas of the steel ball contact the inner elastic membrane 62. The sensing unit 64 senses the pressure change of the steel ball on it through the detection head 642, and determines whether the steel ball is irregular in shape; S3: If a special-shaped steel ball is detected, the cylinder 521 drives the lifting pad 52 to descend, and the special-shaped steel ball passes through the ball leakage hole 311, enters the rejection chute 51 along the lifting pad 52, and is discharged from the open end along the inclined rejection chute 51; if it is a qualified steel ball, the material distribution turntable 4 continues to rotate; S4: The material distribution turntable 4 rotates the qualified steel balls after the test to the unloading station, and the second transport gripper 81 transports them from the ball placement groove 41 to the second conveyor belt 71 and transports them to the next station; S5: After completing the inspection of a batch of steel balls, if further inspection is required, repeat steps S1 to S4 until the inspection is completed.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic steel ball screening and rejection device, comprising a conveyor belt, a handling gripper and a sorting machine (1), characterized in that: The sorting machine (1) comprises a base (2), a detection disk (3), a material distribution turntable (4) and a rejection assembly (5); the detection disk (3) is fixed on the base (2) and has an annular conveying chute (31) on its upper surface; the conveying chute (31) is provided with a detection area (6) and a ball leakage hole (311); the detection area (6) is used for screening irregular-shaped steel balls, and the ball leakage hole (311) is used for discharging the detected irregular-shaped steel balls; The rejecting assembly (5) comprises a rejecting chute (51) and a lifting pad (52); the rejecting chute (51) is located below the detection plate (3) and is used to transport the irregular-shaped steel balls discharged from the ball leakage hole (311); The material distribution turntable (4) is located above the detection disk (3), the material distribution turntable (4) is rotatably connected to the base (2), and is driven to rotate by a rotating column (21) located at the center of the base (2). A plurality of ball placement grooves (41) for placing steel balls are arranged in a circular array on the material distribution turntable (4), and the ball placement grooves (41) are located directly above the conveying chute (31). A plurality of rollers (42) are arranged on the side wall of each ball placement groove (41) for pushing the steel balls to continuously change the rolling direction.

2. The automatic steel ball screening and rejection device according to claim 1 is characterized in that: The detection area (6) is composed of an outer shell (61) and an inner elastic membrane (62), the outer shell (61) is fixedly connected to the detection plate (3), and the inner elastic membrane (62) is butted end to end with the conveying chute (31) to form a complete annular chute; A semi-arc-shaped limiting plate (63) is provided between the inner elastic membrane (62) and the outer shell (61), the limiting plate (63) is fixed to the outer shell (61), and the limiting plate (63) is covered with sensing units (64) for detecting steel balls, and the sensing units (64) support the inner elastic membrane (62) from the inside; An induction plate (65) is provided between the limiting plate (63) and the outer shell (61), and the induction plate (65) is fixed to the outer shell (61).

3. The automatic steel ball screening and rejection device according to claim 2 is characterized in that: The sensing unit (64) comprises a limiting rod (641), a detection head (642) and a limiting block (643); The limiting rod (641) passes through the limiting plate (63), with one end facing the inner elastic membrane (62) and the other end facing the sensing plate (65); the detection head (642) is fixedly installed on the end of the limiting rod (641) facing the inner elastic membrane (62), and the limiting block (643) is fixedly installed on the end of the limiting rod (641) facing the sensing plate (65); a first spring (644) is sleeved on the limiting rod (641), and the first spring (644) is located between the limiting plate (63) and the detection head (642); The bottom of the limit block (643) is fixed on the sensing plate (65) via a second spring (645), and the sensing plate (65) is provided with a pressure sensor at a position corresponding to each second spring (645).

4. The automatic steel ball screening and rejection device according to claim 3 is characterized in that: The side of the detection head (642) facing the internal elastic membrane (62) is arranged to be a spherical surface, and the detection head (642) is in contact with the internal elastic membrane (62) to support the internal elastic membrane (62).

5. The automatic steel ball screening and rejection device according to claim 4 is characterized in that: A plurality of grooves (411) are provided on the side wall of the ball placement groove (41), a roller (42) is installed in each groove (411), the rollers (42) are distributed in a circular array in the ball placement groove (41), and each roller (42) is driven to rotate by a motor.

6. The automatic steel ball screening and rejection device according to claim 5, characterized in that: The roller (42) adopts a telescopic structure; when the roller (42) is in a retracted state, it is located in the groove (411); when the roller (42) is in an extended state, it protrudes out of the groove (411) and fits against the surface of the steel ball.

7. The automatic steel ball screening and rejection device according to claim 6, characterized in that: The lifting pad (52) is located in the ball leakage hole (311) and is used to block the ball leakage hole (311). The lifting pad (52) is fitted in shape with the conveying chute (31); The bottom of the lifting pad (52) is connected to the cylinder (521) and is driven by the cylinder (521) to move up and down. The cylinder (521) is fixedly mounted below the detection plate (3) via a connecting plate (522).

8. The automatic steel ball screening and rejection device according to claim 7, characterized in that: The rejection chute (51) is fixedly installed below the detection plate (3), and the rejection chute (51) is provided with a through opening (511) just below the ball leakage hole (311), and the through opening (511) is consistent in size with the ball leakage hole (311); When the lifting pad (52) is in an ascending state, it is embedded in the ball leakage hole (311); when the lifting pad (52) is in a descending state, it is embedded in the through opening (511).

9. The automatic steel ball screening and rejection device according to claim 8, characterized in that: The end of the rejection chute (51) close to the ball leakage hole (311) is a closed end, the end away from the ball leakage hole (311) is an open end, and the overall direction of the rejection chute (51) is inclined toward the open end.

10. The automatic steel ball screening and rejection device according to claim 9, characterized in that: The conveyor belt and the transport gripper are each provided with two groups, namely a first conveyor belt (7), a first transport gripper (8), a second conveyor belt (71) and a second transport gripper (81); The first transport gripper (8) transports the undetected steel balls on the first conveyor belt (7) to the ball placement groove (41) on the material distribution turntable (4); The second transport gripper (81) transports the steel balls detected in the ball placement grooves (41) on the material distribution turntable (4) to the second conveyor belt (71).

Images